/* 黑板形态 · 主题化（CSS 变量）
 * 两套主题：black（默认）/ green，均由 html[data-theme] 切换
 */
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; overflow: hidden; }

/* ---------- 主题变量：绿色黑板 ---------- */
:root,
html[data-theme="green"] {
  --board-a: #1b3d31;
  --board-b: #14312a;
  --board-c: #0f2620;
  --noise-opacity: .075;
  --chalk: #ffffff;

  --app-bg: #0d1f19;
  --chrome: #14231d;
  --chrome-2: #17281f;
  --chrome-3: #101b17;
  --chrome-deep: #0b1512;
  --border: #22392f;
  --border-2: #2b453a;

  --text: #e8ecea;
  --text-dim: #a9c2b6;
  --text-mute: #7f9a8d;
  --text-faint: #6e887c;

  --accent: #2fbf71;
  --accent-ink: #06231a;
  --accent-soft: #1e3529;
  --danger: #e5484d;

  --tk-kw: #ff9d7a;
  --tk-str: #b6e58d;
  --tk-num: #e6c07b;
  --tk-com: #5f7d6f;
  --tk-pp: #c79bff;
}

/* ---------- 主题变量：黑色黑板（默认） ---------- */
html[data-theme="black"] {
  --board-a: #17171b;
  --board-b: #0f0f12;
  --board-c: #070708;
  --noise-opacity: .05;
  --chalk: #f4f4f2;

  --app-bg: #0a0a0c;
  --chrome: #141418;
  --chrome-2: #191920;
  --chrome-3: #0f0f13;
  --chrome-deep: #0a0a0d;
  --border: #26262d;
  --border-2: #32323b;

  --text: #ececf1;
  --text-dim: #a8a8b6;
  --text-mute: #7d7d8b;
  --text-faint: #6a6a78;

  --accent: #2fbf71;
  --accent-ink: #06231a;
  --accent-soft: #1d2b25;
  --danger: #e5484d;

  --tk-kw: #ff9d7a;
  --tk-str: #b6e58d;
  --tk-num: #e6c07b;
  --tk-com: #6b7280;
  --tk-pp: #c79bff;
}

body {
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--app-bg); color: var(--text);
  display: flex; flex-direction: column;
  transition: background .25s ease;
}

/* ---------- 顶栏 ---------- */
#topbar {
  flex: 0 0 auto; height: 34px; display: flex; align-items: center; gap: 10px;
  padding: 0 10px; background: var(--chrome); border-bottom: 1px solid var(--border);
  font-size: 12px; user-select: none;
}
.dot-logo { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.app-name { font-weight: 700; letter-spacing: 1px; color: var(--text); }
.tag { padding: 1px 8px; border-radius: 9px; background: var(--chrome-2); color: var(--text-dim); }
.tag.ghost { background: transparent; border: 1px solid var(--border-2); }
.spacer { flex: 1; }
.ico {
  background: transparent; border: 1px solid transparent; color: var(--text-dim);
  border-radius: 4px; padding: 1px 7px; cursor: pointer; font-size: 13px; line-height: 18px;
}
.ico:hover { background: var(--accent-soft); color: var(--text); }

/* 主题切换 */
.theme-switch { display: flex; align-items: center; gap: 5px; margin-right: 4px; }
.theme-switch .sw {
  width: 18px; height: 18px; border-radius: 50%; padding: 0; cursor: pointer;
  border: 2px solid transparent; box-shadow: 0 0 0 1px var(--border-2);
}
.theme-switch .sw[data-theme-set="black"] { background: linear-gradient(145deg, #1b1b20, #050506); }
.theme-switch .sw[data-theme-set="green"] { background: linear-gradient(145deg, #235040, #0d241d); }
.theme-switch .sw.on { border-color: var(--accent); }
.theme-switch[hidden] { display: none; }

/* ---------- 黑板 ---------- */
#board {
  position: relative; flex: 1 1 auto; min-height: 0;
  background: radial-gradient(1200px 700px at 30% 20%, var(--board-a) 0%, var(--board-b) 45%, var(--board-c) 100%);
  overflow: hidden; transition: background .25s ease;
}
#board::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: var(--noise-opacity);
  background-image: radial-gradient(#ffffff 0.5px, transparent 0.5px);
  background-size: 3px 3px;
}
#ink { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: none; }
#layer { position: absolute; inset: 0; pointer-events: none; }

/* ---------- 浮动窗口 ---------- */
.win, .card {
  position: absolute; display: flex; flex-direction: column;
  background: var(--chrome-3); border: 1px solid var(--border-2); border-radius: 7px;
  box-shadow: 0 12px 32px rgba(0,0,0,.5), 0 1px 0 rgba(255,255,255,.04) inset;
  pointer-events: auto; overflow: hidden;
}
.win-head, .card-head {
  flex: 0 0 auto; height: 30px; display: flex; align-items: center; gap: 6px;
  padding: 0 6px 0 9px; background: var(--chrome-2); border-bottom: 1px solid var(--border-2);
  cursor: move; user-select: none; font-size: 12px;
}
.win-ico { color: var(--accent); opacity: .8; }
.win-title, .card-title { color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

#cwWin { min-width: 240px; min-height: 160px; z-index: 45; }
#cwWin.min { min-height: 0; min-width: 160px; }
.win-body { flex: 1 1 auto; min-height: 0; background: var(--chrome-deep); display: flex; align-items: center; justify-content: center; overflow: hidden; }
#pdfCanvas { display: block; max-width: 100%; max-height: 100%; }
.win-foot {
  flex: 0 0 auto; height: 30px; display: flex; align-items: center; gap: 6px;
  padding: 0 6px; background: var(--chrome-2); border-top: 1px solid var(--border-2); font-size: 12px;
}
.win-foot .chk { display: flex; align-items: center; gap: 4px; color: var(--text-mute); font-size: 11px; }
.pager { font-variant-numeric: tabular-nums; min-width: 52px; text-align: center; color: var(--text-dim); }

/* ---------- 代码小黑板 ---------- */
.card { min-width: 260px; min-height: 130px; }
.card-head .card-sub { font-size: 11px; color: var(--text-mute); }
.card-body { flex: 1 1 auto; min-height: 0; overflow: auto; background: var(--chrome-deep); }
.card-body pre { margin: 0; padding: 8px 10px; font: 12.5px/1.6 ui-monospace, Consolas, "Cascadia Mono", monospace; color: var(--text); }
.card-body .ln { display: inline-block; width: 2.2em; text-align: right; margin-right: 10px; color: var(--text-faint); user-select: none; }
.card-foot {
  flex: 0 0 auto; height: 28px; display: flex; align-items: center; gap: 8px;
  padding: 0 8px; background: var(--chrome-2); border-top: 1px solid var(--border-2);
}
.card-foot select {
  background: var(--chrome-3); color: var(--text-dim); border: 1px solid var(--border-2);
  border-radius: 4px; font-size: 11px; padding: 1px 4px;
}
/* 语法高亮 */
.tk-kw { color: var(--tk-kw); } .tk-str { color: var(--tk-str); }
.tk-num { color: var(--tk-num); } .tk-com { color: var(--tk-com); font-style: italic; }
.tk-pp { color: var(--tk-pp); }

/* ---------- 右侧工具条 ---------- */
#tools {
  position: fixed; right: 12px; top: 50%; transform: translateY(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 8px 6px;
  background: color-mix(in srgb, var(--chrome) 86%, transparent);
  border: 1px solid var(--border-2); border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,.45), 0 1px 0 rgba(255,255,255,.05) inset;
  backdrop-filter: blur(10px); z-index: 510;
}
#tools[hidden] { display: none; }

.tgroup { display: flex; flex-direction: column; gap: 2px; }

.tbtn {
  width: 34px; height: 34px; border-radius: 10px; border: 1px solid transparent;
  background: transparent; color: var(--text-dim); cursor: pointer;
  display: flex; align-items: center; justify-content: center; padding: 0;
  transition: background .12s ease, color .12s ease, border-color .12s ease;
}
.tbtn svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.tbtn:hover { background: var(--accent-soft); color: var(--text); }
.tbtn.on {
  background: color-mix(in srgb, var(--accent) 22%, transparent);
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  color: var(--accent);
}
.tbtn:active { transform: scale(.94); }
.tbtn.disabled { opacity: .3; cursor: default; }
.tbtn.disabled:hover { background: transparent; color: var(--text-dim); }
body.laser-mode, body.laser-mode #ink, body.laser-mode #pageInk { cursor: none; }

/* 颜色 */
.tswatches { display: grid; grid-template-columns: repeat(2, 1fr); gap: 5px; padding: 4px 0 2px; }
.swatch {
  width: 14px; height: 14px; border-radius: 50%; padding: 0; cursor: pointer;
  background: var(--c); border: 1.5px solid transparent;
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--border-2) 90%, transparent);
}
.swatch.on { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 35%, transparent); }

/* 粗细 */
.twidths { display: flex; gap: 3px; padding: 2px 0 4px; }
.wd {
  width: 9px; height: 22px; padding: 0; border-radius: 4px; cursor: pointer;
  background: transparent; border: 1px solid transparent;
  display: flex; align-items: center; justify-content: center;
}
.wd::after { content: ""; display: block; width: var(--w); height: var(--w); border-radius: 50%; background: var(--text-mute); }
.wd.on { background: var(--accent-soft); }
.wd.on::after { background: var(--accent); }

.tsep { width: 22px; height: 1px; background: var(--border-2); margin: 3px 0; }

/* ---------- 激光笔层 ---------- */
#laser {
  position: fixed; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 620;
}

/* ---------- 底部状态栏 ---------- */
#statusbar {
  flex: 0 0 auto; height: 24px;
  display: flex; align-items: center; gap: 6px; padding: 0 12px;
  font-size: 11px; color: var(--text-faint);
  background: color-mix(in srgb, var(--chrome) 92%, transparent);
  border-top: 1px solid var(--border); z-index: 515;
}
#statusbar .sb-item { color: var(--text-mute); }
#statusbar .sb-dot { opacity: .5; }
#statusbar .sb-hint { opacity: .75; }

/* ---------- 浏览器拦截页 ---------- */
#browserGate {
  position: fixed; inset: 0; z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  background: #0a0c10;
}
#browserGate[hidden] { display: none; }
.gate-card { max-width: 460px; padding: 28px; text-align: center; }
.gate-card h1 { font-size: 22px; margin: 0 0 12px; color: var(--text); }
.gate-card .muted { font-size: 13px; line-height: 1.7; }

/* ---------- 浮动面板 ---------- */
#panel {
  position: fixed; right: 56px; top: 44px; width: 322px; max-height: calc(100vh - 90px);
  overflow: auto; padding: 12px; z-index: 500;
  background: var(--chrome-3); opacity: .97;
  border: 1px solid var(--border-2); border-radius: 8px;
  box-shadow: 0 16px 40px rgba(0,0,0,.55); backdrop-filter: blur(8px);
}
#panel[hidden] { display: none; }
#panel h3 { font-size: 11px; letter-spacing: .8px; text-transform: uppercase; color: var(--text-mute); margin: 12px 0 7px; }
#panel h3:first-child { margin-top: 0; }
.muted { color: var(--text-faint); font-size: 12px; }
.pad { padding: 6px 0; }
.desc { color: var(--text-dim); white-space: pre-wrap; margin: 0 0 8px; }

button {
  background: var(--chrome-2); color: var(--text); border: 1px solid var(--border-2);
  border-radius: 5px; padding: 4px 10px; cursor: pointer; font-size: 12.5px;
}
button:hover { background: var(--accent-soft); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 700; }
button.primary:hover { filter: brightness(1.12); }
button.wide { width: 100%; padding: 7px; }

/* 巡看 */
.roster { display: flex; flex-direction: column; gap: 5px; }
.row-item {
  display: grid; grid-template-columns: 10px 1fr auto auto; gap: 8px; align-items: center;
  background: var(--chrome-2); border: 1px solid var(--border-2); border-radius: 5px; padding: 5px 7px;
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-faint); }
.dot.editing { background: #e0b341; } .dot.compiled { background: #4a9eff; }
.dot.compile_failed, .dot.failed, .dot.runtime_error { background: var(--danger); }
.dot.ran, .dot.passed { background: var(--accent); }
.row-name { font-weight: 600; }
.row-meta { font-size: 11px; color: var(--text-mute); }
.row-item button { padding: 1px 7px; font-size: 11px; }

.projected {
  background: var(--chrome-deep); border: 1px solid var(--border-2); border-radius: 5px; padding: 8px;
  font: 11.5px/1.55 ui-monospace, Consolas, monospace; white-space: pre-wrap;
  max-height: 260px; overflow: auto; min-height: 54px;
}

/* 学生编辑器 */
#editor {
  width: 100%; height: 240px; resize: vertical; background: var(--chrome-deep); color: var(--text);
  border: 1px solid var(--border-2); border-radius: 5px; padding: 8px;
  font: 12.5px/1.55 ui-monospace, Consolas, monospace; tab-size: 4;
}
.row { display: flex; gap: 6px; align-items: center; margin-top: 7px; }
.status { margin-left: auto; font-size: 11.5px; color: var(--text-mute); }
.out {
  background: var(--chrome-deep); border: 1px solid var(--border-2); border-radius: 5px; padding: 8px; margin: 0;
  font: 11.5px/1.55 ui-monospace, Consolas, monospace; white-space: pre-wrap;
  min-height: 56px; max-height: 200px; overflow: auto;
}
.diag { margin-top: 7px; font-size: 11.5px; }
.diag .d { padding: 3px 6px; border-left: 3px solid var(--danger); background: var(--chrome-2); margin-bottom: 3px; border-radius: 3px; }
.diag .d.warn { border-color: #e0b341; }
.diag .d.hint { border-color: #4a9eff; }



/* ---------- 课包 / 布局 / 计时 ---------- */
.tag.timer {
  background: var(--accent-soft); color: var(--accent);
  font-variant-numeric: tabular-nums; font-weight: 700; letter-spacing: .5px;
}
.tag.timer.over { background: rgba(229,72,77,.18); color: var(--danger); }
.lesson-select {
  width: 100%; margin-bottom: 6px; padding: 4px 6px; font-size: 12.5px;
  background: var(--chrome-deep); color: var(--text); border: 1px solid var(--border-2); border-radius: 5px;
}
.layouts { display: grid; grid-template-columns: 1fr 1fr; gap: 5px; }
.layouts button { padding: 5px 4px; font-size: 12px; }
.layouts button.on { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* ---------- 课件页叠加批注层 ---------- */
.page-wrap { position: relative; display: flex; align-items: center; justify-content: center; max-width: 100%; max-height: 100%; }
#pageInk { position: absolute; left: 0; top: 0; pointer-events: none; }
#pageInk.active { pointer-events: auto; cursor: crosshair; touch-action: none; }

/* ---------- 多页白板：翻页条 ---------- */
#boardTabs {
  position: absolute; left: 50%; top: 6px; transform: translateX(-50%);
  display: flex; gap: 4px; align-items: center; z-index: 520; font-size: 11.5px;
  max-width: min(70vw, 720px);
  padding: 2px 6px; border-radius: 999px;
  background: color-mix(in srgb, var(--chrome) 82%, transparent);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
}
#boardTabs .pstrip {
  display: flex; gap: 4px; align-items: center;
  overflow-x: auto; overflow-y: hidden; scrollbar-width: none;
  max-width: 46vw;
}
#boardTabs .pstrip::-webkit-scrollbar { display: none; }
#boardTabs .pnav {
  flex: 0 0 auto; width: 22px; height: 22px; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%; cursor: pointer; line-height: 1;
  background: var(--chrome-2); color: var(--text-mute); border: 1px solid var(--border-2);
}
#boardTabs .pnav:hover:not(:disabled) { color: var(--accent); border-color: var(--accent); }
#boardTabs .pnav:disabled { opacity: .35; cursor: default; }
#boardTabs .pnav.add { color: var(--accent); }
#boardTabs .pnav.del:hover:not(:disabled) { color: var(--danger); border-color: var(--danger); }
#boardTabs .pcount {
  flex: 0 0 auto; font-family: var(--font-mono); font-size: 10.5px;
  color: var(--text-faint); padding: 0 2px; white-space: nowrap;
}
#boardTabs .btab {
  flex: 0 0 auto;
  padding: 2px 10px; border-radius: 11px; cursor: pointer; line-height: 18px;
  background: var(--chrome-2); color: var(--text-mute); border: 1px solid var(--border-2);
  white-space: nowrap;
}
#boardTabs .btab.on { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
#boardTabs .btab.add { padding: 4px 9px; }

/* ---------- 黑板文字 ---------- */
#layer .board-text {
  position: absolute; max-width: 70%; min-width: 2ch;
  padding: 2px 4px; margin: -4px 0 0 -4px;
  line-height: 1.35; white-space: pre-wrap; word-break: break-word;
  font-family: var(--font-ui); font-weight: 500;
  color: var(--chalk);
  outline: none; pointer-events: none;
  border-radius: 4px;
}
body.tool-text #layer .board-text { pointer-events: auto; cursor: text; }
body.tool-text #layer .board-text:focus {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 55%, transparent);
}
body.tool-text #layer .board-text:empty::before {
  content: "输入文字…"; color: var(--text-faint); font-weight: 400;
}

/* ---------- 课包编辑 / 上传 / 课堂控制 ---------- */
.ipt {
  width: 100%; margin-bottom: 6px; padding: 4px 6px; font-size: 12.5px;
  background: var(--chrome-deep); color: var(--text);
  border: 1px solid var(--border-2); border-radius: 5px;
}
.row .ipt { width: 50%; margin-bottom: 0; }
.file { width: 100%; font-size: 11.5px; color: var(--text-mute); }
.row-item .badge { font-size: 11px; padding: 0 5px; border-radius: 8px; background: var(--chrome-deep); color: var(--text-mute); }
.row-item .badge.hand { background: rgba(224,179,65,.18); color: #e0b341; }
.row-item .badge.mic { background: rgba(47,191,113,.16); color: var(--accent); }
.row-item .badge.muted { background: rgba(229,72,77,.16); color: var(--danger); }
.row-item .acts { display: flex; gap: 4px; }

.me-bar {
  display: flex; align-items: center; gap: 8px; margin-bottom: 10px;
  padding-bottom: 10px; border-bottom: 1px solid var(--border-2);
}
.me-bar .mic { font-size: 12px; color: var(--text-mute); margin-left: auto; }
.me-bar .mic.granted { color: var(--accent); }
.me-bar .mic.muted { color: var(--danger); }

/* ---------- 非沙箱警示 ---------- */
#sandboxWarn {
  flex: 0 0 auto; padding: 6px 14px; font-size: 13px; font-weight: 700;
  letter-spacing: .2px;
  background: #7a1f22; color: #ffe0e1;
  border-bottom: 2px solid #ff5c60;
  display: flex; align-items: center; gap: 8px;
}
#sandboxWarn[hidden] { display: none; }

/* ---------- 入课页 ---------- */
#join {
  position: fixed; inset: 0; z-index: 900;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(900px 600px at 40% 20%, #16262b 0%, #0a1013 100%);
}
#join[hidden] { display: none; }
.join-card {
  width: 340px; padding: 26px 24px 20px;
  background: var(--chrome-3); border: 1px solid var(--border-2); border-radius: 12px;
  box-shadow: 0 24px 60px rgba(0,0,0,.6);
}
.join-card h1 { margin: 0 0 6px; font-size: 20px; letter-spacing: 1px; color: var(--text); }
.join-card .muted { margin: 0 0 16px; font-size: 12.5px; }
.join-label { display: block; font-size: 11.5px; color: var(--text-mute); margin: 10px 0 4px; }
.join-card .ipt { width: 100%; padding: 8px 10px; font-size: 14px; margin: 0 0 4px; }
.join-card .wide { margin-top: 16px; padding: 9px; font-size: 14px; }
.join-err { min-height: 18px; margin: 10px 0 0; font-size: 12px; color: var(--danger); }

/* 教师端学生入口 */
.join-info { font-size: 12.5px; }
.join-info b { color: var(--accent); font-variant-numeric: tabular-nums; }
.join-info .muted { margin: 4px 0 8px; word-break: break-all; font-size: 11px; }

/* ---------- 巡看窗口 ---------- */
#proctorWin { position: fixed; z-index: 540; left: 56px; top: 78px; width: 760px; height: 540px; }
#projWin { position: fixed; z-index: 545; left: 120px; top: 130px; width: 660px; height: 430px; }
#proctorWin[hidden], #projWin[hidden] { display: none; }

.proctor-body { display: flex; flex-direction: column; align-items: stretch; gap: 8px; padding: 10px; overflow: hidden; }

.pfilter { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.chip {
  font-size: 11.5px; padding: 3px 10px; border-radius: 999px; cursor: pointer;
  background: var(--chrome-2); color: var(--text-mute); border: 1px solid var(--border-2);
}
.chip.on { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }

.pgrid {
  flex: 1 1 auto; overflow: auto; display: grid; gap: 8px;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  align-content: start;
}
.pcard {
  text-align: left; cursor: pointer; display: flex; flex-direction: column; gap: 3px;
  padding: 8px 9px; border-radius: 9px; height: 128px; overflow: hidden;
  background: var(--chrome-2); border: 1px solid var(--border-2); color: var(--text);
}
.pcard:hover { border-color: var(--accent); background: var(--accent-soft); }
.pc-top { display: flex; align-items: center; gap: 5px; font-size: 12.5px; }
.pc-top b { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pc-meta { font-size: 11px; color: var(--text-mute); }
.pc-code {
  margin: 2px 0 0; font-size: 10px; line-height: 1.35; color: var(--text-faint);
  font-family: ui-monospace, Consolas, monospace; white-space: pre; overflow: hidden;
  flex: 1 1 auto;
}
.pempty { padding: 18px; text-align: center; font-size: 12px; }

.pdetail { flex: 1 1 auto; display: flex; flex-direction: column; gap: 6px; min-height: 0; }
.pdetail[hidden] { display: none; }
.pdetail-head { display: flex; align-items: center; gap: 8px; font-size: 12.5px; }
#reviewEditor { flex: 1 1 auto; min-height: 0; border: 1px solid var(--border-2); border-radius: 8px; overflow: hidden; }
#projEditor { flex: 1 1 auto; min-height: 0; }

/* ---------- 面板缩放把手 ---------- */
#panelResize {
  position: absolute; left: -3px; top: 0; bottom: 0; width: 6px;
  cursor: col-resize; border-radius: 3px;
}
#panelResize:hover { background: var(--accent-soft); }

/* ---------- 课包卡片 ---------- */
.lesson-cards { display: flex; flex-direction: column; gap: 5px; margin-bottom: 6px; max-height: 190px; overflow: auto; }
.lcard {
  text-align: left; cursor: pointer; display: flex; flex-direction: column; gap: 1px;
  padding: 6px 8px; border-radius: 8px; background: var(--chrome-2);
  border: 1px solid var(--border-2); color: var(--text); font-size: 12px;
}
.lcard b { font-weight: 600; }
.lcard .lmeta { font-size: 10.5px; color: var(--text-mute); }
.lcard:hover { border-color: var(--accent); }
.lcard.on { border-color: var(--accent); background: var(--accent-soft); }

/* ---------- 编辑器状态栏 ---------- */
.ed-status {
  display: flex; align-items: center; gap: 6px; padding: 3px 6px;
  font-size: 10.5px; color: var(--text-faint);
  background: var(--chrome-deep); border: 1px solid var(--border-2); border-top: none;
  border-radius: 0 0 6px 6px;
}
.ed-status .ed-sep { opacity: .5; }
.ed-zoom {
  font-size: 10.5px; padding: 1px 6px; border-radius: 4px; cursor: pointer;
  background: var(--chrome-2); color: var(--text-mute); border: 1px solid var(--border-2);
}
.ed-zoom:hover { color: var(--text); border-color: var(--accent); }

/* 投屏 / 巡看详情：编辑器必须撑满。
   .win-body 默认是「居中 + row」给 PDF 用的，会把编辑器压成 5px 宽，这里必须覆盖。 */
#projWin .win-body {
  position: relative; display: block; padding: 0; overflow: hidden;
  align-items: stretch; justify-content: flex-start;
}
#projEditor { position: absolute; inset: 0; }
#reviewEditor { flex: 1 1 auto; min-height: 0; width: 100%; }

/* ---------- 代码小黑板：可直接编辑 ---------- */
.card-body { display: flex; flex: 1 1 auto; min-height: 0; }
.card-code {
  flex: 1 1 auto; margin: 0; padding: 6px 8px; min-height: 0;
  font: 11.5px/1.45 ui-monospace, Consolas, "Cascadia Mono", "Microsoft YaHei Mono", monospace;
  white-space: pre; overflow: auto; outline: none;
  color: var(--text); caret-color: var(--accent); cursor: text;
}
.card-code:focus { background: rgba(255,255,255,.035); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 35%, transparent); }

/* ---------- 课件列表 / 页码直达 ---------- */
.cw-list { display: flex; flex-direction: column; gap: 4px; margin-bottom: 6px; max-height: 150px; overflow: auto; }
.cw-item {
  text-align: left; padding: 5px 7px; border-radius: 7px; cursor: pointer;
  background: var(--chrome-2); border: 1px solid var(--border-2); color: var(--text);
  font-size: 11.5px; display: flex; justify-content: space-between; gap: 6px;
}
.cw-item b { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cw-item.on { border-color: var(--accent); background: var(--accent-soft); }
.pager-input {
  width: 42px; text-align: center; padding: 1px 2px; font-size: 11px;
  background: var(--chrome-deep); color: var(--text);
  border: 1px solid var(--border-2); border-radius: 4px;
}

/* 巡看详情：代码 + 本生错因并排 */
.pdetail-main { flex: 1 1 auto; display: flex; gap: 8px; min-height: 0; }
.pdetail-main #reviewEditor { flex: 1 1 auto; min-width: 0; }
.pdetail-diags { flex: 0 0 232px; display: flex; flex-direction: column; gap: 6px; min-height: 0;
  border-left: 1px solid var(--border); padding-left: 8px; }
.pdd-head { display: flex; align-items: center; gap: 6px; font-size: 12px; }
.pdd-count { font: 10px var(--font-mono); color: var(--red); }
.pdd-list { flex: 1 1 auto; overflow: auto; display: flex; flex-direction: column; gap: 6px; min-height: 0; }
.pdd-item { border: 1px solid var(--border); border-radius: 8px; padding: 7px 8px; background: rgba(255,255,255,.02); }
.pdd-top { display: flex; justify-content: space-between; gap: 6px; font-size: 11px; }
.pdd-top b { font-weight: 600; }
.pdd-top span { color: var(--red); font: 10px var(--font-mono); flex: none; }
.pdd-item p { margin: 4px 0 2px; font: 10px/1.45 ui-monospace, Consolas, monospace; color: var(--text-mute); word-break: break-all; }
.pdd-item em { font-style: normal; font-size: 10px; color: var(--text-faint); line-height: 1.45; display: block; }
.pdd-empty { padding: 8px 2px; font-size: 11px; }
.pdd-foot { font-size: 9.5px; line-height: 1.4; }
.badge.err { background: rgba(224,96,96,.18); color: #ff9b9b; border: 1px solid rgba(224,96,96,.32); }

/* ---------- 账户注册 / 登录 ---------- */
.auth-card { width: 360px; max-height: 92vh; overflow: auto; }
.join-tabs { display: flex; gap: 6px; margin: 4px 0 8px; border-bottom: 1px solid var(--border); }
.join-tab { flex: 1; padding: 7px 0; font-size: 13px; background: none; color: var(--text-mute); border: 0; border-bottom: 2px solid transparent; cursor: pointer; }
.join-tab.on { color: var(--text); border-bottom-color: var(--accent); }
.join-tab[hidden], .join-tabs[hidden] { display: none; }
.auth-card select.ipt { appearance: auto; }
.auth-card .ghost.wide { margin-top: 8px; }
.join-account-line { font-size: 13px; margin: 6px 0 2px; }
.join-role { font-size: 10.5px; color: var(--accent); border: 1px solid var(--accent-soft); border-radius: 999px; padding: 1px 7px; margin-left: 6px; }
.join-divider { display: flex; align-items: center; gap: 8px; margin: 16px 0 4px; color: var(--text-faint); font-size: 10.5px; }
.join-divider::before, .join-divider::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.join-divider span { flex: none; }

.join-auth-link { display: block; text-align: center; text-decoration: none; box-sizing: border-box; }

.logout-chip {
  height: 24px; padding: 0 9px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--border-2); background: transparent;
  color: var(--text-faint); font-size: 10.5px; letter-spacing: .04em;
}
.logout-chip:hover { color: #e2c176; border-color: var(--gold-soft); }
.logout-chip[hidden] { display: none; }


.panel-account { margin-top: 14px; padding-top: 10px; border-top: 1px solid var(--border); }
.panel-account h3 { margin-top: 0; }
.panel-link { display: block; box-sizing: border-box; text-align: center; text-decoration: none; color: var(--text-mute); border: 1px solid var(--border-2); border-radius: 6px; padding: 7px 0; font-size: 12px; }
.panel-link:hover { color: var(--gold); border-color: var(--gold-soft); }