/* ShiftSleep - shared styles. Mobile-first, dark theme, no frameworks. */
:root {
  --bg: #0d1320;
  --surface: #151d2e;
  --surface-2: #1b2540;
  --text: #e9eef6;
  --muted: #9fabbe;
  --accent: #9aa2f7;
  --accent-soft: rgba(154, 162, 247, 0.12);
  --line: #24304a;
  --good: #7fd08c;
  --radius: 12px;
  --maxw: 760px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.65;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.wide { max-width: 1000px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(13, 19, 32, 0.96);
  position: sticky; top: 0; z-index: 50;
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; padding-bottom: 14px;
}
.logo { font-weight: 800; font-size: 20px; color: var(--text); letter-spacing: 0.2px; }
.logo span { color: var(--accent); }
.nav a { color: var(--muted); margin-left: 18px; font-size: 15px; }
.nav a:hover { color: var(--text); }

/* Hero */
.hero { padding: 56px 0 40px; text-align: left; }
.hero h1 { font-size: 34px; line-height: 1.2; margin: 0 0 14px; }
.hero h1 .hl { color: var(--accent); }
.hero p.lead { color: var(--muted); font-size: 19px; margin: 0 0 24px; max-width: 620px; }
.btn {
  display: inline-block; background: var(--accent); color: #12142a;
  font-weight: 700; padding: 12px 22px; border-radius: 10px; border: 0;
  cursor: pointer; font-size: 16px;
}
.btn:hover { text-decoration: none; filter: brightness(1.06); }
.btn-ghost {
  display: inline-block; border: 1px solid var(--line); color: var(--text);
  padding: 12px 22px; border-radius: 10px; margin-left: 10px; font-size: 16px;
}
.btn-ghost:hover { text-decoration: none; border-color: var(--accent); }

/* Cards */
.grid { display: grid; gap: 16px; grid-template-columns: 1fr; margin: 28px 0; }
@media (min-width: 640px) { .grid.cols-3 { grid-template-columns: repeat(3, 1fr); } .grid.cols-2 { grid-template-columns: repeat(2, 1fr); } }
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 19px; }
.card p { color: var(--muted); margin: 0 0 12px; font-size: 15.5px; }
.card .go { font-weight: 700; font-size: 15px; }

.section { padding: 36px 0; }
.section h2 { font-size: 26px; margin: 0 0 10px; }
.section .sub { color: var(--muted); margin: 0 0 6px; }

/* Article */
.article { padding: 36px 0 56px; }
.article h1 { font-size: 32px; line-height: 1.25; margin: 0 0 8px; }
.article .meta { color: var(--muted); font-size: 14px; margin-bottom: 22px; }
.article h2 { font-size: 23px; margin: 34px 0 10px; }
.article h3 { font-size: 19px; margin: 26px 0 8px; }
.article p, .article li { color: #d4dbe7; }
.article ul, .article ol { padding-left: 22px; }
.article li { margin-bottom: 8px; }
.disclosure {
  background: var(--accent-soft); border: 1px solid rgba(154,162,247,0.35);
  border-radius: var(--radius); padding: 14px 16px; font-size: 14.5px; color: var(--muted);
  margin: 20px 0;
}
.disclosure strong { color: var(--accent); }

/* Product picks */
.pick {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px; margin: 16px 0;
  display: grid; gap: 6px;
}
.pick h3 { margin: 0; font-size: 18px; }
.pick .why { color: var(--muted); font-size: 16px; margin: 0; }
.pick .price { font-weight: 700; color: var(--good); font-size: 15px; }

/* Product boxes (roundup guides) */
.product-box { position: relative; padding-top: 24px; }
.badge {
  display: inline-block; background: var(--accent); color: #12142a;
  font-weight: 800; font-size: 12.5px; letter-spacing: 0.6px; text-transform: uppercase;
  padding: 5px 12px; border-radius: 999px; margin-bottom: 10px;
}
.pros-cons { display: grid; gap: 10px; margin: 12px 0 6px; }
@media (min-width: 640px) { .pros-cons { grid-template-columns: 1fr 1fr; } }
.pros, .cons {
  background: var(--surface-2); border: 1px solid var(--line);
  border-radius: 8px; padding: 10px 14px;
}
.pros strong { color: var(--good); }
.cons strong { color: #e08a8a; }
.pros ul, .cons ul { margin: 6px 0 4px; padding-left: 18px; }
.pros li, .cons li { font-size: 15.5px; color: #d4dbe7; margin-bottom: 5px; }
.pick .cta { margin: 14px 0 6px; }
.pick .cta .btn { width: 100%; text-align: center; font-size: 17px; padding: 14px 22px; }
@media (min-width: 640px) { .pick .cta .btn { width: auto; } }

/* Guides hub sections */
.hub-section { margin-top: 40px; }
.hub-section:first-of-type { margin-top: 28px; }
.hub-section > h2 {
  font-size: 24px; margin: 0 0 4px;
  padding-left: 14px; border-left: 4px solid var(--accent);
}
.hub-section > .sub { color: var(--muted); font-size: 16px; margin: 0 0 4px; }

/* Tool */
.tool-box {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px; margin: 24px 0;
}
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 700; margin-bottom: 6px; font-size: 15px; }
.field input, .field select {
  width: 100%; padding: 11px 12px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--surface-2); color: var(--text);
  font-size: 16px; font-family: var(--font);
}
.field .hint { color: var(--muted); font-size: 13.5px; margin-top: 5px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.result {
  display: none; background: var(--surface-2); border: 1px solid var(--accent);
  border-radius: var(--radius); padding: 22px; margin-top: 20px;
}
.result.show { display: block; }
.result h3 { margin: 0 0 10px; color: var(--accent); }
.result .big { font-size: 24px; font-weight: 800; margin: 6px 0; }
.result ul { margin: 10px 0 0; padding-left: 20px; color: #d4dbe7; }
.result li { margin-bottom: 6px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); margin-top: 40px; padding: 28px 0 40px; color: var(--muted); font-size: 14px; }
.site-footer .wrap { display: grid; gap: 10px; }
.site-footer nav a { color: var(--muted); margin-right: 16px; }

/* Small screens */
@media (max-width: 520px) {
  .hero h1 { font-size: 28px; }
  .btn-ghost { margin-left: 0; margin-top: 10px; }
  .field-row { grid-template-columns: 1fr; }
}