:root {
  color-scheme: dark;
  --bg: #071526;
  --panel: rgba(12, 27, 43, 0.78);
  --panel-strong: rgba(18, 39, 60, 0.92);
  --line: rgba(186, 224, 255, 0.18);
  --line-strong: rgba(228, 243, 255, 0.34);
  --text: #f2f8ff;
  --muted: #a8bfd2;
  --blue: #8fd0ff;
  --green: #a6f4a9;
  --gold: #ffd98b;
  --shadow: rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

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

body {
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, rgba(143, 208, 255, 0.22), transparent 28rem),
    radial-gradient(circle at 84% 10%, rgba(255, 217, 139, 0.16), transparent 26rem),
    linear-gradient(160deg, #071526 0%, #0d2338 52%, #071018 100%);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.75), transparent 86%);
}

.chunk-shell {
  position: relative;
  width: min(1380px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.hero-card,
.viewport-card,
.notes-grid article,
.log-card {
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(18, 39, 60, 0.86), rgba(8, 18, 30, 0.72));
  box-shadow: 0 28px 90px var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(18px);
}

.hero-card {
  overflow: hidden;
  border-radius: 32px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 22px 0;
}

.brand {
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 24px;
  padding: 22px;
}

.hero-copy {
  min-height: 320px;
  padding: 38px;
  border-radius: 26px;
  background:
    linear-gradient(135deg, rgba(143, 208, 255, 0.18), transparent 42%),
    radial-gradient(circle at 100% 0%, rgba(166, 244, 169, 0.18), transparent 22rem),
    rgba(255, 255, 255, 0.035);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 18px;
  font-size: clamp(2.35rem, 6vw, 5.6rem);
  line-height: 0.92;
  letter-spacing: -0.07em;
}

h2 {
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  letter-spacing: -0.02em;
}

p {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

button,
.language-trigger,
.language-option {
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  font: inherit;
}

button {
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 800;
}

button:hover,
.language-trigger:hover,
.language-option:hover {
  background: rgba(255, 255, 255, 0.14);
}

.status-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.status-grid article {
  min-height: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.045);
}

.status-grid span,
.viewport-caption span,
.log-card h2 {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.status-grid strong {
  display: block;
  margin-top: 8px;
  color: var(--text);
  font-size: clamp(1rem, 2vw, 1.35rem);
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.viewport-card {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  margin-top: 20px;
  border-radius: 32px;
}

#engineCanvas {
  display: block;
  width: 100%;
  height: min(68vh, 680px);
  min-height: 460px;
}

.viewport-caption {
  position: absolute;
  left: 20px;
  bottom: 20px;
  display: grid;
  gap: 6px;
  max-width: min(520px, calc(100% - 40px));
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(6, 16, 27, 0.58);
  backdrop-filter: blur(14px);
}

.viewport-caption strong {
  font-size: 1.1rem;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.notes-grid article,
.log-card {
  padding: 22px;
  border-radius: 24px;
}

.log-card {
  margin-top: 20px;
}

#engineLog {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.language-picker {
  position: relative;
  z-index: 5;
}

.language-trigger {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
}

.language-caret {
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  opacity: 0.7;
}

.language-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  display: none;
  width: min(280px, calc(100vw - 40px));
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(7, 18, 31, 0.96);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

.language-picker.open .language-menu {
  display: grid;
  gap: 4px;
}

.language-option {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 10px;
  width: 100%;
  padding: 10px 12px;
  border: 0;
  border-radius: 12px;
  text-align: left;
}

.language-option.active {
  color: #062130;
  background: var(--blue);
}

.language-option-native,
.language-option-status {
  color: currentColor;
  font-size: 0.78rem;
  opacity: 0.72;
}

@media (max-width: 900px) {
  .chunk-shell {
    width: min(100vw - 16px, 720px);
    padding-top: 8px;
  }

  .hero-card,
  .viewport-card {
    border-radius: 24px;
  }

  .topbar,
  .hero-grid {
    padding: 14px;
  }

  .hero-grid,
  .notes-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    min-height: 0;
    padding: 24px;
  }

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

  #engineCanvas {
    height: 58vh;
    min-height: 360px;
  }
}

@media (max-width: 520px) {
  .topbar {
    align-items: flex-start;
  }

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

  .hero-actions button {
    flex: 1 1 100%;
  }
}

.route-pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.06);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: #062130;
  background: var(--blue);
  font-weight: 900;
  text-decoration: none;
}

.action-link.secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

code {
  padding: 0.08em 0.34em;
  border: 1px solid var(--line);
  border-radius: 0.45em;
  color: var(--gold);
  background: rgba(0, 0, 0, 0.18);
}