:root{
  --blue:#2563eb;--blue-d:#1d4ed8;--navy:#0f1d40;--ink:#111827;--mut:#6b7280;--line:#e5e7eb;
  --soft:#eef4ff;--soft2:#e1eafe;--r:18px;
  --sh:0 1px 2px rgba(15,29,64,.04),0 8px 28px rgba(15,29,64,.07);
  --sh-h:0 2px 4px rgba(37,99,235,.08),0 18px 44px rgba(37,99,235,.18);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);min-height:100vh;
  background:
   radial-gradient(900px 420px at 92% -6%,#cfe0ff 0,transparent 62%),
   radial-gradient(800px 460px at 4% -10%,#dfe9ff 0,transparent 60%),
   #f5f7fc;background-attachment:fixed}
a{color:var(--blue)}
::selection{background:#bfd4ff}

/* ===== hlavička ===== */
.top{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.78);backdrop-filter:blur(12px);border-bottom:1px solid rgba(229,231,235,.8)}
.top-in{max-width:1100px;margin:0 auto;padding:14px 24px;display:flex;justify-content:space-between;align-items:center}
.brand{font-weight:800;letter-spacing:.4px;text-decoration:none;color:var(--ink);font-size:20px;display:flex;align-items:center}
.brand b{display:inline-grid;place-items:center;width:34px;height:34px;margin-right:9px;border-radius:11px;color:#fff;font-size:18px;
  background:linear-gradient(135deg,#60a5fa,#2563eb 60%,#1e40af);box-shadow:0 4px 12px rgba(37,99,235,.35)}
.brand small{font-weight:600;font-size:14px;color:var(--mut);margin-left:6px}
.back{text-decoration:none;color:#374151;font-size:14px;font-weight:600;padding:8px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);transition:.15s}
.back:hover{border-color:#bfd0f5;color:var(--blue);transform:translateX(2px)}
.wrap{max-width:1100px;margin:0 auto;padding:40px 24px 20px;animation:rise .45s ease both}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.narrow{max-width:560px;margin:0 auto}
h1{font-size:clamp(28px,5vw,40px);margin:0 0 8px;text-align:center;letter-spacing:-.8px;color:var(--navy);line-height:1.1}
.lead{color:var(--mut);text-align:center;margin:0 0 30px;font-size:16px}

/* ===== úvod ===== */
.hero{text-align:center;margin:26px 0 34px}
.eyebrow{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1.4px;color:var(--blue);background:#fff;border:1px solid var(--soft2);padding:6px 14px;border-radius:999px;box-shadow:0 2px 8px rgba(37,99,235,.08)}
.hero h1{margin-top:18px;font-size:clamp(34px,6vw,54px)}
.live{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--mut);background:#fff;border:1px solid var(--line);padding:7px 14px;border-radius:999px}
.live i{width:9px;height:9px;border-radius:50%;background:#cbd5e1}
.live.on{color:#166534;border-color:#bbf7d0;background:#f0fdf4}
.live.on i{background:#22c55e;box-shadow:0 0 0 0 rgba(34,197,94,.6);animation:ping 1.6s infinite}
@keyframes ping{70%{box-shadow:0 0 0 9px rgba(34,197,94,0)}100%{box-shadow:0 0 0 0 rgba(34,197,94,0)}}
.choose{max-width:900px;margin:0 auto}

/* ===== karty ===== */
.card{background:#fff;border-radius:var(--r);padding:28px;box-shadow:var(--sh);border:1px solid #eef0f6;margin-bottom:20px;transition:box-shadow .25s,transform .25s,border-color .25s}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.grid>.card{margin-bottom:0}
a.tile{display:block;text-decoration:none;color:inherit;position:relative;overflow:hidden;padding:34px 30px}
a.tile::after{content:"";position:absolute;right:-60px;top:-60px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(96,165,250,.22),transparent 70%);transition:transform .4s}
a.tile .ico{width:60px;height:60px;border-radius:18px;display:grid;place-items:center;color:#fff;margin-bottom:20px;
  background:linear-gradient(135deg,#60a5fa,#2563eb);box-shadow:0 10px 22px rgba(37,99,235,.35);transition:transform .3s}
a.tile.alt .ico{background:linear-gradient(135deg,#38bdf8,#0ea5e9 55%,#0369a1);box-shadow:0 10px 22px rgba(14,165,233,.35)}
a.tile .ico svg{width:30px;height:30px}
a.tile h2{margin:0 0 6px;font-size:22px;color:var(--navy);letter-spacing:-.3px}
a.tile p{margin:0 0 18px;color:var(--mut);font-size:15px}
a.tile span{color:var(--blue);font-weight:700;font-size:14px;display:inline-block;transition:transform .2s}
a.tile:hover{box-shadow:var(--sh-h);transform:translateY(-5px);border-color:#bfd4ff}
a.tile:hover::after{transform:scale(1.5)}
a.tile:hover .ico{transform:rotate(-6deg) scale(1.08)}
a.tile:hover span{transform:translateX(5px)}

/* ===== formuláre ===== */
label{display:block;font-weight:600;font-size:14px;margin:16px 0 6px;color:#1f2a44}
input[type=text],input[type=password],input[type=number],select,textarea,input[type=file]{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;font-size:15px;background:#fbfcff;font-family:inherit;color:var(--ink);transition:border-color .15s,box-shadow .15s,background .15s}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(37,99,235,.14)}
input[type=file]{padding:10px;border-style:dashed;background:var(--soft);cursor:pointer}
input[type=file]::file-selector-button{border:0;background:var(--blue);color:#fff;padding:8px 14px;border-radius:9px;font-weight:600;margin-right:12px;cursor:pointer;font-family:inherit}
input[type=file]::file-selector-button:hover{background:var(--blue-d)}
input[type=checkbox]{width:17px;height:17px;accent-color:var(--blue)}

/* ===== tlačidlá ===== */
.btn{display:inline-block;background:linear-gradient(180deg,#3b82f6,#2563eb);color:#fff;border:0;padding:10px 17px;border-radius:12px;font-weight:600;font-size:14px;cursor:pointer;text-decoration:none;font-family:inherit;
  box-shadow:0 1px 2px rgba(37,99,235,.3),0 4px 12px rgba(37,99,235,.22);transition:transform .12s,box-shadow .15s,filter .15s}
.btn:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 2px 4px rgba(37,99,235,.3),0 8px 18px rgba(37,99,235,.28)}
.btn:active{transform:scale(.97)}
.btn.full{width:100%;margin-top:22px;padding:15px;font-size:16px;border-radius:14px}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{border-color:#bfd0f5;color:var(--blue);filter:none;box-shadow:0 4px 12px rgba(15,29,64,.07)}
.btn.warn{background:#fff7ed;color:#9a3412;border:1px solid #fed7aa;box-shadow:none}
.btn.danger{background:#fef2f2;color:#b91c1c;border:1px solid #fecaca;box-shadow:none}
.btn.danger:hover{background:#fee2e2;filter:none}
.btn.green{background:#15803d}.btn.yellow{background:#f0b429;color:#111}

/* ===== hlášky, štítky ===== */
.msg{padding:13px 16px;border-radius:12px;margin-bottom:16px;font-size:14px;font-weight:500;border:1px solid transparent;animation:rise .3s ease}
.msg.ok{background:#f0fdf4;color:#166534;border-color:#bbf7d0}.msg.err{background:#fef2f2;color:#991b1b;border-color:#fecaca}
.hint{color:var(--mut);font-size:12.5px;margin-top:10px}
.pill{display:inline-block;padding:4px 11px;border-radius:999px;font-size:12px;font-weight:700;background:#eef0f4;color:#4b5563}
.pill.pub,.pill.open{background:#dcfce7;color:#166534}
.pill.info{background:var(--soft);color:var(--blue)}
.empty{text-align:center;color:var(--mut);padding:30px 10px}
.empty-ico{font-size:40px;margin-bottom:8px;filter:grayscale(.1)}

/* ===== tabuľky ===== */
table{width:100%;border-collapse:collapse}
th{text-align:left;font-size:11.5px;text-transform:uppercase;letter-spacing:.8px;color:#8a94a8;padding:12px 10px;border-bottom:1px solid var(--line)}
td{padding:13px 10px;border-bottom:1px solid #f1f3f8;font-size:14px;vertical-align:middle}
tbody tr{transition:background .15s}tbody tr:hover{background:#f6f9ff}
tr:last-child td{border-bottom:0}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:end}
.row>div{flex:1;min-width:160px}
.big-count{font-size:40px;font-weight:800;color:var(--blue);letter-spacing:-1px;line-height:1.1}
.grid>.card .big-count+.hint{margin-top:2px}

/* ===== súbory ===== */
.list-head{display:flex;justify-content:space-between;align-items:center;color:var(--mut);font-weight:600;margin-bottom:16px}
.file{display:flex;align-items:center;gap:14px;border:1px solid #eef0f6;background:#fafbff;border-radius:14px;padding:13px 16px;margin-bottom:10px;transition:.2s}
.file:hover{background:#fff;border-color:#c9daff;box-shadow:0 8px 22px rgba(37,99,235,.1);transform:translateY(-2px)}
.fmeta{flex:1;min-width:0}
.fmeta b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file small{color:var(--mut);display:block;margin-top:2px}
.fname{display:flex;align-items:center;gap:12px}
.ficon{flex:none;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;font-size:11px;font-weight:800;letter-spacing:.3px;color:#fff;background:#94a3b8;box-shadow:inset 0 -3px 0 rgba(0,0,0,.12)}
.ficon.red{background:#ef4444}.ficon.blue{background:#3b82f6}.ficon.green{background:#16a34a}.ficon.orange{background:#f97316}
.ficon.purple{background:#8b5cf6}.ficon.pink{background:#ec4899}.ficon.gray{background:#94a3b8}
.fname .ficon{width:36px;height:36px;border-radius:10px;font-size:9.5px}
form.inline{display:inline}

/* ===== päta ===== */
.foot{text-align:center;color:#9ca3af;font-size:12px;padding:30px}

/* ===== časovač ===== */
.tm-bar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between;margin-bottom:18px}
.tm-bar select{width:auto;min-width:240px}
.seg{display:inline-flex;background:var(--soft2);border-radius:14px;padding:4px}
.seg button{border:0;background:transparent;padding:10px 18px;border-radius:11px;font-weight:600;color:#3b5bdb;cursor:pointer;font-size:14px;font-family:inherit;transition:.2s}
.seg button.on{background:#fff;color:var(--blue-d);box-shadow:0 2px 8px rgba(37,99,235,.25)}
.tm-card{text-align:center;padding:40px 20px 34px;background:radial-gradient(500px 300px at 50% 0,#eaf2ff,transparent 70%),linear-gradient(180deg,#fff,#f7faff)}
.ring{position:relative;width:min(360px,78vw);aspect-ratio:1;margin:0 auto}
.ring::before{content:"";position:absolute;inset:-10px;border-radius:50%;background:radial-gradient(circle,rgba(37,99,235,.14),transparent 68%);z-index:0}
.ring svg{position:relative;width:100%;height:100%;transform:rotate(-90deg)}
.ring .track{fill:none;stroke:var(--soft2);stroke-width:11}
.ring .prog{fill:none;stroke:var(--blue);stroke-width:11;stroke-linecap:round;stroke-dasharray:552.92;stroke-dashoffset:0;transition:stroke-dashoffset .35s linear,stroke .4s;filter:drop-shadow(0 0 6px rgba(37,99,235,.45))}
.ring-in{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.digits{font-size:clamp(46px,11vw,84px);font-weight:800;color:var(--navy);font-variant-numeric:tabular-nums;letter-spacing:-2px;line-height:1}
.st-label{color:#5b6b8c;font-weight:600;margin-top:12px;font-size:15px}
.tm-card.warn .prog{stroke:#ef4444;filter:drop-shadow(0 0 7px rgba(239,68,68,.55));animation:pulse 1s ease-in-out infinite}
.tm-card.warn .digits{color:#dc2626}
.tm-card.done .prog{stroke-dashoffset:552.92}
.tm-card.done .digits{color:#64748b}
@keyframes pulse{50%{opacity:.45}}
.end-info{display:inline-block;margin-top:22px;background:var(--soft);color:var(--blue-d);padding:8px 18px;border-radius:999px;font-weight:600;font-size:14px;border:1px solid var(--soft2)}
.tm-ctl{margin-top:24px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap;align-items:center}
.tm-ctl input[type=number]{width:90px;text-align:center}
[data-mode=session] .only-custom{display:none}
[data-mode=custom] .only-session{display:none}

/* odovzdali */
.pbar{height:16px;background:var(--soft2);border-radius:99px;overflow:hidden}
.pbar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,#60a5fa,#2563eb);border-radius:99px;transition:width .6s cubic-bezier(.3,.8,.3,1);box-shadow:0 0 12px rgba(37,99,235,.4)}
.sub-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.sub-head h2{margin:0;font-size:21px;color:var(--navy)}
.tot{display:flex;align-items:center;gap:8px;font-size:14px;color:#5b6b8c}.tot input{width:80px;padding:8px}
.cnt-big{font-size:48px;font-weight:800;color:var(--blue);line-height:1;letter-spacing:-1.5px}.cnt-big small{font-size:22px;color:#8aa0cc;font-weight:700;letter-spacing:0}
.who-search{max-width:220px;padding:9px 14px;border-radius:999px}
ol.recent{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:10px;max-height:520px;overflow:auto;padding:4px}
ol.recent li{display:flex;align-items:center;gap:11px;padding:10px 14px 10px 10px;border-radius:14px;background:#f5f9ff;border:1px solid #e6eefc;font-size:14.5px;transition:.2s}
ol.recent li:hover{background:#fff;border-color:#bfd4ff;box-shadow:0 4px 14px rgba(37,99,235,.1)}
ol.recent li.new{animation:flash 2.2s ease}
@keyframes flash{0%{background:#bbf7d0;transform:scale(1.03)}100%{background:#f5f9ff;transform:none}}
ol.recent em{font-style:normal;font-size:11px;font-weight:700;color:#8aa0cc;min-width:18px;text-align:right}
ol.recent .av{flex:none;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;font-style:normal;font-size:13px;font-weight:700;color:#fff;background:linear-gradient(135deg,#60a5fa,#2563eb)}
ol.recent b{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
ol.recent li span{font-size:12.5px;font-weight:700;color:#15803d;background:#dcfce7;padding:3px 9px;border-radius:999px}

@media (max-width:600px){
  .wrap{padding:26px 16px 10px}.top-in{padding:12px 16px}.card{padding:20px}
  .file{flex-wrap:wrap}.file .btn{width:100%;text-align:center}
  th:nth-child(n+3),td:nth-child(n+3){white-space:nowrap}
  .card{overflow-x:auto}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.center{text-align:center}
.digits.long{font-size:clamp(34px,8vw,58px);letter-spacing:-1px}

/* ===== rozloženie: vľavo časovač, vpravo odovzdania ===== */
.tm-layout{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(300px,1fr);gap:20px;align-items:stretch}
.tm-layout>.card{margin:0}
.tm-layout .tm-card{display:flex;flex-direction:column;justify-content:center}
.side{display:flex;flex-direction:column;min-height:0}
.side-stat{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:12px}
.pct-big{font-size:34px;font-weight:800;color:var(--navy);letter-spacing:-1px;line-height:1}
.side .pbar{height:22px}
.side-list-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:22px 0 12px}
.side-list-head h3{margin:0;font-size:17px;color:var(--navy)}
.side ol.recent{grid-template-columns:1fr;flex:1;max-height:560px;min-height:120px}
.tm-layout:fullscreen{padding:28px;background:radial-gradient(900px 600px at 30% 30%,#eaf2ff,#f7faff 70%);gap:28px;height:100vh;overflow:hidden}
.tm-layout:fullscreen .tm-card{border-radius:24px}
.tm-layout:fullscreen .ring{width:min(66vh,40vw)}
.tm-layout:fullscreen .digits{font-size:clamp(50px,9vh,130px)}
.tm-layout:fullscreen .digits.long{font-size:clamp(40px,7vh,100px)}
.tm-layout:fullscreen .side{border-radius:24px;padding:30px;overflow:hidden}
.tm-layout:fullscreen .side ol.recent{max-height:none;overflow:auto}
.tm-layout:fullscreen .cnt-big{font-size:clamp(48px,9vh,96px)}
.tm-layout:fullscreen .pct-big{font-size:clamp(40px,7vh,80px)}
.tm-layout:fullscreen .side .pbar{height:clamp(24px,4vh,44px)}
.tm-layout:fullscreen ol.recent li{font-size:clamp(15px,2.4vh,24px);padding:12px 16px}
.tm-layout:fullscreen .tm-ctl,.tm-layout:fullscreen .tot,.tm-layout:fullscreen .who-search{display:none}
@media (max-width:860px){.tm-layout{grid-template-columns:1fr}.tm-layout:fullscreen{overflow:auto;height:auto}}
.tm-layout .end-info{align-self:center}

/* pokyn nad barom */
.side .notice{width:100%;margin-bottom:16px;padding:13px 16px;border-radius:14px;border:1.5px dashed #9db8f5;background:#f3f7ff;font-weight:600;color:var(--navy);text-align:center}
.side .notice:not(:placeholder-shown){border-style:solid;border-color:#2563eb;background:#eaf2ff;color:#1d4ed8}
.tm-layout:fullscreen .side .notice{font-size:clamp(15px,2.5vh,30px);padding:clamp(12px,2vh,24px);margin-bottom:clamp(14px,3vh,30px)}
.tm-layout:fullscreen .side .notice:placeholder-shown{border-color:transparent;background:transparent;color:transparent}
.tm-layout:fullscreen .side .notice:placeholder-shown::placeholder{color:#b6c4e4;font-size:.5em}