:root {
  --primary: #2563eb;
  --primary-light: #eff6ff;
  --bg: #f3f4f6;
  --card: #ffffff;
  --bg-soft: #f8fafc;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --danger: #ef4444;
  --warning: #f59e0b;
  --success: #22c55e;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px;
}
.app { display: flex; height: 100vh; overflow: hidden; }
/* 未登录时隐藏应用主体。必须显式写这条：.app 自带 display:flex，
   不带后缀的 .hidden 特异性不够，会被它盖掉。 */
.app.hidden { display: none; }

/* 侧边栏 */
.sidebar {
  width: 220px; background: var(--card); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; padding: 18px 14px;
}
.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 24px; }
.logo {
  width: 34px; height: 34px; border-radius: 8px; background: var(--primary);
  color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 16px;
}
.brand-text strong { display: block; font-size: 16px; color: var(--primary); }
.brand-text small { color: var(--muted); font-size: 11px; }
.nav { display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 11px 12px;
  border: none; background: transparent; border-radius: 8px; color: var(--muted);
  font-size: 14px; cursor: pointer; transition: .15s;
}
.nav-item:hover { background: var(--bg); color: var(--text); }
.nav-item.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.icon { width: 20px; text-align: center; font-size: 16px; }

/* 主区 */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  height: 60px; background: var(--card); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; padding: 0 22px;
}
.topbar-left { display: flex; align-items: center; gap: 14px; }
.topbar-left h1 { font-size: 18px; font-weight: 600; }
.menu-btn {
  display: none; background: none; border: none; font-size: 20px; color: var(--muted); cursor: pointer;
}
.topbar-right { display: flex; align-items: center; gap: 18px; }
.lang-picker {
  display: flex; align-items: center; gap: 8px; background: var(--card);
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; color: var(--muted); font-size: 13px;
}
.lang-picker select { border: none; background: transparent; font-size: 13px; color: var(--text); outline: none; }
.btn-sm { background: #1f2937; color: #fff; border: none; border-radius: 6px; padding: 5px 12px; font-size: 12px; cursor: pointer; }
.user { display: flex; align-items: center; gap: 8px; color: var(--muted); }
.avatar {
  width: 30px; height: 30px; border-radius: 50%; background: var(--border);
  display: grid; place-items: center; font-size: 12px; color: var(--muted);
}

/* 内容区 */
.content { flex: 1; overflow-y: auto; padding: 22px; }
.view-title { font-size: 20px; font-weight: 600; margin-bottom: 18px; }

/* 卡片 */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 22px; }
.stat-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; display: flex; flex-direction: column; gap: 8px; position: relative;
}
.stat-card .stat-reset {
  position: absolute; top: 10px; right: 10px;
  width: 26px; height: 26px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--card); color: var(--muted); font-size: 14px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0.55; transition: all 0.15s;
}
.stat-card .stat-reset:hover {
  opacity: 1; color: var(--danger, #dc2626); border-color: #fca5a5; background: #fef2f2;
}
.stat-card .label { color: var(--muted); font-size: 13px; }
.stat-card .value { font-size: 30px; font-weight: 700; }
.stat-card .value-row { display: flex; align-items: baseline; gap: 8px; }
.stat-card .badge {
  font-size: 11px; background: #fef3c7; color: #b45309; padding: 2px 8px; border-radius: 12px;
}

/* 面板 */
.panels { display: grid; grid-template-columns: 1fr; gap: 18px; }
.panel {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px;
}
.panel h2 { font-size: 15px; font-weight: 600; margin-bottom: 14px; }

/* 学习看板（B 批） */
.dash-board { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.dash-mini { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 16px; }
.dash-mini .mini { background: var(--bg-soft); border-radius: 10px; padding: 12px; text-align: center; }
.dash-mini .mini-v { font-size: 22px; font-weight: 700; color: var(--primary); }
.dash-mini .mini-l { font-size: 11px; color: #94a3b8; margin-top: 4px; }
.dash-chart-title { font-size: 12px; color: #64748b; margin-bottom: 6px; }
.dash-chart { width: 100%; height: 110px; background: var(--bg-soft); border-radius: 8px; padding: 6px; box-sizing: border-box; }
.dash-top { margin-top: 14px; }
.dash-top .top-list { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.dash-top .top-item { display: flex; justify-content: space-between; font-size: 13px; }
.dash-top .top-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 70%; }
.dash-top .top-c { color: var(--primary); font-weight: 600; }
.dash-total { margin-top: 14px; font-size: 12px; color: #64748b; border-top: 1px dashed var(--border); padding-top: 10px; }

/* 列表 */
.list { display: flex; flex-direction: column; gap: 10px; }
.list-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 0; border-bottom: 1px solid var(--border);
}
.list-item:last-child { border-bottom: none; }
.list-item .left { display: flex; flex-direction: column; gap: 4px; }
.list-item .title { font-weight: 500; font-size: 14px; }
.list-item .meta { color: var(--muted); font-size: 12px; }
.list-item .right { display: flex; align-items: center; gap: 10px; }
.list-item .summ { margin-top: 6px; color: var(--primary); font-size: 13px; line-height: 1.5; }
.icon-btn {
  background: none; border: none; color: var(--danger); font-size: 18px; cursor: pointer; padding: 4px;
}
.status { font-size: 12px; color: var(--success); }

/* 课件管理 */
.upload-zone {
  border: 2px dashed var(--border); border-radius: 12px; padding: 36px;
  text-align: center; color: var(--muted); background: var(--card); margin-bottom: 18px;
  cursor: pointer; transition: .15s;
}
.upload-zone:hover { border-color: var(--primary); background: var(--primary-light); }
.upload-zone input { display: none; }
.file-table { width: 100%; border-collapse: collapse; }
.file-table th, .file-table td { text-align: left; padding: 12px; border-bottom: 1px solid var(--border); font-size: 13px; }
.file-table th { color: var(--muted); font-weight: 500; }
.tag {
  display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px;
  background: var(--primary-light); color: var(--primary);
}

/* AI 导师 */
.tutor-wrap { display: flex; flex-direction: column; height: calc(100vh - 170px); }

/* —— 顶部工具条 —— */
.tutor-toolbar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 10px 14px; margin-bottom: 12px;
}
.tutor-toolbar .course-select {
  background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 12px; font-size: 13px; min-width: 220px; max-width: 300px; color: var(--text);
  flex: 1 1 auto;
}
.tutor-toolbar .course-select:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.btn-toolbar {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--card); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 14px; font-size: 13px; cursor: pointer;
  white-space: nowrap;
}
.btn-toolbar:hover { background: var(--bg-soft); border-color: #cbd5e1; }
.btn-toolbar:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-toolbar .ico { font-size: 14px; }
.btn-toolbar-primary {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
.btn-toolbar-primary:hover { background: #1d4ed8; border-color: #1d4ed8; color: #fff; }

/* —— 空状态 —— */
.tutor-empty {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; color: #64748b; padding: 40px 20px;
}
.tutor-empty-icon {
  font-size: 64px; line-height: 1; margin-bottom: 18px; opacity: 0.55;
  display: flex; align-items: center; gap: 4px; filter: grayscale(0.2);
}
.tutor-empty-title { font-size: 18px; color: #334155; margin-bottom: 8px; font-weight: 500; }
.tutor-empty-sub { font-size: 13px; color: #94a3b8; max-width: 440px; line-height: 1.6; }

/* —— 出题块（卡片） —— */
.quiz-block {
  background: linear-gradient(180deg, #f0f9ff 0%, #ffffff 100%);
  border: 1px solid #bae6fd; border-radius: 14px;
  padding: 16px 18px; align-self: stretch; max-width: 100%;
}
.quiz-head {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; margin-bottom: 12px; flex-wrap: wrap;
  border-bottom: 1px dashed #cbd5e1; padding-bottom: 12px;
}
.quiz-title { font-size: 14px; color: #334155; font-weight: 600; }
.quiz-tools { display: flex; gap: 8px; flex-wrap: wrap; }
.quiz-body { display: flex; flex-direction: column; gap: 16px; }
.q-item {
  background: var(--card); border: 1px solid #e2e8f0; border-radius: 10px;
  padding: 14px 16px; transition: border-color 0.2s;
}
.q-item.collected { background: #f0fdf4; border-color: #86efac; opacity: 0.85; }
.q-stem { font-size: 14px; color: #1e293b; margin-bottom: 10px; line-height: 1.6; }
.q-options { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.q-opt {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px; border-radius: 8px; cursor: pointer; font-size: 13.5px; color: #334155;
  border: 1px solid transparent;
}
.q-opt:hover { background: var(--bg-soft); border-color: #e2e8f0; }
.q-opt input { accent-color: var(--primary); }
.q-explain {
  margin: 8px 0; padding: 10px 12px; background: #ecfeff;
  border-left: 3px solid var(--primary); border-radius: 6px;
  font-size: 13px; color: #0c4a6e; line-height: 1.6;
}
.q-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* —— Toast 提示 —— */
.toast {
  position: fixed; left: 50%; bottom: 32px; transform: translateX(-50%) translateY(20px);
  background: rgba(15, 23, 42, 0.92); color: #fff; padding: 10px 20px;
  border-radius: 999px; font-size: 13px; opacity: 0;
  transition: opacity 0.2s, transform 0.2s; z-index: 9999;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.chat { display: flex; flex-direction: column; height: calc(100vh - 170px); }
.chat-history {
  flex: 1; overflow-y: auto; background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 18px; margin-bottom: 14px; display: flex; flex-direction: column; gap: 14px;
}
.bubble { max-width: 80%; padding: 12px 14px; border-radius: 12px; line-height: 1.6; }
.bubble.user { align-self: flex-end; background: var(--primary); color: #fff; border-bottom-right-radius: 4px; }
.bubble.ai { align-self: flex-start; background: var(--bg); border-bottom-left-radius: 4px; }
.bubble.ai.bubble-rich { max-width: 92%; min-width: 280px; background: var(--card); border: 1px solid var(--border); }

/* ===== Markdown 富文本（.md-body） ===== */
.md-body { font-size: 14px; color: var(--text); word-break: break-word; }
.md-body > :first-child { margin-top: 0; }
.md-body > :last-child { margin-bottom: 0; }
.md-body h1, .md-body h2, .md-body h3, .md-body h4 { margin: 14px 0 8px; line-height: 1.4; color: var(--text); }
.md-body h1 { font-size: 19px; } .md-body h2 { font-size: 17px; border-left: 3px solid var(--primary); padding-left: 8px; }
.md-body h3 { font-size: 15px; } .md-body h4 { font-size: 14px; }
.md-body p { margin: 8px 0; }
.md-body ul, .md-body ol { margin: 8px 0; padding-left: 22px; }
.md-body li { margin: 4px 0; }
.md-body strong { color: var(--primary); font-weight: 600; }
.md-body blockquote {
  margin: 8px 0; padding: 8px 12px; background: var(--primary-light);
  border-left: 3px solid var(--primary); border-radius: 0 8px 8px 0; color: var(--text);
}
.md-body blockquote p { margin: 0; }
.md-body code {
  background: var(--bg-soft); color: #dc2626; border-radius: 4px;
  padding: 1px 6px; font-size: 13px; font-family: "SF Mono", Consolas, monospace;
}
.md-body pre {
  background: #0f172a; color: #e2e8f0; border-radius: 10px;
  padding: 14px; overflow-x: auto; margin: 10px 0;
}
.md-body pre code { background: none; color: inherit; padding: 0; font-size: 13px; line-height: 1.6; }
.md-body table { border-collapse: collapse; margin: 10px 0; width: 100%; font-size: 13px; }
.md-body th, .md-body td { border: 1px solid var(--border); padding: 7px 10px; text-align: left; }
.md-body th { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.md-body tr:nth-child(even) td { background: var(--bg-soft); }
.md-body hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }
.md-body img { max-width: 100%; border-radius: 8px; }
.md-body a { color: var(--primary); }
.katex-wrap.katex-display { display: block; text-align: center; margin: 10px 0; overflow-x: auto; }
.katex { font-size: 1.05em; }

/* ===== Obsidian 笔记卡片 ===== */
.obsidian-card {
  margin: 12px 0; border: 1px solid #c4b5fd; border-radius: 12px;
  background: linear-gradient(180deg, #faf8ff 0%, #fff 100%); overflow: hidden;
}
.obsidian-head {
  display: flex; align-items: center; gap: 8px; padding: 10px 14px;
  background: #f3effe; border-bottom: 1px solid #e9e2fd;
}
.obsidian-icon { font-size: 17px; }
.obsidian-title { font-weight: 700; font-size: 14px; color: #6d28d9; flex: 1; }
.obsidian-dl {
  border: none; background: #7c3aed; color: #fff; border-radius: 7px;
  padding: 5px 12px; font-size: 12px; cursor: pointer; white-space: nowrap;
}
.obsidian-dl:hover { background: #6d28d9; }
.obsidian-tags { padding: 8px 14px 0; display: flex; flex-wrap: wrap; gap: 6px; }
.obsidian-tag {
  background: #ede9fe; color: #7c3aed; border-radius: 999px;
  padding: 2px 10px; font-size: 12px; font-weight: 500;
}
.obsidian-body { padding: 6px 14px 14px; }

/* ===== 思维导图卡片 ===== */
.mindmap-card {
  margin: 12px 0; border: 1px solid #a7f3d0; border-radius: 12px;
  background: var(--card); overflow: hidden;
}
.mindmap-head {
  display: flex; align-items: center; gap: 8px; padding: 10px 14px;
  background: #ecfdf5; border-bottom: 1px solid #d1fae5;
}
.mindmap-icon { font-size: 17px; }
.mindmap-title { font-weight: 700; font-size: 14px; color: #047857; flex: 1; }
.mindmap-dl {
  border: none; background: #059669; color: #fff; border-radius: 7px;
  padding: 5px 12px; font-size: 12px; cursor: pointer; white-space: nowrap;
}
.mindmap-dl:hover { background: #047857; }
.mindmap-box { height: 420px; background: #fcfcfd; }
.mindmap-svg { width: 100%; height: 100%; display: block; }

/* ===== 特殊块流式生成占位 ===== */
.block-pending {
  margin: 10px 0; padding: 14px; border: 1px dashed var(--border); border-radius: 10px;
  color: var(--muted); font-size: 13px; background: var(--bg-soft);
  animation: pending-blink 1.2s ease-in-out infinite;
}
@keyframes pending-blink { 0%,100% { opacity: 1; } 50% { opacity: 0.45; } }

/* ===== 空状态提示 chip ===== */
.tutor-empty-tips { margin-top: 10px; }
.tip-chip {
  display: inline-block; background: var(--primary-light); color: var(--primary);
  border-radius: 999px; padding: 4px 12px; font-size: 12px; margin: 0 4px; font-weight: 500;
  border: none; cursor: pointer; font-family: inherit; line-height: 1.6;
  transition: transform .1s ease, filter .15s ease;
}
.tip-chip:hover { filter: brightness(0.92); transform: translateY(-1px); }
.tip-chip:active { transform: translateY(0); }
.tip-chip:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.chat-input {
  display: flex; gap: 10px; background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 10px;
}
.chat-input input { flex: 1; border: none; outline: none; font-size: 14px; padding: 8px; }
.chat-input button { background: var(--primary); color: #fff; border: none; border-radius: 8px; padding: 8px 18px; cursor: pointer; }

/* 错题本 */
.mistake-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 14px; margin-bottom: 10px;
}
.mistake-card h4 { font-size: 14px; margin-bottom: 8px; }
.mistake-card p { color: var(--muted); font-size: 13px; margin-bottom: 8px; line-height: 1.5; }
.mistake-card .tags { display: flex; gap: 6px; }

/* 语音笔记 */
.recorder {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 30px; text-align: center; margin-bottom: 18px;
}
.rec-btn {
  width: 64px; height: 64px; border-radius: 50%; border: none; background: var(--primary);
  color: #fff; font-size: 24px; cursor: pointer; box-shadow: 0 4px 14px rgba(37,99,235,.35);
}
.rec-btn.recording { background: var(--danger); animation: pulse 1.2s infinite; }
@keyframes pulse { 0%,100%{transform:scale(1)} 50%{transform:scale(1.08)} }

/* 文献翻译 */
.translator { display: grid; grid-template-areas: "toolbar toolbar" "src dst"; grid-template-columns: 1fr 1fr; grid-template-rows: auto 1fr; gap: 16px; height: calc(100vh - 170px); }
.trans-toolbar { grid-area: toolbar; }
.trans-box:nth-child(2) { grid-area: src; }
.trans-box:nth-child(3) { grid-area: dst; min-height: 400px; }
.trans-box {
  display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
}
.trans-box .head { padding: 12px 14px; border-bottom: 1px solid var(--border); color: var(--muted); font-size: 13px; }
.trans-box textarea { flex: 1; border: none; outline: none; padding: 14px; font-size: 14px; resize: none; }
.trans-box .output { flex: 1; padding: 14px; overflow-y: auto; line-height: 1.6; }
.trans-actions { display: flex; justify-content: flex-end; padding: 10px; border-top: 1px solid var(--border); }

/* 设置 */
.setting-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.setting-row .info h4 { font-size: 14px; margin-bottom: 4px; }
.setting-row .info p { color: var(--muted); font-size: 12px; }
.toggle {
  width: 44px; height: 24px; border-radius: 12px; background: var(--border); position: relative; cursor: pointer; transition: .2s;
}
.toggle::after { content: ""; position: absolute; top: 2px; left: 2px; width: 20px; height: 20px; border-radius: 50%; background: #fff; transition: .2s; }
.toggle.on { background: var(--primary); }
.toggle.on::after { left: 22px; }

/* 按钮 */
.btn-primary { background: var(--primary); color: #fff; border: none; border-radius: 8px; padding: 9px 18px; cursor: pointer; font-size: 13px; }
.btn-secondary { background: var(--card); color: var(--text); border: 1px solid var(--border); border-radius: 8px; padding: 8px 16px; cursor: pointer; font-size: 13px; }
.btn-danger { background: var(--danger); color: #fff; border: none; border-radius: 8px; padding: 8px 16px; cursor: pointer; font-size: 13px; }

/* 弹窗 */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.35); display: grid; place-items: center; z-index: 100;
}
.modal.hidden { display: none; }
.modal-body { background: var(--card); padding: 22px; border-radius: 12px; min-width: 280px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

@media (max-width: 900px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .panels { grid-template-columns: 1fr; }
  .translator { grid-template-columns: 1fr; height: auto; }
  .sidebar { position: absolute; z-index: 50; height: 100%; transform: translateX(-100%); transition: .2s; }
  .sidebar.open { transform: translateX(0); }
  .menu-btn { display: block; }
}

/* ===== 课件管理（课程组 + 文件） ===== */
.courses-wrap { padding: 0 0 24px; }
.courses-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 18px;
}
.courses-title { font-size: 20px; font-weight: 600; color: var(--text); }
.courses-tools { display: flex; gap: 10px; }
.courses-tools .btn-primary {
  background: var(--primary); color: #fff; border: 1px solid var(--primary);
  border-radius: 8px; padding: 8px 16px; cursor: pointer; font-size: 13px;
}
.courses-tools .btn-primary:hover { background: #1d4ed8; border-color: #1d4ed8; }
.courses-tools .btn-secondary {
  background: var(--card); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 16px; cursor: pointer; font-size: 13px;
}
.courses-tools .btn-secondary:hover { background: var(--bg-soft); border-color: #cbd5e1; }

.courses-empty { padding: 40px 24px; text-align: center; color: #94a3b8; font-size: 13px; }

.courses-groups {
  display: flex; flex-direction: column; gap: 14px; margin-bottom: 30px;
}
.group-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px; display: flex; flex-direction: column; gap: 10px;
  transition: box-shadow 0.15s, border-color 0.15s;
}
.group-card:hover { border-color: #cbd5e1; box-shadow: 0 2px 10px rgba(0,0,0,0.04); }
.group-card-head { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.group-card-title { font-weight: 600; font-size: 15px; color: var(--text); flex: 1;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.group-card-meta { font-size: 13px; color: #64748b; }
.icon-btn-small {
  background: transparent; border: none; cursor: pointer; padding: 4px 6px;
  color: #94a3b8; font-size: 14px; border-radius: 6px;
}
.icon-btn-small:hover { background: #fee2e2; color: #ef4444; }
.group-upload-btn {
  align-self: stretch;
  background: transparent; color: var(--primary);
  border: 1px dashed var(--primary); border-radius: 8px;
  padding: 8px 0; font-size: 13px; cursor: pointer;
}
.group-upload-btn:hover { background: var(--primary-light); }

/* 课程卡：折叠/展开 + 课件紧凑行 + ⋯ 菜单 */
.group-card.virtual { border-style: dashed; }
.group-toggle {
  background: transparent; border: none; cursor: pointer;
  padding: 2px 6px; color: #64748b; font-size: 14px; line-height: 1;
  border-radius: 4px; flex-shrink: 0;
}
.group-toggle:hover { background: var(--bg-soft); color: var(--text); }
.group-toggle-arrow { display: inline-block; transition: transform 0.15s; }
.group-toggle-arrow.collapsed { transform: rotate(-90deg); }
.group-card-virtual-tag {
  display: inline-block; margin-left: 6px; padding: 0 6px;
  background: var(--bg-soft); color: #94a3b8;
  border-radius: 8px; font-size: 11px; font-weight: 400;
  vertical-align: middle;
}
.group-card-meta {
  font-size: 12px; color: #64748b; margin-bottom: 4px;
  padding-left: 30px;
}
.group-card-body { display: flex; flex-direction: column; gap: 8px; }
.group-card-files { display: flex; flex-direction: column; gap: 6px; }
.group-card-empty {
  padding: 16px; text-align: center; color: #cbd5e1; font-size: 13px;
  background: var(--bg-soft); border-radius: 8px;
}

/* 紧凑文件行（替代旧的 720px 宽版本） */
.file-row {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg-soft); border: 1px solid transparent; border-radius: 8px;
  padding: 8px 12px; transition: border-color 0.15s, background 0.15s;
  min-height: 44px;
}
.file-row:hover { border-color: var(--border); background: var(--card); }
.file-icon { font-size: 18px; flex-shrink: 0; cursor: pointer; }
.file-info { flex: 1; min-width: 0; cursor: pointer; }
.file-name {
  font-size: 13.5px; color: var(--text); font-weight: 500;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  cursor: pointer; line-height: 1.4;
}
.file-name:hover { color: var(--primary); }
.file-meta {
  display: flex; gap: 8px; align-items: center; font-size: 11.5px;
  color: #64748b; margin-top: 2px; flex-wrap: wrap; line-height: 1.4;
}
.file-actions { display: flex; gap: 6px; flex-shrink: 0; align-items: center; }

/* ⋯ 菜单 */
.file-menu-wrap { position: relative; }
.file-menu {
  position: absolute; top: 100%; right: 0; margin-top: 4px;
  min-width: 200px; background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  padding: 6px; z-index: 50; display: flex; flex-direction: column; gap: 2px;
}
.file-menu button {
  background: transparent; border: none; padding: 8px 12px;
  font-size: 13px; color: var(--text); text-align: left;
  border-radius: 6px; cursor: pointer;
}
.file-menu button:hover { background: var(--bg-soft); }
.file-menu button.danger { color: #dc2626; }
.file-menu button.danger:hover { background: #fee2e2; }
.file-menu-sep { height: 1px; background: var(--border); margin: 4px 6px; }
.file-menu-label {
  font-size: 11px; color: #94a3b8; padding: 4px 12px 2px;
}
.file-menu .move-select {
  width: 100% !important; min-width: 0 !important; flex: 1 1 auto !important;
  font-size: 13px;
}

.courses-files { display: none; }  /* 旧「全部文件」区不再渲染（JS 也不再写入）*/
.courses-files-head {
  font-size: 14px; font-weight: 600; color: #334155;
  padding: 10px 0; border-top: 1px solid var(--border); margin-top: 8px;
}
.courses-files-list { display: flex; flex-direction: column; gap: 8px; }
.file-row {
  display: flex; align-items: center; gap: 14px;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px; transition: border-color 0.15s;
}
.file-row:hover { border-color: #cbd5e1; }
.file-icon { font-size: 22px; flex-shrink: 0; }
.file-info { flex: 1; min-width: 0; }
.file-name {
  font-size: 14px; color: var(--text); font-weight: 500;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.file-meta {
  display: flex; gap: 10px; align-items: center; font-size: 12px;
  color: #64748b; margin-top: 4px; flex-wrap: wrap;
}
.file-actions { display: flex; gap: 8px; flex-shrink: 0; align-items: center; }

.badge-group {
  background: var(--primary-light); color: var(--primary);
  padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 500;
}
.badge-group.muted { background: var(--bg-soft); color: #94a3b8; }

.move-select {
  background: var(--card); border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 10px; font-size: 12px; color: var(--text); cursor: pointer;
}
.move-select:focus { outline: 2px solid var(--primary); outline-offset: -1px; }

.btn-danger {
  background: transparent; color: #ef4444; border: 1px solid transparent;
  border-radius: 6px; padding: 5px 10px; cursor: pointer; font-size: 13px;
}
.btn-danger:hover { background: #fee2e2; }

.courses-files-foot {
  margin-top: 8px; padding: 10px 0;
}

/* ===== 弹窗 ===== */
.modal-mask {
  position: fixed; inset: 0; background: rgba(15, 23, 42, 0.45);
  display: flex; align-items: center; justify-content: center; z-index: 9999;
}
.modal-box {
  background: var(--card); border-radius: 14px; padding: 24px;
  width: 380px; max-width: 90vw; box-shadow: 0 20px 60px rgba(0,0,0,0.15);
  animation: modalIn 0.18s ease-out;
}
.modal-box-wide { width: 640px; max-width: 95vw; max-height: 80vh; display: flex; flex-direction: column; }
.modal-box-wide .modal-body { flex: 1; overflow: auto; }
@keyframes modalIn {
  from { opacity: 0; transform: translateY(-8px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-title { font-size: 17px; font-weight: 600; color: var(--text); margin-bottom: 16px; }
.modal-title.danger { color: var(--danger); }
.modal-body { margin-bottom: 18px; font-size: 14px; color: var(--text); }
.modal-body input[type=text], .modal-body input:not([type]), .modal-body select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; background: var(--card); outline: none;
}
.modal-body input:focus, .modal-body select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.modal-hint { font-size: 12px; color: #94a3b8; margin-top: 8px; }
.modal-label { display: block; font-size: 13px; color: #475569; margin: 12px 0 6px; }
.upload-file-info {
  padding: 10px 12px; background: var(--bg-soft); border-radius: 8px; font-size: 13px;
  color: var(--text);
}
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }
.modal-actions .btn-primary {
  background: var(--primary); color: #fff; border: 1px solid var(--primary);
  border-radius: 8px; padding: 8px 18px; cursor: pointer; font-size: 13px;
}
.modal-actions .btn-primary:hover { background: #1d4ed8; border-color: #1d4ed8; }
.modal-actions .btn-secondary {
  background: var(--card); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 18px; cursor: pointer; font-size: 13px;
}
.modal-actions .btn-secondary:hover { background: var(--bg-soft); }

.content-meta {
  background: var(--bg-soft); padding: 10px 14px; border-radius: 8px; margin-bottom: 12px;
  font-size: 13px; color: #334155;
}
.content-text {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px;
  padding: 16px; max-height: 50vh; overflow: auto;
  font-family: ui-monospace, 'SFMono-Regular', 'Cascadia Code', monospace;
  font-size: 13px; line-height: 1.7; white-space: pre-wrap; word-break: break-word;
  color: #1e293b;
}

/* ===== 聊天线程标识条 ===== */
.thread-bar {
  display: flex; align-items: center; gap: 8px;
  background: var(--primary-light); border: 1px solid #bfdbfe;
  border-radius: 10px; padding: 8px 14px; margin-bottom: 12px;
}
.thread-ico { font-size: 15px; }
.thread-name { font-weight: 700; font-size: 13px; color: var(--primary); }
.thread-desc { font-size: 12px; color: var(--muted); margin-left: auto; }

/* ===== 批量上传进度面板 ===== */
.upload-progress {
  position: fixed; right: 24px; bottom: 24px; z-index: 9998;
  width: 380px; max-width: calc(100vw - 48px);
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.18);
  padding: 16px; font-size: 13px;
}
.up-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.up-title { font-weight: 700; color: var(--text); }
.up-count { color: var(--muted); font-size: 12px; }
.up-bar {
  height: 6px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; margin-bottom: 12px;
}
.up-bar-fill {
  height: 100%; width: 0; background: linear-gradient(90deg, #2563eb, #0ea5e9);
  border-radius: 999px; transition: width 0.25s ease;
}
.up-list { max-height: 240px; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }
.up-row {
  display: flex; align-items: center; gap: 8px; padding: 5px 8px;
  border-radius: 8px; background: var(--bg-soft); font-size: 12px;
}
.up-ico { width: 18px; text-align: center; flex: none; }
.up-ico-run { animation: pending-blink 1.2s ease-in-out infinite; }
.up-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); }
.up-msg { color: var(--muted); font-size: 11px; flex: none; max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.up-actions { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; gap: 8px; }
.up-summary { font-size: 12px; font-weight: 600; color: var(--text); }
.up-actions button { font-size: 12px; padding: 6px 12px; }

/* ===== 侧边栏悬浮提示（Tooltip）===== */
.nav-item { position: relative; }
.nav-item[data-tip]:hover::after {
  content: attr(data-tip);
  position: absolute; left: calc(100% + 14px); top: 50%;
  transform: translateY(-50%);
  background: #1e293b; color: #f8fafc;
  padding: 9px 13px; border-radius: 9px;
  font-size: 12px; line-height: 1.55; font-weight: 400;
  max-width: 300px; width: max-content;
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.22);
  z-index: 9999;
  pointer-events: none;
  animation: tipIn 0.16s ease;
}
.nav-item[data-tip]:hover::before {
  content: '';
  position: absolute; left: calc(100% + 8px); top: 50%;
  transform: translateY(-50%);
  border: 6px solid transparent; border-right-color: #1e293b;
  z-index: 9999; pointer-events: none;
  animation: tipIn 0.16s ease;
}
@keyframes tipIn {
  from { opacity: 0; transform: translate(6px, -50%); }
  to   { opacity: 1; transform: translate(0, -50%); }
}

/* ===== 错题本：课程选择 + 双模式 ===== */
.mistakes-toolbar {
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap;
}
.mistakes-toolbar .course-select { min-width: 200px; }
.mistake-modes { display: flex; gap: 6px; }
.mistake-mode-btn {
  border: 1px solid var(--border); background: var(--card); color: var(--muted);
  border-radius: 999px; padding: 6px 14px; font-size: 13px; cursor: pointer;
}
.mistake-mode-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.mistake-list { display: flex; flex-direction: column; gap: 12px; }

/* 错题卡片 */
.mistake-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.mistake-card h4 { font-size: 14.5px; margin: 8px 0; line-height: 1.6; }
.mk-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.mk-qtype {
  background: #eef2ff; color: #4f46e5; border-radius: 6px;
  padding: 2px 8px; font-size: 12px; font-weight: 600;
}
.mk-mastery { border-radius: 999px; padding: 2px 10px; font-size: 12px; font-weight: 600; }
.mk-mastery.master-ok { background: #dcfce7; color: #15803d; }
.mk-mastery.master-warn { background: #fef3c7; color: #b45309; }
.mk-course { color: var(--muted); font-size: 12px; }
.mk-count { color: var(--muted); font-size: 12px; margin-left: auto; }
.mk-detail { font-size: 12px; margin-bottom: 6px; }
.mk-answer { background: var(--bg-soft); border-left: 3px solid #94a3b8; padding: 8px 12px; border-radius: 0 8px 8px 0; font-size: 13px; margin: 6px 0; }
.mk-reason { font-size: 13px; color: var(--muted); margin: 4px 0; }

/* 历史作答记录 */
.mk-history { margin-top: 10px; border-top: 1px dashed var(--border); padding-top: 8px; }
.mk-hist-title { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.mk-hist-row { display: flex; align-items: center; gap: 8px; font-size: 12px; padding: 4px 8px; border-radius: 6px; margin-bottom: 4px; }
.mk-hist-row.hist-ok { background: #f0fdf4; }
.mk-hist-row.hist-bad { background: #fef2f2; }
.mk-time { color: var(--muted); flex: none; }
.mk-score { font-weight: 700; flex: none; }
.mk-mark { flex: none; }
.mk-comment { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mk-hist-empty { color: var(--muted); font-size: 12px; padding: 4px 0; }

/* 答题模式 */
.mistake-card.practice { border-color: #bfdbfe; }
.mk-answer-input { margin-top: 10px; display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.choice-btns { display: flex; gap: 8px; }
.choice-btn {
  min-width: 52px; padding: 8px 14px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--card); font-size: 14px; font-weight: 600; cursor: pointer; transition: all 0.12s;
}
.choice-btn:hover { border-color: var(--primary); color: var(--primary); }
.choice-btn.selected { background: var(--primary); color: #fff; border-color: var(--primary); }
.concept-input { width: 100%; padding: 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 13.5px; resize: vertical; font-family: inherit; }
.concept-input:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.mk-submit { align-self: flex-start; }
.mk-result { margin-top: 10px; width: 100%; }
.mk-result-box { border-radius: 10px; padding: 12px 14px; font-size: 13px; }
.mk-result-box.res-ok { background: #f0fdf4; border: 1px solid #bbf7d0; }
.mk-result-box.res-bad { background: #fef2f2; border: 1px solid #fecaca; }
.mk-result-score { font-size: 22px; font-weight: 800; margin-bottom: 4px; }
.mk-result-comment { margin-bottom: 6px; line-height: 1.5; }
.mk-result-mastery { font-size: 12px; }
.mk-result-tip { font-size: 11px; margin-top: 6px; }

/* ===== 错题本 v2：课件选择 + 筛选 + 行列表 + 弹窗 ===== */
.mistakes-toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.mistakes-toolbar .course-select { min-width: 260px; max-width: 420px; }
.mistake-filter {
  display: flex; align-items: center; gap: 10px; margin-bottom: 12px; flex-wrap: wrap;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px; padding: 10px 14px;
}
.mistake-filter input[type=text] {
  flex: 1; min-width: 180px; border: 1px solid var(--border); border-radius: 8px;
  padding: 7px 12px; font-size: 13px; outline: none; background: var(--card);
}
.mistake-filter input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
.mistake-filter select {
  border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px;
  font-size: 13px; background: var(--card); outline: none;
}
.mistake-count { color: var(--muted); font-size: 12px; margin-left: auto; }

.mistake-list { display: flex; flex-direction: column; gap: 10px; }
.mistake-row {
  display: flex; align-items: center; gap: 12px;
  background: var(--card); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; transition: border-color .15s;
}
.mistake-row:hover { border-color: #93c5fd; }
.mr-main { flex: 1; display: flex; align-items: center; gap: 10px; min-width: 0; }
.mr-qtype {
  flex: none; background: #eef2ff; color: #4f46e5; border-radius: 6px;
  padding: 2px 8px; font-size: 12px; font-weight: 600;
}
.mr-question {
  font-size: 14px; color: var(--text); overflow: hidden; text-overflow: ellipsis;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; line-height: 1.5;
}
.mr-side { display: flex; align-items: center; gap: 8px; flex: none; }
.mr-count { color: var(--muted); font-size: 12px; }
.mr-btn { padding: 5px 12px !important; font-size: 12.5px !important; }

/* 弹窗内题目区 */
.mk-ans-question { font-size: 15px; font-weight: 600; margin-bottom: 10px; line-height: 1.6; }
.mk-ans-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }

/* 让 [hidden] 属性优先级高于 display: flex */
[hidden] { display: none !important; }

/* ===== 错题批量删除 ===== */
.mistake-batchbar {
  display: flex; align-items: center; gap: 12px; margin-bottom: 12px;
  background: #fef2f2; border: 1px solid #fecaca; border-radius: 10px; padding: 10px 14px;
}
.mistake-batchbar .mr-select-all { font-size: 13px; color: var(--text); display: flex; align-items: center; gap: 6px; }
.mr-select-all input[type=checkbox] { accent-color: var(--danger, #dc2626); width: 15px; height: 15px; }
.mr-selected-count { font-size: 13px; color: var(--danger, #dc2626); font-weight: 600; }
.mistake-batchbar button { font-size: 13px; padding: 6px 14px; }
.mr-check { accent-color: var(--primary); width: 16px; height: 16px; flex: none; }
.mistake-row.batch-on { border-color: #fca5a5; }
.quiz-count-select { width: 88px !important; min-width: 0 !important; flex: 0 0 auto !important; }
.quiz-diff-select { width: 76px !important; min-width: 0 !important; flex: 0 0 auto !important; }
.quiz-lang-select { width: 84px !important; min-width: 0 !important; flex: 0 0 auto !important; }
.quiz-lang-badge {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 400;
  color: var(--brand, #4c6ef5);
  background: color-mix(in srgb, var(--brand, #4c6ef5) 12%, transparent);
  vertical-align: middle;
}

/* ===== 选择题选项内容 ===== */
.choice-options { display: flex; flex-direction: column; gap: 8px; width: 100%; }
.choice-opt {
  display: flex; align-items: flex-start; gap: 8px; text-align: left;
  border: 1px solid var(--border); border-radius: 10px; background: var(--card);
  padding: 10px 14px; font-size: 13.5px; line-height: 1.6; cursor: pointer;
  transition: all 0.12s; width: 100%;
}
.choice-opt b { color: var(--primary); flex: none; }
.choice-opt:hover { border-color: var(--primary); background: var(--primary-light); }
.choice-opt.selected { border-color: var(--primary); background: var(--primary-light); box-shadow: 0 0 0 2px rgba(37,99,235,.15); }
.opt-missing { font-size: 12px; margin-top: 2px; }
.mk-opt-list { display: flex; flex-direction: column; gap: 4px; margin: 8px 0; }
.mk-opt { font-size: 13px; padding: 6px 10px; border-radius: 8px; background: var(--bg-soft); line-height: 1.5; }
.mk-opt b { color: var(--muted); margin-right: 4px; }
.mk-opt.mk-opt-ans { background: #dcfce7; border: 1px solid #bbf7d0; }
.mk-opt.mk-opt-ans b { color: #15803d; }

/* ===== 长录音（MediaRecorder 分片） ===== */
.rec-time {
  font-size: 34px; font-weight: 800; color: var(--primary);
  margin: 8px 0 4px; font-variant-numeric: tabular-nums;
}
.rec-time.recording { color: var(--danger, #dc2626); }
.rec-status { color: var(--muted); font-size: 13px; margin-bottom: 10px; }
.rec-actions { display: flex; justify-content: center; gap: 10px; margin-bottom: 8px; }
.rec-live {
  margin-top: 8px; padding: 10px 14px; background: var(--bg-soft);
  border-radius: 10px; font-size: 13px; line-height: 1.7; color: var(--text);
  max-height: 140px; overflow-y: auto; text-align: left; white-space: pre-wrap;
  min-height: 30px; border: 1px dashed var(--border);
}
.rec-btn.paused { background: #d97706; box-shadow: 0 4px 14px rgba(217,119,6,.35); }

/* ===== 语音笔记绑定课件 ===== */
.voice-content { display: flex; flex-direction: column; gap: 16px; }
.voice-course-tag {
  background: #ecfdf5; border: 1px solid #a7f3d0; color: #047857;
  border-radius: 10px; padding: 10px 14px; font-size: 13px; font-weight: 600;
}
.voice-course {
  display: inline-block; background: #eef2ff; color: #4f46e5;
  border-radius: 6px; padding: 1px 8px; font-size: 12px; margin-bottom: 4px;
}

/* ===== 新手引导（聚光灯分步） ===== */
.ob-layer { position: fixed; inset: 0; z-index: 9500; }
.ob-spot {
  position: fixed; border-radius: 12px;
  box-shadow: 0 0 0 9999px rgba(15, 23, 42, 0.55);
  border: 2px solid #fff;
  transition: left .25s ease, top .25s ease, width .25s ease, height .25s ease;
  pointer-events: none;
}
.ob-bubble {
  position: fixed; z-index: 9501; width: 330px; max-width: calc(100vw - 40px);
  background: var(--card); border-radius: 14px; padding: 18px;
  box-shadow: 0 16px 48px rgba(15, 23, 42, 0.3);
  animation: obPop .22s ease;
}
@keyframes obPop { from { opacity: 0; transform: translateY(6px) scale(.98); } to { opacity: 1; } }
.ob-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: var(--primary); }
.ob-text { font-size: 13.5px; line-height: 1.7; color: var(--text); }
.ob-progress { display: flex; align-items: center; gap: 10px; margin: 14px 0 10px; }
.ob-progress .ob-bar-fill { height: 6px; background: var(--primary); border-radius: 999px; flex: 1; transition: width .25s; }
.ob-progress span { font-size: 12px; color: var(--muted); flex: none; }
.ob-actions { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.ob-actions button { border-radius: 8px; padding: 7px 14px; font-size: 13px; cursor: pointer; }
.ob-skip { border: none; background: transparent; color: var(--muted); }
.ob-skip:hover { color: #64748b; }
.ob-prev { border: 1px solid var(--border); background: var(--card); }
.ob-prev:hover { background: var(--bg-soft); }
.ob-next { border: none; background: var(--primary); color: #fff; font-weight: 600; }
.ob-next:hover { background: #1d4ed8; }

/* ===== 今日学习建议 + 学习统计 ===== */
.daily-tips { margin: 14px 0; }
.daily-tips-title { font-size: 13px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.daily-tips-card {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  background: var(--primary-light); border: 1px solid #bfdbfe; border-radius: 10px;
  padding: 11px 14px; font-size: 13.5px; color: var(--text); margin-bottom: 8px;
}
.daily-tips-card.clickable { cursor: pointer; }
.daily-tips-card.clickable:hover { border-color: var(--primary); box-shadow: 0 2px 10px rgba(37,99,235,.12); }
.daily-tips-arrow { color: var(--primary); font-weight: 700; flex: none; }
.daily-tips-loading { color: var(--muted); font-size: 13px; }
.stats-open-btn { margin-left: 12px; align-self: center; white-space: nowrap; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 14px; }
.stats-cell {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px; text-align: center;
}
.stats-num { font-size: 24px; font-weight: 800; color: var(--primary); }
.stats-label { font-size: 12px; color: var(--muted); margin-top: 2px; }
.stats-mastery { margin-bottom: 14px; }
.stats-mastery-row { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 6px; }
.stats-mastery-row b { color: var(--primary); }
.stats-bar { height: 8px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; }
.stats-bar-fill { height: 100%; background: linear-gradient(90deg, #10b981, #0ea5e9); border-radius: 999px; transition: width .4s; }
.stats-trend-title { font-size: 13px; font-weight: 700; margin: 4px 0 6px; }
.stats-top-title { font-size: 13px; font-weight: 700; margin: 12px 0 6px; }
.stats-top-list { display: flex; flex-direction: column; gap: 6px; }
.stats-top-item {
  display: flex; justify-content: space-between; background: var(--bg-soft);
  border-radius: 8px; padding: 8px 12px; font-size: 13px;
}
.stats-top-item b { color: var(--primary); }

/* ===== AI 参考材料（可点击） ===== */
.mat-chip {
  display: inline-block; background: var(--primary-light); color: var(--primary);
  border: 1px solid #bfdbfe; border-radius: 6px; padding: 1px 8px;
  font-size: 12px; font-weight: 600; cursor: pointer; margin: 0 2px;
  vertical-align: baseline; transition: all .12s;
}
.mat-chip:hover { background: var(--primary); color: #fff; }
.mat-box {
  margin: 4px 0 10px; border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg-soft); overflow: hidden;
}
.mat-head {
  display: flex; align-items: center; justify-content: space-between; width: 100%;
  border: none; background: transparent; padding: 8px 14px;
  font-size: 12.5px; font-weight: 600; color: var(--primary); cursor: pointer;
}
.mat-head:hover { background: var(--bg-soft); }
.mat-arrow { color: var(--muted); font-size: 11px; }
.mat-body { border-top: 1px dashed var(--border); padding: 4px 8px; }
.mat-row {
  display: flex; align-items: center; gap: 8px; padding: 7px 8px;
  border-radius: 8px; cursor: pointer; font-size: 12.5px; transition: background .12s;
}
.mat-row:hover { background: var(--card); }
.mat-src { flex: none; font-weight: 600; color: var(--text); max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mat-prev { flex: 1; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.mat-go { flex: none; color: var(--primary); font-size: 12px; }
.mat-modal-src { font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.mat-modal-text {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px; max-height: 45vh; overflow: auto;
  font-size: 13.5px; line-height: 1.8; white-space: pre-wrap; word-break: break-word;
}

/* ===== 深色模式 ===== */
html[data-theme="dark"] {
  --primary: #3b82f6;
  --primary-light: #1e293b;
  --bg: #0f172a;
  --card: #1e293b;
  --bg-soft: #243244;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #334155;
  --danger: #f87171;
  --warning: #fbbf24;
  --success: #34d399;
  color-scheme: dark;
}
/* 深色下主按钮白字保持 */
html[data-theme="dark"] .btn-primary { color: #fff; }
html[data-theme="dark"] .logo { color: #fff; }
html[data-theme="dark"] .bubble.user { color: #fff; }
html[data-theme="dark"] .mat-chip:hover { color: #fff; }

/* 状态色块暗化 */
html[data-theme="dark"] .mk-hist-row.hist-ok { background: #052e16; }
html[data-theme="dark"] .mk-hist-row.hist-bad { background: #450a0a; }
html[data-theme="dark"] .mistake-batchbar { background: #450a0a; border-color: #7f1d1d; }
html[data-theme="dark"] .mk-result-box.res-ok { background: #052e16; border-color: #14532d; }
html[data-theme="dark"] .mk-result-box.res-bad { background: #450a0a; border-color: #7f1d1d; }
html[data-theme="dark"] .mk-opt.mk-opt-ans { background: #052e16; border-color: #14532d; }
html[data-theme="dark"] .mk-mastery.master-ok { background: #052e16; color: #4ade80; }
html[data-theme="dark"] .mk-mastery.master-warn { background: #422006; color: #fbbf24; }
html[data-theme="dark"] .mk-qtype { background: #1e3a8a; color: #93c5fd; }
html[data-theme="dark"] .voice-course, html[data-theme="dark"] .voice-course-tag { background: #022c22; border-color: #065f46; color: #34d399; }
html[data-theme="dark"] .mk-course, html[data-theme="dark"] .mat-src { color: #e2e8f0; }
html[data-theme="dark"] .q-explain { background: var(--bg-soft); }

/* 提示框/tooltip/弹窗细节 */
html[data-theme="dark"] .toast { background: #1e293b; border: 1px solid var(--border); }
html[data-theme="dark"] .upload-progress { background: var(--card); }
html[data-theme="dark"] .up-row { background: var(--bg-soft); }
html[data-theme="dark"] .up-bar { background: var(--border); }
html[data-theme="dark"] .chat-input input { background: var(--card); color: var(--text); }
html[data-theme="dark"] .content-text { background: var(--bg-soft); color: var(--text); }
html[data-theme="dark"] .mk-answer { background: var(--bg-soft); border-left-color: var(--muted); }
html[data-theme="dark"] .mistake-filter { background: var(--bg-soft); }
html[data-theme="dark"] .mistake-filter input, html[data-theme="dark"] .mistake-filter select { background: var(--card); color: var(--text); }
html[data-theme="dark"] .rec-live { background: var(--bg-soft); }
html[data-theme="dark"] .rec-time { color: var(--primary); }
html[data-theme="dark"] .thread-bar { background: var(--primary-light); border-color: var(--border); }
html[data-theme="dark"] .tip-chip { background: var(--primary-light); color: var(--primary); }
html[data-theme="dark"] .stats-cell { background: var(--bg-soft); }
html[data-theme="dark"] .stats-top-item { background: var(--bg-soft); }
html[data-theme="dark"] .stats-bar { background: var(--border); }
html[data-theme="dark"] .mk-hist-row, html[data-theme="dark"] .mk-opt { background: var(--bg-soft); }
html[data-theme="dark"] .daily-tips-card { background: var(--primary-light); border-color: var(--border); }
html[data-theme="dark"] .modal-mask { background: rgba(2, 6, 23, 0.62); }

/* Markdown / KaTeX / 思维导图适配 */
html[data-theme="dark"] .md-body code { background: #334155; color: #93c5fd; }
html[data-theme="dark"] .md-body pre { background: #0b1220; border-color: var(--border); }
html[data-theme="dark"] .md-body blockquote { border-left-color: var(--primary); background: var(--bg-soft); }
html[data-theme="dark"] .md-body table th { background: var(--bg-soft); }
html[data-theme="dark"] .md-body table td { border-color: var(--border); }
html[data-theme="dark"] .katex { color: var(--text); }
html[data-theme="dark"] .mindmap-svg { background: transparent; }
html[data-theme="dark"] .mindmap-card { background: var(--bg-soft); }
html[data-theme="dark"] .markmap-node text { fill: var(--text); }
html[data-theme="dark"] .mermaid, html[data-theme="dark"] svg text { fill: var(--text); }

/* ===== 材料行内展开全文 ===== */
.mat-full {
  margin: 0 8px 8px; padding: 12px 14px;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  font-size: 13px; line-height: 1.8;
}
.mat-full-text { white-space: pre-wrap; word-break: break-word; color: var(--text); }
.mat-full-actions { display: flex; gap: 8px; margin-top: 10px; justify-content: flex-end; }

/* ===== 文献翻译 v2 ===== */
.trans-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; }
.trans-langs { display: flex; align-items: center; gap: 8px; }
.trans-langs select { border: 1px solid var(--border); border-radius: 8px; padding: 7px 10px; font-size: 13px; background: var(--card); color: var(--text); outline: none; }
.trans-arrow { color: var(--muted); font-weight: 700; }
.trans-tools { display: flex; gap: 8px; }
.trans-progress { font-size: 12px; color: var(--primary); font-weight: 600; margin-left: auto; }
.trans-opts { display: flex; gap: 12px; font-size: 12.5px; color: var(--muted); }
.trans-opt { display: flex; align-items: center; gap: 4px; cursor: pointer; }
.trans-opt input { accent-color: var(--primary); }
.trans-result-actions { display: flex; gap: 8px; margin-top: 10px; justify-content: flex-end; }
.bi-pair { margin-bottom: 12px; border-bottom: 1px dashed var(--border); padding-bottom: 12px; }
.bi-src { color: var(--muted); font-size: 13px; line-height: 1.7; margin-bottom: 6px; }
.bi-dst { color: var(--text); font-size: 14px; line-height: 1.8; }
.bi-dst .md-body { padding: 0; }
.gloss-add { display: flex; gap: 8px; margin-bottom: 12px; }
.gloss-add input { flex: 1; border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px; font-size: 13px; background: var(--card); color: var(--text); outline: none; }
.gloss-add input:focus { border-color: var(--primary); }
.gloss-list { display: flex; flex-direction: column; gap: 6px; max-height: 46vh; overflow-y: auto; }
.gloss-row { display: flex; align-items: center; gap: 10px; background: var(--bg-soft); border-radius: 8px; padding: 8px 12px; font-size: 13px; }
.gloss-term { font-weight: 700; color: var(--text); }
.gloss-arrow { color: var(--muted); }
.gloss-trans { flex: 1; color: var(--primary); }
.trans-hist-row { cursor: pointer; transition: background .12s; }
.trans-hist-row:hover { background: var(--card); border: 1px solid var(--border); }
.trans-divider { width: 1px; height: 16px; background: var(--border); flex: none; }

/* ===== 课件学习总览 ===== */
.badge-count {
  display: inline-block; background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: 999px; padding: 2px 8px; font-size: 11px; color: var(--muted);
  flex: none; white-space: nowrap;
}
.ov-head { margin-bottom: 14px; }
.ov-meta { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.ov-mastery-row { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 6px; }
.ov-mastery-row b { color: var(--primary); }
.ov-section { margin-bottom: 14px; }
.ov-sec-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 700; margin-bottom: 8px;
}
.ov-sec-title button { margin-left: auto; }
.ov-item {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-soft); border-radius: 8px; padding: 8px 12px;
  font-size: 13px; margin-bottom: 5px;
}
.ov-item-text { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); }
.ov-mastery-sm { flex: none; border-radius: 999px; padding: 1px 9px; font-size: 11px; font-weight: 600; }

/* ===== 对话搜索高亮 ===== */
.chat-search-row { cursor: pointer; }
.chat-search-row:hover { background: var(--card); border: 1px solid var(--border); }
.bubble.user.chat-hit { animation: chatHit 0.8s ease 3; }
@keyframes chatHit {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
  50% { box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.45); }
}

/* ==========================================================
   账号体系：登录遮罩 / 用户菜单 / 侧边栏账号 / 邀请码
   全部使用 CSS 变量，深色模式自动适配
   ========================================================== */
.login-gate {
  position: fixed; inset: 0; z-index: 3000;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--bg) 0%, var(--primary-light) 100%);
  padding: 20px; overflow: auto;
}
.login-gate.hidden { display: none; }
.lg-card {
  width: 100%; max-width: 400px; background: var(--card);
  border: 1px solid var(--border); border-radius: 14px;
  padding: 26px 24px 18px; box-shadow: 0 18px 50px rgba(0, 0, 0, .12);
}
.lg-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.lg-brand strong { display: block; font-size: 17px; color: var(--primary); }
.lg-brand small { color: var(--muted); font-size: 12px; }
.lg-tabs {
  display: flex; gap: 4px; background: var(--bg-soft); border-radius: 9px;
  padding: 4px; margin-bottom: 16px;
}
.lg-tabs.hidden { display: none; }
.lg-tabs button {
  flex: 1; padding: 8px; border: none; background: transparent; border-radius: 7px;
  color: var(--muted); font-size: 13px; cursor: pointer; transition: .15s;
}
.lg-tabs button.active { background: var(--card); color: var(--primary); font-weight: 600; box-shadow: 0 1px 3px rgba(0,0,0,.08); }
.lg-pane.hidden { display: none; }
.lg-pane label {
  display: block; margin: 12px 0 6px; font-size: 12px; color: var(--muted);
}
.lg-pane label em { font-style: normal; color: var(--muted); opacity: .8; margin-left: 4px; font-size: 11px; }
.lg-pane input[type="text"], .lg-pane input:not([type]),
.lg-pane input[type="password"], .lg-pane input[inputmode],
.cp-input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-soft); color: var(--text); font-size: 14px; outline: none; transition: .15s;
}
.lg-pane input:focus, .cp-input:focus { border-color: var(--primary); background: var(--card); }
.cp-input { margin-bottom: 8px; }
.lg-row { display: flex; gap: 8px; align-items: center; }
.lg-row.hidden { display: none; }
.lg-pwd-block.hidden { display: none; }
.lg-sms {
  flex: 0 0 auto; padding: 10px 12px; border: 1px solid var(--primary); border-radius: 8px;
  background: transparent; color: var(--primary); font-size: 12px; cursor: pointer; white-space: nowrap;
}
.lg-sms.hidden { display: none; }
.lg-check {
  display: flex !important; align-items: center; gap: 6px; margin: 12px 0 0 !important;
  font-size: 12px; color: var(--muted); cursor: pointer;
}
.lg-check input { width: auto !important; }
.lg-btn {
  width: 100%; margin-top: 18px; padding: 11px; border: none; border-radius: 9px;
  background: var(--primary); color: #fff; font-size: 14px; font-weight: 600; cursor: pointer; transition: .15s;
}
.lg-btn:hover { filter: brightness(1.06); }
.lg-btn:disabled { opacity: .6; cursor: not-allowed; }
.lg-err { min-height: 18px; margin-top: 8px; color: var(--danger); font-size: 12px; text-align: center; }
.lg-switch { margin-top: 12px; text-align: center; }
.lg-switch a { color: var(--primary); font-size: 12px; text-decoration: none; }
.lg-switch a:hover { text-decoration: underline; }
.lg-welcome {
  background: var(--primary-light); border-radius: 9px; padding: 14px;
  font-size: 13px; line-height: 1.7; margin-bottom: 6px;
}
.lg-welcome small { color: var(--muted); }
.lg-foot { margin-top: 16px; text-align: center; font-size: 11px; color: var(--muted); }

/* 顶栏用户菜单 */
.user-menu { position: relative; }
.user {
  display: flex; align-items: center; gap: 8px; padding: 5px 10px 5px 5px;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 999px;
  cursor: pointer; color: var(--text); font-size: 13px;
}
.user:hover { border-color: var(--primary); }
.user .caret { color: var(--muted); font-size: 10px; }
.avatar {
  width: 28px; height: 28px; border-radius: 50%; background: var(--primary);
  color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 600;
}
.avatar.sm { width: 24px; height: 24px; font-size: 12px; }
.user-dropdown {
  position: absolute; right: 0; top: calc(100% + 8px); min-width: 190px; z-index: 60;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .12); padding: 6px; overflow: hidden;
}
.user-dropdown.hidden { display: none; }
.ud-head { padding: 10px 12px; border-bottom: 1px solid var(--border); margin-bottom: 4px; }
.ud-head strong { display: block; font-size: 13px; }
.ud-head small { color: var(--muted); font-size: 11px; }
.user-dropdown button {
  display: block; width: 100%; text-align: left; padding: 9px 12px; border: none;
  background: transparent; color: var(--text); font-size: 13px; border-radius: 7px; cursor: pointer;
}
.user-dropdown button:hover { background: var(--bg-soft); }
.user-dropdown button.danger, .btn-link.danger { color: var(--danger); }
.user-dropdown button.hidden { display: none; }

/* 侧边栏底部账号 */
.sidebar-foot {
  margin-top: auto; display: flex; align-items: center; gap: 9px;
  padding: 10px; border-radius: 9px; cursor: pointer; transition: .15s;
}
.sidebar-foot:hover { background: var(--bg-soft); }
.sf-text strong { display: block; font-size: 13px; }
.sf-text small { color: var(--muted); font-size: 11px; }

/* 设置页：账号区块 */
.badge-role {
  display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 999px;
  background: var(--primary-light); color: var(--primary); font-size: 11px; font-weight: 600;
}
.row-actions { display: flex; gap: 8px; flex-shrink: 0; }
.panel-title { font-size: 14px; margin-bottom: 10px; color: var(--text); }
.invite-list { display: flex; flex-direction: column; gap: 6px; padding: 4px 0; }
.invite-row {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg-soft);
}
.invite-row.used { opacity: .55; }
.invite-row code { font-size: 14px; letter-spacing: 1px; color: var(--primary); font-weight: 600; }
.invite-meta, .invite-state { font-size: 11px; color: var(--muted); }
.invite-state { margin-left: auto; }
.invite-new { padding: 8px 10px; background: var(--primary-light); border-radius: 8px; font-size: 13px; }
.btn-link {
  border: none; background: transparent; color: var(--primary);
  cursor: pointer; font-size: 12px; padding: 2px 4px; text-decoration: underline;
}

/* ===== 课件管理：搜索 / 排序 / 批量 ===== */
.courses-toolbar {
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap;
}
.course-search {
  flex: 1 1 240px; min-width: 180px;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 12px; font-size: 13px; color: var(--text); outline: none;
}
.course-search:focus { border-color: var(--primary); background: var(--card); }
.course-sort-label { font-size: 13px; color: #64748b; }
.course-sort {
  flex: 0 0 auto; background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 8px 12px; font-size: 13px; color: var(--text); cursor: pointer;
}
.batch-bar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--primary-light, #eef4ff); border: 1px solid var(--primary);
  border-radius: 10px; padding: 10px 14px; margin-bottom: 14px;
}
.batch-count { font-size: 13px; font-weight: 600; color: var(--primary); }
.batch-move-select {
  flex: 0 0 auto; background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 7px 10px; font-size: 13px; color: var(--text);
}
.batch-bar .btn-sm { padding: 6px 14px; font-size: 13px; border-radius: 8px; cursor: pointer; }
.courses-no-result {
  padding: 24px; text-align: center; color: #94a3b8; font-size: 13px;
  background: var(--bg-soft); border-radius: 10px; margin-bottom: 14px;
}
.file-check-wrap {
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
  width: 18px; cursor: pointer;
}
.file-check { width: 15px; height: 15px; cursor: pointer; accent-color: var(--primary); }
.file-row { gap: 10px; }

@media (max-width: 640px) {
  .lg-card { padding: 20px 16px 14px; }
  .invite-state { margin-left: 0; }
}

/* ===== 今日复习（错题间隔复习队列） ===== */
.due-badge {
  display: inline-block; min-width: 18px; padding: 0 6px; margin-left: 4px;
  border-radius: 999px; background: #e2e8f0; color: #475569;
  font-size: 12px; font-weight: 700; line-height: 18px; text-align: center;
}
.due-badge.has { background: #ef4444; color: #fff; }
.btn-due-hot { border-color: #ef4444 !important; color: #ef4444 !important; }
.due-review-box .due-progress-text { font-size: 13px; color: var(--muted); margin-left: 8px; font-weight: 400; }
.due-review-box .mk-ans-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.due-review-box .mk-submit { align-self: flex-start; }
.due-graduate {
  margin-top: 10px; padding: 8px 12px; border-radius: 8px;
  background: #f0f9ff; border: 1px solid #bae6fd; color: #0369a1; font-size: 13px;
}
.due-summary { display: flex; flex-direction: column; gap: 8px; }
.due-summary-num { font-size: 30px; font-weight: 800; color: var(--primary); }
.due-summary-title { font-size: 14px; font-weight: 600; }
.due-summary-list { display: flex; flex-direction: column; gap: 6px; max-height: 280px; overflow-y: auto; margin-top: 4px; }
.due-summary-row { display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 8px; font-size: 13px; }
.due-summary-row.sum-ok { background: #f0fdf4; }
.due-summary-row.sum-bad { background: #fef2f2; }
.sum-mark { flex: none; font-weight: 800; }
.sum-q { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sum-m { flex: none; font-size: 12px; color: var(--muted); }
.due-summary-tip { font-size: 12px; margin-top: 4px; }
.due-summary-actions { display: flex; gap: 8px; margin-top: 10px; }
html[data-theme="dark"] .due-summary-row.sum-ok { background: #052e16; }
html[data-theme="dark"] .due-summary-row.sum-bad { background: #450a0a; }
html[data-theme="dark"] .due-graduate { background: #082f49; border-color: #0c4a6e; color: #7dd3fc; }

/* ===== 复习计划 / 每日打卡 ===== */
.plans-toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.plans-title { font-size: 18px; font-weight: 700; flex: 1; }
.plan-section { margin-bottom: 18px; }
.plan-section-title { font-size: 14px; font-weight: 600; color: var(--muted); margin-bottom: 10px; }
.plan-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin-bottom: 12px; transition: box-shadow .15s; }
.plan-card:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.06); }
.plan-card.plan-done { opacity: 0.85; border-color: #bbf7d0; }
.plan-card.plan-arc { opacity: 0.6; }
.plan-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; margin-bottom: 6px; }
.plan-title { font-size: 15.5px; font-weight: 700; }
.plan-meta { font-size: 12px; color: var(--muted); }
.plan-goal { font-size: 13px; color: var(--muted); margin: 4px 0 6px; }
.plan-daily { font-size: 13px; background: var(--bg-soft); padding: 8px 10px; border-radius: 8px; margin: 6px 0; }
.plan-progress { margin: 10px 0; }
.plan-bar { height: 8px; background: var(--bg-soft); border-radius: 999px; overflow: hidden; }
.plan-bar-fill { height: 100%; background: linear-gradient(90deg, #10b981, #06b6d4); transition: width .3s; }
.plan-stat { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.plan-actions { display: flex; gap: 8px; margin-top: 10px; }
.plan-actions .btn-primary,
.plan-actions .btn-secondary { padding: 6px 14px; font-size: 13px; border-radius: 8px; cursor: pointer; }
.plan-actions .btn-primary { background: var(--primary); color: #fff; border: 1px solid var(--primary); }
.plan-actions .btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }
.plan-actions .btn-secondary { background: var(--card); color: var(--text); border: 1px solid var(--border); }
.plan-form { display: flex; flex-direction: column; gap: 12px; }
.plan-form label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; font-weight: 600; }
.plan-form input, .plan-form textarea {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 13.5px;
  font-family: inherit; background: var(--card); color: var(--text);
}
.plan-form input:focus, .plan-form textarea:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.plan-form-row { display: flex; gap: 12px; }
.plan-form-row label { flex: 1; }
.plan-form-err { color: #dc2626; font-size: 12.5px; margin-top: 4px; }
.plan-calendar { display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: 8px; margin-top: 12px; }
.plan-day { background: var(--bg-soft); border-radius: 8px; padding: 8px 6px; text-align: center; font-size: 12px; }
.plan-day-ok { background: #dcfce7; color: #15803d; }
.plan-day-date { font-weight: 600; font-size: 11px; opacity: 0.7; }
.plan-day-mark { font-size: 16px; font-weight: 800; margin: 2px 0; }
.plan-day-note { font-size: 10.5px; opacity: 0.7; max-height: 32px; overflow: hidden; text-overflow: ellipsis; }
html[data-theme="dark"] .plan-day-ok { background: #064e3b; color: #6ee7b7; }
html[data-theme="dark"] .plan-card.plan-done { border-color: #14532d; }