/* Shared styles, modeled on the matematika-kolokvijum app */
/* Dark theme modeled on the podmreze study site */
:root{--bg:#000;--card:#0d0d0d;--ink:#ececec;--mut:#9a9a9a;--acc:#8ec5ff;--acc2:#11202f;--ok:#7ee0a4;--okbg:#0f2a1b;--bad:#ff8a8a;--badbg:#2e1212;--line:#262626;--code:#050505;--codeink:#e6edf3}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 "Instrument Sans",system-ui,sans-serif}
header.top{background:rgba(0,0,0,.92);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;backdrop-filter:blur(8px)}
.top .in{max-width:980px;margin:0 auto;padding:12px 18px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.top .brand{font-weight:700;margin-right:auto}.top .brand span{display:none}
.top nav{display:flex;gap:4px;overflow-x:auto}
.top nav a{color:var(--mut);text-decoration:none;padding:8px 15px;border-radius:999px;white-space:nowrap}
.top nav a:hover{color:var(--ink)}
.top nav a.on{background:#ececec;color:#000}
main{max-width:980px;margin:0 auto;padding:28px 18px 60px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin:14px 0}
h1{font-size:clamp(1.9rem,5vw,2.9rem);line-height:1.1;margin:.2em 0 .3em;letter-spacing:-.02em}h2{font-size:20px;margin:22px 0 8px;color:var(--acc)}h3{font-size:17px;margin:16px 0 6px}
.mut{color:var(--mut)}
code{background:var(--acc2);color:var(--acc);padding:1px 5px;border-radius:4px;font:14px "JetBrains Mono",ui-monospace,Menlo,Consolas,monospace}
pre{border:1px solid var(--line);background:var(--code);color:var(--codeink);padding:12px 14px;border-radius:8px;overflow-x:auto;font:13.5px/1.5 ui-monospace,Menlo,Consolas,monospace;margin:8px 0}
.btn{border:1px solid var(--line);background:#141414;color:var(--ink);border-radius:8px;padding:7px 13px;font:inherit;font-size:14px;cursor:pointer}
.btn.pri{background:#ececec;color:#000;border-color:#ececec}.btn:hover{filter:brightness(.95)}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.chip{border:1px solid var(--line);background:#0d0d0d;color:var(--mut);border-radius:999px;padding:5px 12px;cursor:pointer;font-size:14px}
.chip.on{background:#ececec;border-color:#ececec;color:#000}
iframe.prev{width:100%;min-height:220px;border:1px solid var(--line);border-radius:8px;background:#fff}
.lbl{font-size:12px;text-transform:uppercase;letter-spacing:.05em;color:var(--mut);margin:10px 0 4px}
.toc{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}
.toc a{display:block;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px 14px;text-decoration:none;color:inherit}
.toc a b{display:block;color:var(--ink)}.toc a i{display:block;font:normal 13px "JetBrains Mono",monospace;color:var(--acc)}.toc a span{color:var(--mut);font-size:15px}.toc a:hover{border-color:var(--acc)}
table.t{border-collapse:collapse;margin:8px 0;font-size:14.5px}table.t td,table.t th{border:1px solid var(--line);padding:5px 9px;text-align:left}table.t th{background:#161616}
/* quiz */
.q .opts{display:grid;gap:8px;margin-top:10px}
.q .opt{text-align:left;border:1px solid var(--line);background:#111;color:var(--ink);border-radius:8px;padding:10px 12px;font:inherit;cursor:pointer}
.q .opt:hover{border-color:var(--acc)}
.q .opt.ok{background:var(--okbg);border-color:var(--ok)}.q .opt.bad{background:var(--badbg);border-color:var(--bad)}
.q .exp{margin-top:10px;padding:10px 12px;border-left:4px solid var(--acc);background:var(--acc2);border-radius:6px}
.tag{font-size:12px;background:var(--acc2);color:var(--acc);border-radius:999px;padding:2px 9px}
.score{font-weight:700}
/* tasks */
.ed{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:820px){.ed{grid-template-columns:1fr}}
textarea.code{display:block;width:100%;height:300px;min-height:200px;resize:vertical;background:var(--code);color:var(--codeink);border:1px solid var(--line);border-radius:8px;padding:12px;font:13.5px/1.5 ui-monospace,Menlo,Consolas,monospace;tab-size:2}
.ed iframe{height:300px;min-height:0;display:block}
.ed>div{min-width:0}
.hint{background:#1f1808;border-left:4px solid #ffb86b;padding:8px 12px;border-radius:6px;margin-top:8px}
.lead{color:var(--mut);max-width:680px}
h2{color:var(--ink)}
.lnum{font:13px "JetBrains Mono",monospace;color:var(--acc)}
/* Level colors, as on the podmreze site */
.lv-lako{color:#7ee0a4}.lv-srednje{color:#ffb86b}.lv-tesko{color:#ff8a8a}
.chip.lv-lako.on{background:#7ee0a4;border-color:#7ee0a4;color:#000}
.chip.lv-srednje.on{background:#ffb86b;border-color:#ffb86b;color:#000}
.chip.lv-tesko.on{background:#ff8a8a;border-color:#ff8a8a;color:#000}
.tag.lvt-lako{background:#0f2a1b;color:#7ee0a4}.tag.lvt-srednje{background:#2b1d08;color:#ffb86b}.tag.lvt-tesko{background:#2e1212;color:#ff8a8a}
.hint ol{margin:6px 0 0;padding-left:22px}.hint li{margin:4px 0}
.chips#lvl .chip{font-weight:600}
.chip.big{font-size:16px;padding:8px 18px;font-weight:600}
/* Small task buttons under the editor */
.acts{margin-top:12px;gap:6px}
.acts .btn{font-size:12.5px;padding:5px 10px;border-radius:7px}
/* Questions page: kind cards, dropdown, progress */
.kinds{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0}
@media (max-width:640px){.kinds{grid-template-columns:1fr}}
.kind{position:relative;text-align:left;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px;color:var(--ink);font:inherit;cursor:pointer}
.kind:hover,.kind.on{border-color:#ececec}
.kind b{display:block;font-size:22px}.kind span{display:block;color:var(--mut);font-size:14px;margin:4px 30px 8px 0}
.kind em{font-style:normal;font:13px "JetBrains Mono",monospace;color:var(--acc)}
.kind .chev{position:absolute;right:16px;top:18px;font-style:normal;color:var(--mut)}
select{width:100%;background:#111;color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:10px 12px;font:inherit}
.prog{display:flex;align-items:center;gap:10px;margin-top:10px;font-size:14px;color:var(--mut)}
.bar{flex:1;height:8px;background:#1c1c1c;border-radius:99px;overflow:hidden}.bar i{display:block;height:100%;background:var(--ok);width:0}
/* Test page */
.timerbar{position:sticky;top:64px;z-index:5;display:flex;align-items:center;gap:14px}
.clock{font:700 28px "JetBrains Mono",monospace}.clock.low{color:var(--bad)}
.q .opt.sel{border-color:var(--acc);background:var(--acc2)}
.q div.opt{cursor:default}
.result{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.result .big{font:700 40px "JetBrains Mono",monospace}.big.pass{color:var(--ok)}.big.fail{color:var(--bad)}
.r-bad{border-color:#4a1d1d}
/* Tasks page: level cards and done marks */
.kinds.three{grid-template-columns:repeat(3,1fr)}
@media (max-width:760px){.kinds.three{grid-template-columns:1fr}}
.kind.lvk-lako b{color:#7ee0a4}.kind.lvk-srednje b{color:#ffb86b}.kind.lvk-tesko b{color:#ff8a8a}
.kind.lvk-lako.on{border-color:#7ee0a4}.kind.lvk-srednje.on{border-color:#ffb86b}.kind.lvk-tesko.on{border-color:#ff8a8a}
.done-btn.on{background:#0f2a1b;border-color:#7ee0a4;color:#7ee0a4}
.card.z-done{border-color:#1f4a31}