/* 我的資科教室：介面樣式
 * 黑板綠頂列、方格紙畫布、螢光黃為唯一強調色
 */
:root {
  --board: #1d3b33;
  --board-2: #275046;
  --paper: #f3f6f1;
  --paper-2: #e7ece5;
  --grid-line: #d5ddd6;
  --ink: #1c2421;
  --ink-2: #56625d;
  --hl: #ffd23f;
  --hl-ink: #3d3100;
  --blue: #3a7bd5;
  --red: #e5484d;
  --panel-w: 344px;
  --top-h: 56px;
  --radius-s: 8px;
  --radius-m: 12px;
  --font: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font: 15px/1.55 var(--font);
  color: var(--ink);
  background: var(--paper);
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--panel-w);
  grid-template-rows: var(--top-h) minmax(0, 1fr);
  grid-template-areas: "top top" "stage panel";
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; color: inherit; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 3px solid var(--hl); outline-offset: 2px; }

/* ---------- 頂列 ---------- */
.topbar {
  grid-area: top;
  display: flex; align-items: center; gap: 16px;
  padding: 0 16px;
  background: var(--board);
  color: #eaf2ee;
  position: relative; z-index: 5;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; flex: 1; }
.logo {
  flex: none;
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--hl); color: var(--board);
  display: grid; place-items: center;
  font: 800 13px/1 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  box-shadow: 0 3px 0 #b8930b;
}
.room-name input {
  font: 900 19px/1.2 var(--font);
  letter-spacing: 0.02em;
  color: #fff; background: transparent;
  border: 0; border-bottom: 2px dashed transparent;
  padding: 4px 2px; width: min(340px, 40vw);
  border-radius: 0;
}
.room-name input:hover { border-bottom-color: rgba(255,255,255,.3); }
.room-name input:focus { outline: none; border-bottom-color: var(--hl); }
.save-state { margin: 0; font-size: 13px; color: #b9cdc5; white-space: nowrap; }
.save-state::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 7px; background: #7fa596; vertical-align: 1px; }
.save-state[data-state="saved"]::before { background: #6fe39a; }
.save-state[data-state="saving"]::before, .save-state[data-state="pending"]::before { background: var(--hl); }
.save-state[data-state="error"] { color: #ffb4b4; }
.save-state[data-state="error"]::before { background: var(--red); }
.account { position: relative; display: flex; align-items: center; min-height: 40px; }
.user-chip {
  display: flex; align-items: center; gap: 8px;
  background: var(--board-2); border: 1px solid rgba(255,255,255,.12);
  padding: 4px 12px 4px 4px; border-radius: 999px; cursor: pointer; color: #fff;
}
.user-chip img, .user-chip .ava { width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center; background: var(--hl); color: var(--board); font-weight: 900; }
.uname { max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 500; }
.user-menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: #fff; color: var(--ink); border-radius: var(--radius-m);
  box-shadow: 0 10px 30px rgba(0,0,0,.18); padding: 12px; min-width: 220px;
}
.user-menu .umail { margin: 0 0 10px; font-size: 13px; color: var(--ink-2); word-break: break-all; }
.user-menu button, .user-menu .ubtn { display: block; width: 100%; padding: 8px; margin-top: 6px; border: 1px solid var(--grid-line); background: var(--paper); border-radius: var(--radius-s); cursor: pointer; text-align: center; color: var(--ink); text-decoration: none; font-size: 14px; }
.user-menu .uclass { margin: 0 0 4px; font-size: 13px; font-weight: 700; }
.user-menu .ubtn { background: var(--board); color: #fff; border-color: var(--board); }
.guest-tag { font-size: 13px; padding: 4px 10px; border-radius: 999px; background: var(--board-2); }

/* ---------- 畫布 ---------- */
.stage {
  grid-area: stage;
  position: relative; overflow: hidden;
  background-color: #e9efea;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  touch-action: none;
}
#view { position: absolute; inset: 0; display: block; cursor: grab; }
.stage.placing #view { cursor: crosshair; }
.loading { position: absolute; inset: 0; display: grid; place-items: center; color: var(--ink-2); font-weight: 500; }

.toolbar {
  position: absolute; left: 16px; bottom: 16px;
  display: flex; align-items: center; gap: 4px;
  background: #fff; border-radius: var(--radius-m);
  padding: 5px; box-shadow: 0 2px 0 var(--grid-line), 0 8px 20px rgba(29,59,51,.12);
}
.toolbar button {
  display: flex; align-items: center; gap: 6px;
  min-width: 38px; height: 38px; padding: 0 10px; justify-content: center;
  border: 0; background: transparent; border-radius: var(--radius-s); cursor: pointer; font-weight: 500;
}
.toolbar button:hover:not(:disabled) { background: var(--paper-2); }
.toolbar button:disabled { opacity: .35; cursor: default; }
.toolbar svg, .sel-actions svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.toolbar .sep { width: 1px; height: 22px; background: var(--grid-line); margin: 0 2px; }
#btnMode[aria-pressed="true"] { background: var(--board); color: #fff; }

.slots {
  position: absolute; right: 16px; bottom: 16px;
  display: flex; align-items: center; gap: 4px;
  background: #fff; border-radius: var(--radius-m); padding: 5px 5px 5px 12px;
  box-shadow: 0 2px 0 var(--grid-line), 0 8px 20px rgba(29,59,51,.12);
  font-size: 13px; color: var(--ink-2);
}
.slots span { margin-right: 4px; }
.slots button { width: 34px; height: 34px; border: 0; border-radius: var(--radius-s); background: transparent; cursor: pointer; font-weight: 700; }
.slots button:hover { background: var(--paper-2); }
.slots button.on { background: var(--hl); color: var(--hl-ink); }

.sel-pop {
  position: absolute; left: 0; top: 0; z-index: 4;
  background: #fff; border-radius: var(--radius-m);
  box-shadow: 0 2px 0 var(--grid-line), 0 12px 28px rgba(29,59,51,.2);
  padding: 8px; min-width: 220px;
  transition: transform .08s linear;
}
.sel-pop::after {
  content: ""; position: absolute; left: 50%; bottom: -6px; width: 12px; height: 12px;
  background: #fff; transform: translateX(-50%) rotate(45deg);
}
.sel-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 2px 6px 8px; }
.sel-head b { font-size: 15px; }
.style-dot { font-size: 12px; color: var(--ink-2); display: flex; align-items: center; gap: 5px; white-space: nowrap; }
.style-dot::before { content: ""; width: 9px; height: 9px; border-radius: 3px; background: var(--sc); }
.sel-actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; position: relative; z-index: 1; }
.sel-actions button {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 7px 4px; border: 0; background: var(--paper); border-radius: var(--radius-s);
  cursor: pointer; font-size: 13px; font-weight: 500;
}
.sel-actions button:hover:not(:disabled) { background: var(--paper-2); }
.sel-actions button:disabled { opacity: .35; }
.sel-actions .danger { color: #b3261e; }
.sel-actions .danger:hover { background: #fdecec; }

.hint {
  position: absolute; left: 50%; top: 16px; transform: translateX(-50%);
  margin: 0; padding: 8px 16px; border-radius: 999px;
  background: var(--board); color: #fff; font-size: 14px; font-weight: 500;
  box-shadow: 0 6px 18px rgba(29,59,51,.25); white-space: nowrap;
}

/* ---------- 器材目錄 ---------- */
.panel {
  grid-area: panel;
  background: var(--paper);
  border-left: 1px solid var(--grid-line);
  display: flex; flex-direction: column; min-height: 0;
  position: relative; z-index: 3;
}
.panel-toggle { display: none; }
.panel-head { padding: 18px 18px 10px; }
.panel-head h2 { margin: 0; font-size: 18px; font-weight: 900; }
.panel-head p { margin: 4px 0 0; font-size: 13px; color: var(--ink-2); }
.tabs { display: flex; flex-wrap: wrap; gap: 6px; padding: 4px 18px 12px; }
.tab {
  border: 1px solid var(--grid-line); background: #fff;
  padding: 5px 12px; border-radius: 999px; cursor: pointer; font-size: 14px;
}
.tab:hover { border-color: #b9c6bd; }
.tab.on { background: var(--board); border-color: var(--board); color: #fff; font-weight: 700; }
.grid {
  flex: 1; overflow-y: auto; min-height: 0;
  padding: 2px 18px 16px;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; align-content: start;
}
.card {
  display: flex; flex-direction: column; text-align: left;
  border: 2px solid transparent; background: #fff; border-radius: var(--radius-m);
  padding: 6px 6px 10px; cursor: pointer;
  box-shadow: 0 1px 0 var(--grid-line);
}
.card:hover { border-color: #c9d5cc; }
.card.on { border-color: var(--hl); background: #fffbe8; }
.thumb {
  display: block; border-radius: var(--radius-s);
  background-color: #eef2ee;
  background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 12px 12px;
  aspect-ratio: 132 / 104;
}
.thumb img { width: 100%; height: 100%; display: block; }
.cname { font-weight: 700; font-size: 14px; margin: 8px 4px 2px; line-height: 1.3; }
.cmeta { display: flex; align-items: center; gap: 5px; margin: 0 4px; font-size: 12px; color: var(--ink-2); flex-wrap: wrap; }
.cmeta i { width: 8px; height: 8px; border-radius: 2px; background: var(--sc); }
.csize::before { content: "・"; }

.grid.look { display: block; }
.look-sec h3 { font-size: 14px; margin: 6px 0 8px; }
.swatches { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-bottom: 16px; }
.swatch {
  display: flex; align-items: center; gap: 10px;
  padding: 8px; border: 2px solid transparent; border-radius: var(--radius-m);
  background: #fff; cursor: pointer; font-size: 14px; text-align: left;
  box-shadow: 0 1px 0 var(--grid-line);
}
.swatch .chip { width: 32px; height: 32px; border-radius: 7px; flex: none; box-shadow: inset 0 0 0 1px rgba(0,0,0,.08); }
.swatch.on { border-color: var(--hl); background: #fffbe8; font-weight: 700; }

.room-info { border-top: 1px solid var(--grid-line); padding: 14px 18px 18px; background: #fff; }
.ri-head { display: flex; justify-content: space-between; align-items: baseline; }
.ri-head h3 { margin: 0; font-size: 14px; }
.ri-head span { font-size: 12px; color: var(--ink-2); }
.style-bar { display: flex; height: 10px; border-radius: 5px; overflow: hidden; background: var(--paper-2); margin: 10px 0 6px; gap: 2px; }
.style-legend { list-style: none; margin: 0 0 10px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 12px; color: var(--ink-2); }
.style-legend li { display: flex; align-items: center; gap: 5px; }
.style-legend i { width: 8px; height: 8px; border-radius: 2px; }
.room-stats { margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px; }
.room-stats div { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 8px; }
.room-stats dt { font-size: 12px; color: var(--ink-2); }
.room-stats dd { margin: 0; display: flex; align-items: center; gap: 6px; }
.room-stats b { font-size: 13px; min-width: 18px; text-align: right; }
.meter { flex: 1; height: 6px; border-radius: 3px; background: var(--paper-2); overflow: hidden; }
.meter span { display: block; height: 100%; background: var(--board-2); border-radius: 3px; }

/* ---------- 參觀模式 ---------- */
body.visit .panel, body.visit .slots { display: none; }
body.visit { grid-template-columns: 1fr 0; }

/* ---------- 歡迎畫面 ---------- */
.welcome {
  position: fixed; inset: 0; z-index: 20;
  display: grid; place-items: center; padding: 16px;
  background: rgba(29,59,51,.45);
  backdrop-filter: blur(3px);
}
.welcome[hidden] { display: none; }
.welcome-card {
  width: min(420px, 100%);
  background: var(--paper); border-radius: 18px;
  padding: 32px 28px 24px; text-align: center;
  box-shadow: 0 4px 0 #c9d4cc, 0 30px 60px rgba(0,0,0,.25);
}
.w-logo {
  width: 64px; height: 64px; border-radius: 16px; margin: 0 auto 14px;
  background: var(--hl); color: var(--board);
  display: grid; place-items: center;
  font: 800 22px/1 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  box-shadow: 0 5px 0 #b8930b;
}
.welcome h1 { margin: 0; font-size: 28px; font-weight: 900; letter-spacing: .03em; }
.w-lead { color: var(--ink-2); margin: 8px 0 22px; }
.w-google { display: flex; justify-content: center; min-height: 44px; }
.w-note { font-size: 13px; color: var(--ink-2); background: var(--paper-2); padding: 8px 12px; border-radius: var(--radius-s); }
.btn-guest {
  margin-top: 12px; width: 280px; max-width: 100%;
  padding: 10px; border-radius: 999px; cursor: pointer; font-weight: 700;
  background: #fff; border: 1px solid #c9d4cc;
}
.btn-guest:hover { background: var(--paper-2); }
.w-small { font-size: 12px; color: var(--ink-2); margin: 16px 0 0; }

/* ---------- 提示訊息 ---------- */
.toast {
  position: fixed; left: 50%; bottom: 84px; z-index: 30;
  transform: translate(-50%, 16px); opacity: 0; pointer-events: none;
  background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 999px;
  font-size: 14px; font-weight: 500; transition: opacity .18s, transform .18s;
  max-width: calc(100vw - 32px); text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.warn { background: #8a1c1c; }

/* ---------- 手機 ---------- */
@media (max-width: 760px) {
  :root { --top-h: 52px; }
  body { grid-template-columns: minmax(0, 1fr); grid-template-areas: "top" "stage"; }
  .topbar { gap: 10px; padding: 0 10px; }
  .room-name input { font-size: 16px; width: 44vw; }
  .save-state { display: none; }
  .uname { display: none; }
  .user-chip { padding: 3px; }
  .panel {
    position: fixed; left: 0; right: 0; bottom: 0; height: 46vh;
    border-left: 0; border-top: 1px solid var(--grid-line);
    border-radius: 16px 16px 0 0; box-shadow: 0 -10px 30px rgba(29,59,51,.18);
    transition: transform .22s ease;
  }
  .panel.collapsed { transform: translateY(calc(100% - 58px)); }
  .panel-toggle {
    display: block; position: absolute; left: 0; right: 0; top: 0; height: 26px;
    border: 0; background: transparent; cursor: pointer;
  }
  .panel-toggle span { display: block; width: 44px; height: 5px; border-radius: 3px; background: #c4cec7; margin: 9px auto 0; }
  .panel-head { padding: 22px 16px 6px; }
  .panel-head p { display: none; }
  .tabs { flex-wrap: nowrap; overflow-x: auto; padding: 4px 16px 10px; }
  .tab { flex: none; }
  .grid { grid-template-columns: repeat(3, 1fr); padding: 2px 16px 16px; }
  .room-info { display: none; }
  .toolbar { left: 10px; bottom: calc(58px + 10px); }
  .toolbar #btnUndo span { display: none; }
  .slots { right: 10px; top: 10px; bottom: auto; }
  .slots span { display: none; }
  .slots button { width: 30px; height: 30px; }
  .panel:not(.collapsed) ~ .toast { bottom: calc(46vh + 16px); }
  .hint { top: 60px; font-size: 13px; white-space: normal; text-align: center; width: max-content; max-width: calc(100% - 24px); }
  body.visit .panel { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

/* =========================================================
   v0.3：頂列學習按鈕、等級、金幣晶片
   ========================================================= */
.ic-coin, .ic-chip { display: inline-block; width: 16px; height: 16px; vertical-align: -3px; background: center / contain no-repeat; flex: none; }
.ic-coin { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Ccircle cx='8' cy='8' r='7' fill='%23ffd23f' stroke='%23b8930b' stroke-width='1.4'/%3E%3Ccircle cx='8' cy='8' r='4' fill='none' stroke='%23d9a900' stroke-width='1.2'/%3E%3C/svg%3E"); }
.ic-chip { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M5 1v2M8 1v2M11 1v2M5 13v2M8 13v2M11 13v2M1 5h2M1 8h2M1 11h2M13 5h2M13 8h2M13 11h2' stroke='%231d6b45' stroke-width='1.4'/%3E%3Crect x='3' y='3' width='10' height='10' rx='2' fill='%232e9b5f'/%3E%3Crect x='5.5' y='5.5' width='5' height='5' rx='1' fill='%239fe0b9'/%3E%3C/svg%3E"); }

.top-actions { display: flex; gap: 6px; }
.top-btn {
  display: flex; align-items: center; gap: 6px; height: 38px; padding: 0 14px;
  border-radius: 999px; border: 1px solid rgba(255,255,255,.18); background: transparent; color: #fff;
  cursor: pointer; font-weight: 700; white-space: nowrap;
}
.top-btn:hover { background: var(--board-2); }
.top-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.top-btn.go-learn { background: var(--hl); color: var(--hl-ink); border-color: var(--hl); box-shadow: 0 3px 0 #b8930b; }
.top-btn.go-learn:hover { background: #ffdc66; }
.top-btn.go-learn:active { transform: translateY(2px); box-shadow: 0 1px 0 #b8930b; }

.hud {
  display: flex; align-items: center; gap: 12px; height: 40px; padding: 0 12px;
  border: 1px solid rgba(255,255,255,.12); background: var(--board-2); color: #fff;
  border-radius: 999px; cursor: pointer;
}
.hud[hidden] { display: none; }
.hud-lv { display: grid; gap: 3px; min-width: 64px; }
.hud-lv b { font-size: 13px; line-height: 1; }
.hud-lv b.pop { animation: pop .6s ease; }
@keyframes pop { 40% { transform: scale(1.5); color: var(--hl); } }
.hud-bar { height: 5px; border-radius: 3px; background: rgba(255,255,255,.18); overflow: hidden; }
.hud-bar span { display: block; height: 100%; width: 0; background: var(--hl); border-radius: 3px; transition: width .4s ease; }
.hud-cur { display: flex; align-items: center; gap: 5px; font-variant-numeric: tabular-nums; }
.hud-cur b { font-size: 14px; }

/* 目錄卡片：價格與背包 */
.cshop { display: flex; justify-content: space-between; align-items: center; margin: 6px 4px 0; font-size: 12px; }
.cshop .price { display: flex; align-items: center; gap: 3px; font-weight: 700; }
.cshop .own { color: var(--ink-2); }
.cshop .own.has { color: #1d6b45; font-weight: 700; }
.cshop .lock { color: var(--ink-2); background: var(--paper-2); padding: 1px 8px; border-radius: 999px; }
.card.locked .thumb img { filter: grayscale(1) opacity(.5); }
.card.locked .cname { color: var(--ink-2); }
.ri-tip { margin: 2px 0 0; font-size: 12px; color: var(--ink-2); }

.look-sec.expand .ex-now { margin: 0 0 8px; font-size: 14px; }
.ex-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px; width: 100%;
  padding: 10px; border-radius: var(--radius-m); border: 0; cursor: pointer; font-weight: 700;
  background: var(--board); color: #fff;
}
.ex-btn .price { display: flex; align-items: center; gap: 3px; background: rgba(255,255,255,.15); padding: 2px 8px; border-radius: 999px; }
.ex-btn:disabled { opacity: .45; cursor: not-allowed; }
.look-sec.expand small { display: block; margin-top: 6px; color: var(--ink-2); font-size: 12px; }

.w-msg { background: #fffbe8; border: 1px solid #f2dc8a; color: var(--hl-ink); padding: 8px 12px; border-radius: var(--radius-s); font-size: 14px; }

/* 購買視窗 */
.buy { border: 0; border-radius: 18px; padding: 0; width: min(440px, calc(100vw - 32px)); box-shadow: 0 30px 60px rgba(0,0,0,.25); color: var(--ink); }
.buy::backdrop { background: rgba(29,59,51,.45); }
.buy[open] { display: grid; grid-template-columns: 160px 1fr; }
.b-pic { width: 160px; height: 100%; min-height: 150px; object-fit: contain; background: #eef2ee; background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px); background-size: 12px 12px; }
.b-info { padding: 18px 18px 6px; display: grid; gap: 6px; align-content: start; }
.b-info h3 { margin: 0; font-size: 18px; }
.b-stats { list-style: none; padding: 0; margin: 2px 0; display: flex; flex-wrap: wrap; gap: 4px; }
.b-stats li { font-size: 12px; background: var(--paper-2); padding: 2px 8px; border-radius: 999px; }
.b-row { display: flex; justify-content: space-between; align-items: center; font-size: 14px; }
.b-row b { display: flex; align-items: center; gap: 4px; font-size: 16px; }
.b-step { display: flex; align-items: center; gap: 10px; }
.b-step button { width: 30px; height: 30px; border-radius: 50%; border: 1px solid var(--grid-line); background: #fff; cursor: pointer; font-size: 16px; }
.b-have { color: var(--ink-2); }
.b-actions { grid-column: 1 / -1; display: flex; gap: 8px; padding: 12px 18px 18px; justify-content: flex-end; }
.b-actions button { padding: 10px 18px; border-radius: 999px; border: 1px solid var(--grid-line); background: #fff; font-weight: 700; cursor: pointer; }
.b-actions .b-buy { background: var(--hl); border-color: var(--hl); color: var(--hl-ink); box-shadow: 0 3px 0 #b8930b; }
.b-actions .b-buy:disabled { background: var(--paper-2); border-color: var(--grid-line); color: var(--ink-2); box-shadow: none; cursor: not-allowed; }

/* =========================================================
   上課畫面
   ========================================================= */
.learn {
  position: fixed; left: 0; right: 0; top: var(--top-h); bottom: 0; z-index: 12;
  display: grid; grid-template-rows: auto 1fr auto;
  background-color: var(--paper);
}
.learn[hidden] { display: none; }
.l-head { display: flex; align-items: center; gap: 12px; padding: 10px 20px; border-bottom: 1px solid var(--grid-line); background: #fff; }
.l-title { flex: 1; margin: 0; font-size: 18px; font-weight: 900; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.l-back, .l-close { border: 1px solid var(--grid-line); background: #fff; border-radius: 999px; padding: 6px 14px; cursor: pointer; font-weight: 700; }
.l-back[hidden] { display: none; }
.l-body { overflow-y: auto; padding: 20px; }
.l-body > * { max-width: 980px; margin-left: auto; margin-right: auto; }
.l-foot { display: flex; justify-content: flex-end; gap: 10px; padding: 12px 20px; border-top: 1px solid var(--grid-line); background: #fff; flex-wrap: wrap; }
.l-foot[hidden] { display: none; }
.l-btn { padding: 10px 20px; border-radius: 999px; border: 1px solid var(--grid-line); background: #fff; font-weight: 700; cursor: pointer; display: inline-flex; align-items: center; gap: 4px; }
.l-btn.primary { background: var(--board); border-color: var(--board); color: #fff; }
.l-btn:disabled { opacity: .45; cursor: not-allowed; }
.l-loading, .l-error { color: var(--ink-2); text-align: center; padding: 40px 0; }
.l-error { color: #b3261e; }
.l-tabs { display: flex; gap: 6px; margin-bottom: 18px; }
.l-tab { border: 1px solid var(--grid-line); background: #fff; padding: 7px 16px; border-radius: 999px; cursor: pointer; font-weight: 500; }
.l-tab.on { background: var(--board); border-color: var(--board); color: #fff; font-weight: 700; }
.l-sub { font-size: 16px; margin: 20px 0 10px; }

.l-daily {
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 20px;
  background: #fff; border-radius: 16px; padding: 16px 20px; margin-bottom: 24px;
  box-shadow: 0 2px 0 var(--grid-line);
}
.d-streak { display: grid; justify-items: center; padding-right: 20px; border-right: 1px solid var(--grid-line); }
.d-streak b { font-size: 34px; line-height: 1; font-weight: 900; color: #d9480f; }
.d-streak span { font-size: 13px; font-weight: 700; }
.d-streak small { font-size: 12px; color: var(--ink-2); }
.d-main h3 { margin: 0 0 6px; font-size: 15px; }
.d-tasks { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; font-size: 14px; }
.d-tasks li { display: flex; align-items: center; gap: 8px; }
.d-tasks i { width: 16px; height: 16px; border-radius: 50%; border: 2px solid #b9c6bd; flex: none; }
.d-tasks li.done { color: var(--ink-2); text-decoration: line-through; }
.d-tasks li.done i { background: #2e9b5f; border-color: #2e9b5f; }

.l-grade { margin-bottom: 26px; }
.l-grade h3 { font-size: 16px; margin: 0 0 10px; display: flex; align-items: center; gap: 10px; }
.l-grade h3::after { content: ""; flex: 1; height: 1px; background: var(--grid-line); }
.l-units { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.l-unit {
  text-align: left; display: grid; gap: 6px; align-content: start;
  padding: 14px; border-radius: 14px; border: 2px solid transparent; background: #fff; cursor: pointer;
  box-shadow: 0 2px 0 var(--grid-line);
}
.l-unit:hover:not(:disabled) { border-color: #c9d5cc; }
.l-unit.open { border-color: var(--hl); }
.l-unit.done { background: #f2faf5; }
.l-unit:disabled { cursor: default; opacity: .62; }
.l-unit h4 { margin: 0; font-size: 16px; }
.u-top { display: flex; justify-content: space-between; gap: 6px; font-size: 12px; }
.u-cat { color: var(--ink-2); }
.u-status { font-weight: 700; padding: 1px 8px; border-radius: 999px; background: var(--paper-2); white-space: nowrap; }
.l-unit.open .u-status { background: var(--hl); color: var(--hl-ink); }
.l-unit.done .u-status { background: #2e9b5f; color: #fff; }
.u-code, .u-mini { margin: 0; font-size: 12px; color: var(--ink-2); }
.u-prog { display: grid; gap: 3px; }
.u-prog small { font-size: 12px; color: var(--ink-2); }
.bar { display: block; height: 6px; border-radius: 3px; background: var(--paper-2); overflow: hidden; }
.bar > span { display: block; height: 100%; background: #2e9b5f; border-radius: 3px; }
.u-reward { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.u-reward img { width: 44px; height: 36px; background: #f0f4f0; border-radius: 6px; }
.u-reward small { font-size: 12px; color: var(--ink-2); }
.u-chips { display: flex; align-items: center; gap: 2px; font-weight: 700; color: var(--ink) !important; }

.u-intro { background: #fff; border-radius: 14px; padding: 16px 18px; margin-bottom: 16px; box-shadow: 0 2px 0 var(--grid-line); }
.u-intro p { margin: 0; }
.u-intro .u-code { margin-bottom: 4px; }
.u-acts { display: grid; gap: 10px; }
.u-act { display: grid; grid-template-columns: 40px 1fr auto; gap: 14px; align-items: center; background: #fff; border-radius: 14px; padding: 12px 16px; box-shadow: 0 2px 0 var(--grid-line); }
.a-num { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; font-weight: 900; background: var(--paper-2); }
.u-act.passed .a-num { background: #2e9b5f; color: #fff; }
.a-main h4 { margin: 2px 0; font-size: 16px; }
.a-main p { margin: 0; font-size: 13px; color: var(--ink-2); }
.a-type { font-size: 12px; font-weight: 700; color: #2f6a5a; }
.a-side { display: grid; justify-items: end; gap: 6px; }
.a-side small { font-size: 12px; color: var(--ink-2); display: flex; align-items: center; gap: 3px; }

/* 結果 */
.a-result { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: center; padding: 18px 20px; border-radius: 16px; margin-bottom: 18px; background: #fff; box-shadow: 0 2px 0 var(--grid-line); }
.a-result[hidden] { display: none; }
.a-result.pass { background: #f2faf5; box-shadow: 0 2px 0 #bfe5cf; }
.res-score { width: 96px; height: 96px; border-radius: 50%; display: grid; place-items: center; align-content: center; background: #fff; border: 6px solid #2e9b5f; }
.a-result.fail .res-score { border-color: #e0a100; }
.res-score b { font-size: 32px; line-height: 1; font-weight: 900; }
.res-score span { font-size: 12px; color: var(--ink-2); }
.res-main h3 { margin: 0 0 8px; font-size: 20px; }
.res-gain { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.res-gain > span { display: inline-flex; align-items: center; gap: 4px; background: #fff; padding: 4px 12px; border-radius: 999px; font-weight: 900; box-shadow: 0 1px 0 var(--grid-line); }
.res-gain .exp { color: #2f6a5a; }
.res-gain small { flex-basis: 100%; color: var(--ink-2); }
.res-extra { grid-column: 1 / -1; display: grid; gap: 8px; }
.res-level, .res-ach { margin: 0; padding: 8px 12px; background: #fffbe8; border-radius: 10px; display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.res-unit { padding: 12px; background: #fffbe8; border-radius: 12px; display: grid; gap: 8px; }
.res-items { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.res-items figure { margin: 0; text-align: center; font-size: 12px; }
.res-items img { width: 72px; height: 58px; background: #fff; border-radius: 8px; }
.res-items > span { display: flex; align-items: center; gap: 3px; font-weight: 900; }

/* 聽課與測驗 */
.slide { display: grid; grid-template-columns: 260px 1fr; gap: 24px; background: #fff; border-radius: 16px; padding: 24px; box-shadow: 0 2px 0 var(--grid-line); }
.slide-pic { display: grid; place-items: center; background-color: #eef2ee; background-image: linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px); background-size: 16px 16px; border-radius: 12px; min-height: 200px; }
.slide-pic img { width: 220px; height: 170px; }
.slide-count { margin: 0; font-size: 12px; color: var(--ink-2); }
.slide h3 { margin: 4px 0 10px; font-size: 24px; font-weight: 900; }
.slide-text { margin: 0 0 12px; font-size: 16px; line-height: 1.75; }
.slide-points { margin: 0; padding-left: 20px; display: grid; gap: 6px; font-size: 15px; }
.qbox { background: #fff; border-radius: 16px; padding: 24px; box-shadow: 0 2px 0 var(--grid-line); }
.q-progress { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 12px; font-size: 13px; color: var(--ink-2); }
.q-progress .bar > span { background: var(--board-2); }
.q-text { font-size: 20px; margin: 18px 0; line-height: 1.5; }
.q-options { display: grid; gap: 10px; }
.q-opt { display: flex; align-items: center; gap: 12px; text-align: left; padding: 12px 14px; border-radius: 12px; border: 2px solid var(--grid-line); background: #fff; cursor: pointer; font-size: 16px; }
.q-opt:hover { border-color: #b9c6bd; }
.q-opt.on { border-color: var(--board); background: #eef6f2; }
.q-key { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; background: var(--paper-2); font-weight: 900; flex: none; }
.q-opt.on .q-key { background: var(--board); color: #fff; }
.review { margin: 0; padding-left: 22px; display: grid; gap: 12px; }
.review li { padding: 10px 12px; border-radius: 10px; }
.review li.ok { background: #f2faf5; }
.review li.bad { background: #fdf1f1; }
.review p { margin: 4px 0 0; }
.review .explain { color: var(--ink-2); font-size: 14px; }

/* 配對 */
.prompt { margin: 0 0 14px; color: var(--ink-2); }
.m-pool { display: flex; flex-wrap: wrap; gap: 8px; min-height: 52px; padding: 12px; border-radius: 14px; background: #fff; border: 2px dashed #c9d5cc; margin-bottom: 14px; }
.m-empty { color: #1d6b45; font-weight: 700; }
.m-chip { padding: 8px 14px; border-radius: 999px; border: 2px solid var(--grid-line); background: #fff; cursor: pointer; font-weight: 500; touch-action: manipulation; }
.m-chip.on { border-color: var(--hl); background: #fffbe8; box-shadow: 0 0 0 3px rgba(255,210,63,.35); }
.m-chip.ok { border-color: #2e9b5f; background: #f2faf5; }
.m-chip.bad { border-color: #e5484d; background: #fdf1f1; }
.m-cats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
.m-cat { background: #fff; border-radius: 14px; padding: 10px; min-height: 140px; border: 2px solid var(--grid-line); cursor: pointer; }
.m-cat.ready { border-color: var(--hl); }
.m-cat h4 { margin: 0 0 8px; font-size: 15px; }
.m-in { display: flex; flex-wrap: wrap; gap: 6px; }
.m-explain { margin: 14px 0 0; padding-left: 20px; display: grid; gap: 4px; font-size: 14px; color: var(--ink-2); }

/* 機器人 */
.r-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.r-tab { border: 1px solid var(--grid-line); background: #fff; padding: 6px 14px; border-radius: 999px; cursor: pointer; }
.r-tab.on { background: var(--board); border-color: var(--board); color: #fff; }
.r-tab.done:not(.on) { border-color: #2e9b5f; color: #1d6b45; font-weight: 700; }
.r-area { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 18px; }
.r-left, .r-right { background: #fff; border-radius: 16px; padding: 16px; box-shadow: 0 2px 0 var(--grid-line); }
.r-left h3 { margin: 0 0 10px; font-size: 16px; }
.r-stage { display: grid; place-items: center; }
.r-stage canvas { border-radius: 8px; box-shadow: 0 0 0 1px var(--grid-line); }
.r-msg { margin: 10px 0 0; font-size: 14px; color: var(--ink-2); }
.r-msg.ok { color: #1d6b45; font-weight: 700; }
.r-msg.bad { color: #b3261e; }
.r-head { display: flex; justify-content: space-between; margin-bottom: 8px; }
.r-count { font-size: 13px; color: var(--ink-2); }
.r-prog { display: flex; flex-wrap: wrap; gap: 6px; min-height: 92px; align-content: flex-start; padding: 8px; border-radius: 10px; background: var(--paper); margin-bottom: 12px; }
.r-empty { color: var(--ink-2); font-size: 13px; padding: 6px; }
.r-step { position: relative; width: 38px; height: 38px; border-radius: 8px; border: 0; color: #fff; font-size: 18px; font-weight: 900; cursor: pointer; }
.r-step i { position: absolute; top: 1px; left: 3px; font-size: 9px; font-style: normal; opacity: .8; }
.cF { background: #3a7bd5; } .cL { background: #9b5de5; } .cR { background: #e07a20; }
.r-palette { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.r-cmd { display: grid; justify-items: center; gap: 2px; padding: 10px 4px; border: 0; border-radius: 12px; color: #fff; font-weight: 700; cursor: pointer; box-shadow: 0 3px 0 rgba(0,0,0,.2); }
.r-cmd b { font-size: 22px; line-height: 1; }
.r-cmd:active { transform: translateY(2px); box-shadow: 0 1px 0 rgba(0,0,0,.2); }
.r-tools { display: flex; gap: 8px; margin-top: 10px; }
.r-tools button { flex: 1; padding: 7px; border-radius: 8px; border: 1px solid var(--grid-line); background: #fff; cursor: pointer; font-size: 13px; }
.r-review { grid-column: 1 / -1; list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.r-review li { padding: 10px 14px; border-radius: 10px; background: #fff; }
.r-review li.ok { background: #f2faf5; } .r-review li.bad { background: #fdf1f1; }

/* 打字 */
.t-pick { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.t-chip { border: 1px solid var(--grid-line); background: #fff; padding: 6px 12px; border-radius: 999px; cursor: pointer; font-size: 14px; }
.t-chip.on { background: var(--board); border-color: var(--board); color: #fff; }
.t-area { background: #fff; border-radius: 16px; padding: 20px; box-shadow: 0 2px 0 var(--grid-line); position: relative; }
.t-area h3 { margin: 0 0 12px; font-size: 16px; }
.t-target { font: 500 22px/1.9 ui-monospace, "SF Mono", Menlo, Consolas, "Noto Sans TC", monospace; padding: 14px 16px; border-radius: 12px; background: var(--paper); white-space: pre-wrap; word-break: break-all; cursor: text; letter-spacing: .02em; }
.t-target.code { font-size: 19px; }
.t-target span.g { color: #1d6b45; }
.t-target span.r { color: #fff; background: #e5484d; border-radius: 3px; }
.t-target span.c { box-shadow: inset 0 -3px 0 var(--hl); background: #fffbe8; }
.t-hidden { position: absolute; left: 20px; top: 60px; width: 1px; height: 1px; opacity: 0; resize: none; }
.t-ime { width: 100%; margin-top: 12px; font: 500 20px/1.6 var(--font); padding: 10px 14px; border-radius: 12px; border: 2px solid var(--grid-line); }
.t-ime:focus { outline: none; border-color: var(--hl); }
.t-live { margin-top: 12px; font-size: 14px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.t-units { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.t-unit { display: grid; justify-items: center; padding: 8px 12px; border-radius: 10px; background: var(--paper); min-width: 52px; }
.t-unit b { font-size: 24px; line-height: 1.2; }
.t-unit small { font-size: 13px; color: var(--ink-2); letter-spacing: .05em; }
.t-unit.now { background: #fffbe8; box-shadow: 0 0 0 2px var(--hl); }
.t-unit.done { background: #f2faf5; color: #1d6b45; }
.t-warn { margin: 0 0 10px; padding: 8px 12px; border-radius: 10px; background: #fdf1f1; color: #b3261e; font-size: 14px; }
.t-kb { display: grid; gap: 5px; justify-content: center; }
.t-row { display: flex; gap: 5px; justify-content: center; }
.t-row:nth-child(2) { margin-left: 22px; } .t-row:nth-child(3) { margin-left: 34px; } .t-row:nth-child(4) { margin-left: 56px; }
.t-key { width: 46px; height: 50px; border-radius: 8px; border: 1px solid #c9d5cc; background: #fff; display: grid; place-items: center; align-content: center; gap: 0; cursor: pointer; box-shadow: 0 2px 0 #c9d5cc; padding: 0; }
.t-key small { font-size: 10px; color: var(--ink-2); line-height: 1; }
.t-key b { font-size: 17px; line-height: 1.2; min-height: 20px; }
.t-key.home { box-shadow: 0 2px 0 #c9d5cc, inset 0 -4px 0 -2px #b9c6bd; }
.t-key.space { width: 300px; height: 40px; font-size: 13px; color: var(--ink-2); }
.t-key.next { background: var(--hl); border-color: #d9a900; box-shadow: 0 2px 0 #b8930b; }
.t-key.hit { background: #6fe39a; }
.t-key.miss { background: #ff9a9a; }
.t-result { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; text-align: center; }
.t-result div { background: var(--paper); border-radius: 12px; padding: 16px; display: grid; }
.t-result b { font-size: 30px; font-weight: 900; }
.t-result span { font-size: 13px; color: var(--ink-2); }
.newbest { margin: 12px 0 0; text-align: center; font-weight: 700; color: #1d6b45; }
.t-modes { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.t-mode { text-align: left; background: #fff; border-radius: 14px; padding: 16px; border: 2px solid transparent; cursor: pointer; box-shadow: 0 2px 0 var(--grid-line); display: grid; gap: 6px; }
.t-mode:hover { border-color: var(--hl); }
.t-mode h4 { margin: 0; font-size: 17px; }
.t-mode p { margin: 0; font-size: 13px; color: var(--ink-2); }
.t-best { display: flex; align-items: baseline; gap: 6px; }
.t-best b { font-size: 26px; font-weight: 900; }
.t-best span, .t-mode small { font-size: 12px; color: var(--ink-2); }

/* 成就 */
.ach-badges { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.badge { display: grid; gap: 4px; padding: 12px; border-radius: 14px; background: #fff; text-align: center; opacity: .5; box-shadow: 0 2px 0 var(--grid-line); }
.badge.on { opacity: 1; background: #fffbe8; box-shadow: 0 2px 0 #f2dc8a; }
.b-grade { font-size: 12px; color: var(--ink-2); }
.ach-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.ach { padding: 12px 14px; border-radius: 14px; background: #fff; box-shadow: 0 2px 0 var(--grid-line); opacity: .6; }
.ach.on { opacity: 1; background: #f2faf5; box-shadow: 0 2px 0 #bfe5cf; }
.ach p { margin: 4px 0; font-size: 13px; color: var(--ink-2); }
.ach small { display: flex; align-items: center; gap: 3px; font-size: 12px; }

body.learning .toast { bottom: 90px; }

@media (max-width: 1100px) {
  .top-btn span { display: none; }
  .top-btn { padding: 0 10px; }
  .save-state { display: none; }
}
@media (max-width: 760px) {
  .topbar { gap: 6px; }
  .hud { gap: 8px; padding: 0 8px; height: 36px; }
  .hud-lv { min-width: 40px; }
  .hud-cur:last-child { display: none; }
  .room-name input { width: 30vw; }
  .learn { top: var(--top-h); }
  .l-head { padding: 8px 12px; }
  .l-body { padding: 14px; }
  .l-daily { grid-template-columns: auto 1fr; }
  .l-daily > .l-btn { grid-column: 1 / -1; justify-content: center; }
  .slide { grid-template-columns: 1fr; padding: 16px; }
  .slide-pic { min-height: 150px; }
  .r-area { grid-template-columns: 1fr; }
  .u-act { grid-template-columns: 32px 1fr; }
  .a-side { grid-column: 1 / -1; grid-template-columns: 1fr auto; align-items: center; }
  .t-key { width: 28px; height: 42px; }
  .t-key b { font-size: 14px; }
  .t-row:nth-child(n) { margin-left: 0; }
  .t-key.space { width: 200px; }
  .buy[open] { grid-template-columns: 1fr; }
  .b-pic { width: 100%; height: 150px; }
}

@media (max-width: 520px) {
  .room-name { display: none; }
  .top-btn { width: 38px; padding: 0; justify-content: center; }
  .topbar { padding: 0 8px; gap: 5px; }
  .brand { flex: 0 0 auto; }
  .top-actions { margin-left: auto; }
  .hud-lv { min-width: 34px; }
  .account { min-width: 0; }
  .g-top { max-width: 110px; overflow: hidden; }
}

/* =========================================================
   v0.4：積木編輯器
   ========================================================= */
.bk-area { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 16px; align-items: start; }
.bk-main-col { background: #fff; border-radius: 16px; padding: 12px; box-shadow: 0 2px 0 var(--grid-line); min-width: 0; }
.bk-edhead { display: flex; align-items: center; gap: 10px; padding: 0 4px 8px; }
.bk-edhead .bk-count { font-size: 13px; color: var(--ink-2); flex: 1; }
.bk-clear { border: 1px solid var(--grid-line); background: #fff; border-radius: 8px; padding: 4px 10px; font-size: 13px; cursor: pointer; }
.bk-editor { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 10px; min-height: 420px; user-select: none; -webkit-user-select: none; }
.bk-editor.ro { grid-template-columns: 1fr; min-height: 0; }
.bk-pal { background: var(--paper); border-radius: 12px; padding: 8px; display: grid; gap: 6px; align-content: start; overflow-y: auto; max-height: 560px; touch-action: none; }
.bk-cat { margin: 6px 2px 0; font-size: 12px; font-weight: 700; color: var(--c); }
.bk-ws {
  position: relative; border-radius: 12px; padding: 14px; overflow: auto; max-height: 560px; touch-action: none;
  background-color: #f7f9f7;
  background-image: radial-gradient(#d5ddd6 1px, transparent 1px); background-size: 16px 16px;
}
.bk-editor.ro .bk-ws { max-height: 360px; }
.bk-tip { color: var(--ink-2); font-size: 13px; margin: 8px 0 0; }
.bk-script { display: inline-grid; min-width: 200px; }
.bk {
  --c: #4c8ff7;
  display: grid; width: max-content; min-width: 120px;
  background: var(--c); color: #fff; border-radius: 6px;
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.18);
  font-size: 14px; font-weight: 700; cursor: grab; touch-action: none;
}
.bk-row { display: flex; align-items: center; gap: 6px; padding: 7px 10px; white-space: nowrap; }
.bk-hat { --c: #e8a90c; border-radius: 14px 14px 6px 6px; cursor: default; }
.bk-hat .flag { color: #2e9b5f; background: #fff; border-radius: 4px; padding: 0 4px; font-size: 12px; }
.bk-stack { display: grid; gap: 2px; min-height: 8px; }
.bk-main { padding-bottom: 30px; }
.bk-c { padding-bottom: 0; }
.bk-c > .bk-stack { margin-left: 14px; background: #f7f9f7; border-radius: 0 6px 6px 0; padding: 3px 0 3px 3px; min-height: 30px; min-width: 120px; }
.bk-c > .bk-stack.bk-ph { min-height: 14px; background: rgba(255,255,255,.6); }
.bk-mid { padding-top: 5px; padding-bottom: 5px; }
.bk-foot { height: 12px; }
.bk-in, .bk-sel { font: 700 13px/1.2 var(--font); color: var(--ink); background: #fff; border: 0; border-radius: 999px; padding: 3px 8px; min-width: 26px; text-align: center; }
.bk-in.txt { border-radius: 6px; }
.bk-sel { border-radius: 6px; padding: 3px 4px; cursor: pointer; }
.bk-val { display: inline-flex; align-items: center; gap: 2px; }
.bk-varpick { width: 18px; padding: 2px 0; border: 0; border-radius: 4px; background: rgba(255,255,255,.25); color: #fff; font: 700 11px var(--font); cursor: pointer; appearance: none; text-align: center; }
.bk-pill { font: 700 13px var(--font); color: #fff; background: #f07f1b; border: 2px solid #fff; border-radius: 999px; padding: 1px 9px; cursor: pointer; }
.bk-ins { height: 6px; border-radius: 3px; background: var(--hl); box-shadow: 0 0 0 2px rgba(255,210,63,.4); margin: 2px 0; }
.bk.run { outline: 3px solid var(--hl); outline-offset: 1px; filter: brightness(1.12); }
.bk-drag { position: fixed; left: 0; top: 0; z-index: 50; pointer-events: none; opacity: .92; filter: drop-shadow(0 8px 14px rgba(0,0,0,.25)); }
.bk-editor.dragging, .bk-editor.dragging * { cursor: grabbing !important; }
.bk-editor.ro .bk { cursor: default; }
.bk-side { display: grid; gap: 12px; background: #fff; border-radius: 16px; padding: 14px; box-shadow: 0 2px 0 var(--grid-line); }
.bk-task h3 { margin: 0 0 6px; font-size: 16px; }
.bk-task p { margin: 0 0 8px; font-size: 14px; color: var(--ink-2); }
.bk-goals { margin: 0; padding: 0; list-style: none; display: grid; gap: 4px; font-size: 13px; }
.bk-goals li::before { content: "◎ "; color: #2e9b5f; font-weight: 900; }
.bk-mon { display: flex; flex-wrap: wrap; gap: 6px; }
.bk-mon[hidden] { display: none; }
.mon { font-size: 13px; background: #f07f1b; color: #fff; border-radius: 6px; padding: 3px 8px; }
.mon.list { background: #e5602a; }
.mon b { background: #fff; color: var(--ink); border-radius: 4px; padding: 0 6px; margin-left: 2px; }
.bk-runbar { display: flex; justify-content: flex-end; }
.bk-speed { display: inline-flex; border: 1px solid var(--grid-line); border-radius: 999px; overflow: hidden; }
.bk-speed button { border: 0; background: #fff; padding: 4px 12px; font-size: 13px; cursor: pointer; }
.bk-speed button.on { background: var(--board); color: #fff; }
.pj-label { display: grid; gap: 4px; margin-bottom: 12px; font-weight: 700; }
.pj-title { font: 500 16px var(--font); padding: 10px 12px; border-radius: 10px; border: 2px solid var(--grid-line); }
.pj-title:focus { outline: none; border-color: var(--hl); }
.pj-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.pj-card { background: #fff; border-radius: 14px; padding: 14px; display: grid; gap: 6px; box-shadow: 0 2px 0 var(--grid-line); }
.pj-card.mine { box-shadow: 0 2px 0 #f2dc8a; }
.pj-card h4 { margin: 0; font-size: 16px; }
.pj-by, .pj-note { margin: 0; font-size: 13px; color: var(--ink-2); }
.pj-note { color: #b3261e; }
.pj-top { display: flex; justify-content: space-between; align-items: center; min-height: 28px; }
.pj-status { font-size: 12px; font-weight: 700; padding: 1px 8px; border-radius: 999px; }
.pj-status:empty { display: none; }
.pj-status.pending { background: #fffbe8; color: var(--hl-ink); }
.pj-status.approved { background: #e9f7ef; color: #1d6b45; }
.pj-status.rejected { background: #fdf1f1; color: #b3261e; }
.pj-like { border: 1px solid var(--grid-line); background: #fff; border-radius: 999px; padding: 3px 10px; cursor: pointer; color: #c4cec7; font-size: 14px; }
.pj-like.on { color: #e5484d; border-color: #f3c9c9; background: #fdf1f1; }
.pj-like b { color: var(--ink); }
.pj-like:disabled { cursor: default; }

/* =========================================================
   v0.4：排序、搜尋、二進位、像素、路由、圖表
   ========================================================= */
.rd-area { background: #fff; border-radius: 16px; padding: 20px; box-shadow: 0 2px 0 var(--grid-line); }
.rd-area .r-review { margin: 0; }
.tgt { margin: 0 0 14px; font-size: 16px; }
.tgt b { font-size: 22px; background: var(--hl); padding: 0 10px; border-radius: 8px; }
.cards { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; justify-content: center; padding: 10px 0; }
.card-n {
  display: grid; place-items: center; align-content: center; gap: 2px;
  width: 64px; height: 88px; border-radius: 10px; border: 2px solid #c9d5cc; background: #fff;
  box-shadow: 0 3px 0 #c9d5cc; font: inherit;
}
.card-n b { font-size: 26px; font-weight: 900; }
.card-n small { font-size: 11px; color: var(--ink-2); }
.cards.small .card-n { width: 52px; height: 72px; cursor: pointer; background: var(--board); border-color: var(--board); color: #fff; box-shadow: 0 3px 0 #0f2620; }
.cards.small .card-n small { color: #b9cdc5; }
.cards.small .card-n.open { background: #fff; color: var(--ink); border-color: #c9d5cc; box-shadow: 0 3px 0 #c9d5cc; cursor: default; }
.cards.small .card-n.hit { background: var(--hl); border-color: #d9a900; }
.cards.small .card-n:disabled:not(.open) { opacity: .6; cursor: default; }
.swap { width: 34px; height: 34px; border-radius: 50%; border: 0; background: var(--paper-2); cursor: pointer; font-size: 16px; font-weight: 900; }
.swap:hover { background: var(--hl); }
.r-tools .primary { background: var(--board); color: #fff; border-color: var(--board); }
.bulbs { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin: 6px 0 12px; }
.bulb { display: grid; justify-items: center; gap: 4px; padding: 8px 6px; width: 60px; border: 0; border-radius: 12px; background: var(--paper); cursor: pointer; font: inherit; }
.bulb i { width: 34px; height: 34px; border-radius: 50%; background: #d5ddd6; box-shadow: inset 0 -4px 0 rgba(0,0,0,.08); }
.bulb.on i { background: var(--hl); box-shadow: 0 0 18px 4px rgba(255,210,63,.75), inset 0 -4px 0 rgba(0,0,0,.08); }
.bulb b { font-size: 18px; }
.bulb small { font-size: 12px; color: var(--ink-2); }
.bulb:disabled { cursor: default; }
.b-sum { text-align: center; font-size: 16px; font-weight: 700; margin: 0; }
.b-sum.ok { color: #1d6b45; }
.b-answer { display: flex; gap: 8px; justify-content: center; margin-top: 12px; }
.b-in { font: 700 20px var(--font); width: 140px; text-align: center; padding: 8px; border-radius: 10px; border: 2px solid var(--grid-line); }
.px-wrap { display: grid; grid-template-columns: auto minmax(0, 340px); gap: 24px; justify-content: center; align-items: stretch; }
.px-code { display: grid; padding: 2px 0; font: 600 18px/1 ui-monospace, Menlo, Consolas, monospace; letter-spacing: .18em; }
.px-code > div { display: flex; align-items: center; }
.px-code small { display: inline-block; width: 22px; font-size: 11px; color: var(--ink-2); letter-spacing: 0; }
.px-grid { display: grid; gap: 2px; background: #c9d5cc; padding: 2px; border-radius: 8px; touch-action: none; }
.px { aspect-ratio: 1; border: 0; background: #fff; cursor: pointer; padding: 0; }
.px.on { background: var(--ink); }
.rt-map { width: 100%; max-width: 640px; display: block; margin: 0 auto; }
.rt-edge { stroke: #c9d5cc; stroke-width: 4; }
.rt-edge.used { stroke: #3a7bd5; stroke-width: 6; }
.rt-cost-bg { fill: #fff; stroke: #c9d5cc; }
.rt-cost-bg.used { stroke: #3a7bd5; }
.rt-cost { font: 700 13px var(--font); fill: var(--ink); }
.rt-node rect, .rt-node circle { fill: #fff; stroke: #8a9690; stroke-width: 2; }
.rt-node text { font: 700 13px var(--font); fill: var(--ink); }
.rt-node .rt-label { font-size: 12px; font-weight: 500; fill: var(--ink-2); }
.rt-node.on rect, .rt-node.on circle { fill: #dbe9ff; stroke: #3a7bd5; }
.rt-node.can { cursor: pointer; }
.rt-node.can rect, .rt-node.can circle { stroke: #d9a900; stroke-width: 3; fill: #fffbe8; }
.rt-node.dest rect { stroke: #2e9b5f; }
.q-chart { width: 100%; max-width: 520px; display: block; margin: -6px 0 16px; }
.qc-axis { stroke: #8a9690; stroke-width: 1.5; }
.qc-bar { fill: #3a7bd5; }
.qc-line { fill: none; stroke: #3a7bd5; stroke-width: 3; }
.qc-dot { fill: #fff; stroke: #3a7bd5; stroke-width: 2; }
.qc-val { font: 700 12px var(--font); fill: var(--ink); }
.qc-lab { font: 500 12px var(--font); fill: var(--ink-2); }

@media (max-width: 1000px) {
  .bk-area { grid-template-columns: 1fr; }
  .bk-side { order: -1; }
}
@media (max-width: 760px) {
  .bk-editor { grid-template-columns: 1fr; }
  .bk-pal { max-height: 180px; grid-auto-flow: row; }
  .bk-ws { max-height: 380px; min-height: 260px; }
  .px-wrap { grid-template-columns: 1fr; }
  .card-n { width: 52px; height: 72px; }
  .bulb { width: 40px; }
  .bulb i { width: 26px; height: 26px; }
}