/* =========================================================
   zebrabeta — design system
   ========================================================= */

:root {
  --bg: #07080d;
  --bg-2: #0c0e16;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f4f6fb;
  --muted: #9aa3b8;
  --faint: #5d6478;

  --accent: #7c5cff;
  --accent-2: #15e0c8;
  --accent-3: #ff5c87;
  --grad: linear-gradient(120deg, #7c5cff 0%, #15e0c8 100%);
  --grad-soft: linear-gradient(120deg, rgba(124, 92, 255, 0.18), rgba(21, 224, 200, 0.14));

  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1180px;
  --shadow: 0 30px 80px -30px rgba(0, 0, 0, 0.8);

  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ambient background glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(900px 600px at 12% -5%, rgba(124, 92, 255, 0.16), transparent 60%),
    radial-gradient(820px 560px at 95% 0%, rgba(21, 224, 200, 0.12), transparent 55%),
    radial-gradient(700px 700px at 70% 110%, rgba(255, 92, 135, 0.08), transparent 60%);
  z-index: -2;
  pointer-events: none;
}

/* faint grid */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
  z-index: -1;
  pointer-events: none;
}

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

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- typography ---------- */
h1, h2, h3 { line-height: 1.1; margin: 0 0 0.5em; letter-spacing: -0.02em; font-weight: 700; }
h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.9rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; color: var(--muted); }

.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent-2);
  opacity: 0.7;
}

.lead { font-size: 1.18rem; color: var(--muted); max-width: 60ch; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad);
  color: #05060a;
  box-shadow: 0 14px 40px -14px rgba(124, 92, 255, 0.8);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 22px 50px -16px rgba(21, 224, 200, 0.7); }
.btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { transform: translateY(-2px); background: var(--surface-2); }
.btn-arrow { transition: transform 0.25s ease; }
.btn:hover .btn-arrow { transform: translateX(4px); }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(7, 8, 13, 0.6);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.nav.scrolled { border-bottom-color: var(--border); background: rgba(7, 8, 13, 0.82); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; }
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--grad);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 20px -6px rgba(124, 92, 255, 0.7);
  flex-shrink: 0;
}
/* zebra stripes inside the mark */
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg, rgba(5,6,10,0.92) 0 4px, transparent 4px 9px);
}
.brand span { color: var(--text); }
.brand b { font-weight: 800; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 9px 14px;
  border-radius: 9px;
  font-size: 0.92rem;
  color: var(--muted);
  font-weight: 500;
  transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:hover { color: var(--text); background: var(--surface); }
.nav-links a.active { color: var(--text); background: var(--surface-2); }
.nav-cta { margin-left: 10px; }

.nav-toggle { display: none; background: none; border: 0; color: var(--text); cursor: pointer; padding: 8px; }
.nav-toggle svg { width: 26px; height: 26px; }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute;
    top: 72px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 24px 22px;
    background: rgba(9, 10, 17, 0.97);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 12px 14px; font-size: 1rem; }
  .nav-cta { margin: 8px 0 0; justify-content: center; }
}

/* ---------- sections ---------- */
section { position: relative; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-head { max-width: 620px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

/* ---------- hero ---------- */
.hero { padding: 84px 0 40px; position: relative; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
@media (max-width: 980px) { .hero-grid { grid-template-columns: 1fr; gap: 48px; } }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 14px 7px 8px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 26px;
}
.pill .tag {
  background: var(--grad);
  color: #05060a;
  font-weight: 700;
  font-size: 0.72rem;
  padding: 3px 9px;
  border-radius: 999px;
}
.hero p.lead { margin-top: 22px; }
.hero-actions { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 36px; margin-top: 52px; flex-wrap: wrap; }
.stat .num { font-size: 1.9rem; font-weight: 800; letter-spacing: -0.03em; }
.stat .lbl { font-size: 0.82rem; color: var(--faint); text-transform: uppercase; letter-spacing: 0.08em; }

/* ---------- device mockups ---------- */
.devices { position: relative; min-height: 460px; }

/* mac window */
.mac {
  border-radius: 14px;
  border: 1px solid var(--border-strong);
  background: linear-gradient(180deg, #11131d, #0a0b12);
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: perspective(1600px) rotateY(-9deg) rotateX(3deg);
  transition: transform 0.6s cubic-bezier(0.2,0.7,0.2,1);
}
.devices:hover .mac { transform: perspective(1600px) rotateY(-5deg) rotateX(1deg); }
.mac-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.mac-bar .url {
  margin-left: 12px;
  font-size: 0.72rem;
  color: var(--faint);
  background: rgba(255,255,255,0.04);
  padding: 4px 12px;
  border-radius: 7px;
  font-family: var(--mono);
}
.mac-body { padding: 16px; }

/* app UI inside mac */
.app {
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 12px;
  min-height: 250px;
}
.app-side { display: flex; flex-direction: column; gap: 7px; }
.app-side .logo { display: flex; align-items: center; gap: 7px; font-size: 0.72rem; font-weight: 700; margin-bottom: 6px; }
.app-side .logo i { width: 16px; height: 16px; border-radius: 5px; background: var(--grad); }
.nav-item {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.68rem; color: var(--muted);
  padding: 6px 8px; border-radius: 7px;
}
.nav-item .ic { width: 11px; height: 11px; border-radius: 3px; background: var(--surface-2); }
.nav-item.on { background: var(--grad-soft); color: var(--text); }
.nav-item.on .ic { background: var(--accent-2); }

.app-main { display: flex; flex-direction: column; gap: 10px; }
.app-h { display: flex; align-items: center; justify-content: space-between; }
.app-h .t { font-size: 0.8rem; font-weight: 700; }
.app-h .live {
  font-size: 0.6rem; color: var(--accent-2);
  display: inline-flex; align-items: center; gap: 5px;
  background: rgba(21,224,200,0.1); padding: 3px 8px; border-radius: 999px;
}
.app-h .live::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); animation: pulse 1.6s infinite; }

/* agent workflow nodes */
.flow { position: relative; display: flex; flex-direction: column; gap: 8px; }
.agent-row {
  display: flex; align-items: center; gap: 9px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 9px; padding: 8px 10px;
  opacity: 0;
  transform: translateY(8px);
  animation: rowIn 0.5s forwards;
}
.agent-row:nth-child(1) { animation-delay: 0.2s; }
.agent-row:nth-child(2) { animation-delay: 0.6s; }
.agent-row:nth-child(3) { animation-delay: 1.0s; }
.agent-row:nth-child(4) { animation-delay: 1.4s; }
.agent-ic {
  width: 22px; height: 22px; border-radius: 7px; flex-shrink: 0;
  background: var(--grad-soft); border: 1px solid var(--border);
  display: grid; place-items: center; font-size: 0.6rem;
}
.agent-meta { flex: 1; min-width: 0; }
.agent-meta .n { font-size: 0.66rem; font-weight: 600; }
.agent-meta .bar { height: 4px; border-radius: 99px; background: var(--surface-2); margin-top: 5px; overflow: hidden; }
.agent-meta .bar i { display: block; height: 100%; background: var(--grad); width: 0; animation: fill 1.6s forwards; }
.agent-row:nth-child(1) .bar i { animation-delay: 0.4s; --w: 100%; }
.agent-row:nth-child(2) .bar i { animation-delay: 0.8s; --w: 82%; }
.agent-row:nth-child(3) .bar i { animation-delay: 1.2s; --w: 64%; }
.agent-row:nth-child(4) .bar i { animation-delay: 1.6s; --w: 38%; }
.agent-st { font-size: 0.58rem; color: var(--accent-2); white-space: nowrap; }
.agent-st.run { color: var(--accent); }

/* iphone */
.iphone {
  position: absolute;
  right: -18px; bottom: -40px;
  width: 168px;
  border-radius: 30px;
  padding: 8px;
  background: linear-gradient(170deg, #1a1d2b, #0a0b12);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow);
  transform: perspective(1400px) rotateY(-10deg) translateZ(40px);
  transition: transform 0.6s cubic-bezier(0.2,0.7,0.2,1);
}
.devices:hover .iphone { transform: perspective(1400px) rotateY(-6deg) translateZ(40px) translateY(-6px); }
@media (max-width: 1180px) { .iphone { right: -6px; } }
@media (max-width: 600px) { .iphone { display: none; } }
.iphone-screen {
  border-radius: 24px;
  background: linear-gradient(180deg, #0d0f18, #0a0b12);
  overflow: hidden;
  position: relative;
  padding: 26px 12px 14px;
}
.iphone-notch {
  position: absolute; top: 9px; left: 50%; transform: translateX(-50%);
  width: 52px; height: 15px; border-radius: 99px; background: #05060a;
}
.ip-h { font-size: 0.62rem; font-weight: 700; margin-bottom: 3px; }
.ip-sub { font-size: 0.52rem; color: var(--faint); margin-bottom: 12px; }
.ip-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 11px; padding: 9px; margin-bottom: 8px;
}
.ip-card .top { display: flex; justify-content: space-between; align-items: center; }
.ip-card .lab { font-size: 0.55rem; color: var(--muted); }
.ip-card .val { font-size: 0.92rem; font-weight: 800; letter-spacing: -0.02em; }
.ip-card .chip { font-size: 0.48rem; color: var(--accent-2); background: rgba(21,224,200,0.1); padding: 2px 6px; border-radius: 99px; }
.ip-spark { display: flex; align-items: flex-end; gap: 3px; height: 30px; margin-top: 8px; }
.ip-spark i { flex: 1; background: var(--grad); border-radius: 3px 3px 0 0; opacity: 0.85; animation: spark 1.8s ease-in-out infinite; }

@keyframes spark { 0%,100% { transform: scaleY(0.55); } 50% { transform: scaleY(1); } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.25; } }
@keyframes rowIn { to { opacity: 1; transform: translateY(0); } }
@keyframes fill { to { width: var(--w, 100%); } }

/* floating glow orbs behind devices */
.orb { position: absolute; border-radius: 50%; filter: blur(50px); opacity: 0.5; z-index: -1; }
.orb.a { width: 260px; height: 260px; background: var(--accent); top: -40px; left: -30px; animation: float 9s ease-in-out infinite; }
.orb.b { width: 220px; height: 220px; background: var(--accent-2); bottom: -30px; right: 0; animation: float 11s ease-in-out infinite reverse; }
@keyframes float { 0%,100% { transform: translate(0,0); } 50% { transform: translate(18px,-22px); } }

/* ---------- marquee logos ---------- */
.marquee { overflow: hidden; padding: 28px 0; border-block: 1px solid var(--border); margin-top: 28px; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; gap: 60px; width: max-content; animation: scroll 26s linear infinite; }
.marquee-track span { color: var(--faint); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; white-space: nowrap; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ---------- cards / grid ---------- */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease, background 0.35s ease;
}
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(124,92,255,0.12), transparent 45%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}
.card:hover { transform: translateY(-5px); border-color: var(--border-strong); background: var(--surface-2); }
.card:hover::after { opacity: 1; }
.card .ic {
  width: 46px; height: 46px; border-radius: 13px;
  background: var(--grad-soft); border: 1px solid var(--border);
  display: grid; place-items: center; margin-bottom: 18px;
  font-size: 1.3rem;
}
.card h3 { margin-bottom: 8px; }
.card p { margin: 0; font-size: 0.96rem; }

.card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; font-weight: 600; color: var(--accent-2); font-size: 0.9rem; }
.card-link svg { width: 15px; height: 15px; transition: transform 0.25s ease; }
.card:hover .card-link svg { transform: translateX(4px); }

/* feature split */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split.rev .split-visual { order: -1; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 36px; } .split.rev .split-visual { order: 0; } }

/* animated visual panel */
.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  padding: 26px;
  min-height: 300px;
  position: relative;
  overflow: hidden;
}
.panel-glow { position: absolute; inset: 0; background: var(--grad-soft); opacity: 0.4; }

/* orbiting nodes animation */
.orbit { position: relative; height: 280px; display: grid; place-items: center; }
.orbit .core {
  width: 84px; height: 84px; border-radius: 22px;
  background: var(--grad); display: grid; place-items: center;
  font-weight: 800; color: #05060a; z-index: 3;
  box-shadow: 0 0 60px -8px rgba(124,92,255,0.7);
  animation: breathe 4s ease-in-out infinite;
}
@keyframes breathe { 0%,100% { transform: scale(1); } 50% { transform: scale(1.06); } }
.ring { position: absolute; border: 1px dashed var(--border-strong); border-radius: 50%; }
.ring.r1 { width: 170px; height: 170px; animation: spin 14s linear infinite; }
.ring.r2 { width: 250px; height: 250px; animation: spin 22s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
.node {
  position: absolute; width: 38px; height: 38px; border-radius: 11px;
  background: var(--surface-2); border: 1px solid var(--border-strong);
  display: grid; place-items: center; font-size: 0.85rem;
  backdrop-filter: blur(6px);
}
.r1 .node { top: -19px; left: 50%; margin-left: -19px; }
.r1 .node.n2 { top: auto; bottom: -19px; }
.r2 .node { top: 50%; margin-top: -19px; left: -19px; }
.r2 .node.n2 { left: auto; right: -19px; }

/* terminal block */
.terminal {
  background: #06070c; border: 1px solid var(--border);
  border-radius: var(--radius-sm); overflow: hidden; font-family: var(--mono);
  font-size: 0.82rem;
}
.terminal .bar { display: flex; gap: 7px; padding: 11px 14px; border-bottom: 1px solid var(--border); }
.terminal .body { padding: 16px; line-height: 1.8; }
.terminal .ln { color: var(--muted); white-space: pre-wrap; }
.terminal .ln .pr { color: var(--accent-2); }
.terminal .ln .ok { color: #28c840; }
.terminal .ln .kw { color: var(--accent); }
.cursor { display: inline-block; width: 8px; height: 1.1em; background: var(--accent-2); vertical-align: text-bottom; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- list / steps ---------- */
.steps { display: grid; gap: 14px; counter-reset: s; }
.step {
  display: flex; gap: 16px; padding: 20px 22px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.step:hover { border-color: var(--border-strong); transform: translateX(4px); }
.step .idx {
  counter-increment: s; flex-shrink: 0;
  width: 34px; height: 34px; border-radius: 10px;
  background: var(--grad-soft); border: 1px solid var(--border);
  display: grid; place-items: center; font-weight: 800; font-size: 0.9rem;
}
.step .idx::before { content: counter(s, decimal-leading-zero); }
.step h3 { margin-bottom: 4px; font-size: 1.05rem; }
.step p { margin: 0; font-size: 0.94rem; }

/* ---------- pricing ---------- */
.price-card { display: flex; flex-direction: column; }
.price-card.feat { border-color: var(--accent); background: var(--grad-soft); }
.price-card .plan { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--accent-2); font-weight: 700; }
.price-card .amt { font-size: 2.6rem; font-weight: 800; letter-spacing: -0.03em; margin: 10px 0 2px; }
.price-card .amt small { font-size: 0.95rem; color: var(--faint); font-weight: 500; }
.price-card ul { list-style: none; padding: 0; margin: 22px 0; display: grid; gap: 11px; }
.price-card li { display: flex; gap: 10px; font-size: 0.92rem; color: var(--muted); }
.price-card li::before { content: "✓"; color: var(--accent-2); font-weight: 800; }
.price-card .btn { margin-top: auto; justify-content: center; }

/* ---------- cta banner ---------- */
.cta {
  border: 1px solid var(--border-strong);
  border-radius: 26px;
  background: var(--grad-soft);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute; inset: 0;
  background: repeating-linear-gradient(115deg, rgba(255,255,255,0.03) 0 2px, transparent 2px 20px);
  pointer-events: none;
}
.cta h2 { margin-bottom: 14px; }
.cta .hero-actions { justify-content: center; }

/* ---------- doc / legal layout ---------- */
.doc { display: grid; grid-template-columns: 230px 1fr; gap: 48px; align-items: start; }
@media (max-width: 880px) { .doc { grid-template-columns: 1fr; } .doc-nav { display: none; } }
.doc-nav { position: sticky; top: 96px; display: grid; gap: 4px; }
.doc-nav a { font-size: 0.9rem; color: var(--muted); padding: 7px 12px; border-radius: 8px; border-left: 2px solid transparent; }
.doc-nav a:hover, .doc-nav a.active { color: var(--text); background: var(--surface); border-left-color: var(--accent-2); }
.doc-body h2 { font-size: 1.5rem; margin-top: 48px; padding-top: 8px; }
.doc-body h2:first-child { margin-top: 0; }
.doc-body p, .doc-body li { color: var(--muted); }
.doc-body ul { padding-left: 20px; }
.doc-body li { margin-bottom: 8px; }
.doc-meta { color: var(--faint); font-size: 0.88rem; margin-bottom: 32px; }

/* ---------- support / faq ---------- */
.faq { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; }
.faq + .faq { margin-top: 12px; }
.faq summary {
  list-style: none; cursor: pointer; padding: 20px 24px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  font-weight: 600; font-size: 1.02rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .plus { transition: transform 0.3s ease; color: var(--accent-2); font-size: 1.3rem; flex-shrink: 0; }
.faq[open] summary .plus { transform: rotate(45deg); }
.faq .ans { padding: 0 24px 22px; color: var(--muted); }

/* contact form */
.form { display: grid; gap: 16px; }
.field { display: grid; gap: 7px; }
.field label { font-size: 0.85rem; color: var(--muted); font-weight: 500; }
.field input, .field textarea, .field select {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 11px; padding: 13px 15px; color: var(--text);
  font-family: inherit; font-size: 0.95rem; transition: border-color 0.25s ease, background 0.25s ease;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--accent); background: var(--surface-2); }
.field textarea { resize: vertical; min-height: 130px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

/* ---------- page hero (interior) ---------- */
.page-hero { padding: 76px 0 24px; text-align: center; }
.page-hero .lead { margin-inline: auto; }

/* badges row */
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-pill { font-size: 0.8rem; padding: 6px 13px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--muted); }

/* research papers */
.paper {
  display: flex; gap: 18px; padding: 24px;
  border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface);
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.paper:hover { border-color: var(--border-strong); transform: translateY(-3px); }
.paper .badge { flex-shrink: 0; font-family: var(--mono); font-size: 0.72rem; color: var(--accent-2); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; height: fit-content; }
.paper h3 { font-size: 1.1rem; margin-bottom: 6px; }
.paper p { margin: 0; font-size: 0.92rem; }
.paper .authors { font-size: 0.82rem; color: var(--faint); margin-top: 8px; }

/* timeline */
.timeline { position: relative; display: grid; gap: 4px; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(var(--accent), var(--accent-2)); }
.tl-item { position: relative; padding: 14px 0 22px; }
.tl-item::before { content: ""; position: absolute; left: -23px; top: 20px; width: 11px; height: 11px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 0 4px rgba(21,224,200,0.15); }
.tl-item .yr { font-family: var(--mono); font-size: 0.82rem; color: var(--accent-2); }
.tl-item h3 { font-size: 1.08rem; margin: 4px 0 4px; }
.tl-item p { margin: 0; font-size: 0.93rem; }

/* team */
.member { text-align: center; }
.member .avatar {
  width: 96px; height: 96px; border-radius: 24px; margin: 0 auto 14px;
  background: var(--grad-soft); border: 1px solid var(--border);
  display: grid; place-items: center; font-size: 1.8rem; font-weight: 800;
  position: relative; overflow: hidden;
}
.member .avatar::after { content: ""; position: absolute; inset: 0; background: repeating-linear-gradient(120deg, rgba(5,6,10,0.4) 0 3px, transparent 3px 8px); opacity: 0.4; }
.member h3 { font-size: 1.05rem; margin-bottom: 2px; }
.member .role { color: var(--accent-2); font-size: 0.85rem; }

/* ---------- footer ---------- */
.footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 64px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer h4 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--faint); margin: 0 0 16px; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.footer a { color: var(--muted); font-size: 0.92rem; }
.footer a:hover { color: var(--text); }
.footer .about { color: var(--muted); font-size: 0.94rem; max-width: 34ch; margin: 16px 0 0; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 52px; padding-top: 26px; border-top: 1px solid var(--border); color: var(--faint); font-size: 0.86rem; }
.footer-bottom .socials { display: flex; gap: 12px; }
.footer-bottom .socials a { width: 34px; height: 34px; border-radius: 9px; background: var(--surface); border: 1px solid var(--border); display: grid; place-items: center; transition: background 0.25s ease, transform 0.25s ease; }
.footer-bottom .socials a:hover { background: var(--surface-2); transform: translateY(-2px); }

/* ---------- scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s cubic-bezier(0.2,0.7,0.2,1), transform 0.7s cubic-bezier(0.2,0.7,0.2,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: 0.08s; }
.reveal[data-d="2"] { transition-delay: 0.16s; }
.reveal[data-d="3"] { transition-delay: 0.24s; }
.reveal[data-d="4"] { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}

/* scrollbar */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--surface-2); border-radius: 99px; border: 3px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--border-strong); }