/* SleepSync Styles */
:root {
--bg: #f8f9fa;
--card: #ffffff;
--text: #212529;
--accent: #4a6fa5;
--accent-light: #6b8cbc;
--border: #dee2e6;
--success: #28a745;
--warning: #ffc107;
--radius: 8px;
--shadow: 0 2px 8px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }

header { background: var(--accent); color: white; padding: 1.5rem; text-align: center; }
header h1 { margin: 0 0 0.25rem; font-size: 2rem; }
header .tagline { margin: 0; opacity: 0.9; }
header nav { margin-top: 0.5rem; }
header nav a { color: white; text-decoration: underline; }

main { max-width: 900px; margin: 0 auto; padding: 1rem; }

section { background: var(--card); margin: 1rem 0; padding: 1.5rem; border-radius: var(--radius); box-shadow: var(--shadow); }
section h2 { margin-top: 0; color: var(--accent); border-bottom: 2px solid var(--border); padding-bottom: 0.5rem; }

.input-group { margin: 1rem 0; }
.input-group label { display: block; margin-bottom: 0.25rem; font-weight: 500; }
.input-group input, .input-group select { width: 100%; padding: 0.5rem; border: 1px solid var(--border); border-radius: 4px; font-size: 1rem; }

button { background: var(--accent); color: white; border: none; padding: 0.75rem 1.5rem; border-radius: 4px; cursor: pointer; font-size: 1rem; margin: 0.5rem 0; }
button:hover { background: var(--accent-light); }
button.secondary { background: var(--border); color: var(--text); }

.results { margin-top: 1rem; }
.window-card { background: var(--bg); padding: 1rem; margin: 0.5rem 0; border-radius: 4px; border-left: 4px solid var(--success); }
.window-card .time { font-size: 1.25rem; font-weight: bold; }
.window-card .cycles { color: #666; font-size: 0.9rem; }

.chart-container { height: 120px; background: linear-gradient(to right, #e3f2fd, #bbdefb, #90caf9); border-radius: 4px; position: relative; overflow: hidden; margin: 1rem 0; }
.chart-marker { position: absolute; top: 5px; width: 2px; height: 110px; background: var(--accent); }n.chart-label { position: absolute; bottom: 5px; font-size: 0.75rem; text-align: center; width: 40px; }

.routine-list { list-style: none; padding: 0; }
.routine-list li { padding: 0.5rem 0; border-bottom: 1px solid var(--border); }
.routine-list li:last-child { border-bottom: none; }

troubleshooting dl { margin: 0; }
troubleshooting dt { font-weight: bold; margin-top: 0.75rem; }
troubleshooting dd { margin-left: 0; margin-bottom: 0.5rem; }

.hidden { display: none; }
.empty-state { color: #666; font-style: italic; text-align: center; padding: 1rem; }

footer { text-align: center; padding: 1.5rem; color: #666; font-size: 0.9rem; }
footer a { color: var(--accent); }

@media (max-width: 600px) {
header h1 { font-size: 1.5rem; }
main { padding: 0.5rem; }
section { padding: 1rem; }
}

@media (min-width: 768px) {
.calculator-section { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.nap-section { display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: end; }
}


/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}