:root {
  --bg: #f4f1ea;
  --card-bg: #ffffff;
  --text: #1f2420;
  --text-muted: #6b6f6b;
  --border: #ddd6c8;
  --accent: #b3282d;
  --accent-text: #ffffff;
  --green: #2f6f4e;
  --warn-bg: #fdecea;
  --warn-text: #9a2f2f;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181a;
    --card-bg: #202325;
    --text: #e9e7e1;
    --text-muted: #9a9d99;
    --border: #33362f;
    --accent: #d9534f;
    --accent-text: #16181a;
    --green: #5fbf8a;
    --warn-bg: #3a2323;
    --warn-text: #ff9a9a;
    --shadow: 0 1px 3px rgba(0,0,0,0.4);
  }
}

* { 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);
  line-height: 1.4;
}

.app-header {
  padding: 1.75rem 1rem 1.25rem;
  text-align: center;
}
.app-header h1 {
  margin: 0.3rem 0 0;
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--accent);
}
.subtitle {
  margin: 0.3rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.header-tiles,
.tile-glyph {
  font-variant-emoji: text;
}
.header-tiles {
  font-size: 1.7rem;
  line-height: 1;
  letter-spacing: 0.15em;
  opacity: 0.9;
}
.header-tiles:last-of-type {
  margin-top: 0.6rem;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 0.5rem 1rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem 1.25rem;
  box-shadow: var(--shadow);
}
.card h2 {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

input[type="text"],
input[type="number"],
select {
  font-size: 0.95rem;
  padding: 0.4rem 0.5rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.player-names-label {
  margin-bottom: 0.9rem;
}
.player-name-inputs {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.4rem;
}
@media (max-width: 560px) {
  .player-name-inputs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.settings-row {
  margin-bottom: 0.9rem;
}
.settings-row-single {
  max-width: 220px;
}
.settings-row-triple {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem 1.2rem;
}
@media (max-width: 560px) {
  .settings-row-triple { grid-template-columns: 1fr; }
}
.checkbox-label {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  grid-column: 1 / -1;
}
.checkbox-label input { width: auto; }
.hint {
  color: var(--text-muted);
  font-size: 0.78rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
th, td {
  text-align: left;
  padding: 0.4rem 0.5rem;
  border-bottom: 1px solid var(--border);
}
th { color: var(--text-muted); font-weight: 600; }

/* Compass-style seating layout: North top, East right, South bottom, West left */
.mahjong-table {
  display: grid;
  grid-template-columns: minmax(90px, 1fr) minmax(120px, 1.3fr) minmax(90px, 1fr);
  grid-template-rows: auto auto auto;
  grid-template-areas:
    ".    north .   "
    "west center east"
    ".    south .   ";
  gap: 0.6rem;
  align-items: stretch;
  max-width: 560px;
  margin: 0 auto;
}
.seat-north { grid-area: north; }
.seat-west  { grid-area: west; }
.seat-east  { grid-area: east; }
.seat-south { grid-area: south; }

.seat {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.7rem;
  text-align: center;
  background: var(--bg);
}
.seat.is-dealer {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset;
}
.seat .seat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}
.seat .seat-name {
  font-weight: 600;
  font-size: 0.95rem;
  margin: 0.1rem 0;
  word-break: break-word;
}
.seat .seat-total {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--green);
}
.seat .seat-total.negative { color: var(--warn-text); }
.seat .dealer-badge {
  display: inline-block;
  margin-top: 0.25rem;
  font-size: 0.7rem;
  color: var(--accent);
  font-weight: 600;
}

.table-center {
  grid-area: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.center-wind {
  font-size: 1.8rem;
  line-height: 1;
}

.session-actions, .hand-actions {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.8rem;
  flex-wrap: wrap;
}

button {
  font-size: 0.9rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
}
button:hover:not(:disabled) { filter: brightness(1.08); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.primary {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
  font-weight: 600;
}
button.danger {
  color: var(--warn-text);
  border-color: var(--warn-text);
  background: transparent;
}

.hand-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.9rem;
  margin-bottom: 1rem;
}
#discarder-wrap[hidden] { display: none; }

.fan-groups {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.fan-group {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
}
.fan-group h3 {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}
.fan-options {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.35rem 1rem;
}
.fan-option {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  font-size: 0.87rem;
  color: var(--text);
  cursor: pointer;
}
.fan-option input { cursor: pointer; }
.fan-option .fan-value {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.78rem;
}
.fan-option .tile-glyph {
  font-size: 1.15rem;
  letter-spacing: -0.05em;
  line-height: 1;
  white-space: nowrap;
}

.extra-fan-label {
  max-width: 260px;
  margin-top: 0.9rem;
}

.result-bar {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-top: 1rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
}
.fan-total span, .points-total span {
  font-weight: 700;
  color: var(--green);
}
.warning {
  background: var(--warn-bg);
  color: var(--warn-text);
  border-radius: 6px;
  padding: 0.35rem 0.6rem;
  font-size: 0.82rem;
}
.warning[hidden] { display: none; }

.empty-hint {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
}

.delta-pos { color: var(--green); }
.delta-neg { color: var(--warn-text); }

footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 1rem;
}
footer a { color: var(--text-muted); }