:root {
  --bg: #faf8f5;
  --bg-elev: #f3efe8;
  --ink: #1a1714;
  --ink-soft: #5a5147;
  --rule: #e6e0d4;
  --accent: #8b6f47;
  --board: #d9b779;
  --board-line: #3a2a17;
  --stone-black: #1a1714;
  --stone-white: #fbf9f4;
  --max: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15130f;
    --bg-elev: #1f1c17;
    --ink: #ece6da;
    --ink-soft: #a39b8c;
    --rule: #2a2620;
    --accent: #c9a373;
    --board: #b88f4f;
    --board-line: #1a1208;
    --stone-black: #0a0805;
    --stone-white: #f4eedf;
  }
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0;
}

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

.section-title {
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  margin-bottom: 32px;
}

/* Hero ---------------------------------------------------------------- */
.hero {
  text-align: center;
  padding: 120px 0 80px;
}

.hero__icon {
  width: 120px;
  height: 120px;
  border-radius: 26px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08), 0 1px 0 rgba(0,0,0,0.04);
  margin-bottom: 32px;
}

.hero__title {
  font-size: clamp(40px, 7vw, 64px);
  margin-bottom: 12px;
}

.hero__tagline {
  font-size: clamp(18px, 2.5vw, 22px);
  color: var(--ink-soft);
  margin: 0 0 40px;
}

.appstore {
  display: inline-block;
  color: var(--ink);
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.appstore:hover {
  text-decoration: none;
  opacity: 0.85;
  transform: translateY(-1px);
}
.appstore svg {
  display: block;
  width: 168px;
  height: 56px;
}

/* Prose --------------------------------------------------------------- */
.prose {
  padding: 40px 0;
  font-size: 19px;
  color: var(--ink-soft);
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}
.prose p { margin: 0; }

/* Features ------------------------------------------------------------ */
.features { padding: 80px 0; }

.feature-grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px 40px;
}

.feature-grid h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

.feature-grid p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.6;
}

@media (max-width: 560px) {
  .feature-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* Screenshots --------------------------------------------------------- */
.screenshots { padding: 80px 0; }

.screenshot-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 0 0 16px;
}

.screenshot { margin: 0; }
.screenshot figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-soft);
  text-align: center;
}

.phone {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 19;
  background: var(--ink);
  border-radius: 28px;
  padding: 8px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.10), 0 1px 0 rgba(0,0,0,0.06);
}

.phone__screen {
  width: 100%;
  height: 100%;
  background: var(--bg-elev);
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.board {
  background: var(--board);
  width: 88%;
  aspect-ratio: 1;
  background-image:
    linear-gradient(var(--board-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--board-line) 1px, transparent 1px);
  border: 1px solid var(--board-line);
}

.board--9  { background-size: calc(100% / 8) calc(100% / 8); }
.board--13 { background-size: calc(100% / 12) calc(100% / 12); }
.board--19 { background-size: calc(100% / 18) calc(100% / 18); }

.phone__screen--scoring { background: var(--bg-elev); position: relative; }
.phone__screen--scoring::after {
  content: "";
  position: absolute;
  inset: 12px 12px auto 12px;
  height: 6px;
  background: var(--rule);
  border-radius: 3px;
}

.phone__screen--helpers .board {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.screenshots__note {
  text-align: center;
  color: var(--ink-soft);
  font-size: 13px;
  margin: 24px 0 0;
}

@media (max-width: 560px) {
  .screenshot-row { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .phone { border-radius: 18px; padding: 5px; }
  .phone__screen { border-radius: 14px; }
}

/* Pricing ------------------------------------------------------------- */
.pricing {
  padding: 80px 0;
  text-align: center;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.pricing__line {
  font-size: clamp(22px, 3vw, 28px);
  margin: 0;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.pricing__price { color: var(--accent); }

/* FAQ ----------------------------------------------------------------- */
.faq { padding: 80px 0; }

.faq dl { margin: 0; }
.faq dt {
  font-weight: 600;
  margin-top: 24px;
  font-size: 17px;
}
.faq dt:first-of-type { margin-top: 0; }
.faq dd {
  margin: 4px 0 0;
  color: var(--ink-soft);
}

/* Footer -------------------------------------------------------------- */
footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 64px;
  border-top: 1px solid var(--rule);
  text-align: center;
  color: var(--ink-soft);
  font-size: 14px;
}

footer p { margin: 4px 0; }
footer a { color: var(--ink-soft); }
footer a:hover { color: var(--ink); }

.footer__year { margin-top: 16px; opacity: 0.7; }

/* Simple pages (privacy, support) ------------------------------------- */
.page { padding: 80px 0 40px; }
.page h1 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 24px;
}
.page p { color: var(--ink-soft); }
.page a.back {
  display: inline-block;
  margin-top: 32px;
  font-size: 14px;
  color: var(--ink-soft);
}