/* =================================================================
   TWIXBOT — Design System
   Dark robotics aesthetic · bilingual (VI/EN) · responsive
   ================================================================= */

/* ---------- Tokens ---------- */
:root {
  /* Ink / surfaces */
  --ink-900: #070A11;
  --ink-850: #0A0E18;
  --ink-800: #0D121E;
  --ink-700: #121829;
  --ink-650: #161D31;
  --ink-600: #1B2236;

  /* Lines */
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);
  --line-glow: rgba(61, 123, 255, 0.35);

  /* Text */
  --text: #EAEFF7;
  --text-dim: #A2AFC6;
  --text-mute: #67748C;

  /* Brand + product accents */
  --brand: #3D7BFF;
  --brand-2: #6FA0FF;
  --brand-ink: #0B1530;
  --aqua: #22D3EE;     /* DeltaSea Mini */
  --amber: #F8A93B;    /* WallBot AAC   */
  --violet: #9B7BFF;   /* AeroPrint     */

  /* Accent is overridden per product (see body.product--*); defaults to brand */
  --accent: var(--brand);
  --accent-2: var(--brand-2);
  --accent-soft: rgba(61, 123, 255, 0.14);
  --accent-glow: rgba(61, 123, 255, 0.45);

  /* Status */
  --good: #34D399;

  /* Geometry */
  --r-sm: 10px;
  --r: 16px;
  --r-lg: 22px;
  --r-xl: 30px;
  --maxw: 1200px;
  --gutter: clamp(20px, 5vw, 56px);

  /* Type */
  --font-display: "Space Grotesk", "Be Vietnam Pro", system-ui, sans-serif;
  --font-body: "Inter", "Be Vietnam Pro", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.85);
  --shadow-glow: 0 30px 80px -40px var(--accent-glow);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: 92px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  font-family: var(--font-body);
  background: var(--ink-900);
  color: var(--text);
  line-height: 1.65;
  font-size: 16px;
  letter-spacing: 0.1px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; color: inherit; background: none; border: none; }
ul { list-style: none; padding: 0; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; border-radius: 4px; }
::selection { background: var(--accent); color: #fff; }

/* ---------- Per-product accent themes (whole page) ---------- */
body.product--deltasea {
  --accent: var(--aqua); --accent-2: #67E8F9;
  --accent-soft: rgba(34, 211, 238, 0.13); --accent-glow: rgba(34, 211, 238, 0.42);
  --line-glow: rgba(34, 211, 238, 0.35);
}
body.product--wallbot {
  --accent: var(--amber); --accent-2: #FBC56B;
  --accent-soft: rgba(248, 169, 59, 0.13); --accent-glow: rgba(248, 169, 59, 0.42);
  --line-glow: rgba(248, 169, 59, 0.35);
}
body.product--aeroprint {
  --accent: var(--violet); --accent-2: #C0AAFF;
  --accent-soft: rgba(155, 123, 255, 0.14); --accent-glow: rgba(155, 123, 255, 0.45);
  --line-glow: rgba(155, 123, 255, 0.4);
}

/* ---------- Bilingual toggle ---------- */
html[data-lang="vi"] .lang-en { display: none !important; }
html[data-lang="en"] .lang-vi { display: none !important; }

/* ---------- Layout helpers ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(64px, 9vw, 128px); position: relative; }
.section--tight { padding-block: clamp(48px, 6vw, 80px); }
.center { text-align: center; }
.stack > * + * { margin-top: 1rem; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.08; letter-spacing: -0.02em; }
.h-display { font-size: clamp(2.4rem, 6vw, 4.4rem); font-weight: 700; line-height: 1.02; }
.h1 { font-size: clamp(2rem, 4.6vw, 3.3rem); }
.h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
.h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); }
.lead { font-size: clamp(1.05rem, 1.5vw, 1.3rem); color: var(--text-dim); line-height: 1.6; }
.muted { color: var(--text-dim); }
.dim { color: var(--text-mute); }
.balance { text-wrap: balance; }
strong, b { color: #fff; font-weight: 600; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 0.55em;
  font-family: var(--font-mono);
  font-size: 0.74rem; font-weight: 600;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent-2);
}
.eyebrow::before {
  content: ""; width: 22px; height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.eyebrow--center { justify-content: center; }
.gradient-text {
  background: linear-gradient(100deg, #fff 10%, var(--accent-2) 55%, var(--accent) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

.section-head { max-width: 720px; }
.section-head.center { margin-inline: auto; }
.section-head .h2 { margin-top: 0.7rem; }
.section-head .lead { margin-top: 1rem; }

/* ---------- Buttons ---------- */
.btn {
  --b: var(--accent);
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6em;
  padding: 0.85em 1.5em; border-radius: 999px;
  font-weight: 600; font-size: 0.97rem; letter-spacing: 0.01em;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s, border-color 0.25s, color 0.25s;
  white-space: nowrap; will-change: transform;
}
.btn svg { width: 1.1em; height: 1.1em; }
.btn--primary {
  color: #fff;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  box-shadow: 0 14px 36px -16px var(--accent-glow);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 20px 44px -16px var(--accent-glow); }
.btn--ghost {
  color: var(--text); border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.02);
}
.btn--ghost:hover { border-color: var(--accent); color: #fff; transform: translateY(-2px); background: var(--accent-soft); }
.btn--lg { padding: 1em 1.8em; font-size: 1.02rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.85rem; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 0.4em;
  font-weight: 600; color: var(--accent-2);
  transition: gap 0.25s var(--ease), color 0.2s;
}
.link-arrow svg { width: 1.05em; height: 1.05em; transition: transform 0.25s var(--ease); }
.link-arrow:hover { color: #fff; gap: 0.65em; }
.link-arrow:hover svg { transform: translateX(3px); }

/* ---------- Pills / tags / chips ---------- */
.pill {
  display: inline-flex; align-items: center; gap: 0.5em;
  padding: 0.4em 0.9em; border-radius: 999px;
  font-size: 0.8rem; font-weight: 600;
  border: 1px solid var(--line-2); color: var(--text-dim);
  background: rgba(255, 255, 255, 0.025);
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.pill--accent { color: var(--accent-2); border-color: var(--line-glow); background: var(--accent-soft); }
.tag {
  display: inline-flex; font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 0.35em 0.7em; border-radius: 7px;
  border: 1px solid var(--line); color: var(--text-dim);
  background: rgba(255, 255, 255, 0.02);
}
.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; }

/* ---------- Cards ---------- */
.card {
  position: relative; background: var(--ink-700);
  border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: clamp(1.4rem, 3vw, 2rem);
  transition: transform 0.35s var(--ease), border-color 0.35s, background 0.35s;
}
.card:hover { border-color: var(--line-2); }
.card--soft { background: var(--ink-800); }

.icon-badge {
  display: grid; place-items: center;
  width: 48px; height: 48px; border-radius: 13px;
  background: var(--accent-soft); border: 1px solid var(--line-glow);
  color: var(--accent-2); flex: none;
}
.icon-badge svg { width: 24px; height: 24px; }
.icon-badge--lg { width: 60px; height: 60px; border-radius: 16px; }
.icon-badge--lg svg { width: 30px; height: 30px; }

/* ---------- Grids ---------- */
.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.6rem); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.two-col {
  display: grid; gap: clamp(2rem, 5vw, 4.5rem);
  grid-template-columns: 1.05fr 0.95fr; align-items: center;
}
.two-col--text-right { grid-template-columns: 0.95fr 1.05fr; }

@media (max-width: 940px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .two-col, .two-col--text-right { grid-template-columns: 1fr; gap: 2.4rem; }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* =================================================================
   Header / Nav
   ================================================================= */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(7, 10, 17, 0.82);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; font-family: var(--font-display); font-weight: 700; font-size: 1.18rem; letter-spacing: -0.01em; color: #fff; }
.brand .logo { width: 32px; height: 32px; }
.brand b { color: var(--brand-2); font-weight: 700; }

.nav-links { display: flex; align-items: center; gap: 0.35rem; }
.nav-links a {
  padding: 0.5rem 0.85rem; border-radius: 9px;
  font-size: 0.93rem; font-weight: 500; color: var(--text-dim);
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: #fff; background: rgba(255, 255, 255, 0.05); }

.nav-actions { display: flex; align-items: center; gap: 0.7rem; }
.lang-toggle {
  display: inline-flex; align-items: center;
  border: 1px solid var(--line-2); border-radius: 999px;
  font-family: var(--font-mono); font-size: 0.74rem; font-weight: 600;
  overflow: hidden;
}
.lang-toggle span {
  padding: 0.4em 0.7em; color: var(--text-mute); transition: color 0.2s, background 0.2s;
}
html[data-lang="vi"] .lang-toggle .lt-vi,
html[data-lang="en"] .lang-toggle .lt-en {
  color: #fff; background: var(--accent);
}

.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 11px; border: 1px solid var(--line-2); }
.nav-toggle span { display: block; width: 18px; height: 2px; margin: 3px auto; background: var(--text); border-radius: 2px; transition: transform 0.3s var(--ease), opacity 0.2s; }
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 920px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; inset: 72px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0.2rem;
    padding: 1rem var(--gutter) 1.6rem;
    background: rgba(8, 11, 19, 0.97);
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform 0.3s var(--ease), opacity 0.3s;
  }
  .nav-open .nav-links { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 0.8rem 0.9rem; font-size: 1rem; }
}

/* =================================================================
   Backgrounds / FX
   ================================================================= */
.bg-grid::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  opacity: 0.6;
}
.glow {
  position: absolute; border-radius: 50%; filter: blur(90px);
  pointer-events: none; z-index: 0; opacity: 0.5;
}
.section, .hero { position: relative; }
.section > .wrap, .hero > .wrap { position: relative; z-index: 1; }

/* =================================================================
   Hero
   ================================================================= */
.hero {
  padding-top: clamp(120px, 18vh, 180px);
  padding-bottom: clamp(60px, 9vw, 110px);
  overflow: hidden;
}
.hero .glow-1 { width: 620px; height: 620px; top: -240px; left: 50%; transform: translateX(-55%); background: radial-gradient(circle, var(--accent), transparent 65%); opacity: 0.4; }
.hero .glow-2 { width: 420px; height: 420px; bottom: -180px; right: -80px; background: radial-gradient(circle, var(--violet), transparent 70%); opacity: 0.22; }

.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero h1 { margin-top: 1.1rem; }
.hero .lead { margin-top: 1.4rem; max-width: 36ch; }
.hero .btn-row { margin-top: 2rem; }
.hero-meta { margin-top: 2.4rem; display: flex; flex-wrap: wrap; gap: 1.8rem; }
.hero-meta .stat .n { font-family: var(--font-display); font-size: 1.7rem; font-weight: 700; color: #fff; }
.hero-meta .stat .l { font-size: 0.82rem; color: var(--text-mute); }

@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.6rem; }
  .hero .lead { max-width: 52ch; }
}

/* Hero visual (robotic node graphic) */
.hero-visual { position: relative; aspect-ratio: 1 / 1; max-width: 480px; margin-inline: auto; width: 100%; }
.hero-visual .ring { position: absolute; inset: 0; border: 1px solid var(--line-2); border-radius: 50%; }
.hero-visual .ring.r2 { inset: 12%; border-color: var(--line); }
.hero-visual .ring.r3 { inset: 26%; border-style: dashed; border-color: var(--line); }
.hero-orbit { position: absolute; inset: 0; animation: spin 26s linear infinite; }
.hero-orbit.rev { animation-direction: reverse; animation-duration: 34s; }
@keyframes spin { to { transform: rotate(360deg); } }
.orbit-node {
  position: absolute; top: 0; left: 50%; transform: translate(-50%, -50%);
  width: 56px; height: 56px; border-radius: 15px;
  display: grid; place-items: center;
  background: var(--ink-700); border: 1px solid var(--line-2);
  color: var(--accent-2); box-shadow: var(--shadow);
}
.orbit-node svg { width: 26px; height: 26px; }
.orbit-node.n-aqua { color: var(--aqua); }
.orbit-node.n-amber { color: var(--amber); }
.orbit-node.n-violet { color: var(--violet); }
.hero-core {
  position: absolute; inset: 0; margin: auto; width: 38%; height: 38%;
  display: grid; place-items: center; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--ink-650), var(--ink-850));
  border: 1px solid var(--line-2); box-shadow: inset 0 0 40px rgba(0,0,0,.6), var(--shadow-glow);
}
.hero-core .logo { width: 46%; height: 46%; animation: pulse 3.6s var(--ease) infinite; }
@keyframes pulse { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.06); opacity: 0.85; } }

/* =================================================================
   Stat callouts
   ================================================================= */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(1rem, 2vw, 1.4rem); }
.stat-card { background: var(--ink-800); border: 1px solid var(--line); border-radius: var(--r); padding: 1.5rem 1.4rem; }
.stat-card .n { font-family: var(--font-display); font-size: clamp(1.8rem, 3.2vw, 2.7rem); font-weight: 700; color: #fff; line-height: 1; }
.stat-card .n .unit { color: var(--accent-2); }
.stat-card .l { margin-top: 0.6rem; font-size: 0.88rem; color: var(--text-dim); }
.stat-card .src { margin-top: 0.3rem; font-size: 0.74rem; color: var(--text-mute); }
@media (max-width: 760px) { .stats-row { grid-template-columns: repeat(2, 1fr); } }

/* =================================================================
   Product showcase cards (home)
   ================================================================= */
.product-card {
  --accent: var(--brand); --accent-2: var(--brand-2);
  display: flex; flex-direction: column; overflow: hidden;
  background: linear-gradient(180deg, var(--ink-700), var(--ink-800));
  border: 1px solid var(--line); border-radius: var(--r-lg);
  transition: transform 0.4s var(--ease), border-color 0.4s, box-shadow 0.4s;
}
.product-card:hover { transform: translateY(-6px); border-color: var(--line-glow); box-shadow: var(--shadow-glow); }
.product-card.p-aqua { --accent: var(--aqua); --accent-2: #67E8F9; --accent-soft: rgba(34, 211, 238, .13); --accent-glow: rgba(34,211,238,.4); --line-glow: rgba(34,211,238,.35); }
.product-card.p-amber { --accent: var(--amber); --accent-2: #FBC56B; --accent-soft: rgba(248, 169, 59, .13); --accent-glow: rgba(248,169,59,.4); --line-glow: rgba(248,169,59,.35); }
.product-card.p-violet { --accent: var(--violet); --accent-2: #C0AAFF; --accent-soft: rgba(155, 123, 255, .14); --accent-glow: rgba(155,123,255,.45); --line-glow: rgba(155,123,255,.4); }

.product-card .pc-visual {
  position: relative; aspect-ratio: 16 / 10; display: grid; place-items: center;
  background:
    radial-gradient(120% 120% at 50% 0%, var(--accent-soft), transparent 60%),
    var(--ink-850);
  border-bottom: 1px solid var(--line); overflow: hidden;
}
.product-card .pc-visual::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 30px 30px; opacity: 0.5;
  -webkit-mask-image: radial-gradient(circle at 50% 40%, #000, transparent 75%);
  mask-image: radial-gradient(circle at 50% 40%, #000, transparent 75%);
}
.product-card .pc-art { position: relative; z-index: 1; width: 46%; color: var(--accent-2); filter: drop-shadow(0 12px 30px var(--accent-glow)); transition: transform 0.5s var(--ease); }
.product-card:hover .pc-art { transform: translateY(-4px) scale(1.04); }
.product-card .pc-num { position: absolute; top: 1rem; left: 1.1rem; z-index: 1; font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-mute); }
.product-card .pc-cat { position: absolute; top: 1rem; right: 1.1rem; z-index: 1; }

.product-card .pc-body { padding: clamp(1.4rem, 3vw, 1.9rem); display: flex; flex-direction: column; flex: 1; }
.product-card .pc-name { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: #fff; }
.product-card .pc-tag { color: var(--accent-2); font-weight: 600; font-size: 0.92rem; margin-top: 0.15rem; }
.product-card .pc-desc { margin-top: 0.8rem; color: var(--text-dim); font-size: 0.96rem; }
.product-card .pc-specs { margin-top: 1.1rem; display: flex; flex-wrap: wrap; gap: 0.45rem; }
.product-card .pc-foot { margin-top: auto; padding-top: 1.3rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.product-card .pc-price { font-family: var(--font-mono); font-size: 0.9rem; color: var(--text); }
.product-card .pc-price b { color: #fff; }

/* =================================================================
   Feature rows / icon cards
   ================================================================= */
.feature {
  display: flex; gap: 1.1rem; align-items: flex-start;
}
.feature .f-body h3 { font-size: 1.12rem; }
.feature .f-body p { margin-top: 0.4rem; color: var(--text-dim); font-size: 0.95rem; }

.numbered { counter-reset: step; }
.num-card { position: relative; }
.num-card .num { font-family: var(--font-mono); font-size: 0.85rem; font-weight: 700; color: var(--accent-2); letter-spacing: 0.1em; }
.num-card h3 { margin-top: 0.6rem; font-size: 1.1rem; }
.num-card p { margin-top: 0.5rem; color: var(--text-dim); font-size: 0.93rem; }

/* =================================================================
   Spec list / data table
   ================================================================= */
.spec-list { display: grid; gap: 0; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.spec-list .row { display: grid; grid-template-columns: 1fr 1.3fr; gap: 1rem; padding: 0.95rem 1.2rem; border-bottom: 1px solid var(--line); }
.spec-list .row:last-child { border-bottom: none; }
.spec-list .row:nth-child(odd) { background: rgba(255, 255, 255, 0.015); }
.spec-list .k { color: var(--text-mute); font-size: 0.9rem; }
.spec-list .v { color: var(--text); font-weight: 500; }

.data-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.data-table th, .data-table td { text-align: left; padding: 0.85rem 1rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.data-table thead th { font-family: var(--font-mono); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-mute); }
.data-table tbody tr:hover { background: rgba(255, 255, 255, 0.02); }
.data-table td:first-child { color: #fff; font-weight: 500; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); }
.table-scroll .data-table th, .table-scroll .data-table td { white-space: nowrap; }

/* =================================================================
   Timeline / roadmap
   ================================================================= */
.timeline { display: grid; gap: clamp(1rem, 2vw, 1.4rem); grid-template-columns: repeat(4, 1fr); }
.tl-step { position: relative; background: var(--ink-800); border: 1px solid var(--line); border-radius: var(--r); padding: 1.4rem; }
.tl-step .ph { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-2); font-weight: 600; }
.tl-step .dot { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); margin: 0.8rem 0; }
.tl-step h3 { font-size: 1.05rem; }
.tl-step p { margin-top: 0.45rem; color: var(--text-dim); font-size: 0.9rem; }
@media (max-width: 920px) { .timeline { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .timeline { grid-template-columns: 1fr; } }

/* =================================================================
   Process / flow
   ================================================================= */
.flow { display: flex; flex-wrap: wrap; gap: 0.8rem; align-items: stretch; }
.flow-step {
  flex: 1 1 150px; position: relative;
  background: var(--ink-800); border: 1px solid var(--line);
  border-radius: var(--r); padding: 1.2rem 1.2rem;
}
.flow-step .n { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: var(--accent-soft); color: var(--accent-2); font-family: var(--font-mono); font-weight: 700; border: 1px solid var(--line-glow); }
.flow-step h4 { margin-top: 0.8rem; font-size: 1rem; }
.flow-step p { margin-top: 0.3rem; font-size: 0.85rem; color: var(--text-dim); }

/* =================================================================
   Split feature (image side)
   ================================================================= */
.media-frame {
  position: relative; border-radius: var(--r-lg); overflow: hidden;
  border: 1px solid var(--line-2);
  background: radial-gradient(120% 120% at 30% 0%, var(--accent-soft), var(--ink-800));
  aspect-ratio: 4 / 3; display: grid; place-items: center;
}
.media-frame::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 34px 34px; opacity: 0.5;
}
.media-frame .art { position: relative; z-index: 1; width: 56%; color: var(--accent-2); filter: drop-shadow(0 16px 40px var(--accent-glow)); }

/* =================================================================
   Callout / quote / CTA band
   ================================================================= */
.callout {
  border: 1px solid var(--line-glow); border-radius: var(--r-lg);
  background: linear-gradient(120deg, var(--accent-soft), transparent 70%), var(--ink-800);
  padding: clamp(1.4rem, 3vw, 2.2rem);
}
.cta-band {
  position: relative; overflow: hidden;
  border-radius: var(--r-xl);
  border: 1px solid var(--line-2);
  background: radial-gradient(120% 160% at 0% 0%, var(--accent-soft), transparent 55%), linear-gradient(180deg, var(--ink-700), var(--ink-850));
  padding: clamp(2.2rem, 5vw, 4rem);
  text-align: center;
}
.cta-band .glow { width: 420px; height: 420px; top: -200px; left: 50%; transform: translateX(-50%); background: radial-gradient(circle, var(--accent), transparent 65%); opacity: 0.25; }
.cta-band .h2 { margin-bottom: 1rem; }
.cta-band .btn-row { justify-content: center; margin-top: 1.8rem; }

/* =================================================================
   Page hero (product/inner pages)
   ================================================================= */
.page-hero { padding-top: clamp(120px, 16vh, 168px); padding-bottom: clamp(48px, 7vw, 90px); overflow: hidden; }
.page-hero .glow-1 { width: 560px; height: 560px; top: -220px; right: -120px; background: radial-gradient(circle, var(--accent), transparent 65%); opacity: 0.32; }
.breadcrumb { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; color: var(--text-mute); margin-bottom: 1.4rem; }
.breadcrumb a:hover { color: var(--text); }
.breadcrumb .sep { opacity: 0.5; }

/* =================================================================
   Footer
   ================================================================= */
.site-footer { border-top: 1px solid var(--line); background: var(--ink-850); padding-block: clamp(3rem, 6vw, 5rem) 2rem; position: relative; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2.5rem; }
.footer-brand .lead { font-size: 0.95rem; margin-top: 1rem; max-width: 34ch; }
.footer-col h4 { font-family: var(--font-mono); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-mute); margin-bottom: 1rem; }
.footer-col a { display: block; padding: 0.32rem 0; color: var(--text-dim); font-size: 0.93rem; transition: color 0.2s; }
.footer-col a:hover { color: #fff; }
.footer-bottom { margin-top: 3rem; padding-top: 1.6rem; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; color: var(--text-mute); font-size: 0.85rem; }
.social-row { display: flex; gap: 0.6rem; }
.social-row a { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--line-2); color: var(--text-dim); transition: color 0.2s, border-color 0.2s, transform 0.2s; }
.social-row a:hover { color: #fff; border-color: var(--accent); transform: translateY(-2px); }
.social-row a svg { width: 18px; height: 18px; }
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; } .footer-brand { grid-column: 1 / -1; } }

/* =================================================================
   Contact
   ================================================================= */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.contact-item { display: flex; gap: 1rem; align-items: flex-start; padding: 1.1rem 0; border-bottom: 1px solid var(--line); }
.contact-item:last-child { border-bottom: none; }
.contact-item .ci-k { font-size: 0.82rem; color: var(--text-mute); }
.contact-item .ci-v { color: #fff; font-weight: 500; margin-top: 0.15rem; }
.form-field { margin-bottom: 1rem; }
.form-field label { display: block; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 0.45rem; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 0.8rem 1rem; border-radius: var(--r-sm);
  background: var(--ink-800); border: 1px solid var(--line-2); color: var(--text);
  font: inherit; transition: border-color 0.2s, background 0.2s;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus { outline: none; border-color: var(--accent); background: var(--ink-700); }
.form-field textarea { resize: vertical; min-height: 120px; }
@media (max-width: 820px) { .contact-grid { grid-template-columns: 1fr; } }

/* =================================================================
   Scroll reveal
   ================================================================= */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in-view { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }

/* ---------- Utilities ---------- */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }
.mb-0 { margin-bottom: 0; }
.maxw-prose { max-width: 62ch; }
.hide-mobile { }
@media (max-width: 920px) { .hide-mobile { display: none !important; } }