:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5a5a5a;
  --line: #e2e2e2;
  --link: #1a5fb4;
  --accent-bg: #f6f6f4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14151a;
    --fg: #eceef2;
    --muted: #a6a9b4;
    --line: #2c2e36;
    --link: #7aa2f7;
    --accent-bg: #1c1e26;
  }
}

* { box-sizing: border-box; }

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

.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

header.site {
  border-bottom: 1px solid var(--line);
  padding: 1rem 1.25rem;
}

header.site .wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

header.site a.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--fg);
  text-decoration: none;
}

nav.site a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}
nav.site a:hover { color: var(--link); }

h1 { font-size: 1.7rem; line-height: 1.25; margin: 0 0 0.75rem; }
h2 { font-size: 1.25rem; margin-top: 2.25rem; }
h3 { font-size: 1.05rem; margin-top: 1.75rem; }

p { margin: 0 0 1rem; }

a { color: var(--link); }

ul, ol { padding-left: 1.25rem; }
li { margin-bottom: 0.4rem; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.92rem;
}
th, td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th { color: var(--muted); font-weight: 600; }

.byline {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 2rem;
}

.faq dt {
  font-weight: 600;
  margin-top: 1.25rem;
}
.faq dd {
  margin: 0.35rem 0 0;
  color: var(--fg);
}

.note {
  background: var(--accent-bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.9rem 1.1rem;
  font-size: 0.92rem;
  color: var(--muted);
  margin: 1.5rem 0;
}

footer.site {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding: 1.5rem 1.25rem;
  color: var(--muted);
  font-size: 0.85rem;
}
footer.site .wrap { max-width: 42rem; margin: 0 auto; padding: 0; }

/* Hero */
.hero { display: flex; flex-direction: column; align-items: center; text-align: center; margin-bottom: 1rem; }
.hero svg { width: 100%; max-width: 320px; height: auto; margin: 0.5rem 0 1.25rem; }
.hero h1 { max-width: 34rem; }
.hero p.lede { max-width: 34rem; color: var(--muted); font-size: 1.05rem; }

/* Card grid (landing page) */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 1.75rem 0;
}
@media (max-width: 30rem) {
  .card-grid { grid-template-columns: 1fr; }
}
.card {
  display: block;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.1rem;
  text-decoration: none;
  color: var(--fg);
  background: var(--accent-bg);
  transition: border-color 0.15s ease;
}
.card:hover { border-color: var(--link); }
.card svg { width: 2.25rem; height: 2.25rem; color: var(--link); margin-bottom: 0.6rem; }
.card h3 { margin: 0 0 0.35rem; font-size: 1rem; color: var(--fg); }
.card p { margin: 0; font-size: 0.88rem; color: var(--muted); }

/* Betslip SVG mockups */
.betslip-row {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  justify-content: center;
  margin: 1.75rem 0;
}
.betslip-row figure { margin: 0; text-align: center; }
.betslip-row svg { width: 220px; height: auto; max-width: 100%; }
.betslip-row figcaption { margin-top: 0.5rem; font-size: 0.85rem; color: var(--muted); }

/* Worked-example results table */
.result-highlight { font-weight: 700; }
.profit-positive { color: #1e8e3e; }
@media (prefers-color-scheme: dark) { .profit-positive { color: #4ade80; } }

/* Calculator */
.calc-form {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.25rem;
  background: var(--accent-bg);
  margin: 1.5rem 0;
}
.calc-outcome {
  display: grid;
  grid-template-columns: 1fr 6rem;
  gap: 0.6rem;
  align-items: end;
  margin-bottom: 0.9rem;
}
.calc-outcome label {
  display: block;
  font-size: 0.82rem;
  color: var(--muted);
  margin-bottom: 0.3rem;
}
.calc-form input[type="text"],
.calc-form input[type="number"] {
  width: 100%;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--fg);
  font-size: 0.95rem;
}
.calc-toggle { margin-bottom: 1rem; font-size: 0.9rem; }
.calc-toggle label { margin-right: 1rem; cursor: pointer; }
.calc-total { margin-top: 0.75rem; }
.calc-results { margin-top: 1.5rem; }
.badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}
.badge-good { background: #dcfce7; color: #166534; }
.badge-bad { background: #fee2e2; color: #991b1b; }
@media (prefers-color-scheme: dark) {
  .badge-good { background: #14532d; color: #86efac; }
  .badge-bad { background: #4c1d1d; color: #fca5a5; }
}

/* Tips list */
.tips-list { list-style: none; padding: 0; counter-reset: tip; }
.tips-list li {
  counter-increment: tip;
  position: relative;
  padding-left: 2.75rem;
  margin-bottom: 1.5rem;
}
.tips-list li::before {
  content: counter(tip);
  position: absolute;
  left: 0;
  top: -0.1rem;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent-bg);
  border: 1px solid var(--line);
  color: var(--link);
  font-weight: 700;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.tips-list h3 { margin: 0 0 0.3rem; font-size: 1rem; }
.tips-list p { margin: 0; }