:root {
  --bg: #eef2f6;
  --panel: #ffffff;
  --line: #d7deea;
  --line-strong: #bac6d9;
  --ink: #142031;
  --muted: #607084;
  --accent: #2d74ff;
  --accent-dark: #184aa8;
  --dark: #0d1421;
  --dark-2: #121c2d;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background:
    linear-gradient(180deg, #0c1320 0, #182337 420px, var(--bg) 740px, var(--bg) 100%);
  color: var(--ink);
  font-family: "Inter", sans-serif;
}

.system {
  max-width: 1220px;
  margin: 0 auto;
  padding: 24px 24px 56px;
}

.system-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
}

.identity {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
}

.dark-identity {
  color: var(--ink);
}

.identity-mark {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  font-family: "Chakra Petch", sans-serif;
  font-weight: 700;
}

.identity-name,
.dark-name,
.system-nav a,
.primary-control,
.secondary-control,
.download-action,
.signal-links a,
.doc-link {
  font-family: "Chakra Petch", sans-serif;
}

.identity-name,
.dark-name {
  font-size: 1rem;
  font-weight: 700;
}

.system-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.system-nav a,
.signal-links a,
.doc-link {
  color: rgba(255, 255, 255, 0.84);
  text-decoration: none;
  font-size: 0.92rem;
}

.dark-name,
.doc-link {
  color: var(--accent-dark);
}

.signal-links a {
  color: var(--accent-dark);
}

.system-hero,
.module-board,
.matrix,
.signal-bar,
.doc-card {
  margin-top: 24px;
}

.system-hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
}

.hero-panel,
.runtime-panel,
.module-card,
.matrix-list,
.signal-bar,
.doc-card {
  border: 1px solid var(--line);
}

.hero-panel {
  padding: 26px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.02) 100%);
  border-color: rgba(255, 255, 255, 0.08);
}

.hero-label,
.board-label {
  margin: 0 0 12px;
  color: #8eb3ff;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 700;
}

h1,
h2,
h3,
p,
small {
  margin: 0;
}

h1,
h2,
h3 {
  font-family: "Chakra Petch", sans-serif;
}

h1 {
  max-width: 760px;
  color: #fff;
  font-size: clamp(2.8rem, 5vw, 4.8rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.hero-text,
.module-card p,
.matrix-row p,
.signal-copy p,
.doc-lead,
.doc-block p,
.runtime-chip,
.runtime-head strong,
.runtime-cell small {
  color: var(--muted);
  line-height: 1.72;
}

.hero-text {
  max-width: 700px;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.76);
}

.hero-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 26px;
}

.primary-control,
.secondary-control,
.download-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 18px;
  text-decoration: none;
  font-weight: 700;
}

.primary-control,
.download-action {
  background: var(--accent);
  color: #fff;
}

.secondary-control {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.runtime-panel {
  padding: 22px;
  background: var(--panel);
}

.runtime-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  margin-bottom: 18px;
}

.runtime-chip {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.76rem;
  font-weight: 700;
}

.runtime-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.runtime-cell {
  padding: 16px;
  background: #f7faff;
  border: 1px solid var(--line);
}

.runtime-cell small {
  display: block;
  margin-bottom: 8px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.runtime-cell strong,
.matrix-row strong,
.doc-block h2 {
  font-family: "Chakra Petch", sans-serif;
}

.full-line {
  grid-column: 1 / -1;
}

.download-action {
  width: 100%;
  margin-top: 16px;
}

.module-board {
  padding: 22px;
  background: var(--panel);
}

.board-head,
.matrix-head {
  margin-bottom: 18px;
}

.board-head h2,
.matrix-head h2,
.signal-copy h2,
.doc-card h1 {
  font-size: 2rem;
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.module-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 0.9fr;
  gap: 16px;
}

.module-card {
  padding: 22px;
  background: #fff;
}

.major {
  grid-row: span 2;
  background: linear-gradient(180deg, #ffffff 0%, #f1f6ff 100%);
}

.module-card h3 {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.matrix-list {
  background: #fff;
}

.matrix-row {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.matrix-row:last-child {
  border-bottom: 0;
}

.matrix-row strong {
  padding-left: 18px;
}

.matrix-row p {
  padding-right: 18px;
}

.signal-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 24px;
  background: #fff;
}

.signal-links {
  display: grid;
  gap: 10px;
  min-width: 280px;
}

.doc-system {
  max-width: 1020px;
}

.doc-main {
  padding-top: 24px;
}

.doc-card {
  padding: 32px;
  background: #fff;
}

.doc-lead {
  margin-top: 14px;
  margin-bottom: 22px;
}

.doc-block + .doc-block {
  margin-top: 22px;
}

.doc-block h2 {
  margin-bottom: 10px;
  font-size: 1.04rem;
}

@media (max-width: 980px) {
  .system-hero,
  .module-grid,
  .matrix-row,
  .signal-bar {
    grid-template-columns: 1fr;
  }

  .major {
    grid-row: auto;
  }
}

@media (max-width: 720px) {
  .system {
    padding: 16px 16px 36px;
  }

  .system-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-controls {
    flex-direction: column;
    align-items: flex-start;
  }

  .runtime-grid {
    grid-template-columns: 1fr;
  }
}