:root{
  --bg:#0D0D0D;--surface:#141414;--surface-2:#1D1D1D;
  --line:rgba(255,255,255,.07);--line-2:rgba(255,255,255,.12);
  --fg:#FFFFFF;--muted:rgba(255,255,255,.52);--muted-2:rgba(255,255,255,.34);
  --btn:#DADADA;--ok:#2ec16b;--play:#ff5c33;--star:#f5b301;--info:#2f7fe0;--danger:#e0533f;
  color-scheme:dark;
  --f-display:"Titillium Web",system-ui,sans-serif;--f-body:"Nunito Sans",system-ui,sans-serif;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--f-body);font-size:14px;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-family:var(--f-display);margin:0;text-wrap:balance;font-weight:700}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
img{display:block;max-width:100%}
[hidden]{display:none!important}
svg.ic{width:1.15em;height:1.15em;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:none}
svg.ic.fill{fill:currentColor;stroke:none}
::-webkit-scrollbar{height:9px;width:9px}::-webkit-scrollbar-thumb{background:#2a2a2a;border-radius:9px}

.topbar{position:sticky;top:0;z-index:40;height:50px;display:flex;align-items:center;gap:18px;background:var(--surface);border-bottom:1px solid var(--line);padding:0 16px}
.brand{display:flex;align-items:center;gap:9px;font-family:var(--f-display);font-weight:900;letter-spacing:.04em;font-size:13px;white-space:nowrap}
.brand .mark{width:18px;height:18px;border-radius:4px;background:linear-gradient(135deg,#fff,#8a8a8a);flex:none}
.search{flex:1;max-width:340px;display:flex;align-items:center;gap:8px;background:#0c0c0c;border:1px solid var(--line-2);border-radius:7px;padding:7px 11px;color:var(--muted)}
.search input{flex:1;background:none;border:0;outline:0;color:var(--fg);font-family:inherit;font-size:13px}
.search input::placeholder{color:var(--muted-2)}
.top-right{margin-left:auto;display:flex;align-items:center;gap:16px;color:var(--muted)}
.top-right .me{display:flex;align-items:center;gap:8px;color:var(--fg)}
.top-right .ava{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,#e8e8e8,#777);flex:none}
.demo-chip{background:rgba(245,179,1,.16);color:var(--star);border:1px solid rgba(245,179,1,.4);font-size:10px;font-weight:800;letter-spacing:.06em;padding:3px 8px;border-radius:6px}

.shell{display:flex;align-items:flex-start}
.sidebar{position:sticky;top:50px;align-self:flex-start;width:228px;flex:none;height:calc(100vh - 50px);background:var(--bg);border-right:1px solid var(--line);padding:22px 14px 16px;display:flex;flex-direction:column;gap:6px;overflow:auto}
.profile{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;padding:6px 6px 16px}
.profile .ava{width:68px;height:68px;border-radius:50%;background:linear-gradient(135deg,#eee,#6f6f6f);border:2px solid #2a2a2a}
.profile .nm{font-family:var(--f-display);font-weight:700;font-size:15px}
.progress-wrap{width:100%;margin-top:2px}
.progress-wrap .lbl{font-size:10.5px;color:var(--muted-2);text-align:left;margin-bottom:5px}
.bar{height:3px;border-radius:3px;background:#262626;overflow:hidden}.bar>i{display:block;height:100%;background:var(--ok);border-radius:3px}
.nav{display:flex;flex-direction:column;gap:2px;margin-top:8px}
.nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:8px;color:var(--muted);font-size:13.5px;font-weight:600}
.nav a svg{font-size:17px}.nav a:hover{color:var(--fg);background:#161616}.nav a.on{color:var(--fg);background:#191919}
.side-foot{margin-top:auto;padding-top:14px;display:flex;flex-direction:column;gap:7px}
.side-foot a{font-size:11px;color:var(--muted-2)}.side-foot a:hover{color:var(--muted)}

.content{flex:1;min-width:0;min-height:calc(100vh - 50px);padding:0 0 60px;display:flex;flex-direction:column}
.wrap{padding:0 18px}

.hero{position:relative;width:100%;background:#000;overflow:hidden}
.hero .slides{position:relative;width:100%;aspect-ratio:1903/560;max-height:460px}
.hero .slides a{position:absolute;inset:0;opacity:0;transition:opacity .6s}
.hero .slides a.on{opacity:1}
.hero .slides img{width:100%;height:100%;object-fit:cover}
.hero .harr{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:38px;height:38px;border-radius:50%;border:0;background:rgba(0,0,0,.4);color:#fff;display:grid;place-items:center}
.hero .harr:hover{background:rgba(0,0,0,.65)}.hero .harr.l{left:14px}.hero .harr.r{right:14px}
.hero .dots{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);z-index:3;display:flex;gap:7px}
.hero .dots b{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer}.hero .dots b.on{background:#fff;width:20px;border-radius:5px}

.dash-sec{margin-top:30px}
.sec-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.sec-head h2{font-size:19px;font-weight:700}.sec-head p{color:var(--muted-2);font-size:12px;margin-top:2px}
.sec-head .arrows{margin-left:auto;display:flex;gap:7px}
.arrows button{width:30px;height:30px;border-radius:50%;border:1px solid var(--line-2);background:#141414;color:var(--fg);display:grid;place-items:center}.arrows button:hover{background:#1f1f1f}
.rail{display:flex;gap:14px;overflow-x:auto;scroll-behavior:smooth;padding-bottom:6px;cursor:grab;scroll-snap-type:x proximity;scrollbar-width:none;-ms-overflow-style:none}
.rail::-webkit-scrollbar{display:none;width:0;height:0}
.rail.dragging{cursor:grabbing;scroll-snap-type:none;user-select:none}
.rail .pcard,.rail .card{scroll-snap-align:start}
.rail img{-webkit-user-drag:none;user-select:none}

.pcard{flex:none;width:158px;cursor:pointer}
.pcard .pcover{aspect-ratio:29/50;border-radius:11px;overflow:hidden;border:1px solid var(--line-2);box-shadow:0 8px 20px rgba(0,0,0,.4);background:#111;position:relative}
.pcard .pcover img{width:100%;height:100%;object-fit:cover}
.pcard:hover .pcover{transform:translateY(-4px);transition:transform .18s;border-color:#444}
.pcard .cname{font-family:var(--f-display);font-weight:600;font-size:12.5px;margin-top:8px;color:#e9e9e9;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.card{cursor:pointer}
.cover{aspect-ratio:16/10;border-radius:10px;overflow:hidden;position:relative;border:1px solid var(--line-2);box-shadow:0 6px 18px rgba(0,0,0,.35);background:#141414;display:grid;place-items:center}
.cover img{width:100%;height:100%;object-fit:cover}
.cover .ph{display:flex;flex-direction:column;align-items:center;gap:8px;color:var(--muted-2);padding:0 10px;text-align:center}
.cover .ph .m{width:30px;height:30px;border-radius:7px;background:linear-gradient(135deg,#3a3a3a,#1a1a1a);display:grid;place-items:center;font-family:var(--f-display);font-weight:900;color:#777}
.card:hover .cover{transform:translateY(-3px);transition:transform .18s;border-color:#3a3a3a}
.card .meta{display:flex;align-items:center;gap:10px;margin-top:9px;color:var(--muted);font-size:11.5px}
.card .meta .st{letter-spacing:1px;color:var(--star)}
.card .cname{font-family:var(--f-display);font-weight:600;font-size:13px;margin-top:7px;color:#e9e9e9;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.page-head{padding-top:26px}.page-head h1{font-size:23px}.page-head p{color:var(--muted);margin-top:4px;font-size:13px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:18px}

/* ---- player ---- */
.player-shell{display:grid;grid-template-columns:1fr 360px;min-height:calc(100vh - 50px)}
.player-main{min-width:0}
.video{aspect-ratio:16/9;position:relative;background:#000;display:grid;place-items:center}
.video video,.video iframe{width:100%;height:100%;border:0;display:block;background:#000}
.video .vph{color:var(--muted);text-align:center;padding:20px}
.lesson-bar{padding:18px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.lesson-bar h1{font-size:19px;flex:1;min-width:180px}
.actions{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.modpanel{border-left:1px solid var(--line);background:var(--surface);min-width:0;max-height:calc(100vh - 50px);overflow:auto}
.modpanel .mh{padding:16px;border-bottom:1px solid var(--line);position:sticky;top:0;background:var(--surface);z-index:2}
.modpanel .mh h3{font-size:14px}
.modpanel .mh p{color:var(--muted-2);font-size:11.5px;margin-top:4px}
.lesson{display:flex;align-items:center;gap:11px;padding:11px 16px;border-bottom:1px solid var(--line);cursor:pointer}
.lesson:hover{background:#181818}.lesson.on{background:#1b1b1b;box-shadow:inset 3px 0 0 var(--ok)}
.lesson .thumb{width:54px;height:33px;border-radius:5px;flex:none;border:1px solid var(--line-2);display:grid;place-items:center;background:#222;font-family:var(--f-display);font-weight:900;font-size:12px;color:#fff}
.lesson .lt{flex:1;min-width:0;font-size:12.5px;line-height:1.25}
.lesson .mod{color:var(--muted-2);font-size:10px;margin-top:2px}
.check{width:20px;height:20px;border-radius:50%;flex:none;display:grid;place-items:center;border:1.5px solid #3a3a3a;color:transparent}
.lesson.done .check{background:var(--ok);border-color:var(--ok);color:#07140c}.lesson.done .check svg{width:12px;height:12px}
@media(max-width:860px){.player-shell{grid-template-columns:1fr}.modpanel{border-left:0;border-top:1px solid var(--line);max-height:none}}

/* ---- forms / tables / admin ---- */
.inp{width:100%;background:#0c0c0c;border:1px solid var(--line-2);border-radius:7px;color:var(--fg);padding:10px 12px;font-family:inherit;font-size:13px}
textarea.inp{min-height:90px;resize:vertical}
label.fl{display:block;font-size:11.5px;color:var(--muted);margin:0 0 6px}
.field{margin-bottom:14px}
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:8px;padding:9px 14px;font-weight:700;font-size:12.5px;border:1px solid var(--line-2);background:#161616;color:var(--fg)}
.btn.primary{background:var(--ok);border-color:transparent;color:#07140c}
.btn.light{background:var(--btn);border-color:transparent;color:#111}
.btn.out{background:transparent;border-color:var(--line-2)}
.btn.danger{background:transparent;border-color:rgba(224,83,63,.5);color:#e88}
.btn.sm{padding:6px 10px;font-size:11.5px}
.tblwrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;margin-top:14px}
.atbl{width:100%;border-collapse:collapse;font-size:12.5px;min-width:620px}
.atbl th{text-align:left;color:var(--muted);font-weight:600;font-size:10.5px;padding:11px 14px;border-bottom:1px solid var(--line);text-transform:uppercase;letter-spacing:.04em;white-space:nowrap}
.atbl td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
.atbl tr:last-child td{border-bottom:0}.atbl tr:hover td{background:#171717}
.tgl{width:36px;height:19px;border-radius:19px;background:#3a3a3a;position:relative;display:inline-block;flex:none;border:0;padding:0}
.tgl.on{background:var(--ok)}.tgl i{position:absolute;top:2px;left:2px;width:15px;height:15px;border-radius:50%;background:#fff;transition:.15s}.tgl.on i{left:19px}
.empty{text-align:center;color:var(--muted);padding:56px 20px;border:1px dashed var(--line-2);border-radius:12px;margin-top:16px}
.empty h4{color:#cfcfcf;margin-bottom:6px;font-size:15px}
.statrow{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:11px;padding:14px 18px;min-width:150px}
.stat .k{color:var(--muted-2);font-size:11px}.stat .v{font-family:var(--f-display);font-weight:900;font-size:20px;margin-top:3px}
.admin-group{margin-top:26px}
.admin-group>h3{font-size:16px}.admin-group>.gd{color:var(--muted-2);font-size:12px;margin:2px 0 13px}
.admin-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(236px,1fr));gap:13px}
.acard{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:15px;cursor:pointer;display:flex;gap:12px;min-height:94px;position:relative}
.acard:hover{border-color:#3a3a3a;background:#171717}
.acard.soon{opacity:.6}
.acard .ai{width:40px;height:40px;border-radius:9px;background:#1d1d1d;border:1px solid var(--line-2);display:grid;place-items:center;color:var(--muted);flex:none}
.acard .ac{min-width:0}
.acard .ac h4{font-size:13.5px;display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.acard .ac .badge{background:#242424;color:var(--muted);font-size:10px;padding:1px 6px;border-radius:5px;font-weight:700}
.acard .ac .ntag{background:rgba(46,193,107,.16);color:var(--ok);font-size:9px;padding:1px 6px;border-radius:5px;font-weight:700}
.acard .ac p{color:var(--muted-2);font-size:11.5px;margin-top:5px;line-height:1.35}
.flash{border-radius:9px;padding:11px 14px;font-size:12.5px;margin:14px 0;border:1px solid}
.flash.ok{background:rgba(46,193,107,.12);border-color:rgba(46,193,107,.35);color:#bfe9cf}
.flash.err{background:rgba(224,83,63,.12);border-color:rgba(224,83,63,.35);color:#f0b4aa}
.flash.info{background:rgba(47,127,224,.12);border-color:rgba(47,127,224,.3);color:#cfe0f5}
.card-box{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px;margin-top:16px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.thumb-sm{width:90px;height:50px;border-radius:6px;object-fit:cover;border:1px solid var(--line-2);background:#111}
.crumbs{color:var(--muted);font-size:12px;display:flex;gap:8px;align-items:center;padding-top:18px}
.crumbs a:hover{color:var(--fg)}
.tabs{display:flex;gap:24px;border-bottom:1px solid var(--line);margin:18px 0 22px;flex-wrap:wrap}
.tab{padding:0 0 12px;color:var(--muted);font-weight:600;font-size:13px;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}
.tab.on{color:var(--fg);border-color:var(--fg)}
.pane[hidden]{display:none}
.info-strip{background:rgba(47,127,224,.12);border:1px solid rgba(47,127,224,.3);color:#cfe0f5;border-radius:9px;padding:12px 14px;font-size:12.5px;margin-top:16px;display:flex;gap:10px}
.info-strip svg{flex:none;color:var(--info);margin-top:1px}
.embed{margin-top:20px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface)}
.embed .eb{padding:9px 14px;border-bottom:1px solid var(--line);color:var(--muted);font-size:12px;display:flex;gap:8px;align-items:center}
.embed iframe{width:100%;height:68vh;border:0;display:block;background:#0c0c0c}
.forum-hero{display:flex;gap:16px;align-items:center;background:linear-gradient(90deg,#1c1c1c,#0f0f0f);border:1px solid var(--line);border-radius:12px;padding:16px;margin-top:20px}
.forum-hero .fb{width:150px;aspect-ratio:16/8;border-radius:9px;background:linear-gradient(135deg,#333,#111);display:grid;place-items:center;font-family:var(--f-display);font-weight:900;color:#888;letter-spacing:.1em;flex:none}
.listrow{display:flex;gap:14px;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:11px;background:var(--surface);margin-top:10px}
.listrow .lmark{width:42px;height:42px;border-radius:9px;background:linear-gradient(135deg,#2a2a2a,#121212);flex:none;display:grid;place-items:center;color:#777;font-family:var(--f-display);font-weight:900;overflow:hidden}
.listrow .lmark img{width:100%;height:100%;object-fit:cover}
.listrow .li{flex:1;min-width:0}.listrow .li h4{font-size:13.5px}.listrow .li p{color:var(--muted-2);font-size:11.5px;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chkgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px;margin:12px 0;max-height:280px;overflow:auto;padding:4px;border:1px solid var(--line);border-radius:10px}
.chk{display:flex;gap:9px;align-items:center;font-size:12.5px;padding:7px 9px;border-radius:7px}
.chk:hover{background:#171717}.chk input{width:15px;height:15px;accent-color:var(--ok)}
.rowflex{display:flex;gap:10px;align-items:flex-end;flex-wrap:wrap}
.rowflex .field{margin-bottom:0}

/* ---- login ---- */
.login-page{min-height:100vh;display:grid;place-items:center;background:#050505;padding:24px}
.login-box{width:100%;max-width:380px;background:var(--surface-2);border:1px solid var(--line);border-radius:14px;padding:30px 26px}
.login-box .brand{justify-content:center;font-size:15px;margin-bottom:6px}
.login-box h1{font-size:18px;text-align:center;margin-bottom:4px}
.login-box .sub{text-align:center;color:var(--muted);font-size:12.5px;margin-bottom:22px}

@media(max-width:860px){
  .sidebar{position:fixed;top:50px;left:0;z-index:35;transform:translateX(-100%);transition:transform .22s;box-shadow:0 20px 50px rgba(0,0,0,.6)}
  .sidebar.open{transform:none}
  .row2{grid-template-columns:1fr}
}
@media(max-width:520px){.brand span{display:none}.search{max-width:none}}