/* SunMRRC — Octen-inspired Dark Design System */
:root {
  /* Background */
  --bg-primary: #000000;
  --bg-secondary: #0d1117;
  --bg-tertiary: #10161e;
  --bg-card: rgba(255,255,255,0.025);

  /* Accent — Cyan/Teal */
  --accent: #22d3ee;
  --accent-dim: #0891b2;
  --accent-glow: rgba(34, 211, 238, 0.15);

  /* Text */
  --text-primary: #ffffff;
  --text-secondary: #8899aa;
  --text-muted: #5c6370;

  /* Border */
  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(34,211,238,0.25);

  /* Nav */
  --nav-h: 56px;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  /* Layout metrics — global nav + site navbar heights */
  --gn-h: 36px;   /* global top nav height */
  --nav-h: 64px;  /* site navbar height (SunsdrMobile overrides to 56px) */

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

p a, li a:not(.nav-links a):not(.footer-section a), .content a:not(.btn):not(.card):not(.lang-btn) {
  color: var(--accent);
  transition: color 0.2s;
}
p a:hover { text-decoration: underline; }

/* ── Container ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

/* ── Navigation ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 90;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.navbar.scrolled {
  background: rgba(0, 0, 0, 0.92);
  border-bottom-color: var(--border-hover);
}
.navbar-content {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--nav-h);
}
.logo {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 1.25rem; font-weight: 700; letter-spacing: -0.02em;
}
.logo-icon { font-size: 1.5rem; }

.nav-links {
  display: flex; align-items: center; gap: 2rem;
}
.nav-links a {
  font-size: 0.875rem; color: var(--text-secondary);
  transition: color 0.2s; font-weight: 500;
  position: relative;
  display: inline-flex; align-items: center; gap: 0.3rem;
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -6px;
  height: 2px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.25s var(--ease);
  border-radius: 2px;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.nav-links a.active { color: var(--text-primary); }

.nav-actions { display: flex; align-items: center; gap: 1rem; }
.lang-btn {
  font-size: 0.875rem; color: var(--text-secondary);
  padding: 0.375rem 0.75rem; border: 1px solid var(--border);
  border-radius: 0.375rem; transition: all 0.2s;
}
.lang-btn:hover { color: var(--text-primary); border-color: var(--border-hover); }
.mobile-menu-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.25rem; cursor: pointer; }

/* ── Hero ── */
.hero {
  padding: 8rem 2rem 6rem;
  text-align: center;
  position: relative; overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 50% 0%, var(--accent-glow), transparent 50%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.375rem 1rem; border-radius: 9999px;
  font-size: 0.875rem; color: var(--accent);
  background: var(--accent-glow); border: 1px solid var(--border-hover);
  margin-bottom: 2rem;
}
.hero-title {
  font-size: 3.5rem; font-weight: 700; line-height: 1.15;
  letter-spacing: -0.03em; margin-bottom: 1.5rem;
}
.gradient {
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.125rem; color: var(--text-secondary);
  max-width: 640px; margin: 0 auto 2.5rem; line-height: 1.7;
}
.hero-actions {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 3rem;
}
.hero-preview {
  max-width: 720px; margin: 0 auto 2rem;
  border-radius: 0.75rem; overflow: hidden;
  border: 1px solid var(--border);
}
.hero-preview img { width: 100%; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 2rem; max-width: 600px; margin: 0 auto;
}
.stat-item { text-align: center; }
.stat-value {
  display: block; font-size: 1.5rem; font-weight: 700;
  color: var(--accent); margin-bottom: 0.25rem;
}
.stat-label { font-size: 0.875rem; color: var(--text-muted); }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.5rem; border-radius: 0.5rem;
  font-size: 0.9375rem; font-weight: 600;
  transition: all 0.2s; cursor: pointer;
}
.btn-large { padding: 0.875rem 2rem; font-size: 1rem; }
.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover { background: #67e8f9; transform: translateY(-1px); }
.btn-secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { border-color: var(--border-hover); transform: translateY(-1px); }

/* ── Sections ── */
.section { padding: 6rem 2rem; }
.section-header { text-align: center; margin-bottom: 4rem; }
.section-label {
  display: inline-block; font-size: 0.875rem; font-weight: 600;
  color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}
.section-title { font-size: 2.5rem; font-weight: 700; letter-spacing: -0.02em; }
.section-subtitle { font-size: 1.125rem; color: var(--text-secondary); margin-top: 0.75rem; }

/* ── Feature Cards ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 0.75rem; padding: 1.5rem;
  transition: all 0.3s;
  display: block;
}
.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}
.card-icon {
  width: 48px; height: 48px; border-radius: 0.75rem;
  background: var(--accent-glow);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem; color: var(--accent);
  margin-bottom: 1rem;
}
.card-title { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.5rem; }
.card-text { font-size: 0.9375rem; color: var(--text-secondary); line-height: 1.7; }

.card-status {
  display: inline-flex; align-items: center; gap: 0.375rem;
  margin-top: 0.75rem; font-size: 0.8125rem; font-weight: 500;
}
.card-status.ok { color: #10b981; }
.card-status.wip { color: #f59e0b; }

/* ── Demo Links ── */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.demo-link {
  display: flex; flex-direction: column;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 0.75rem; padding: 1.5rem;
  transition: all 0.3s;
}
.demo-link:hover { border-color: var(--accent); transform: translateY(-2px); }
.demo-link .arrow {
  margin-top: auto; padding-top: 1rem;
  font-size: 0.875rem; color: var(--accent);
  display: flex; align-items: center; gap: 0.375rem;
}

/* ── Architecture Diagram ── */
.arch-diagram {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 0.75rem; padding: 2rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.8;
  white-space: pre;
  color: var(--text-secondary);
}
.arch-diagram .hl { color: var(--accent); }
.arch-diagram .dim { color: var(--text-muted); }

/* ── Section CTA ── */
.section-cta {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* ── Footer ── */
.footer { padding: 4rem 2rem 2rem; background: var(--bg-secondary); border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.footer-section h4 { font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
.footer-section p { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.7; }
.footer-section ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-section a {
  font-size: 0.875rem; color: var(--text-secondary);
  transition: color 0.2s;
}
.footer-section a:hover { color: var(--text-primary); }
.footer-bottom {
  padding-top: 2rem; border-top: 1px solid var(--border);
  text-align: center; font-size: 0.8125rem; color: var(--text-muted);
}

/* ── Lightbox ── */
.lightbox {
  display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.9); z-index: 1000;
  align-items: center; justify-content: center; padding: 2rem;
}
.lightbox img { max-width: 95vw; max-height: 90vh; border-radius: 0.5rem; }
.lightbox-close {
  position: absolute; top: 1.5rem; right: 1.5rem;
  font-size: 2rem; color: var(--text-secondary); cursor: pointer;
}

/* ── Table (for docs) ── */
table {
  width: 100%; border-collapse: collapse;
  font-size: 0.875rem; margin: 1.5rem 0;
}
th, td {
  padding: 0.75rem 1rem; text-align: left;
  border-bottom: 1px solid var(--border);
}
th { color: var(--text-secondary); font-weight: 600; }
td { color: var(--text-primary); }

/* ── Mobile ── */
@media (max-width: 768px) {
  .nav-links {
    display: none; position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: rgba(0, 0, 0, 0.98); border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 1rem 2rem; gap: 0.75rem;
  }
  .nav-links.active { display: flex; }
  .mobile-menu-toggle { display: block; }
  .hero { padding: 6rem 1.5rem 4rem; }
  .hero-title { font-size: 2.25rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
  .section-title { font-size: 1.75rem; }
  .features-grid { grid-template-columns: 1fr; }
  .demo-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .container { padding: 0 1.25rem; }
}

/* ════════════════════════════════════════════════════════════════════
   VLSC Global Top Nav — shared across all project sites
   Injected by js/global-nav.js. Sits above each site's .navbar/.header.
   ════════════════════════════════════════════════════════════════════ */
.vlsc-gn {
  position: fixed; top: 0; left: 0; right: 0; z-index: 120;
  height: var(--gn-h);
  background: linear-gradient(180deg, rgba(0,0,0,0.96), rgba(10,10,10,0.92));
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  font-size: 0.8125rem;
}
.vlsc-gn-inner {
  height: var(--gn-h);
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
}
.vlsc-gn-brand {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-weight: 700; letter-spacing: -0.01em; color: var(--text-primary);
  white-space: nowrap;
}
.vlsc-gn-brand i { color: var(--accent); font-size: 0.85rem; }
.vlsc-gn-brand .dot { color: var(--accent); margin: 0 0.35rem; opacity: 0.5; }
.vlsc-gn-links {
  display: flex; align-items: center; gap: 1.25rem;
}
.vlsc-gn-links a {
  color: var(--text-secondary); font-weight: 500;
  position: relative; padding: 0.25rem 0;
  transition: color 0.2s var(--ease);
  white-space: nowrap;
}
.vlsc-gn-links a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -3px;
  height: 2px; background: var(--accent);
  transform: scaleX(0); transform-origin: center;
  transition: transform 0.25s var(--ease); border-radius: 2px;
}
.vlsc-gn-links a:hover { color: var(--text-primary); }
.vlsc-gn-links a:hover::after { transform: scaleX(1); }
.vlsc-gn-links a.is-active { color: var(--accent); }
.vlsc-gn-links a.is-active::after { transform: scaleX(1); }
.vlsc-gn-gh {
  color: var(--text-secondary); transition: color 0.2s var(--ease);
  display: inline-flex; align-items: center;
}
.vlsc-gn-gh:hover { color: var(--text-primary); }

/* When the global nav is present, shift fixed site chrome down */
body.vlsc-gn-on { padding-top: var(--gn-h); }
body.vlsc-gn-on .navbar,
body.vlsc-gn-on .header { top: var(--gn-h); }
body.vlsc-gn-on .nav-links { top: var(--nav-h); }
body.vlsc-gn-on .sdd-sidebar { top: calc(var(--gn-h) + 80px); }

@media (max-width: 768px) {
  .vlsc-gn-links { gap: 0.85rem; }
  .vlsc-gn-inner { gap: 0.5rem; }
  body.vlsc-gn-on .nav-links { top: calc(var(--gn-h) + var(--nav-h)); }
}

/* ── Scroll progress bar ── */
.vlsc-scroll-progress {
  position: fixed; top: 0; left: 0; z-index: 200;
  height: 2px; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-dim));
  transition: width 0.1s linear;
  pointer-events: none;
}

/* ── Back-to-top ── */
.vlsc-to-top {
  position: fixed; right: 1.5rem; bottom: 1.5rem; z-index: 110;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--bg-card); border: 1px solid var(--border);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-size: 1rem;
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: all 0.3s var(--ease);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.vlsc-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.vlsc-to-top:hover {
  border-color: var(--accent); background: var(--accent-glow);
  transform: translateY(-2px);
}
@media (max-width: 768px) { .vlsc-to-top { right: 1rem; bottom: 1rem; } }

/* ── Scroll reveal ── */
.vlsc-reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}
.vlsc-reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .vlsc-reveal { opacity: 1; transform: none; transition: none; }
}

/* ── Hero entrance animation ── */
@keyframes vlscHeroIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-badge { animation: vlscHeroIn 0.6s var(--ease) both; }
.hero-title { animation: vlscHeroIn 0.7s var(--ease) 0.1s both; }
.hero-subtitle { animation: vlscHeroIn 0.7s var(--ease) 0.2s both; }
.hero-actions { animation: vlscHeroIn 0.7s var(--ease) 0.3s both; }
.hero-stats { animation: vlscHeroIn 0.7s var(--ease) 0.4s both; }
@media (prefers-reduced-motion: reduce) {
  .hero-badge, .hero-title, .hero-subtitle, .hero-actions, .hero-stats {
    animation: none;
  }
}

/* ── Refined card hover (gradient ring) ── */
.card, .demo-link {
  position: relative;
}
.card:hover, .demo-link:hover {
  border-color: var(--accent);
  box-shadow: 0 12px 40px rgba(0,0,0,0.35), 0 0 0 1px var(--accent-glow);
}
.card-icon { transition: transform 0.3s var(--ease); }
.card:hover .card-icon { transform: scale(1.08); }

/* ── Button polish ── */
.btn { user-select: none; }
.btn-primary:hover {
  box-shadow: 0 8px 24px var(--accent-glow);
}
.btn:active { transform: translateY(0) scale(0.98); }

/* ── Focus visibility (a11y) ── */
a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
  border-radius: 0.25rem;
}

/* ── Footer polish ── */
.footer-section a { display: inline-block; }
.footer-section a:hover { color: var(--accent); }
.footer-bottom { display: flex; flex-direction: column; gap: 0.4rem; }

/* ── Section hover lift for eco/project items ── */
.eco-track, .arch-card, .step, .perf-card, .screen-card { transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease); }

/* ══════════════════════════════════════════════════════════════════════
   Component Styles (shared across all VLSC sub-sites)
   ══════════════════════════════════════════════════════════════════════ */

/* ── Feature cards ── */
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 2rem; transition: all 0.3s;
}
.feature-card:hover {
  border-color: var(--border-hover); transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}
.feature-card .icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem; margin-bottom: 1.25rem;
  background: var(--accent-glow); color: var(--accent);
}
.feature-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--text-primary); margin-bottom: 0.6rem; }
.feature-card p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }
.feature-card ul { list-style: none; margin-top: 0.75rem; }
.feature-card ul li { color: var(--text-secondary); font-size: 0.85rem; padding: 0.2rem 0; }
.feature-card ul li::before { content: "▸ "; color: var(--accent); font-size: 0.7rem; }

/* ── Architecture diagram ── */
.arch-diagram {
  white-space: normal; font-family: var(--font-sans);
  overflow-x: auto; text-align: center;
  padding: 2rem 1.5rem; border-radius: 20px; margin-bottom: 2rem;
}
.arch-diagram svg { max-width: 100%; height: auto; }

/* ── Architecture endpoint cards ── */
.arch-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem; margin-top: 2rem;
}
.arch-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 1.5rem; text-align: center;
}
.arch-card .label {
  display: inline-block; background: var(--accent-glow); color: var(--accent);
  padding: 0.2rem 0.8rem; border-radius: 6px; font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.05em; margin-bottom: 0.75rem;
}
.arch-card .endpoint { font-family: var(--font-mono); color: #5dade2; font-weight: 600; font-size: 1rem; }
.arch-card .dir { color: var(--text-secondary); font-size: 0.8rem; margin-top: 0.25rem; }
.arch-card .payload { color: var(--text-muted); font-size: 0.78rem; margin-top: 0.5rem; }

/* ── Performance metrics ── */
.perf-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}
.perf-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 1.75rem; text-align: center;
}
.perf-card .metric { font-size: 2.8rem; font-weight: 800; color: var(--accent); line-height: 1; }
.perf-card .metric-label { color: var(--text-secondary); font-size: 0.85rem; margin-top: 0.4rem; }

/* ── Steps / Quick Start ── */
.steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem; counter-reset: step;
}
.step {
  position: relative; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 2rem 1.5rem;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: -14px; left: 1.5rem;
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--accent); color: #000;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 0.9rem;
}
.step h4 { color: var(--text-primary); font-weight: 700; font-size: 1.05rem; margin: 0.5rem 0 0.5rem; }
.step code {
  display: block; background: rgba(0,0,0,0.3); color: #5dade2;
  padding: 0.6rem 1rem; border-radius: 8px; font-size: 0.8rem;
  margin-top: 0.75rem; overflow-x: auto;
}
.step p { color: var(--text-secondary); font-size: 0.85rem; }

/* ── Tech stack tags ── */
.tech-stack { display: flex; flex-wrap: wrap; gap: 0.6rem; justify-content: center; margin: 2rem 0; }
.tech-tag {
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 100px; padding: 0.4rem 1.1rem; font-size: 0.82rem;
  color: var(--text-primary); transition: all 0.2s;
}
.tech-tag:hover { border-color: var(--accent); color: var(--accent); }

/* ── Screen row / cards ── */
.screen-row {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem; margin-top: 2rem;
}
.screen-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 1.5rem;
}
.screen-card h4 { color: var(--text-primary); font-size: 1rem; margin-bottom: 0.75rem; }
.screen-card p { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 0.5rem; line-height: 1.7; }
.screen-card .comp {
  display: inline-block; background: rgba(93,173,226,0.1); color: #5dade2;
  padding: 0.15rem 0.5rem; border-radius: 4px; font-size: 0.72rem;
  margin: 0.15rem; font-family: var(--font-mono);
}

/* ── Footer "Built with" badge ── */
footer .built { color: var(--accent); font-size: 0.78rem; margin-top: 0.75rem; }

/* ── Fade-up animation ── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.animate { animation: fadeUp 0.7s ease-out both; }
.animate:nth-child(2) { animation-delay: 0.1s; }
.animate:nth-child(3) { animation-delay: 0.2s; }
.animate:nth-child(4) { animation-delay: 0.3s; }
.animate:nth-child(5) { animation-delay: 0.4s; }
.animate:nth-child(6) { animation-delay: 0.5s; }

/* ── Smooth section spacing on mobile ── */
@media (max-width: 768px) {
  .section { padding: 4rem 1.25rem; }
  .section-header { margin-bottom: 2.5rem; }
  .hero-title { font-size: 2.25rem; }
  .section-title { font-size: 1.75rem; }
  .features-grid { grid-template-columns: 1fr; }
  .arch-grid { grid-template-columns: 1fr; }
  .screen-row { grid-template-columns: 1fr; }
  .perf-grid { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr; }
}