/* Shared styles for static content pages (guides, tools, legal).
   Keeps them visually consistent with the React app's landing page. */
:root {
  color-scheme: light dark;
  --brand: #111;
  --muted: #6b7280;
  --card: #ffffff;
  --edge: #e5e7eb;
  --text: #1f2937;
  --page-bg: #f8fafc;
  --glow-1: #eef2ff;
  --glow-2: #f1f5f9;
  --panel-bg: #ffffff;
  --control-bg: #ffffff;
  --accent-bg: #111111;
  --accent-text: #ffffff;
  --danger: #b91c1c;
  --primary: #10b981;
  --max: 760px;
}
/* OS preference fallback */
@media (prefers-color-scheme: dark) {
  :root {
    --brand: #e7e9ea;
    --muted: #9ca3af;
    --card: #000000;
    --edge: #2f3336;
    --text: #e7e9ea;
    --page-bg: #000000;
    --glow-1: #16181c;
    --glow-2: #0a0a0a;
    --panel-bg: #000000;
    --control-bg: #0b0b0b;
    --accent-bg: #e7e9ea;
    --accent-text: #000000;
  }
}
/* Explicit override from site theme toggle (stored in localStorage) */
[data-theme="light"] {
  --brand: #111;
  --muted: #6b7280;
  --card: #ffffff;
  --edge: #e5e7eb;
  --text: #1f2937;
  --page-bg: #f8fafc;
  --glow-1: #eef2ff;
  --glow-2: #f1f5f9;
  --panel-bg: #ffffff;
  --control-bg: #ffffff;
  --accent-bg: #111111;
  --accent-text: #ffffff;
  color-scheme: light;
}
[data-theme="dark"] {
  --brand: #e7e9ea;
  --muted: #9ca3af;
  --card: #000000;
  --edge: #2f3336;
  --text: #e7e9ea;
  --page-bg: #000000;
  --glow-1: #16181c;
  --glow-2: #0a0a0a;
  --panel-bg: #000000;
  --control-bg: #0b0b0b;
  --accent-bg: #e7e9ea;
  --accent-text: #000000;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  background: var(--page-bg);
  color: var(--text);
  line-height: 1.6;
}
body {
  background: radial-gradient(1200px 600px at 20% -10%, var(--glow-1) 0%, transparent 50%),
              radial-gradient(800px 500px at 100% 20%, var(--glow-2) 0%, transparent 50%),
              var(--page-bg);
  min-height: 100vh;
}
.site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 20px 24px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.brand {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--brand);
  text-decoration: none;
}
.brand:hover { opacity: 0.8; }
.site-nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 14px;
}
.site-nav a {
  color: var(--muted);
  text-decoration: none;
}
.site-nav a:hover { color: var(--text); text-decoration: underline; }
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 24px 48px;
}
h1 { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 8px; color: var(--brand); }
h2 { font-size: 20px; margin: 28px 0 8px; color: var(--brand); }
h3 { font-size: 16px; margin: 20px 0 6px; }
p { margin: 0 0 14px; }
ul, ol { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 6px; }
a { color: var(--accent-bg); }
.card {
  background: var(--card);
  border: 1px solid var(--edge);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.06);
  margin-bottom: 16px;
}
.muted { color: var(--muted); font-size: 14px; }
.small { font-size: 13px; color: var(--muted); }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 14px;
  border-radius: 10px;
  border: 1px solid var(--edge);
  background: var(--control-bg);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
}
.btn--primary {
  background: var(--accent-bg);
  color: var(--accent-text);
  border-color: var(--accent-bg);
}
.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--edge);
  font-size: 13px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  justify-content: space-between;
  align-items: center;
}
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--text); text-decoration: underline; }
/* Calculator styles */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 16px;
  align-items: center;
}
.calc-grid label { font-size: 14px; }
.calc-grid input, .calc-grid select {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--edge);
  border-radius: 8px;
  background: var(--control-bg);
  color: var(--text);
  font-size: 14px;
}
.result {
  margin-top: 16px;
  padding: 16px;
  background: var(--control-bg);
  border: 1px solid var(--edge);
  border-radius: 12px;
}
.result strong { font-size: 18px; }
.disclaimer {
  margin-top: 16px;
  padding: 12px 14px;
  background: var(--control-bg);
  border: 1px dashed var(--edge);
  border-radius: 10px;
  font-size: 13px;
  color: var(--muted);
}
@media (max-width: 560px) {
  .calc-grid { grid-template-columns: 1fr; }
  h1 { font-size: 24px; }
}
.breadcrumbs { font-size: 13px; color: var(--muted); margin-bottom: 12px; }
.breadcrumbs a { color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover { text-decoration: underline; }
.guide-list { list-style: none; padding: 0; }
.guide-list li { margin-bottom: 10px; }
.guide-list a { font-weight: 600; }
.tools-group-title {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 24px 0 10px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--edge);
  color: var(--brand);
}
.tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--edge);
  color: var(--muted);
  margin-left: 6px;
}
/* Theme toggle (matches React app look) */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 8px;
  border: 1px solid var(--edge);
  border-radius: 9999px;
  background: var(--control-bg);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: box-shadow .2s ease, border-color .2s ease, background .2s ease, color .2s ease;
}
.theme-toggle:hover {
  box-shadow: 0 6px 14px rgba(0,0,0,0.08);
}
.theme-toggle__track {
  position: relative;
  width: 34px;
  height: 20px;
  border-radius: 999px;
  background: var(--muted);
  flex-shrink: 0;
  transition: background .2s ease;
}
[data-theme="dark"] .theme-toggle__track {
  background: var(--primary, #10b981);
}
.theme-toggle__knob {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  color: #6b7280;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.25);
  transition: transform .2s ease;
}
[data-theme="dark"] .theme-toggle__knob {
  transform: translateX(14px);
  color: #000000;
}
.theme-toggle__label {
  min-width: 34px;
  text-align: left;
}
.theme-toggle__knob svg {
  display: none;
}
[data-theme="light"] .theme-toggle__knob .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle__knob .icon-moon { display: block; }
/* default (before JS) show sun */
.theme-toggle__knob .icon-sun { display: block; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}