:root {
  --bg: #e8efe7;
  --paper: #f7f3ea;
  --surface: #ffffff;
  --surface-2: #eef3ef;
  --ink: #1c2b24;
  --muted: #617368;
  --line: #ced8d1;
  --accent: #1e6a50;
  --accent-2: #2e87b7;
  --danger: #b54b44;
  --warn: #ad7b22;
  --shadow: 0 18px 40px rgba(24, 39, 32, 0.10);
  --radius: 18px;
  --radius-sm: 12px;
  --mono: "IBM Plex Mono", "SFMono-Regular", ui-monospace, monospace;
  --sans: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

[data-theme="dark"] {
  --bg: #0d1412;
  --paper: #15201c;
  --surface: #17221d;
  --surface-2: #22302a;
  --ink: #eef7f1;
  --muted: #9db4a8;
  --line: #31443c;
  --accent: #4cb789;
  --accent-2: #61b2de;
  --danger: #dd7168;
  --warn: #d2a24d;
  --shadow: 0 22px 50px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(46, 135, 183, 0.12), transparent 28%),
    linear-gradient(180deg, #eef4ed 0%, var(--bg) 100%);
  color: var(--ink);
  font-family: var(--sans);
}

button, input, select { font: inherit; }
a { color: inherit; }

.shell {
  max-width: 1400px;
  margin: 0 auto;
  padding: 28px 20px 48px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 24px;
  padding: 28px;
  border-radius: 28px;
  background:
    linear-gradient(135deg, rgba(30, 106, 80, 0.12), rgba(46, 135, 183, 0.10)),
    var(--surface);
  box-shadow: var(--shadow);
}

.hero.hero-product {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 26px;
}

.hero.hero-product::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -120px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 106, 80, 0.22), transparent 70%);
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 12px;
  font-family: var(--mono);
}

.eyebrow-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 10px;
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 0.98;
}
h2 { margin-bottom: 0; font-size: 22px; }

.subhead, .muted, .meta { color: var(--muted); }
.feature-lead {
  font-size: 18px;
  line-height: 1.65;
  max-width: 62ch;
}

.hero-actions, .badge-row, .button-row, .field-grid, .nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.field-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.button {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  padding: 11px 15px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}
.button:hover { transform: translateY(-1px); border-color: var(--accent-2); }
.button-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.button-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.button-secondary { background: var(--accent-2); color: #fff; border-color: var(--accent-2); }
.button.theme-toggle { background: rgba(255,255,255,0.55); backdrop-filter: blur(8px); }
.button:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.panel {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(206, 216, 209, 0.8);
  border-radius: 24px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.tabbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px;
  margin-bottom: 18px;
}

.tab-button {
  display: inline-block;
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink);
  border-radius: 999px;
  padding: 10px 16px;
  cursor: pointer;
}
.tab-button.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.banner-stack { display: grid; gap: 12px; margin-bottom: 18px; }
.banner {
  border-radius: 18px;
  padding: 14px 18px;
  box-shadow: var(--shadow);
}
.banner strong, .banner p { margin: 0; }
.banner p { margin-top: 6px; color: inherit; }
.banner-info { background: #e8f3fb; color: #17364d; }
.banner-warn { background: #fff3de; color: #684200; }
.banner-danger { background: #fbeceb; color: #5f221d; }

.stack, .zone-card, .schedule-card, .network-card { display: grid; gap: 14px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.card, .zone-card, .schedule-card, .network-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 16px;
}
.tone-ink {
  background: linear-gradient(180deg, #20312b 0%, #15211d 100%);
  color: #edf8f0;
  border-color: transparent;
}
.overview-card { min-height: 120px; }
.overview-card .value { font-size: 28px; line-height: 1; margin: 10px 0 8px; }
.mini-label {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  font-family: var(--mono);
}

.hero-stat-row,
.mock-zone-grid,
.trust-grid,
.audience-grid {
  display: grid;
  gap: 14px;
}

.hero-stat-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.stat-tile {
  padding: 16px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.68);
  border: 1px solid rgba(206, 216, 209, 0.92);
}

.stat-tile strong {
  display: block;
  margin-bottom: 6px;
  font-size: 24px;
}

.hero-device {
  display: grid;
  gap: 14px;
}

.device-shell {
  border-radius: 28px;
  padding: 18px;
  background: linear-gradient(180deg, rgba(21, 33, 29, 0.96), rgba(14, 22, 19, 0.98));
  color: #edf8f0;
  box-shadow: 0 24px 50px rgba(16, 24, 21, 0.34);
}

.device-screen {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(239, 244, 238, 0.95), rgba(223, 232, 224, 0.92));
  color: #21302a;
}

.device-head,
.timeline-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.timeline {
  display: grid;
  gap: 10px;
}

.timeline-item {
  padding: 12px 14px;
  border-radius: 14px;
  background: #ffffff;
  border: 1px solid #d4ddd7;
}

.timeline-time {
  font-family: var(--mono);
  color: var(--accent);
  white-space: nowrap;
}

.mock-zone-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mock-zone,
.trust-card,
.audience-card {
  padding: 16px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.mock-zone strong,
.audience-card strong {
  display: block;
  margin-bottom: 4px;
}

.audience-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.trust-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.cta-band {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  padding: 22px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(30, 106, 80, 0.12), rgba(46, 135, 183, 0.14)), var(--surface);
  border: 1px solid var(--line);
}

.field { display: grid; gap: 6px; }
.field label {
  font-size: 13px;
  color: var(--muted);
  font-family: var(--mono);
}
input[type="text"], input[type="number"], select {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--surface-2);
  color: var(--ink);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}
.readout {
  min-height: 44px;
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--line);
}
.input-suffix {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: stretch;
}
.input-suffix span {
  display: flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-left: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: #e3ebe5;
  font-family: var(--mono);
  color: var(--muted);
  font-size: 12px;
}
.input-suffix input { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: #edf4ef;
  border: 1px solid #d9e4dc;
  color: var(--ink);
  font-size: 12px;
  font-family: var(--mono);
}
.badge.badge-blue { background: #e8f3fb; border-color: #cfe4f2; }
.badge.badge-red { background: #fbeceb; border-color: #f1cfcb; }
.badge.badge-gold { background: #fff3de; border-color: #efd7a6; }

.empty-state {
  padding: 22px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

.state-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 18px;
}
.chart-panel { min-height: 100%; }
.metric-chart { display: grid; gap: 10px; }
.metric-row { display: grid; gap: 8px; }
.metric-head { display: flex; justify-content: space-between; gap: 12px; }
.metric-track {
  height: 10px;
  border-radius: 999px;
  background: #dde7df;
  overflow: hidden;
}
.metric-fill { height: 100%; border-radius: 999px; }
.metric-fill-0 { background: #7f988a; }
.metric-fill-1 { background: #2e87b7; }
.metric-fill-2 { background: #1e6a50; }
.metric-fill-3 { background: #ad7b22; }

.zone-head, .schedule-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: flex-start;
}

.hidden { display: none !important; }
.tiny { font-size: 12px; color: var(--muted); font-family: var(--mono); }

@media (max-width: 900px) {
  .hero, .state-layout { grid-template-columns: 1fr; display: grid; }
  .hero.hero-product,
  .hero-stat-row,
  .audience-grid,
  .trust-grid,
  .mock-zone-grid {
    grid-template-columns: 1fr;
  }
  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }
}