:root {
  --felt: #166534;
  --felt-dark: #14532d;
  --panel: #0f172a;
  --line: rgba(255, 255, 255, 0.18);
  --text: #f8fafc;
  --muted: #cbd5e1;
  --accent: #facc15;
  --accent-text: #1c1917;
  --danger: #f87171;
  --tile: #fdf8ec;
  --tile-edge: #d6cfbd;
  --t-black: #1f2937;
  --t-red: #dc2626;
  --t-blue: #1d4ed8;
  --t-orange: #d97706;
  --tile-w: 38px;
  --tile-h: 52px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--felt);
  color: var(--text);
  font-family: system-ui, "Microsoft JhengHei", "PingFang TC", sans-serif;
}

.hidden { display: none !important; }

/* ====== 覆蓋畫面 ====== */
.scr {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(0, 0, 0, 0.4);
}

.box {
  width: min(440px, 100%);
  max-height: 100%;
  overflow-y: auto;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  text-align: center;
}

h1 { margin: 0 0 4px; font-size: 32px; color: var(--accent); }
h2 { margin: 0 0 12px; font-size: 22px; }
.sub { margin: 8px 0; color: var(--muted); }
.code { font-family: ui-monospace, Consolas, monospace; letter-spacing: 2px; color: var(--accent); }
.or { margin: 18px 0 8px; color: var(--muted); font-size: 14px; }

.field { display: block; margin: 16px 0 4px; text-align: left; color: var(--muted); font-size: 14px; }

input {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #1e293b;
  color: var(--text);
  font: inherit;
  font-size: 16px;
}

.row { display: flex; gap: 8px; align-items: stretch; }
.row input { flex: 1; margin-top: 0; }
.row .btn { width: auto; margin-top: 0; padding: 10px 18px; }

.btn {
  display: block;
  width: 100%;
  margin-top: 12px;
  padding: 12px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-text);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.btn:disabled { opacity: 0.4; cursor: default; }
.btn.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }
.btn.small { display: inline-block; width: auto; margin: 0; padding: 8px 12px; font-size: 14px; }

.plist { margin: 16px 0; padding: 0; list-style: none; text-align: left; }
.plist li { padding: 8px 12px; border-bottom: 1px solid var(--line); }
.tag { margin-left: 6px; font-size: 12px; color: var(--accent); }
.dot { display: inline-block; width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; background: #64748b; }
.dot.on { background: #4ade80; }

/* ====== 遊戲畫面 ====== */
#scr-game { display: flex; flex-direction: column; height: 100%; }

#bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: var(--felt-dark);
  border-bottom: 1px solid var(--line);
}
#players { display: flex; flex: 1; flex-wrap: wrap; gap: 6px; }
.pchip {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  white-space: nowrap;
}
.pchip.turn { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 700; }
.pchip.off { opacity: 0.5; }
#pool { font-size: 14px; color: var(--muted); white-space: nowrap; }

#table {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 14px;
  padding: 14px;
}
.set {
  display: flex;
  gap: 3px;
  padding: 5px;
  border: 2px solid transparent;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.15);
}
.set.bad { border-color: var(--danger); }
.slot {
  width: var(--tile-w);
  height: var(--tile-h);
  border: 2px dashed var(--accent);
  border-radius: 6px;
  background: transparent;
  color: var(--accent);
  font-size: 20px;
  cursor: pointer;
}
.empty { color: var(--muted); align-self: center; }

#dock {
  padding: 8px 12px 12px;
  background: var(--felt-dark);
  border-top: 1px solid var(--line);
}
#status { min-height: 22px; margin-bottom: 6px; font-size: 15px; }
#status .warn { color: var(--danger); }
#actions { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
#rack { display: flex; flex-wrap: wrap; gap: 4px; min-height: var(--tile-h); }

/* ====== 牌 ====== */
.tile {
  position: relative;
  width: var(--tile-w);
  height: var(--tile-h);
  padding: 0;
  border: 1px solid var(--tile-edge);
  border-radius: 6px;
  background: var(--tile);
  box-shadow: 0 2px 0 var(--tile-edge);
  font: 700 20px/1 system-ui, sans-serif;
  cursor: pointer;
}
.tile.k { color: var(--t-black); }
.tile.r { color: var(--t-red); }
.tile.b { color: var(--t-blue); }
.tile.o { color: var(--t-orange); }
.tile.j { color: var(--t-red); font-size: 22px; }
.tile.new::after {
  content: '';
  position: absolute;
  top: 3px;
  right: 3px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--t-blue);
}
.tile.sel { transform: translateY(-6px); outline: 3px solid var(--accent); }
.tile { touch-action: none; -webkit-touch-callout: none; user-select: none; -webkit-user-select: none; }
.tile.dragging { opacity: 0.3; }

/* ====== 拖拉 ====== */
.drag-ghost {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  display: flex;
  gap: 3px;
  pointer-events: none;
  filter: drop-shadow(0 6px 10px rgba(0, 0, 0, 0.45));
}
.drag-ghost .tile { cursor: grabbing; }
.is-dragging, .is-dragging * { cursor: grabbing !important; user-select: none; -webkit-user-select: none; }
.set.drop, #table.drop, #rack.drop { outline: 3px dashed var(--accent); outline-offset: 2px; }
#scr-game { -webkit-user-select: none; user-select: none; }
.tile.lock { cursor: default; }

#toast {
  position: fixed;
  left: 50%;
  bottom: 30%;
  z-index: 20;
  max-width: calc(100% - 32px);
  padding: 10px 16px;
  border-radius: 8px;
  background: #7f1d1d;
  color: #fff;
  transform: translateX(-50%);
}
#toast.ok { background: #166534; border: 1px solid var(--line); }
#offline {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  padding: 6px;
  background: #b45309;
  text-align: center;
  font-size: 14px;
}

/* ====== 頭像 ====== */
.avatar {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  overflow: hidden;
  border-radius: 50%;
  background: #334155;
  font-size: 18px;
  line-height: 1;
  vertical-align: middle;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar.sm { width: 22px; height: 22px; font-size: 14px; }
.avatar.big { width: 64px; height: 64px; font-size: 40px; }
.me-row { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 16px; }
.avatar-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 12px 0; }
.avatar-grid button {
  aspect-ratio: 1;
  padding: 3px;
  border: 3px solid transparent;
  border-radius: 50%;
  background: none;
  cursor: pointer;
}
.avatar-grid button.on { border-color: var(--accent); }
.avatar-grid .avatar { width: 100%; height: 100%; font-size: clamp(24px, 8vw, 40px); }
.upload { text-align: center; }
#scr-avatar { z-index: 15; }
.plist li { display: flex; align-items: center; gap: 8px; }
.plist .dot { margin-right: 0; }
.pchip { display: inline-flex; align-items: center; gap: 6px; padding-left: 4px; }
.namecell { display: inline-flex; align-items: center; gap: 6px; }

.stats { width: 100%; margin: 12px 0; border-collapse: collapse; font-size: 15px; }
.stats td, .stats th { padding: 6px; border-bottom: 1px solid var(--line); }
.stats tr:first-child td { color: var(--muted); }
.stats .me td { color: var(--accent); }
.stats-title { margin: 20px 0 0; font-size: 16px; color: var(--muted); }
.pos { color: #4ade80; }
.neg { color: var(--danger); }

@media (max-width: 600px) {
  :root { --tile-w: 28px; --tile-h: 40px; }
  .tile { font-size: 16px; }
  #table { gap: 8px; padding: 8px; }
}