/* =========================================================================
   Zelnoo — Feature Showcase Design System
   One stylesheet, per-page accent via --accent / --accent-2 on :root
   ========================================================================= */

:root {
  --ink: #0b1220;
  --ink-soft: #2b3650;
  --muted: #5b6678;
  --faint: #8893a7;
  --line: #e7ebf2;
  --line-soft: #eef2f7;
  --bg: #ffffff;
  --bg-alt: #f6f8fc;
  --bg-tint: #f0f4fb;
  --white: #ffffff;

  /* default accent (overridden per page) */
  --accent: #2563eb;
  --accent-2: #6366f1;
  --accent-ink: #1e3a8a;
  --accent-wash: rgba(37, 99, 235, 0.08);

  --radius: 16px;
  --radius-sm: 11px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.05), 0 1px 3px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 8px 24px -10px rgba(16, 24, 40, 0.18);
  --shadow-lg: 0 28px 60px -22px rgba(13, 20, 40, 0.45);
  --maxw: 1120px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 { margin: 0; line-height: 1.18; letter-spacing: -0.02em; font-weight: 750; }

p { margin: 0; }

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

/* ---------------------------------------------------------------- Top nav */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line-soft);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: -0.03em; font-size: 18px; }
.brand .dot {
  width: 26px; height: 26px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 4px 14px -4px var(--accent);
  display: grid; place-items: center; color: #fff; font-size: 14px; font-weight: 800;
}
.brand small { color: var(--faint); font-weight: 600; letter-spacing: 0; font-size: 12.5px; }
.topnav { display: flex; align-items: center; gap: 8px; }
.topnav a {
  font-size: 13.5px; font-weight: 600; color: var(--muted);
  padding: 8px 13px; border-radius: 9px; transition: all .15s ease;
}
.topnav a:hover { color: var(--ink); background: var(--bg-alt); }
.topnav a.primary {
  color: var(--accent); background: var(--accent-wash);
}
.topnav a.primary:hover { color: #fff; background: var(--accent); }

/* ------------------------------------------------------------------- Hero */
.hero { position: relative; overflow: hidden; background: var(--ink); color: #fff; }
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(120% 90% at 88% -10%, color-mix(in srgb, var(--accent) 55%, transparent), transparent 60%),
    radial-gradient(90% 80% at 0% 110%, color-mix(in srgb, var(--accent-2) 45%, transparent), transparent 55%);
  opacity: .9;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(120% 80% at 70% 0%, #000, transparent 75%);
}
.hero .wrap { position: relative; z-index: 2; padding: 74px 24px 84px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 12.5px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: #fff; background: rgba(255,255,255,.12);
  padding: 7px 14px; border-radius: 999px; border: 1px solid rgba(255,255,255,.18);
}
.eyebrow .dotmark { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 30%, transparent); }
.hero h1 { font-size: clamp(34px, 5.4vw, 58px); margin: 22px 0 0; font-weight: 800; max-width: 16ch; }
.hero .lede { margin-top: 18px; font-size: clamp(16px, 1.6vw, 19px); color: rgba(255,255,255,.82); max-width: 60ch; font-weight: 420; }
.hero .tag-row { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 9px; }
.tag {
  font-size: 12.5px; font-weight: 600; color: rgba(255,255,255,.92);
  padding: 6px 12px; border-radius: 8px; background: rgba(255,255,255,.09);
  border: 1px solid rgba(255,255,255,.14);
}

/* hero stat strip */
.statstrip {
  position: relative; z-index: 3; margin-top: -38px;
}
.statstrip .grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-lg);
}
.stat .num {
  font-size: clamp(24px, 3vw, 33px); font-weight: 800; letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.stat .lbl { font-size: 12.5px; color: var(--muted); font-weight: 600; margin-top: 3px; }

/* ---------------------------------------------------------------- Sections */
section.block { padding: 60px 0 12px; }
.kicker {
  font-size: 12.5px; font-weight: 750; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent);
}
.h2 { font-size: clamp(24px, 3vw, 32px); margin-top: 10px; }
.section-lede { color: var(--muted); margin-top: 12px; max-width: 70ch; font-size: 16px; }

/* feature card grid */
.cards { display: grid; gap: 16px; margin-top: 30px; }
.cards.c3 { grid-template-columns: repeat(3, 1fr); }
.cards.c2 { grid-template-columns: repeat(2, 1fr); }
.cards.c4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--accent) 30%, var(--line)); }
.card .ic {
  width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center;
  background: var(--accent-wash); color: var(--accent); font-size: 21px; margin-bottom: 15px;
}
.card h3 { font-size: 16.5px; font-weight: 700; }
.card p { color: var(--muted); font-size: 14px; margin-top: 8px; }
.card ul { margin: 11px 0 0; padding-left: 0; list-style: none; }
.card ul li { position: relative; padding-left: 20px; color: var(--ink-soft); font-size: 13.5px; margin-top: 7px; }
.card ul li::before {
  content: ""; position: absolute; left: 2px; top: 9px; width: 7px; height: 7px; border-radius: 2px;
  background: var(--accent);
}

/* tinted band */
.band { background: var(--bg-alt); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); margin-top: 56px; }
.band section.block { padding-top: 56px; }

/* spec / rule table */
.spec { margin-top: 28px; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.spec table { width: 100%; border-collapse: collapse; font-size: 14px; }
.spec thead th {
  text-align: left; background: var(--bg-alt); color: var(--ink-soft); font-weight: 700;
  padding: 13px 18px; font-size: 12.5px; letter-spacing: .03em; text-transform: uppercase;
  border-bottom: 1px solid var(--line);
}
.spec tbody td { padding: 13px 18px; border-bottom: 1px solid var(--line-soft); color: var(--ink-soft); vertical-align: top; }
.spec tbody tr:last-child td { border-bottom: none; }
.spec tbody tr:hover { background: var(--accent-wash); }
.spec td .nm { font-weight: 650; color: var(--ink); }
.mono { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; font-weight: 700; color: var(--accent); white-space: nowrap; }

/* weight bars */
.weights { margin-top: 28px; display: grid; gap: 14px; }
.wrow { display: grid; grid-template-columns: 150px 1fr 58px; align-items: center; gap: 16px; }
.wrow .wname { font-weight: 650; font-size: 14px; }
.wrow .wtrack { height: 11px; background: var(--bg-tint); border-radius: 999px; overflow: hidden; }
.wrow .wfill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.wrow .wval { text-align: right; font-weight: 750; color: var(--accent); font-variant-numeric: tabular-nums; }

/* flow / steps */
.flow { margin-top: 28px; display: grid; gap: 0; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 18px; position: relative; padding-bottom: 22px; }
.step:not(:last-child)::before { content: ""; position: absolute; left: 21px; top: 40px; bottom: -2px; width: 2px; background: var(--line); }
.step .sn {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; z-index: 1;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; font-weight: 800; font-size: 16px;
  box-shadow: 0 6px 16px -6px var(--accent);
}
.step .sc h4 { font-size: 15.5px; }
.step .sc p { color: var(--muted); font-size: 14px; margin-top: 4px; }

/* pill list */
.pills { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.pill {
  font-size: 13px; font-weight: 600; color: var(--ink-soft);
  background: var(--bg); border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px;
}
.pill b { color: var(--accent); }

/* ---------------------------------------------------- Connections section */
.connections { background: var(--ink); color: #fff; position: relative; overflow: hidden; margin-top: 64px; }
.connections::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(80% 70% at 100% 0%, color-mix(in srgb, var(--accent) 40%, transparent), transparent 60%);
  opacity: .7;
}
.connections .wrap { position: relative; z-index: 2; padding: 64px 24px 70px; }
.connections .kicker { color: color-mix(in srgb, var(--accent) 75%, white); }
.connections .h2 { color: #fff; }
.connections .section-lede { color: rgba(255,255,255,.7); }
.conn-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 30px; }
.conn {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-sm); padding: 18px 20px; transition: background .18s ease, border-color .18s ease;
}
.conn:hover { background: rgba(255,255,255,.085); border-color: color-mix(in srgb, var(--accent) 55%, transparent); }
.conn .top { display: flex; align-items: center; gap: 11px; }
.conn .arrow {
  font-size: 12px; font-weight: 800; letter-spacing: .04em; color: #fff;
  background: var(--accent);
  background: color-mix(in srgb, var(--accent) 88%, white); color: var(--ink);
  padding: 3px 9px; border-radius: 7px; white-space: nowrap;
}
.conn h4 { font-size: 15.5px; color: #fff; }
.conn p { color: rgba(255,255,255,.72); font-size: 13.5px; margin-top: 8px; }

.impact-banner {
  margin-top: 30px; display: flex; flex-wrap: wrap; gap: 14px;
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius); padding: 22px 24px;
}
.impact-banner .ib { flex: 1 1 200px; }
.impact-banner .ib .n {
  font-size: 25px; font-weight: 800; letter-spacing: -0.02em;
  color: color-mix(in srgb, var(--accent) 80%, white);
}
.impact-banner .ib .t { color: rgba(255,255,255,.72); font-size: 13px; margin-top: 2px; }

/* ----------------------------------------------------------------- Footer */
.foot { background: var(--ink); color: rgba(255,255,255,.6); border-top: 1px solid rgba(255,255,255,.08); }
.foot .wrap { padding: 26px 24px; display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; align-items: center; font-size: 13px; }
.foot a { color: rgba(255,255,255,.82); font-weight: 600; }
.foot .links { display: flex; gap: 16px; flex-wrap: wrap; }

/* note callout */
.note {
  margin-top: 24px; display: flex; gap: 13px; align-items: flex-start;
  background: var(--accent-wash); border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--line));
  border-radius: var(--radius-sm); padding: 16px 18px; font-size: 13.5px; color: var(--ink-soft);
}
.note .nic { font-size: 17px; }
.note b { color: var(--accent-ink); }

/* reveal animation */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* =============================================================== Index hub */
.hub-hero { background: var(--ink); color: #fff; position: relative; overflow: hidden; }
.hub-hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(80% 70% at 85% -10%, rgba(99,102,241,.55), transparent 60%),
    radial-gradient(70% 70% at 5% 110%, rgba(13,148,136,.5), transparent 55%),
    radial-gradient(60% 60% at 50% 50%, rgba(219,39,119,.18), transparent 70%);
}
.hub-hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(120% 90% at 60% 10%, #000, transparent 78%);
}
.hub-hero .wrap { position: relative; z-index: 2; padding: 86px 24px 70px; }
.hub-hero h1 { font-size: clamp(38px, 6vw, 70px); font-weight: 850; max-width: 18ch; }
.hub-hero .lede { margin-top: 20px; font-size: clamp(16px, 1.8vw, 20px); color: rgba(255,255,255,.82); max-width: 64ch; }
.hub-stats { display: flex; flex-wrap: wrap; gap: 30px; margin-top: 34px; }
.hub-stats .hs .n { font-size: 30px; font-weight: 800; letter-spacing: -.03em; }
.hub-stats .hs .t { font-size: 13px; color: rgba(255,255,255,.66); font-weight: 600; margin-top: 2px; }

.sysgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 38px; }
.syscard {
  display: block; position: relative; overflow: hidden;
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.syscard::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, var(--c), color-mix(in srgb, var(--c) 55%, #fff));
}
.syscard:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: color-mix(in srgb, var(--c) 35%, var(--line)); }
.syscard .ic {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; font-size: 23px;
  background: color-mix(in srgb, var(--c) 12%, #fff); color: var(--c); margin-bottom: 15px;
}
.syscard .cat { font-size: 11.5px; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; color: var(--c); }
.syscard h3 { font-size: 19px; margin-top: 7px; }
.syscard p { color: var(--muted); font-size: 13.5px; margin-top: 9px; }
.syscard .go { margin-top: 15px; font-size: 13px; font-weight: 700; color: var(--c); display: inline-flex; align-items: center; gap: 6px; }
.syscard:hover .go { gap: 10px; }

.layer-label { display:flex; align-items:center; gap:14px; margin-top:46px; }
.layer-label span { font-size:12.5px; font-weight:750; letter-spacing:.12em; text-transform:uppercase; color:var(--faint); white-space:nowrap; }
.layer-label::after { content:""; height:1px; flex:1; background:var(--line); }

/* ----------------------------------------------------------- Responsive */
@media (max-width: 900px) {
  .cards.c3, .cards.c4 { grid-template-columns: repeat(2, 1fr); }
  .statstrip .grid { grid-template-columns: repeat(2, 1fr); }
  .sysgrid { grid-template-columns: repeat(2, 1fr); }
  .conn-grid { grid-template-columns: 1fr; }
  .topnav a:not(.primary) { display: none; }
}
@media (max-width: 620px) {
  .cards.c2, .cards.c3, .cards.c4 { grid-template-columns: 1fr; }
  .sysgrid { grid-template-columns: 1fr; }
  .wrow { grid-template-columns: 110px 1fr 46px; gap: 10px; }
  .hero .wrap { padding: 54px 20px 70px; }
  .statstrip .grid { grid-template-columns: 1fr 1fr; }
}

@media print {
  .topbar, .reveal { position: static; }
  .reveal { opacity: 1; transform: none; }
  .card:hover, .syscard:hover { transform: none; }
  body { background: #fff; }
}