:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-subtle: #f8fafc;
  --surface-muted: #f3f4f6;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --text: #1e293b;
  --text-strong: #0f172a;
  --muted: #475569;
  --brand: #2563eb;
  --brand-soft: #eff6ff;
  --success-soft: #ecfdf5;
  --warning-soft: #fffbeb;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --mono: "IBM Plex Mono", "SFMono-Regular", "Consolas", monospace;
  --sans:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
}

a {
  color: inherit;
}

button,
select {
  font: inherit;
}

code {
  font-family: var(--mono);
}

.page-shell {
  width: min(80rem, calc(100vw - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

.hero {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 32px;
}

.hero h1 {
  margin: 0 0 12px;
  color: var(--text-strong);
  font-size: clamp(2.5rem, 4.2vw, 3.8rem);
  font-weight: 800;
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.hero p {
  margin: 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  text-decoration: none;
  font-size: 0.95rem;
}

.meta-chip strong {
  color: var(--text-strong);
  font-weight: 700;
}

.layout-grid {
  display: grid;
  grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel-content {
  padding: 22px;
}

.panel h2,
.panel h3 {
  margin: 0 0 10px;
  color: var(--text-strong);
}

.panel h2 {
  font-size: 1.2rem;
  font-weight: 700;
}

.panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.selector-stack {
  display: grid;
  gap: 18px;
}

.field-label {
  display: block;
  margin-bottom: 8px;
  color: var(--text-strong);
  font-size: 0.92rem;
  font-weight: 700;
}

.select-wrap {
  position: relative;
}

.select-wrap select {
  width: 100%;
  appearance: none;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text-strong);
  padding: 12px 40px 12px 14px;
}

.select-wrap::after {
  content: "▾";
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  color: var(--muted);
  pointer-events: none;
}

.selector-note {
  margin-top: 14px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-subtle);
  font-size: 0.95rem;
}

.selector-note strong {
  display: block;
  margin-bottom: 6px;
  color: var(--text-strong);
}

.status-note {
  margin-top: 18px;
  padding: 12px 14px;
  border: 1px solid #fcd34d;
  border-radius: var(--radius-md);
  background: var(--warning-soft);
  color: #92400e;
  font-size: 0.92rem;
}

.instruction-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 16px;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.instruction-header h2 {
  margin-bottom: 8px;
  font-size: 1.2rem;
}

.instruction-header p {
  max-width: 36rem;
}

.install-list {
  display: grid;
  gap: 18px;
}

.install-card {
  padding: 0;
}

.install-card + .install-card {
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.install-card h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
  font-weight: 700;
}

.install-card p {
  margin-bottom: 16px;
}

.command-grid {
  display: grid;
  gap: 14px;
}

.command-card {
  overflow: hidden;
  border: 1px solid #27272a;
  border-radius: var(--radius-md);
  background: #18181b;
  color: #fafafa;
}

.command-card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid #3f3f46;
  background: #27272a;
}

.command-card header strong {
  font-size: 0.95rem;
  font-weight: 700;
}

.copy-button {
  border: 1px solid #52525b;
  border-radius: 999px;
  background: #3f3f46;
  color: #fafafa;
  padding: 8px 12px;
  cursor: pointer;
  transition: background 140ms ease, border-color 140ms ease;
}

.copy-button:hover,
.copy-button:focus-visible {
  background: #52525b;
  border-color: #71717a;
}

.command-card pre {
  margin: 0;
  padding: 16px;
  overflow-x: hidden;
}

.command-card code {
  font-size: 0.92rem;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.empty-state {
  padding: 18px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface-subtle);
  color: var(--muted);
}

@media (max-width: 920px) {
  .layout-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100vw - 20px, 80rem);
    padding-top: 24px;
    padding-bottom: 32px;
  }

  .hero,
  .panel-content,
  .install-card {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero h1 {
    max-width: none;
    font-size: 2.8rem;
  }

  .instruction-header,
  .command-card header {
    flex-direction: column;
    align-items: flex-start;
  }
}