/* =============================================================
   HACK WITH GDG S4 — GLOBAL DESIGN SYSTEM & STYLESHEET
   Living Digital World · Neo-Brutalist Visual Identity · Google Palette
   ============================================================= */

/* === DESIGN TOKENS === */
:root {
  /* Google GDG Brand Colors */
  --blue:         #4285F4;
  --blue-dark:    #1967D2;
  --blue-light:   #E8F0FE;
  --red:          #EA4335;
  --red-dark:     #C5221F;
  --red-light:    #FCE8E6;
  --yellow:       #FBBC04;
  --yellow-dark:  #F29900;
  --yellow-light: #FEF7E0;
  --green:        #34A853; /* Primary Dominant Brand Color */
  --green-dark:   #1E8E3E;
  --green-mid:    #2D9E4A;
  --green-light:  #E6F4EA;
  --forest:       #0D3320;

  /* Neutral Surfaces & Ink */
  --gray-0:   #FFFFFF;
  --gray-50:  #FAFAF9;
  --gray-100: #F5F3EE; /* Paper Background */
  --gray-150: #EFECE6;
  --gray-200: #E0DDD6;
  --gray-300: #C8C4BC;
  --gray-400: #A09C96;
  --gray-500: #6B6864;
  --gray-600: #4A4844;
  --gray-700: #2C2A28;
  --gray-800: #1A1918;
  --gray-900: #0A0A0A; /* Heavy Black Ink */

  --ink:         var(--gray-900);
  --paper:       var(--gray-100);
  --surface:     var(--gray-0);
  --surface-alt: var(--gray-150);
  --line:        var(--gray-200);
  --muted:       var(--gray-500);

  /* Typography */
  --display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --body:    'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono:    'Space Mono', monospace;

  --leading-tight:  0.88;
  --leading-snug:   1.05;
  --leading-normal: 1.35;
  --leading-loose:  1.65;

  --tracking-tight:   -0.045em;
  --tracking-snug:    -0.025em;
  --tracking-normal:   0;
  --tracking-wide:     0.05em;
  --tracking-wider:    0.08em;
  --tracking-widest:   0.12em;

  /* Spacing Scale */
  --sp-1:  4px;
  --sp-2:  8px;
  --sp-3:  12px;
  --sp-4:  16px;
  --sp-5:  20px;
  --sp-6:  24px;
  --sp-7:  28px;
  --sp-8:  32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-14: 56px;
  --sp-16: 64px;
  --sp-20: 80px;
  --sp-24: 96px;
  --sp-32: 128px;

  /* Borders & Shadows (Neo-Brutalist Architecture) */
  --radius-sm:   2px;
  --radius-md:   4px;
  --radius-lg:   8px;
  --radius-full: 9999px;

  --border-ink:     2.5px solid var(--ink);
  --border-card:    2px solid var(--ink);
  --border-thin:    1px solid var(--line);

  --shadow-hard-sm: 3px 3px 0 var(--ink);
  --shadow-hard:    5px 5px 0 var(--ink);
  --shadow-hard-lg: 8px 8px 0 var(--ink);
  --shadow-green:   5px 5px 0 var(--green);
  --shadow-blue:    5px 5px 0 var(--blue);
  --shadow-red:     5px 5px 0 var(--red);
  --shadow-yellow:  5px 5px 0 var(--yellow);

  /* Easing & Timing */
  --ease-standard:   cubic-bezier(0.4, 0, 0.2, 1);
  --ease-decelerate: cubic-bezier(0, 0, 0.2, 1);
  --ease-accelerate: cubic-bezier(0.4, 0, 1, 1);
  --ease-spring:     cubic-bezier(0.34, 1.56, 0.64, 1);

  --dur-fast:   150ms;
  --dur-base:   240ms;
  --dur-slow:   400ms;
  --dur-reveal: 600ms;

  /* Z-Index Hierarchy */
  --z-base:    0;
  --z-raised:  10;
  --z-overlay: 50;
  --z-nav:     100;
  --z-modal:   200;

  /* Layout Containers */
  --section-y: clamp(28px, 3.5vw, 48px);
  --section-x: clamp(20px, 5vw, 64px);
  --content-max: 1240px;
}

/* =============================================================
   BASE RESETS & GLOBAL SETUP
   ============================================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
}
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: var(--leading-loose);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg {
  display: block;
  max-width: 100%;
}
button {
  font-family: inherit;
  background: none;
  border: none;
}
a {
  color: inherit;
  text-decoration: none;
}
em {
  font-style: normal;
}

/* Max content wrapper for all sections */
.section-pad {
  padding: var(--section-y) var(--section-x);
}
.section-pad > * {
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
}

/* Subtle architectural page grid */
.page-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-base);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.18;
  contain: strict;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--sp-4);
  z-index: calc(var(--z-nav) + 10);
  padding: var(--sp-2) var(--sp-4);
  background: var(--ink);
  color: var(--paper);
  font: 700 11px var(--mono);
  letter-spacing: var(--tracking-wide);
  border: 2px solid var(--green);
  transition: top var(--dur-fast) var(--ease-standard);
}
.skip-link:focus {
  top: var(--sp-2);
}

/* =============================================================
   ANNOUNCEMENT BANNER
   ============================================================= */
.announcement {
  position: relative;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  padding: 10px var(--section-x);
  background: var(--ink);
  color: var(--paper);
  font: 600 11px var(--mono);
  letter-spacing: var(--tracking-wide);
  border-bottom: 1.5px solid var(--gray-800);
}
.announcement a {
  color: var(--green);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--green);
  padding-bottom: 1px;
  transition: color var(--dur-fast) var(--ease-standard);
}
.announcement a:hover {
  color: var(--yellow);
  border-bottom-color: var(--yellow);
}
.live-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--green);
  flex-shrink: 0;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(1.4); opacity: 0.4; }
}

/* =============================================================
   FLOATING NEO-BRUTALIST PILL NAVBAR (OVER ANIMATED SCENE)
   ============================================================= */
.site-header {
  position: fixed;
  top: clamp(10px, 1.8vh, 18px);
  left: 50%;
  transform: translateX(-50%);
  z-index: var(--z-nav);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 1.8vw, 28px);
  padding: 0 clamp(16px, 1.8vw, 24px);
  width: auto;
  max-width: calc(100vw - 32px);
  height: clamp(52px, 6.2vh, 60px);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 2.5px solid var(--ink);
  border-radius: 999px;
  box-shadow: 4px 4px 0 var(--ink);
  transition:
    transform var(--dur-base) var(--ease-standard),
    box-shadow var(--dur-base) var(--ease-standard),
    background var(--dur-base) var(--ease-standard);
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 4px 4px 0 var(--ink), 0 8px 24px rgba(10, 10, 10, 0.12);
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
  border-right: 2px solid var(--line);
  padding-right: clamp(12px, 1.6vw, 20px);
}
.brand-logo {
  height: clamp(28px, 3.6vh, 34px);
  width: auto;
  display: block;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.6vw, 24px);
}
.desktop-nav a {
  position: relative;
  font: 800 clamp(12px, 1vw, 13.5px) var(--mono);
  letter-spacing: 0.08em;
  color: var(--ink);
  padding: 4px 2px;
  text-transform: uppercase;
  transition: color var(--dur-fast) var(--ease-standard), transform var(--dur-fast) var(--ease-standard);
}
.desktop-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2.5px;
  background: var(--green);
  transition: width var(--dur-base) var(--ease-standard);
}
.desktop-nav a:hover {
  color: var(--green-dark);
  transform: translateY(-1px);
}
.desktop-nav a.active {
  color: var(--green);
}
.desktop-nav a.active::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  padding: var(--sp-2);
  width: 44px;
  height: 44px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--ink);
  transition: transform var(--dur-base) var(--ease-standard), opacity var(--dur-base) var(--ease-standard);
}
.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Mobile Nav Drawer */
.mobile-nav {
  position: fixed;
  inset: 70px 0 0;
  background: var(--paper);
  z-index: calc(var(--z-nav) - 1);
  padding: var(--sp-10) var(--section-x);
  border-top: var(--border-ink);
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--dur-base) var(--ease-decelerate), opacity var(--dur-base) var(--ease-decelerate);
}
.mobile-nav.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.mobile-nav nav {
  display: flex;
  flex-direction: column;
  gap: var(--sp-6);
}
.mobile-nav a {
  font: 800 clamp(1.8rem, 6vw, 2.5rem) / 1.1 var(--display);
  letter-spacing: var(--tracking-snug);
  color: var(--ink);
  transition: color var(--dur-fast) var(--ease-standard);
}
.mobile-nav a:hover {
  color: var(--green);
}
.mobile-apply {
  margin-top: var(--sp-4);
  color: var(--green) !important;
  border-bottom: 2px solid var(--green);
  padding-bottom: var(--sp-1);
  width: fit-content;
}

/* Nav Toast */
.nav-toast {
  position: fixed;
  bottom: var(--sp-6);
  left: 50%;
  transform: translateX(-50%) translateY(calc(100% + var(--sp-8)));
  z-index: var(--z-modal);
  background: var(--ink);
  color: var(--paper);
  font: 600 13px var(--mono);
  padding: 12px 24px;
  border: 2px solid var(--green);
  box-shadow: var(--shadow-hard);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: transform var(--dur-base) var(--ease-decelerate), opacity var(--dur-base) var(--ease-decelerate);
}
.nav-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* =============================================================
   BUTTONS & CTAs (NEO-BRUTALIST HARD SHADOWS)
   ============================================================= */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 15px 30px;
  font: 700 13px var(--mono);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border: var(--border-ink);
  cursor: pointer;
  position: relative;
  box-shadow: var(--shadow-hard);
  transition:
    transform  var(--dur-fast) var(--ease-standard),
    box-shadow var(--dur-fast) var(--ease-standard),
    background var(--dur-fast) var(--ease-standard);
}
.button:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-hard-lg);
}
.button:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}

.button-primary {
  background: var(--green);
  color: white;
}
.button-primary:hover {
  background: var(--green-dark);
}

.button-ghost {
  background: var(--surface);
  color: var(--ink);
}
.button-ghost:hover {
  background: var(--green-light);
}

.button-dark {
  background: var(--ink);
  color: white;
}
.button-dark:hover {
  background: var(--green);
  border-color: var(--ink);
}

.button-light {
  background: white;
  color: var(--ink);
}
.button-light:hover {
  background: var(--yellow);
}

.button-outline {
  background: transparent;
  color: var(--ink);
}
.button-outline:hover {
  background: var(--ink);
  color: white;
}

.text-link {
  font: 700 12px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--ink);
  border-bottom: 2px solid var(--green);
  padding-bottom: 2px;
  transition: border-color var(--dur-base) var(--ease-standard), color var(--dur-base) var(--ease-standard);
}
.text-link:hover {
  color: var(--green-dark);
  border-color: var(--green-dark);
}
.text-link-light {
  color: white;
  border-bottom-color: rgba(255, 255, 255, 0.5);
}
.text-link-light:hover {
  color: var(--yellow);
  border-bottom-color: var(--yellow);
}

/* =============================================================
   SECTION EYEBROWS & HEADINGS
   ============================================================= */
.eyebrow {
  font: 700 11px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-transform: uppercase;
}
.eyebrow-rule {
  display: inline-block;
  width: 28px;
  height: 2.5px;
  background: var(--green);
  flex-shrink: 0;
}

/* Standardized Section Headings */
.section-intro h2,
.tl-head h2,
.exp-head h2,
.rewards-head h2,
.innovation-head h2,
.journey .section-intro h2,
.archives .section-intro h2,
.organizers .section-intro h2,
.sponsor-top h2,
.venue-head h2,
.faq .section-intro h2 {
  font: 900 clamp(2.8rem, 6.5vw, 6rem) / var(--leading-tight) var(--display);
  letter-spacing: var(--tracking-tight);
  margin: var(--sp-4) 0 0;
  color: var(--ink);
}
.section-intro h2 em,
.tl-head h2 em,
.exp-head h2 em,
.rewards-head h2 em,
.innovation-head h2 em,
.journey .section-intro h2 em,
.archives .section-intro h2 em,
.organizers .section-intro h2 em,
.sponsor-top h2 em,
.venue-head h2 em,
.faq .section-intro h2 em {
  color: var(--green);
}

/* =============================================================
   REVEAL ANIMATIONS (PROGRESSIVE ENHANCEMENT — NEVER TRAPS VISIBILITY)
   ============================================================= */
.reveal {
  opacity: 1;
  transform: none;
}
.js-reveal-ready .reveal.will-animate {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur-reveal) var(--ease-decelerate), transform var(--dur-reveal) var(--ease-decelerate);
}
.js-reveal-ready .reveal.will-animate.visible {
  opacity: 1;
  transform: none;
}
.reveal-delay {
  transition-delay: 140ms;
}

/* =============================================================
   HERO SCENE — LIVING GREEN DIGITAL FOREST (S4 NATURE EDITION)
   ============================================================= */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100svh;
  height: 100vh;
  min-height: 540px;
  max-height: 100vh;
  overflow: hidden;
  background: #DFF2E3;
  border-bottom: var(--border-ink);
}

.hero-world {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

/* Sky Background Gradient */
.hw-sky {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 90% 55% at 50% 0%, rgba(52, 168, 83, 0.28) 0%, transparent 70%),
    radial-gradient(ellipse 45% 35% at 15% 20%, rgba(66, 133, 244, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 35% 28% at 85% 15%, rgba(251, 188, 4, 0.14) 0%, transparent 60%),
    linear-gradient(180deg, #D5EED8 0%, #E8F5EC 50%, #C4E6CB 100%);
}

/* Top Hanging Canopy Vines (Framing Screen Corners) */
.hw-canopy {
  position: absolute;
  top: -10px;
  z-index: 3;
  pointer-events: none;
  filter: drop-shadow(0 6px 12px rgba(10, 10, 10, 0.08));
}
.hw-canopy svg {
  display: block;
  width: 100%;
  height: auto;
}
.hw-canopy-left {
  left: -10px;
  width: clamp(180px, 22vw, 320px);
  transform-origin: top left;
  animation: canopy-sway-left 8s ease-in-out infinite alternate;
}
.hw-canopy-right {
  right: -10px;
  width: clamp(180px, 22vw, 320px);
  transform-origin: top right;
  animation: canopy-sway-right 9s ease-in-out infinite alternate 0.8s;
}

@keyframes canopy-sway-left {
  0%   { transform: rotate(0deg) scale(1); }
  50%  { transform: rotate(1.8deg) scale(1.02); }
  100% { transform: rotate(-1.2deg) scale(0.99); }
}
@keyframes canopy-sway-right {
  0%   { transform: rotate(0deg) scale(1); }
  50%  { transform: rotate(-1.8deg) scale(1.02); }
  100% { transform: rotate(1.2deg) scale(0.99); }
}

/* Illustrated Drifting Cartoon Clouds */
.hw-clouds {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 1;
  pointer-events: none;
}
.hw-cloud {
  position: absolute;
  pointer-events: none;
  filter: drop-shadow(0 4px 8px rgba(10, 10, 10, 0.04));
}
.hw-cloud svg {
  display: block;
}
.hw-cloud-1 {
  top: 7%;
  width: clamp(120px, 13vw, 190px);
  animation: cloud-drift-1 65s linear infinite;
  opacity: 0.92;
}
.hw-cloud-2 {
  top: 19%;
  width: clamp(95px, 10vw, 150px);
  animation: cloud-drift-2 78s linear infinite -30s;
  opacity: 0.88;
}
.hw-cloud-3 {
  top: 4%;
  width: clamp(80px, 8vw, 120px);
  animation: cloud-drift-3 92s linear infinite -55s;
  opacity: 0.82;
}

@keyframes cloud-drift-1 {
  0%   { transform: translateX(-240px); }
  100% { transform: translateX(calc(100vw + 240px)); }
}
@keyframes cloud-drift-2 {
  0%   { transform: translateX(-200px); }
  100% { transform: translateX(calc(100vw + 200px)); }
}
@keyframes cloud-drift-3 {
  0%   { transform: translateX(-160px); }
  100% { transform: translateX(calc(100vw + 160px)); }
}

/* 3-Layer Rolling Green Forest Hills */
.hw-hills {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1;
  pointer-events: none;
}
.hw-scroll-wrap {
  position: absolute;
  bottom: 0;
  left: 0;
  display: flex;
  width: 200%;
}
.hw-terrain-svg {
  flex: 0 0 50%;
  width: 50%;
  display: block;
}
.hw-scroll-far {
  height: clamp(140px, 20vh, 240px);
  animation: env-scroll-fwd 48s linear infinite;
}
.hw-scroll-mid {
  height: clamp(110px, 16vh, 190px);
  animation: env-scroll-rev 30s linear infinite;
}
.hw-scroll-fore {
  height: clamp(85px, 12vh, 150px);
  animation: env-scroll-fwd 18s linear infinite;
}

@keyframes env-scroll-fwd {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@keyframes env-scroll-rev {
  from { transform: translateX(-50%); }
  to   { transform: translateX(0); }
}

/* Asymmetrical Lush Cartoon Forest Trees */
.hw-forest-trees {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  pointer-events: none;
}
.hw-forest-tree {
  position: absolute;
  bottom: 0;
  filter: drop-shadow(0 6px 12px rgba(10, 10, 10, 0.08));
}
.hw-forest-tree svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}
.hw-tree-left {
  left: -15px;
  bottom: 0;
  width: clamp(160px, 20vw, 290px);
}
.hw-tree-right-mid {
  right: 95px;
  bottom: 12px;
  width: clamp(90px, 11vw, 150px);
  opacity: 0.88;
}
.hw-tree-right-fore {
  right: 15px;
  bottom: 0;
  width: clamp(110px, 13vw, 180px);
}

.hw-tree-trunk {
  transform: none !important;
}

/* Tree Crown Organic Canopy Breeze */
.hw-tree-crown {
  transform-box: fill-box;
  transform-origin: 50% 85%;
}
.hw-crown-left {
  animation: tree-canopy-sway-left 5.8s ease-in-out infinite alternate;
}
.hw-crown-right-mid {
  animation: tree-canopy-sway-right 7.2s ease-in-out infinite alternate 1.2s;
}
.hw-crown-right-fore {
  animation: tree-canopy-sway-right 6.2s ease-in-out infinite alternate 0.4s;
}

@keyframes tree-canopy-sway-left {
  0%   { transform: rotate(-2.5deg) scale(1, 1); }
  50%  { transform: rotate(2deg) scale(1.02, 0.99); }
  100% { transform: rotate(-1.8deg) scale(0.99, 1.01); }
}

@keyframes tree-canopy-sway-right {
  0%   { transform: rotate(2.5deg) scale(1, 1); }
  50%  { transform: rotate(-2deg) scale(1.02, 0.99); }
  100% { transform: rotate(1.8deg) scale(0.99, 1.01); }
}

/* Falling / Swirling Forest Leaves */
.hw-leaves {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  overflow: hidden;
}
.hw-leaf {
  position: absolute;
  display: block;
  width: 16px;
  height: 20px;
}
.hw-leaf svg {
  width: 100%;
  height: 100%;
}
.hw-leaf-1 { top: -20px; left: 8%;  animation: leaf-fall-1 8.5s ease-in infinite 0s; }
.hw-leaf-2 { top: -20px; left: 18%; animation: leaf-fall-2 11s  ease-in infinite 1.8s; }
.hw-leaf-3 { top: -20px; left: 28%; animation: leaf-fall-3 9.5s ease-in infinite 3.2s; }
.hw-leaf-4 { top: -20px; left: 40%; animation: leaf-fall-1 12.5s ease-in infinite 0.5s; }
.hw-leaf-5 { top: -20px; left: 52%; animation: leaf-fall-2 8s   ease-in infinite 4.2s; }
.hw-leaf-6 { top: -20px; left: 65%; animation: leaf-fall-3 10.5s ease-in infinite 2s; }
.hw-leaf-7 { top: -20px; left: 78%; animation: leaf-fall-1 9s   ease-in infinite 5.5s; }
.hw-leaf-8 { top: -20px; left: 88%; animation: leaf-fall-2 8.5s ease-in infinite 1.2s; }

@keyframes leaf-fall-1 {
  0%   { transform: translate(0, -20px) rotate(0deg); opacity: 0; }
  6%   { opacity: 0.95; }
  100% { transform: translate(50px, 105vh) rotate(380deg); opacity: 0; }
}
@keyframes leaf-fall-2 {
  0%   { transform: translate(0, -20px) rotate(0deg); opacity: 0; }
  6%   { opacity: 0.95; }
  100% { transform: translate(-60px, 105vh) rotate(-340deg); opacity: 0; }
}
@keyframes leaf-fall-3 {
  0%   { transform: translate(0, -20px) rotate(0deg); opacity: 0; }
  6%   { opacity: 0.95; }
  100% { transform: translate(35px, 105vh) rotate(440deg); opacity: 0; }
}

/* Foreground Wildflowers & Grass (Full-Width Bottom Strip) */
.hw-flowers {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3;
  pointer-events: none;
  transform-origin: bottom center;
  animation: flower-sway 4s ease-in-out infinite alternate;
}
.hw-flower-strip {
  width: 100%;
  height: clamp(40px, 5.5vh, 70px);
  display: block;
}

@keyframes flower-sway {
  0%   { transform: skewX(0deg); }
  50%  { transform: skewX(1deg); }
  100% { transform: skewX(-0.8deg); }
}

/* Pulsing Spores */
.hw-nodes {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.hw-node {
  position: absolute;
  border-radius: 50%;
  border: 2px solid var(--ink);
}
.hw-node-blue   { background: var(--blue);   width: 14px; height: 14px; top: 48%; left: 18%;  animation: node-pulse 3.2s ease-in-out infinite; }
.hw-node-red    { background: var(--red);    width: 12px; height: 12px; top: 54%; right: 24%; animation: node-pulse 4.7s ease-in-out infinite 0.8s; }
.hw-node-yellow { background: var(--yellow); width: 16px; height: 16px; top: 44%; left: 54%;  animation: node-pulse 3.9s ease-in-out infinite 1.5s; }
.hw-node-green  { background: var(--green);  width: 18px; height: 18px; top: 50%; right: 40%; animation: node-pulse 5.3s ease-in-out infinite 0.3s; }

@keyframes node-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(1.5); opacity: 0.5; }
}

/* =============================================================
   S3-STYLE MARQUEE TICKER BANNER
   ============================================================= */
.marquee-banner {
  background: var(--yellow);
  border-top: var(--border-ink);
  border-bottom: var(--border-ink);
  padding: 12px 0;
  overflow: hidden;
  white-space: nowrap;
  font: 900 13px var(--mono);
  letter-spacing: var(--tracking-wider);
  color: var(--ink);
  box-shadow: 0 4px 0 var(--ink);
  position: relative;
  z-index: var(--z-raised);
}
.marquee-track {
  display: inline-flex;
  gap: 28px;
  animation: marquee-scroll 24s linear infinite;
  width: max-content;
}
.marquee-track span {
  display: inline-block;
}
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* =============================================================
   HERO CONTENT STAGE (VIEWPORT-FITTED & IMPACTFUL)
   ============================================================= */
.hero-stage {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  flex: 1;
  padding: clamp(62px, 8.5vh, 86px) var(--section-x) clamp(8px, 1.2vh, 16px);
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
}

/* Hero Heading Wrapper & Pop-Out Orbital Composition */
.hero-heading-wrap {
  position: relative;
  display: inline-block;
  width: 100%;
  max-width: 960px;
}

.popout-orbit-container {
  position: absolute;
  inset: -20px -40px;
  pointer-events: none;
  z-index: 4;
}

.popout-item {
  position: absolute;
  pointer-events: auto;
  cursor: default;
  opacity: 0;
  will-change: transform, opacity;
  user-select: none;
}

.popout-art {
  display: block;
  filter: drop-shadow(3px 3px 0 var(--ink));
  transition: transform 0.25s var(--ease-spring), filter 0.25s var(--ease-spring);
}
.popout-item:hover .popout-art {
  transform: scale(1.2) rotate(6deg);
  filter: drop-shadow(5px 5px 0 var(--ink));
}

/* Individual Popout Burst-Out Placement & Continuous Orbital Motion */
.popout-bulb {
  top: -16px;
  left: clamp(-10px, 3.5vw, 40px);
  width: clamp(38px, 4.5vw, 54px);
  animation:
    popout-burst-1 0.75s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s forwards,
    popout-orbit-1 6.5s ease-in-out 1.1s infinite alternate;
}
.popout-puzzle {
  top: 36%;
  left: clamp(-28px, -1.8vw, 12px);
  width: clamp(42px, 4.8vw, 58px);
  animation:
    popout-burst-3 0.75s cubic-bezier(0.34, 1.56, 0.64, 1) 0.5s forwards,
    popout-orbit-3 5.8s ease-in-out 1.3s infinite alternate;
}
.popout-team {
  bottom: -14px;
  left: clamp(-6px, 3.5vw, 45px);
  width: clamp(46px, 5.2vw, 64px);
  animation:
    popout-burst-6 0.75s cubic-bezier(0.34, 1.56, 0.64, 1) 0.7s forwards,
    popout-orbit-6 7.5s ease-in-out 1.5s infinite alternate;
}

.popout-rocket {
  top: -16px;
  right: clamp(-10px, 3.5vw, 40px);
  width: clamp(40px, 4.6vw, 56px);
  animation:
    popout-burst-2 0.75s cubic-bezier(0.34, 1.56, 0.64, 1) 0.4s forwards,
    popout-orbit-2 7.2s ease-in-out 1.2s infinite alternate;
}
.popout-target {
  top: 36%;
  right: clamp(-28px, -1.8vw, 12px);
  width: clamp(40px, 4.6vw, 56px);
  animation:
    popout-burst-5 0.75s cubic-bezier(0.34, 1.56, 0.64, 1) 0.6s forwards,
    popout-orbit-5 6.2s ease-in-out 1.4s infinite alternate;
}
.popout-laptop {
  bottom: -14px;
  right: clamp(-6px, 3.5vw, 45px);
  width: clamp(44px, 5vw, 60px);
  animation:
    popout-burst-4 0.75s cubic-bezier(0.34, 1.56, 0.64, 1) 0.8s forwards,
    popout-orbit-4 6.8s ease-in-out 1.6s infinite alternate;
}

.popout-sparkle-1 {
  top: 10%;
  left: 20%;
  width: 20px;
  animation: popout-burst-1 0.75s cubic-bezier(0.34, 1.56, 0.64, 1) 0.9s forwards, popout-orbit-3 4.5s ease-in-out 1.7s infinite alternate;
}
.popout-sparkle-2 {
  bottom: 12%;
  right: 22%;
  width: 20px;
  animation: popout-burst-2 0.75s cubic-bezier(0.34, 1.56, 0.64, 1) 1s forwards, popout-orbit-6 4.5s ease-in-out 1.8s infinite alternate;
}
.popout-sparkle-svg {
  display: block;
  width: 100%;
  height: auto;
  filter: drop-shadow(1.5px 1.5px 0 var(--ink));
}

/* Burst-Out Intro Keyframes (Explosive Pop Outward from Center) */
@keyframes popout-burst-1 {
  0%   { opacity: 0; transform: translate(40px, 30px) scale(0) rotate(-15deg); }
  70%  { opacity: 1; transform: translate(-4px, -4px) scale(1.15) rotate(4deg); }
  100% { opacity: 1; transform: translate(0, 0) scale(1) rotate(-3deg); }
}
@keyframes popout-burst-2 {
  0%   { opacity: 0; transform: translate(-40px, 30px) scale(0) rotate(15deg); }
  70%  { opacity: 1; transform: translate(4px, -4px) scale(1.15) rotate(-4deg); }
  100% { opacity: 1; transform: translate(0, 0) scale(1) rotate(3deg); }
}
@keyframes popout-burst-3 {
  0%   { opacity: 0; transform: translate(30px, 0) scale(0) rotate(-45deg); }
  70%  { opacity: 1; transform: translate(-6px, 0) scale(1.2) rotate(15deg); }
  100% { opacity: 1; transform: translate(0, 0) scale(1) rotate(0deg); }
}
@keyframes popout-burst-4 {
  0%   { opacity: 0; transform: translate(-30px, -30px) scale(0) rotate(20deg); }
  70%  { opacity: 1; transform: translate(4px, 4px) scale(1.15) rotate(-3deg); }
  100% { opacity: 1; transform: translate(0, 0) scale(1) rotate(2deg); }
}
@keyframes popout-burst-5 {
  0%   { opacity: 0; transform: translate(-30px, 0) scale(0) rotate(30deg); }
  70%  { opacity: 1; transform: translate(6px, 0) scale(1.15) rotate(-5deg); }
  100% { opacity: 1; transform: translate(0, 0) scale(1) rotate(2deg); }
}
@keyframes popout-burst-6 {
  0%   { opacity: 0; transform: translate(30px, -30px) scale(0) rotate(-45deg); }
  70%  { opacity: 1; transform: translate(-4px, 4px) scale(1.2) rotate(15deg); }
  100% { opacity: 1; transform: translate(0, 0) scale(1) rotate(0deg); }
}

/* Continuous Orbital Floating Keyframes */
@keyframes popout-orbit-1 {
  0%   { transform: translate(0, 0) rotate(-3deg); }
  50%  { transform: translate(6px, -10px) rotate(2deg); }
  100% { transform: translate(-6px, 6px) rotate(-4deg); }
}
@keyframes popout-orbit-2 {
  0%   { transform: translate(0, 0) rotate(3deg); }
  50%  { transform: translate(-8px, -8px) rotate(-2deg); }
  100% { transform: translate(6px, 7px) rotate(4deg); }
}
@keyframes popout-orbit-3 {
  0%   { transform: translate(0, 0) rotate(0deg); }
  50%  { transform: translate(6px, 8px) rotate(18deg) scale(1.08); }
  100% { transform: translate(-6px, -6px) rotate(-12deg) scale(0.95); }
}
@keyframes popout-orbit-4 {
  0%   { transform: translate(0, 0) rotate(2deg); }
  50%  { transform: translate(8px, 6px) rotate(-2deg); }
  100% { transform: translate(-6px, -8px) rotate(3deg); }
}
@keyframes popout-orbit-5 {
  0%   { transform: translate(0, 0) rotate(2deg); }
  50%  { transform: translate(-6px, 9px) rotate(-3deg); }
  100% { transform: translate(5px, -7px) rotate(3deg); }
}
@keyframes popout-orbit-6 {
  0%   { transform: translate(0, 0) rotate(0deg); }
  50%  { transform: translate(6px, -6px) rotate(-15deg) scale(1.08); }
  100% { transform: translate(-5px, 8px) rotate(12deg) scale(0.95); }
}

/* HERO TITLE — IMPACTFUL (HACK WITH GDG S4) */
.hero-stage h1 {
  font: 900 clamp(4.6rem, 11vw, 9.6rem) / 0.86 var(--display);
  letter-spacing: -0.05em;
  margin: 0 0 clamp(6px, 1vh, 12px);
  color: var(--ink);
}
.h1-line {
  display: block;
}
.h1-line-1 {
  color: var(--ink);
}
.h1-line-2 {
  display: inline-flex;
  align-items: baseline;
  justify-content: center;
  gap: 0;
}
.h1-g { color: var(--blue); }
.h1-d { color: var(--red); }
.h1-g2 { color: var(--yellow-dark); }
.h1-s4 { color: var(--green); margin-left: clamp(10px, 1.8vw, 24px); }

.hero-lede {
  font: 700 clamp(1.1rem, 1.7vw, 1.55rem) / 1.25 var(--display);
  color: var(--ink);
  max-width: 640px;
  margin-bottom: clamp(10px, 1.5vh, 18px);
}

/* Date Highlight Card (Neo-Brutalist Sticker Card) */
.hero-stats {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: clamp(10px, 1.5vh, 18px);
  border: 2.5px solid var(--ink);
  background: var(--surface);
  box-shadow: 4px 4px 0 var(--ink);
  border-radius: 6px;
  overflow: hidden;
}
.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: clamp(6px, 0.9vh, 10px) clamp(20px, 3vw, 38px);
}
.stat-val {
  font: 900 clamp(1.3rem, 2.2vw, 2.1rem) / 1 var(--display);
  letter-spacing: 0.02em;
  color: var(--ink);
}
.stat-label {
  font: 800 clamp(9px, 0.95vw, 11px) var(--mono);
  letter-spacing: 0.12em;
  color: var(--green-dark);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(10px, 1.5vw, 18px);
  flex-wrap: wrap;
}
.hero-actions .button {
  padding: clamp(11px, 1.4vh, 15px) clamp(22px, 2.5vw, 36px);
  font: 800 clamp(11.5px, 1.15vw, 13.5px) var(--mono);
  letter-spacing: 0.06em;
  border-width: 2.5px;
}

/* =============================================================
   STANDARDIZED SECTION TYPOGRAPHY (CRISP & BALANCED)
   ============================================================= */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 700 11px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: clamp(6px, 1vh, 12px);
}
.eyebrow-rule {
  display: inline-block;
  width: 14px;
  height: 2px;
  background: var(--green);
}

section h2,
.section-intro h2,
.foundation-copy h2,
.innovation-head h2,
.tl-head h2,
.exp-head h2,
.rewards-head h2,
.organizers h2,
.sponsors h2,
.venue h2,
.faq h2,
.archives h2,
.devfolio h2,
.register h2 {
  font: 900 clamp(1.85rem, 3.2vw, 2.75rem) / 1.08 var(--display);
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: clamp(10px, 1.5vh, 18px);
}

section h2 em,
.section-intro h2 em,
.foundation-copy h2 em,
.innovation-head h2 em,
.tl-head h2 em,
.exp-head h2 em,
.rewards-head h2 em {
  font-style: normal;
  color: var(--green);
}

/* =============================================================
   COUNTDOWN SECTION (PRECISION DIGITS — BALANCED PROPORTIONS)
   ============================================================= */
.countdown-section {
  border-bottom: var(--border-ink);
  position: relative;
  background: var(--paper);
}
.countdown-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--green) 0%, var(--blue) 33%, var(--red) 66%, var(--yellow) 100%);
}
.countdown-heading {
  margin-bottom: clamp(20px, 3vh, 32px);
}
.countdown-state {
  font: 900 clamp(1.65rem, 2.8vw, 2.4rem) / 1.1 var(--display);
  letter-spacing: -0.025em;
  margin-top: var(--sp-2);
  color: var(--ink);
}
.countdown-section[data-state="before"] .countdown-state { color: var(--green); }
.countdown-section[data-state="during"] .countdown-state { color: var(--green); }
.countdown-section[data-state="after"]  .countdown-state { color: var(--muted); }

/* Digits row with ample space for all two-digit slots */
.countdown-digits {
  display: flex;
  align-items: flex-end;
  gap: clamp(12px, 2.2vw, 28px);
  flex-wrap: wrap;
  overflow: visible;
}
.cd-sep {
  font: 800 clamp(2.2rem, 4.5vw, 3.8rem) / 1 var(--display);
  letter-spacing: -0.04em;
  color: var(--gray-300);
  padding-bottom: clamp(12px, 2vw, 20px);
  user-select: none;
  flex-shrink: 0;
}
.cd-unit {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  flex-shrink: 0;
}
.cd-unit small {
  font: 700 10.5px var(--mono);
  letter-spacing: 0.1em;
  color: var(--muted);
}
/* Generous slot dimensions guaranteeing complete number visibility */
.cd-slot {
  position: relative;
  height: clamp(3.2rem, 6.5vw, 5.4rem);
  min-width: clamp(4rem, 8vw, 6.6rem);
  flex-shrink: 0;
  overflow: visible;
}
.cd-cur, .cd-next {
  display: block;
  font: 900 clamp(2.8rem, 6.2vw, 5rem) / 1.05 var(--display);
  letter-spacing: -0.045em;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  text-align: left;
  white-space: nowrap;
}
[data-cd-unit="days"]    .cd-cur, [data-cd-unit="days"]    .cd-next { color: var(--green); }
[data-cd-unit="hours"]   .cd-cur, [data-cd-unit="hours"]   .cd-next { color: var(--blue); }
[data-cd-unit="minutes"] .cd-cur, [data-cd-unit="minutes"] .cd-next { color: var(--red); }
[data-cd-unit="seconds"] .cd-cur, [data-cd-unit="seconds"] .cd-next { color: var(--yellow-dark); }

@keyframes cd-flip-out {
  from { transform: translateY(0);    opacity: 1; }
  to   { transform: translateY(-38%); opacity: 0; }
}
@keyframes cd-flip-in {
  from { transform: translateY(38%);  opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}
.cd-slot.flipping .cd-cur  { animation: cd-flip-out var(--dur-base) var(--ease-accelerate) forwards; }
.cd-slot.flipping .cd-next { animation: cd-flip-in  var(--dur-base) var(--ease-decelerate) forwards; }
.countdown-section[data-state="after"] .countdown-digits { display: none; }

.cd-sr-summary {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* =============================================================
   02 / FOUNDATION (ABOUT) & PROGRESSION TRACK
   ============================================================= */
.foundation {
  border-bottom: var(--border-ink);
}
.foundation-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
.foundation-text {
  margin-top: var(--sp-4);
}
.big-copy {
  font: 700 clamp(1.08rem, 1.55vw, 1.4rem) / 1.45 var(--body);
  letter-spacing: -0.015em;
  color: var(--ink);
  max-width: 580px;
  margin-bottom: 12px;
}
.about-support {
  font: 400 14px / 1.55 var(--body);
  color: var(--gray-600);
  max-width: 520px;
  margin-bottom: 16px;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.principle-card {
  background: var(--surface);
  border: var(--border-card);
  box-shadow: var(--shadow-hard-sm);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.principle-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}
.principle-num {
  font: 700 10px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
}
.principle-card h3 {
  font: 800 clamp(1.05rem, 1.25vw, 1.25rem) var(--display);
  letter-spacing: -0.01em;
  margin: 4px 0 2px;
}
.principle-card h3.accent-blue   { color: var(--blue); }
.principle-card h3.accent-red    { color: var(--red); }
.principle-card h3.accent-yellow { color: var(--yellow-dark); }
.principle-card h3.accent-green  { color: var(--green); }
.principle-card p {
  font: 400 13px / 1.45 var(--body);
  color: var(--gray-600);
}
.principle-card::before {
  content: '';
  display: block;
  height: 3.5px;
  width: 28px;
  margin-bottom: 4px;
  background: var(--line);
  transition: width var(--dur-slow) var(--ease-decelerate);
}
.principle-card.accent-blue::before   { background: var(--blue); }
.principle-card.accent-red::before    { background: var(--red); }
.principle-card.accent-yellow::before { background: var(--yellow); }
.principle-card.accent-green::before  { background: var(--green); }
.principle-card.visible-accent::before { width: 100%; }

/* Quick Event Facts Card (Neo-Brutalist White Pill/Box) */
.about-facts-card {
  background: var(--surface);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
  border-radius: var(--radius-sm);
  padding: var(--sp-4) var(--sp-5);
  margin: var(--sp-4) 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.about-fact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font: 500 14px / 1.4 var(--body);
  color: var(--ink);
}
.fact-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--ink);
  flex-shrink: 0;
}
.fact-dot-blue   { background: var(--blue); }
.fact-dot-red    { background: var(--red); }
.fact-dot-yellow { background: var(--yellow-dark); }
.fact-dot-green  { background: var(--green); }
.fact-detail {
  color: var(--muted);
  font-size: 13px;
  margin-left: 4px;
}

/* Polaroid Photo Frame Collage (Inspired by S3 Reference) */
.polaroid-collage {
  position: relative;
  width: 100%;
  max-width: 520px;
  min-height: 350px;
  margin-bottom: var(--sp-4);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.polaroid-card {
  position: relative;
  background: #FFFFFF;
  border: 2.5px solid var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
  border-radius: 4px;
  padding: 10px 10px 12px 10px;
  transition: transform 0.25s var(--ease-spring), box-shadow 0.25s var(--ease-spring), z-index 0s;
  cursor: pointer;
}
.polaroid-card:hover {
  transform: scale(1.06) rotate(0deg) !important;
  box-shadow: 7px 7px 0 var(--ink);
  z-index: 10;
}
.polaroid-1 {
  transform: rotate(-3deg);
  grid-column: 1;
}
.polaroid-2 {
  transform: rotate(3deg);
  grid-column: 2;
  margin-top: 14px;
}
.polaroid-3 {
  transform: rotate(-1.5deg);
  grid-column: 1 / span 2;
  max-width: 320px;
  margin: -10px auto 0;
}

/* Washi Tape / Masking Tape Sticker */
.washi-tape {
  position: absolute;
  top: -9px;
  left: 50%;
  transform: translateX(-50%) rotate(-1.5deg);
  width: 60px;
  height: 16px;
  background: #FBBC04;
  opacity: 0.88;
  border: 1px solid rgba(0, 0, 0, 0.25);
  box-shadow: 0 1px 2px rgba(0,0,0,0.15);
  z-index: 2;
}

.polaroid-img-box {
  width: 100%;
  height: 170px;
  background: #E8F0FE;
  border: 1.5px solid var(--ink);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 6px;
}
.polaroid-img-1 {
  background: url('images/hackathon-glimpse-2.jpg') center 20%/cover no-repeat;
}
.polaroid-img-2 {
  background: url('images/hackathon-glimpse-1.jpg') center 25%/cover no-repeat;
}
.polaroid-img-3 {
  background: url('images/hackathon-glimpse-3.jpg') center 30%/cover no-repeat;
}

.polaroid-tag {
  font: 800 8.5px var(--mono);
  letter-spacing: 0.05em;
  background: #0a0a0a;
  color: #FFFFFF;
  padding: 2px 5px;
  border-radius: 2px;
}

.polaroid-caption {
  font: 700 11px / 1.25 var(--mono);
  color: var(--ink);
  margin: 8px 0 0;
  text-align: center;
  letter-spacing: 0.02em;
}

/* Progression Graphic */
.foundation-graphic {
  position: sticky;
  top: calc(70px + var(--sp-8));
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-5);
  padding-top: 0;
}
.prog-label {
  font: 700 11px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
}
.prog-track {
  display: flex;
  flex-direction: column;
  gap: 0;
  width: 100%;
}
.prog-step {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.prog-node {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6);
  border: var(--border-card);
  box-shadow: var(--shadow-hard-sm);
  width: 100%;
  background: var(--surface);
  transition: border-color var(--dur-slow) var(--ease-standard), background var(--dur-slow) var(--ease-standard);
}
.prog-node span {
  font: 800 clamp(1.4rem, 2.5vw, 2.2rem) / 1 var(--display);
  letter-spacing: var(--tracking-tight);
  color: var(--muted);
  transition: color var(--dur-slow) var(--ease-standard);
}
.prog-node::before {
  content: '';
  display: block;
  width: 12px; height: 12px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
  background: var(--line);
  transition: background var(--dur-slow) var(--ease-standard);
}
.prog-node-blue::before   { background: var(--blue); }
.prog-node-red::before    { background: var(--red); }
.prog-node-yellow::before { background: var(--yellow); }
.prog-node-green::before  { background: var(--green); }
.prog-node-blue.prog-active   { border-color: var(--blue);   background: var(--blue-light); }
.prog-node-red.prog-active    { border-color: var(--red);    background: var(--red-light); }
.prog-node-yellow.prog-active { border-color: var(--yellow); background: var(--yellow-light); }
.prog-node-green.prog-active  { border-color: var(--green);  background: var(--green-light); }
.prog-node.prog-active span   { color: var(--ink); }

.prog-connector {
  width: 2px;
  height: var(--sp-5);
  margin-left: calc(var(--sp-6) + 5px);
  overflow: hidden;
}
.prog-line {
  display: block;
  width: 2px; height: 100%;
  background: var(--ink);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur-slow) var(--ease-decelerate);
}
.prog-step.prog-connected .prog-line {
  transform: scaleY(1);
}

/* =============================================================
   03 / OPEN INNOVATION
   ============================================================= */
.innovation {
  border-bottom: var(--border-ink);
}
.innovation-head {
  margin-bottom: var(--sp-5);
}
.open-innovation-card {
  background: var(--surface);
  border: 2.5px solid var(--ink);
  box-shadow: 6px 6px 0 var(--ink);
  border-radius: var(--radius-sm);
  padding: clamp(20px, 3.5vw, 36px);
  margin-top: var(--sp-3);
  transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.open-innovation-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 var(--ink);
}
.oi-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: var(--sp-3);
  flex-wrap: wrap;
}
.oi-badge-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.oi-badge-theme {
  font: 800 11px var(--mono);
  letter-spacing: var(--tracking-widest);
  padding: 4px 10px;
  background: #FFF8E1;
  color: #B06000;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  box-shadow: 2px 2px 0 var(--ink);
}
.oi-badge-accent {
  font: 800 12px var(--mono);
  letter-spacing: var(--tracking-wide);
  padding: 4px 12px;
  background: #E6F4EA;
  color: #137333;
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  box-shadow: 2px 2px 0 var(--ink);
}
.oi-bulb-icon {
  width: 40px;
  height: 40px;
  filter: drop-shadow(2px 2px 0 var(--ink));
}
.oi-bulb-svg {
  display: block;
  width: 100%;
  height: 100%;
}
.oi-main-title {
  font: 900 clamp(1.45rem, 2.5vw, 2.1rem) / 1.15 var(--display);
  letter-spacing: var(--tracking-tight);
  color: var(--ink);
  margin-bottom: var(--sp-3);
}
.innovation-disclaimer {
  font: 500 14.5px / var(--leading-loose) var(--body);
  color: var(--ink);
  max-width: 800px;
  margin-bottom: var(--sp-4);
  padding: var(--sp-3) var(--sp-5);
  border: var(--border-card);
  border-left-width: 6px;
  border-left-color: var(--green);
  background: var(--green-light);
  box-shadow: var(--shadow-hard-sm);
}
.domain-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}
.oi-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: var(--sp-4);
}
.oi-feature-box {
  background: #FAFAFA;
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  border-radius: var(--radius-sm);
  padding: var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform var(--dur-fast) var(--ease-spring), box-shadow var(--dur-fast) var(--ease-spring);
}
.oi-feature-box:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--ink);
}
.oi-box-blue   { border-top: 5px solid var(--blue); }
.oi-box-green  { border-top: 5px solid var(--green); }
.oi-box-yellow { border-top: 5px solid var(--yellow-dark); }
.oi-box-red    { border-top: 5px solid var(--red); }
.oi-feat-icon {
  font-size: 20px;
  line-height: 1;
}
.oi-feature-box h4 {
  font: 800 15px var(--display);
  letter-spacing: var(--tracking-snug);
  color: var(--ink);
  margin: 0;
}
.oi-feature-box p {
  font: 400 13px / 1.5 var(--body);
  color: var(--gray-600);
  margin: 0;
}
.domain-tag {
  font: 700 12px var(--mono);
  letter-spacing: var(--tracking-wide);
  border: var(--border-card);
  padding: 10px 20px;
  color: var(--ink);
  background: var(--surface);
  box-shadow: var(--shadow-hard-sm);
  cursor: default;
  transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard), background var(--dur-fast) var(--ease-standard);
}
.domain-tag:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
  background: var(--green-light);
  border-color: var(--green-dark);
}
.domain-tag[data-color="blue"]:hover   { background: var(--blue-light);   border-color: var(--blue); }
.domain-tag[data-color="green"]:hover  { background: var(--green-light);  border-color: var(--green); }
.domain-tag[data-color="yellow"]:hover { background: var(--yellow-light); border-color: var(--yellow-dark); }
.domain-tag[data-color="red"]:hover    { background: var(--red-light);    border-color: var(--red); }

/* =============================================================
   04 / THE JOURNEY
   ============================================================= */
.journey {
  border-bottom: var(--border-ink);
}
.rounds {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 18px;
}
.round-card {
  background: var(--surface);
  border: var(--border-card);
  box-shadow: var(--shadow-hard);
  padding: clamp(20px, 3vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 5px solid var(--ink);
  transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.round-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-lg);
}
.round-card.round-blue { border-top-color: var(--blue); }
.round-card.round-red  { border-top-color: var(--red); }
.round-index {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
}
.round-card h3 {
  font: 900 clamp(1.35rem, 2.2vw, 1.85rem) / 1.1 var(--display);
  letter-spacing: -0.02em;
}
.round-card.round-blue h3 { color: var(--blue); }
.round-card.round-red  h3 { color: var(--red); }
.round-tagline {
  font: 700 13.5px / var(--leading-normal) var(--display);
  color: var(--ink);
}
.round-card p {
  font: 400 13px / 1.5 var(--body);
  color: var(--gray-600);
}
.round-meta {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
  margin-top: 4px;
}
.round-deadline {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--blue);
}
.round-card.round-red .round-deadline { color: var(--red); }
.round-note {
  font: 500 12px / 1.45 var(--body);
  color: var(--muted);
  border-top: 1px dashed var(--line);
  padding-top: 8px;
  margin-top: 4px;
}

/* Connected Stage Rail */
.stage-rail-wrap {
  margin-top: 24px;
  padding: 16px var(--sp-6);
  border: var(--border-card);
  box-shadow: var(--shadow-hard-sm);
  background: var(--surface);
  overflow-x: auto;
}
.stage-rail {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  min-width: 480px;
}
.stage-rail::before {
  content: '';
  position: absolute;
  top: 50%; left: 24px; right: 24px;
  height: 2px;
  background: var(--line);
  transform: translateY(-50%);
  z-index: 0;
}
.stage-rail::after {
  content: '';
  position: absolute;
  top: 50%; left: 24px;
  width: 0;
  height: 2.5px;
  background: linear-gradient(90deg, var(--blue) 0% 33%, var(--red) 33% 66%, var(--yellow) 66% 100%);
  transform: translateY(-50%);
  transition: width 800ms var(--ease-decelerate);
  z-index: 1;
}
.stage-rail.rail-filled::after {
  width: calc(100% - 48px);
}
.stage-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 0 8px;
  position: relative;
  z-index: 2;
}
.stage-node {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  border: var(--border-card);
  box-shadow: var(--shadow-hard-sm);
  background: var(--surface);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  transition: border-color var(--dur-slow) var(--ease-standard), background var(--dur-slow) var(--ease-standard);
}
.stage-node::before {
  content: '';
  width: 10px; height: 10px;
  border-radius: var(--radius-full);
  background: var(--line);
  transition: background var(--dur-slow) var(--ease-standard), transform var(--dur-slow) var(--ease-spring);
}
.stage-item.stage-active[data-color="blue"]   .stage-node { border-color: var(--blue);   background: var(--blue-light); }
.stage-item.stage-active[data-color="red"]    .stage-node { border-color: var(--red);    background: var(--red-light); }
.stage-item.stage-active[data-color="yellow"] .stage-node { border-color: var(--yellow); background: var(--yellow-light); }
.stage-item.stage-active[data-color="green"]  .stage-node { border-color: var(--green);  background: var(--green-light); }
.stage-item.stage-active[data-color="blue"]   .stage-node::before { background: var(--blue);   transform: scale(1.2); }
.stage-item.stage-active[data-color="red"]    .stage-node::before { background: var(--red);    transform: scale(1.2); }
.stage-item.stage-active[data-color="yellow"] .stage-node::before { background: var(--yellow); transform: scale(1.2); }
.stage-item.stage-active[data-color="green"]  .stage-node::before { background: var(--green);  transform: scale(1.2); }
.stage-label {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
  white-space: nowrap;
}
.stage-item.stage-active .stage-label {
  color: var(--ink);
}

/* =============================================================
   05 / THE ROAD AHEAD (TIMELINE)
   ============================================================= */
.timeline {
  border-bottom: var(--border-ink);
}
.tl-head {
  margin-bottom: 20px;
}
.tl-desktop {
  position: relative;
  margin-bottom: 24px;
  display: block;
}
.tl-track-line {
  position: absolute;
  top: 24px; left: 0; right: 0;
  height: 2px;
  background: var(--line);
  z-index: 0;
}
.tl-track-line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--blue) 0% 25%, var(--red) 25% 50%, var(--yellow) 50% 75%, var(--green) 75% 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 900ms var(--ease-decelerate);
}
.tl-desktop.tl-line-drawn .tl-track-line::after {
  transform: scaleX(1);
}
.tl-entries-h {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
  z-index: 1;
}
.tl-entry-h {
  background: var(--surface);
  border: var(--border-card);
  box-shadow: var(--shadow-hard-sm);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.tl-entry-h:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}
.tl-node {
  width: 44px; height: 44px;
  border-radius: var(--radius-full);
  border: var(--border-card);
  background: var(--paper);
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  flex-shrink: 0;
}
.tl-node-inner {
  width: 12px; height: 12px;
  border-radius: var(--radius-full);
  background: var(--line);
}
.tl-entry-h[data-color="blue"]   .tl-node { border-color: var(--blue);   background: var(--blue-light); }
.tl-entry-h[data-color="red"]    .tl-node { border-color: var(--red);    background: var(--red-light); }
.tl-entry-h[data-color="yellow"] .tl-node { border-color: var(--yellow); background: var(--yellow-light); }
.tl-entry-h[data-color="green"]  .tl-node { border-color: var(--green);  background: var(--green-light); }
.tl-entry-h[data-color="blue"]   .tl-node-inner { background: var(--blue); }
.tl-entry-h[data-color="red"]    .tl-node-inner { background: var(--red); }
.tl-entry-h[data-color="yellow"] .tl-node-inner { background: var(--yellow); }
.tl-entry-h[data-color="green"]  .tl-node-inner { background: var(--green); }

.tl-entry-date {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
  margin-bottom: 4px;
}
.tl-entry-h[data-color="blue"]   .tl-entry-date { color: var(--blue); }
.tl-entry-h[data-color="red"]    .tl-entry-date { color: var(--red); }
.tl-entry-h[data-color="yellow"] .tl-entry-date { color: var(--yellow-dark); }
.tl-entry-h[data-color="green"]  .tl-entry-date { color: var(--green-dark); }
.tl-entry-title {
  font: 800 clamp(0.92rem, 1.2vw, 1.12rem) / 1.25 var(--display);
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.tl-entry-sub {
  font: 400 12.5px / 1.45 var(--body);
  color: var(--gray-600);
}
.tl-entry-idx {
  font: 700 10px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
  margin-bottom: 2px;
}

/* Mobile Vertical Timeline */
.tl-entries-v {
  list-style: none;
  display: none;
  flex-direction: column;
  position: relative;
  padding-left: 48px;
}
.tl-entries-v::before {
  content: '';
  position: absolute;
  left: 18px; top: 8px; bottom: 8px;
  width: 2px;
  background: var(--line);
}
.tl-entry-v {
  position: relative;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.tl-entry-v::before {
  content: '';
  position: absolute;
  left: -37px; top: 18px;
  width: 14px; height: 14px;
  border-radius: var(--radius-full);
  border: var(--border-card);
  background: var(--surface);
}
.tl-entry-v[data-color="blue"]::before   { background: var(--blue);   border-color: var(--blue-dark); }
.tl-entry-v[data-color="red"]::before    { background: var(--red);    border-color: var(--red-dark); }
.tl-entry-v[data-color="yellow"]::before { background: var(--yellow); border-color: var(--yellow-dark); }
.tl-entry-v[data-color="green"]::before  { background: var(--green);  border-color: var(--green-dark); }
.tl-v-date {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  display: block;
  margin-bottom: 2px;
}
.tl-entry-v[data-color="blue"]   .tl-v-date { color: var(--blue); }
.tl-entry-v[data-color="red"]    .tl-v-date { color: var(--red); }
.tl-entry-v[data-color="yellow"] .tl-v-date { color: var(--yellow-dark); }
.tl-entry-v[data-color="green"]  .tl-v-date { color: var(--green-dark); }
.tl-v-title {
  font: 800 clamp(1rem, 2.8vw, 1.25rem) / 1.25 var(--display);
  letter-spacing: -0.01em;
  margin-bottom: 2px;
}
.tl-v-sub {
  font: 400 13px / 1.45 var(--body);
  color: var(--gray-600);
}
.tl-soon {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
  margin-top: 20px;
  padding: 8px 16px;
  border: var(--border-card);
  background: var(--surface);
  display: inline-block;
}

/* =============================================================
   06 / MORE THAN A HACKATHON (EXPERIENCE)
   ============================================================= */
.experience {
  border-bottom: var(--border-ink);
}
.exp-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.exp-card {
  background: var(--surface);
  border: var(--border-card);
  box-shadow: var(--shadow-hard);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.exp-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-lg);
}
.exp-graphic {
  position: relative;
  height: 120px;
  overflow: hidden;
  border-bottom: var(--border-card);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 24px 24px;
  background-color: var(--surface-alt);
}
.exp-graphic svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.exp-body {
  padding: 14px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}
.exp-index {
  font: 700 10px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
}
.exp-card h3 {
  font: 800 clamp(1.05rem, 1.35vw, 1.3rem) / 1.2 var(--display);
  letter-spacing: -0.01em;
}
.exp-card p {
  font: 400 12.5px / 1.45 var(--body);
  color: var(--gray-600);
}
.exp-graphic-mentor .g-ring-outer { fill: none; stroke: var(--blue); stroke-width: 1.5; opacity: 0.3; }
.exp-graphic-mentor .g-ring-mid   { fill: none; stroke: var(--blue); stroke-width: 1.5; opacity: 0.6; }
.exp-graphic-mentor .g-ring-inner { fill: none; stroke: var(--blue); stroke-width: 2; }
.exp-graphic-mentor .g-arrow      { stroke: var(--blue); stroke-width: 2.5; fill: none; stroke-linecap: round; }
.exp-graphic-mentor .g-dot        { fill: var(--blue); }
.exp-graphic-network .g-edge      { stroke: var(--red); stroke-width: 1.5; opacity: 0.5; }
.exp-graphic-network .g-node      { fill: var(--surface); stroke: var(--red); stroke-width: 2; }
.exp-graphic-network .g-node-fill { fill: var(--red); }
.exp-graphic-events .g-dot-b { fill: var(--blue); }
.exp-graphic-events .g-dot-r { fill: var(--red); }
.exp-graphic-events .g-dot-y { fill: var(--yellow); }
.exp-graphic-events .g-dot-g { fill: var(--green); }
.exp-graphic-events .g-rule  { stroke: var(--line); stroke-width: 1.5; }
.exp-graphic-build .g-bracket    { stroke: var(--green); stroke-width: 2.5; fill: none; stroke-linecap: square; }
.exp-graphic-build .g-bar-bg     { fill: var(--line); }
.exp-graphic-build .g-bar-fill   { fill: var(--green); }
.exp-graphic-build .g-bar-fill-2 { fill: var(--green); opacity: 0.5; }
.exp-graphic-build .g-dot        { fill: var(--green); }

/* =============================================================
   07 / REWARDS & PERKS
   ============================================================= */
.rewards {
  border-bottom: var(--border-ink);
}
.rewards-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: clamp(20px, 3vw, 48px);
  margin-bottom: 20px;
}
.rewards-note {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
  max-width: 220px;
  text-align: right;
  line-height: var(--leading-loose);
  padding: 6px 12px;
  border: var(--border-card);
  background: var(--surface);
}
.prize-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}
.prize-card {
  background: var(--surface);
  border: var(--border-card);
  box-shadow: var(--shadow-hard);
  padding: clamp(20px, 2.6vw, 32px);
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 5px solid var(--ink);
  transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.prize-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-lg);
}
.prize-card[data-color="yellow"] { border-top-color: var(--yellow); }
.prize-card[data-color="blue"]   { border-top-color: var(--blue); }
.prize-card[data-color="red"]    { border-top-color: var(--red); }
.prize-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.prize-ribbon-icon {
  width: 20px;
  height: 20px;
  color: var(--muted);
  filter: drop-shadow(1.5px 1.5px 0 var(--ink));
  transition: transform var(--dur-fast) var(--ease-spring), color var(--dur-fast);
}
.prize-card:hover .prize-ribbon-icon {
  transform: scale(1.15) rotate(5deg);
  color: var(--ink);
}
.prize-card[data-color="yellow"] .prize-ribbon-icon { color: var(--yellow-dark); }
.prize-card[data-color="blue"]   .prize-ribbon-icon { color: var(--blue); }
.prize-card[data-color="red"]    .prize-ribbon-icon { color: var(--red); }
.prize-index {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
}
.prize-card h3 {
  font: 900 clamp(1.25rem, 1.8vw, 1.65rem) / 1.15 var(--display);
  letter-spacing: -0.015em;
}
.prize-card[data-color="yellow"] h3 { color: var(--yellow-dark); }
.prize-card[data-color="blue"]   h3 { color: var(--blue); }
.prize-card[data-color="red"]    h3 { color: var(--red); }
.prize-desc {
  font: 400 13px / 1.45 var(--body);
  color: var(--gray-600);
  flex: 1;
}
.prize-amount {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: 4px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}
.prize-amount-value[data-pending] {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
  background: var(--surface-alt);
  padding: 6px 14px;
  border: 1.5px dashed var(--line);
}

.perks-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.perk-item {
  background: var(--surface);
  border: var(--border-card);
  box-shadow: var(--shadow-hard-sm);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.perk-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard);
}
.perk-index {
  font: 700 10px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
}
.perk-dot {
  display: block;
  width: 8px; height: 8px;
  border-radius: var(--radius-full);
  margin-bottom: 2px;
}
.perk-item[data-color="blue"]   .perk-dot { background: var(--blue); }
.perk-item[data-color="red"]    .perk-dot { background: var(--red); }
.perk-item[data-color="yellow"] .perk-dot { background: var(--yellow); }
.perk-item[data-color="green"]  .perk-dot { background: var(--green); }
.perk-item h3 {
  font: 800 clamp(0.9rem, 1.1vw, 1.05rem) / var(--leading-snug) var(--display);
  letter-spacing: -0.01em;
}
.perk-item p {
  font: 400 12px / 1.4 var(--body);
  color: var(--gray-600);
}

/* =============================================================
   08 / MARK YOUR CALENDAR (DETAILS)
   ============================================================= */
.details {
  border-bottom: var(--border-ink);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
}
.details-card {
  border: var(--border-card);
  box-shadow: var(--shadow-hard);
  padding: clamp(24px, 4vw, 44px);
  background: var(--surface);
}
.date-lockup {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin: 16px 0;
}
.date-lockup strong {
  font: 900 clamp(2.8rem, 5.5vw, 4.6rem) / 0.85 var(--display);
  letter-spacing: -0.04em;
  color: var(--green);
}
.date-lockup span {
  font: 700 11.5px var(--mono);
  line-height: 1.5;
  color: var(--muted);
}
.details-date-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--green-dark);
}
.details-copy > p {
  font: 500 14px / var(--leading-loose) var(--body);
  color: var(--gray-600);
  max-width: 480px;
  margin-bottom: 18px;
}
.status-line {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
}

/* =============================================================
   09 / FROM THE ARCHIVES & LIGHTBOX
   ============================================================= */
.archives {
  border-bottom: var(--border-ink);
}
.archives-lede {
  font: 400 clamp(13.5px, 1.2vw, 15.5px) / 1.55 var(--body);
  color: var(--gray-600);
  max-width: 540px;
  margin-bottom: 20px;
}
.archive-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(32px, 5vw, 64px);
}
.archive-heading {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
  border-bottom: var(--border-card);
  padding-bottom: 16px;
}
.archive-heading span {
  font: 700 11px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
}
.archive-heading h3 {
  font: 800 clamp(1.3rem, 2vw, 1.8rem) var(--display);
  letter-spacing: var(--tracking-tight);
}
.archive-gallery {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  grid-template-rows: repeat(2, 160px);
  gap: 12px;
  margin-top: 18px;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border: var(--border-card);
  box-shadow: var(--shadow-hard-sm);
  background: var(--surface);
  cursor: pointer;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  transition: transform var(--dur-fast) var(--ease-standard), box-shadow var(--dur-fast) var(--ease-standard);
}
.gallery-item:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-hard);
  z-index: var(--z-raised);
}
.gallery-feature {
  grid-row: span 2;
}
.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.gallery-ph-svg {
  width: 100%;
  height: 100%;
  display: block;
}
.gallery-ph-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: var(--sp-2) var(--sp-3);
  font: 700 10px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
  background: linear-gradient(transparent, var(--surface) 70%);
  pointer-events: none;
}

/* Lightbox Modal */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: rgba(10, 10, 10, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-standard);
}
.lightbox.lb-open {
  opacity: 1;
  pointer-events: auto;
}
.lb-figure {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-4);
  max-width: min(90vw, 960px);
  width: 100%;
}
.lb-media {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 2px solid var(--gray-700);
  background: var(--gray-900);
  display: flex;
  align-items: center;
  justify-content: center;
}
.lb-caption {
  font: 700 11px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--gray-400);
  text-align: center;
}
.lb-counter {
  position: absolute;
  bottom: calc(-1 * var(--sp-8));
  left: 50%;
  transform: translateX(-50%);
  font: 700 11px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--gray-500);
}
.lb-close, .lb-prev, .lb-next {
  position: fixed;
  background: var(--gray-900);
  border: 2px solid var(--gray-600);
  color: var(--paper);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background var(--dur-fast) var(--ease-standard), border-color var(--dur-fast) var(--ease-standard);
}
.lb-close:hover, .lb-prev:hover, .lb-next:hover {
  background: var(--ink);
  border-color: var(--green);
  color: var(--green);
}
.lb-close { top: var(--sp-5); right: var(--sp-5); width: 44px; height: 44px; font-size: 20px; }
.lb-prev  { left: var(--sp-5); top: 50%; transform: translateY(-50%); width: 48px; height: 48px; font-size: 24px; }
.lb-next  { right: var(--sp-5); top: 50%; transform: translateY(-50%); width: 48px; height: 48px; font-size: 24px; }

/* =============================================================
   10 / ORGANIZERS & 11 / SPONSORS
   ============================================================= */
.organizers, .sponsors {
  border-bottom: var(--border-ink);
}
.coming-panel {
  margin-top: 20px;
  border: var(--border-card);
  box-shadow: var(--shadow-hard);
  min-height: 180px;
  padding: clamp(20px, 3.5vw, 36px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  background: var(--surface);
  position: relative;
  overflow: hidden;
}
.coming-panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue) 25%, var(--red) 25% 50%, var(--yellow) 50% 75%, var(--green) 75%);
}
.coming-panel strong {
  font: 900 clamp(1.6rem, 3.2vw, 2.5rem) / 1.05 var(--display);
  letter-spacing: -0.02em;
}
.coming-panel p {
  font: 400 13.5px / 1.5 var(--body);
  color: var(--gray-600);
  max-width: 420px;
}

.sponsor-empty {
  margin-top: 20px;
  border: var(--border-card);
  box-shadow: var(--shadow-hard);
  background: var(--surface);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.sponsor-empty-svg {
  width: 100%;
  max-width: 600px;
  height: auto;
}
.sponsor-empty-label {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
}

/* Sponsor Tiers & Cards */
.sponsor-tier {
  margin-top: 24px;
}
.sponsor-tier-label {
  font: 700 11px var(--mono);
  letter-spacing: var(--tracking-widest);
  color: var(--muted);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.sponsor-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.sponsor-card {
  background: var(--surface);
  border: var(--border-card);
  box-shadow: var(--shadow-hard);
  border-radius: 4px;
  padding: 16px 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  transition: transform 0.2s var(--ease-spring), box-shadow 0.2s var(--ease-spring);
}
.sponsor-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-lg);
}
.sponsor-card a {
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}
.sponsor-logo {
  max-height: 40px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  display: block;
}

/* =============================================================
   12 / WHERE WE BUILD (VENUE)
   ============================================================= */
.venue {
  border-bottom: var(--border-ink);
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: clamp(24px, 4.5vw, 64px);
  align-items: start;
}
.venue-name {
  font: 800 clamp(1.1rem, 1.4vw, 1.35rem) / 1.2 var(--display);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}
.venue-location {
  font: 400 13.5px / 1.5 var(--body);
  color: var(--gray-600);
  margin-bottom: 16px;
}
.venue-meta {
  font: 700 10.5px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
  line-height: var(--leading-loose);
  padding: 6px 12px;
  border: var(--border-card);
  background: var(--surface);
  box-shadow: var(--shadow-hard-sm);
  display: inline-block;
}
.venue-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.venue-map-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: var(--border-card);
  box-shadow: var(--shadow-hard);
  background: var(--surface);
  position: relative;
}
.venue-map-svg,
.venue-map-iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.apply-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* =============================================================
   13 / FAQ ACCORDION
   ============================================================= */
.faq {
  border-bottom: var(--border-ink);
}
.faq-list {
  max-width: 880px;
  margin: 18px 0 0 auto;
  border-top: var(--border-ink);
}
.faq-item {
  border-bottom: 1.5px solid var(--line);
}
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: transparent;
  padding: 14px 0;
  text-align: left;
  color: var(--ink);
  font: 700 clamp(13px, 1.1vw, 15px) var(--display);
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-standard);
}
.faq-question:hover {
  color: var(--green);
}
.faq-question span:last-child {
  font: 700 1.25rem var(--mono);
  transition: transform var(--dur-base) var(--ease-standard);
  flex-shrink: 0;
  color: var(--green);
}
.faq-question[aria-expanded="true"] span:last-child {
  transform: rotate(45deg);
  color: var(--red);
}
.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-slow) var(--ease-standard);
}
.faq-answer > div {
  overflow: hidden;
}
.faq-answer p {
  margin: 0 0 16px;
  font: 400 13.5px / 1.55 var(--body);
  color: var(--gray-600);
  max-width: 680px;
}
.faq-answer[hidden] {
  display: grid;
  visibility: hidden;
}
.faq-answer.open {
  grid-template-rows: 1fr;
  visibility: visible;
}

/* =============================================================
   14 / MAKE YOUR MOVE (FINAL CTA)
   ============================================================= */
.final-cta {
  background: var(--ink);
  color: var(--paper);
  border-bottom: var(--border-ink);
  position: relative;
  overflow: hidden;
}
.final-cta::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue) 25%, var(--red) 25% 50%, var(--yellow) 50% 75%, var(--green) 75%);
}
.final-cta-inner {
  max-width: 960px;
}
.final-cta h2 {
  font: 900 clamp(2.4rem, 5vw, 4.2rem) / 0.95 var(--display);
  letter-spacing: -0.03em;
  margin: 20px 0;
}
.final-cta h2 em {
  color: var(--green);
}
.final-cta p {
  font: 700 11.5px var(--mono);
  line-height: 1.6;
  color: var(--gray-400);
  letter-spacing: var(--tracking-wide);
}
.final-cta .button-light {
  box-shadow: 5px 5px 0 var(--green);
}
.final-cta .button-light:hover {
  box-shadow: 8px 8px 0 var(--green);
}

/* =============================================================
   15 / STAY IN THE LOOP (REGISTER)
   ============================================================= */
.register {
  border-bottom: var(--border-ink);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4.5vw, 60px);
  align-items: center;
}
.register-inner h2 {
  font: 900 clamp(1.85rem, 3.2vw, 2.75rem) / 1.08 var(--display);
  letter-spacing: -0.03em;
  margin: 12px 0 14px;
}
.register-inner h2 em {
  color: var(--green);
}
.register-inner p {
  font: 400 13.5px / 1.55 var(--body);
  color: var(--gray-600);
  max-width: 440px;
  margin-bottom: 20px;
}
.scribble {
  display: block;
  font: 900 clamp(1.4rem, 2.5vw, 2.1rem) / 1.1 var(--display);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--ink);
}
.color-bars {
  display: flex;
  gap: 8px;
}
.color-bars i {
  display: block;
  height: 6px;
  width: 44px;
}
.color-bars i.blue   { background: var(--blue); }
.color-bars i.red    { background: var(--red); }
.color-bars i.yellow { background: var(--yellow); }
.color-bars i.green  { background: var(--green); }

/* =============================================================
   FOOTER
   ============================================================= */
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  padding: 40px var(--section-x);
  background: var(--surface);
  border-top: var(--border-ink);
  font-size: 14px;
}
footer p {
  font: 400 13px / 1.5 var(--body);
  color: var(--muted);
}
footer a {
  font: 700 11px var(--mono);
  color: var(--blue);
}
.footer-ig {
  font: 700 11px var(--mono);
  letter-spacing: var(--tracking-wide);
  color: var(--muted);
}
.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links a {
  color: inherit;
  text-decoration: none;
}
.footer-links a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* =============================================================
   CUSTOM CURSOR (DESKTOP / FINE-POINTER ONLY)
   ============================================================= */
@media (pointer: fine) {
  .custom-cursor, .custom-cursor * { cursor: none !important; }
}
.cur-dot, .cur-ring {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: calc(var(--z-modal) + 10);
  border-radius: var(--radius-full);
  will-change: transform;
  transform: translate(-200px, -200px);
}
@media (pointer: coarse) {
  .cur-dot, .cur-ring { display: none !important; }
}
.cur-dot {
  width: 6px; height: 6px;
  background: var(--ink);
  margin: -3px 0 0 -3px;
  transition: width var(--dur-fast) var(--ease-spring), height var(--dur-fast) var(--ease-spring), background var(--dur-fast) var(--ease-standard), opacity var(--dur-fast) var(--ease-standard);
}
.cur-ring {
  width: 32px; height: 32px;
  border: 2px solid var(--ink);
  margin: -16px 0 0 -16px;
  opacity: 0.35;
  transition: width var(--dur-base) var(--ease-spring), height var(--dur-base) var(--ease-spring), border-color var(--dur-base) var(--ease-standard), opacity var(--dur-base) var(--ease-standard);
}
.cur-dot.cur-hidden, .cur-ring.cur-hidden { opacity: 0; }
.cur-dot[data-state="hover"]  { width: 8px; height: 8px; margin: -4px 0 0 -4px; background: var(--green); }
.cur-ring[data-state="hover"] { width: 44px; height: 44px; margin: -22px 0 0 -22px; border-color: var(--green); opacity: 0.7; }
.cur-dot[data-state="cta"]    { width: 10px; height: 10px; margin: -5px 0 0 -5px; background: var(--green); }
.cur-ring[data-state="cta"]   { width: 52px; height: 52px; margin: -26px 0 0 -26px; border-color: var(--green); opacity: 0.85; }
.cur-dot[data-state="graphic"]{ width: 8px; height: 8px; margin: -4px 0 0 -4px; background: var(--blue); }
.cur-ring[data-state="graphic"]{ width: 48px; height: 48px; margin: -24px 0 0 -24px; border-color: var(--blue); opacity: 0.6; }

/* =============================================================
   RESPONSIVE DESIGN (ALL VIEWPORTS)
   ============================================================= */
@media (max-width: 1023px) and (min-width: 768px) {
  .hero-stage h1 { font-size: clamp(5rem, 12vw, 9rem); }
  .perks-grid { grid-template-columns: repeat(3, 1fr); }
  .rounds { grid-template-columns: 1fr 1fr; }
  .archive-grid { grid-template-columns: 1fr 1fr; }
  .details { grid-template-columns: 1fr 1fr; }
  .register { grid-template-columns: 1fr 1fr; }
  .principles { grid-template-columns: repeat(3, 1fr); }
  .exp-grid { grid-template-columns: repeat(2, 1fr); }
  .hw-obj-3, .hw-obj-6, .hw-obj-8 { display: none; }
  .hw-tree-3, .hw-tree-6 { display: none; }
}

@media (max-width: 767px) {
  .menu-toggle { display: flex; }
  .desktop-nav { display: none; }
  .site-header { width: calc(100% - 24px); justify-content: space-between; padding: 0 16px; top: 12px; height: 50px; }
  .brand { border-right: none; padding-right: 0; }
  
  .hero-stage {
    padding-top: clamp(65px, 12vh, 85px);
    padding-bottom: clamp(10px, 2vh, 20px);
  }
  .hero-stage h1 {
    font-size: clamp(2.2rem, 10vw, 3.8rem);
  }
  .hero-stats {
    flex-wrap: wrap;
    justify-content: center;
  }
  .hero-stat-div {
    display: none;
  }
  .popout-bulb { width: 34px; top: -14px; left: -4px; }
  .popout-puzzle { width: 36px; left: -14px; }
  .popout-team { width: 40px; bottom: -12px; left: 0; }
  .popout-rocket { width: 34px; top: -14px; right: -4px; }
  .popout-target { width: 34px; right: -14px; }
  .popout-laptop { width: 38px; bottom: -12px; right: 0; }

  .countdown-digits { gap: var(--sp-3); }
  .cd-sep { display: none; }
  .cd-slot {
    height: clamp(3.4rem, 18vw, 5.5rem);
    min-width: clamp(4.5rem, 20vw, 6.8rem);
  }
  .cd-cur, .cd-next { font-size: clamp(3.4rem, 18vw, 5.5rem); }

  .foundation-layout { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr; }
  .rounds { grid-template-columns: 1fr; }
  .stage-rail { flex-direction: column; align-items: flex-start; }
  .stage-rail::before { top: 20px; bottom: 20px; left: 22px; right: auto; width: 2px; height: auto; }
  .stage-rail::after { top: 20px; left: 22px; width: 2.5px; height: 0; }
  .stage-rail.rail-filled::after { width: 2.5px; height: calc(100% - 40px); }
  .stage-item { flex-direction: row; align-items: center; padding: 0 0 var(--sp-6) 0; gap: var(--sp-4); }

  .tl-desktop { display: none; }
  .tl-entries-v { display: flex; }

  .exp-grid { grid-template-columns: 1fr; }
  .prize-grid { grid-template-columns: 1fr; }
  .perks-grid { grid-template-columns: repeat(2, 1fr); }
  .details { grid-template-columns: 1fr; }
  .archive-grid, .venue, .register { grid-template-columns: 1fr; }
  .archive-gallery { grid-template-rows: repeat(2, 120px); }
  .faq-list { margin-top: 40px; margin-left: 0; }
  footer { flex-direction: column; align-items: flex-start; }

  .hw-obj-3, .hw-obj-4, .hw-obj-6, .hw-obj-7, .hw-obj-8 { display: none; }
  .hw-tree-2, .hw-tree-3, .hw-tree-5, .hw-tree-6 { display: none; }
  .hw-leaf-3, .hw-leaf-4, .hw-leaf-7, .hw-leaf-8, .hw-leaf-9, .hw-leaf-10 { display: none; }
}

@media (max-width: 380px) {
  :root { --section-x: 16px; }
  .hero-stage h1 { font-size: clamp(3.2rem, 16vw, 4.5rem); }
  .perks-grid { grid-template-columns: 1fr; }
  .date-lockup strong { font-size: clamp(2.8rem, 14vw, 4rem); }
}

/* =============================================================
   REDUCED MOTION (STOPS MOTION · PRESERVES ALL VISUALS)
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  :root {
    --dur-fast:   0ms;
    --dur-base:   0ms;
    --dur-slow:   0ms;
    --dur-reveal: 0ms;
  }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .hw-scroll-far, .hw-scroll-mid, .hw-scroll-fore,
  .hw-cloud, .hw-obj, .hw-node,
  .hw-tree, .hw-leaf {
    animation: none !important;
  }
  .reveal, .reveal.will-animate {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* =============================================================
   ACCESSIBLE FOCUS STATES
   ============================================================= */
.faq-question:focus-visible,
.button:focus-visible,
.text-link:focus-visible,
footer a:focus-visible,
.menu-toggle:focus-visible,
.desktop-nav a:focus-visible,
.mobile-nav a:focus-visible,
.skip-link:focus,
.gallery-item:focus-visible,
.org-social:focus-visible {
  outline: 2.5px solid var(--green);
  outline-offset: 4px;
}