:root {
  --bg: #f7f7f8;
  --surface: #ffffff;
  --text: #1a1a1e;
  --muted: #6b6b74;
  --border: #dcdce0;
  --accent: #3a5ba0;
  --match: #4c8c4a;
  --match-bg: #e4f3e3;
  --partial: #b8860b;
  --partial-bg: #fbf1d9;
  --no-match: #8a8a92;
  --no-match-bg: #ececee;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171b;
    --surface: #212126;
    --text: #eceef0;
    --muted: #9a9aa3;
    --border: #3a3a42;
    --accent: #7fa0e0;
    --match: #6fcb6a;
    --match-bg: #1e2f1c;
    --partial: #e0b84d;
    --partial-bg: #332b12;
    --no-match: #8f8f98;
    --no-match-bg: #2a2a30;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header h1 {
  font-size: 1.25rem;
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.tagline {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.day-label {
  font-size: 0.85rem;
  color: var(--muted);
}

.icon-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
  color: var(--text);
}

.icon-btn:hover { background: var(--bg); }

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 1.25rem 1rem;
}

.instructions {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.mode-switcher {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.9rem;
}

.mode-btn {
  padding: 0.4rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
}

.mode-btn:hover { background: var(--bg); }

.mode-btn--active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.mode-note {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0.5rem 0 0;
}

.new-random-btn {
  margin-top: 0.6rem;
  padding: 0.45rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}

.new-random-btn:hover { background: var(--bg); }

.guess-form { margin: 1rem 0 0.5rem; }

.autocomplete { position: relative; }

#guess-input {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
}

#guess-input:disabled { opacity: 0.6; }

.ac-list {
  position: absolute;
  z-index: 10;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  margin: 0;
  padding: 0.25rem;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  max-height: 280px;
  overflow-y: auto;
}

.ac-list li {
  padding: 0.5rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.95rem;
}

.ac-list li:hover,
.ac-option--active {
  background: var(--bg);
}

.ac-option--disabled {
  color: var(--muted);
  text-decoration: line-through;
  cursor: not-allowed;
}

.guesses-left {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0.25rem 0 1rem;
}

.status-banner {
  background: var(--match-bg);
  color: var(--match);
  border: 1px solid var(--match);
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.board {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  overflow-x: auto;
}

.board-row {
  display: grid;
  grid-template-columns: 1.3fr repeat(6, minmax(0, 1fr));
  gap: 0.3rem;
  min-width: 640px;
}

.board-row--header {
  min-width: 640px;
}

.cell {
  border-radius: 8px;
  padding: 0.45rem 0.35rem;
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 0.15rem;
  line-height: 1.25;
  border: 1px solid var(--border);
  background: var(--surface);
}

.cell--guess {
  align-items: flex-start;
  text-align: left;
  font-weight: 600;
  background: var(--surface);
}

.cell--header {
  background: transparent;
  border: none;
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: 0.68rem;
}

.cell--match {
  background: var(--match-bg);
  border-color: var(--match);
  color: var(--match);
}

.cell--partial {
  background: var(--partial-bg);
  border-color: var(--partial);
  color: var(--partial);
}

.cell--unknown {
  background: var(--no-match-bg);
  border-color: var(--border);
  color: var(--muted);
  border-style: dashed;
}

.cell--no-match {
  background: var(--no-match-bg);
  border-color: var(--border);
  color: var(--no-match);
}

.cell-icon { font-size: 1rem; }
.cell-text { font-size: 0.72rem; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 100;
}

.modal[hidden] {
  display: none;
}

.modal-content {
  background: var(--surface);
  border-radius: 12px;
  padding: 1.25rem;
  max-width: 360px;
  width: 100%;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.modal-header h2 { margin: 0; font-size: 1.1rem; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  text-align: center;
}

.stats-grid div { display: flex; flex-direction: column; }
.stats-grid strong { font-size: 1.4rem; }
.stats-grid span { font-size: 0.7rem; color: var(--muted); }

.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.75rem;
  padding: 2rem 1rem;
}

@media (max-width: 480px) {
  .site-header h1 { font-size: 1.05rem; }
  .tagline { display: none; }
}