:root{
  --bg:#0B0B0D; --panel:#17171B; --line:#2A2A30; --text:#F4F1EA; --muted:rgba(244,241,234,.6); --faint:rgba(244,241,234,.38);
  --yellow:#F7C948; --gold:#C9A24A; --green:#3DDC84; --red:#F05252;
  --holo:linear-gradient(100deg,#7DD3FC,#A78BFA 35%,#F472B6 68%,#F7C948);
  --head:'Space Grotesk',system-ui,sans-serif; --body:'Inter',system-ui,sans-serif; --mono:'JetBrains Mono',ui-monospace,monospace;
  --r:20px; --shadow:0 18px 40px -18px rgba(0,0,0,.8),0 2px 6px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 var(--body);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit}
.label{font:500 11px var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
h1,h2,h3{font-family:var(--head);font-weight:600;letter-spacing:-.02em;margin:0}
h1{font-size:40px;line-height:1.1}
h2{font-size:26px;line-height:1.2}
h3{font-size:19px}
p{margin:0 0 12px}
.muted{color:var(--muted)} .faint{color:var(--faint)}
.holo-text{background:var(--holo);-webkit-background-clip:text;background-clip:text;color:transparent}

/* shell */
.shell{display:grid;grid-template-columns:280px 1fr;min-height:100vh}
.side{position:sticky;top:0;height:100vh;overflow:auto;background:var(--panel);border-right:1px solid var(--line);padding:26px 18px 18px;display:flex;flex-direction:column;gap:6px}
.me{margin-top:auto!important}
.side .logo img{height:26px;width:auto;margin:0 8px 22px}
.side .label{margin:18px 10px 8px}
.nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:12px;color:var(--muted);font-size:15px;border-left:2px solid transparent;transition:background .15s,color .15s}
.nav a:hover{color:var(--text);background:rgba(244,241,234,.04)}
.nav a.on{color:var(--text);background:#202027;border-left-color:var(--yellow)}
.nav svg{width:18px;height:18px;flex:none}
.nav .price{margin-left:auto;font:500 12px var(--mono);color:var(--gold);display:flex;align-items:center;gap:6px}
.nav .price svg{width:13px;height:13px;color:var(--faint)}
.ic-card{margin-top:auto;border:1px solid var(--line);border-radius:16px;padding:16px;background:linear-gradient(180deg,rgba(201,162,74,.08),transparent)}
.ic-card p{font-size:13px;color:var(--muted);margin:6px 0 12px}
.me{display:flex;align-items:center;gap:10px;margin-top:14px;padding:8px}
.avatar{width:36px;height:36px;border-radius:50%;padding:2px;background:var(--holo);flex:none}
.avatar span{display:grid;place-items:center;width:100%;height:100%;border-radius:50%;background:var(--panel);font:600 14px var(--head)}
.me .em{font-size:13px;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.me button{background:none;border:0;color:var(--faint);font-size:13px;cursor:pointer;padding:0}
.topbar{display:none}
main{padding:40px 48px 60px;max-width:1180px;width:100%;animation:fade .35s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.footer{margin-top:56px;font-size:12px;color:var(--faint)}

/* bits */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:0;border-radius:999px;background:var(--yellow);color:#0B0B0D;font:600 15px var(--body);padding:13px 22px;cursor:pointer;transition:filter .15s,transform .15s;white-space:nowrap}
.btn:hover{filter:brightness(1.07)} .btn:active{transform:scale(.98)}
.btn.lg{padding:17px 30px;font-size:17px}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn.ghost:hover{border-color:#44444c}
.btn.small{padding:8px 14px;font-size:13px}
.btn.danger{background:transparent;color:var(--red);border:1px solid rgba(240,82,82,.4)}
.btn svg{width:18px;height:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
a.card:hover,.card.hover:hover{transform:translateY(-2px);box-shadow:var(--shadow),0 0 0 1px rgba(167,139,250,.25),0 10px 40px -10px rgba(244,114,182,.25)}
.grid{display:grid;gap:18px}
.g4{grid-template-columns:repeat(4,1fr)} .g3{grid-template-columns:repeat(3,1fr)} .g2{grid-template-columns:repeat(2,1fr)}
.head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.stat .n{font:600 36px var(--head);letter-spacing:-.02em;margin:10px 0 4px}
.stat .s{font-size:13px;color:var(--green)} .stat .s.hint{color:var(--faint)}
.bar{height:6px;border-radius:99px;background:#24242a;overflow:hidden}
.bar i{display:block;height:100%;background:var(--holo);border-radius:99px;transition:width .8s ease}
.chip{display:inline-block;font:500 11px var(--mono);letter-spacing:.1em;text-transform:uppercase;padding:5px 9px;border-radius:999px;white-space:nowrap}
.chip.grade{background:rgba(201,162,74,.16);color:var(--gold)}
.chip.sell{background:rgba(61,220,132,.12);color:var(--green)}
.chip.keep,.chip.raw,.chip.dont,.chip.no_price,.chip.not_card,.chip.maybe{background:rgba(244,241,234,.07);color:var(--muted)}
.chip.fake{background:rgba(240,82,82,.14);color:var(--red)}
.empty{text-align:center;padding:36px 20px;color:var(--muted)}
.empty svg{width:34px;height:34px;color:var(--faint);margin:0 auto 12px}
.empty p{margin-bottom:16px}
.thumb{width:44px;height:58px;border-radius:7px;border:1.5px solid var(--yellow);background:var(--holo);opacity:.85;flex:none;object-fit:cover}
img.thumb{opacity:1;background:#000}
.list .item{display:flex;align-items:center;gap:14px;padding:12px 0;border-top:1px solid var(--line)}
.list .item:first-child{border-top:0}
.list .item .grow{flex:1;min-width:0}
.list .item .t{font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.mono{font-family:var(--mono)}
.gold{color:var(--gold)} .green{color:var(--green)} .red{color:var(--red)}

/* hero */
.hero{position:relative;overflow:hidden;border-radius:24px;border:1px solid var(--line);padding:48px;min-height:300px;display:flex;flex-direction:column;justify-content:center;gap:16px;background:#0e0e11;box-shadow:var(--shadow)}
.hero h2{font-size:38px;max-width:560px;line-height:1.1}
.hero .label{color:var(--yellow)}
.hero .btn{align-self:flex-start}
.hero .slabs{position:absolute;right:-30px;top:50%;transform:translateY(-50%);width:440px;height:340px;pointer-events:none}
.slab{position:absolute;width:150px;height:240px;border-radius:14px;background:linear-gradient(180deg,#1d1d22,#121216);border:1px solid #33333a;box-shadow:0 30px 60px -20px #000;padding:10px}
.slab::before{content:"";display:block;height:30px;border-radius:6px;background:linear-gradient(90deg,#F7C948,#e3b43a)}
.slab::after{content:"";display:block;margin-top:10px;height:170px;border-radius:8px;background:var(--holo);opacity:.75;filter:saturate(1.1)}
.slab:nth-child(1){left:40px;top:60px;transform:rotate(-14deg);opacity:.55}
.slab:nth-child(2){left:150px;top:40px;transform:rotate(-2deg);opacity:.8}
.slab:nth-child(3){left:260px;top:60px;transform:rotate(12deg);opacity:.65}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 80% 50%,transparent,rgba(11,11,13,.2) 40%,rgba(11,11,13,.85) 80%);pointer-events:none}
.hero>*:not(.slabs){position:relative;z-index:1}

/* tiles */
.tile{display:flex;flex-direction:column;gap:10px}
.tile .top{display:flex;justify-content:space-between;align-items:center}
.tile .lock{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:#202027;color:var(--faint)}
.tile .lock svg{width:17px;height:17px}
.pill{font:500 13px var(--mono);color:#0B0B0D;background:var(--gold);border-radius:999px;padding:4px 11px}
.tile p{font-size:14px;color:var(--muted);flex:1}

/* course */
.module{display:flex;flex-direction:column;gap:12px;cursor:pointer}
.module .no{font:500 13px var(--mono);color:var(--gold);letter-spacing:.14em}
.ring{--p:0;width:52px;height:52px;border-radius:50%;background:conic-gradient(#A78BFA calc(var(--p)*1%),#24242a 0);display:grid;place-items:center}
.ring span{width:42px;height:42px;border-radius:50%;background:var(--panel);display:grid;place-items:center;font:500 11px var(--mono)}
.lesson-row{display:flex;align-items:center;gap:14px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;background:var(--panel);margin-bottom:10px;transition:border-color .15s}
.lesson-row:hover{border-color:#3d3d45}
.tick{width:26px;height:26px;border-radius:50%;border:1.5px solid var(--line);display:grid;place-items:center;flex:none}
.tick.on{background:var(--green);border-color:var(--green);color:#0B0B0D}
.tick svg{width:14px;height:14px}
.video{aspect-ratio:16/9;border-radius:18px;border:1px solid var(--line);background:#0f0f12;display:grid;place-items:center;overflow:hidden;margin:20px 0}
.video iframe,.video video{width:100%;height:100%;border:0}
.video .ph{font:500 13px var(--mono);letter-spacing:.12em;color:var(--faint);text-align:center;padding:20px}
.notes{max-width:720px}
.notes ul{padding-left:20px;margin:6px 0 16px} .notes li{margin:4px 0}
.downloads{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0}

/* table */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--panel)}
table{width:100%;border-collapse:collapse;font-size:14px}
th{font:500 11px var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--gold);text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);white-space:nowrap}
td{padding:13px 16px;border-bottom:1px solid var(--line);vertical-align:middle}
tr:last-child td{border-bottom:0}
td.num{font-family:var(--mono);white-space:nowrap}
.rowbtn{background:none;border:0;color:var(--faint);cursor:pointer;padding:4px 6px}
.rowbtn:hover{color:var(--text)}
.strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.strip .card{padding:18px}
.strip .n{font:600 24px var(--head);margin-top:6px}

/* forms + drawer */
.form{display:grid;gap:14px}
.form label{display:grid;gap:6px;font-size:13px;color:var(--muted)}
.form input,.form select,.form textarea{background:#0f0f12;border:1px solid var(--line);border-radius:12px;color:var(--text);font:15px var(--body);padding:12px 13px;outline:none;width:100%}
.form textarea{min-height:120px;resize:vertical}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--yellow)}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.seg{display:flex;gap:8px}
.seg button{flex:1;padding:10px;border-radius:12px;border:1px solid var(--line);background:#0f0f12;cursor:pointer;font:500 12px var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.seg button.on{border-color:var(--yellow);color:var(--text);background:#1d1c17}
.err{color:var(--red);font-size:14px;min-height:1em}
.drawer-bg{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:50;animation:fadebg .2s}
@keyframes fadebg{from{opacity:0}}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(440px,100%);background:var(--panel);border-left:1px solid var(--line);z-index:51;padding:28px;overflow:auto;animation:slide .25s ease}
@keyframes slide{from{transform:translateX(30px);opacity:0}}

/* calculator + checklist */
.verdict-card{border-radius:var(--r);padding:28px;border:1px solid var(--line);background:#121215}
.verdict-card .big{font:600 34px var(--head);letter-spacing:-.02em;margin:8px 0}
.verdict-card.go{border-color:rgba(201,162,74,.5);background:linear-gradient(180deg,rgba(201,162,74,.1),#121215)} .verdict-card.go .big{color:var(--gold)}
.verdict-card.no{border-color:rgba(240,82,82,.4);background:linear-gradient(180deg,rgba(240,82,82,.08),#121215)} .verdict-card.no .big{color:var(--red)}
.check{display:flex;gap:16px;padding:18px;border:1px solid var(--line);border-radius:16px;background:var(--panel);cursor:pointer;margin-bottom:10px;transition:border-color .15s}
.check:hover{border-color:#3d3d45}
.check .box{width:26px;height:26px;border-radius:8px;border:1.5px solid #4a4a52;display:grid;place-items:center;flex:none;margin-top:2px}
.check.on .box{background:var(--green);border-color:var(--green);color:#0B0B0D}
.check.on{border-color:rgba(61,220,132,.35)}
.check .box svg{width:15px;height:15px}
.check .sig{font-size:14px;color:var(--muted);margin-top:4px}
.check .sig b{color:var(--red);font-weight:500}

@media (max-width:1100px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}.hero .slabs{opacity:.5}}
@media (max-width:900px){
  .shell{grid-template-columns:1fr}
  .side{position:fixed;inset:0 auto 0 0;width:290px;z-index:60;transform:translateX(-100%);transition:transform .25s}
  .side.open{transform:none}
  .topbar{display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:40;background:rgba(11,11,13,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);padding:12px 18px}
  .topbar img{height:22px;width:auto}
  .topbar button{background:none;border:1px solid var(--line);border-radius:10px;padding:7px 9px;cursor:pointer}
  main{padding:26px 18px 50px}
  .g4,.g3,.g2,.strip{grid-template-columns:1fr}
  .strip{grid-template-columns:1fr 1fr}
  h1{font-size:32px}
  .hero{padding:30px 24px;min-height:0}
  .hero h2{font-size:28px}
  .hero .slabs{display:none}
  .form .row2{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

@media print{
  body{background:#fff;color:#000}
  .side,.topbar,.noprint,.footer{display:none!important}
  .shell{display:block} main{padding:0;max-width:none}
  .tablewrap{border:0;background:#fff} table{font-size:11px} th{color:#000;border-bottom:1px solid #000} td{border-bottom:1px solid #ddd;padding:5px 8px}
  .gold,.chip.grade{color:#8a6a10!important;background:none!important} .faint,.muted{color:#555!important}
  h1{font-size:22px;color:#000} .label{color:#8a6a10}
}