:root {
  --color-background: #f7f8fa;
  --color-surface: #ffffff;
  --color-hover: #f0f2f5;
  --color-foreground: #0f172a;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-danger: #b91c1c;
  --color-warning: #92400e;

  --radius: 10px;
  --container-width: 720px;
  --container-padding: 20px;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-background);
  color: var(--color-foreground);
  font-family: var(--font-sans);
}

a { color: inherit; }

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  padding: 0 var(--container-padding);
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-header .container {
  padding: 16px var(--container-padding);
}

.site-main {
  flex: 1;
  padding: 20px 0;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-footer .container {
  padding: 16px var(--container-padding);
}

h1 { font-size: 1.6rem; margin: 0 0 12px 0; letter-spacing: -0.01em; }
h2 { font-size: 1.2rem; margin: 0 0 12px 0; letter-spacing: -0.01em; }

.muted { color: var(--color-muted); }

.error-message {
  color: #dc3545;
  margin-top: 8px;
}

.stealth-link { text-decoration: none; }
.stealth-link:hover { text-decoration: underline; }

.content-surface {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.surface--padded {
  padding: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
}

.btn:hover { background: var(--color-hover); }

.btn.primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.btn.primary:hover { background: var(--color-accent-hover); }

.btn:disabled,
.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-weight: 600;
}

input {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-foreground);
  font: inherit;
}

input:focus {
  outline: 2px solid color-mix(in oklab, var(--color-accent), transparent 70%);
  border-color: var(--color-accent);
}

.code-block {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 12px;
  background: var(--color-hover);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow-x: auto;
  white-space: pre;
}

.code-inline {
  font-family: var(--font-mono);
  padding: 8px 10px;
  background: var(--color-hover);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow-x: auto;
}

.error {
  border: 1px solid color-mix(in oklab, var(--color-danger), transparent 60%);
  background: color-mix(in oklab, var(--color-danger), transparent 92%);
  color: var(--color-danger);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin-bottom: 12px;
}

.warning {
  border: 1px solid color-mix(in oklab, var(--color-warning), transparent 60%);
  background: color-mix(in oklab, var(--color-warning), transparent 92%);
  color: var(--color-warning);
  border-radius: var(--radius);
  padding: 10px 12px;
}