/* Blackjack 101 — shared stylesheet */

:root {
  --felt: #0b5d3b;
  --felt-dark: #073c26;
  --gold: #e8c56a;
  --ink: #1c1c1c;
  --paper: #f7f5ef;
  --card-red: #c0272d;
  --border: #d8d3c4;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

/* --- Header --- */

header {
  background: var(--felt);
  background-image: linear-gradient(160deg, var(--felt), var(--felt-dark));
  color: #fff;
  padding: 2.5rem 1.5rem 2rem;
  text-align: center;
  border-bottom: 4px solid var(--gold);
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
  letter-spacing: 0.04em;
}

.tagline {
  margin: 0.4rem 0 0;
  color: var(--gold);
  font-style: italic;
}

/* --- Navigation --- */

nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  background: var(--felt-dark);
  padding: 0.5rem;
}

nav a {
  color: #e6e6e6;
  text-decoration: none;
  padding: 0.5rem 1.1rem;
  border-radius: 4px;
  font-size: 0.95rem;
}

nav a:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

nav a.active {
  background: var(--gold);
  color: var(--felt-dark);
  font-weight: bold;
}

/* --- Layout --- */

main {
  max-width: 820px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

section {
  margin-bottom: 2.25rem;
}

h2 {
  border-bottom: 2px solid var(--border);
  padding-bottom: 0.3rem;
  margin-top: 0;
}

h3 {
  margin-bottom: 0.4rem;
}

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

/* --- Hero cards --- */

.hero {
  text-align: center;
}

.cards {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.card {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 68px;
  height: 96px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.18);
  font-size: 1.5rem;
  font-weight: bold;
}

.card.black { color: var(--ink); transform: rotate(-6deg); }
.card.red   { color: var(--card-red); transform: rotate(5deg); }

/* --- Tables --- */

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  margin-top: 0.75rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.7rem;
  text-align: left;
}

thead th {
  background: var(--felt);
  color: #fff;
}

.table-scroll {
  overflow-x: auto;
}

table.grid td,
table.grid th {
  text-align: center;
  padding: 0.4rem;
  font-size: 0.9rem;
}

table.grid tbody th {
  background: #efece2;
  text-align: left;
  white-space: nowrap;
}

/* Strategy cell colors */
.h { background: #fbe3e0; }  /* hit */
.s { background: #dceede; }  /* stand */
.d { background: #fdf0cd; }  /* double */
.y { background: #dceede; }  /* split */
.n { background: #fbe3e0; }  /* don't split */

.legend {
  font-size: 0.9rem;
  color: #555;
  margin-bottom: 0;
}

/* --- Definition lists --- */

dl dt, .glossary dt {
  font-weight: bold;
  margin-top: 1rem;
  color: var(--felt-dark);
}

dl dd, .glossary dd {
  margin: 0.2rem 0 0 1.25rem;
}

/* --- Callout --- */

.callout {
  background: #fff;
  border-left: 5px solid var(--gold);
  padding: 1rem 1.25rem;
  border-radius: 0 6px 6px 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.callout h2,
.callout h3 {
  margin-top: 0;
  border-bottom: none;
}

.note {
  font-size: 0.9rem;
  color: #555;
  font-style: italic;
}

/* --- Footer --- */

footer {
  background: var(--felt-dark);
  color: #cfcfcf;
  text-align: center;
  padding: 1.25rem;
  font-size: 0.85rem;
}

/* --- Small screens --- */

@media (max-width: 600px) {
  header h1 { font-size: 1.9rem; }
  main { padding: 1.5rem 1rem 2rem; }
}