:root {
  color-scheme: dark;
  --bg: #050509;
  --panel: #101018;
  --accent: #f5d36b;
  --accent-soft: rgba(245, 211, 107, 0.12);
  --text: #f8f5f0;
  --muted: #b3a9a0;
  --border: #262638;
  --danger: #ff6b81;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--sans);
  background: radial-gradient(circle at top left, #151526 0, #050509 40%);
  color: var(--text);
}

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.brand {
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--muted);
}

.brand span {
  color: var(--accent);
}

nav a {
  margin-left: 1rem;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--muted);
}

nav a:hover {
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 2fr);
  gap: 2.5rem;
  align-items: center;
  margin-bottom: 3rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 3vw, 3rem);
  margin: 0 0 0.75rem;
  line-height: 1.03;
}

.hero h1 span {
  color: var(--accent);
}

.hero p.lead {
  margin: 0 0 1.5rem;
  color: var(--muted);
  max-width: 36rem;
  font-size: 0.98rem;
  line-height: 1.6;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  border-radius: 999px;
  padding: 0.6rem 1.3rem;
  border: 1px solid transparent;
  font-size: 0.9rem;
  cursor: pointer;
  background: transparent;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #f9b347);
  color: #241800;
  font-weight: 600;
  box-shadow: 0 0 20px rgba(245, 211, 107, 0.35);
}

.btn-outline {
  border-color: var(--border);
  background: rgba(15, 15, 28, 0.9);
  text-decoration: none;
}

.btn-outline:hover {
  border-color: var(--accent-soft);
  background: rgba(20, 20, 40, 0.95);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: radial-gradient(circle at top left, var(--accent-soft), transparent 60%);
  color: var(--muted);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.9rem;
}

.chip span {
  color: var(--accent);
}

.hero-panel {
  background: radial-gradient(circle at top, rgba(245, 211, 107, 0.12), transparent 60%),
    linear-gradient(180deg, #151522, #060611);
  border-radius: 1.5rem;
  padding: 1.2rem 1.2rem 1.1rem;
  border: 1px solid var(--border);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.7);
}

.hero-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
  font-size: 0.8rem;
  color: var(--muted);
}

.hero-panel-header span {
  color: var(--accent);
}

.hero-panel-body {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: rgba(3, 3, 10, 0.9);
  border-radius: 0.9rem;
  padding: 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  max-height: 260px;
  overflow: auto;
  white-space: pre;
}

section {
  margin-bottom: 3rem;
}

section h2 {
  font-size: 1.3rem;
  margin-bottom: 0.4rem;
}

section p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 52rem;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 2.1fr);
  gap: 2rem;
  align-items: flex-start;
}

.card {
  background: linear-gradient(135deg, rgba(18, 18, 30, 0.96), rgba(6, 6, 13, 0.98));
  border-radius: 1.1rem;
  border: 1px solid var(--border);
  padding: 1rem 1.1rem;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.55);
}

.card h3 {
  font-size: 1.05rem;
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.9rem;
  margin-top: 0;
}

.playground-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.6fr);
  gap: 1.5rem;
  margin-top: 1rem;
}

textarea {
  width: 100%;
  min-height: 220px;
  resize: vertical;
  border-radius: 0.9rem;
  border: 1px solid var(--border);
  background: #05050d;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.7rem 0.8rem;
}

.playground-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  margin-top: 0.7rem;
}

.mode-toggle {
  display: inline-flex;
  border-radius: 999px;
  border: 1px solid var(--border);
  overflow: hidden;
}

.mode-toggle button {
  background: transparent;
  border: none;
  padding: 0.35rem 0.9rem;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--muted);
}

.mode-toggle button.active {
  background: var(--accent-soft);
  color: var(--accent);
}

.output-panel {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: #05050d;
  border-radius: 0.9rem;
  border: 1px solid var(--border);
  padding: 0.75rem 0.8rem;
  min-height: 220px;
  overflow: auto;
  white-space: pre-wrap;
}

.output-panel strong {
  color: var(--accent);
}

.status-text {
  font-size: 0.78rem;
  color: var(--muted);
}

footer {
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  padding-top: 1rem;
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

footer a {
  color: var(--muted);
  text-decoration: none;
}

footer a:hover {
  color: var(--accent);
}

@media (max-width: 880px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-panel {
    order: -1;
  }

  .section-grid,
  .playground-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}