/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.site-header {
  background: var(--color-header-bg);
  color: var(--color-header-text);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-header);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.site-logo {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-header-text);
  text-decoration: none;
}
.site-nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.site-nav a {
  color: var(--color-header-text);
  text-decoration: none;
  font-size: 0.9rem;
  opacity: 0.85;
  transition: opacity 0.2s;
}
.site-nav a:hover { opacity: 1; }

/* Hero */
.hero {
  text-align: center;
  padding: 3rem 0 2rem;
}
.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--color-heading);
  margin-bottom: 0.5rem;
}
.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--color-muted);
}

/* About & Sections */
section { margin-bottom: 2.5rem; }
section h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  color: var(--color-heading);
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 0.3rem;
}
section p { margin-bottom: 0.8rem; }

/* Store Badges */
.store-badges {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.store-badges a {
  display: inline-flex;
  align-items: center;
  transition: opacity 0.15s;
}
.store-badges a:hover { opacity: 0.8; }
.store-badge {
  height: 40px;
  width: auto;
}
.store-badge[alt*="Google Play"] {
  height: 60px;
  margin: -10px -12px;
}

/* Level Groups */
.level-group {
  margin-bottom: 0.8rem;
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-card);
  overflow: hidden;
}
.level-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.2rem;
  background: var(--color-card-bg);
  cursor: pointer;
  user-select: none;
  list-style: none;
  font-family: var(--font-heading);
  transition: background 0.15s;
}
.level-group-header::-webkit-details-marker { display: none; }
.level-group-header::before {
  content: "\25B6";
  font-size: 0.7rem;
  margin-right: 0.7rem;
  transition: transform 0.2s;
  color: var(--color-accent);
}
details[open] > .level-group-header::before {
  transform: rotate(90deg);
}
.level-group-header:hover { background: var(--color-group-hover, rgba(0,0,0,0.03)); }
.level-group-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-heading);
}
.level-group-count {
  font-size: 0.82rem;
  color: var(--color-muted);
  font-weight: 400;
}

/* Level Grid */
.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.7rem;
  padding: 1rem 1.2rem;
}
.level-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.8rem 0.5rem;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-card);
  text-decoration: none;
  color: var(--color-text);
  transition: transform 0.15s, box-shadow 0.15s;
}
.level-card:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,0,0,0.1); }
.level-number {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
}
.level-info { font-size: 0.8rem; color: var(--color-muted); margin-top: 0.2rem; }

/* How to Play */
.how-to-play ol {
  padding-left: 1.5rem;
}
.how-to-play li {
  margin-bottom: 0.5rem;
}

/* Crossword Grid */
.crossword-grid-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.crossword-grid {
  display: inline-grid;
  grid-template-columns: repeat(var(--grid-cols), var(--cell-size));
  gap: 1px;
  background: var(--color-grid-border);
  border: 2px solid var(--color-grid-border);
  margin: 0 auto;
}
.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  background: var(--color-cell-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  font-family: var(--font-grid);
}
.cell.black { background: var(--color-cell-black); }
.cell-number {
  position: absolute;
  top: 1px;
  left: 2px;
  font-size: var(--font-size-number);
  line-height: 1;
  color: var(--color-cell-number);
  font-weight: 600;
}
.cell-letter {
  font-size: var(--font-size-letter);
  font-weight: 700;
  color: var(--color-cell-letter);
  text-transform: uppercase;
}

/* Clues Section */
.clues-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.clue-item {
  margin-bottom: 1rem;
  padding: 0.8rem;
  background: var(--color-card-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-card-border);
}
.clue-header {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}
.clue-number {
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--color-accent);
}
.clue-answer {
  font-weight: 700;
  font-family: var(--font-grid);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  color: var(--color-answer);
  text-transform: uppercase;
}
.clue-list {
  list-style: none;
  padding: 0;
}
.clue-list li {
  padding: 0.2rem 0;
  padding-left: 1rem;
  position: relative;
  font-size: 0.93rem;
  color: var(--color-muted);
}
.clue-list li::before {
  content: "\2022";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* Level Solution Meta */
.level-meta {
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

/* CTA */
.cta { text-align: center; padding: 2rem 0; }

/* Footer */
.site-footer {
  background: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: 1.5rem 0;
  text-align: center;
  margin-top: 2rem;
}
.site-footer .store-badges {
  justify-content: center;
  margin-top: 0.8rem;
}
.site-footer .store-badge {
  height: 32px;
}
.site-footer .store-badge[alt*="Google Play"] {
  height: 48px;
  margin: -8px -10px;
}

/* Responsive */
@media (max-width: 768px) {
  .clues-section {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .level-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    padding: 0.8rem;
  }
  .hero { padding: 2rem 0 1.5rem; }
  .site-header .container { justify-content: center; text-align: center; }
  .site-nav { justify-content: center; }
}

@media (max-width: 480px) {
  :root {
    --cell-size: 28px;
    --font-size-letter: 14px;
    --font-size-number: 7px;
  }
  .level-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    padding: 0.6rem;
    gap: 0.5rem;
  }
  .store-badges { justify-content: center; }
  .store-badge { height: 36px; }
  .store-badge[alt*="Google Play"] { height: 54px; margin: -9px -11px; }
  .clue-item { padding: 0.6rem; }
}

/* Classic Theme */
:root {
  --font-body: Georgia, "Times New Roman", serif;
  --font-heading: Georgia, "Times New Roman", serif;
  --font-grid: "Courier New", monospace;
  --color-bg: #faf8f5;
  --color-text: #2c2c2c;
  --color-heading: #1a1a1a;
  --color-muted: #666;
  --color-accent: #8b4513;
  --color-answer: #2e5a2e;
  --color-header-bg: #2c2c2c;
  --color-header-text: #f5f0eb;
  --shadow-header: 0 2px 4px rgba(0,0,0,0.2);
  --color-card-bg: #fff;
  --color-card-border: #ddd;
  --color-grid-border: #333;
  --color-cell-bg: #fff;
  --color-cell-black: #2c2c2c;
  --color-cell-number: #666;
  --color-cell-letter: #1a1a1a;
  --color-footer-bg: #2c2c2c;
  --color-footer-text: #ccc;
  --color-footer-link: #e0c9a6;
  --radius-btn: 4px;
  --radius-card: 4px;
  --cell-size: 38px;
  --font-size-letter: 18px;
  --font-size-number: 9px;
}