*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface-2: #243044;
  --border: #3d4f6f;
  --text: #e8edf5;
  --text-muted: #8fa3bf;
  --success: #3dd68c;
  --success-bg: rgba(61, 214, 140, 0.18);
  --fail: #ff6b6b;
  --fail-bg: rgba(255, 107, 107, 0.18);
  --accent: #7eb8ff;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --radius: 12px;
  --row-label-width: 36px;
  --cell-width: clamp(40px, 8vw, 62px);
  --cell-height: clamp(28px, 4.2vw, 44px);
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
  background:
    radial-gradient(ellipse at top, #1e2a3d 0%, var(--bg) 55%),
    var(--bg);
  color: var(--text);
}

.app {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.header {
  margin-bottom: 24px;
}

.header__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.lang-toggle {
  flex-shrink: 0;
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--accent);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.lang-toggle:hover {
  border-color: var(--accent);
  background: var(--surface-2);
}

.header__title h1 {
  margin: 0 0 4px;
  font-size: clamp(1.5rem, 4vw, 2rem);
  letter-spacing: 0.02em;
}

.subtitle {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.legend__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
}

.legend__item::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid var(--border);
}

.legend__item--success::before {
  background: var(--success-bg);
  border-color: var(--success);
}

.legend__item--fail::before {
  background: var(--fail-bg);
  border-color: var(--fail);
}

.legend__item--empty::before {
  background: var(--surface-2);
}

.room-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 20px;
}

.room-tab {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 12px 8px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
  font-size: 0.95rem;
  font-weight: 600;
}

.room-tab:hover {
  border-color: var(--accent);
}

.room-tab.active {
  background: linear-gradient(180deg, #2a4060, var(--surface));
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(126, 184, 255, 0.25);
}

.room-tab__badge {
  display: block;
  margin-top: 4px;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-muted);
}

.main {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.room-panel__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.room-panel__header h2 {
  margin: 0;
  font-size: 1.25rem;
}

.room-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.stat {
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
}

.stat--success {
  color: var(--success);
  border-color: rgba(61, 214, 140, 0.4);
}

.stat--fail {
  color: var(--fail);
  border-color: rgba(255, 107, 107, 0.4);
}

.grid-wrapper {
  width: 100%;
  overflow-x: hidden;
  padding-bottom: 8px;
}

.grid-labels--top {
  display: grid;
  grid-template-columns: var(--row-label-width) repeat(4, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 6px;
  padding-left: 0;
  width: 100%;
}

.grid-labels--top span,
.grid-labels--left span {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  user-select: none;
}

.grid-body {
  display: grid;
  grid-template-columns: var(--row-label-width) minmax(0, 1fr);
  gap: 6px;
  width: 100%;
}

.grid-labels--left {
  display: grid;
  grid-template-rows: repeat(10, var(--cell-height));
  gap: 6px;
  width: var(--row-label-width);
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: repeat(10, var(--cell-height));
  gap: 6px;
  width: 100%;
}

.platform-cell {
  appearance: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: linear-gradient(180deg, #2c3a50 0%, #1f2a3a 100%);
  cursor: pointer;
  position: relative;
  transition: transform 0.08s, border-color 0.12s, box-shadow 0.12s;
  padding: 0;
}

.platform-cell:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.platform-cell:active {
  transform: translateY(0);
}

.platform-cell--success {
  background: var(--success-bg);
  border-color: var(--success);
  box-shadow: inset 0 0 12px rgba(61, 214, 140, 0.15);
}

.platform-cell--success::after {
  content: "✓";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--success);
  font-size: 1rem;
  font-weight: 700;
}

.platform-cell--fail {
  background: var(--fail-bg);
  border-color: var(--fail);
  box-shadow: inset 0 0 12px rgba(255, 107, 107, 0.15);
}

.platform-cell--fail::after {
  content: "✕";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fail);
  font-size: 0.95rem;
  font-weight: 700;
}

.room-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn--secondary {
  background: var(--surface-2);
  color: var(--text);
}

.btn--secondary:hover {
  border-color: var(--accent);
}

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
}

.btn--ghost:hover {
  color: var(--text);
  border-color: var(--accent);
}

.footer {
  margin-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer p {
  margin: 0 0 12px;
}

.footer-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

@media (max-width: 520px) {
  .legend__item {
    width: 100%;
    justify-content: flex-start;
  }

  .room-panel__header {
    flex-direction: column;
    align-items: flex-start;
  }
}