/* ArcadeOwl — shared Mahjong engine styles.
   Self-contained, no external assets. Themed via CSS variables set per game. */

:root {
  --ao-bg: #0b1020;
  --ao-bg2: #0f1830;
  --ao-panel: rgba(255, 255, 255, 0.06);
  --ao-border: rgba(255, 255, 255, 0.12);
  --ao-text: #eef2ff;
  --ao-muted: #9aa6c4;
  --ao-accent: #34d399;
  --ao-accent2: #22d3ee;
  --ao-tile: #f7f4ea;
  --ao-tile-edge: #d8d2bf;
  --ao-tile-shadow: rgba(0, 0, 0, 0.35);
  --ao-good: #34d399;
  --ao-bad: #f87171;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: radial-gradient(1200px 600px at 50% -10%, var(--ao-bg2), var(--ao-bg));
  color: var(--ao-text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  -webkit-tap-highlight-color: transparent;
  overflow: hidden;
}

#ao-app {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  width: 100%;
}

/* ---- Top bar ---- */
.ao-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: linear-gradient(180deg, rgba(0,0,0,0.25), rgba(0,0,0,0));
  flex-wrap: wrap;
}
.ao-title {
  font-weight: 700;
  font-size: 15px;
  margin-right: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.2px;
}
.ao-title .ao-logo {
  display: inline-grid;
  place-items: center;
  width: 26px; height: 26px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--ao-accent), var(--ao-accent2));
  color: #06281f; font-weight: 900;
}
.ao-stat {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  min-width: 56px;
  padding: 4px 10px;
  border-radius: 10px;
  background: var(--ao-panel);
  border: 1px solid var(--ao-border);
  line-height: 1.1;
}
.ao-stat b { font-size: 15px; font-variant-numeric: tabular-nums; }
.ao-stat span { font-size: 10px; color: var(--ao-muted); text-transform: uppercase; letter-spacing: 0.6px; }

/* ---- Toolbar buttons ---- */
.ao-tools {
  display: flex;
  gap: 8px;
  padding: 6px 12px 10px;
  flex-wrap: wrap;
}
.ao-btn {
  appearance: none;
  border: 1px solid var(--ao-border);
  background: var(--ao-panel);
  color: var(--ao-text);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform 0.06s ease, background 0.15s ease, border-color 0.15s ease;
  user-select: none;
}
.ao-btn:hover { background: rgba(255,255,255,0.12); }
.ao-btn:active { transform: translateY(1px) scale(0.98); }
.ao-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.ao-btn.primary {
  background: linear-gradient(135deg, var(--ao-accent), var(--ao-accent2));
  color: #06281f;
  border-color: transparent;
}
.ao-btn .pill {
  font-size: 11px;
  background: rgba(0,0,0,0.25);
  border-radius: 999px;
  padding: 0 6px;
}

/* ---- Board ---- */
.ao-board-wrap {
  position: relative;
  flex: 1;
  overflow: hidden;
  display: grid;
  place-items: center;
  padding: 6px;
  touch-action: manipulation;
}
.ao-board {
  position: relative;
  transform-origin: center center;
}

/* ---- Tiles ---- */
.ao-tile {
  position: absolute;
  border: 0;
  margin: 0;
  padding: 0;
  cursor: pointer;
  border-radius: 8px;
  background: linear-gradient(160deg, var(--ao-tile), var(--ao-tile-edge));
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.85),
    inset 0 -3px 0 rgba(0,0,0,0.12),
    2px 3px 0 var(--ao-tile-edge),
    4px 6px 10px var(--ao-tile-shadow);
  display: grid;
  place-items: center;
  font-size: 26px;
  line-height: 1;
  color: #1b2030;
  transition: transform 0.08s ease, box-shadow 0.12s ease, opacity 0.18s ease;
  -webkit-user-select: none;
  user-select: none;
}
.ao-tile .glyph { transform: translateZ(0); pointer-events: none; }
.ao-tile.free { }
.ao-tile.blocked { filter: brightness(0.62) saturate(0.7); cursor: default; }
.ao-tile.selected {
  outline: 3px solid var(--ao-accent);
  outline-offset: -3px;
  transform: translateY(-2px) scale(1.02);
}
.ao-tile.hint {
  animation: ao-hint 0.7s ease-in-out 3;
}
.ao-tile.removing {
  opacity: 0;
  transform: scale(0.4) rotate(8deg);
  pointer-events: none;
}
.ao-tile.cursor {
  outline: 3px dashed var(--ao-accent2);
  outline-offset: -3px;
}
@keyframes ao-hint {
  0%, 100% { box-shadow: inset 0 1px 0 rgba(255,255,255,0.85), 2px 3px 0 var(--ao-tile-edge), 4px 6px 10px var(--ao-tile-shadow); }
  50% { box-shadow: 0 0 0 3px var(--ao-accent), 0 0 18px var(--ao-accent); }
}

/* connect-mode link line */
.ao-link {
  position: absolute;
  background: var(--ao-accent2);
  border-radius: 3px;
  box-shadow: 0 0 10px var(--ao-accent2);
  pointer-events: none;
  z-index: 99999;
}

/* ---- Tray (triple mode) ---- */
.ao-tray {
  display: flex;
  justify-content: center;
  gap: 6px;
  padding: 8px;
  margin: 0 8px 8px;
  background: var(--ao-panel);
  border: 1px solid var(--ao-border);
  border-radius: 14px;
  min-height: 56px;
}
.ao-slot {
  width: 40px; height: 48px;
  border-radius: 8px;
  background: rgba(0,0,0,0.25);
  display: grid;
  place-items: center;
  font-size: 24px;
}
.ao-slot.filled {
  background: linear-gradient(160deg, var(--ao-tile), var(--ao-tile-edge));
  color: #1b2030;
}

/* ---- Overlay / modal ---- */
.ao-overlay {
  position: absolute;
  inset: 0;
  display: none;
  place-items: center;
  background: rgba(6, 10, 24, 0.78);
  backdrop-filter: blur(4px);
  z-index: 100000;
  padding: 16px;
}
.ao-overlay.show { display: grid; }
.ao-modal {
  width: min(420px, 92vw);
  background: linear-gradient(180deg, var(--ao-bg2), var(--ao-bg));
  border: 1px solid var(--ao-border);
  border-radius: 18px;
  padding: 22px;
  text-align: center;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}
.ao-modal h2 { margin: 6px 0 4px; font-size: 24px; }
.ao-modal p { color: var(--ao-muted); margin: 4px 0 14px; font-size: 14px; }
.ao-modal .ao-emoji { font-size: 46px; }
.ao-modal .ao-actions { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.ao-share { display: flex; gap: 8px; justify-content: center; margin-top: 10px; }
.ao-share .ao-btn { flex: 1; }

.ao-board-list { margin: 10px 0 0; text-align: left; font-size: 13px; }
.ao-board-list div { display: flex; justify-content: space-between; padding: 4px 8px; border-radius: 8px; }
.ao-board-list div:nth-child(odd) { background: rgba(255,255,255,0.04); }
.ao-board-list b { color: var(--ao-accent); }

.ao-name-row { margin-top: 12px; }
.ao-name-row input {
  width: 100%;
  font: inherit;
  font-size: 14px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--ao-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ao-text);
  text-align: center;
}
.ao-name-row input::placeholder { color: var(--ao-muted); }

.ao-toast {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%) translateY(20px);
  background: rgba(0,0,0,0.85);
  border: 1px solid var(--ao-border);
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  pointer-events: none;
  z-index: 100001;
}
.ao-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 520px) {
  .ao-title { font-size: 13px; }
  .ao-tile { font-size: 22px; }
}