AkurAI-Platform / frontend/styles.css

Latest change 7c2481f3029b7b2f8b01818af3d8e5fa55a3ea0b - OLI-105: versioned immutable three.js path, skip link, focus-visible, responsive grid by Dev Lead

/* AkurAI Platform — SaaS suite front door. Hand-written, no build step.
   Every colour comes from the AkurAI-Framework semantic tokens
   (--bg --panel --fg --accent … defined per theme in /themes.css), so the
   page re-themes across all 17 themes. Tints are derived with color-mix —
   no theme colour is hardcoded. The single exception is on-accent label text
   (#fff), the standard pairing the framework's own site uses on accent fills. */

:root {
  --radius: 16px;
  --radius-sm: 12px;
  --shell: 1180px;
  --on-accent: #fff; /* label text on saturated accent fills only */
}

* { box-sizing: border-box; }
html, body { margin: 0; }
html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  color: var(--fg);
  background:
    radial-gradient(1100px 560px at 78% -8%, color-mix(in srgb, var(--accent) 12%, transparent), transparent),
    radial-gradient(820px 460px at 2% 4%, color-mix(in srgb, var(--accent-2) 10%, transparent), transparent),
    var(--bg);
  font: 16px/1.6 Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.shell { width: min(var(--shell), 100% - 48px); margin-inline: auto; }
.section { padding-block: 88px; }

/* ---------- Header ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 62px;
  padding: 10px clamp(18px, 4vw, 34px);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--fg);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(150deg, var(--accent), var(--accent-2));
  color: var(--on-accent, #fff);
  font-size: 15px;
  font-weight: 800;
}
.brand-mark svg { width: 18px; height: 18px; display: block; }

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
}
.nav-links a { color: var(--muted); font-size: 14px; font-weight: 600; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.nav-links .nav-signin {
  min-height: 40px;
  padding: 7px 16px;
  border-radius: 10px;
  color: var(--on-accent);
  font-size: 13px;
}

/* ---------- Shared type ---------- */
.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.grad {
  color: var(--accent);
}

.lede { color: var(--muted); font-size: clamp(17px, 2.2vw, 20px); line-height: 1.55; }

.section-head { max-width: 680px; margin-bottom: 40px; }
.section-head h2,
.cta h2,
.sources-section h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.025em;
}
.section-head p { margin: 14px 0 0; color: var(--muted); font-size: 17px; }

/* ---------- Buttons ---------- */
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn-row.center { justify-content: center; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 11px;
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  transition: transform .12s ease, filter .15s ease, background-color .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: linear-gradient(150deg, var(--accent), color-mix(in srgb, var(--accent) 65%, var(--accent-2)));
  color: var(--on-accent);
  box-shadow: 0 14px 30px -16px color-mix(in srgb, var(--accent) 80%, transparent);
}
.btn-primary:hover { filter: brightness(1.06); }

.btn-secondary {
  background: color-mix(in srgb, var(--fg) 6%, transparent);
  color: var(--fg);
  border-color: var(--border-2);
}
.btn-secondary:hover { background: color-mix(in srgb, var(--fg) 11%, transparent); }

.btn-tertiary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
}
.btn-tertiary:hover {
  background: color-mix(in srgb, var(--fg) 8%, transparent);
  text-decoration: none;
}

/* ---------- Health pill ---------- */
.health-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: 26px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel) 70%, transparent);
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}
.health-pill::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 0 0 4px color-mix(in srgb, currentColor 22%, transparent);
}
.health-pill[data-state="ok"] { color: var(--ok); }
.health-pill[data-state="fail"] { color: var(--danger); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(64px, 9vw, 104px) clamp(56px, 8vw, 92px);
  border-bottom: 1px solid var(--border);
}
.hero-glow {
  position: absolute;
  inset: -40% 30% auto -10%;
  height: 70%;
  background: radial-gradient(60% 60% at 50% 50%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%);
  filter: blur(10px);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .85fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.hero-copy h1 {
  margin: 0 0 16px;
  max-width: 16ch;
  font-size: clamp(40px, 6.4vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.035em;
}
.hero-copy { align-self: center; }
.hero-copy .lede { max-width: 48ch; color: color-mix(in srgb, var(--fg) 72%, var(--muted)); }
.hero-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; margin-top: 18px; }
.hero-meta .health-pill { margin: 0; padding: 0; border: 0; background: transparent; }
.hero-link {
  min-height: 44px;
  padding: 0;
  border: 0;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
}
.hero-link:hover { color: var(--fg); text-decoration: underline; }

/* Spatial glass system — generated art plus live WebGL core */
.spatial-stage {
  --pointer-x: 0;
  --pointer-y: 0;
  --scroll-progress: 0;
  position: relative;
  min-height: clamp(480px, 48vw, 650px);
  isolation: isolate;
  border: 1px solid color-mix(in srgb, var(--fg) 15%, transparent);
  border-radius: clamp(28px, 4vw, 48px);
  overflow: hidden;
  background: #080a10;
  box-shadow:
    0 60px 130px -70px color-mix(in srgb, var(--accent) 75%, transparent),
    inset 0 1px 0 rgb(255 255 255 / 18%);
}
.spatial-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background: linear-gradient(180deg, rgb(255 255 255 / 8%), transparent 18%, transparent 72%, rgb(0 0 0 / 32%));
}
.spatial-poster,
.spatial-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.spatial-poster {
  object-fit: cover;
  object-position: 69% center;
  opacity: .84;
  filter: saturate(.9) contrast(1.05);
  transform: scale(1.04);
}
.spatial-canvas {
  z-index: 2;
  opacity: 0;
  transition: opacity 800ms ease;
}
.spatial-stage.is-spatial-ready .spatial-poster { opacity: .38; filter: saturate(.7) contrast(1.15) blur(1px); }
.spatial-stage.is-spatial-ready .spatial-canvas { opacity: 1; }
.spatial-window {
  position: absolute;
  z-index: 3;
  display: grid;
  gap: 5px;
  min-width: 150px;
  padding: 13px 15px;
  border: 1px solid rgb(255 255 255 / 34%);
  border-radius: 16px;
  color: #f7fbff;
  background: linear-gradient(145deg, rgb(12 18 31 / 78%), rgb(18 25 39 / 62%));
  box-shadow: 0 24px 55px rgb(0 0 0 / 42%), inset 0 1px 0 rgb(255 255 255 / 25%);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  transform-style: preserve-3d;
  transition: transform 180ms ease-out;
}
.spatial-window strong { font-size: 15px; letter-spacing: -.01em; }
.spatial-window small,
.spatial-window span { color: rgb(238 246 255 / 84%); font-size: 12px; }
.spatial-window code { color: #dff6ff; font-size: 20px; font-weight: 700; }
.window-dots { display: flex; gap: 5px; margin-bottom: 8px; }
.window-dots i { width: 7px; height: 7px; border-radius: 50%; background: #ff5f57; }
.window-dots i:nth-child(2) { background: #febc2e; }
.window-dots i:nth-child(3) { background: #28c840; }
.spatial-window-primary {
  top: 9%;
  left: 7%;
  transform: translate(calc(var(--pointer-x) * -10px), calc(var(--pointer-y) * 9px)) rotate(-4deg);
}
.spatial-window-metrics {
  right: 6%;
  top: 18%;
  transform: translate(calc(var(--pointer-x) * 16px), calc(var(--pointer-y) * 12px)) rotate(5deg);
}
.spatial-window-services {
  right: 10%;
  bottom: 13%;
  transform: translate(calc(var(--pointer-x) * 10px), calc(var(--pointer-y) * -14px)) rotate(-3deg);
}
.spatial-stage:not(.is-spatial-ready) .spatial-hint { display: none; }
.spatial-hint {
  position: absolute;
  z-index: 5;
  left: 20px;
  bottom: 16px;
  margin: 0;
  color: rgb(235 243 255 / 86%);
  font: 600 11px/1.2 ui-monospace, "JetBrains Mono", monospace;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* ---------- Story: one request through the machine ---------- */
.story-section {
  border-bottom: 1px solid var(--border);
  padding-block: 88px;
  background:
    linear-gradient(color-mix(in srgb, var(--fg) 4%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--fg) 4%, transparent) 1px, transparent 1px),
    color-mix(in srgb, var(--bg-2) 40%, var(--bg));
  background-size: 34px 34px, 34px 34px, auto;
}
.story-track {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: clamp(16px, 3vw, 40px);
  margin-top: 48px;
}
.story-rail { position: relative; }
.story-spine {
  position: absolute;
  inset: 0;
  width: 60px;
  height: 100%;
}
.spine-base {
  stroke: color-mix(in srgb, var(--fg) 14%, transparent);
  stroke-width: 2;
}
.spine-draw {
  stroke: var(--accent);
  stroke-width: 2;
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
}
.spine-packet {
  fill: var(--accent);
  filter: drop-shadow(0 0 6px color-mix(in srgb, var(--accent) 80%, transparent));
}
.story-chapters {
  display: grid;
  gap: clamp(48px, 8vh, 96px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.story-chapter {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  opacity: .62;
  transition: opacity .35s ease;
}
.story-chapter.is-passed { opacity: .85; }
.story-chapter.is-active { opacity: 1; }
.chapter-index code {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-2);
  border-radius: 10px;
  background: var(--panel);
  color: var(--muted);
  font-family: ui-monospace, "JetBrains Mono", "Fira Code", monospace;
  font-size: 14px;
  font-weight: 700;
  transition: color .3s ease, border-color .3s ease, background-color .3s ease;
}
.story-chapter.is-active .chapter-index code {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, var(--panel));
  color: var(--accent);
}
.chapter-card {
  max-width: 640px;
  padding: 24px 26px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 90%, transparent);
  transition: border-color .3s ease, box-shadow .3s ease;
}
.story-chapter.is-active .chapter-card {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  box-shadow: 0 20px 50px -36px color-mix(in srgb, var(--accent) 90%, transparent);
}
.chapter-card h3 {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: -0.02em;
}
.chapter-card p { margin: 10px 0 0; color: var(--muted); font-size: 15.5px; line-height: 1.6; }
.chapter-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.chapter-facts code {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--bg-2) 60%, transparent);
  color: var(--fg);
  font-family: ui-monospace, "JetBrains Mono", "Fira Code", monospace;
  font-size: 12px;
}
.chapter-repo {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--accent);
  font-family: ui-monospace, "JetBrains Mono", "Fira Code", monospace;
  font-size: 12px;
  font-weight: 600;
}
.chapter-repo:hover { border-color: var(--accent); text-decoration: none; }

.hero-art { display: flex; justify-content: center; min-width: 0; }
.control-panel {
  width: 100%;
  max-width: 600px;
  border: 1px solid color-mix(in srgb, var(--border-2) 75%, transparent);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 96%, transparent), color-mix(in srgb, var(--bg-2) 88%, transparent)),
    linear-gradient(135deg, color-mix(in srgb, var(--accent) 13%, transparent), color-mix(in srgb, var(--accent-2) 11%, transparent));
  box-shadow: 0 28px 70px -38px color-mix(in srgb, var(--accent) 70%, transparent), var(--shadow);
  overflow: hidden;
  margin-top: 24px;
}
.control-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--panel-2) 70%, transparent), transparent),
    color-mix(in srgb, var(--panel) 58%, transparent);
}
.control-panel-head > div {
  display: grid;
  gap: 2px;
  min-width: 0;
}
.panel-kicker {
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.control-panel-head strong {
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.2;
}
.panel-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  min-height: 32px;
  padding: 0 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  background: color-mix(in srgb, var(--panel) 72%, transparent);
  font-size: 12px;
  font-weight: 800;
}
.panel-live::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: currentColor;
  box-shadow: 0 0 0 4px color-mix(in srgb, currentColor 18%, transparent);
}
.panel-live[data-state="ok"] { color: var(--ok); }
.panel-live[data-state="fail"] { color: var(--danger); }
#detail { cursor: pointer; }
#detail summary {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 16px 0;
  list-style: none;
}
#detail summary::-webkit-details-marker { display: none; }

.control-map {
  position: relative;
  min-height: 370px;
  isolation: isolate;
  background:
    linear-gradient(color-mix(in srgb, var(--fg) 5%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--fg) 5%, transparent) 1px, transparent 1px);
  background-size: 34px 34px;
}
.control-lines {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  color: var(--accent);
  pointer-events: none;
}
.route {
  fill: none;
  stroke: color-mix(in srgb, currentColor 46%, transparent);
  stroke-width: 1.35;
  stroke-linecap: round;
  stroke-dasharray: 6 14;
  animation: route-flow 6s linear infinite;
}
.route-b,
.route-d,
.route-f,
.route-h {
  color: var(--accent-2);
  animation-delay: -2.2s;
}
.control-core {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 184px;
  min-height: 124px;
  padding: 18px 16px;
  border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--border));
  border-radius: 18px;
  background:
    radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 62%),
    color-mix(in srgb, var(--panel) 92%, transparent);
  box-shadow: 0 22px 48px -30px color-mix(in srgb, var(--accent) 95%, transparent);
  text-align: center;
  transform: translate(-50%, -50%);
}
.control-core::after {
  content: "";
  position: absolute;
  inset: -10px;
  z-index: -1;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 24px;
  animation: core-pulse 3.8s ease-in-out infinite;
}
.control-core span {
  color: var(--accent);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.control-core strong {
  margin-top: 6px;
  color: var(--fg);
  font-size: 22px;
  line-height: 1.05;
  letter-spacing: -0.025em;
}
.control-core small {
  margin-top: 8px;
  color: var(--muted);
  font-size: 11.5px;
  overflow-wrap: anywhere;
}
.control-node {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 9px;
  width: 138px;
  min-height: 56px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: color-mix(in srgb, var(--panel) 84%, transparent);
  color: var(--fg);
  font: inherit;
  font-size: 11.5px;
  font-weight: 800;
  line-height: 1.15;
  text-align: left;
}
.node-icon {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: 31px;
  height: 31px;
  border-radius: 9px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent);
}
.node-icon svg { width: 17px; height: 17px; display: block; }
.node-mail { left: 22px; top: 100px; }
.node-auth { left: 132px; top: 32px; }
.node-framework { right: 132px; top: 32px; }
.node-vpn { right: 22px; top: 100px; }
.node-drive { left: 20px; bottom: 70px; }
.node-router { right: 20px; bottom: 70px; }
.node-monitor { left: 96px; bottom: 18px; }
.node-dns { right: 96px; bottom: 18px; }
.control-map-note {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 0;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}
.control-map-note span + span::before,
.control-map-note span + time::before {
  content: "•";
  margin-right: 14px;
  color: color-mix(in srgb, var(--muted) 55%, transparent);
}
.control-readout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border-top: 1px solid var(--border);
  background: var(--border);
}
.control-readout span {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 16px;
  background: color-mix(in srgb, var(--panel) 76%, transparent);
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}
.control-readout strong {
  color: var(--fg);
  font-size: 16px;
  line-height: 1;
}

@keyframes route-flow {
  to { stroke-dashoffset: -80; }
}

@keyframes core-pulse {
  0%, 100% { opacity: .28; transform: scale(.98); }
  50% { opacity: .72; transform: scale(1.04); }
}


/* ---------- Hosting choices ---------- */
.deployment-section {
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 38%, transparent);
}
.deployment-grid {
  display: grid;
  grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.deployment-copy h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.025em;
}
.deployment-copy p,
.deployment-option p {
  color: var(--muted);
}
.deployment-copy p {
  max-width: 54ch;
  margin: 14px 0 0;
  font-size: 17px;
}
.deployment-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--panel) 76%, transparent);
}
.deployment-option {
  padding: clamp(22px, 3vw, 30px);
}
.deployment-option + .deployment-option {
  border-left: 1px solid var(--border);
}
.deployment-option h3 {
  margin: 0;
  font-size: 19px;
  letter-spacing: -0.015em;
}
.deployment-option p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.55;
}

/* ---------- Motion explainer ---------- */
.motion-section {
  border-bottom: 1px solid var(--border);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--panel) 48%, transparent), transparent 76%),
    color-mix(in srgb, var(--bg-2) 36%, transparent);
}
#motion { padding-block: 40px; }
.motion-grid {
  --shell: 100%;
  display: grid;
  grid-template-columns: minmax(260px, .45fr) minmax(0, 1.55fr);
  gap: clamp(24px, 3vw, 48px);
  align-items: center;
}
.motion-copy h2 {
  margin: 0;
  max-width: 11ch;
  font-size: clamp(32px, 4.8vw, 54px);
  line-height: 1.04;
  letter-spacing: -0.03em;
}
.motion-copy p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.58;
}
.motion-points {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}
.motion-points span {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: color-mix(in srgb, var(--panel) 60%, transparent);
  color: var(--fg);
  font-size: 13.5px;
  font-weight: 750;
}
.motion-points span::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 16%, transparent);
}
.motion-stage {
  position: relative;
  border: 1px solid color-mix(in srgb, var(--border-2) 74%, transparent);
  border-radius: var(--radius);
  background: #05070d;
  box-shadow: 0 30px 74px -45px color-mix(in srgb, var(--accent-2) 80%, transparent), var(--shadow);
  overflow: hidden;
}
.motion-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  border: 1px solid color-mix(in srgb, #fff 10%, transparent);
  border-radius: inherit;
  pointer-events: none;
}
.motion-video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #05070d;
}

/* ---------- Scroll reveal ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .42s ease, transform .42s ease;
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Suite ---------- */
.suite { display: grid; gap: 52px; }
.cat-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.cat-icon {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 13%, transparent);
  color: var(--accent);
}
.cat-icon svg { width: 23px; height: 23px; display: block; }
.cat-head h3 { margin: 0; font-size: 21px; letter-spacing: -0.02em; }
.cat-head p { margin: 3px 0 0; color: var(--muted); font-size: 14.5px; }

.cat-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }

.tile {
  display: flex;
  flex-direction: column;
  min-height: 196px;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), color-mix(in srgb, var(--bg-2) 60%, var(--panel)));
  box-shadow: var(--shadow);
  transition: transform .16s ease, border-color .16s ease;
}
.tile:hover { transform: translateY(-3px); border-color: var(--border-2); }
.tile-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
}
.tile-icon img { width: 48px; height: 48px; display: block; border-radius: 11px; }
.tile-icon svg { width: 24px; height: 24px; display: block; }
.tile-body { flex: 1; }
.tile-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.tile-top h4 { margin: 0; font-size: 18px; letter-spacing: -0.015em; }
.tile-kind {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.tile-prop { margin: 9px 0 0; color: var(--muted); font-size: 14.5px; line-height: 1.5; }

.tile-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 18px; }
.tile-open {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid var(--border-2);
  border-radius: 9px;
  color: var(--fg);
  font-size: 13.5px;
  font-weight: 700;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.tile-open svg { width: 14px; height: 14px; }
.tile-open:hover {
  text-decoration: none;
  color: var(--on-accent);
  background: var(--accent);
  border-color: var(--accent);
}
.tile-flag {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px dashed var(--border-2);
  border-radius: 9px;
  color: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
}
.tile-src {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel-2) 50%, transparent);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  overflow-wrap: anywhere;
}
.tile-src:hover { color: var(--fg); border-color: var(--border-2); text-decoration: none; }

/* ---------- Why / features ---------- */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature {
  padding: 26px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), color-mix(in srgb, var(--bg-2) 55%, var(--panel)));
}
.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  border-radius: 13px;
  background: color-mix(in srgb, var(--accent) 13%, transparent);
  color: var(--accent);
}
.feature-icon svg { width: 25px; height: 25px; display: block; }
.feature h3 { margin: 0 0 8px; font-size: 18px; letter-spacing: -0.015em; }
.feature p { margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.55; }

/* ---------- Proof / lightweight numbers ---------- */
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.proof-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}
.proof-task { margin: 0; color: var(--muted); font-size: 12px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; }
.proof-big {
  margin: 16px 0 2px;
  color: var(--accent);
  font-size: 38px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}
.proof-sub { margin: 0; color: var(--fg); font-size: 14px; font-weight: 600; }
.proof-vs {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.proof-vs > span:first-child { color: var(--fg); font-size: 15px; font-weight: 600; }
.proof-other { color: var(--muted); font-size: 13px; }
.proof-diff { margin: 16px 0 18px; color: var(--ok); font-size: 15px; font-weight: 800; }
.proof-src { margin-top: auto; color: var(--muted); font-size: 12.5px; font-weight: 600; }
.proof-src:hover { color: var(--accent); }
.proof.section { padding-block: 40px; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; }
  .spatial-stage { min-height: min(68vw, 620px); }
  .hero-art { justify-content: flex-start; }
  .motion-grid { grid-template-columns: 1fr; }
  .motion-copy h2 { max-width: 16ch; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sources-section { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .shell { width: min(var(--shell), 100% - 32px); }
  .section { padding-block: 64px; }
  .story-section { padding-block: 64px; }
  .story-track { grid-template-columns: 34px minmax(0, 1fr); gap: 12px; }
  .story-spine { width: 34px; }
  .story-chapter { grid-template-columns: 1fr; }
  .chapter-index { display: none; }
  .deployment-grid,
  .deployment-options { grid-template-columns: 1fr; }
  .deployment-option + .deployment-option {
    border-top: 1px solid var(--border);
    border-left: 0;
  }
  .topbar { padding: 10px 18px; }
  .nav-links { gap: 14px; }
  .suite { gap: 40px; }
  .cat-grid { grid-template-columns: 1fr; }
  .control-readout { grid-template-columns: 1fr; }
  .trust { grid-template-columns: repeat(2, 1fr); gap: 28px 18px; }
}

@media (max-width: 560px) {
  .topbar { padding-inline: 12px; }
  .brand { gap: 7px; }
  .brand-mark { width: 28px; height: 28px; border-radius: 8px; }
  .nav-links { gap: 10px; }
  .nav-links .nav-source { display: none; }
  .nav-links a { min-height: 44px; display: inline-flex; align-items: center; font-size: 14px; }
  .nav-links .nav-signin { min-height: 44px; padding-inline: 13px; color: #fff; }
  .hero { padding-block-start: 40px; }
  .hero-copy .lede { font-size: 16px; line-height: 1.5; }
  .hero-copy .btn-row { display: grid; grid-template-columns: 1fr; }
  .hero-meta { margin-top: 10px; }
  .spatial-stage { min-height: 380px; border-radius: 24px; }
  .spatial-poster { object-position: 72% center; }
  .spatial-window { min-width: 124px; padding: 10px 12px; border-radius: 14px; }
  .spatial-window-primary { top: 5%; left: 4%; }
  .spatial-window-metrics { top: 15%; right: 3%; }
  .spatial-window-services { right: 4%; bottom: 10%; }
  .spatial-hint { left: 14px; bottom: 10px; font-size: 9px; }
  .hero-art { display: none; }
  .control-panel-head { align-items: flex-start; flex-direction: column; }
  .control-map { min-height: 430px; background-size: 26px 26px; }
  .control-core { width: 152px; min-height: 108px; border-radius: 15px; }
  .control-core strong { font-size: 18px; }
  .control-node {
    width: 98px;
    min-height: 54px;
    gap: 6px;
    padding: 7px;
    border-radius: 11px;
    font-size: 10px;
  }
  .node-icon { width: 27px; height: 27px; border-radius: 8px; }
  .node-icon svg { width: 15px; height: 15px; }
  .node-mail { left: 4px; top: 115px; }
  .node-vpn { right: 4px; top: 115px; }
  .node-auth { left: 22px; top: 22px; }
  .node-framework { right: 22px; top: 22px; }
  .node-drive { left: 4px; bottom: 84px; }
  .node-router { right: 4px; bottom: 84px; }
  .node-monitor { left: 54px; bottom: 18px; }
  .node-dns { right: 54px; bottom: 18px; }
  .motion-stage { border-radius: 12px; }
  .features { grid-template-columns: 1fr; }
  .proof-grid { grid-template-columns: 1fr; }
  .btn-row .btn { flex: 1 1 auto; }
}

@media (max-width: 380px) {
  .trust { grid-template-columns: 1fr; }
  .control-node { width: 92px; font-size: 9.5px; }
  .node-monitor { left: 40px; }
  .node-dns { right: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .spatial-canvas { display: none; }
  .spatial-poster { opacity: .84 !important; filter: saturate(.9) contrast(1.05) !important; }
  .spatial-window { transform: none !important; }
  .spatial-hint { display: none; }
}

/* ---------- Theme picker (header) — token-driven ---------- */
.theme-picker { display: inline-flex; align-items: center; }
.theme-select {
  appearance: none;
  -webkit-appearance: none;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 7px 28px 7px 11px;
  cursor: pointer;
  line-height: 1.2;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 15px) center, calc(100% - 10px) center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  transition: border-color .15s ease, background-color .15s ease;
}
.theme-select:hover { border-color: var(--border-2); }
.theme-select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.theme-select optgroup { color: var(--fg); background: var(--panel); font-weight: 700; }
.theme-select option { color: var(--fg); background: var(--panel); font-weight: 500; }

/* Language toggle (IS/EN) — segmented control, token-driven. */
.lang-toggle { display: inline-flex; align-items: center; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.lang-opt { appearance: none; border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 12px; font-weight: 700; letter-spacing: .02em; padding: 5px 9px; cursor: pointer; line-height: 1; transition: background-color .15s ease, color .15s ease; }
.lang-opt + .lang-opt { border-left: 1px solid var(--border); }
.lang-opt:hover { color: var(--fg); }
.lang-opt.is-active { background: var(--accent); color: var(--on-accent, #fff); }
.lang-opt:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

/* ---------- OLI-105: a11y + responsive polish ---------- */
.skip-link { position: absolute; left: 12px; top: -48px; z-index: 100; padding: 10px 16px; border-radius: var(--radius-sm); background: var(--accent); color: var(--on-accent); font-weight: 700; }
.skip-link:focus { top: 12px; text-decoration: none; }
a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
main:focus { outline: none; }
.cat-grid, .suite-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); gap: 16px; }
@media (max-width: 640px) { .hero h1 { font-size: clamp(32px, 11vw, 44px); } }