/* ═══════════════════════════════════════════════════════════════════════════
   Ṛta | Business Site Design System
   Premium enterprise look: deep-navy silicon surfaces, aurora gradients,
   glassmorphism, and a disciplined motion system (Level 1–3 motion).
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Tokens ─────────────────────────────────────────────────────────────── */
:root {
  /* surfaces */
  --bg-base:        #04060B;
  --bg-deep:        #020409;
  --surface-1:      #0A0F1A;
  --surface-2:      #0E1524;
  --surface-3:      #131C30;
  --glass:          rgba(10, 15, 26, 0.62);
  --glass-strong:   rgba(10, 15, 26, 0.82);
  --border:         rgba(148, 163, 184, 0.12);
  --border-strong:  rgba(148, 163, 184, 0.22);
  --border-glow:    rgba(56, 189, 248, 0.45);

  /* text */
  --text-primary:   #F4F8FF;
  --text-secondary: #B7C4DA;
  --text-muted:     #8A99B5;   /* ≥4.5:1 on surfaces */

  /* semantic */
  --accent:         #38BDF8;
  --accent-2:       #818CF8;
  --accent-3:       #22D3EE;
  --success:        #34D399;
  --warning:        #FBBF24;
  --error:          #F87171;
  --info:           #60A5FA;

  /* gradients */
  --grad-hero:      linear-gradient(115deg, #E8F4FF 0%, #7DD3FC 28%, #38BDF8 48%, #818CF8 78%, #C4B5FD 100%);
  --grad-cta:       linear-gradient(120deg, #38BDF8 0%, #818CF8 100%);
  --grad-card:      linear-gradient(160deg, rgba(56,189,248,0.09), rgba(129,140,248,0.05));

  /* typography */
  --font-display: "Space Grotesk", Inter, "Segoe UI", system-ui, sans-serif;
  --font-body:    Inter, "Segoe UI", system-ui, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;

  /* spacing / radius */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px; --sp-5: 24px;
  --sp-6: 32px; --sp-7: 48px; --sp-8: 64px; --sp-9: 96px; --sp-10: 140px;
  --radius-s: 8px; --radius-m: 14px; --radius-l: 22px; --radius-xl: 30px;
  --maxw: 1180px;

  /* motion */
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-inout: cubic-bezier(0.65, 0, 0.35, 1);
  --t-fast: 160ms; --t-med: 320ms; --t-slow: 700ms; --t-slower: 1100ms;
}

/* ── Reset / base ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color var(--t-fast) var(--ease-out); }
a:hover { color: #7DD3FC; }
::selection { background: rgba(56, 189, 248, 0.3); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ── Typography ─────────────────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0;
}
.display-hero {
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.04;
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-bottom: 0.12em;
}
.display-2 { font-size: clamp(1.8rem, 3.4vw, 2.7rem); letter-spacing: -0.025em; }
.display-3 { font-size: clamp(1.15rem, 2vw, 1.5rem); letter-spacing: -0.015em; }
.lede { font-size: 1.12rem; color: var(--text-secondary); max-width: 60ch; }
.brand-statement {
  margin-top: 18px;
  font-size: 1.24rem;
  line-height: 1.6;
  max-width: 52ch;
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: 0.005em;
}
.mono { font-family: var(--font-mono); font-size: 0.92em; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--accent); opacity: 0.6; }
.center .eyebrow::after { content: ""; width: 22px; height: 1px; background: var(--accent); opacity: 0.6; }

/* ── Layout ─────────────────────────────────────────────────────────────── */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--sp-5); }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 var(--sp-5); }
.section { padding: var(--sp-9) 0; position: relative; }
.section--tight { padding: var(--sp-7) 0; }
.section--alt { background: linear-gradient(180deg, var(--surface-1), var(--bg-base)); }
.section-head { max-width: 760px; margin-bottom: var(--sp-7); }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .lede { margin-top: 16px; }
.center { text-align: center; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-8); align-items: center; }
.split--flip > :first-child { order: 2; }
.split--flip > :last-child { order: 1; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-5); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-5); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); }
@media (max-width: 960px) {
  .split, .grid-2 { grid-template-columns: 1fr; gap: var(--sp-6); }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: var(--sp-7) 0; }
}

/* ── Ambient background: aurora + grid + noise ─────────────────────────── */
.aurora {
  position: fixed; inset: 0; z-index: -2; overflow: hidden;
  background: var(--bg-base);
}
.aurora::before {
  content: ""; position: absolute; inset: -20%;
  background:
    radial-gradient(42% 36% at 18% 12%, rgba(56,189,248,0.16) 0%, transparent 62%),
    radial-gradient(38% 34% at 82% 20%, rgba(129,140,248,0.14) 0%, transparent 60%),
    radial-gradient(46% 40% at 60% 88%, rgba(34,211,238,0.10) 0%, transparent 62%),
    radial-gradient(30% 26% at 8% 78%, rgba(129,140,248,0.10) 0%, transparent 58%);
  filter: blur(30px);
  animation: auroraDrift 26s var(--ease-inout) infinite alternate;
}
.aurora::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(148,163,184,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 78%);
}
@keyframes auroraDrift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(2%, -2%, 0) scale(1.06); }
  100% { transform: translate3d(-2%, 2%, 0) scale(1.02); }
}

/* ── Brand image (lockup logo in nav/footer, mark as app icon) ──────────── */
.brand-img {
  height: 40px; width: auto; max-width: 200px; object-fit: contain; flex: none;
  border-radius: 6px;
  transition: transform var(--t-med) var(--ease-out), filter var(--t-med) var(--ease-out);
}
.brand:hover .brand-img { transform: scale(1.04); filter: drop-shadow(0 0 12px rgba(56, 189, 248, 0.4)); }
.brand-img--lg { height: 48px; }

/* ── Glow typography (subtle, sliding sheen through the text) ───────────── */
.glow {
  position: relative;
  background: linear-gradient(120deg, #EAF4FF 0%, #BFE3FF 30%, #7DD3FC 50%, #A5B4FC 70%, #EAF4FF 100%);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: titleSheen 6s linear infinite;
  text-shadow: 0 0 14px rgba(56, 189, 248, 0.18);
}
@keyframes titleSheen {
  0% { background-position: 0% center; }
  100% { background-position: -220% center; }
}
.glow-strong {
  background: linear-gradient(120deg, #FFFFFF 0%, #9ADBFF 35%, #7DD3FC 50%, #A5B4FC 65%, #FFFFFF 100%);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: titleSheen 5s linear infinite;
  text-shadow: 0 0 20px rgba(56, 189, 248, 0.25);
}
.glow-pulse { animation: glowPulse 3.2s var(--ease-inout) infinite; }
@keyframes glowPulse {
  0%, 100% { text-shadow: 0 0 10px rgba(56, 189, 248, 0.18), 0 0 30px rgba(129, 140, 248, 0.10); }
  50% { text-shadow: 0 0 18px rgba(56, 189, 248, 0.35), 0 0 50px rgba(129, 140, 248, 0.22); }
}
/* shimmering gradient sweep over text */
.shimmer {
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shimmer 5s linear infinite;
}
@keyframes shimmer { to { background-position: -200% center; } }
.display-hero.glow-hero {
  filter: drop-shadow(0 0 16px rgba(56, 189, 248, 0.12)) drop-shadow(0 0 46px rgba(129, 140, 248, 0.08));
  animation: heroGlow 4.5s var(--ease-inout) infinite;
}
@keyframes heroGlow {
  0%, 100% { filter: drop-shadow(0 0 10px rgba(56, 189, 248, 0.08)) drop-shadow(0 0 30px rgba(129, 140, 248, 0.05)); }
  50% { filter: drop-shadow(0 0 20px rgba(56, 189, 248, 0.2)) drop-shadow(0 0 55px rgba(129, 140, 248, 0.14)); }
}

/* ── Nav (glass) ────────────────────────────────────────────────────────── */
.nav-wrap {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background var(--t-med) var(--ease-out), border-color var(--t-med) var(--ease-out),
              backdrop-filter var(--t-med) var(--ease-out), box-shadow var(--t-med) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav-wrap.scrolled {
  background: var(--glass-strong);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  backdrop-filter: blur(18px) saturate(1.4);
  border-bottom-color: var(--border);
  box-shadow: 0 10px 40px -18px rgba(0,0,0,0.7);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: var(--sp-5);
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text-primary); font-family: var(--font-display); font-weight: 700; font-size: 1.28rem; letter-spacing: -0.01em; }
.brand:hover { color: var(--text-primary); }
.brand svg { flex: none; }
.brand .brand-sub { display: block; font-family: var(--font-body); font-size: 0.62rem; font-weight: 500; letter-spacing: 0.22em; text-transform: uppercase; color: var(--text-muted); margin-top: 2px; }
.nav-links { display: flex; align-items: center; gap: var(--sp-4); }
.nav-links a:not(.btn) {
  color: var(--text-secondary); font-size: 0.92rem; font-weight: 500;
  padding: 6px 2px; position: relative;
}
.nav-links a:not(.btn)::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
  background: var(--grad-cta); border-radius: 2px;
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-med) var(--ease-out);
}
.nav-links a:not(.btn):hover { color: var(--text-primary); }
.nav-links a:not(.btn):hover::after { transform: scaleX(1); }
.nav-burger { display: none; background: none; border: 1px solid var(--border); color: var(--text-primary); font-size: 1.2rem; border-radius: var(--radius-s); width: 42px; height: 42px; cursor: pointer; }
@media (max-width: 860px) {
  .nav-burger { display: block; }
  .nav-links {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--glass-strong); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border); padding: var(--sp-3) var(--sp-5) var(--sp-5);
  }
  .nav-links.open { display: flex; animation: navDrop 260ms var(--ease-out); }
  .nav-links a { padding: 14px 0 !important; border-bottom: 1px solid var(--border); }
  .nav-links .btn { margin-top: 14px; }
}
@keyframes navDrop { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-display); font-weight: 600; font-size: 0.95rem;
  padding: 12px 22px; border-radius: var(--radius-m);
  border: 1px solid transparent; cursor: pointer;
  transition: transform var(--t-fast) var(--ease-out), box-shadow var(--t-fast) var(--ease-out),
              background var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out);
  white-space: nowrap;
}
.btn--primary {
  background: var(--grad-cta); color: #04121F;
  box-shadow: 0 8px 30px -10px rgba(56, 189, 248, 0.55);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 14px 44px -10px rgba(56, 189, 248, 0.75), 0 0 24px -6px rgba(56, 189, 248, 0.6); color: #04121F; }
.btn--primary { position: relative; overflow: hidden; }
.btn--primary::after {
  content: ""; position: absolute; top: 0; bottom: 0; width: 40%; left: -60%;
  background: linear-gradient(105deg, transparent, rgba(255,255,255,0.5), transparent);
  transform: skewX(-20deg); transition: left var(--t-slow) var(--ease-out);
}
.btn--primary:hover::after { left: 120%; }
.btn--outline { background: transparent; color: var(--text-primary); border-color: var(--border-strong); }
.btn--outline:hover { border-color: var(--border-glow); transform: translateY(-2px); box-shadow: 0 0 0 4px rgba(56,189,248,0.08); }
.btn--ghost { background: transparent; color: var(--text-secondary); border-color: transparent; }
.btn--ghost:hover { color: var(--text-primary); background: rgba(148,163,184,0.08); }
.btn--lg { padding: 15px 30px; font-size: 1.02rem; border-radius: var(--radius-l); }
.btn--sm { padding: 8px 16px; font-size: 0.85rem; border-radius: var(--radius-s); }

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero { padding: clamp(120px, 18vh, 190px) 0 var(--sp-8); position: relative; }
.hero-inner { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: var(--sp-8); align-items: center; }
@media (max-width: 960px) { .hero-inner { grid-template-columns: 1fr; gap: var(--sp-7); } }
.hero .lede { margin-top: 22px; font-size: 1.16rem; }
.hero-ctas { display: flex; gap: var(--sp-3); margin-top: var(--sp-6); flex-wrap: wrap; }
.hero-trust { display: flex; align-items: center; gap: var(--sp-3); margin-top: var(--sp-6); flex-wrap: wrap; }
.trust-line { font-size: 0.82rem; color: var(--text-muted); }

/* Terminal card */
.terminal {
  border-radius: var(--radius-l); border: 1px solid var(--border-strong);
  background: linear-gradient(180deg, rgba(19, 28, 48, 0.9), rgba(10, 15, 26, 0.95));
  box-shadow: 0 30px 80px -30px rgba(0,0,0,0.8), 0 0 0 1px rgba(56,189,248,0.06), 0 0 80px -30px rgba(56,189,248,0.3);
  overflow: hidden;
  animation: floatIn 900ms var(--ease-out) 120ms both;
}
.term-bar { display: flex; align-items: center; gap: 8px; padding: 13px 18px; border-bottom: 1px solid var(--border); background: rgba(4,6,11,0.5); }
.term-dot { width: 11px; height: 11px; border-radius: 50%; }
.term-dot:nth-child(1) { background: #F87171; } .term-dot:nth-child(2) { background: #FBBF24; } .term-dot:nth-child(3) { background: #34D399; }
.term-title { font-family: var(--font-mono); font-size: 0.74rem; color: var(--text-muted); margin-left: 8px; }
.term-body { padding: 22px 24px; font-family: var(--font-mono); font-size: 0.82rem; line-height: 2; min-height: 340px; }
.term-line { opacity: 0; animation: lineIn 400ms var(--ease-out) forwards; }
.term-line .t-cmd { color: #7DD3FC; }
.term-line .t-ok { color: var(--success); }
.term-line .t-warn { color: var(--warning); }
.term-line .t-err { color: var(--error); }
.term-line .t-dim { color: var(--text-muted); }
.term-line .t-acc { color: var(--accent-2); }
@keyframes lineIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@keyframes floatIn { from { opacity: 0; transform: translateY(24px) scale(0.985); } to { opacity: 1; transform: none; } }
.term-cursor::after { content: "▊"; color: var(--accent); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ── Badges / chips ─────────────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.02em;
  padding: 6px 13px; border-radius: 999px;
  border: 1px solid var(--border-strong); color: var(--text-secondary);
  background: rgba(148, 163, 184, 0.05);
}
.badge--accent { color: var(--accent); border-color: rgba(56,189,248,0.35); background: rgba(56,189,248,0.08); }
.badge--success { color: var(--success); border-color: rgba(52,211,153,0.35); background: rgba(52,211,153,0.08); }
.badge--info { color: var(--info); border-color: rgba(96,165,250,0.35); background: rgba(96,165,250,0.08); }
.badge--warning { color: var(--warning); border-color: rgba(251,191,36,0.35); background: rgba(251,191,36,0.08); }
.badge .sq { width: 7px; height: 7px; border-radius: 2px; background: currentColor; }
.chip-row { display: flex; gap: 10px; flex-wrap: wrap; }

/* ── Stats band ─────────────────────────────────────────────────────────── */
.stats-band {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4);
  border: 1px solid var(--border); border-radius: var(--radius-l);
  background: var(--glass); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  padding: var(--sp-6);
}
@media (max-width: 960px) { .stats-band { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .stats-band { grid-template-columns: 1fr 1fr; padding: var(--sp-5); } }
.stat-num {
  font-family: var(--font-display); font-weight: 700; font-size: clamp(2.2rem, 4vw, 3.2rem);
  letter-spacing: -0.03em; line-height: 1;
  background: var(--grad-hero); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-num .suffix { font-size: 0.5em; font-weight: 600; color: var(--text-muted); -webkit-text-fill-color: var(--text-muted); }
.stat:hover .stat-num { filter: drop-shadow(0 0 16px rgba(56, 189, 248, 0.4)); }
.stat { transition: transform var(--t-med) var(--ease-out); padding: var(--sp-3); border-radius: var(--radius-m); }
.stat:hover { transform: translateY(-3px); }
.stat-label { font-family: var(--font-display); font-weight: 600; font-size: 0.95rem; margin-top: 10px; }
.stat-note { font-size: 0.8rem; color: var(--text-muted); margin-top: 3px; }

/* ── Cards / tiles ──────────────────────────────────────────────────────── */
.card {
  position: relative;
  border: 1px solid var(--border); border-radius: var(--radius-l);
  background: linear-gradient(180deg, var(--surface-2), var(--surface-1));
  padding: var(--sp-6);
  transition: transform var(--t-med) var(--ease-out), border-color var(--t-med) var(--ease-out),
              box-shadow var(--t-med) var(--ease-out);
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56,189,248,0.5), transparent);
  opacity: 0; transition: opacity var(--t-med) var(--ease-out);
}
.card::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: linear-gradient(115deg, transparent 30%, rgba(56,189,248,0.10) 46%, rgba(129,140,248,0.10) 54%, transparent 70%);
  transform: translateX(-120%); transition: transform var(--t-slow) var(--ease-out);
}
.card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: 0 24px 60px -28px rgba(0,0,0,0.85), 0 0 34px -14px rgba(56,189,248,0.45); }
.card:hover::before { opacity: 1; }
.card:hover::after { transform: translateX(120%); }
.card-icon {
  width: 46px; height: 46px; border-radius: var(--radius-m);
  display: flex; align-items: center; justify-content: center;
  background: var(--grad-card); border: 1px solid var(--border-strong);
  color: var(--accent); margin-bottom: var(--sp-4);
  transition: transform var(--t-med) var(--ease-out), box-shadow var(--t-med) var(--ease-out);
}
.card:hover .card-icon { transform: scale(1.06); box-shadow: 0 0 26px -6px rgba(56,189,248,0.5); }
.card h3 { font-size: 1.12rem; margin-bottom: 10px; }
.card p { color: var(--text-secondary); font-size: 0.93rem; margin: 0 0 var(--sp-4); }
.card .card-meta { font-family: var(--font-mono); font-size: 0.74rem; color: var(--text-muted); }
.card .card-link { position: absolute; inset: 0; z-index: 2; } /* whole-card anchor */
.card .go { position: absolute; top: var(--sp-5); right: var(--sp-5); color: var(--text-muted); font-size: 1.1rem; transition: transform var(--t-fast) var(--ease-out), color var(--t-fast) var(--ease-out); z-index: 3; }
.card:hover .go { transform: translateX(4px); color: var(--accent); }

/* Feature-page hero tiles */
.f-hero-card {
  border: 1px solid var(--border); border-radius: var(--radius-l);
  background: linear-gradient(180deg, rgba(19,28,48,0.7), rgba(10,15,26,0.9));
  padding: var(--sp-6); display: grid; gap: 8px;
}
.f-hero-card .kv { display: grid; grid-template-columns: 1fr auto; align-items: baseline; gap: 4px 12px; }
.f-hero-card .k { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted); }
.f-hero-card .v { font-family: var(--font-mono); font-size: 0.9rem; color: var(--text-primary); text-align: right; }

/* ── Code blocks ────────────────────────────────────────────────────────── */
code.block {
  display: block; border-radius: var(--radius-m); overflow-x: auto;
  background: var(--bg-deep); border: 1px solid var(--border);
  padding: var(--sp-5); font-family: var(--font-mono); font-size: 0.83rem; line-height: 1.9;
  color: var(--text-secondary);
  white-space: pre-wrap;  /* keep multi-line blocks (ASCII diagrams, outputs) on their own lines */
  word-break: break-word;
}
code.block .c-cmd { color: #7DD3FC; }
code.block .c-dim { color: var(--text-muted); }
code.block .c-ok { color: var(--success); }
code.block .c-warn { color: var(--warning); }
code.block .c-err { color: var(--error); }
code.block .c-acc { color: var(--accent-2); }
.inline-code { font-family: var(--font-mono); font-size: 0.86em; background: rgba(148,163,184,0.1); border: 1px solid var(--border); border-radius: 5px; padding: 2px 7px; color: #BFDBFE; }

/* Install strip */
.install-strip {
  border-radius: var(--radius-l); overflow: hidden;
  border: 1px solid var(--border-strong);
  background: linear-gradient(180deg, rgba(19,28,48,0.85), rgba(10,15,26,0.92));
  box-shadow: 0 24px 70px -30px rgba(0,0,0,0.8);
}
.install-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; border-bottom: 1px solid var(--border); gap: var(--sp-3); flex-wrap: wrap; }
.install-head .label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-muted); }
.install-copy { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-muted); background: rgba(148,163,184,0.08); border: 1px solid var(--border); border-radius: 6px; padding: 4px 10px; cursor: pointer; transition: all var(--t-fast) var(--ease-out); }
.install-copy:hover { color: var(--accent); border-color: var(--border-glow); }
.install-copy.copied { color: var(--success); border-color: rgba(52,211,153,0.4); }
.install-body { padding: var(--sp-5) var(--sp-5) var(--sp-6); font-family: var(--font-mono); font-size: 0.86rem; line-height: 2.1; }
.install-body .p { color: var(--text-muted); }
.install-body .c { color: var(--text-primary); }

/* ── Panels / callouts / tables ─────────────────────────────────────────── */
.panel {
  border: 1px solid var(--border); border-radius: var(--radius-m);
  background: var(--surface-1); padding: var(--sp-5);
}
.callout {
  display: flex; gap: 14px; align-items: flex-start;
  border: 1px solid var(--border); border-radius: var(--radius-m);
  padding: var(--sp-4) var(--sp-5); background: var(--surface-1);
}
.callout .co-icon { flex: none; width: 24px; height: 24px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.8rem; margin-top: 2px; }
.callout--success .co-icon { background: rgba(52,211,153,0.14); color: var(--success); }
.callout--info .co-icon { background: rgba(96,165,250,0.14); color: var(--info); }
.callout--warning .co-icon { background: rgba(251,191,36,0.14); color: var(--warning); }
.callout--error .co-icon { background: rgba(248,113,113,0.14); color: var(--error); }
.callout--muted .co-icon { background: rgba(148,163,184,0.12); color: var(--text-muted); }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-m); background: var(--surface-1); }
table.spec { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
table.spec th { text-align: left; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted); padding: 14px 18px; border-bottom: 1px solid var(--border); }
table.spec td { padding: 13px 18px; border-bottom: 1px solid var(--border); color: var(--text-secondary); vertical-align: top; }
table.spec tr:last-child td { border-bottom: none; }
table.spec tr:hover td { background: rgba(56,189,248,0.03); }

/* ── Ticks list ─────────────────────────────────────────────────────────── */
.tick-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.tick-list li { display: flex; gap: 12px; align-items: flex-start; color: var(--text-secondary); font-size: 0.95rem; }
.tick-list .tick { flex: none; width: 20px; height: 20px; border-radius: 50%; background: rgba(52,211,153,0.13); color: var(--success); display: flex; align-items: center; justify-content: center; font-size: 0.72rem; margin-top: 3px; }

/* ── Steps / pipeline ───────────────────────────────────────────────────── */
.steps { display: grid; gap: var(--sp-4); counter-reset: step; }
.step {
  display: grid; grid-template-columns: 52px 1fr; gap: var(--sp-4); align-items: start;
  border: 1px solid var(--border); border-radius: var(--radius-m);
  padding: var(--sp-5); background: var(--surface-1);
  transition: border-color var(--t-med) var(--ease-out), transform var(--t-med) var(--ease-out);
}
.step:hover { border-color: var(--border-strong); transform: translateX(4px); }
.step-idx {
  width: 44px; height: 44px; border-radius: var(--radius-m);
  font-family: var(--font-display); font-weight: 700; font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  background: var(--grad-card); border: 1px solid var(--border-strong); color: var(--accent);
}
.step h4 { margin-bottom: 6px; font-size: 1rem; }
.step p { margin: 0; color: var(--text-secondary); font-size: 0.92rem; }

/* ── Logo marquee ───────────────────────────────────────────────────────── */
.marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, black 12%, black 88%, transparent); mask-image: linear-gradient(90deg, transparent, black 12%, black 88%, transparent); }
.marquee-track { display: flex; gap: var(--sp-8); width: max-content; animation: marquee 30s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item { display: flex; align-items: center; gap: 10px; color: var(--text-muted); font-family: var(--font-display); font-weight: 600; font-size: 0.95rem; white-space: nowrap; opacity: 0.85; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ── Reveal animations ──────────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 90ms; }
.reveal-delay-2 { transition-delay: 180ms; }
.reveal-delay-3 { transition-delay: 270ms; }
.reveal-scale { opacity: 0; transform: scale(0.96) translateY(16px); transition: opacity var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out); }
.reveal-scale.in { opacity: 1; transform: none; }
/* richer reveal variants */
.reveal-left { opacity: 0; transform: translateX(-34px); transition: opacity var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out); }
.reveal-left.in { opacity: 1; transform: none; }
.reveal-right { opacity: 0; transform: translateX(34px); transition: opacity var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out); }
.reveal-right.in { opacity: 1; transform: none; }
.reveal-zoom { opacity: 0; transform: scale(0.9); transition: opacity var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out); }
.reveal-zoom.in { opacity: 1; transform: none; }
.reveal-blur { opacity: 0; filter: blur(8px); transform: translateY(18px); transition: opacity var(--t-slow) var(--ease-out), filter var(--t-slow) var(--ease-out), transform var(--t-slow) var(--ease-out); }
.reveal-blur.in { opacity: 1; filter: none; transform: none; }
/* animated underline for headings */
.uline { position: relative; display: inline-block; }
.uline::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 3px; border-radius: 3px;
  background: var(--grad-cta); transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-slow) var(--ease-out);
}
.uline.in::after { transform: scaleX(1); }

/* page-load transitions */
.page-enter { animation: pageIn 640ms var(--ease-out) both; }
@keyframes pageIn { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* ── CTA band ───────────────────────────────────────────────────────────── */
.cta-band {
  position: relative; overflow: hidden;
  border-radius: var(--radius-xl); border: 1px solid var(--border-strong);
  background: linear-gradient(135deg, rgba(56,189,248,0.12), rgba(129,140,248,0.12)), var(--surface-1);
  padding: clamp(var(--sp-7), 8vw, var(--sp-10)) var(--sp-6);
  text-align: center;
}
.cta-band::before {
  content: ""; position: absolute; inset: -40% -20%;
  background: radial-gradient(40% 50% at 30% 20%, rgba(56,189,248,0.18), transparent 60%),
              radial-gradient(40% 50% at 75% 80%, rgba(129,140,248,0.16), transparent 60%);
  animation: ctaGlow 9s var(--ease-inout) infinite alternate;
}
@keyframes ctaGlow { from { opacity: 0.7; } to { opacity: 1; } }
.cta-band > * { position: relative; }

/* ── Footer ─────────────────────────────────────────────────────────────── */
.footer { border-top: 1px solid var(--border); background: var(--bg-deep); padding: var(--sp-8) 0 var(--sp-6); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: var(--sp-6); }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.footer h4 { font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 14px; font-family: var(--font-mono); font-weight: 600; }
.footer-grid a { display: block; color: var(--text-secondary); font-size: 0.9rem; padding: 4px 0; }
.footer-grid a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; gap: var(--sp-3); flex-wrap: wrap; margin-top: var(--sp-7); padding-top: var(--sp-5); border-top: 1px solid var(--border); font-size: 0.8rem; color: var(--text-muted); }

/* ── Reduced motion ─────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  .reveal, .reveal-scale { opacity: 1; transform: none; }
  .term-line { opacity: 1; }
  html { scroll-behavior: auto; }
}


/* ---- Audio overview player ---- */
.player-shell {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--sp-6) var(--sp-6) var(--sp-5);
  border-radius: var(--radius-l);
  background: linear-gradient(160deg, rgba(56,189,248,0.07), rgba(129,140,248,0.05));
  border: 1px solid var(--border-strong);
  box-shadow: 0 20px 60px rgba(2, 4, 9, 0.55);
}

.lang-switch {
  display: inline-flex;
  gap: 4px;
  margin-bottom: var(--sp-5);
  padding: 4px;
  border-radius: 999px;
  background: var(--surface-1);
  border: 1px solid var(--border);
}

.lang-btn {
  appearance: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  padding: 8px 22px;
  border-radius: 999px;
  transition: color var(--t-fast) var(--ease-out), background var(--t-fast) var(--ease-out), box-shadow var(--t-fast) var(--ease-out);
}
.lang-btn:hover { color: var(--text-primary); }
.lang-btn.is-active {
  color: #04121E;
  background: linear-gradient(120deg, #38BDF8, #818CF8);
  box-shadow: 0 4px 18px rgba(56,189,248,0.35);
}

.player-title {
  margin: 0 0 var(--sp-4);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
}

#audio-viz {
  flex: 1;
  min-width: 0;
  height: 64px;
  border-radius: var(--radius-s);
  touch-action: none;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.play-btn {
  flex: none;
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  cursor: pointer;
  border-radius: 50%;
  color: #04121E;
  background: linear-gradient(120deg, #38BDF8, #818CF8);
  border: none;
  box-shadow: 0 6px 24px rgba(56,189,248,0.35);
  transition: transform var(--t-fast) var(--ease-out), box-shadow var(--t-fast) var(--ease-out);
}
.play-btn:hover { transform: scale(1.06); }
.play-btn:active { transform: scale(0.97); }
.play-btn.is-playing { animation: playPulse 1.8s var(--ease-inout) infinite; }

@keyframes playPulse {
  0%, 100% { box-shadow: 0 6px 24px rgba(56,189,248,0.30); }
  50%      { box-shadow: 0 6px 34px rgba(129,140,248,0.55); }
}

.player-time {
  flex: none;
  min-width: 44px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 560px) {
  .player-shell { padding: var(--sp-4); }
  .player-controls { gap: var(--sp-2); }
  #audio-viz { height: 48px; }
}