/* ===========================
   EDUDEV COMMONS — STYLE.CSS
   Neo-Brutalist Design System
   
   Logo Colors (from PNG):
   --slate-bg:  #6B7A8D   (background grey)
   --slate-mid: #3D4E6A   (navy)
   --slate-dk:  #2B3A52   (dark navy)
   --off-white: #D8DDE6   (light text)
   
   Influenced by:
   - Mugsy: thick borders, hard shadows, dots
   - Odysseus: bento cards, warm paper, mono type
   - FIFA: animated preloader, bold reveal
   - Tokkebi: moving background pattern
=========================== */

@import url("https://fonts.googleapis.com/css2?family=Syne:wght@700;800&family=Space+Grotesk:wght@400;500;600;700&family=DM+Mono:wght@400;500&display=swap");

/* ===== DESIGN TOKENS ===== */
:root {
  /* EduDev brand from logo */
  --slate-bg:    #6B7A8D;
  --slate-mid:   #3D4E6A;
  --slate-dk:    #1E2B3E;
  --slate-xdk:   #141C28;
  --off-white:   #D8DDE6;
  --accent:      #7A93B8;
  --accent-lt:   #9AABC2;

  /* Neo-brutalist system */
  --ink:     #141C28;
  --paper:   #EFF2F7;
  --white:   #FAFBFD;
  --bd:      3px solid var(--ink);
  --sh:      7px 7px 0 var(--ink);
  --sh-sm:   4px 4px 0 var(--ink);
  --sh-lg:   10px 10px 0 var(--ink);

  /* Accent pops (neo-brutalist) — all in EduDev's palette */
  --pop-blue:   #7A93B8;
  --pop-steel:  #3D4E6A;
  --pop-mist:   #9AABC2;
  --pop-glow:   #C8D8ED;

  /* Typography */
  --font-display: "Syne", sans-serif;
  --font-body:    "Space Grotesk", system-ui, sans-serif;
  --font-mono:    "DM Mono", monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  background-image: radial-gradient(var(--ink) 1.1px, transparent 1.1px);
  background-size: 28px 28px;
  background-position: -14px -14px;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ===== SCROLL PROGRESS ===== */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 4px;
  width: 0%;
  background: linear-gradient(90deg, var(--slate-mid), var(--accent-lt));
  z-index: 2000;
  transition: width 0.1s linear;
}

/* ===== PRELOADER ===== */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--slate-xdk);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}

.preloader-logo {
  position: relative;
  width: 160px;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-ripple {
  position: absolute;
  border-radius: 50%;
  border: 2px solid rgba(122, 147, 184, 0.3);
  animation: rippleOut 2s ease-out infinite;
}

.r1 { width: 100%; height: 100%; animation-delay: 0s; }
.r2 { width: 140%; height: 140%; left: -20%; top: -20%; animation-delay: 0.4s; }
.r3 { width: 180%; height: 180%; left: -40%; top: -40%; animation-delay: 0.8s; }

@keyframes rippleOut {
  0% { opacity: 0.8; transform: scale(0.8); }
  100% { opacity: 0; transform: scale(1.4); }
}

.preloader-img {
  width: 120px;
  height: 120px;
  object-fit: contain;
  border-radius: 50%;
  animation: preloaderPulse 1.5s ease-in-out infinite alternate;
  position: relative;
  z-index: 2;
  border: 3px solid var(--accent);
  background: var(--slate-mid);
  padding: 8px;
}

@keyframes preloaderPulse {
  from { transform: scale(1); filter: brightness(1); }
  to { transform: scale(1.06); filter: brightness(1.2); }
}

.preloader-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.preloader-name {
  display: flex;
  gap: 4px;
}

.p-char {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.8rem;
  color: var(--off-white);
  opacity: 0;
  transform: translateY(20px);
  animation: charReveal 0.5s ease forwards;
  animation-delay: calc(var(--i) * 0.08s + 0.3s);
}

@keyframes charReveal {
  to { opacity: 1; transform: translateY(0); }
}

.preloader-sub {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  color: var(--accent);
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 0.5s ease 1s forwards;
}

.preloader-bar-wrap {
  width: 220px;
  height: 6px;
  border: 2px solid var(--accent);
  border-radius: 3px;
  overflow: hidden;
  background: rgba(122,147,184,0.1);
}

.preloader-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--slate-mid), var(--accent-lt));
  border-radius: 2px;
  transition: width 0.15s linear;
}

.preloader-tagline {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(216, 221, 230, 0.45);
  letter-spacing: 0.05em;
  opacity: 0;
  animation: fadeIn 0.5s ease 1.4s forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

/* ===== MARQUEE ===== */
.marquee {
  background: var(--ink);
  color: var(--paper);
  border-bottom: var(--bd);
  overflow: hidden;
  white-space: nowrap;
  padding: 10px 0;
}

.marquee-track {
  display: inline-flex;
  gap: 48px;
  animation: marqueeScroll 20s linear infinite;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  padding-left: 48px;
}

@keyframes marqueeScroll {
  to { transform: translateX(-50%); }
}

/* ===== NAVBAR ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--paper);
  border-bottom: var(--bd);
  background-image: radial-gradient(var(--ink) 1.1px, transparent 1.1px);
  background-size: 28px 28px;
  background-position: -14px -14px;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: rgba(20, 28, 40, 0.96);
  background-image: none;
  backdrop-filter: blur(20px);
  border-bottom: 3px solid var(--accent);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 12px 26px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  border-radius: 50%;
  border: var(--bd);
  box-shadow: var(--sh-sm);
  background: var(--slate-mid);
  padding: 3px;
  transition: var(--transition);
}

.nav-logo:hover .nav-logo-img {
  transform: translate(-2px, -2px);
  box-shadow: var(--sh);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.navbar:not(.scrolled) .logo-edu { color: var(--slate-dk); }
.navbar:not(.scrolled) .logo-dev { color: var(--slate-mid); }
.navbar:not(.scrolled) .logo-commons { color: var(--slate-bg); font-weight: 600; }
.navbar.scrolled .logo-text { color: #fff; }
.navbar.scrolled .logo-commons { color: var(--accent-lt); }

.nav-links {
  display: flex;
  gap: 2px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  padding: 7px 14px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  letter-spacing: 0.04em;
  transition: all 0.15s;
}

.navbar:not(.scrolled) .nav-link { color: var(--ink); }
.navbar:not(.scrolled) .nav-link:hover {
  border-color: var(--ink);
  background: var(--white);
  box-shadow: var(--sh-sm);
}

.navbar.scrolled .nav-link { color: rgba(255,255,255,0.75); }
.navbar.scrolled .nav-link:hover {
  color: #fff;
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.3);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  border-radius: var(--radius-sm);
  border: var(--bd);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--sh);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}

.btn-primary {
  background: var(--slate-mid);
  color: var(--off-white);
  box-shadow: var(--sh-sm);
}

.btn-primary:hover {
  background: var(--slate-dk);
}

.btn-secondary {
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--sh-sm);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.btn-ghost:hover { background: var(--ink); color: var(--off-white); }

.btn-nav {
  padding: 9px 18px;
  font-size: 0.82rem;
  background: var(--slate-mid);
  color: var(--off-white);
  box-shadow: var(--sh-sm);
}

.navbar.scrolled .btn-nav {
  background: var(--accent);
  color: var(--ink);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 2px solid var(--ink);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  margin-left: auto;
  box-shadow: var(--sh-sm);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: var(--transition);
}

.navbar.scrolled .hamburger { border-color: rgba(255,255,255,0.3); box-shadow: none; }
.navbar.scrolled .hamburger span { background: #fff; }

/* ===== CONTAINER ===== */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 26px;
}

/* ===== SECTIONS ===== */
.section { padding: 96px 0; }

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--slate-bg);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-eyebrow::before {
  content: '';
  display: block;
  width: 28px;
  height: 3px;
  background: var(--slate-mid);
  flex-shrink: 0;
}

.eyebrow-light { color: var(--accent-lt); }
.eyebrow-light::before { background: var(--accent-lt); }

.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 20px;
}

.title-ink-outline {
  color: transparent;
  -webkit-text-stroke: 3px var(--ink);
}

.title-light-outline {
  color: transparent;
  -webkit-text-stroke: 3px var(--off-white);
}

.section-sub {
  font-size: 1.05rem;
  color: var(--slate-bg);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 52px;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background: var(--slate-xdk);
  border-bottom: var(--bd);
}

/* Tokkebi-inspired moving oblique background */
.hero-bg-dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(122,147,184,0.12) 1.5px, transparent 1.5px);
  background-size: 36px 36px;
  pointer-events: none;
}

.hero-bg-move {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -55deg,
    transparent,
    transparent 40px,
    rgba(61, 78, 106, 0.08) 40px,
    rgba(61, 78, 106, 0.08) 41px
  );
  animation: heroBgMove 30s linear infinite;
  pointer-events: none;
}

@keyframes heroBgMove {
  from { transform: translateX(0) translateY(0); }
  to { transform: translateX(80px) translateY(-80px); }
}

.hero-grid {
  position: relative;
  z-index: 2;
  max-width: 1240px;
  margin: 0 auto;
  padding: 60px 26px;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 40px;
  align-items: center;
  min-height: 82vh;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-lt);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.eyebrow-dot {
  width: 8px;
  height: 8px;
  background: #7AFFC4;
  border-radius: 50%;
  animation: blinkDot 2s ease infinite;
}

@keyframes blinkDot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3rem, 6.8vw, 5.2rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--off-white);
  margin-bottom: 20px;
}

.hero-title-outline {
  color: transparent;
  -webkit-text-stroke: 3px var(--accent);
  display: block;
}

.hero-desc {
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  color: rgba(216, 221, 230, 0.72);
  max-width: 500px;
  line-height: 1.65;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-actions .btn-primary {
  background: var(--accent);
  color: var(--ink);
}

.hero-actions .btn-ghost {
  border-color: rgba(216,221,230,0.4);
  color: var(--off-white);
}

.hero-actions .btn-ghost:hover {
  background: rgba(216,221,230,0.1);
  border-color: var(--off-white);
}

/* HERO RIGHT SIDE - Unified Card style */
.hero-card-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.hero-unified-card {
  background: var(--off-white);
  border: var(--bd);
  box-shadow: var(--sh);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
  max-width: 320px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  animation: heroLogoFloat 6s ease-in-out infinite;
}

.hero-unified-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--sh-lg);
}

.huc-header {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 2.5px solid var(--ink);
  padding-bottom: 14px;
}

.huc-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--slate-mid);
  padding: 3px;
  flex-shrink: 0;
}

.huc-brand {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.huc-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--slate-dk);
  line-height: 1.1;
}

.huc-sub {
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 500;
  color: var(--slate-bg);
  letter-spacing: 0.12em;
}

.huc-badge {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 500;
  background: var(--pop-glow);
  border: 2px solid var(--ink);
  padding: 3px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

.huc-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 7px 0;
  border-bottom: 1.5px solid rgba(20, 28, 40, 0.1);
  font-family: var(--font-mono);
  font-size: 11px;
}

.stat-row:last-child {
  border-bottom: none;
}

.stat-label-mono {
  color: var(--slate-bg);
  font-size: 10px;
}

.stat-val {
  font-weight: 700;
  color: var(--ink);
}

.huc-footer {
  border-top: 2.5px solid var(--ink);
  padding-top: 14px;
}

.stat-big {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2.2rem;
  line-height: 1;
  color: var(--slate-mid);
  letter-spacing: -0.04em;
}

@keyframes heroLogoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ===== ABOUT ===== */
.about {
  background: var(--white);
  border-bottom: var(--bd);
}

.about-bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.bento-card {
  background: var(--paper);
  border: var(--bd);
  box-shadow: var(--sh-sm);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.bento-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--sh-lg);
}

.bento-open  { background: #e8edf4; }
.bento-quality { background: #dce5f0; }
.bento-community { background: #cfd9ea; }
.bento-global { background: #c2cfe4; }

.bento-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border: var(--bd);
  box-shadow: 3px 3px 0 var(--ink);
  border-radius: var(--radius-sm);
  background: var(--pop-glow);
  margin-bottom: 16px;
  color: var(--ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.bento-icon svg {
  display: block;
  stroke: var(--ink);
  transition: transform 0.2s ease;
}

.bento-card:hover .bento-icon {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--ink);
}

.bento-card:hover .bento-icon svg {
  transform: scale(1.1) rotate(-5deg);
}

.bento-card h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.bento-card p {
  font-size: 0.87rem;
  color: var(--slate-mid);
  line-height: 1.6;
  flex: 1;
}

.bento-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--off-white);
  padding: 5px 10px;
  border-radius: 4px;
  align-self: flex-start;
  transform: rotate(-2deg);
}

/* ===== DATASETS ===== */
.datasets {
  background: var(--paper);
  border-bottom: var(--bd);
}

.datasets-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 52px;
}

.datasets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.dataset-card {
  background: var(--white);
  border: var(--bd);
  box-shadow: var(--sh-sm);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  position: relative;
  overflow: hidden;
}

.dataset-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--sh-lg);
}

.dc-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dc-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 5px 11px;
  border: var(--bd);
  border-width: 2px;
  border-radius: 100px;
  text-transform: uppercase;
  transform: rotate(-2deg);
}

.tag-geo  { background: #C2D0E4; color: var(--ink); }
.tag-science { background: #B8C8DC; color: var(--ink); }
.tag-astro { background: #A8B8D0; color: var(--ink); }

.dc-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  color: #8A7020;
  background: rgba(255, 214, 0, 0.2);
  border: 1.5px solid rgba(138,112,32,0.3);
  padding: 4px 9px;
  border-radius: 100px;
}

.dc-emoji {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border: var(--bd);
  box-shadow: 3px 3px 0 var(--ink);
  border-radius: var(--radius-sm);
  background: var(--pop-glow);
  margin-bottom: 14px;
  color: var(--ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dc-emoji svg {
  display: block;
  stroke: var(--ink);
  transition: transform 0.2s ease;
}

.dataset-card:hover .dc-emoji {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--ink);
}

.dataset-card:hover .dc-emoji svg {
  transform: scale(1.1) rotate(-5deg);
}

.dc-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.2;
}

.dc-desc {
  font-size: 0.87rem;
  color: var(--slate-bg);
  line-height: 1.65;
  flex: 1;
}

.dc-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.dc-pills span {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.05em;
  background: var(--paper);
  border: 2px solid var(--ink);
  padding: 4px 10px;
  border-radius: 4px;
  text-transform: uppercase;
}

.dc-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--ink);
  background: var(--pop-glow);
  border: var(--bd);
  box-shadow: var(--sh-sm);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  align-self: flex-start;
  letter-spacing: 0.02em;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.dc-link:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--sh);
  background: var(--slate-mid);
  color: var(--off-white);
}

.dc-link:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}

/* Dataset wide card */
.dataset-card-wide {
  grid-column: 1 / -1;
  background: var(--slate-mid);
  border: var(--bd);
  box-shadow: var(--sh);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.dataset-card-wide:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--sh-lg);
}

.dcw-inner {
  display: flex;
  align-items: center;
  gap: 32px;
}

.dcw-logo {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 50%;
  border: 3px solid var(--accent);
  padding: 6px;
  background: rgba(255,255,255,0.08);
  flex-shrink: 0;
}

.dcw-text { flex: 1; }

.dcw-text .section-eyebrow { color: var(--accent-lt); }
.dcw-text .section-eyebrow::before { background: var(--accent-lt); }

.dcw-text h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--off-white);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.dcw-text p {
  font-size: 0.95rem;
  color: rgba(216, 221, 230, 0.7);
  line-height: 1.6;
}

.dataset-card-wide .btn-primary {
  background: var(--accent-lt);
  color: var(--ink);
  flex-shrink: 0;
}

/* ===== IMPACT ===== */
.impact {
  position: relative;
  background: var(--slate-xdk);
  border-bottom: var(--bd);
  overflow: hidden;
}

.impact-bg-dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(122,147,184,0.1) 1.5px, transparent 1.5px);
  background-size: 36px 36px;
  pointer-events: none;
}

.impact .container { position: relative; z-index: 2; }

.impact-title { color: var(--off-white); }

.impact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  border: var(--bd);
  border-color: rgba(122, 147, 184, 0.2);
  border-radius: var(--radius-xl, 28px);
  overflow: hidden;
}

.impact-item {
  padding: 48px 44px;
  background: rgba(255,255,255,0.03);
  border-right: 1.5px solid rgba(122, 147, 184, 0.1);
  border-bottom: 1.5px solid rgba(122, 147, 184, 0.1);
  transition: background 0.2s ease;
  position: relative;
}

.impact-item:hover { background: rgba(122, 147, 184, 0.06); }

.impact-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 4rem;
  color: rgba(122, 147, 184, 0.15);
  line-height: 1;
  margin-bottom: 20px;
  letter-spacing: -0.05em;
}

.impact-item h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--off-white);
  margin-bottom: 12px;
}

.impact-item p {
  font-size: 0.92rem;
  color: rgba(216, 221, 230, 0.6);
  line-height: 1.7;
}

/* ===== TEAM ===== */
.team {
  background: var(--white);
  border-bottom: var(--bd);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.value-card {
  background: var(--paper);
  border: var(--bd);
  box-shadow: var(--sh-sm);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.value-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--sh-lg);
}

.value-emoji {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border: var(--bd);
  box-shadow: 3px 3px 0 var(--ink);
  border-radius: var(--radius-sm);
  background: var(--pop-glow);
  margin: 0 auto 16px;
  color: var(--ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.value-emoji svg {
  display: block;
  stroke: var(--ink);
  transition: transform 0.2s ease;
}

.value-card:hover .value-emoji {
  transform: translate(-2px, -2px) rotate(-6deg);
  box-shadow: 5px 5px 0 var(--ink);
}

.value-card:hover .value-emoji svg {
  transform: scale(1.1);
}

.value-card h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--ink);
}

.value-card p {
  font-size: 0.85rem;
  color: var(--slate-bg);
  line-height: 1.55;
}

.join-banner {
  background: var(--paper);
  border: var(--bd);
  box-shadow: var(--sh);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  display: flex;
  align-items: center;
  gap: 32px;
  position: relative;
  overflow: hidden;
}

.join-banner::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--slate-mid), var(--accent-lt), var(--slate-mid));
}

.join-logo {
  flex-shrink: 0;
}

.join-logo img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 50%;
  border: var(--bd);
  box-shadow: var(--sh-sm);
  background: var(--slate-mid);
  padding: 6px;
}

.join-text { flex: 1; }

.join-text h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.6rem;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.join-text p {
  font-size: 0.95rem;
  color: var(--slate-bg);
  line-height: 1.65;
  max-width: 480px;
}

/* ===== CONTACT ===== */
.contact {
  background: var(--paper);
  border-bottom: var(--bd);
}

.social-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.social-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 24px 28px;
  background: var(--white);
  border: var(--bd);
  box-shadow: var(--sh-sm);
  border-radius: var(--radius-lg);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  position: relative;
  overflow: hidden;
}

.social-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  transition: width 0.2s ease;
}

.social-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--sh-lg);
}

.social-card:hover::before { width: 7px; }

.sc-linkedin::before { background: #0A66C2; }
.sc-twitter::before  { background: #000; }
.sc-instagram::before { background: linear-gradient(180deg, #F58529, #DD2A7B, #515BD4); }
.sc-kaggle::before   { background: #20BEFF; }

.sc-icon {
  width: 52px; height: 52px;
  border: var(--bd);
  box-shadow: var(--sh-sm);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.15s ease;
  background: var(--paper);
}

.social-card:hover .sc-icon { transform: rotate(-5deg) scale(1.08); }

.sc-linkedin .sc-icon { color: #0A66C2; }
.sc-twitter .sc-icon  { color: #000; }
.sc-instagram .sc-icon { color: #DD2A7B; }
.sc-kaggle .sc-icon   { color: #0B7BBA; }

.sc-info { flex: 1; }
.sc-info h4 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--ink);
  margin-bottom: 3px;
}
.sc-info p {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--slate-bg);
}

.sc-arrow {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--slate-bg);
  transition: transform 0.2s ease, color 0.2s ease;
}

.social-card:hover .sc-arrow {
  transform: translateX(4px);
  color: var(--ink);
}

/* ===== FOOTER ===== */
.footer {
  background: var(--ink);
  color: var(--off-white);
  border-top: var(--bd);
}

.footer-marquee {
  background: var(--slate-mid);
  overflow: hidden;
  border-bottom: var(--bd);
  padding: 12px 0;
}

.footer-marquee-track {
  display: inline-flex;
  gap: 40px;
  animation: marqueeScroll 25s linear infinite;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  color: var(--off-white);
  padding-left: 40px;
  white-space: nowrap;
}

.footer .container { padding-top: 52px; padding-bottom: 32px; }

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1.5px solid rgba(216, 221, 230, 0.12);
}

.footer-brand {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.footer-logo-img {
  width: 60px;
  height: 60px;
  object-fit: contain;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--slate-mid);
  padding: 5px;
  flex-shrink: 0;
}

.footer-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: #fff;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 0.9rem;
  color: rgba(216, 221, 230, 0.65);
  font-style: italic;
  margin-bottom: 5px;
}

.footer-nonprofit {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(216, 221, 230, 0.35);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.footer-links-group h5 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--accent-lt);
  margin-bottom: 18px;
  text-transform: uppercase;
}

.footer-links-group li { margin-bottom: 10px; }

.footer-links-group a {
  font-size: 0.9rem;
  color: rgba(216, 221, 230, 0.65);
  transition: color 0.15s, transform 0.15s;
  display: inline-block;
}

.footer-links-group a:hover {
  color: #fff;
  transform: translateX(3px);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(216, 221, 230, 0.35);
}

.footer-love { color: rgba(216, 221, 230, 0.45); }

/* ===== AOS ANIMATIONS ===== */
[data-aos] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

[data-aos="zoom-in"] { transform: scale(0.92); }
[data-aos].aos-animate { opacity: 1; transform: translateY(0) scale(1); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; min-height: auto; padding: 100px 26px 60px; }
  .hero-card-side { flex-direction: row; gap: 18px; }
  .hero-logo-card { flex: 1; }
  .hero-stat-card { flex: 1; }
  .about-bento { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .nav-links, .btn-nav { display: none; }
  .hamburger { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 60px; left: 0; right: 0;
    background: rgba(20, 28, 40, 0.97);
    backdrop-filter: blur(20px);
    padding: 20px 24px;
    gap: 6px;
    border-bottom: var(--bd);
    z-index: 999;
  }

  .nav-links.open .nav-link {
    padding: 12px 16px;
    font-size: 1rem;
    color: #fff;
  }

  .hero-card-side { flex-direction: column; }
  .datasets-grid { grid-template-columns: 1fr; }
  .impact-grid { grid-template-columns: 1fr; }
  .social-grid { grid-template-columns: 1fr; }
  .join-banner { flex-direction: column; text-align: center; padding: 28px 24px; }
  .dcw-inner { flex-direction: column; text-align: center; gap: 20px; }
  .datasets-header { flex-direction: column; align-items: flex-start; gap: 16px; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .section { padding: 72px 0; }
}

@media (max-width: 480px) {
  .about-bento { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 3.2rem; }
}