/* SleepMind site — one stylesheet, no framework, no web font, no request.
   Palette is the app's own: the dark theme's bg #080910 / card #12141f /
   accent #6c8fff / teal #4ecdc4 (src/theme/index.ts). The page is dark first
   because the app is, and light mode is derived from the same hues. */

:root {
  --bg: #080910;
  --card: #12141f;
  --card-2: #181b2a;
  --ink: #e8eaf6;
  --ink-mid: #9fa4c4;
  --ink-dim: #7d83a6;
  --accent: #6c8fff;
  --accent-soft: rgba(108, 143, 255, 0.12);
  --teal: #4ecdc4;
  --purple: #b89dff;
  --line: rgba(255, 255, 255, 0.09);
  --radius: 16px;
  --measure: 34rem;
  color-scheme: dark light;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f6fb;
    --card: #ffffff;
    --card-2: #f0f1f8;
    --ink: #1b1d2c;
    --ink-mid: #4e5372;
    --ink-dim: #6b7192;
    --accent: #3f5fd6;
    --accent-soft: rgba(63, 95, 214, 0.10);
    --teal: #0f7c74;
    --purple: #6b4fc4;
    --line: rgba(20, 22, 40, 0.11);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
        "Hiragino Sans", "Yu Gothic", "Noto Sans CJK SC", "PingFang SC",
        "PingFang TC", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  overflow-wrap: break-word;
}

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

img { max-width: 100%; height: auto; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--card);
  color: var(--ink);
  padding: 12px 16px;
  z-index: 10;
}
.skip:focus { left: 8px; top: 8px; }

/* ---------------------------------------------------------------- chrome */

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
}

.brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.brand-mark {
  display: inline-block;
  width: 26px;
  height: 26px;
  line-height: 26px;
  text-align: center;
  border-radius: 9px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-right: 6px;
  font-size: 15px;
}

.topnav { display: flex; gap: 18px; flex-wrap: wrap; margin-right: auto; }
.topnav a { color: var(--ink-mid); text-decoration: none; font-size: 15px; }
.topnav a:hover { color: var(--ink); }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #0b0d18;
  text-decoration: none;
  font-weight: 700;
  border-radius: 12px;
  border: 1px solid transparent;
  text-align: center;
}
.btn:hover { color: #0b0d18; filter: brightness(1.08); }
.btn-small { padding: 8px 14px; font-size: 14px; }
.btn-big { padding: 14px 24px; font-size: 17px; }

main { display: block; }

section, .guide { padding: 0 20px; }

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.015em; }
h1 { font-size: clamp(30px, 6vw, 46px); margin: 0 0 16px; }
h2 { font-size: clamp(23px, 4vw, 30px); margin: 48px 0 16px; }
h3 { font-size: 19px; margin: 28px 0 10px; }

p, li { max-width: var(--measure); }

/* ------------------------------------------------------------------ hero */

.hero {
  display: grid;
  gap: 40px;
  grid-template-columns: 1fr;
  max-width: 1040px;
  margin: 0 auto;
  padding-top: 56px;
  padding-bottom: 40px;
}
@media (min-width: 900px) {
  .hero { grid-template-columns: 1.15fr 0.85fr; align-items: center; }
}

.kicker {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 12px;
}
.lede { font-size: 18px; color: var(--ink-mid); }
.cta-row { margin: 28px 0 10px; }
.cta-note { font-size: 14px; color: var(--ink-dim); margin-top: 0; }

/* hero art — the app's first screen */

.sm {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}
.sm-eyebrow {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  font-weight: 700;
  margin-bottom: 12px;
}
.sm-feels { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 16px; }
.sm-feel {
  font-size: 13px;
  padding: 6px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink-dim);
  background: var(--card-2);
}
.sm-feel.on {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 600;
}
.sm-field {
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  color: var(--ink);
  font-size: 15px;
  min-height: 72px;
}
.sm-repeat {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 14px;
  font-size: 14px;
  color: var(--purple);
}
.sm-dot {
  width: 15px;
  height: 15px;
  border-radius: 5px;
  border: 1px solid var(--purple);
  background: var(--purple);
  flex: none;
}
.sm-rule { border: 0; border-top: 1px solid var(--line); margin: 18px 0 14px; }
.sm-logrow {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--ink-mid);
  margin-bottom: 10px;
}
.sm-chev { color: var(--ink-dim); }
.sm-bar {
  position: relative;
  height: 26px;
  border-radius: 8px;
  background: var(--card-2);
  border: 1px solid var(--line);
  overflow: hidden;
}
.sm-span {
  position: absolute;
  top: 0;
  bottom: 0;
  background: linear-gradient(180deg, var(--accent), var(--purple));
  opacity: 0.85;
}
.sm-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--ink-dim);
  margin-top: 6px;
}

/* ----------------------------------------------------------------- stats */

.stats { max-width: 1040px; margin: 0 auto; padding-bottom: 8px; }
.stats ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}
.stats li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  max-width: none;
}
.stats strong { display: block; font-size: 24px; color: var(--accent); letter-spacing: -0.02em; }
.stats span { font-size: 14px; color: var(--ink-dim); }

/* -------------------------------------------------------------- sections */

.features, .setup, .privacy, .pricing, .faq, .guides-teaser {
  max-width: 1040px;
  margin: 0 auto;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin-top: 0; }
.card p { color: var(--ink-mid); font-size: 16px; max-width: none; }

.steps { counter-reset: step; list-style: none; padding: 0; margin: 24px 0 0; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 0 0 0 46px;
  margin-bottom: 26px;
  max-width: var(--measure);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.steps strong { display: block; margin-bottom: 4px; }
.steps span { color: var(--ink-mid); }

.note {
  border-left: 3px solid var(--teal);
  padding: 4px 0 4px 16px;
  color: var(--ink-mid);
  font-size: 15px;
  margin-top: 28px;
  max-width: var(--measure);
}

.privacy p, .pricing p { color: var(--ink-mid); }

/* ------------------------------------------------------------------- faq */

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 4px 0;
}
.faq summary {
  cursor: pointer;
  padding: 16px 0;
  font-weight: 600;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+ "; color: var(--accent); font-weight: 700; }
.faq details[open] summary::before { content: "\2013 "; }
.faq details p { color: var(--ink-mid); margin-top: 0; padding-bottom: 12px; }

/* --------------------------------------------------------------- guides */

.guide { max-width: 720px; margin: 0 auto; padding-top: 40px; }
.guide p, .guide li { color: var(--ink-mid); }
.guide h2 { color: var(--ink); }
.guide .lede { font-size: 18px; }

.crumbs { font-size: 14px; color: var(--ink-dim); margin-bottom: 24px; }
.crumbs a { color: var(--ink-dim); }

.guide-index { list-style: none; padding: 0; }
.guide-index li { border-top: 1px solid var(--line); padding: 20px 0; max-width: none; }
.guide-index h2 { font-size: 20px; margin: 0 0 6px; }
.guide-index h2 a { text-decoration: none; }
.guide-index p { margin: 0; font-size: 16px; }

.guide-links, .related { padding-left: 20px; }
.guides-teaser { padding-top: 8px; }

/* ---------------------------------------------------------------- footer */

.footer {
  border-top: 1px solid var(--line);
  margin-top: 72px;
  padding: 32px 20px 56px;
  max-width: 1040px;
  margin-left: auto;
  margin-right: auto;
}
.langs ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 0;
  margin: 0 0 18px;
}
.langs a { color: var(--ink-mid); text-decoration: none; font-size: 15px; }
.langs a:hover { color: var(--ink); }
.lang-current { color: var(--ink); font-weight: 600; font-size: 15px; }

.legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
  margin-bottom: 16px;
}
.legal a { color: var(--ink-mid); }

.small { font-size: 13px; color: var(--ink-dim); max-width: var(--measure); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Mobile product entry and keyboard access. */
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.btn:active { transform: scale(.97); filter: brightness(.94); }
@media (max-width: 700px) {
  .topbar { gap: 8px 10px; padding: 14px 16px 8px; }
  .brand { font-size: 17px; }
  .topbar .btn-small { order: 2; margin-inline-start: auto; padding: 8px 12px; font-size: 12px; }
  .topnav { order: 3; flex-basis: 100%; margin-inline-start: 0; gap: 16px; flex-wrap: nowrap; overflow-x: auto; white-space: nowrap; scrollbar-width: none; }
  .topnav::-webkit-scrollbar { display: none; }
  .topnav a { display: inline-block; padding: 6px 0; font-size: 13px; }
  .hero { padding-top: 20px; gap: 20px; }
  .hero h1 { font-size: clamp(30px, 8vw, 39px); line-height: 1.12; margin-bottom: 12px; }
  .hero .lede { font-size: 15px; line-height: 1.55; margin-bottom: 18px; }
}