:root{
  --bg:#f6f8fc; --ink:#1f2a44; --muted:#6b7690; --brand:#5b6ef5; --brand-d:#4553d6;
  --accent:#ff9f43; --ok:#2bb673; --err:#e0526a; --card:#fff; --line:#e6eaf3; --radius:14px;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:'Segoe UI',system-ui,Arial,sans-serif;line-height:1.55;
  min-height:100vh;display:flex;flex-direction:column}
a{color:var(--brand);text-decoration:none} a:hover{text-decoration:underline}

/* Kontejnery — vždy vycentrované, šířka podle zařízení.
   .wrap      = texty a formuláře (pohodlná délka řádku)
   .wrap.wide = hry, cvičení a přehledy (využijí šířku tabule / velkého monitoru) */
.wrap{width:100%;max-width:1120px;margin-inline:auto;padding-inline:clamp(14px,3vw,28px)}
.wrap.mid{max-width:min(1440px,96vw)}          /* přehledy a tabulky (admin, učitel) */
.wrap.wide{max-width:min(1560px,96vw)}         /* hry a cvičení (tabule) */
main.wrap{flex:1}
@media(min-width:1900px){.wrap{max-width:1240px}.wrap.mid{max-width:1520px}.wrap.wide{max-width:1760px}}
h1{font-size:clamp(1.5rem,1.1rem + 1.2vw,2.1rem);margin:.2em 0 .5em}
h2{font-size:clamp(1.15rem,1rem + .5vw,1.4rem)}
.muted{color:var(--muted)} .lead{font-size:1.15rem;color:#42506e}
.mt{margin-top:22px}

/* Header — klidný, čitelný, bez barevného zmatku */
.site-header{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}
/* hlavička má vlastní širší kontejner, aby se vešla na JEDEN řádek */
.site-header .wrap{max-width:min(1780px,97vw)}
.header-inner{display:flex;align-items:center;gap:clamp(10px,1.6vw,26px);height:66px;
  flex-wrap:nowrap;white-space:nowrap}
.logo{font-size:1.28rem;font-weight:800;color:var(--ink);white-space:nowrap}
.logo b{color:var(--brand)} .logo span{letter-spacing:-.4px}
.mainnav{display:flex;gap:clamp(14px,1.6vw,22px);flex:1 1 auto;min-width:0;flex-wrap:wrap}
.mainnav a{color:#4a5678;font-weight:600;font-size:.96rem;padding:6px 0;border-bottom:2px solid transparent}
.mainnav a:hover{color:var(--ink);text-decoration:none;border-bottom-color:#cfd6ee}
.mainnav a.on{color:var(--ink);border-bottom-color:var(--brand)}
.header-right{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-left:auto;min-width:0}

/* přepínač jazyka — malý segmentovaný ovladač */
.langsw{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden;font-size:.76rem;font-weight:700}
.langsw a{padding:5px 9px;color:var(--muted);background:#fff}
.langsw a:hover{text-decoration:none;background:#f2f5fd}
.langsw a.on{background:var(--brand);color:#fff}

.btn-login{padding:9px 20px}

/* uživatelské menu (details/summary — bez JS) */
.usermenu{position:relative}
.usermenu summary{list-style:none;display:flex;align-items:center;gap:9px;cursor:pointer;
  padding:5px 10px 5px 5px;border-radius:999px;border:1px solid var(--line);background:#fff}
.usermenu summary::-webkit-details-marker{display:none}
.usermenu summary:hover{background:#f7f9ff}
.avatar{width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.9rem}
.uname{font-size:.9rem;font-weight:600;color:var(--ink);max-width:150px;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap}
.caret{color:var(--muted);font-size:.7rem}
.usermenu-panel{position:absolute;right:0;top:calc(100% + 8px);min-width:220px;background:#fff;
  border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 30px #0b1a4722;padding:8px;
  display:flex;flex-direction:column;gap:2px;z-index:40}
.um-mail{font-size:.78rem;color:var(--muted);padding:6px 10px 8px;border-bottom:1px solid var(--line);
  margin-bottom:4px;overflow:hidden;text-overflow:ellipsis}
.usermenu-panel a{padding:9px 10px;border-radius:8px;color:var(--ink);font-size:.92rem;font-weight:600}
.usermenu-panel a:hover{background:#f2f5fd;text-decoration:none}
.um-logout{color:var(--err)!important}

/* sekce v horní liště jako modrá tlačítka (jen po přihlášení, dle role) */
.sectionnav{display:flex;gap:8px;flex-wrap:wrap}
.navbtn{display:inline-flex;align-items:center;gap:7px;padding:9px 15px;border-radius:10px;
  background:#eef1fb;color:var(--brand-d);font-weight:700;font-size:.9rem;white-space:nowrap;
  border:1px solid transparent;transition:.14s}
.navbtn:hover{background:#e2e7fa;text-decoration:none}
.navbtn.on{background:var(--brand);color:#fff;box-shadow:0 4px 12px #5b6ef540}
.check{font-weight:500;font-size:.9rem;display:flex;gap:8px;align-items:center;margin:10px 0}
.check input{width:auto;margin:0}
.pill{padding:7px 13px;border-radius:999px;background:#eef1fb;color:var(--brand-d);font-weight:700;font-size:.88rem}
.pill.primary{background:var(--brand);color:#fff} .pill.ghost{background:#f0f2f7;color:var(--muted)}
.pill:hover{text-decoration:none;filter:brightness(.97)}

/* Buttons */
.btn{display:inline-block;padding:10px 18px;border-radius:10px;background:#eef1fb;color:var(--brand-d);
  font-weight:700;border:none;cursor:pointer;font-size:.95rem}
.btn:hover{filter:brightness(.96);text-decoration:none}
.btn.primary{background:var(--brand);color:#fff}
.btn.tiny{padding:5px 10px;font-size:.82rem}
.btn.ghost{background:transparent;color:var(--muted)}

/* Hero */
.hero{display:flex;gap:30px;align-items:center;padding:34px 0 10px}
.hero-text{flex:1.4} .hero h1{font-size:2.4rem;line-height:1.15}
.hero-art{flex:1;font-size:4.4rem;text-align:center;filter:drop-shadow(0 6px 12px #0001)}
.cta-row{display:flex;gap:12px;margin-top:18px}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:26px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.card.link{display:block;color:var(--ink)} .card.link:hover{text-decoration:none;box-shadow:0 6px 20px #0000000d}
.card-ic{font-size:2rem} .card h3{margin:.4em 0 .2em}
.card .big{font-size:2rem;font-weight:800;color:var(--brand)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}

/* Forms */
.form label{display:block;margin:10px 0;font-weight:600;font-size:.92rem}
.form input,.form select,.form textarea{width:100%;padding:10px 12px;border:1px solid var(--line);
  border-radius:9px;font-size:1rem;font-family:inherit;background:#fff;margin-top:4px;font-weight:400}
.form.inline{display:flex;gap:12px;align-items:flex-end;flex-wrap:wrap}
.form.inline label{flex:1;margin:0} .form.inline .btn{white-space:nowrap}
.rowform{display:inline} .rowform select{padding:4px 8px;border-radius:7px}

/* Tables */
.tbl{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;margin-top:16px}
.tbl th,.tbl td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--line);font-size:.94rem}
.tbl th{background:#f0f3fb;font-size:.82rem;text-transform:uppercase;letter-spacing:.4px;color:var(--muted)}
.badge{display:inline-block;background:#eef1fb;color:var(--brand-d);border-radius:6px;
  padding:2px 8px;font-size:.78rem;font-weight:700}
/* na malých obrazovkách se široké tabulky posouvají uvnitř sebe, ne celá stránka */
@media(max-width:820px){
  .tbl{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
}

.notice{padding:12px 16px;border-radius:10px;margin:14px 0;font-weight:600}
.notice.ok{background:#e5f7ee;color:#1c7a4d} .notice.err{background:#fdeaee;color:#b3324a}
.notice.info{background:#eef2ff;color:#3a4785;border:1px solid #dbe2fb}
.crumb{color:var(--muted);font-size:.88rem} .crumb a{color:var(--muted)}
.row-between{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.prose ul,.prose ol{padding-left:22px} .prose li{margin:5px 0}
.list{list-style:none;padding:0} .list li{padding:7px 0;border-bottom:1px solid var(--line)}
.auth-box{max-width:400px;margin:40px auto}
.doc-text{white-space:pre-wrap;font-family:ui-monospace,Consolas,monospace;font-size:.82rem;
  background:#fbfcfe;border:1px solid var(--line);border-radius:10px;padding:14px;max-height:460px;overflow:auto}
/* týdenní rozvrh her */
.daygrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px}
.daycol{background:#fbfcff;border:1px solid var(--line);border-radius:12px;padding:12px;
  display:flex;flex-direction:column;gap:8px}
.dayname{font-weight:800;color:var(--brand-d);font-size:.95rem}
.dayfocus{font-size:.8rem;color:var(--muted);min-height:2.4em;line-height:1.3}
.daygame{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:9px;padding:8px 10px;color:var(--ink);font-size:.86rem;font-weight:600}
.daygame:hover{border-color:var(--brand);text-decoration:none;background:#f5f7ff}
.dg-ic{font-size:1.1rem} .dg-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.centers{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px}
.center{background:#fbfcfe;border:1px solid var(--line);border-radius:10px;padding:12px}
.center span{display:block;color:var(--muted);font-size:.88rem;margin-top:4px}
.tk-entry{padding:12px 0} .tk-entry p{margin:4px 0}
/* diagnostika — dovednostní pruhy */
.skill-list{display:flex;flex-direction:column;gap:10px}
.skill-row{display:grid;grid-template-columns:200px 1fr auto;gap:12px;align-items:center}
.skill-name{font-weight:700;font-size:.92rem}
.skill-bar{height:12px;background:#eef1f8;border-radius:999px;overflow:hidden}
.skill-bar span{display:block;height:100%;background:linear-gradient(90deg,#5b6ef5,#8a76f6);border-radius:999px}
.skill-val{font-size:.85rem;color:var(--muted);white-space:nowrap}
@media(max-width:640px){.skill-row{grid-template-columns:1fr;gap:4px}}
/* tickety */
.st-badge{display:inline-block;padding:3px 12px;border-radius:999px;font-size:.76rem;font-weight:800}
.st-open{background:#eaf1ff;color:#3552c9}
.st-in_progress{background:#fff2df;color:#b26a00}
.st-resolved{background:#e5f7ee;color:#1c7a4d}
.st-closed{background:#eef0f4;color:#6b7690}
.ticket-thread{display:flex;flex-direction:column;gap:12px}
.tk-msg{border:1px solid var(--line);border-radius:12px;padding:12px 14px;max-width:88%}
.tk-msg.from-teacher{align-self:flex-start;background:#f7f9ff}
.tk-msg.from-admin{align-self:flex-end;background:#eef7f1;border-color:#cfead9}
.tk-msg-head{font-weight:700;font-size:.86rem;display:flex;gap:8px;align-items:center;margin-bottom:5px}
.tk-msg-body{white-space:pre-wrap}
.tk-status{text-align:center;color:var(--muted);font-size:.85rem;padding:4px}
/* AI asistent chat */
.chat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;
  max-height:58vh;overflow-y:auto;display:flex;flex-direction:column;gap:16px;margin:12px 0;
  scroll-behavior:smooth}
.chat-ro{background:#fcfdff;border-style:dashed}
/* řádek = avatar + bublina; u uživatele zrcadlově zprava */
.chat-row{display:flex;gap:10px;align-items:flex-start;max-width:86%}
.chat-row.from-user{align-self:flex-end;flex-direction:row-reverse}
.chat-row.from-ai{align-self:flex-start}
.chat-ava{flex:0 0 auto;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;
  font-size:1rem;background:#eef1fb;border:1px solid var(--line);user-select:none}
.chat-row.from-user .chat-ava{background:#e3e7ff;border-color:#ccd4fb}
.chat-msg{min-width:0;padding:10px 14px;border-radius:14px}
.chat-row.from-user .chat-msg{background:var(--brand);color:#fff;border-top-right-radius:5px}
.chat-row.from-ai .chat-msg{background:#f5f7fe;border:1px solid var(--line);border-top-left-radius:5px}
.chat-who{font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.04em;opacity:.75;
  margin-bottom:4px;display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}
.chat-time{font-weight:600;text-transform:none;letter-spacing:0;opacity:.8}
.chat-body{white-space:pre-wrap;line-height:1.6;overflow-wrap:anywhere;word-break:break-word}
.chat-body>*+*{margin-top:8px}
/* bloky kódu a inline kód uvnitř zpráv */
.chat-code{display:block;white-space:pre;overflow-x:auto;margin:8px 0;padding:10px 12px;
  background:#1f2a44;color:#e9edf9;border-radius:10px;font-size:.83rem;
  font-family:ui-monospace,'Cascadia Mono','Consolas',monospace;line-height:1.45}
.chat-row.from-user .chat-code{background:#2b3766}
.chat-inline{padding:1px 6px;border-radius:6px;background:#e7ebf7;color:#2c3557;
  font-family:ui-monospace,'Cascadia Mono','Consolas',monospace;font-size:.88em}
.chat-row.from-user .chat-inline{background:rgba(255,255,255,.22);color:#fff}
/* stav „asistent přemýšlí“ */
.chat-thinking{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.9rem;margin:0 0 8px}
.chat-thinking .dots{display:inline-flex;gap:4px}
.chat-thinking .dots i{width:6px;height:6px;border-radius:50%;background:var(--brand);
  animation:chatdot 1s infinite ease-in-out}
.chat-thinking .dots i:nth-child(2){animation-delay:.15s}
.chat-thinking .dots i:nth-child(3){animation-delay:.3s}
@keyframes chatdot{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}
.chat-input{display:flex;gap:10px;align-items:flex-end}
.chat-input textarea{flex:1;padding:11px 14px;border:1.5px solid var(--line);border-radius:12px;font:inherit;resize:vertical}
.chat-input textarea:focus{border-color:var(--brand);outline:none}
.chat-hint{font-size:.8rem;margin:6px 2px 0}
.chat-input .btn.is-busy{opacity:.6;cursor:progress}
/* import dokumentu z chatu */
.chat-upload{margin-top:18px}
.chat-upload summary{cursor:pointer}
.chat-upload .form.inline{margin-top:10px}
.chat-upload input[type=file]{max-width:100%}
@media(max-width:640px){.chat-row{max-width:100%}.chat{max-height:64vh}}
.proposal{border-left:5px solid var(--accent);background:#fffdf7}
.proposal-actions{display:flex;gap:14px;align-items:flex-end;flex-wrap:wrap;margin-top:10px}
.proposal-actions .form.inline{margin:0}
/* docházka — matice */
.att-matrix td,.att-matrix th{text-align:center}
.att-matrix td:first-child,.att-matrix th:first-child{text-align:left}
.att-cell{font-weight:800}
.att-present{color:#2bb673}
.att-absent{color:#e0526a}
.att-none{color:#c2c9d6}
.att-foot td{background:#f0f3fb;font-weight:700;color:var(--muted)}
/* 2FA QR */
.qr-box{width:180px;height:180px;margin:8px 0}
.qr-box svg{width:100%;height:100%}
.codes-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:8px;margin-top:10px}
.codes-grid code{background:#fff;border:1px solid var(--line);border-radius:8px;padding:8px 10px;
  font-size:1.05rem;text-align:center;letter-spacing:.05em;font-variant-numeric:tabular-nums}
/* přístupnost */
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,
.tile:focus-visible,.opt-btn:focus-visible,.type-chip:focus-visible{
  outline:3px solid #7d8cff;outline-offset:2px;border-radius:6px}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
/* editor her */
.pair-editor{display:flex;flex-direction:column;gap:8px;max-width:520px}
.pair-edit-row{display:flex;align-items:center;gap:10px}
.pair-edit-row input{flex:1;padding:8px 10px;border:1px solid var(--line);border-radius:9px}
.pair-edit-row span{color:var(--muted)}

/* Games library — filtr přes vizuální dlaždice typů */
.type-chips{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}
.type-chip{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:88px;
  padding:12px 10px;border-radius:14px;background:var(--card);border:1.5px solid var(--line);
  color:var(--ink);font-weight:700;font-size:.82rem;cursor:pointer;transition:.14s;text-align:center}
.type-chip .ic{font-size:1.7rem;line-height:1}
.type-chip:hover{border-color:var(--brand);transform:translateY(-2px);text-decoration:none}
.type-chip.on{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px #5b6ef540}
.game-search{display:flex;gap:10px;margin:16px 0 6px;flex-wrap:wrap}
.game-search input[type=search]{flex:1;min-width:220px;padding:11px 14px;border:1.5px solid var(--line);
  border-radius:12px;font-size:1rem;background:#fff}
.game-search input[type=search]:focus{border-color:var(--brand);outline:none}
.theme-filter{margin:0 0 20px}
.theme-filter select{padding:10px 14px;border:1.5px solid var(--line);border-radius:12px;font-size:.95rem;background:#fff;min-width:220px}

.game-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;align-items:stretch}
.game-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px;
  display:flex;flex-direction:column;text-align:center;transition:.16s;box-shadow:0 2px 8px #0b1a4708}
.game-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px #0b1a4718;border-color:#d7def6}
.game-ic{width:76px;height:76px;margin:2px auto 12px;border-radius:20px;display:flex;align-items:center;
  justify-content:center;font-size:2.5rem;background:linear-gradient(135deg,#eef1fb,#e5e9fb)}
.game-type-badge{display:inline-block;align-self:center;background:#eef1fb;color:var(--brand-d);
  border-radius:999px;padding:3px 12px;font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.4px}
.game-card h3{margin:.5em 0 .2em;font-size:1.12rem;line-height:1.25;min-height:2.5em;
  display:flex;align-items:center;justify-content:center}
.game-card .g-meta{color:var(--muted);font-size:.86rem;margin:0 0 14px}
.game-actions{display:flex;gap:8px;justify-content:center;margin-top:auto}
.game-actions .btn{flex:1}
.board-title{text-align:center;font-size:clamp(1.5rem,1.1rem + 1.6vw,2.8rem);text-wrap:balance}

/* Footer */
.site-footer{margin-top:50px;padding:24px 0;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem}

/* Hlavička zůstává na jednom řádku — postupně se skrývá to nejméně důležité:
   1) jméno uživatele, 2) veřejné odkazy (u přihlášených), 3) popisky tlačítek sekcí. */
@media(max-width:1400px){ body.is-auth .uname{display:none} }
@media(max-width:1250px){ body.is-auth .mainnav{display:none} }
@media(max-width:820px){
  .cards,.grid2{grid-template-columns:1fr}
  .hero{flex-direction:column}
  .mainnav{display:none} .uname{display:none}
  .usermenu-panel{right:auto;left:0}
}
@media(max-width:600px){
  .navbtn .lbl{display:none}
  .navbtn{padding:9px 12px;font-size:1.05rem}
  .logo span{display:none}
}