:root {
  --bg: #0f1225;
  --panel: #161a35;
  --line: #22264a;
  --text: #ececf3;
  --muted: #a7a9c2;
  --gold: #d4b25a;
  --gold-dim: rgba(212, 178, 90, 0.5);
  --error: #f0a0a0;
  --control-line: #3a3f6b;
  --control-bg: #1b1f3a;
  --on-gold: #1b1500;
  --back-top: #20265e;
  --back-bottom: #0d1033;
  --upright-bg: #243a2a;
  --upright-fg: #9fe0b0;
  --reversed-bg: #3a2424;
  --reversed-fg: #e0a09f;
  --slot-w: 84px;
  --slot-gap: 18px;
  --fly-ms: 550ms;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "PingFang TC", "Noto Sans TC", sans-serif;
}
body { min-height: 100vh; overflow-x: hidden; }

button {
  font: inherit;
  font-size: 14px;
  padding: 7px 12px;
  border-radius: 6px;
  border: 1px solid var(--control-line);
  background: var(--control-bg);
  color: var(--text);
  cursor: pointer;
}
button.primary { background: var(--gold); color: var(--on-gold); border-color: var(--gold); font-weight: 600; }
button:disabled { opacity: 0.4; cursor: default; }
button:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(6px);
  z-index: 50;
}
.topbar h1 { font-size: 16px; margin: 0; font-weight: 600; letter-spacing: 0.04em; }
.spread-name { font-weight: 400; color: var(--muted); margin-left: 6px; font-size: 14px; }
.controls { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.status { font-size: 14px; color: var(--gold); }

/* ---------- card back (CSS only) ---------- */
.back {
  background:
    radial-gradient(circle at 50% 50%, rgba(212, 178, 90, 0.55) 0 4px, transparent 5px),
    radial-gradient(circle at 50% 50%, transparent 0 9px, rgba(212, 178, 90, 0.35) 10px 11px, transparent 12px),
    repeating-linear-gradient(45deg, rgba(212, 178, 90, 0.16) 0 1.5px, transparent 1.5px 9px),
    repeating-linear-gradient(-45deg, rgba(212, 178, 90, 0.16) 0 1.5px, transparent 1.5px 9px),
    linear-gradient(var(--back-top), var(--back-bottom));
  border: 2px solid var(--gold);
  border-radius: 6px;
  box-shadow:
    inset 0 0 0 2px var(--back-bottom),
    inset 0 0 0 3px rgba(212, 178, 90, 0.6),
    0 2px 6px rgba(0, 0, 0, 0.6);
}

/* ---------- spread area ---------- */
/* 位置框尺寸：預設 --slot-w，但在窄螢幕上縮小到讓所有欄位都放得進容器寬度（容器查詢單位）。 */
.spread-area { padding: 18px 16px 10px; border-bottom: 1px solid var(--line); container-type: inline-size; }
.spread {
  --unit-w: min(var(--slot-w), calc((100cqw - (var(--cols, 1) - 1) * var(--slot-gap)) / var(--cols, 1)));
  --unit-h: calc(var(--unit-w) * 5 / 3);
  position: relative;
  margin: 0 auto;
  width: calc(var(--cols, 1) * var(--unit-w) + (var(--cols, 1) - 1) * var(--slot-gap));
  height: calc(var(--rows, 1) * var(--unit-h) + (var(--rows, 1) - 1) * var(--slot-gap) + 22px);
  max-width: 100%;
}
.slot {
  position: absolute;
  left: calc(var(--x, 0) * (var(--unit-w) + var(--slot-gap)));
  top: calc(var(--y, 0) * (var(--unit-h) + var(--slot-gap)));
  width: var(--unit-w);
  height: var(--unit-h);
  transform: rotate(var(--rot, 0deg));
}
/* 旋轉的位置框（凱爾特十字第 2 張）疊在同座標的位置之上；編號反向轉回正向。 */
.slot.rotated { z-index: 2; }
.slot.rotated .idx { transform: rotate(calc(-1 * var(--rot, 0deg))); }
.slot-btn {
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 1px dashed var(--gold-dim);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.02);
  position: relative;
  perspective: 700px;
  cursor: default;
}
.slot-btn:disabled { opacity: 1; }
.slot-btn.can-flip { cursor: pointer; }
.slot-btn.can-flip:hover .face { transform: translateY(-2px); }
.slot-btn .idx {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-dim);
  font-size: 22px;
}
.slot-btn.has-card { border-style: solid; border-color: transparent; }
.slot .label {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 5px;
  white-space: nowrap;
  /* 名稱不超出自己那一欄（含半個間距），太長以省略號截斷；完整名稱仍在翻開後的牌義與總覽裡。 */
  max-width: calc(var(--unit-w) + var(--slot-gap) - 4px);
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.3;
  text-align: center;
}
/* 旋轉 90° 的位置框：名稱反向轉回正向，落在橫牌下方、排在底下那張的名稱之後。 */
.slot.rotated .label {
  max-width: none;
  overflow: visible;
  top: 50%;
  left: calc(100% + (var(--unit-h) - var(--unit-w)) / 2 + 5px + 1.3em + 3px);
  margin: 0;
  transform-origin: 0 0;
  transform: rotate(calc(-1 * var(--rot, 0deg))) translateX(-50%);
}

/* 3D flip */
.face {
  position: absolute;
  inset: -1px;
  border-radius: 6px;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.4, 0.2, 0.2, 1);
}
.face > * {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 6px;
}
.face .front {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: rotateY(180deg);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
}
.face .front.rev { transform: rotateY(180deg) rotate(180deg); }
.slot-btn.flipped .face { transform: rotateY(180deg); }

/* ---------- readings (after flip) ---------- */
.details { max-width: 560px; margin: 18px auto 0; display: grid; gap: 14px; }
.details:empty { margin: 0; }
.reading {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
}
.reading-pos { font-size: 12px; color: var(--muted); }
.reading-name { margin: 4px 0 2px; font-size: 20px; font-weight: 600; }
.reading-en { font-size: 13px; font-weight: 400; color: var(--muted); margin-left: 8px; }
.reading-orient { display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--upright-bg); color: var(--upright-fg); }
.reading-orient.rev { background: var(--reversed-bg); color: var(--reversed-fg); }
.reading-keywords { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
.reading-keywords:empty { margin: 0; }
.reading-keywords li { font-size: 12px; padding: 2px 8px; border: 1px solid var(--gold-dim); border-radius: 999px; color: var(--gold); }
.reading-meaning { margin: 10px 0 0; font-size: 14px; line-height: 1.6; color: var(--text); }
.reading-meaning:empty { margin: 0; }

/* ---------- table (scatter grid) ---------- */
.table-area { padding: 10px 16px 40px; }
.hint { text-align: center; font-size: 12px; color: var(--muted); margin: 6px 0 10px; }
.table {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
  gap: 10px 8px;
}
.table .card {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 5;
  padding: 0;
  transform: rotate(var(--r, 0deg)) translate(var(--dx, 0px), var(--dy, 0px));
  transition: transform 0.2s, opacity 0.3s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.table .card:not(:disabled):hover,
.table .card:not(:disabled):focus-visible {
  transform: rotate(0deg) scale(1.12);
  z-index: 10;
  position: relative;
}
.table .card:disabled { opacity: 1; cursor: default; }
.table.locked .card:not(.gone) { opacity: 0.5; }
.table .card.gone { opacity: 0 !important; pointer-events: none; }

/* ---------- flying clone layer ---------- */
.flying { position: fixed; inset: 0; pointer-events: none; z-index: 500; }
.flying .card {
  position: absolute;
  transition: all var(--fly-ms) cubic-bezier(0.3, 0.7, 0.3, 1);
}

@media (max-width: 480px) {
  :root { --slot-w: 76px; }
  .topbar h1 { font-size: 15px; }
  .table { grid-template-columns: repeat(auto-fill, minmax(58px, 1fr)); }
}

/* ---------- screens: home / setup / summary ---------- */
.screen[hidden] { display: none; }
.screen-title { font-size: 20px; font-weight: 600; margin: 0 0 6px; }
.screen-lead { margin: 0 0 18px; color: var(--muted); font-size: 14px; line-height: 1.6; }

#screen-home, #screen-setup { max-width: 640px; margin: 0 auto; padding: 28px 16px 48px; }

.spread-list { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.spread-card {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "name count" "desc desc";
  gap: 6px 10px;
  text-align: left;
  padding: 16px;
  border-radius: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  transition: border-color 0.15s, transform 0.15s;
}
.spread-card:hover, .spread-card:focus-visible { border-color: var(--gold); transform: translateY(-2px); }
.spread-card-name { grid-area: name; font-size: 18px; font-weight: 600; }
.spread-card-count { grid-area: count; align-self: start; font-size: 12px; color: var(--gold); border: 1px solid var(--gold-dim); border-radius: 999px; padding: 2px 8px; }
.spread-card-desc { grid-area: desc; font-size: 13px; color: var(--muted); line-height: 1.5; }

.setup { display: grid; gap: 18px; }
.field { display: grid; gap: 6px; }
.field-label { font-size: 14px; font-weight: 600; }
.field-help { font-size: 12px; color: var(--muted); }
.field input[type="text"],
.field input[type="password"],
.field select {
  font: inherit;
  font-size: 16px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--control-line);
  background: var(--control-bg);
  color: var(--text);
  width: 100%;
}
.field input[type="text"]:focus-visible,
.field input[type="password"]:focus-visible,
.field select:focus-visible { outline: 2px solid var(--gold); outline-offset: 1px; }
.field-error { font-size: 12px; color: var(--error); }
.switch {
  grid-template-columns: auto 1fr;
  grid-template-areas: "box label" "box help";
  align-items: center;
  gap: 2px 12px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  cursor: pointer;
}
.switch input { grid-area: box; width: 20px; height: 20px; margin: 0; accent-color: var(--gold); cursor: pointer; }
.switch .field-label { grid-area: label; }
.switch .field-help { grid-area: help; }
.option-fields { display: grid; gap: 12px; margin: 0; padding: 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--panel); }
.option-fields[hidden] { display: none; }
.option-fields legend { padding: 0 4px; color: var(--muted); font-weight: 500; }
.setup-actions { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }

.question {
  margin: 0;
  padding: 10px 16px;
  text-align: center;
  font-size: 14px;
  color: var(--gold);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 60%, transparent);
}

.summary { max-width: 560px; margin: 0 auto; padding: 22px 16px 48px; }
.summary-question { margin: 0 0 14px; color: var(--gold); font-size: 14px; }
.summary-list { list-style: none; margin: 0 0 18px; padding: 0; display: grid; gap: 8px; }
.summary-item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "pos orient" "card orient";
  align-items: center;
  gap: 2px 10px;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
}
.summary-pos { grid-area: pos; font-size: 12px; color: var(--muted); }
.summary-card { grid-area: card; font-size: 16px; font-weight: 600; }
.summary-en { font-size: 12px; font-weight: 400; color: var(--muted); margin-left: 8px; }
.summary-item .reading-orient { grid-area: orient; }

/* ---------- AI 解牌（總覽裡） ---------- */
.ai { display: grid; gap: 14px; margin: 0 0 18px; }
.ai-text { margin: 0; font-size: 15px; line-height: 1.8; white-space: pre-line; }
.ai-text:empty { display: none; }
.ai-thinking { margin: 0; font-size: 14px; color: var(--muted); }
/* Idle: out of the grid flow (no gap) but not display:none, so the status label stays in the accessibility tree. */
.ai-thinking.idle { position: absolute; }
.ai-elapsed { margin-left: 8px; font-variant-numeric: tabular-nums; }
.ai-error { margin: 0; font-size: 14px; color: var(--error); }

/* ---------- 設定對話框 ---------- */
.dialog {
  width: min(560px, calc(100vw - 32px));
  margin: auto;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
}
.dialog::backdrop { background: rgba(5, 7, 20, 0.7); }
/* key 欄位與「清除」同一列；窄螢幕時輸入框縮、按鈕不縮 */
.key-row { display: flex; gap: 8px; }
.key-row input { flex: 1; min-width: 0; }
.key-row button { flex: none; }