:root{
  --bg:#FFF7ED; --paper:#FFFFFF; --warm:#FFEDD5; --line:#FED7AA;
  --brand:#C2410C; --dark:#9A3412; --ink:#1C1917; --muted:#78716C;
  --soft:#FFFBF6; --shadow:0 2px 10px rgba(120,70,20,.06);
  --shadow-lg:0 12px 36px rgba(120,70,20,.13);
  --font:"PingFang TC","Microsoft JhengHei","Noto Sans CJK TC","Noto Sans TC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,select{font-family:inherit}
button{cursor:pointer}
.hidden{display:none !important}

/* ---------------- layout ---------------- */
.app{display:flex;min-height:100vh}
.sidebar{width:252px;flex:0 0 252px;background:var(--paper);border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;z-index:30}
.brand{display:flex;gap:12px;align-items:center;padding:22px 18px 20px;border-bottom:1px solid var(--line)}
.brand-mark{width:42px;height:42px;flex:0 0 42px;border-radius:11px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:23px;font-weight:700;box-shadow:0 4px 12px rgba(194,65,12,.25)}
.brand-name{font-size:15px;font-weight:700;color:var(--dark);line-height:1.3}
.brand-sub{font-size:11px;color:var(--muted);margin-top:3px}
.nav{padding:14px 10px;flex:1;overflow-y:auto}
.nav-item{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:9px;color:#57534E;font-size:14px;margin-bottom:3px;transition:.15s}
.nav-item:hover{background:var(--soft);color:var(--dark)}
.nav-item.active{background:var(--warm);color:var(--dark);font-weight:700}
.nav-ico{width:20px;text-align:center;font-size:15px;color:var(--brand)}
.nav-badge{margin-left:auto;background:#fff;border:1px solid var(--line);color:var(--brand);font-size:11px;padding:1px 7px;border-radius:20px;font-weight:700}
.side-foot{padding:14px 16px 18px;border-top:1px solid var(--line)}
.side-note{font-size:11px;color:var(--muted);line-height:1.6;margin-bottom:12px}
.switch{display:flex;align-items:center;gap:9px;cursor:pointer;font-size:13px;color:var(--dark);font-weight:600}
.switch input{display:none}
.switch-track{width:36px;height:20px;border-radius:20px;background:#E7E5E4;position:relative;transition:.2s;flex:0 0 36px}
.switch-dot{position:absolute;top:3px;left:3px;width:14px;height:14px;background:#fff;border-radius:50%;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.2)}
.switch input:checked + .switch-track{background:var(--brand)}
.switch input:checked + .switch-track .switch-dot{left:19px}

.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:62px;flex:0 0 62px;background:rgba(255,255,255,.9);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;padding:0 28px;position:sticky;top:0;z-index:20}
.menu-btn{display:none;background:none;border:0;font-size:20px;color:var(--dark)}
.crumb{font-size:14px;color:var(--muted);display:flex;gap:10px;align-items:center;min-width:0}
#crumb-title{font-weight:700;color:var(--dark);white-space:nowrap}
.crumb-sep{color:var(--line)}
#crumb-sub{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top-actions{margin-left:auto;display:flex;gap:10px;align-items:center}
.chip{font-size:11px;padding:4px 10px;border-radius:20px;font-weight:600;white-space:nowrap}
.chip-soft{background:var(--warm);color:var(--dark)}
.views{padding:30px 32px 96px;max-width:1420px;width:100%;margin:0 auto}
.view{display:none;animation:fade .25s ease}
.view.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------------- common ---------------- */
.sec-title{font-size:21px;color:var(--dark);margin:30px 0 14px;font-weight:700}
.sec-title.no-margin{margin:0}
.sub-title{font-size:15px;color:var(--dark);margin:26px 0 12px;font-weight:700}
.sec-desc{font-size:13px;color:var(--muted);margin:5px 0 0}
.view-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.head-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border-radius:9px;padding:9px 16px;font-size:14px;font-weight:600;border:1px solid transparent;transition:.15s;white-space:nowrap}
.btn-sm{padding:7px 13px;font-size:12.5px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 3px 10px rgba(194,65,12,.2)}
.btn-primary:hover{background:#9A3412}
.btn-outline{background:#fff;border-color:var(--line);color:var(--dark)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost{background:transparent;color:var(--muted)}
.btn-ghost:hover{background:var(--warm);color:var(--dark)}
.btn-dark{background:var(--dark);color:#fff}
.btn-light{background:#fff;color:var(--dark);border-color:rgba(255,255,255,.4)}
.btn-link{background:none;color:var(--brand);padding-left:0}
.btn-icon{width:36px;height:36px;padding:0;border-radius:8px;background:#fff;border:1px solid var(--line);color:var(--dark);font-size:17px}
.btn-icon:hover{border-color:var(--brand)}
.btn-quote{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.35);margin-top:16px}
.check{display:flex;align-items:center;gap:7px;font-size:13px;color:var(--muted);cursor:pointer}
.check input{accent-color:var(--brand);width:15px;height:15px}
.empty{text-align:center;color:var(--muted);padding:36px;font-size:14px}

/* ---------------- home ---------------- */
.hero{background:linear-gradient(120deg,#FFF7ED 0%,#FFEDD5 100%);border:1px solid var(--line);border-radius:18px;padding:38px 40px;display:grid;grid-template-columns:1.4fr .8fr;gap:34px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;background:rgba(194,65,12,.05)}
.kicker{display:inline-block;font-size:12px;font-weight:700;color:var(--brand);letter-spacing:.08em;margin-bottom:14px}
.hero h1{font-size:44px;line-height:1.2;margin:0;color:var(--dark);font-weight:800;letter-spacing:.02em}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-tag{font-size:17px;font-weight:700;color:var(--dark);margin:16px 0 12px}
.hero-desc{font-size:14px;color:#57534E;max-width:620px;margin:0}
.hero-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.hero-side{display:flex;align-items:center;justify-content:center}
.hero-quote{background:var(--dark);color:#fff;border-radius:16px;padding:28px;width:100%;max-width:310px;box-shadow:var(--shadow-lg);position:relative;z-index:1}
.quote-mark{font-size:46px;line-height:.6;color:#FDBA74;font-weight:700}
.quote-text{font-size:24px;font-weight:800;margin:14px 0 12px}
.quote-mean{font-size:13px;color:#FED7AA;line-height:1.8}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:20px}
.stat{background:#fff;border:1px solid var(--line);border-radius:13px;padding:18px 20px;box-shadow:var(--shadow)}
.stat-num{font-size:28px;font-weight:800;color:var(--brand);line-height:1.2}
.stat-label{font-size:12.5px;color:var(--muted);margin-top:4px}
.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.module{background:#fff;border:1px solid var(--line);border-radius:13px;padding:18px;transition:.18s;box-shadow:var(--shadow);display:block}
.module:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:#FB923C}
.module-no{font-size:12px;font-weight:800;color:var(--brand);letter-spacing:.06em}
.module-name{font-size:15px;font-weight:700;color:var(--dark);margin:7px 0 5px}
.module-desc{font-size:12.5px;color:var(--muted);line-height:1.6}
.module-arrow{font-size:12px;color:var(--brand);margin-top:10px;display:block}
.callout{background:#fff;border:1px solid var(--line);border-left:5px solid var(--brand);border-radius:13px;padding:22px 24px;margin-top:26px;display:flex;gap:18px;box-shadow:var(--shadow)}
.callout-ico{font-size:26px;color:var(--brand);flex:0 0 auto}
.callout h3{margin:0 0 7px;font-size:16px;color:var(--dark)}
.callout p{font-size:13.5px;color:#57534E;margin:0}
.callout-actions{display:flex;gap:14px;align-items:center;margin-top:14px;flex-wrap:wrap}

/* ---------------- slides ---------------- */
.slide-toolbar{display:flex;align-items:center;gap:14px;margin-bottom:12px}
.slide-progress{flex:1;height:5px;background:var(--warm);border-radius:5px;overflow:hidden}
.slide-progress-bar{height:100%;width:8.33%;background:var(--brand);transition:width .25s}
.slide-count{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;min-width:56px;text-align:center}
.slide-stage{position:relative;width:100%;background:#F5EFE6;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.slide-scaler{position:absolute;top:0;left:0;width:1280px;height:720px;transform-origin:top left}
.slide-canvas,.slide-canvas *{font-family:"PingFang TC","Microsoft JhengHei","Noto Sans CJK TC","Noto Sans TC","Microsoft YaHei",sans-serif !important}
.slide-stage:fullscreen{background:#1C1917;border-radius:0;display:flex;align-items:center;justify-content:center}
.slide-stage:fullscreen .slide-scaler{position:relative}
.slide-chapter{font-size:14px;font-weight:700;color:var(--dark);margin:14px 0 8px}
.notes-panel{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:10px;padding:14px 18px;margin-bottom:14px}
.notes-label{font-size:11px;font-weight:800;color:var(--brand);letter-spacing:.08em;margin-bottom:5px}
.notes-text{font-size:13.5px;color:#57534E}
.slide-strip{display:flex;gap:7px;overflow-x:auto;padding:6px 0 4px;margin-top:8px}
.strip-item{flex:0 0 auto;width:34px;height:26px;border-radius:6px;border:1px solid var(--line);background:#fff;color:var(--muted);font-size:11px;font-weight:700}
.strip-item.active{background:var(--brand);color:#fff;border-color:var(--brand)}

/* ---------------- phrases ---------------- */
.tool-row{display:flex;gap:10px;margin-bottom:14px}
.search{flex:1;border:1px solid var(--line);background:#fff;border-radius:9px;padding:10px 14px;font-size:14px;outline:none;color:var(--ink)}
.search:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(194,65,12,.1)}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.tab{background:#fff;border:1px solid var(--line);border-radius:20px;padding:6px 14px;font-size:13px;color:var(--muted)}
.tab.active{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:700}
.phrase-group{margin-bottom:26px}
.phrase-group-head{font-size:16px;font-weight:700;color:var(--dark);margin:0 0 12px;display:flex;align-items:center;gap:9px}
.phrase-group-head:before{content:"";width:5px;height:18px;border-radius:3px;background:var(--brand)}
.phrase-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:11px}
.phrase-card{background:#fff;border:1px solid var(--line);border-radius:11px;padding:14px 16px;display:flex;gap:12px;align-items:flex-start;box-shadow:var(--shadow)}
.phrase-num{font-size:11px;font-weight:800;color:var(--brand);padding-top:3px;min-width:22px}
.phrase-text{flex:1;font-size:14.5px;line-height:1.7}
.copy-btn{border:1px solid var(--line);background:var(--soft);color:var(--brand);border-radius:7px;font-size:11.5px;padding:4px 9px;font-weight:700;white-space:nowrap}
.copy-btn:hover{background:var(--warm)}
.copy-btn.done{background:#DCFCE7;color:#166534;border-color:#BBF7D0}

/* ---------------- listening ---------------- */
.reel-banner{background:var(--dark);color:#fff;border-radius:12px;padding:16px 20px;display:flex;align-items:center;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.reel-ico{font-size:26px;color:#FDBA74}
.reel-text{flex:1;min-width:220px;display:flex;flex-direction:column}
.reel-text strong{font-size:15px}
.reel-text span{font-size:12.5px;color:#FED7AA;margin-top:2px}
.q-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin-bottom:13px;box-shadow:var(--shadow)}
.q-head{display:flex;align-items:center;gap:12px;margin-bottom:10px;flex-wrap:wrap}
.q-id{background:var(--brand);color:#fff;border-radius:6px;padding:3px 9px;font-size:12px;font-weight:800}
.q-line{font-size:17px;font-weight:700;color:var(--ink)}
.q-line.masked{filter:blur(6px);user-select:none;cursor:pointer}
.q-line.masked:hover{filter:blur(3px)}
.q-play{border:1px solid var(--line);background:var(--warm);color:var(--dark);border-radius:7px;padding:4px 11px;font-size:12px;font-weight:700}
.q-play:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.q-opts{display:grid;gap:7px;margin-top:12px}
.q-opt{display:flex;gap:10px;align-items:flex-start;border:1px solid var(--line);border-radius:9px;padding:9px 12px;cursor:pointer;font-size:13.5px;transition:.12s;background:var(--soft)}
.q-opt:hover{border-color:#FB923C}
.q-opt input{accent-color:var(--brand);margin-top:4px}
.q-opt.sel{background:var(--warm);border-color:var(--brand)}
.q-opt.right{background:#F0FDF4;border-color:#86EFAC}
.q-opt.wrong{background:#FEF2F2;border-color:#FCA5A5}
.q-key{font-weight:800;color:var(--brand);min-width:18px}
.q-explain{display:none;margin-top:12px;background:var(--soft);border-left:3px solid var(--brand);border-radius:0 8px 8px 0;padding:10px 13px;font-size:13px;color:#57534E}
.q-explain.show{display:block}
.q-result{font-size:12px;font-weight:800;margin-left:auto}
.q-result.ok{color:#15803D}
.q-result.no{color:#B91C1C}
.open-card{background:var(--warm);border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin-top:20px}
.open-head{font-size:14px;font-weight:800;color:var(--dark);margin-bottom:8px}
.open-q{font-size:15px;margin:0 0 12px}
.open-answer{margin-top:10px;background:#fff;border-radius:8px;padding:11px 14px;font-size:13.5px}
.submit-bar{display:flex;align-items:center;gap:12px;margin-top:22px;flex-wrap:wrap}
.score-box{background:var(--dark);color:#fff;border-radius:10px;padding:11px 18px;font-size:15px;font-weight:700}
.tutor-only{display:none}
body.tutor .tutor-only{display:inline-flex}

/* ---------------- vocab ---------------- */
.audio-trio{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}
.audio-tile{background:#fff;border:1px solid var(--line);border-radius:12px;padding:17px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:9px}
.audio-tile .t{font-size:14.5px;font-weight:700;color:var(--dark)}
.audio-tile .d{font-size:12.5px;color:var(--muted);flex:1}
.table-wrap{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:18px;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th{background:var(--warm);color:var(--dark);font-weight:800;text-align:left;padding:11px 15px;font-size:13px}
td{padding:10px 15px;border-top:1px solid #F5EFE6}
tr:hover td{background:var(--soft)}
td.v-word{font-weight:800;color:var(--dark);white-space:nowrap}
td.v-jp{color:var(--muted);font-size:12.5px;white-space:nowrap}
td.v-hx{color:var(--muted);font-size:12.5px;white-space:nowrap}
.danger-note{background:#fff;border:1px solid #FCA5A5;border-left:4px solid #DC2626;border-radius:10px;padding:13px 17px;margin-top:16px;font-size:13.5px;color:#57534E}
.danger-note strong,.danger-note b{color:#B91C1C}
.fallback-card{background:var(--dark);color:#fff;border-radius:14px;padding:24px 26px;margin-top:20px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.fallback-card>div{flex:1;min-width:260px}
.fallback-label{font-size:12px;color:#FDBA74;font-weight:800;margin-bottom:9px}
.fallback-text{font-size:20px;font-weight:800;line-height:1.6}
.fallback-hint{font-size:12.5px;color:#FED7AA;margin-top:10px;line-height:1.7}

/* ---------------- script ---------------- */
.time-table td:first-child{font-weight:700;color:var(--brand);white-space:nowrap}
.time-table td:last-child{color:var(--muted);white-space:nowrap}
.script-list{margin-top:20px}
.script-sec{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow)}
.script-head{padding:14px 18px;font-size:14.5px;font-weight:700;color:var(--dark);background:var(--soft);cursor:pointer;display:flex;justify-content:space-between;gap:10px;align-items:center}
.script-head .caret{color:var(--brand);font-size:13px}
.script-body{padding:6px 20px 16px;display:none}
.script-sec.open .script-body{display:block}
.script-sec:first-child .script-body{display:block}
.s-line{padding:7px 0;font-size:14px;line-height:1.85}
.s-line.say{color:var(--ink)}
.s-line.sub{color:var(--brand);font-weight:800;margin-top:10px}
.s-line.hint{color:var(--muted);font-style:italic;font-size:13px}
.s-line.list{padding-left:16px;position:relative}
.s-line.list:before{content:"·";position:absolute;left:2px;color:var(--brand);font-weight:800}
.s-line.quote{background:var(--warm);border-radius:8px;padding:11px 14px;color:var(--dark);font-weight:700;margin:8px 0}
.s-line.qa{font-size:13px;color:#57534E;padding:3px 0 3px 12px}

/* ---------------- downloads ---------------- */
.file-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.file-card{background:#fff;border:1px solid var(--line);border-radius:11px;padding:15px 17px;display:flex;gap:13px;align-items:center;box-shadow:var(--shadow)}
.file-ico{width:38px;height:38px;flex:0 0 38px;border-radius:9px;background:var(--warm);color:var(--brand);display:grid;place-items:center;font-size:13px;font-weight:800}
.file-meta{flex:1;min-width:0}
.file-name{font-size:13.5px;font-weight:700;color:var(--dark);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-desc{font-size:12px;color:var(--muted);margin-top:2px}
.file-size{font-size:11px;color:var(--muted);white-space:nowrap}
.audio-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}
.audio-row{background:#fff;border:1px solid var(--line);border-radius:9px;padding:9px 12px;display:flex;align-items:center;gap:11px}
.audio-row .n{font-size:12.5px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.audio-row .sz{font-size:11px;color:var(--muted)}

/* ---------------- player / toast ---------------- */
.player{position:fixed;left:50%;bottom:20px;transform:translateX(-50%);width:min(720px,calc(100vw - 32px));background:#1C1917;color:#fff;border-radius:14px;padding:12px 14px;display:flex;align-items:center;gap:13px;z-index:60;box-shadow:0 14px 40px rgba(0,0,0,.32)}
.player-play{width:38px;height:38px;flex:0 0 38px;border-radius:50%;border:0;background:var(--brand);color:#fff;font-size:15px}
.player-info{flex:1;min-width:0}
.player-title{font-size:12.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:5px}
.player-track input{width:100%;height:4px;accent-color:#FB923C;cursor:pointer}
.player-time{font-size:11px;color:#D6D3D1;font-variant-numeric:tabular-nums;white-space:nowrap}
.player-rate{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.2);border-radius:6px;padding:4px 5px;font-size:11px}
.player-close{background:none;border:0;color:#A8A29E;font-size:15px;padding:4px}
.toast{position:fixed;bottom:92px;left:50%;transform:translateX(-50%) translateY(12px);background:var(--dark);color:#fff;padding:9px 18px;border-radius:20px;font-size:13px;opacity:0;pointer-events:none;transition:.25s;z-index:70}
.toast.show{opacity:1;transform:translateX(-50%)}

/* ---------------- responsive ---------------- */
@media(max-width:1100px){
  .hero{grid-template-columns:1fr}.hero-side{justify-content:flex-start}
  .hero-quote{max-width:none}
  .module-grid{grid-template-columns:repeat(2,1fr)}
  .phrase-grid,.file-grid,.audio-grid{grid-template-columns:1fr}
  .audio-trio{grid-template-columns:1fr}
}
@media(max-width:820px){
  .sidebar{position:fixed;left:0;top:0;transform:translateX(-100%);transition:.22s;box-shadow:var(--shadow-lg)}
  body.nav-open .sidebar{transform:none}
  .menu-btn{display:block}
  .topbar{padding:0 16px}
  .views{padding:20px 16px 100px}
  .stat-row{grid-template-columns:repeat(2,1fr)}
  .hero{padding:26px 22px}
  .hero h1{font-size:34px}
  #crumb-sub{display:none}
  .module-grid{grid-template-columns:1fr}
  .player{gap:9px}.player-rate{display:none}
}
@media print{
  .sidebar,.topbar,.player,.slide-strip,.reel-banner,.head-actions,.submit-bar{display:none !important}
  .view{display:none !important}
  #view-script{display:block !important}
  .script-body{display:block !important}
  .script-sec{break-inside:avoid;box-shadow:none}
  body{background:#fff}
}