/* Chess Review landing page styles.
   Theme mirrors the app (frontend/styles.css) so the site and the tool feel like one product. */

:root {
  --bg: #161512;
  --panel: #262421;
  --panel2: #322f2b;
  --border: #34322e;
  --text: #e8e6e3;
  --muted: #9c9890;
  --accent: #629924;
  --accent-bright: #7cb342;
  --inaccuracy: #e0a800;
  --mistake: #e08000;
  --blunder: #d33;
  --max: 880px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---- Hero ---- */
.hero {
  text-align: center;
  padding: 72px 0 40px;
  border-bottom: 1px solid var(--border);
}

.hero .brand {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent-bright);
  margin-bottom: 18px;
}

.hero .eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(34px, 6vw, 52px);
  line-height: 1.1;
  margin: 0 0 16px;
  font-weight: 700;
}

.hero h1 .accent { color: var(--accent-bright); }

.hero .tagline {
  font-size: clamp(17px, 2.4vw, 21px);
  color: var(--muted);
  max-width: 620px;
  margin: 0 auto 30px;
}

.buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { text-decoration: none; }
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-bright); }
.btn.secondary { background: transparent; color: var(--text); border-color: var(--border); }
.btn.secondary:hover { background: var(--panel); }

.local-note {
  display: inline-block;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 10px 22px;
  margin: 0 auto 40px;
  max-width: 540px;
}
.local-note strong { color: var(--accent-bright); font-weight: 600; }

/* ---- Screenshots ---- */
figure { margin: 0; }

.shot {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
}

.hero .shot {
  max-width: 760px;
  margin: 0 auto;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
}

figcaption {
  text-align: center;
  color: var(--muted);
  font-size: 13.5px;
  margin-top: 10px;
}

/* ---- Sections ---- */
section { padding: 56px 0; border-bottom: 1px solid var(--border); }
section h2 {
  font-size: clamp(24px, 3.4vw, 30px);
  margin: 0 0 14px;
  text-align: center;
}
section .lead {
  color: var(--muted);
  text-align: center;
  max-width: 640px;
  margin: 0 auto 36px;
  font-size: 16px;
}

/* The idea: before/after contrast */
.contrast {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  max-width: 760px;
  margin: 0 auto;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 24px;
}
.card .label {
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.card.before .eval {
  font-family: ui-monospace, Menlo, monospace;
  font-size: 30px;
  color: var(--muted);
  font-weight: 700;
}
.card.before p { color: var(--muted); margin: 8px 0 0; font-size: 14px; }
.card.after { border-color: #3a5a1e; }
.card.after .quote { font-size: 15.5px; }
.card.after .quote b { color: var(--accent-bright); }

/* Feature grid */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
}
.feature .icon { font-size: 22px; margin-bottom: 10px; display: block; }
.feature h3 { margin: 0 0 6px; font-size: 16px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }

/* Arrow legend chips */
.legend {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 28px;
}
.chip { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); }
.dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.dot.played { background: #888; }
.dot.best { background: var(--accent); }
.dot.refute { background: var(--blunder); }

/* How it works */
.arch {
  background: #f4f4f0;
  border-radius: 10px;
  padding: 22px;
  max-width: 720px;
  margin: 0 auto 6px;
}
.arch img { width: 100%; height: auto; display: block; }

/* Get started */
.start-steps {
  max-width: 640px;
  margin: 0 auto;
}
.start-steps .opt {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 22px;
  margin-bottom: 14px;
}
.start-steps h3 { margin: 0 0 8px; font-size: 16px; }
.start-steps p { margin: 0; color: var(--muted); font-size: 14.5px; }
.start-steps .opt-readme { margin-top: 12px; font-size: 13.5px; }
code {
  font-family: ui-monospace, Menlo, monospace;
  background: var(--panel2);
  color: #e7e3da;
  padding: 2px 7px;
  border-radius: 5px;
  font-size: 13.5px;
}

/* ---- FAQ ---- */
.faq {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px 20px;
  margin-bottom: 14px;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  padding: 16px 0;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "+";
  color: var(--accent-bright);
  font-weight: 700;
  margin-right: 10px;
}
.faq[open] summary::before { content: "\2013"; }
.faq-body { padding: 0 0 12px; }
.faq-body p { color: var(--muted); font-size: 15px; line-height: 1.65; margin: 0 0 12px; }
.faq-body p.muted { font-size: 14px; }
.faq-body pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  overflow-x: auto;
  margin: 0 0 12px;
}
.faq-body pre code {
  background: none;
  padding: 0;
  color: #e7e3da;
  font-size: 13px;
  line-height: 1.6;
}

.faq-sub {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px 16px;
  margin: 4px 0 16px;
}
.faq-sub summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 14.5px;
  color: var(--accent-bright);
  padding: 12px 0;
  list-style: none;
}
.faq-sub summary::-webkit-details-marker { display: none; }
.faq-sub summary::before {
  content: "+";
  font-weight: 700;
  margin-right: 8px;
}
.faq-sub[open] summary::before { content: "\2013"; }
.faq-sub .faq-body { padding: 0 0 8px; }

/* Footer */
footer {
  text-align: center;
  padding: 36px 0 56px;
  color: var(--muted);
  font-size: 14px;
}
footer a { color: var(--muted); }
footer .made { margin-top: 8px; font-size: 13px; }

/* ---- Responsive ---- */
@media (max-width: 720px) {
  .features { grid-template-columns: 1fr; }
  .contrast { grid-template-columns: 1fr; }
}