:root {
  --bg: #0b1020;
  --bg-elevated: #141a2e;
  --bg-card: #1a2140;
  --border: #2a3358;
  --text: #e8ecf5;
  --text-dim: #9aa3bd;
  --accent: #7c9eff;
  --accent-hover: #9bb4ff;
  --accent-soft: rgba(124, 158, 255, 0.12);
  --good: #5ee3a1;
  --warn: #ffb86b;
  --bad: #ff7a90;
  --radius: 14px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 20% 10%, rgba(124, 158, 255, 0.08), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(166, 124, 255, 0.06), transparent 40%);
  background-attachment: fixed;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 16, 32, 0.6);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
}

.logo-icon { font-size: 22px; }

/* Hero */
.hero {
  padding: 56px 20px 32px;
  text-align: center;
}

h1 {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  background: linear-gradient(135deg, #fff, #b8c5f0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lead {
  color: var(--text-dim);
  font-size: 17px;
  max-width: 520px;
  margin: 0 auto 36px;
}

/* Calculator */
.calculator {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  text-align: left;
}

.mode-toggle {
  display: flex;
  background: var(--bg-elevated);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 24px;
  gap: 4px;
}

.mode-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.2s ease;
  font-family: inherit;
}

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

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

.input-block label {
  display: block;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 8px;
  font-weight: 500;
}

.input-block input[type="time"] {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 28px;
  font-weight: 600;
  padding: 14px 16px;
  border-radius: 10px;
  font-family: inherit;
  margin-bottom: 16px;
  color-scheme: dark;
  text-align: center;
}

.input-block input[type="time"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.now-text {
  color: var(--text-dim);
  margin-bottom: 18px;
  font-size: 15px;
}

.calc-btn {
  width: 100%;
  background: var(--accent);
  color: #0b1020;
  border: none;
  padding: 14px 20px;
  font-size: 16px;
  font-weight: 700;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
  font-family: inherit;
}

.calc-btn:hover { background: var(--accent-hover); }
.calc-btn:active { transform: scale(0.98); }

.hidden { display: none; }

/* Results */
.results {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.results h2 {
  font-size: 18px;
  margin-bottom: 6px;
}

.results-sub {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 18px;
}

.times-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.time-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
  transition: transform 0.15s ease, border-color 0.2s ease;
}

.time-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.time-card.recommended {
  border-color: var(--good);
  background: linear-gradient(135deg, rgba(94, 227, 161, 0.08), var(--bg-elevated));
}

.time-card .time {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.time-card .cycles {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
}

.time-card .label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 6px;
  padding: 2px 8px;
  border-radius: 4px;
}

.label.good { color: var(--good); background: rgba(94, 227, 161, 0.12); }
.label.ok { color: var(--warn); background: rgba(255, 184, 107, 0.12); }
.label.short { color: var(--bad); background: rgba(255, 122, 144, 0.12); }

.fall-asleep-note {
  font-size: 13px;
  color: var(--text-dim);
  text-align: center;
  margin-top: 4px;
}

/* Content sections */
.content {
  padding: 48px 20px;
}

.content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 36px 0 14px;
  letter-spacing: -0.01em;
}

.content h2:first-child { margin-top: 0; }

.content p { color: #c5cce0; margin-bottom: 14px; }

.cycle-list, .tips-list {
  list-style: none;
  padding: 0;
}

.cycle-list li, .tips-list li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  margin-bottom: 10px;
  color: #c5cce0;
}

.faq h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 20px 0 6px;
  color: var(--text);
}

.faq p { color: var(--text-dim); }

/* Ads */
.ad-slot {
  margin: 24px auto;
  text-align: center;
  min-height: 90px;
  max-width: 728px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ad-placeholder {
  display: block;
  width: 100%;
  background: var(--bg-elevated);
  border: 1px dashed var(--border);
  color: var(--text-dim);
  font-size: 13px;
  padding: 36px 20px;
  border-radius: 8px;
}

.ad-inline { min-height: 250px; }

/* Subpage article */
.article {
  padding: 56px 20px 32px;
  max-width: 720px;
}

.article h1 {
  font-size: clamp(28px, 4.5vw, 38px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  background: linear-gradient(135deg, #fff, #b8c5f0);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.article h2 {
  font-size: 20px;
  font-weight: 700;
  margin: 32px 0 12px;
  letter-spacing: -0.01em;
}

.article p, .article li {
  color: #c5cce0;
  margin-bottom: 12px;
}

.article ul {
  list-style: disc;
  padding-left: 22px;
  margin-bottom: 14px;
}

.article a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: rgba(124, 158, 255, 0.4);
  text-underline-offset: 3px;
}

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

.article .meta {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 24px;
}

/* Bedtime table on /sleep/wake-at-*/ pages */
.bedtime-table {
  display: grid;
  gap: 10px;
  margin: 24px 0 8px;
}

.bedtime-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  gap: 12px;
}

.bedtime-row.recommended {
  border-color: var(--good);
  background: linear-gradient(135deg, rgba(94, 227, 161, 0.06), var(--bg-card));
}

.bedtime-time {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
  white-space: nowrap;
}

.bedtime-meta {
  color: var(--text-dim);
  font-size: 14px;
  text-align: right;
  line-height: 1.4;
}

.bedtime-meta strong { color: var(--text); }

.quality {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: 4px;
  margin-left: 4px;
}
.quality.good { color: var(--good); background: rgba(94, 227, 161, 0.12); }
.quality.ok { color: var(--warn); background: rgba(255, 184, 107, 0.12); }
.quality.short { color: var(--bad); background: rgba(255, 122, 144, 0.12); }

@media (max-width: 480px) {
  .bedtime-row { flex-direction: column; align-items: flex-start; gap: 6px; }
  .bedtime-meta { text-align: left; }
}

.article .lead {
  color: var(--text-dim);
  font-size: 16px;
  margin-bottom: 20px;
  line-height: 1.55;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin: 20px 0 8px;
}

.contact-card h2 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.email-link {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent) !important;
  text-decoration: none !important;
  word-break: break-all;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  margin-top: 40px;
  text-align: center;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 18px;
  margin-bottom: 14px;
}

.footer-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.15s ease;
}

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

.site-footer p {
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 6px;
}

.footer-note { font-style: italic; }
.copyright { font-size: 12px; }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 16px;
  left: 16px;
  right: 16px;
  max-width: 560px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 100;
  font-size: 14px;
  animation: slideUp 0.4s ease;
}

@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.cookie-banner p { margin: 0; color: var(--text-dim); flex: 1; line-height: 1.45; }
.cookie-banner a { color: var(--accent); text-decoration: underline; }
.cookie-banner button {
  background: var(--accent);
  color: #0b1020;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  font-weight: 700;
  font-family: inherit;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
}
.cookie-banner button:hover { background: var(--accent-hover); }
.cookie-banner.hidden { display: none; }

@media (max-width: 480px) {
  .hero { padding: 36px 16px 24px; }
  .calculator { padding: 20px; }
  .times-grid { grid-template-columns: 1fr; }
  .mode-btn { font-size: 13px; padding: 10px 8px; }
  .article { padding: 36px 16px 24px; }
  .cookie-banner { flex-direction: column; align-items: stretch; }
  .cookie-banner button { width: 100%; }
}