/* ============================================================
   zhenjieco.com — Main Stylesheet
   Aesthetic : Tesla × Computer Science
   Author    : zhenjieco Studios
   ============================================================ */

/* ===== 0. Design Tokens ===================================== */
:root {
  /* Core palette */
  --bg-0: #000000;
  --bg-1: #050608;
  --bg-2: #0a0c10;
  --bg-3: #101317;
  --bg-4: #16191e;
  --bg-card: #0d1014;
  --bg-glass: rgba(255, 255, 255, 0.03);

  --fg-0: #ffffff;
  --fg-1: #e6e8eb;
  --fg-2: #a8adb4;
  --fg-3: #6b7077;
  --fg-4: #3a3e44;

  --accent: #00d4ff;          /* electric cyan */
  --accent-soft: #6fe6ff;
  --accent-2: #00ffa3;        /* terminal green */
  --accent-3: #ff3b6b;        /* alert magenta */
  --accent-4: #b794ff;        /* synth purple */

  --line: #1c2026;
  --line-bright: #292d35;

  /* Effects */
  --glow-accent: 0 0 32px rgba(0, 212, 255, 0.45);
  --glow-accent-2: 0 0 32px rgba(0, 255, 163, 0.4);
  --glow-magenta: 0 0 32px rgba(255, 59, 107, 0.4);
  --shadow-lg: 0 40px 80px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 18px 36px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.35);

  /* Geometry */
  --r-sm: 6px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;
  --r-full: 999px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 180ms var(--ease-out);
  --t-base: 320ms var(--ease-out);
  --t-slow: 700ms var(--ease-out);
  --t-glide: 1100ms var(--ease-out);

  /* Type */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', ui-monospace, Menlo, Consolas, monospace;
  --font-display: 'Inter', sans-serif;

  /* Layout */
  --container: 1400px;
  --gutter: clamp(20px, 4vw, 56px);
  --nav-h: 76px;
}

/* ===== 1. Reset ============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scrollbar-width: thin; scrollbar-color: var(--accent) var(--bg-0); }
html::-webkit-scrollbar { width: 10px; height: 10px; }
html::-webkit-scrollbar-track { background: var(--bg-0); }
html::-webkit-scrollbar-thumb { background: linear-gradient(180deg, var(--accent), var(--accent-2)); border-radius: var(--r-full); }
body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--fg-1);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
  font-feature-settings: 'ss01', 'cv11', 'kern';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg, video, canvas { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
a { color: inherit; text-decoration: none; transition: color var(--t-fast); }
input, textarea, select { font: inherit; color: inherit; background: none; border: none; outline: none; }
ul, ol { list-style: none; }
::selection { background: var(--accent); color: var(--bg-0); }

/* ===== 2. Global ambient background ======================== */
.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60vw 60vw at 15% 10%, rgba(0, 212, 255, 0.10), transparent 60%),
    radial-gradient(50vw 50vw at 85% 30%, rgba(183, 148, 255, 0.08), transparent 65%),
    radial-gradient(70vw 70vw at 50% 100%, rgba(0, 255, 163, 0.06), transparent 60%),
    var(--bg-0);
}
.ambient::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240' viewBox='0 0 240 240'><defs><pattern id='grid' width='40' height='40' patternUnits='userSpaceOnUse'><path d='M40 0H0V40' fill='none' stroke='%23ffffff' stroke-opacity='0.035' stroke-width='1'/></pattern></defs><rect width='240' height='240' fill='url(%23grid)'/></svg>");
  mask-image: linear-gradient(180deg, transparent, #000 25%, #000 75%, transparent);
}

/* ===== 3. Typography ======================================= */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--fg-0);
}
.h-display {
  font-size: clamp(48px, 8vw, 132px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 0.95;
}
.h-1 { font-size: clamp(40px, 5.2vw, 84px); font-weight: 700; letter-spacing: -0.035em; }
.h-2 { font-size: clamp(32px, 4vw, 60px); font-weight: 700; letter-spacing: -0.03em; }
.h-3 { font-size: clamp(24px, 2.6vw, 40px); font-weight: 600; letter-spacing: -0.02em; }
.h-4 { font-size: clamp(20px, 1.6vw, 26px); font-weight: 600; }
.lead { font-size: clamp(17px, 1.4vw, 22px); color: var(--fg-2); max-width: 720px; line-height: 1.7; }
.text-mono { font-family: var(--font-mono); }
.text-accent { color: var(--accent); }
.text-dim { color: var(--fg-3); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow::before {
  content: '';
  width: 32px; height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.gradient-text {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 50%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===== 4. Layout helpers =================================== */
.container { width: min(100% - var(--gutter) * 2, var(--container)); margin-inline: auto; }
.section { position: relative; padding-block: clamp(80px, 12vw, 160px); }
.section--lg { padding-block: clamp(120px, 16vw, 220px); }
.section--tight { padding-block: clamp(60px, 8vw, 120px); }
.section-head { display: flex; flex-direction: column; gap: 18px; max-width: 900px; margin-bottom: 64px; }
.divider {
  height: 1px;
  width: 100%;
  background: linear-gradient(90deg, transparent, var(--line-bright), transparent);
}

/* ===== 5. Top navigation =================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  display: flex; align-items: center;
  z-index: 1000;
  background: transparent;
  backdrop-filter: blur(0px);
  transition: background var(--t-base), border-color var(--t-base), backdrop-filter var(--t-base);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(5, 6, 8, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--line);
}
.nav__inner {
  width: min(100% - var(--gutter) * 2, var(--container));
  margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px;
}
.nav__brand { display: flex; align-items: center; gap: 12px; }
.nav__logo {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: var(--glow-accent);
  transition: transform var(--t-spring);
}
.nav__brand:hover .nav__logo { transform: rotate(-12deg) scale(1.06); }
.nav__wordmark {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.nav__wordmark span { color: var(--accent); }
.nav__menu { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--fg-2);
  border-radius: var(--r-md);
  transition: color var(--t-fast), background var(--t-fast);
}
.nav__link:hover { color: var(--fg-0); background: var(--bg-glass); }
.nav__link.is-active { color: var(--accent); }
.nav__link.is-active::after {
  content: '';
  position: absolute;
  left: 16px; right: 16px; bottom: 4px;
  height: 1px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}
.nav__actions { display: flex; align-items: center; gap: 10px; }
.nav__toggle { display: none; }

@media (max-width: 960px) {
  .nav__menu {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    padding: 24px var(--gutter);
    background: rgba(5, 6, 8, 0.95);
    backdrop-filter: blur(20px);
    transform: translateY(-110%);
    transition: transform var(--t-base);
    border-bottom: 1px solid var(--line);
    gap: 4px;
  }
  .nav__menu.is-open { transform: translateY(0); }
  .nav__link { padding: 16px; font-size: 18px; }
  .nav__link.is-active::after { display: none; }
  .nav__toggle {
    display: grid; place-items: center;
    width: 44px; height: 44px;
    border-radius: var(--r-md);
    background: var(--bg-glass);
    border: 1px solid var(--line);
  }
  .nav__toggle svg { width: 22px; height: 22px; stroke: var(--fg-0); }
}

/* ===== 6. Buttons ========================================== */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center; justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: var(--r-full);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  border: 1px solid var(--line-bright);
  background: var(--bg-glass);
  color: var(--fg-0);
  cursor: pointer;
  transition: transform var(--t-fast), background var(--t-fast), border-color var(--t-fast), color var(--t-fast);
  overflow: hidden;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); border-color: var(--accent); color: var(--accent); }
.btn__icon { width: 14px; height: 14px; transition: transform var(--t-fast); }
.btn:hover .btn__icon { transform: translateX(4px); }
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: var(--bg-0);
  border-color: transparent;
  box-shadow: var(--glow-accent);
}
.btn--primary:hover { color: var(--bg-0); border-color: transparent; box-shadow: var(--glow-accent-2); }
.btn--ghost { background: transparent; }
.btn--lg { padding: 18px 32px; font-size: 15px; }
.btn--sm { padding: 9px 16px; font-size: 13px; }

/* Magnetic glow follow effect */
.btn::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(0, 212, 255, 0.4), transparent 60%);
  opacity: 0;
  transition: opacity var(--t-base);
  pointer-events: none;
}
.btn:hover::before { opacity: 1; }

/* ===== 7. Hero ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  padding-top: calc(var(--nav-h) + 40px);
  padding-bottom: 80px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
  filter: saturate(1.05) contrast(1.02);
  pointer-events: none;
  animation: heroImgIn 1.6s ease-out both;
}
@keyframes heroImgIn { from { opacity: 0; transform: scale(1.06); } to { opacity: 0.22; transform: scale(1); } }
.hero__canvas {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.85;
}
.hero__canvas svg, .hero__canvas canvas {
  width: 100%; height: 100%;
}
.hero__grid {
  display: grid;
  gap: 40px;
  width: 100%;
}
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 8px 14px 8px 8px;
  border-radius: var(--r-full);
  background: var(--bg-glass);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-2);
  width: max-content;
  margin-bottom: 24px;
  letter-spacing: 0.06em;
}
.hero__eyebrow .pulse {
  position: relative;
  display: inline-block;
  width: 22px; height: 22px;
  border-radius: var(--r-full);
  background: var(--accent);
}
.hero__eyebrow .pulse::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--accent);
  animation: pulse 2s ease-out infinite;
}
.hero__title {
  margin-bottom: 24px;
}
.hero__title .line {
  display: block;
  overflow: hidden;
}
.hero__title .line > span {
  display: inline-block;
  transform: translateY(110%);
  animation: rise 1.1s var(--ease-out) forwards;
}
.hero__title .line:nth-child(2) > span { animation-delay: 0.12s; }
.hero__title .line:nth-child(3) > span { animation-delay: 0.24s; }
.hero__title .accent { color: var(--accent); }
.hero__subtitle {
  max-width: 640px;
  font-size: clamp(16px, 1.2vw, 19px);
  color: var(--fg-2);
  line-height: 1.7;
  margin-bottom: 40px;
}
.hero__cta {
  display: flex; flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 64px;
}
.hero__metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
  padding-top: 36px;
}
.hero__metric {
  padding: 0 24px;
  border-left: 1px solid var(--line);
}
.hero__metric:first-child { border-left: 0; padding-left: 0; }
.hero__metric .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3vw, 42px);
  font-weight: 700;
  color: var(--fg-0);
  letter-spacing: -0.02em;
}
.hero__metric .num::after { content: attr(data-suffix); color: var(--accent); }
.hero__metric .label {
  font-size: 12px;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-family: var(--font-mono);
  margin-top: 6px;
  display: block;
}
.hero__scroll {
  position: absolute;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--fg-3);
  text-transform: uppercase;
}
.hero__scroll .line-anim {
  width: 1px; height: 60px;
  background: linear-gradient(180deg, var(--accent), transparent);
  position: relative;
  overflow: hidden;
}
.hero__scroll .line-anim::before {
  content: ''; position: absolute; inset: 0;
  background: var(--fg-0);
  animation: scan 2.4s var(--ease-in-out) infinite;
}
@media (max-width: 720px) {
  .hero__metric { padding: 0 12px; }
  .hero__metric:first-child { padding-left: 0; }
}

/* ===== 8. Section reveal =================================== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }
.reveal--left { transform: translateX(-40px); }
.reveal--right { transform: translateX(40px); }
.reveal--scale { transform: scale(0.92); }
.reveal.is-visible.reveal--left,
.reveal.is-visible.reveal--right { transform: none; }
.reveal.is-visible.reveal--scale { transform: scale(1); }

.stagger > * { opacity: 0; transform: translateY(20px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.stagger.is-visible > *:nth-child(1) { opacity: 1; transform: none; transition-delay: 0.05s; }
.stagger.is-visible > *:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.15s; }
.stagger.is-visible > *:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.25s; }
.stagger.is-visible > *:nth-child(4) { opacity: 1; transform: none; transition-delay: 0.35s; }
.stagger.is-visible > *:nth-child(5) { opacity: 1; transform: none; transition-delay: 0.45s; }
.stagger.is-visible > *:nth-child(6) { opacity: 1; transform: none; transition-delay: 0.55s; }
.stagger.is-visible > *:nth-child(7) { opacity: 1; transform: none; transition-delay: 0.65s; }
.stagger.is-visible > *:nth-child(8) { opacity: 1; transform: none; transition-delay: 0.75s; }

/* ===== 9. Marquee strip ==================================== */
.marquee {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 28px 0;
  background: var(--bg-1);
}
.marquee__track {
  display: flex;
  gap: 64px;
  width: max-content;
  animation: marquee 40s linear infinite;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  align-items: center;
}
.marquee__track span { display: inline-flex; align-items: center; gap: 12px; }
.marquee__track .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: var(--glow-accent);
}

/* ===== 10. Cards (values / services / apps) ================ */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1080px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 720px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px;
  overflow: hidden;
  isolation: isolate;
  transition: transform var(--t-base), border-color var(--t-base), background var(--t-base);
}
.card::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(0, 212, 255, 0.12), transparent 50%);
  opacity: 0;
  transition: opacity var(--t-base);
  pointer-events: none;
  z-index: -1;
}
.card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.4), rgba(0, 255, 163, 0.2), transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--t-base);
  pointer-events: none;
}
.card:hover { transform: translateY(-4px); border-color: var(--line-bright); }
.card:hover::before { opacity: 1; }
.card:hover::after { opacity: 1; }

.card__icon {
  width: 56px; height: 56px;
  display: grid; place-items: center;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.12), rgba(0, 255, 163, 0.08));
  border: 1px solid var(--line-bright);
  margin-bottom: 24px;
  color: var(--accent);
  transition: transform var(--t-spring);
}
.card:hover .card__icon { transform: rotate(-6deg) scale(1.08); }
.card__icon svg { width: 26px; height: 26px; }
.card__title { font-size: 22px; font-weight: 600; margin-bottom: 12px; }
.card__text { color: var(--fg-2); line-height: 1.7; font-size: 15px; }
.card__meta {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--fg-3);
  letter-spacing: 0.08em;
}
.card__meta .arrow {
  width: 32px; height: 32px;
  border-radius: var(--r-full);
  background: var(--bg-3);
  display: grid; place-items: center;
  transition: background var(--t-base), transform var(--t-spring);
}
.card:hover .card__meta .arrow { background: var(--accent); color: var(--bg-0); transform: translateX(4px); }
.card__meta .arrow svg { width: 14px; height: 14px; }

/* ===== 11. App showcase ==================================== */
.apps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.app {
  position: relative;
  background: linear-gradient(180deg, var(--bg-card), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 0;
  overflow: hidden;
  transition: transform var(--t-base), border-color var(--t-base);
}
.app:hover { transform: translateY(-6px); border-color: var(--accent); }
.app__visual {
  aspect-ratio: 16 / 11;
  position: relative;
  background: var(--bg-2);
  overflow: hidden;
}
.app__visual svg { width: 100%; height: 100%; display: block; }
.app__platform {
  position: absolute; top: 12px; left: 12px;
  padding: 5px 10px;
  border-radius: var(--r-full);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-1);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.app__price {
  position: absolute; top: 12px; right: 12px;
  padding: 5px 10px;
  border-radius: var(--r-full);
  background: var(--accent);
  color: var(--bg-0);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.app__body { padding: 22px 22px 24px; }
.app__title { font-size: 18px; margin-bottom: 6px; }
.app__desc { color: var(--fg-3); font-size: 13px; line-height: 1.6; }
.app__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.app__tag {
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: var(--r-full);
  background: var(--bg-3);
  color: var(--fg-2);
  border: 1px solid var(--line);
}

/* ===== 12. Tech spec table ================================ */
.spec {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--bg-card);
}
.spec__row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  padding: 22px 28px;
  border-bottom: 1px solid var(--line);
  align-items: center;
  transition: background var(--t-base);
}
.spec__row:last-child { border-bottom: none; }
.spec__row:hover { background: var(--bg-3); }
.spec__k {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent);
}
.spec__v { color: var(--fg-1); }
@media (max-width: 720px) { .spec__row { grid-template-columns: 1fr; gap: 8px; padding: 18px 20px; } }

/* ===== 13. Process timeline =============================== */
.process {
  position: relative;
  display: grid;
  gap: 0;
}
.process::before {
  content: '';
  position: absolute;
  left: 50%; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line-bright) 10%, var(--line-bright) 90%, transparent);
}
.process__step {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  gap: 32px;
  align-items: center;
  padding: 40px 0;
}
.process__step .num {
  grid-column: 2;
  display: grid; place-items: center;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--line-bright);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
  color: var(--accent);
  z-index: 1;
  transition: background var(--t-base), color var(--t-base);
}
.process__step:hover .num { background: var(--accent); color: var(--bg-0); box-shadow: var(--glow-accent); }
.process__step .body { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 24px; }
.process__step:nth-child(even) .body { grid-column: 3; grid-row: 1; }
.process__step:nth-child(even) .body--left { grid-column: 1; grid-row: 1; }
.process__step:nth-child(odd) .body { grid-column: 1; }
.process__step .body + .body { display: none; }
@media (max-width: 820px) {
  .process::before { left: 28px; }
  .process__step { grid-template-columns: 56px 1fr; gap: 24px; padding: 24px 0; }
  .process__step .num { grid-column: 1; grid-row: 1; }
  .process__step .body { grid-column: 2; grid-row: 1; }
  .process__step:nth-child(even) .body { grid-column: 2; }
}

/* ===== 14. Stats grid ====================================== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat { padding: 48px 32px; border-left: 1px solid var(--line); position: relative; overflow: hidden; }
.stat:first-child { border-left: none; }
.stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(36px, 4vw, 60px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg-0);
  margin-bottom: 8px;
}
.stat__num .accent { color: var(--accent); }
.stat__label { font-size: 14px; color: var(--fg-2); max-width: 220px; line-height: 1.5; }
.stat__bg {
  position: absolute; inset: 0;
  background: radial-gradient(circle at 100% 100%, rgba(0, 212, 255, 0.07), transparent 60%);
  pointer-events: none;
}
@media (max-width: 980px) { .stats { grid-template-columns: repeat(2, 1fr); } .stat:nth-child(3) { border-left: none; } .stat { border-top: 1px solid var(--line); } }
@media (max-width: 540px) { .stats { grid-template-columns: 1fr; } .stat { border-left: none; border-top: 1px solid var(--line); } }

/* ===== 15. CTA banner ====================================== */
.cta {
  position: relative;
  padding: 80px 56px;
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, var(--bg-3), var(--bg-2));
  border: 1px solid var(--line-bright);
  overflow: hidden;
  isolation: isolate;
}
.cta::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(40vw 40vw at 100% 0%, rgba(0, 212, 255, 0.18), transparent 60%),
    radial-gradient(30vw 30vw at 0% 100%, rgba(183, 148, 255, 0.12), transparent 60%);
  z-index: -1;
}
.cta::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(50% 50% at 50% 50%, #000, transparent);
  z-index: -1;
}
.cta__inner { display: flex; flex-direction: column; gap: 24px; align-items: flex-start; }
.cta__title { font-size: clamp(34px, 4vw, 60px); font-weight: 700; letter-spacing: -0.03em; max-width: 760px; line-height: 1.05; }
.cta__desc { color: var(--fg-2); max-width: 580px; }
@media (max-width: 720px) { .cta { padding: 56px 28px; } }

/* ===== 16. Articles / News ================================= */
.news {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 1080px) { .news { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 720px) { .news { grid-template-columns: 1fr; } }

.post {
  display: flex; flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform var(--t-base), border-color var(--t-base);
}
.post:hover { transform: translateY(-6px); border-color: var(--accent); }
.post__cover { aspect-ratio: 16 / 9; position: relative; background: var(--bg-2); overflow: hidden; }
.post__cover svg { width: 100%; height: 100%; }
.post__cover::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.5));
}
.post__body { padding: 28px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.post__meta { display: flex; justify-content: space-between; align-items: center; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-3); }
.post__category { color: var(--accent); }
.post__title { font-size: 22px; line-height: 1.3; color: var(--fg-0); }
.post__excerpt { color: var(--fg-2); font-size: 14px; line-height: 1.6; }
.post__more { margin-top: auto; display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--accent); padding-top: 12px; }
.post__more svg { width: 14px; height: 14px; transition: transform var(--t-fast); }
.post:hover .post__more svg { transform: translateX(6px); }

/* ===== 17. Forms =========================================== */
.form { display: grid; gap: 18px; max-width: 640px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.field input, .field textarea, .field select {
  padding: 14px 18px;
  border: 1px solid var(--line);
  background: var(--bg-card);
  border-radius: var(--r-md);
  color: var(--fg-0);
  font-size: 15px;
  transition: border-color var(--t-base), box-shadow var(--t-base);
}
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}
.field textarea { min-height: 140px; resize: vertical; font-family: var(--font-sans); }
.field--row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 600px) { .field--row { grid-template-columns: 1fr; } }

/* ===== 18. Footer ========================================== */
.footer {
  position: relative;
  margin-top: 80px;
  padding: 80px 0 32px;
  background: var(--bg-1);
  border-top: 1px solid var(--line);
  overflow: hidden;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 980px) { .footer__top { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer__top { grid-template-columns: 1fr; } }

.footer__brand { max-width: 320px; }
.footer__brand p { color: var(--fg-3); font-size: 14px; line-height: 1.7; margin-top: 16px; }
.footer__heading {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.footer__list { display: flex; flex-direction: column; gap: 10px; }
.footer__list a { color: var(--fg-2); font-size: 14px; }
.footer__list a:hover { color: var(--fg-0); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--fg-3);
}
.footer__legal { display: flex; gap: 24px; flex-wrap: wrap; }
.footer__legal a:hover { color: var(--fg-0); }

/* ===== 19. Featured split (image left/right) ============== */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
@media (max-width: 980px) { .split { grid-template-columns: 1fr; gap: 48px; } }
.split--reverse { direction: rtl; }
.split--reverse > * { direction: ltr; }
@media (max-width: 980px) { .split--reverse { direction: ltr; } }
.split__art {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--line);
}
.split__art svg { width: 100%; height: 100%; }
.split__copy { display: flex; flex-direction: column; gap: 18px; }
.split__list { display: flex; flex-direction: column; gap: 12px; margin-top: 8px; }
.split__list li {
  display: flex; align-items: flex-start; gap: 12px;
  color: var(--fg-1);
  font-size: 15px;
  line-height: 1.6;
}
.split__list li .check {
  flex-shrink: 0;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(0, 255, 163, 0.12);
  border: 1px solid rgba(0, 255, 163, 0.3);
  display: grid; place-items: center;
  color: var(--accent-2);
}
.split__list li .check svg { width: 12px; height: 12px; }

/* ===== 20. Tabs / categories ============================== */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 8px 14px;
  border-radius: var(--r-full);
  background: var(--bg-card);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--fg-2);
  cursor: pointer;
  transition: all var(--t-fast);
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.is-active { background: var(--accent); color: var(--bg-0); border-color: var(--accent); }

/* ===== 21. Terminal/code block ============================= */
.terminal {
  font-family: var(--font-mono);
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.terminal__bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--line);
}
.terminal__bar .dot {
  width: 11px; height: 11px;
  border-radius: 50%;
}
.terminal__bar .dot.r { background: #ff5f57; }
.terminal__bar .dot.y { background: #febc2e; }
.terminal__bar .dot.g { background: #28c840; }
.terminal__bar .title { margin-left: 12px; font-size: 12px; color: var(--fg-3); }
.terminal__body {
  padding: 24px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-1);
  white-space: pre-wrap;
  overflow-x: auto;
}
.terminal__body .k { color: var(--accent); }
.terminal__body .s { color: var(--accent-2); }
.terminal__body .c { color: var(--fg-3); font-style: italic; }
.terminal__body .n { color: var(--accent-4); }
.terminal__body .b { font-weight: 700; }

/* ===== 22. Glitch text ===================================== */
.glitch {
  position: relative;
  display: inline-block;
}
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.glitch::before {
  color: var(--accent-3);
  transform: translate(-2px, 0);
  mix-blend-mode: screen;
  animation: glitch-x 2.6s infinite steps(1);
  opacity: 0.6;
}
.glitch::after {
  color: var(--accent);
  transform: translate(2px, 0);
  mix-blend-mode: screen;
  animation: glitch-y 3.4s infinite steps(1);
  opacity: 0.5;
}
@keyframes glitch-x {
  0%, 88%, 100% { transform: translate(0, 0); }
  90% { transform: translate(-3px, 1px); }
  92% { transform: translate(2px, -1px); }
  94% { transform: translate(-1px, 2px); }
}
@keyframes glitch-y {
  0%, 82%, 100% { transform: translate(0, 0); }
  84% { transform: translate(2px, -1px); }
  86% { transform: translate(-2px, 1px); }
  88% { transform: translate(1px, -2px); }
}

/* ===== 23. Loading screen ================================== */
.loader {
  position: fixed;
  inset: 0;
  background: var(--bg-0);
  display: grid;
  place-items: center;
  z-index: 9999;
  transition: opacity 0.6s var(--ease-out), visibility 0.6s var(--ease-out);
}
.loader.is-done { opacity: 0; visibility: hidden; }
.loader__inner { display: flex; flex-direction: column; gap: 24px; align-items: center; }
.loader__brand { display: flex; gap: 12px; align-items: center; font-family: var(--font-mono); font-weight: 700; }
.loader__bar {
  width: 240px; height: 2px;
  background: var(--bg-3);
  border-radius: var(--r-full);
  overflow: hidden;
  position: relative;
}
.loader__bar::after {
  content: '';
  position: absolute;
  inset: 0;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  animation: loadbar 1.6s var(--ease-out) forwards;
}
.loader__num { font-family: var(--font-mono); font-size: 12px; color: var(--fg-3); letter-spacing: 0.12em; }

/* ===== 24. Cursor halo (desktop only) ====================== */
@media (hover: hover) and (pointer: fine) {
  .cursor {
    position: fixed;
    width: 32px; height: 32px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    transition: width 0.25s var(--ease-out), height 0.25s var(--ease-out), transform 0.08s linear, border-color 0.25s var(--ease-out);
    mix-blend-mode: difference;
    transform: translate(-50%, -50%);
  }
  .cursor.is-hover { width: 60px; height: 60px; border-color: var(--accent-2); background: rgba(0, 255, 163, 0.08); }
  .cursor.is-press { transform: translate(-50%, -50%) scale(0.8); }
}

/* ===== 25. Document / Legal pages ========================== */
.doc {
  max-width: 920px;
  margin: 0 auto;
  padding: calc(var(--nav-h) + 80px) 24px 120px;
}
.doc__nav {
  display: flex; gap: 14px; margin-bottom: 48px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
}
.doc__nav a { color: var(--accent); }
.doc h1 {
  font-size: clamp(36px, 4.5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
  line-height: 1.05;
}
.doc__lede { font-size: 17px; color: var(--fg-2); margin-bottom: 24px; }
.doc__meta {
  display: flex; gap: 16px; flex-wrap: wrap;
  font-family: var(--font-mono); font-size: 12px;
  color: var(--fg-3); letter-spacing: 0.08em;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}
.doc h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 56px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  letter-spacing: -0.02em;
}
.doc h2:first-of-type { margin-top: 24px; padding-top: 24px; border-top: 0; }
.doc h3 { font-size: 18px; font-weight: 600; margin: 28px 0 10px; color: var(--accent); }
.doc p { color: var(--fg-1); line-height: 1.85; margin-bottom: 14px; font-size: 15.5px; }
.doc ul, .doc ol { margin: 14px 0 14px 24px; color: var(--fg-1); }
.doc li { line-height: 1.75; margin-bottom: 6px; font-size: 15.5px; }
.doc ul li { list-style: disc; }
.doc ol li { list-style: decimal; }
.doc ul li::marker, .doc ol li::marker { color: var(--accent); }
.doc strong { color: var(--fg-0); font-weight: 700; }
.doc em { color: var(--fg-2); font-style: italic; }
.doc code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 2px 6px;
  background: var(--bg-3);
  border-radius: 4px;
  color: var(--accent);
}
.doc hr {
  margin: 56px 0;
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-bright), transparent);
}
.doc__toc {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px;
  margin-bottom: 56px;
}
.doc__toc ol { list-style: none; counter-reset: t; margin: 0; }
.doc__toc li {
  counter-increment: t;
  display: flex; gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}
.doc__toc li:last-child { border-bottom: 0; }
.doc__toc li::before {
  content: counter(t, decimal-leading-zero);
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 700;
}
.doc__toc a { color: var(--fg-1); }
.doc__toc a:hover { color: var(--accent); }
.doc__badge {
  display: inline-block;
  margin-top: 4px;
  padding: 4px 10px;
  border-radius: var(--r-full);
  background: rgba(0, 212, 255, 0.12);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}
.doc__contact {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px;
  margin-top: 28px;
  display: flex; flex-direction: column; gap: 10px;
}
.doc__contact a { color: var(--accent); }
.doc__back {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--fg-3); font-size: 13px;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 24px;
  transition: color var(--t-fast), gap var(--t-fast);
}
.doc__back:hover { color: var(--accent); gap: 14px; }
.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 14px;
}
.doc th, .doc td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}
.doc th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--bg-2);
}
.doc__adtag {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  background: rgba(255, 59, 107, 0.12);
  color: var(--accent-3);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  margin-right: 4px;
  margin-bottom: 4px;
}
.doc__adtag.t2 { background: rgba(183, 148, 255, 0.12); color: var(--accent-4); }
.doc__adtag.t3 { background: rgba(0, 255, 163, 0.12); color: var(--accent-2); }
.doc__adtag.t4 { background: rgba(0, 212, 255, 0.12); color: var(--accent); }

/* ===== 26. Tilt card effect ================================ */
.tilt {
  transform-style: preserve-3d;
  transition: transform 0.3s var(--ease-out);
}

/* ===== 27. Filter list (news page) ========================= */
.filterbar {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
  gap: 18px;
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

/* ===== 28. Contact layout ================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
}
@media (max-width: 980px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  gap: 16px;
  transition: border-color var(--t-base), background var(--t-base);
}
.contact-card:hover { border-color: var(--accent); background: var(--bg-3); }
.contact-card__icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: var(--r-md);
  background: rgba(0, 212, 255, 0.08);
  color: var(--accent);
  flex-shrink: 0;
}
.contact-card__icon svg { width: 22px; height: 22px; }
.contact-card__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 4px;
}
.contact-card__val { font-size: 16px; color: var(--fg-0); font-weight: 500; word-break: break-word; }
.contact-card__val a:hover { color: var(--accent); }

/* ===== 29. Helpers ========================================= */
.text-center { text-align: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.mt-8 { margin-top: 32px; }
.mt-12 { margin-top: 48px; }
.mt-16 { margin-top: 64px; }
.mb-8 { margin-bottom: 32px; }
.mb-12 { margin-bottom: 48px; }
.mb-16 { margin-bottom: 64px; }
.gap-12 { gap: 48px; }
.gap-8 { gap: 32px; }
.relative { position: relative; }
.glow { box-shadow: var(--glow-accent); }
.hide-mobile { display: initial; }
.show-mobile { display: none; }
@media (max-width: 720px) { .hide-mobile { display: none; } .show-mobile { display: initial; } }