:root{
  --ink:#0b1220; --ink2:#475569; --glass:rgba(255,255,255,.58); --glass-b:rgba(255,255,255,.75); --line:rgba(15,23,42,.10);
  --acc:#0a84ff; --ok:#30d158; --warn:#ff9f0a; --bad:#ff453a; --shadow:0 10px 30px rgba(15,23,42,.14);
  --bg1:#d9f3ee; --bg2:#dbe7ff; --bg3:#f1e4ff;
  --safe-t:env(safe-area-inset-top,0px); --safe-b:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){:root{
  --ink:#f1f5f9; --ink2:#a8b3c4; --glass:rgba(30,41,59,.55); --glass-b:rgba(255,255,255,.14); --line:rgba(255,255,255,.12);
  --shadow:0 10px 30px rgba(0,0,0,.45); --bg1:#04201d; --bg2:#0b1633; --bg3:#1d1033;
}}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;min-height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Segoe UI",system-ui,Roboto,sans-serif;color:var(--ink);
  background:linear-gradient(160deg,var(--bg1),var(--bg2) 55%,var(--bg3));background-attachment:fixed;-webkit-font-smoothing:antialiased}
.bg{position:fixed;inset:0;overflow:hidden;z-index:-1}
.bg i{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55}
.bg i:nth-child(1){width:60vmax;height:60vmax;left:-20vmax;top:-18vmax;background:#34d3b8}
.bg i:nth-child(2){width:50vmax;height:50vmax;right:-18vmax;top:25vh;background:#6ea8ff}
.bg i:nth-child(3){width:46vmax;height:46vmax;left:10vw;bottom:-24vmax;background:#c59bff}
@media (prefers-color-scheme:dark){.bg i{opacity:.28}}
main{max-width:760px;margin:0 auto;padding:calc(18px + var(--safe-t)) 16px calc(40px + var(--safe-b))}
.glass{background:var(--glass);-webkit-backdrop-filter:blur(26px) saturate(180%);backdrop-filter:blur(26px) saturate(180%);
  border:1px solid var(--glass-b);border-radius:24px;box-shadow:var(--shadow)}
.spin{width:38px;height:38px;margin:30vh auto 0;border:4px solid var(--line);border-top-color:var(--acc);border-radius:50%;animation:r .8s linear infinite}
@keyframes r{to{transform:rotate(360deg)}}
h1{font-size:34px;line-height:1.1;margin:0;font-weight:800;letter-spacing:-.02em}
h2{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--ink2);margin:26px 8px 8px;font-weight:700}
p{margin:0}.muted{color:var(--ink2)}.small{font-size:13px}

/* Login */
.login{margin-top:12vh;padding:28px 24px;text-align:center}
.logo{width:76px;height:76px;margin:0 auto 14px;border-radius:22px;background:linear-gradient(145deg,#14b8a6,#0a84ff);display:grid;place-items:center;font-size:38px;box-shadow:0 8px 20px rgba(10,132,255,.35)}
.login h1{font-size:28px}.login .sub{margin:6px 0 20px}
.field{display:block;text-align:left;margin:0 0 12px}
.field span{display:block;font-size:12px;font-weight:600;color:var(--ink2);margin:0 0 4px 6px}
.field input{width:100%;font:inherit;font-size:17px;padding:14px 16px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.55);color:var(--ink);outline:none}
@media (prefers-color-scheme:dark){.field input{background:rgba(0,0,0,.25)}}
.field input:focus{border-color:var(--acc);box-shadow:0 0 0 4px rgba(10,132,255,.2)}
.btn{font:inherit;font-weight:700;font-size:17px;border:0;border-radius:14px;padding:14px 18px;background:var(--acc);color:#fff;cursor:pointer;width:100%}
.btn:disabled{opacity:.6;cursor:progress}
.btn.ghost{background:var(--glass);color:var(--ink);border:1px solid var(--glass-b);width:auto;padding:9px 14px;font-size:14px;font-weight:600}
.btn.small{width:auto;padding:8px 12px;font-size:13px}
.err{min-height:22px;margin:10px 0 0;color:var(--bad);font-size:14px;font-weight:600}
.note{margin-top:14px;font-size:12px;color:var(--ink2)}

/* Kopf */
.top{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin:8px 4px 10px}
.top .hello{font-size:15px;color:var(--ink2);font-weight:600}
.chip{display:inline-block;padding:3px 10px;border-radius:99px;background:var(--glass);border:1px solid var(--glass-b);font-size:12px;font-weight:700;margin-left:6px;vertical-align:middle}
.banner{margin:10px 4px;padding:10px 14px;border-radius:16px;font-size:13px;background:rgba(255,159,10,.18);border:1px solid rgba(255,159,10,.4)}

/* Karten */
.list{display:grid;gap:10px}
.card{display:flex;align-items:center;gap:14px;padding:14px 16px;text-decoration:none;color:inherit;transition:transform .12s}
.card:active{transform:scale(.985)}
.ico{flex:none;width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:26px;color:#fff;box-shadow:0 4px 12px rgba(0,0,0,.18)}
.ico.mathe{background:linear-gradient(145deg,#5ea0ff,#6c5ce7)}.ico.informatik{background:linear-gradient(145deg,#34d3b8,#0e9f8e)}
.ico.klasse,.ico.privat{background:linear-gradient(145deg,#ffb454,#ff7a45)}.ico.test{background:linear-gradient(145deg,#ff6b6b,#e11d48)}
.card .t{font-weight:700;font-size:17px;line-height:1.25}.card .s{font-size:13px;color:var(--ink2);margin-top:2px}
.card .tags{margin-top:6px;display:flex;gap:6px;flex-wrap:wrap;align-items:flex-start;align-content:flex-start}
.card>div:nth-child(2){flex:1;min-width:0}
.tag{font-size:11px;font-weight:700;padding:2px 8px;border-radius:99px;background:rgba(10,132,255,.14);color:var(--acc)}
.tag.test{background:rgba(255,69,58,.15);color:var(--bad)}.tag.lg{background:rgba(255,159,10,.18);color:#b45309}
@media (prefers-color-scheme:dark){.tag.lg{color:#fbbf24}}
.card .chev{margin-left:auto;color:var(--ink2);font-size:22px}
.empty{padding:26px;text-align:center}

/* Lehrer */
.tabs{display:flex;gap:6px;padding:5px;border-radius:18px;margin:12px 0 4px;overflow-x:auto}
.tabs button{flex:1;white-space:nowrap;font:inherit;font-size:13px;font-weight:700;border:0;background:transparent;color:var(--ink2);padding:9px 8px;border-radius:14px;cursor:pointer}
.tabs button[aria-selected=true]{background:var(--acc);color:#fff}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin:10px 4px}
.chips button{font:inherit;font-size:13px;font-weight:700;border:1px solid var(--glass-b);background:var(--glass);color:var(--ink);padding:6px 12px;border-radius:99px;cursor:pointer}
.chips.scroll{flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}.chips.scroll::-webkit-scrollbar{display:none}.chips.scroll button{flex:none;white-space:nowrap}
.chips button[aria-pressed=true]{background:var(--acc);color:#fff;border-color:var(--acc)}
.row{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line)}
.row:last-child{border-bottom:0}.row .grow{flex:1;min-width:0}.row .t{font-weight:600}.row .s{font-size:12px;color:var(--ink2)}
.sw{position:relative;flex:none;width:51px;height:31px;border-radius:99px;background:rgba(120,120,128,.35);border:0;cursor:pointer;transition:background .2s}
.sw::after{content:"";position:absolute;top:2px;left:2px;width:27px;height:27px;border-radius:50%;background:#fff;box-shadow:0 2px 5px rgba(0,0,0,.3);transition:transform .2s}
.sw[aria-checked=true]{background:var(--ok)}.sw[aria-checked=true]::after{transform:translateX(20px)}
select{font:inherit;font-size:14px;padding:7px 10px;border-radius:10px;border:1px solid var(--line);background:var(--glass);color:var(--ink)}
.group{margin-bottom:12px;overflow:hidden}.group>.hd{padding:12px 16px 4px;font-weight:800}

/* Dashboard (Lehrer) */
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:10px 0}
.tile{padding:12px 8px;text-align:center}.tile b{display:block;font-size:24px}.tile span{font-size:11px;color:var(--ink2);font-weight:600}
.heat{overflow:auto;padding:10px}
.heat table{border-collapse:separate;border-spacing:3px;font-size:12px;width:100%}
.heat th{font-weight:700;color:var(--ink2);padding:2px 4px;white-space:nowrap}
.heat th.l{text-align:left;position:sticky;left:0;background:var(--glass);border-radius:8px}
.heat td{min-width:34px;height:28px;border-radius:7px;text-align:center;font-size:11px;font-weight:700;color:#fff}
.c0{background:rgba(120,120,128,.25);color:var(--ink2)}.c1{background:#ff6b6b}.c2{background:#ffa94d}.c3{background:#a3d94a}.c4{background:#2fbf71}
main.wide{max-width:1180px}
.src{margin:6px 6px 2px;font-size:12px;color:var(--ink2);display:flex;flex-wrap:wrap;gap:4px 8px;align-items:center}
.src .ok{color:var(--ink2)}.src .bad{color:var(--bad);font-weight:700}.src .btn{margin-left:auto}
.heat{max-height:72vh}
.heat th.pg{text-align:center;color:var(--ink);font-size:11px;border-bottom:2px solid var(--line);white-space:normal;max-width:220px}
.heat thead th{position:sticky;top:0;background:var(--glass-b);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);z-index:2;border-radius:8px}
.heat thead tr:nth-child(2) th{top:24px;font-size:10px;font-weight:600}
.heat thead th.l{z-index:3}
.heat th.l small{color:var(--ink2);font-weight:600}
.heat button.nm{font:inherit;font-weight:700;font-size:12px;color:var(--ink);background:none;border:0;padding:3px 2px;cursor:pointer;text-align:left;text-decoration:underline dotted var(--ink2);text-underline-offset:3px}
.heat button.nm:hover,.heat button.nm:focus-visible{color:var(--acc);outline:none}
.heat td{cursor:default}
.heat td.lt{min-width:84px;background:none;color:var(--ink2);font-weight:600;white-space:nowrap}
.cn{background:#5ea0ff}
.cz{background:repeating-linear-gradient(45deg,#8e8e93 0 5px,#a1a1a6 5px 10px)}
.heat td.cz{color:#fff}
.sheet-bg{position:fixed;inset:0;z-index:20;background:rgba(15,23,42,.38);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);display:flex;align-items:flex-end;justify-content:center}
.sheet{width:100%;max-width:640px;max-height:86vh;overflow:auto;padding:18px 18px calc(22px + var(--safe-b));border-radius:26px 26px 0 0;background:var(--glass-b);animation:up .22s ease-out}
@keyframes up{from{transform:translateY(30px);opacity:0}to{transform:none;opacity:1}}
@media (min-width:700px){.sheet-bg{align-items:center}.sheet{border-radius:26px}}
.sh-top{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;margin-bottom:8px}
.sh-top h3{margin:0;font-size:22px;letter-spacing:-.01em}.sh-top .s{font-size:12px;margin-top:2px}
.dsec{padding:10px 0;border-top:1px solid var(--line)}.dsec .dh{display:flex;gap:8px;align-items:center;margin-bottom:6px}
.drow{display:grid;grid-template-columns:96px 1fr minmax(90px,auto);gap:8px;align-items:center;font-size:12px;margin:4px 0}
.drow .dl{font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.drow .dv{color:var(--ink2);text-align:right}
.bar{display:block;height:9px;border-radius:99px;background:rgba(120,120,128,.22);overflow:hidden}.bar i{display:block;height:100%;border-radius:99px}
.bar i.c0{background:transparent}
.kv{display:flex;flex-wrap:wrap;gap:4px 12px;margin-top:6px;font-size:12px}.kv em{font-style:normal;color:var(--ink2)}
.legend{display:flex;gap:10px;flex-wrap:wrap;font-size:11px;color:var(--ink2);margin:8px 4px}.legend i{display:inline-block;width:12px;height:12px;border-radius:4px;vertical-align:-2px;margin-right:4px}
@media (max-width:420px){h1{font-size:30px}.tiles{grid-template-columns:repeat(2,1fr)}}

.heat tbody th.l{z-index:1;min-width:120px;padding:0 6px}.heat tbody tr.rw{cursor:pointer;-webkit-tap-highlight-color:rgba(0,0,0,.08)}.heat tbody tr.rw:hover th.l{background:var(--glass-b)}.heat button.nm{min-height:36px;touch-action:manipulation}.heat td{cursor:pointer}
main.deckmode{max-width:none;padding:0}
/* Meldungen */
.meld .mgrp{margin-top:10px;padding:8px 12px}.meld .mhead{all:unset;cursor:pointer;display:flex;gap:10px;align-items:center;width:100%;flex-wrap:wrap}
.meld .mcnt{min-width:28px;text-align:center;border-radius:99px;background:#e8590c;color:#fff;font-weight:700;padding:2px 8px}
.meld .mbadge{margin-left:6px;font-size:.8rem;padding:2px 8px;border-radius:99px;background:#c92a2a;color:#fff}.meld .mbadge.f{background:#868e96}
.meld .mrow{border-top:1px solid #8884;padding:8px 0}.meld .mcom{margin:4px 0;white-space:pre-wrap}.meld .mbtns{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px;align-items:center}
/* Meine Aufgaben (Briefings-Tab) */
.au{margin:12px 0 22px}.au h3{margin:14px 0 6px;font-size:1rem}
.au-it{padding:10px 12px;margin:6px 0;border-radius:14px}.au-it.done .au-tx b{text-decoration:line-through;opacity:.6}
.au-row{display:flex;gap:10px;align-items:flex-start}.au-row input[type=checkbox]{width:24px;height:24px;flex:none;margin-top:2px}
.au-tx{flex:1;display:flex;flex-direction:column;gap:2px;cursor:pointer;min-width:0}.au-c{font-size:.85rem;white-space:pre-wrap}
.au-det{margin:8px 0 0 34px}.au-det textarea,.au-msg textarea{width:100%;box-sizing:border-box;margin:6px 0;font:inherit;border-radius:10px;padding:8px}
.au-msg{padding:12px;margin-top:14px;border-radius:14px}.au-s{font-size:.8rem;margin-left:34px}
.au-kat{margin:8px 0}.au-kat>summary{cursor:pointer;font-weight:600;padding:8px 4px;font-size:1.02rem}

/* KlasseFit-Branding */
.logo.kf{background:none;box-shadow:0 8px 20px rgba(31,163,74,.35);overflow:hidden}.logo.kf img{width:76px;height:76px;display:block}
.kf-wm{line-height:0;margin:2px 0 0}.kf-wm img{width:220px;max-width:80%;height:auto;display:inline-block}