:root {
  --bg:#07070E; --bg-2:#0C0C16;
  --surface:rgba(255,255,255,0.035); --surface-2:rgba(255,255,255,0.06);
  --border:rgba(255,255,255,0.08); --text:#ECECF4;
  --dim:rgba(255,255,255,0.5); --faint:rgba(255,255,255,0.2);
  --green:#63FFB6; --blue:#4FC3F7; --purple:#B388FF; --orange:#FF8A65; --yellow:#FFD54F; --pink:#FF80AB; --red:#FF6E6E;
}
* { box-sizing:border-box; margin:0; padding:0; -webkit-tap-highlight-color:transparent; }
html { color-scheme:dark; }
body { font-family:'Outfit','Segoe UI',system-ui,sans-serif; background:var(--bg); color:var(--text); min-height:100vh; line-height:1.45; }
.bg-glow { position:fixed; inset:0; z-index:-1; pointer-events:none;
  background: radial-gradient(60% 50% at 78% 0%, rgba(179,136,255,0.12) 0%, transparent 60%),
              radial-gradient(55% 45% at 10% 15%, rgba(99,255,182,0.10) 0%, transparent 60%),
              radial-gradient(70% 60% at 50% 110%, rgba(79,195,247,0.10) 0%, transparent 60%), var(--bg); }
.wrap { max-width:820px; margin:0 auto; padding:18px 14px 80px; }
.wrap.wide { max-width:1200px; }
header.top { display:flex; align-items:center; gap:10px; padding:8px 2px 14px; flex-wrap:wrap; }
header.top h1 { font-family:'JetBrains Mono',ui-monospace,monospace; font-size:16px; font-weight:700; letter-spacing:1px; }
header.top h1 a { color:var(--dim); text-decoration:none; }
header.top .who { margin-left:auto; font-size:12px; color:var(--dim); display:flex; gap:10px; align-items:center; }
.mono { font-family:'JetBrains Mono',ui-monospace,monospace; }
.dim { color:var(--dim); } .small { font-size:12px; } .faint { color:var(--faint); }
.right { text-align:right; } .center { text-align:center; }
.row { display:flex; gap:10px; align-items:center; flex-wrap:wrap; }
.grow { flex:1; }
.mt { margin-top:14px; } .mb { margin-bottom:14px; }

nav.tabs { display:flex; gap:6px; overflow-x:auto; padding-bottom:10px; scrollbar-width:none; }
nav.tabs::-webkit-scrollbar{display:none}
.tab { font-family:'JetBrains Mono',monospace; font-size:12px; font-weight:600; letter-spacing:.5px;
  padding:8px 13px; border-radius:999px; border:1px solid var(--border); background:var(--surface);
  color:var(--dim); cursor:pointer; white-space:nowrap; transition:.2s; }
.tab.active { color:#0A0A12; background:linear-gradient(120deg,var(--green),var(--blue)); border-color:transparent; }

.card { background:linear-gradient(160deg,var(--surface-2),var(--surface)); border:1px solid var(--border);
  border-radius:18px; padding:18px; margin-bottom:14px; }
.card h2 { font-size:15px; font-weight:700; margin-bottom:12px; display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
.card h2 .chip { margin-left:auto; }
.card h3 { font-size:14px; font-weight:700; margin:12px 0 8px; }
.chip { font-family:'JetBrains Mono',monospace; font-size:11px; padding:2px 9px; border-radius:999px;
  background:var(--surface-2); border:1px solid var(--border); color:var(--dim); white-space:nowrap; }
.chip.ok { color:var(--green); border-color:rgba(99,255,182,.4); }
.chip.warn { color:var(--orange); border-color:rgba(255,138,101,.4); }
.chip.bad { color:var(--red); border-color:rgba(255,110,110,.4); }
.chip.info { color:var(--blue); border-color:rgba(79,195,247,.4); }
.btn { font-family:inherit; font-size:14px; font-weight:600; padding:11px 18px; border-radius:12px;
  border:1px solid var(--border); background:var(--surface-2); color:var(--text); cursor:pointer; transition:.2s; }
.btn:hover { border-color:rgba(255,255,255,0.25); }
.btn.primary { background:linear-gradient(120deg,var(--green),var(--blue)); color:#0A0A12; border:none; }
.btn.warn { background:linear-gradient(120deg,var(--orange),var(--pink)); color:#0A0A12; border:none; }
.btn.ghost { background:transparent; }
.btn.sm { font-size:12px; padding:7px 12px; border-radius:9px; }
.btn:disabled { opacity:.4; cursor:default; }
.btnrow { display:flex; gap:10px; flex-wrap:wrap; margin-top:14px; align-items:center; }

input[type=text], input[type=password], input[type=search], select, textarea {
  font-family:'JetBrains Mono',monospace; font-size:14px; color:var(--text); width:100%;
  background:var(--bg-2); border:1px solid var(--border); border-radius:10px; padding:10px 12px; color-scheme:dark; }
input:focus, textarea:focus, select:focus { outline:none; border-color:var(--blue); }
textarea { min-height:90px; resize:vertical; font-family:inherit; }
label.lbl { display:block; font-size:12px; color:var(--dim); margin:8px 0 4px; }
.err { color:var(--red); font-size:13px; margin-top:8px; }
.note { color:var(--dim); font-size:13px; line-height:1.55; }

.bigstat { display:flex; gap:12px; flex-wrap:wrap; }
.stat { flex:1 1 100px; background:var(--surface); border:1px solid var(--border); border-radius:14px; padding:14px 12px; text-align:center; }
.stat .v { font-family:'JetBrains Mono',monospace; font-size:26px; font-weight:700; }
.stat .l { font-size:11px; color:var(--dim); margin-top:4px; letter-spacing:.5px; }
.bar { height:7px; border-radius:99px; background:var(--surface-2); overflow:hidden; margin-top:6px; }
.bar > i { display:block; height:100%; border-radius:99px; background:linear-gradient(90deg,var(--green),var(--blue)); }
.bar.red > i { background:linear-gradient(90deg,var(--orange),var(--red)); }

.modrow { display:flex; align-items:center; gap:12px; padding:12px 4px; border-bottom:1px solid var(--surface-2); cursor:pointer; }
.modrow:last-child { border-bottom:none; }
.modrow .num { font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--faint); width:28px; }
.modrow .nm { flex:1; font-weight:600; font-size:14px; }
.modrow .meta { font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--dim); white-space:nowrap; text-align:right; }
.topicrow { display:flex; align-items:center; gap:10px; padding:9px 0; border-bottom:1px solid var(--surface-2); font-size:13.5px; cursor:pointer; }
.topicrow:last-child{border-bottom:none}
.topicrow .nm { flex:1; }
.topicrow .rd { font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--dim); }
.topicrow .rd.ok { color:var(--green); }

.passage { background:var(--surface); border:1px solid var(--border); border-left:3px solid var(--blue);
  border-radius:12px; padding:13px 15px; font-size:14px; line-height:1.65; margin-bottom:13px; white-space:pre-wrap; }
.qtext { font-size:16px; font-weight:600; line-height:1.5; margin-bottom:15px; }
.opts { display:flex; flex-direction:column; gap:9px; }
.opt { display:flex; gap:11px; align-items:flex-start; padding:12px 14px; border-radius:12px;
  border:1px solid var(--border); background:var(--surface); cursor:pointer; font-size:14px; line-height:1.45; transition:.15s; user-select:none; }
.opt:hover { border-color:rgba(255,255,255,0.3); }
.opt .letter { font-family:'JetBrains Mono',monospace; font-weight:700; color:var(--dim); flex:0 0 18px; }
.opt.sel { border-color:var(--blue); background:rgba(79,195,247,0.10); }
.opt.right { border-color:var(--green); background:rgba(99,255,182,0.10); }
.opt.right .letter{color:var(--green)}
.opt.wrong { border-color:var(--red); background:rgba(255,110,110,0.10); }
.opt.wrong .letter{color:var(--red)}
.opt.missed { border-color:var(--yellow); background:rgba(255,213,79,0.08); }
.expl { margin-top:14px; padding:13px 15px; border-radius:12px; border:1px solid var(--border);
  border-left:3px solid var(--green); background:var(--surface); font-size:13.5px; line-height:1.6; color:rgba(255,255,255,0.85); }
.expl.bad { border-left-color:var(--red); }
.expl .src { display:block; margin-top:6px; font-size:12px; color:var(--dim); font-family:'JetBrains Mono',monospace; }
.qmeta { display:flex; gap:8px; align-items:center; margin-bottom:12px; flex-wrap:wrap; }
.progress-line { font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--dim); }

.qgrid { display:flex; flex-wrap:wrap; gap:6px; margin-top:12px; }
.qcell { width:34px; height:34px; border-radius:9px; border:1px solid var(--border); background:var(--surface);
  font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--dim); cursor:pointer; display:grid; place-items:center; position:relative; }
.qcell.answered { border-color:var(--blue); color:var(--blue); }
.qcell.cur { background:linear-gradient(120deg,var(--green),var(--blue)); color:#0A0A12; border:none; font-weight:700; }
.qcell.marked::after { content:""; position:absolute; top:3px; right:3px; width:6px; height:6px; border-radius:50%; background:var(--yellow); }
.qcell.r { border-color:var(--green); color:var(--green); }
.qcell.w { border-color:var(--red); color:var(--red); }
.timer { font-family:'JetBrains Mono',monospace; font-size:22px; font-weight:700; color:var(--green); }
.timer.low { color:var(--red); animation:blink 1s infinite; }
@keyframes blink { 50%{opacity:.4} }
.exambar { position:sticky; top:0; z-index:5; background:rgba(7,7,14,.92); backdrop-filter:blur(8px); padding:10px 0; margin-bottom:10px; display:flex; align-items:center; gap:12px; border-bottom:1px solid var(--border); }
.saveind { font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--faint); }
.saveind.ok { color:var(--green); } .saveind.pending { color:var(--orange); } .saveind.off { color:var(--red); }

.theory-body { font-size:14.5px; line-height:1.7; color:rgba(255,255,255,0.88); }
.theory-body p { margin-bottom:10px; }
.theory-body h4 { font-size:14px; margin:16px 0 8px; color:var(--text); }
.theory-body ul, .theory-body ol { margin:0 0 10px 20px; }
.theory-body li { margin-bottom:5px; }
.theory-body b { color:var(--text); }
.theory-body a { color:var(--blue); }
.theory-body code { font-family:'JetBrains Mono',monospace; font-size:12.5px; background:var(--surface-2); padding:1px 5px; border-radius:5px; }
.theory-body table { border-collapse:collapse; margin:10px 0; font-size:13px; width:100%; display:block; overflow-x:auto; }
.theory-body th, .theory-body td { border:1px solid var(--border); padding:6px 9px; text-align:left; vertical-align:top; }
.theory-body th { background:var(--surface-2); }

table.tbl { width:100%; border-collapse:collapse; font-size:13px; }
table.tbl th, table.tbl td { padding:8px 8px; border-bottom:1px solid var(--surface-2); text-align:left; vertical-align:top; }
table.tbl th { font-size:11px; color:var(--dim); font-family:'JetBrains Mono',monospace; font-weight:600; letter-spacing:.5px; white-space:nowrap; }
table.tbl tr.clickable:hover { background:var(--surface); cursor:pointer; }
.tblwrap { overflow-x:auto; }
.footer-note { text-align:center; padding:26px 0 10px; font-size:11px; color:var(--faint); font-family:'JetBrains Mono',monospace; letter-spacing:2px; }
.login-box { max-width:420px; margin:60px auto; }
.login-box h2 { justify-content:center; }
.code-input { font-size:20px !important; letter-spacing:3px; text-align:center; text-transform:uppercase; }
.clickable { cursor:pointer; }
.toast { position:fixed; bottom:20px; left:50%; transform:translateX(-50%); background:var(--bg-2); border:1px solid var(--border); border-radius:12px; padding:10px 16px; font-size:13px; z-index:50; }
@media (max-width:520px){ .stat .v{font-size:21px} .qcell{width:31px;height:31px} .wrap{padding:12px 10px 60px} }