:root {
  color-scheme: dark;
  --bg: #0d1118;
  --panel: #151b26;
  --panel-strong: #1d2633;
  --text: #f3f7fb;
  --muted: #b7c2cf;
  --subtle: #8290a3;
  --line: #2b3545;
  --primary: #5865f2;
  --primary-strong: #7682ff;
  --green: #41c28a;
  --amber: #f0b15f;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.28);
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(88, 101, 242, 0.24), transparent 32rem),
    linear-gradient(180deg, #101622 0%, var(--bg) 34rem);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem clamp(1rem, 4vw, 4rem);
  background: rgba(13, 17, 24, 0.88);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
}

.brand,
.nav-links,
.hero-actions,
.support-actions {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.75rem;
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: 0.55rem;
  background: var(--primary);
  color: white;
  font-size: 0.82rem;
}

.nav-links {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem 1rem;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.94rem;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

.hero-section,
.section,
.site-footer {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
  min-height: calc(100vh - 4.5rem);
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.hero-copy h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(3.25rem, 7vw, 5.8rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 66ch;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: 1.12rem;
}

.section-kicker {
  margin: 0 0 0.8rem;
  color: var(--green);
  font-weight: 800;
}

.hero-actions,
.support-actions {
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.78rem 1rem;
  border: 1px solid transparent;
  border-radius: 0.55rem;
  font-weight: 800;
  text-decoration: none;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button:focus-visible,
.nav-links a:focus-visible,
.brand:focus-visible {
  outline: 3px solid rgba(118, 130, 255, 0.55);
  outline-offset: 3px;
}

.primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 16px 32px rgba(88, 101, 242, 0.24);
}

.primary:hover,
.primary:focus-visible {
  background: var(--primary-strong);
}

.secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.secondary:hover,
.secondary:focus-visible {
  border-color: var(--primary-strong);
  background: rgba(118, 130, 255, 0.1);
}

.system-panel,
.feature-card,
.command-group {
  border-radius: 0.75rem;
  background: rgba(21, 27, 38, 0.88);
  box-shadow: var(--shadow);
}

.system-panel {
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.panel-topline {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--amber);
  font-weight: 800;
}

dl {
  display: grid;
  gap: 0.75rem;
  margin: 0;
}

dl div {
  padding: 0.9rem;
  border-radius: 0.55rem;
  background: var(--panel-strong);
}

dt {
  color: var(--subtle);
  font-size: 0.86rem;
}

dd {
  margin: 0.25rem 0 0;
  font-weight: 750;
}

.section {
  padding: clamp(3rem, 6vw, 5.5rem) 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2rem;
}

.section h2 {
  max-width: 15ch;
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1;
}

.section-heading p:not(.section-kicker),
.split-section p,
.support-section p {
  max-width: 70ch;
  color: var(--muted);
}

.feature-grid,
.command-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card,
.command-group {
  display: flex;
  min-height: 17rem;
  flex-direction: column;
  justify-content: space-between;
  padding: 1.1rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-card h3,
.command-group h3 {
  margin: 0 0 0.65rem;
  font-size: 1.1rem;
}

.feature-card p,
.command-group p {
  margin: 0;
  color: var(--muted);
}

.feature-card ul,
.safety-list {
  margin: 1.1rem 0 0;
  padding-left: 1.1rem;
  color: var(--subtle);
}

.split-section,
.dashboard-band,
.support-section {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: start;
  border-top: 1px solid var(--line);
}

.timeline-list {
  display: grid;
  gap: 0.75rem;
}

.timeline-list span,
.fine-print {
  border-radius: 0.55rem;
  background: var(--panel);
  color: var(--muted);
}

.timeline-list span {
  padding: 0.95rem 1rem;
  border-left: 1px solid var(--primary-strong);
}

.command-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
}

.command-list span {
  padding: 0.35rem 0.55rem;
  border-radius: 0.45rem;
  background: rgba(88, 101, 242, 0.14);
  color: #dce1ff;
  font-size: 0.9rem;
  font-weight: 700;
}

.fine-print {
  margin: 1rem 0 0;
  padding: 0.95rem 1rem;
}

.dashboard-band {
  align-items: center;
}

.safety-list {
  margin-top: 0;
  color: var(--text);
}

.safety-list li + li {
  margin-top: 0.6rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--subtle);
}

@media (max-width: 860px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-section,
  .split-section,
  .dashboard-band,
  .support-section {
    grid-template-columns: 1fr;
  }

  .hero-section {
    min-height: auto;
  }

  .hero-copy h1 {
    max-width: 10ch;
  }

  .feature-grid,
  .command-grid {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .command-group {
    min-height: auto;
  }
}