/* ============================================================
   LIGHTWEAVE — Design System  ·  "Plasma route"
   Warm light is motion. Cool ion-white is proof.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Big+Shoulders+Display:wght@500;600;700;800;900&family=Hanken+Grotesk:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ---------- Tokens ---------- */
:root {
  /* Grounds — warm-biased obsidian, chosen not defaulted */
  --ink-900: #050406;
  --ink-850: #0b0a0e;
  --ink-800: #100d13;
  --ink-750: #15111a;
  --ink-700: #1c1722;
  --ink-650: #241d2c;
  --ink-600: #2f2739;

  /* Text — warm off-white */
  --fg:        #f6eef0;
  --fg-soft:   #cfc3cb;
  --fg-mute:   #9b8f9c;
  --fg-faint:  #665c69;

  /* Warm signature — MOTION (plasma) — names kept for compatibility */
  --aqua:   #ff4d6d;  /* coral  (primary hot) */
  --aqua-2: #ff6f5c;  /* coral-orange */
  --route:  #ff9a4d;  /* amber  (path)  */
  --route-2:#ff7a3c;  /* deep amber */
  --violet: #ff5e9c;  /* hot magenta (lane) */

  /* Cool signal — PROOF (rare, only at verification) */
  --gold:   #eaf6ff;  /* ion-white */
  --gold-2: #bfe3ff;  /* ion-cyan edge */

  /* Semantic — kept distinct from the hot accent */
  --good:  #4de3a4;
  --warn:  #ffcf5e;
  --crit:  #ff5470;

  /* Glass surfaces */
  --glass:        rgba(255,255,255,0.028);
  --glass-2:      rgba(255,255,255,0.05);
  --glass-hi:     rgba(255,255,255,0.09);
  --hairline:     rgba(255,255,255,0.09);
  --hairline-hi:  rgba(255,255,255,0.17);
  --glow-aqua:  0 0 0 1px rgba(255,77,109,0.35), 0 8px 40px -8px rgba(255,77,109,0.4);
  --glow-gold:  0 0 0 1px rgba(234,246,255,0.5), 0 8px 44px -6px rgba(191,227,255,0.4);

  /* Type */
  --f-display: "Big Shoulders Display", "Arial Narrow", system-ui, sans-serif;
  --f-body:    "Hanken Grotesk", system-ui, sans-serif;
  --f-mono:    "JetBrains Mono", ui-monospace, monospace;

  /* Scale */
  --step--1: clamp(0.78rem, 0.76rem + 0.1vw, 0.84rem);
  --step-0:  clamp(0.95rem, 0.92rem + 0.15vw, 1.02rem);
  --step-1:  clamp(1.15rem, 1.05rem + 0.5vw, 1.35rem);
  --step-2:  clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --step-3:  clamp(2rem, 1.6rem + 2vw, 3rem);
  --step-4:  clamp(2.8rem, 2rem + 4vw, 5.2rem);
  --step-5:  clamp(3.6rem, 2.2rem + 7vw, 8.5rem);

  --r-sm: 10px;
  --r:    16px;
  --r-lg: 22px;
  --r-xl: 30px;
  --pad:  clamp(1.2rem, 5vw, 2.2rem);
  --maxw: 1200px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* Light "day" theme — for the app used all day */
:root[data-theme="light"] {
  --ink-900: #f3eef0;
  --ink-850: #faf6f7;
  --ink-800: #ffffff;
  --ink-750: #fbf7f9;
  --ink-700: #f3eef1;
  --ink-650: #eae2e7;
  --ink-600: #ddd2da;
  --fg:      #1a1119;
  --fg-soft: #4a3d47;
  --fg-mute: #786a75;
  --fg-faint:#a99ba6;
  --aqua:   #e11d48;
  --aqua-2: #e0483a;
  --route:  #d97706;
  --violet: #db2777;
  --gold:   #1f6fd0;  /* ion reads as deep cool blue on light */
  --gold-2: #2a7fe0;
  --glass:       rgba(26,17,25,0.025);
  --glass-2:     rgba(26,17,25,0.045);
  --glass-hi:    rgba(26,17,25,0.07);
  --hairline:    rgba(26,17,25,0.10);
  --hairline-hi: rgba(26,17,25,0.18);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--f-body);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--fg);
  background: var(--ink-850);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, canvas, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
::selection { background: rgba(255,77,109,0.3); color: #fff; }

/* ---------- Ambient field ---------- */
.z-field { position: fixed; inset: 0; z-index: -2; pointer-events: none; }
.z-veil {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(90% 60% at 50% -8%, rgba(255,77,109,0.12), transparent 60%),
    radial-gradient(70% 50% at 88% 8%, rgba(255,154,77,0.09), transparent 55%),
    radial-gradient(60% 50% at 8% 20%, rgba(255,94,156,0.07), transparent 55%),
    linear-gradient(180deg, transparent 42%, var(--ink-900) 100%);
}
:root[data-theme="light"] .z-veil {
  background:
    radial-gradient(90% 60% at 50% -8%, rgba(225,29,72,0.10), transparent 60%),
    radial-gradient(70% 50% at 88% 8%, rgba(217,119,6,0.08), transparent 55%),
    linear-gradient(180deg, transparent 50%, var(--ink-900) 100%);
}

/* ---------- Layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad); }
.wrap-wide { max-width: 1360px; }
section { position: relative; }
.section-pad { padding-block: clamp(4rem, 10vw, 8rem); }

.eyebrow {
  font-family: var(--f-mono);
  font-size: var(--step--1);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--aqua);
  display: inline-flex; align-items: center; gap: 0.6em;
}
.eyebrow::before {
  content: ""; width: 22px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--aqua));
}

/* ---------- Type ---------- */
.display, .h1, .h2, h1.display {
  font-family: var(--f-display); font-weight: 800; line-height: 0.92;
  letter-spacing: 0.005em; text-wrap: balance; text-transform: uppercase;
}
h3, h4, .h3, .h4 {
  font-family: var(--f-body); font-weight: 700; line-height: 1.08;
  letter-spacing: -0.02em; text-wrap: balance;
}
.display { font-size: var(--step-5); font-weight: 900; line-height: 0.86; }
.h1 { font-size: var(--step-4); }
.h2 { font-size: var(--step-3); }
.h3 { font-size: var(--step-2); }
.h4 { font-size: var(--step-1); }
.lede { font-size: var(--step-1); color: var(--fg-soft); line-height: 1.5; max-width: 40ch; text-wrap: balance; }
.muted { color: var(--fg-mute); }
.mono { font-family: var(--f-mono); }
.measure { max-width: 62ch; }
.grad-text {
  background: linear-gradient(100deg, var(--aqua) 5%, var(--route) 55%, var(--violet));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  --bg: var(--glass-2);
  display: inline-flex; align-items: center; justify-content: center; gap: 0.55em;
  padding: 0.82em 1.4em;
  font-family: var(--f-body); font-weight: 600; font-size: var(--step-0);
  border-radius: 999px; border: 1px solid var(--hairline);
  background: var(--bg); color: var(--fg);
  cursor: pointer; position: relative;
  transition: transform .35s var(--ease), border-color .3s, background .3s, box-shadow .4s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); border-color: var(--hairline-hi); background: var(--glass-hi); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--aqua); outline-offset: 3px; }
.btn svg { width: 1.1em; height: 1.1em; }

.btn-primary {
  border: none; color: #2a0710; font-weight: 700;
  background: linear-gradient(100deg, var(--aqua), #ff7a5c 55%, var(--route));
  box-shadow: 0 10px 30px -10px rgba(255,90,90,0.6), inset 0 1px 0 rgba(255,255,255,0.35);
}
.btn-primary:hover { box-shadow: 0 16px 46px -10px rgba(255,90,90,0.75), inset 0 1px 0 rgba(255,255,255,0.45); background: linear-gradient(100deg, #ff6480, #ff8f6a 55%, #ffab63); }
.btn-ghost { background: transparent; }
.btn-lg { padding: 1.05em 1.8em; font-size: var(--step-1); }
.btn-sm { padding: 0.55em 1em; font-size: var(--step--1); }
/* Proof action — cool ion, deliberately opposite temperature */
.btn-verify {
  border: 1px solid rgba(234,246,255,0.5); color: #eaf6ff; font-weight: 700;
  background: linear-gradient(100deg, rgba(234,246,255,0.14), rgba(191,227,255,0.06));
  box-shadow: inset 0 0 20px rgba(191,227,255,0.15), 0 8px 30px -12px rgba(191,227,255,0.4);
}
.btn-verify:hover { background: linear-gradient(100deg, rgba(234,246,255,0.22), rgba(191,227,255,0.1)); }

/* ---------- Surfaces / glass ---------- */
.glass {
  position: relative;
  background: linear-gradient(180deg, var(--glass-2), var(--glass));
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
}
.glass-hi { background: linear-gradient(180deg, var(--glass-hi), var(--glass-2)); border-color: var(--hairline-hi); }
.glow-edge::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: linear-gradient(120deg, rgba(255,77,109,0.55), transparent 40%, transparent 60%, rgba(255,154,77,0.45));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.pad { padding: clamp(1.3rem, 3vw, 2rem); }
.pad-lg { padding: clamp(1.8rem, 4vw, 3rem); }

/* ---------- Pills / chips / badges ---------- */
.pill {
  display: inline-flex; align-items: center; gap: 0.5em;
  padding: 0.4em 0.85em; border-radius: 999px;
  font-size: var(--step--1); font-weight: 500;
  border: 1px solid var(--hairline); background: var(--glass); color: var(--fg-soft);
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--fg-mute); }
.pill-good { border-color: rgba(77,227,164,0.35); color: var(--good); background: rgba(77,227,164,0.08); }
.pill-good .dot { background: var(--good); box-shadow: 0 0 10px var(--good); }
.pill-warn { border-color: rgba(255,207,94,0.35); color: var(--warn); background: rgba(255,207,94,0.08); }
.pill-warn .dot { background: var(--warn); box-shadow: 0 0 10px var(--warn); }
.pill-route { border-color: rgba(255,77,109,0.35); color: var(--aqua); background: rgba(255,77,109,0.08); }
.pill-route .dot { background: var(--aqua); box-shadow: 0 0 10px var(--aqua); }
.pill-verify { border-color: rgba(191,227,255,0.5); color: var(--gold); background: rgba(191,227,255,0.09); }
.pill-verify .dot { background: var(--gold); box-shadow: 0 0 10px var(--gold-2); }

.badge-verified {
  display: inline-flex; align-items: center; gap: 0.6em;
  padding: 0.55em 1em 0.55em 0.7em; border-radius: 999px;
  font-family: var(--f-body); font-weight: 700; font-size: var(--step--1);
  letter-spacing: 0.01em; color: var(--gold);
  border: 1px solid rgba(191,227,255,0.55);
  background: radial-gradient(120% 120% at 0% 50%, rgba(234,246,255,0.18), rgba(191,227,255,0.05));
  box-shadow: inset 0 0 18px rgba(191,227,255,0.16);
}

/* ---------- Nav ---------- */
.z-nav {
  position: sticky; top: 0; z-index: 60;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.85rem var(--pad);
  border-bottom: 1px solid transparent;
  transition: background .4s, border-color .4s, backdrop-filter .4s;
}
.z-nav.scrolled {
  background: color-mix(in srgb, var(--ink-850) 72%, transparent);
  backdrop-filter: blur(18px) saturate(1.4); -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-color: var(--hairline);
}
.z-logo { display: inline-flex; align-items: center; gap: 0.55em; font-family: var(--f-display); font-weight: 700; font-size: 1.5rem; letter-spacing: 0.02em; text-transform: uppercase; }
.z-logo .mark { width: 26px; height: 26px; }
.z-nav-links { display: flex; gap: 0.35rem; margin-left: 0.5rem; }
.z-nav-links a { padding: 0.5em 0.9em; border-radius: 999px; font-size: var(--step--1); color: var(--fg-soft); font-weight: 500; transition: color .25s, background .25s; }
.z-nav-links a:hover, .z-nav-links a.active { color: var(--fg); background: var(--glass-2); }
.z-nav-right { margin-left: auto; display: flex; align-items: center; gap: 0.6rem; }
.z-nav-toggle { display: none; }

.icon-btn {
  width: 38px; height: 38px; display: inline-grid; place-items: center;
  border-radius: 50%; border: 1px solid var(--hairline); background: var(--glass);
  cursor: pointer; transition: background .25s, border-color .25s, transform .25s;
}
.icon-btn:hover { background: var(--glass-hi); transform: translateY(-1px); }
.icon-btn svg { width: 18px; height: 18px; }

/* ---------- Hero media (video slot) ---------- */
.hero-media { position: absolute; inset: 0; overflow: hidden; z-index: 0; }
.hero-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; background: transparent; }
.hero-plasma { position: absolute; inset: -15%; z-index: -1; filter: blur(38px) saturate(1.2); opacity: 0.85; }
.hero-plasma i {
  position: absolute; border-radius: 50%; mix-blend-mode: screen;
}
.hero-plasma .p1 { width: 46vw; height: 46vw; left: 6%; top: 2%; background: radial-gradient(circle, rgba(255,77,109,0.7), transparent 62%); animation: drift1 20s var(--ease-in-out) infinite; }
.hero-plasma .p2 { width: 40vw; height: 40vw; right: 4%; top: 18%; background: radial-gradient(circle, rgba(255,154,77,0.6), transparent 62%); animation: drift2 26s var(--ease-in-out) infinite; }
.hero-plasma .p3 { width: 34vw; height: 34vw; left: 34%; top: 30%; background: radial-gradient(circle, rgba(255,94,156,0.55), transparent 62%); animation: drift3 30s var(--ease-in-out) infinite; }
/* Cool ion variant — used on the Security / verification hero */
.hero-plasma-cool .p1 { background: radial-gradient(circle, rgba(234,246,255,0.55), transparent 62%); }
.hero-plasma-cool .p2 { background: radial-gradient(circle, rgba(191,227,255,0.5), transparent 62%); }
.hero-plasma-cool .p3 { background: radial-gradient(circle, rgba(150,200,255,0.45), transparent 62%); }
@keyframes drift1 { 50% { transform: translate(8%, 10%) scale(1.15); } }
@keyframes drift2 { 50% { transform: translate(-10%, 6%) scale(1.1); } }
@keyframes drift3 { 50% { transform: translate(6%, -8%) scale(1.2); } }
.hero-scrim {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 80% at 30% 40%, transparent, rgba(11,10,14,0.55) 75%),
    linear-gradient(180deg, rgba(11,10,14,0.35), transparent 30%, var(--ink-850) 96%),
    linear-gradient(90deg, var(--ink-850) 2%, transparent 55%);
}
:root[data-theme="light"] .hero-scrim { background: radial-gradient(120% 80% at 30% 40%, transparent, rgba(250,246,247,0.4) 75%), linear-gradient(180deg, transparent 40%, var(--ink-850) 96%), linear-gradient(90deg, var(--ink-850) 0%, transparent 55%); }

/* ---------- Route visual ---------- */
.route-node { display: inline-flex; flex-direction: column; align-items: center; gap: 0.5rem; text-align: center; }
.route-node .orb {
  width: 54px; height: 54px; border-radius: 50%; display: grid; place-items: center; position: relative;
  border: 1px solid var(--hairline-hi); background: radial-gradient(circle at 35% 30%, var(--glass-hi), var(--glass));
}
.route-node .orb::after { content: ""; position: absolute; inset: -6px; border-radius: 50%; border: 1px solid var(--hairline); opacity: .5; }
.route-node.live .orb { box-shadow: 0 0 0 1px rgba(255,77,109,0.5), 0 0 28px rgba(255,77,109,0.45); }
.route-node .orb svg { width: 22px; height: 22px; color: var(--aqua); }
.route-node .label { font-size: var(--step--1); color: var(--fg-mute); }

/* ---------- Progress ---------- */
.z-progress { height: 8px; border-radius: 999px; background: var(--glass-2); overflow: hidden; position: relative; }
.z-progress > span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--aqua), var(--route)); position: relative; transition: width 1s var(--ease); }
.z-progress.verify > span { background: linear-gradient(90deg, var(--gold-2), #eaf6ff); }
.z-progress .stripe { position: absolute; inset: 0; background-image: linear-gradient(115deg, transparent 40%, rgba(255,255,255,0.4) 50%, transparent 60%); background-size: 200% 100%; animation: sheen 1.6s linear infinite; }
@keyframes sheen { to { background-position: -200% 0; } }

.stage-track { display: flex; align-items: center; gap: 0; }
.stage-step { flex: 1; display: flex; flex-direction: column; gap: 0.5rem; position: relative; }
.stage-step .node { width: 12px; height: 12px; border-radius: 50%; background: var(--glass-hi); border: 1px solid var(--hairline-hi); position: relative; z-index: 2; }
.stage-step.done .node { background: var(--aqua); border-color: var(--aqua); box-shadow: 0 0 12px var(--aqua); }
.stage-step.active .node { background: var(--route); border-color: var(--route); box-shadow: 0 0 14px var(--route); animation: pulse 1.5s infinite; }
.stage-step.verified .node { background: var(--gold); border-color: var(--gold); box-shadow: 0 0 14px var(--gold-2); }
.stage-step .bar { position: absolute; top: 5px; left: 12px; right: 0; height: 2px; background: var(--hairline); z-index: 1; }
.stage-step.done .bar { background: linear-gradient(90deg, var(--aqua), var(--route)); }
.stage-step:last-child .bar { display: none; }
.stage-step .name { font-size: var(--step--1); color: var(--fg-mute); }
.stage-step.active .name, .stage-step.done .name { color: var(--fg); }
@keyframes pulse { 0%,100% { transform: scale(1); } 50% { transform: scale(1.35); } }

/* ---------- Stat / data ---------- */
.stat { display: flex; flex-direction: column; gap: 0.15rem; }
.stat .num { font-family: var(--f-display); font-weight: 700; font-size: var(--step-2); letter-spacing: 0.01em; font-variant-numeric: tabular-nums; }
.stat .lab { font-size: var(--step--1); color: var(--fg-mute); font-family: var(--f-mono); letter-spacing: 0.04em; }
.tabular { font-variant-numeric: tabular-nums; }

.kv { display: flex; justify-content: space-between; gap: 1rem; padding: 0.75rem 0; border-bottom: 1px solid var(--hairline); }
.kv:last-child { border-bottom: none; }
.kv dt { color: var(--fg-mute); font-size: var(--step--1); }
.kv dd { font-family: var(--f-mono); font-size: var(--step--1); text-align: right; }

/* ---------- Grid helpers ---------- */
.grid { display: grid; gap: clamp(1rem, 2.5vw, 1.6rem); }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
.flow { display: flex; flex-direction: column; gap: 1.1rem; }
.row { display: flex; align-items: center; gap: 0.8rem; }
.between { justify-content: space-between; }
.wrap-row { flex-wrap: wrap; }

/* ---------- Feature cards ---------- */
.feature { padding: clamp(1.4rem,3vw,2.1rem); border-radius: var(--r-lg); border: 1px solid var(--hairline); background: linear-gradient(180deg, var(--glass-2), transparent); transition: border-color .3s, transform .4s var(--ease), background .3s; }
.feature:hover { border-color: var(--hairline-hi); transform: translateY(-4px); background: linear-gradient(180deg, var(--glass-hi), var(--glass)); }
.feature .ficon { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 1.1rem; border: 1px solid var(--hairline); background: radial-gradient(circle at 30% 25%, rgba(255,77,109,0.18), transparent 70%); color: var(--aqua); }
.feature .ficon svg { width: 22px; height: 22px; }
.feature h3 { font-size: var(--step-1); margin-bottom: 0.5rem; }
.feature p { color: var(--fg-mute); font-size: var(--step-0); }

/* ---------- Dropzone ---------- */
.dropzone {
  position: relative; border-radius: var(--r-xl);
  border: 1.5px dashed var(--hairline-hi);
  background: radial-gradient(120% 100% at 50% 0%, rgba(255,77,109,0.07), transparent 60%);
  padding: clamp(2rem, 6vw, 4rem); text-align: center;
  transition: border-color .3s, background .3s, transform .3s; cursor: pointer; overflow: hidden;
}
.dropzone:hover, .dropzone.drag { border-color: var(--aqua); background: radial-gradient(120% 100% at 50% 0%, rgba(255,77,109,0.14), transparent 60%); }
.dropzone .ring { width: 84px; height: 84px; margin: 0 auto 1.4rem; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--hairline-hi); background: var(--glass); position: relative; }
.dropzone .ring svg { width: 34px; height: 34px; color: var(--aqua); }
.dropzone .ring::before { content: ""; position: absolute; inset: -10px; border-radius: 50%; border: 1px dashed var(--hairline); animation: spin 24s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Forms ---------- */
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label { font-size: var(--step--1); color: var(--fg-mute); font-weight: 500; }
.input, .textarea {
  width: 100%; padding: 0.8em 1em; border-radius: var(--r-sm);
  background: var(--glass); border: 1px solid var(--hairline); color: var(--fg);
  transition: border-color .25s, background .25s;
}
.input:focus, .textarea:focus { outline: none; border-color: var(--aqua); background: var(--glass-2); }
.input::placeholder { color: var(--fg-faint); }

/* ---------- Table ---------- */
.z-table { width: 100%; border-collapse: collapse; font-size: var(--step-0); }
.z-table th { text-align: left; font-family: var(--f-mono); font-size: var(--step--1); font-weight: 500; letter-spacing: 0.04em; color: var(--fg-mute); padding: 0.7rem 1rem; border-bottom: 1px solid var(--hairline); text-transform: uppercase; }
.z-table td { padding: 0.9rem 1rem; border-bottom: 1px solid var(--hairline); }
.z-table tr:last-child td { border-bottom: none; }
.z-table tbody tr { transition: background .2s; }
.z-table tbody tr:hover { background: var(--glass); }

/* ---------- Footer ---------- */
.z-footer { border-top: 1px solid var(--hairline); margin-top: 4rem; padding-block: clamp(3rem, 6vw, 5rem); }
.z-footer a { color: var(--fg-mute); font-size: var(--step-0); transition: color .2s; }
.z-footer a:hover { color: var(--fg); }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .dropzone .ring::before, .z-progress .stripe, .stage-step.active .node,
  .hero-plasma i { animation: none !important; }
}

/* ---------- App shell ---------- */
.app { display: grid; grid-template-columns: 260px 1fr; min-height: 100vh; }
.app-side { border-right: 1px solid var(--hairline); padding: 1.4rem 1rem; position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; gap: 0.3rem; background: color-mix(in srgb, var(--ink-800) 60%, transparent); backdrop-filter: blur(10px); }
.app-main { padding: clamp(1.4rem, 4vw, 2.6rem); min-width: 0; }
.side-link { display: flex; align-items: center; gap: 0.75rem; padding: 0.65rem 0.85rem; border-radius: 12px; color: var(--fg-mute); font-size: var(--step-0); font-weight: 500; transition: color .2s, background .2s; }
.side-link svg { width: 18px; height: 18px; }
.side-link:hover { color: var(--fg); background: var(--glass); }
.side-link.active { color: var(--fg); background: var(--glass-2); box-shadow: inset 2px 0 0 var(--aqua); }
.side-group { font-family: var(--f-mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-faint); padding: 1rem 0.85rem 0.4rem; }

/* ---------- Utilities ---------- */
.hide { display: none !important; }
.center { text-align: center; }
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.6rem; } .mt-4 { margin-top: 2.4rem; }
.gap-sm { gap: 0.5rem; } .gap-lg { gap: 1.6rem; }
.divider { height: 1px; background: var(--hairline); border: none; }
.dim { color: var(--fg-mute); }
.nowrap { white-space: nowrap; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .cols-4 { grid-template-columns: repeat(2, 1fr); }
  .cols-3 { grid-template-columns: 1fr; }
  .app { grid-template-columns: 1fr; }
  .app-side { position: fixed; left: 0; top: 0; z-index: 80; width: 260px; transform: translateX(-100%); transition: transform .35s var(--ease); }
  .app-side.open { transform: none; }
  .z-nav-links { display: none; }
  .z-nav-toggle { display: inline-grid; }
}
@media (max-width: 640px) {
  .cols-2, .cols-4 { grid-template-columns: 1fr; }
  .hide-sm { display: none !important; }
}