*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#131711; --surface:#1B211A; --surface2:#232B21; --line:#2C3529;
  --ink:#F1F4EC; --muted:#9BA394; --dim:#39422F;
  --p1:#84A98C; --p2:#A3B18A; --acc:#C9DCB2; --chip:#232B21;
  --danger:#E1678E; --shadow:0 14px 40px rgba(0,0,0,.45);
  --grad:linear-gradient(135deg,var(--p1),var(--p2));
}
body.light{
  --bg:#F3F5F0; --surface:#FFFFFF; --surface2:#F6F8F2; --line:#E6E9DF;
  --ink:#1D211A; --muted:#7B8072; --dim:#DFE4D6; --chip:#EFF2E8;
  --acc:#52796F; --shadow:0 14px 40px rgba(60,70,55,.12);
}
body{font-family:'Rubik',system-ui,sans-serif;direction:rtl;background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;min-height:100vh;transition:background .25s,color .25s}
a{color:var(--acc);text-decoration:none}
img{display:block;max-width:100%}
button{font-family:inherit;cursor:pointer}
.app{display:flex;min-height:100vh}

/* ===== sidebar ===== */
.sidebar{width:230px;background:var(--surface);padding:26px 18px;display:flex;flex-direction:column;flex-shrink:0;border-left:1px solid var(--line);position:sticky;top:0;height:100vh}
.logo{display:flex;align-items:center;gap:10px;margin-bottom:26px}
.logo-mark{width:40px;height:40px;border-radius:12px;background:var(--grad);display:flex;align-items:center;justify-content:center;overflow:hidden;flex-shrink:0}
.logo-mark img{width:100%;height:100%;object-fit:cover}
.logo b{font-size:19px;font-weight:700}
.search{display:flex;align-items:center;gap:8px;background:var(--surface2);border:1px solid var(--line);border-radius:12px;padding:9px 12px;margin-bottom:22px;color:var(--muted)}
.search input{background:none;border:none;outline:none;color:var(--ink);font-family:inherit;font-size:13.5px;width:100%}
.search input::placeholder{color:var(--muted)}
.nav-label{font-size:11.5px;color:var(--muted);margin:0 6px 8px;letter-spacing:.4px}
.nav-item{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:12px;color:var(--muted);font-size:14.5px;font-weight:500;margin-bottom:2px;transition:.15s}
.nav-item svg{width:19px;height:19px;flex-shrink:0}
.nav-item:hover{background:var(--surface2);color:var(--ink)}
.nav-item.on{background:var(--surface2);color:var(--acc)}
.nav-item.on svg{stroke:var(--p1)}
.sidebar-foot{margin-top:auto;display:flex;flex-direction:column;gap:10px}
.user-chip{display:flex;align-items:center;gap:10px;background:var(--surface2);border:1px solid var(--line);border-radius:14px;padding:9px 11px}
.user-chip img,.avatar{width:34px;height:34px;border-radius:50%;object-fit:cover;background:var(--dim)}
.user-chip .nm{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:120px}
.theme-toggle{display:flex;align-items:center;justify-content:center;gap:8px;background:var(--surface2);border:1px solid var(--line);border-radius:12px;padding:9px;color:var(--muted);font-size:13px;width:100%}
.theme-toggle:hover{color:var(--ink)}
.theme-toggle svg{width:16px;height:16px}

/* ===== main ===== */
.main{flex:1;padding:26px 30px 90px;max-width:1160px;min-width:0}
.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;gap:14px}
.topbar h1{font-size:23px;font-weight:700}
.topbar .sub{color:var(--muted);font-size:13.5px;margin-top:3px}

/* hero */
.hero{position:relative;border-radius:22px;overflow:hidden;margin-bottom:22px;min-height:170px;display:flex;align-items:flex-end;color:#fff}
.hero .hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:saturate(.92) brightness(.88)}
.hero .hero-ov{position:absolute;inset:0;background:linear-gradient(to top,rgba(10,14,10,.93) 4%,rgba(10,14,10,.55) 48%,rgba(10,14,10,.32))}
.hero .hero-in{position:relative;padding:24px 26px;width:100%}
.hero h2{font-size:26px;margin-bottom:6px;text-shadow:0 2px 14px rgba(0,0,0,.5)}
.hero p{color:rgba(255,255,255,.85);font-size:14px;max-width:520px;text-shadow:0 1px 8px rgba(0,0,0,.5)}
.hero .hero-cta{margin-top:14px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--grad);color:#10140F;border:none;border-radius:12px;padding:10px 18px;font-size:14px;font-weight:700;transition:.15s}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:var(--surface2);color:var(--ink);border:1px solid var(--line);font-weight:500}
.btn.ghost:hover{border-color:var(--p1)}
.btn.red{background:var(--danger);color:#fff}
.btn.sm{padding:7px 13px;font-size:13px;border-radius:10px}
.btn svg{width:15px;height:15px}

/* stats row */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:22px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:16px 18px;display:flex;align-items:center;gap:14px}
.stat .ic{width:42px;height:42px;border-radius:13px;background:var(--surface2);display:flex;align-items:center;justify-content:center;font-size:19px;flex-shrink:0}
.stat .v{font-size:19px;font-weight:700}
.stat .k{font-size:12.5px;color:var(--muted)}
.streak-flame{color:var(--p1)}

/* weekly chart */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:20px 22px;margin-bottom:22px}
.panel h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;justify-content:space-between}
.panel h3 .hint{font-size:12px;color:var(--muted);font-weight:400}
.week-chart{display:flex;align-items:flex-end;gap:12px;height:110px;padding-top:6px}
.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;gap:7px;height:100%;justify-content:flex-end}
.bar{width:70%;max-width:34px;border-radius:7px 7px 3px 3px;background:var(--dim);min-height:5px;transition:height .3s}
.bar.full{background:var(--grad)}
.bar.today{outline:2px solid var(--acc);outline-offset:2px}
.bar-day{font-size:11px;color:var(--muted)}

/* section head + grids */
.sec-head{display:flex;align-items:center;justify-content:space-between;margin:24px 0 14px}
.sec-head h3{font-size:17px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:16px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:.18s;color:var(--ink);display:block}
.card:hover{transform:translateY(-3px);border-color:var(--p1);box-shadow:var(--shadow)}
.card .thumb{aspect-ratio:16/9.4;background-size:cover;background-position:center;position:relative}
.card .thumb .thumb-badge{position:absolute;top:10px;right:10px;background:rgba(15,20,15,.75);backdrop-filter:blur(4px);color:#fff;font-size:11.5px;padding:4px 10px;border-radius:20px}
.card .cb{padding:13px 15px 15px}
.card .cb b{font-size:14.5px;display:block;margin-bottom:5px;line-height:1.35}
.card .cb .meta{font-size:12px;color:var(--muted);display:flex;justify-content:space-between;align-items:center}
.pbar{height:5px;border-radius:4px;background:var(--dim);margin-top:10px;overflow:hidden}
.pbar i{display:block;height:100%;background:var(--grad);border-radius:4px}

/* continue watching */
.cw-card{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:12px 14px;color:var(--ink)}
.cw-card .thumb{width:104px;height:64px;border-radius:11px;background-size:cover;background-position:center;flex-shrink:0;position:relative}
.cw-card .thumb .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.cw-card .thumb .play span{width:28px;height:28px;border-radius:50%;background:rgba(132,169,140,.95);display:flex;align-items:center;justify-content:center}
.cw-card .thumb .play svg{width:12px;height:12px}
.cw-card b{font-size:13.5px;display:block;margin-bottom:4px;line-height:1.35}
.cw-card .meta{font-size:11.5px;color:var(--muted)}
.cw-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:13px}

/* ===== course page ===== */
.course-head{background:var(--surface);border:1px solid var(--line);border-radius:20px;overflow:hidden;margin-bottom:20px}
.course-head .ch-banner{height:130px;background-size:cover;background-position:center;position:relative}
.course-head .ch-banner::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,var(--surface) 4%,transparent 75%)}
.course-head .ch-in{padding:0 24px 20px;margin-top:-32px;position:relative}
.course-head h2{font-size:22px;margin-bottom:6px}
.course-head .meta{color:var(--muted);font-size:13px;display:flex;gap:16px;flex-wrap:wrap}
.course-head .ch-row{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:14px;flex-wrap:wrap}
.course-head .pbar{flex:1;min-width:200px;margin-top:0;height:8px}
.chapter{background:var(--surface);border:1px solid var(--line);border-radius:18px;margin-bottom:13px;overflow:hidden}
.chapter>summary{list-style:none;cursor:pointer;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.chapter>summary::-webkit-details-marker{display:none}
.chapter>summary:hover{background:var(--surface2)}
.chapter>summary .t{font-size:15px;font-weight:600}
.chapter>summary .m{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:10px}
.chapter>summary .chev{transition:.2s;color:var(--muted);width:18px;height:18px}
.chapter[open]>summary .chev{transform:rotate(180deg)}
.lesson-row{display:flex;align-items:center;gap:13px;padding:11px 20px;border-top:1px solid var(--line);color:var(--ink);transition:.13s}
.lesson-row:hover{background:var(--surface2)}
.lesson-row .num{width:26px;height:26px;border-radius:9px;background:var(--chip);color:var(--muted);font-size:11.5px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.lesson-row .t{flex:1;font-size:13.5px;line-height:1.4;min-width:0}
.lesson-row .dur{font-size:11.5px;color:var(--muted);flex-shrink:0}
.lesson-row .v-mark{width:22px;height:22px;border-radius:50%;border:2px solid var(--dim);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:transparent}
.lesson-row.done .v-mark{background:var(--p1);border-color:var(--p1);color:#10140F}
.lesson-row .kind{font-size:11px;color:var(--muted);background:var(--chip);padding:2px 8px;border-radius:8px;flex-shrink:0}

/* ===== lesson page ===== */
.lesson-grid{display:grid;grid-template-columns:1fr 330px;gap:20px;align-items:start}
.lesson-grid>div{min-width:0}
.player-wrap{background:var(--surface);border:1px solid var(--line);border-radius:20px;overflow:hidden;margin-bottom:16px}
.player-screen{position:relative;aspect-ratio:16/9;background:#0B0E0A url('covers/lesson-player.jpg') center/cover}
.player-screen iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
#playerScreen{position:absolute;inset:0}
.modal-ov{position:fixed;inset:0;background:rgba(10,14,10,.55);display:none;align-items:center;justify-content:center;z-index:300;padding:20px}
.modal-ov.open{display:flex}
.modal-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:22px;max-width:340px;width:100%;text-align:center;box-shadow:0 18px 50px rgba(0,0,0,.35)}
.modal-t{font-weight:800;font-size:15px;margin-bottom:6px}
.modal-b{color:var(--muted);font-size:13px;margin-bottom:16px;line-height:1.5}
.modal-actions{display:flex;gap:10px;justify-content:center}
.player-screen .no-embed{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:rgba(10,14,10,.55);backdrop-filter:blur(2px);color:#fff;text-align:center;padding:20px}
.player-bar{display:flex;align-items:center;gap:14px;padding:12px 16px;flex-wrap:wrap}
.player-bar select{background:var(--surface2);color:var(--ink);border:1px solid var(--line);border-radius:10px;padding:7px 10px;font-family:inherit;font-size:12.5px}
.player-bar .spacer{flex:1}
.yt-open{display:inline-flex;align-items:center;gap:7px;background:#E62117;color:#fff;border-radius:10px;padding:8px 14px;font-size:12.5px;font-weight:700}
.yt-open svg{width:15px;height:15px}
.lesson-title-row{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:14px}
.lesson-title-row h2{font-size:19px;line-height:1.4}
.lesson-title-row .bc{font-size:12.5px;color:var(--muted);margin-bottom:5px}
.complete-btn{display:inline-flex;align-items:center;gap:8px;border-radius:12px;padding:10px 16px;font-size:13.5px;font-weight:700;border:2px solid var(--p1);background:transparent;color:var(--acc);transition:.15s;white-space:nowrap}
.complete-btn.on{background:var(--grad);color:#10140F;border-color:transparent}
.attach-card{background:var(--surface2);border:1px solid var(--line);border-radius:14px;padding:12px 14px;display:flex;align-items:center;gap:12px;margin-bottom:10px}
.attach-card .ai{width:38px;height:38px;border-radius:11px;background:var(--surface);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.attach-card .t{flex:1;font-size:13px;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pdf-preview{margin:10px 0 16px;border-radius:16px;overflow:hidden;border:1px solid var(--line)}
.pdf-preview iframe{width:100%;height:70vh;border:0;background:#fff}
.notes-area textarea{width:100%;min-height:110px;background:var(--surface2);border:1px solid var(--line);border-radius:14px;padding:13px 15px;color:var(--ink);font-family:inherit;font-size:13.5px;resize:vertical;outline:none}
.notes-area textarea:focus{border-color:var(--p1)}
.notes-area .saved{font-size:11.5px;color:var(--muted);margin-top:6px;text-align:left}
.check-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:16px 18px;position:sticky;top:20px}
.check-card h4{font-size:14.5px;margin-bottom:10px}
.check-list{max-height:52vh;overflow-y:auto;margin:0 -6px;padding:0 6px}
.check-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:11px;font-size:12.5px;color:var(--ink);cursor:pointer}
.check-item:hover{background:var(--surface2)}
.check-item.cur{background:var(--chip);color:var(--acc);font-weight:600}
.check-item .cm{width:19px;height:19px;border-radius:50%;border:2px solid var(--dim);flex-shrink:0;display:flex;align-items:center;justify-content:center;color:transparent;font-size:10px}
.check-item.done .cm{background:var(--p1);border-color:var(--p1);color:#10140F}

/* ===== tuner ===== */
.tuner-wrap{max-width:640px;margin:0 auto}
.string-row{display:flex;gap:10px;justify-content:center;margin:18px 0;flex-wrap:wrap}
.sbtn{width:56px;height:56px;border-radius:16px;background:var(--surface);border:1px solid var(--line);color:var(--muted);font-size:16px;font-weight:700;transition:.15s;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px}
.sbtn small{font-size:9.5px;font-weight:400}
.sbtn.on{border-color:var(--p1);color:var(--acc);background:var(--chip);box-shadow:0 0 0 1px var(--p1)}
.dial-card{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:22px;text-align:center;margin-bottom:16px}
.dial-card .note-big{font-size:44px;font-weight:700;margin:8px 0 2px}
.dial-card .freq{color:var(--muted);font-size:13px}
.dial-card.in-tune .note-big{color:var(--p1)}
.seg{display:flex;background:var(--surface2);border:1px solid var(--line);border-radius:12px;padding:4px;gap:4px;width:max-content;margin:0 auto 14px}
.seg button{border:none;background:transparent;color:var(--muted);padding:7px 18px;border-radius:9px;font-size:13px;font-weight:600}
.seg button.on{background:var(--surface);color:var(--acc);box-shadow:0 1px 6px rgba(0,0,0,.25)}
.ref-row{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:14px;flex-wrap:wrap}
.ref-row label{font-size:12.5px;color:var(--muted)}
.ref-row input[type=range]{accent-color:var(--p1)}

/* ===== personal =====
*/
.pgrid{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
.profile-hero{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:22px;display:flex;align-items:center;gap:16px;margin-bottom:16px;grid-column:1/-1}
.avatar-big{width:76px;height:76px;border-radius:50%;object-fit:cover;background:var(--dim)}
.profile-hero .pn{font-size:19px;font-weight:700}
.profile-hero .pe{font-size:13px;color:var(--muted)}
.profile-hero .pstats{margin-right:auto;display:flex;gap:18px;text-align:center}
.profile-hero .pstats .v{font-size:17px;font-weight:700}
.profile-hero .pstats .k{font-size:11px;color:var(--muted)}
.set-row{display:flex;align-items:center;justify-content:space-between;padding:13px 0;border-bottom:1px solid var(--line);gap:12px}
.set-row:last-child{border-bottom:none}
.set-row .sl{font-size:14px}
.set-row .sd{font-size:12px;color:var(--muted);margin-top:2px}
.switch{position:relative;width:44px;height:24px;background:var(--dim);border-radius:20px;border:none;transition:.2s;flex-shrink:0}
.switch::after{content:'';position:absolute;top:3px;right:3px;width:18px;height:18px;border-radius:50%;background:#fff;transition:.2s}
.switch.on{background:var(--p1)}
.switch.on::after{transform:translateX(-20px)}
.goal-picker{display:flex;gap:7px}
.goal-picker button{width:32px;height:32px;border-radius:10px;background:var(--surface2);border:1px solid var(--line);color:var(--muted);font-weight:700;font-size:13px}
.goal-picker button.on{background:var(--grad);color:#10140F;border-color:transparent}
.speed-seg{display:flex;gap:6px;flex-wrap:wrap}
.speed-seg button{padding:7px 13px;border-radius:10px;background:var(--surface2);border:1px solid var(--line);color:var(--muted);font-size:12.5px;font-weight:600}
.speed-seg button.on{background:var(--grad);color:#10140F;border-color:transparent}

/* modal */
.modal-bg{position:fixed;inset:0;background:rgba(8,10,8,.6);backdrop-filter:blur(3px);display:none;align-items:center;justify-content:center;z-index:200}
.modal-bg.open{display:flex}
.modal{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:24px;max-width:400px;width:90%;box-shadow:var(--shadow)}
.modal h3{font-size:17px;margin-bottom:10px}
.modal p{font-size:13.5px;color:var(--muted);line-height:1.6;margin-bottom:18px}
.modal .mrow{display:flex;gap:10px;justify-content:flex-end}

/* ===== metronome ===== */
.met-bubble{position:fixed;bottom:22px;left:22px;width:56px;height:56px;border-radius:50%;background:var(--grad);border:none;box-shadow:0 8px 26px rgba(0,0,0,.4);z-index:150;display:flex;align-items:center;justify-content:center;cursor:grab;color:#10140F}
.met-bubble:active{cursor:grabbing}
.met-bubble svg{width:24px;height:24px}
.met-bubble.beat{animation:metpulse .18s ease}
@keyframes metpulse{40%{transform:scale(1.14)}}
.met-panel{position:fixed;bottom:22px;left:22px;width:238px;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:var(--shadow);z-index:151;display:none}
.met-panel.open{display:block}
.met-head{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.met-head b{font-size:14px;flex:1}
.met-head .x{background:none;border:none;color:var(--muted);font-size:16px}
.met-bpm-row{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:10px}
.met-bpm-row button{width:32px;height:32px;border-radius:10px;background:var(--surface2);border:1px solid var(--line);color:var(--ink);font-size:16px}
.met-bpm{font-size:30px;font-weight:700;min-width:74px;text-align:center}
.met-bpm small{font-size:11px;color:var(--muted);display:block;font-weight:400}
.met-panel input[type=range]{width:100%;accent-color:var(--p1);margin-bottom:12px}
.met-row{display:flex;gap:8px}
.met-row .btn{flex:1;justify-content:center}
.met-tap{background:var(--surface2);border:1px solid var(--line);color:var(--ink);border-radius:12px;padding:10px;font-size:13px;font-weight:600;flex:1}

/* misc */
.empty-state{text-align:center;color:var(--muted);padding:44px 20px;font-size:14px}
.crumb{font-size:12.5px;color:var(--muted);margin-bottom:12px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--acc)}
footer.ver{text-align:center;color:var(--muted);font-size:11.5px;padding:26px 0 10px;opacity:.7}
.ver-table{width:100%;border-collapse:collapse;font-size:13.5px}
.ver-table td,.ver-table th{padding:10px 12px;border-bottom:1px solid var(--line);text-align:right}
.ver-table th{color:var(--muted);font-weight:600;font-size:12px}
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.login-bg{position:absolute;inset:0;background:url('covers/hero-damascus.jpg') center/cover;filter:brightness(.4) saturate(.9)}
.login-card{position:relative;background:rgba(20,25,19,.82);backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.09);border-radius:26px;padding:42px 40px;max-width:420px;width:92%;text-align:center;color:#F1F4EC}
.login-card .logo-mark{width:72px;height:72px;border-radius:20px;margin:0 auto 18px}
.login-card h1{font-size:27px;margin-bottom:8px}
.login-card p{color:rgba(241,244,236,.72);font-size:14px;line-height:1.7;margin-bottom:26px}
.g-btn{display:flex;align-items:center;justify-content:center;gap:11px;background:#fff;color:#1f1f1f;border-radius:13px;padding:12px 20px;font-size:15px;font-weight:600;width:100%;border:none;transition:.15s}
.g-btn:hover{background:#f0f0f0}
.g-btn svg{width:19px;height:19px}
.login-err{background:rgba(225,103,142,.15);border:1px solid rgba(225,103,142,.4);color:#F3B7C9;border-radius:12px;padding:10px 14px;font-size:13px;margin-bottom:16px}
.badge-admin{background:var(--chip);color:var(--acc);font-size:10.5px;border-radius:7px;padding:2px 8px;font-weight:700}

/* responsive */
/* home side cards + course toggles (v0.2.3) */
.home-cols{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px;align-items:start}
.home-main{min-width:0;grid-column:1;grid-row:1}
.home-side{grid-column:2;grid-row:1;display:flex;flex-direction:column;gap:14px;position:sticky;top:16px}
.side-card{padding:16px 18px}
.sc-t{font-size:13px;font-weight:700;margin:0 0 8px}
.sc-num{font-size:22px;font-weight:800}
.sc-sub{font-size:12px;color:var(--muted);margin-top:4px}
.card.card-done{opacity:.55}
.card.card-done:hover{opacity:.85}
.done-label{color:var(--acc);font-size:12.5px;font-weight:700;margin-top:6px}
.week-mini{display:flex;align-items:flex-end;gap:8px;height:56px;margin:10px 0 8px}
button.v-mark{cursor:pointer;padding:0;font-size:12px;background:none}
button.v-mark:hover{border-color:var(--acc)}
.chapter>summary .t{flex:1;min-width:0}
.ch-num{width:26px;height:26px;border-radius:8px;background:var(--chip);color:var(--muted);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:.2s}
.chapter.all-done>summary .ch-num{background:var(--p1);color:#10140F}
.ch-progress{width:56px;height:5px;border-radius:3px;background:var(--chip);overflow:hidden;flex-shrink:0}
.ch-progress i{display:block;height:100%;background:var(--grad);transition:width .3s}
.ch-toggle{width:26px;height:26px;border-radius:8px;border:1px solid var(--line);background:var(--chip);color:var(--muted);cursor:pointer;font-size:13px;display:flex;align-items:center;justify-content:center;padding:0;flex-shrink:0}
.ch-toggle:hover{color:var(--text);border-color:var(--acc)}
.ch-toggle.on{background:var(--p1);border-color:var(--p1);color:#10140F}
.chapter[open] .lesson-row{animation:fadeSlide .25s ease}
@keyframes fadeSlide{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}
.continue-card{display:flex;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:12px;margin:14px 0;text-decoration:none;color:var(--text)}
.continue-card:hover{border-color:var(--acc)}
.cc-thumb{width:128px;aspect-ratio:16/9;border-radius:10px;background:var(--chip) center/cover;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.cc-play{width:34px;height:34px;border-radius:50%;background:rgba(16,20,15,.55);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px}
.cc-meta{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.cc-kicker{font-size:11px;font-weight:700;color:var(--acc)}
.cc-title{font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cc-sub{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cc-btn{background:var(--grad);color:#10140F;padding:9px 18px;border-radius:10px;font-weight:700;font-size:13px;flex-shrink:0}
.search{position:relative}
.search-dd{position:absolute;top:calc(100% + 6px);right:0;width:440px;max-width:calc(100vw - 24px);background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:0 12px 30px rgba(16,20,15,.18);z-index:60}
.sd-item{display:flex;align-items:center;gap:10px;padding:9px 12px;text-decoration:none;color:var(--text)}
.sd-item:hover,.sd-item.sel{background:var(--chip)}
.sd-thumb{width:48px;aspect-ratio:16/9;border-radius:6px;background:var(--chip) center/cover;flex-shrink:0}
.sd-t{flex:1;min-width:0;font-size:13px;line-height:1.35;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sd-c{font-size:11px;color:var(--muted);flex-shrink:0}
@media(max-width:700px){.cc-thumb{width:96px}.cc-btn{display:none}}
.search-group{margin-bottom:18px}
.sg-head{display:flex;align-items:baseline;gap:10px;margin:0 2px 8px}
.sg-head b{font-size:15px}
.sg-head span{font-size:12px;color:var(--muted)}
.sr-card{display:flex;align-items:center;gap:12px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:10px;margin-bottom:8px;text-decoration:none;color:var(--text)}
.sr-card:hover{border-color:var(--acc)}
.sr-card.done{opacity:.62}
.sr-thumb{position:relative;width:110px;aspect-ratio:16/9;border-radius:9px;background:var(--chip) center/cover;flex-shrink:0}
.sr-kind{position:absolute;bottom:4px;right:4px;background:rgba(16,20,15,.7);color:#fff;font-size:10px;padding:1px 7px;border-radius:6px}
.sr-done{position:absolute;top:4px;left:4px;width:20px;height:20px;border-radius:50%;background:var(--p1);color:#10140F;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}
.sr-meta{flex:1;min-width:0;display:flex;flex-direction:column;gap:5px}
.sr-title{font-weight:600;font-size:14px;line-height:1.4}
.sr-title mark{background:var(--p1);color:#10140F;border-radius:3px;padding:0 2px}
.sr-chips{display:flex;gap:6px;flex-wrap:wrap}
.done-chip{background:var(--p1)!important;color:#10140F!important}
.sr-go{color:var(--muted);font-size:20px;flex-shrink:0;padding-left:6px}
@media(max-width:700px){.sr-thumb{width:84px}}
@media (max-width:980px){
  .home-cols{grid-template-columns:1fr}
  .home-main{grid-column:auto;grid-row:auto}
  .home-side{grid-column:auto;grid-row:auto;position:static;display:grid;grid-template-columns:1fr 1fr;order:-1}
}
@media (max-width:980px){
  .lesson-grid{grid-template-columns:1fr}
  .check-card{position:static}
  .pgrid{grid-template-columns:1fr}
}
@media (max-width:760px){
  .app{flex-direction:column}
  .sidebar{width:100%;height:auto;position:static;flex-direction:row;align-items:center;padding:12px 14px;gap:8px;overflow-x:auto;border-left:none;border-bottom:1px solid var(--line)}
  .logo{margin-bottom:0}
  .logo b{display:none}
  .search{margin-bottom:0;flex:1;min-width:120px}
  .nav-label,.sidebar-foot .user-chip .nm,.sidebar-foot .theme-toggle span{display:none}
  .nav-item{margin-bottom:0;padding:9px 10px}
  .nav-item .nvt{display:none}
  .sidebar-foot{margin:0;flex-direction:row;align-items:center}
  .theme-toggle{width:auto;padding:8px 10px}
  .main{padding:16px 14px 110px}
  .stats{grid-template-columns:1fr 1fr}
  .hero h2{font-size:21px}
  .profile-hero .pstats{margin:0}
}

/* v0.2.0 */
html,body{overflow-x:clip}
.main{min-width:0}
.crumb{overflow-wrap:anywhere}
.player-bar{flex-wrap:wrap;gap:8px}
.lesson-row .thumb-sm{width:64px;height:38px;border-radius:9px;object-fit:cover;flex-shrink:0;background:var(--chip)}
.attach-item{margin-bottom:10px}
.attach-item .attach-card{margin-bottom:0}
.attach-preview{display:none;margin-top:8px}
.attach-preview.open{display:block}
.attach-preview iframe{width:100%;height:65vh;border:1px solid var(--line);border-radius:14px;background:#fff}
@media (max-width:760px){
  .lesson-title-row{flex-wrap:wrap}
  .lesson-row .thumb-sm{width:52px;height:32px}
  .attach-preview iframe{height:55vh}
}

@media(max-width:700px){.search-dd{width:calc(100vw - 32px)}}