:root{
  --ink:#17212B; --ink-2:#4A5866; --ink-3:#7A8794;
  --paper:#F4F6F8; --surface:#fff; --line:#DCE2E8; --line-2:#C7CFD8;
  --blue:#1F4E79; --blue-2:#183F63; --blue-tint:#E6EEF6;
  --pass:#FFC72C; --pass-ink:#3D2E00;
  --open:#1F8A5B; --open-tint:#E3F3EB;
  --lock:#B93A27; --lock-tint:#FBE9E5;
  --warn-tint:#FFF3D1;
  --r:8px;
  --font:"Segoe UI",Roboto,system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.55 var(--font)}
h1,h2,h3{margin:0;line-height:1.15;letter-spacing:-.02em;font-weight:700}
h1{font-size:1.85rem} h2{font-size:1.3rem} h3{font-size:1.05rem}
p{margin:0}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--blue)}
:focus-visible{outline:3px solid #F2A900;outline-offset:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:#fff;padding:.5rem 1rem;z-index:99}
.skip:focus{left:0}
.muted{color:var(--ink-2)} .small{font-size:.875rem} .faint{color:var(--ink-3)}
.row{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}
.grow{flex:1 1 auto}
.stack{display:flex;flex-direction:column;gap:1rem}
.hidden{display:none!important}

/* ---------- shell ---------- */
.shell{display:grid;grid-template-columns:232px minmax(0,1fr);min-height:100vh}
.rail{background:var(--ink);color:#E9EEF3;display:flex;flex-direction:column;padding:20px 14px;position:sticky;top:0;height:100vh}
.brand{display:flex;align-items:center;gap:10px;padding:2px 8px 22px;font-weight:700;font-size:1.15rem;letter-spacing:-.02em;color:#fff;text-decoration:none}
.brand-mark{width:30px;height:30px;flex:none}
.nav{display:flex;flex-direction:column;gap:2px}
.nav a{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:var(--r);color:#C9D3DC;text-decoration:none;font-weight:500}
.nav a:hover{background:#243342;color:#fff}
.nav a[aria-current=page]{background:#2C3F52;color:#fff;box-shadow:inset 3px 0 0 var(--pass)}
.nav svg{width:20px;height:20px;flex:none}
.nav .sep{height:1px;background:#2A394A;margin:10px 8px}
.rail-foot{margin-top:auto;border-top:1px solid #2A394A;padding:14px 8px 0;font-size:.9rem}
.rail-foot .who{font-weight:600;color:#fff;overflow:hidden;text-overflow:ellipsis}
.rail-foot .role{color:#93A3B3;font-size:.8rem;margin-bottom:8px}
.rail-foot a,.rail-foot button{color:#C9D3DC;background:none;border:0;padding:4px 0;cursor:pointer;text-decoration:underline;font-size:.9rem;margin-right:12px}
main{padding:32px clamp(16px,4vw,48px) 64px;max-width:1080px;width:100%}
.page-head{margin-bottom:24px}
.page-head p{margin-top:6px;max-width:60ch}

/* ---------- buttons + forms ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:8px 16px;border-radius:var(--r);border:1px solid var(--line-2);background:var(--surface);cursor:pointer;font-weight:600;text-decoration:none;color:var(--ink)}
.btn:hover{border-color:var(--ink-3);background:#FBFCFD}
.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff}
.btn.primary:hover{background:var(--blue-2)}
.btn.danger{color:var(--lock);border-color:#E3B3AB}
.btn.danger:hover{background:var(--lock-tint)}
.btn.solid-danger{background:var(--lock);border-color:var(--lock);color:#fff}
.btn.small{min-height:32px;padding:4px 10px;font-size:.875rem}
.btn.ghost{border-color:transparent;background:none}
.btn.ghost:hover{background:var(--blue-tint)}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btn svg{width:18px;height:18px}
label.field{display:flex;flex-direction:column;gap:6px;font-weight:600;font-size:.92rem}
label.field .hint{font-weight:400;color:var(--ink-2);font-size:.85rem}
input[type=text],input[type=password],input[type=search],input[type=date],input[type=time],select,textarea{width:100%;min-height:42px;padding:8px 12px;border:1px solid var(--line-2);border-radius:var(--r);background:#fff}
textarea{resize:vertical;line-height:1.5}
input:focus,select:focus,textarea:focus{border-color:var(--blue);outline:3px solid rgba(31,78,121,.18);outline-offset:0}
.err{color:var(--lock);font-size:.9rem;min-height:1.3em}
.note{background:var(--warn-tint);border-left:4px solid var(--pass);padding:10px 14px;border-radius:0 var(--r) var(--r) 0;font-size:.92rem}

/* ---------- the pass ---------- */
.pass{display:grid;grid-template-columns:1fr 132px;background:var(--surface);border:1px solid var(--line-2);border-radius:14px 6px 6px 14px;overflow:hidden;margin-bottom:28px}
.pass-main{padding:22px 26px}
.pass-main h2{font-size:1.75rem;margin:4px 0 6px}
.pass-label{font-size:.85rem;color:var(--ink-2);font-weight:600}
.pass-stub{position:relative;background:var(--pass);color:var(--pass-ink);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:14px;text-align:center;font-weight:700}
.pass-stub::before{content:"";position:absolute;left:-1px;top:0;bottom:0;width:0;border-left:3px dotted rgba(23,33,43,.55)}
.pass-stub svg{width:38px;height:38px}
.pass.closed .pass-stub{background:#E7EAEE;color:#3B4652}
.pass.closed .pass-main h2{color:var(--lock)}
.pass.open .pass-main h2{color:var(--open)}
.pass.wait .pass-main h2{color:var(--ink)}
.pass.wait .pass-stub{background:#E7EAEE;color:#3B4652}

/* ---------- lists and tiles ---------- */
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.tile{display:flex;flex-direction:column;justify-content:flex-end;min-height:118px;padding:14px 16px;border-radius:10px;color:#fff;text-decoration:none;position:relative;border:0;cursor:pointer;text-align:left;font:inherit}
.tile:hover{filter:brightness(1.08)}
.tile .t{font-size:1.25rem;font-weight:700;letter-spacing:-.02em;line-height:1.1}
.tile .s{font-size:.85rem;opacity:.9;margin-top:4px}
.tile .tag{position:absolute;top:12px;left:16px;font-size:.78rem;font-weight:600;background:rgba(255,255,255,.2);padding:2px 8px;border-radius:99px}
.tile.locked{filter:grayscale(.85) brightness(.85);cursor:not-allowed}
.tile.locked:hover{filter:grayscale(.85) brightness(.85)}
.tool-tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.tool{display:flex;gap:14px;align-items:flex-start;padding:16px;background:var(--surface);border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink)}
.tool:hover{border-color:var(--blue)}
.tool svg{width:26px;height:26px;color:var(--blue);flex:none;margin-top:2px}
.tool b{display:block}
.list{background:var(--surface);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.list > *{padding:12px 16px;border-top:1px solid var(--line)}
.list > *:first-child{border-top:0}
.list-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.list a.list-row{text-decoration:none;color:inherit}
.list a.list-row:hover{background:#F8FAFB}
.empty{padding:36px 20px;text-align:center;color:var(--ink-2);background:var(--surface);border:1px dashed var(--line-2);border-radius:10px}
.empty h3{color:var(--ink);margin-bottom:6px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:2px 10px;border-radius:99px;font-size:.8rem;font-weight:600;background:#EDF0F3;color:var(--ink-2);white-space:nowrap}
.chip.open{background:var(--open-tint);color:#14603F}
.chip.closed{background:var(--lock-tint);color:#8F2717}
.chip.wait{background:var(--warn-tint);color:#6B5000}
.chip.blue{background:var(--blue-tint);color:var(--blue)}
.dot{width:8px;height:8px;border-radius:50%;background:currentColor}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-bottom:24px}
.stat{padding:12px 16px;background:var(--surface);border:1px solid var(--line);border-radius:10px}
.stat b{display:block;font-size:1.6rem;letter-spacing:-.02em;line-height:1.1}
.stat span{font-size:.85rem;color:var(--ink-2)}
section + section{margin-top:32px}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:12px;flex-wrap:wrap}

/* ---------- tables ---------- */
.table-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--line);border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:.95rem}
th,td{padding:10px 14px;text-align:left;border-top:1px solid var(--line);vertical-align:middle}
thead th{border-top:0;background:#F8FAFB;font-size:.85rem;color:var(--ink-2);font-weight:600}
tbody tr:hover{background:#FAFBFC}
td.actions{white-space:nowrap;text-align:right}

/* ---------- class control bar ---------- */
.controlbar{position:sticky;top:0;z-index:5;background:var(--surface);border:1px solid var(--line-2);border-radius:10px;padding:14px 16px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.controlbar select{width:auto;min-height:40px}
.seg{display:inline-flex;align-items:center;gap:8px}
.bulk select{width:auto}
.bulk{background:var(--blue-tint);border:1px solid #C5D7E8;border-radius:10px;padding:10px 14px;margin-bottom:12px}

/* ---------- notes + cards ---------- */
.split{display:grid;grid-template-columns:270px minmax(0,1fr);gap:16px;align-items:start}
.editor-title{font-size:1.4rem;font-weight:700;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:8px 2px;min-height:auto;background:transparent;letter-spacing:-.02em}
.editor-title:focus{outline:none;border-bottom-color:var(--blue)}
.editor-body{min-height:58vh;border:0;padding:14px 2px;background:transparent;font-size:1.02rem;line-height:1.7}
.editor-body:focus{outline:none}
.paper{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px 20px 16px}
.card-edit{display:grid;grid-template-columns:32px 1fr 1fr 40px;gap:8px;align-items:start;margin-bottom:8px}
.card-edit .n{padding-top:10px;color:var(--ink-3);text-align:right;font-size:.9rem}
.flip{perspective:1000px;width:100%;max-width:640px;height:280px;margin:0 auto;cursor:pointer;border:0;background:none;padding:0}
.flip-inner{position:relative;width:100%;height:100%;transition:transform .35s;transform-style:preserve-3d}
.flip.flipped .flip-inner{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;display:flex;align-items:center;justify-content:center;padding:28px;text-align:center;font-size:1.5rem;font-weight:600;letter-spacing:-.01em;background:var(--surface);border:1px solid var(--line-2);border-radius:14px;overflow:auto}
.face.back{transform:rotateY(180deg);background:var(--blue);color:#fff;border-color:var(--blue)}
.progress{height:8px;background:#E3E8ED;border-radius:99px;overflow:hidden;max-width:640px;margin:0 auto 18px}
.progress > i{display:block;height:100%;background:var(--open);width:0;transition:width .25s}
@media (prefers-reduced-motion:reduce){.flip-inner,.progress > i{transition:none}}

/* ---------- player ---------- */
.player-bar{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.player-frame{width:100%;height:calc(100vh - 150px);min-height:420px;border:1px solid var(--line-2);border-radius:10px;background:#0E1720;display:block}
.lockscreen{display:grid;place-items:center;height:calc(100vh - 150px);min-height:340px;background:var(--surface);border:1px solid var(--line-2);border-radius:10px;text-align:center;padding:24px}

/* ---------- modal + toasts ---------- */
.overlay{position:fixed;inset:0;background:rgba(15,22,30,.55);display:grid;place-items:center;padding:16px;z-index:50}
.modal{background:var(--surface);border-radius:12px;padding:22px;width:min(560px,100%);max-height:88vh;overflow:auto;border:1px solid var(--line-2)}
.modal h2{margin-bottom:12px}
.modal .foot{display:flex;gap:10px;justify-content:flex-end;margin-top:18px;flex-wrap:wrap}
.secret{font-family:ui-monospace,Consolas,monospace;font-size:1.25rem;background:var(--paper);border:1px dashed var(--line-2);border-radius:var(--r);padding:12px 14px;text-align:center;user-select:all;word-break:break-all}
#toasts{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:8px;z-index:60}
.toast{background:var(--ink);color:#fff;padding:10px 16px;border-radius:var(--r);max-width:340px;font-size:.92rem}
.toast.bad{background:var(--lock)}

/* ---------- auth ---------- */
.auth{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);min-height:100vh}
.auth-side{background:var(--ink);color:#fff;padding:clamp(28px,6vw,72px);display:flex;flex-direction:column;justify-content:center;gap:28px}
.auth-side h1{font-size:clamp(2rem,4.2vw,3rem);max-width:15ch}
.auth-side p{color:#B9C5D1;max-width:44ch;font-size:1.05rem}
.auth-side .mini{background:var(--surface);color:var(--ink);border-radius:14px 6px 6px 14px;display:grid;grid-template-columns:1fr 84px;overflow:hidden;max-width:400px;border:1px solid #fff}
.auth-side .mini div:first-child{padding:14px 18px}
.auth-side .mini b{display:block;font-size:1.15rem;color:var(--open)}
.auth-side .mini div:last-child{background:var(--pass);display:grid;place-items:center;color:var(--pass-ink);border-left:3px dotted rgba(23,33,43,.55)}
.auth-side .mini svg{width:30px;height:30px}
.auth-form{display:flex;flex-direction:column;justify-content:center;padding:clamp(24px,6vw,72px);max-width:520px;gap:16px}
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:6px}
.tabs a,.tabs button{padding:10px 14px;border:0;background:none;text-decoration:none;color:var(--ink-2);font-weight:600;border-bottom:3px solid transparent;margin-bottom:-1px;cursor:pointer}
.tabs [aria-current=page]{color:var(--blue);border-bottom-color:var(--blue)}
.tabs.inner{margin-bottom:20px;flex-wrap:wrap}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .shell{grid-template-columns:1fr}
  .rail{position:static;height:auto;flex-direction:row;align-items:center;flex-wrap:wrap;padding:10px 12px;gap:6px}
  .brand{padding:0 8px 0 0;order:1}
  .rail-foot{order:2;margin-left:auto}
  .nav{order:3;flex-direction:row;flex-wrap:wrap;flex:none;width:100%;gap:2px}
  .nav a{padding:10px 12px;font-size:.9rem;min-height:44px}
  .nav a span{display:none}
  .nav .sep{display:none}
  .rail-foot{margin-top:0;border:0;padding:0;display:flex;gap:8px;align-items:center}
  .rail-foot .role,.rail-foot .who{display:none}
  main{padding-top:20px}
  .split{grid-template-columns:1fr}
  .auth{grid-template-columns:1fr}
  .auth-side{padding:28px 24px;gap:18px}
  .pass{grid-template-columns:1fr 96px}
  .pass-main{padding:16px 18px}.pass-main h2{font-size:1.4rem}
  .card-edit{grid-template-columns:1fr 1fr 40px}.card-edit .n{display:none}
  .player-frame{height:calc(100vh - 190px)}
}
@media (max-width:520px){ .nav a span{display:none} h1{font-size:1.5rem} }