:root{
  --bg:#f5f2ea; --paper:#fffdf8; --ink:#1d2433; --ink-2:#4a5468; --ink-3:#7c8597;
  --line:#e4ded0; --line-2:#d3cbb8;
  --head:#1f2a44; --head-ink:#f3efe4;
  --accent:#2c5aa0; --accent-soft:#e3ebf7;
  --pos:#2f8a57; --pos-soft:#e2f2e8; --neg:#c4473b; --neg-soft:#f8e3e0;
  --warn:#b7791f; --warn-soft:#fbf0dc;
  --good-cell:#e8f4ec; --bad-cell:#fbe7e4; --mid-cell:#fdf3dd; --top-cell:#d4ecdc;
  --shadow:0 1px 2px rgba(30,30,20,.06),0 2px 8px rgba(30,30,20,.05);
  --r:12px;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#14161c; --paper:#1c1f27; --ink:#e9e6de; --ink-2:#b6b9c2; --ink-3:#8a8f9b;
    --line:#2c303a; --line-2:#3a3f4b;
    --head:#0f1219; --head-ink:#ece8dc;
    --accent:#7ea6e6; --accent-soft:#22304a;
    --pos:#5cc08a; --pos-soft:#1d3427; --neg:#ec7d70; --neg-soft:#3d2421;
    --warn:#e3b05c; --warn-soft:#3a2f1c;
    --good-cell:#1c3226; --bad-cell:#3a2220; --mid-cell:#3a321d; --top-cell:#1f4630;
    --shadow:0 1px 2px rgba(0,0,0,.3);
  }
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;-webkit-text-size-adjust:100%}
body{min-height:100vh;-webkit-tap-highlight-color:transparent}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;touch-action:manipulation}
.num,td,th{font-variant-numeric:tabular-nums}
.boot{padding:40px;text-align:center;color:var(--ink-3)}
.muted{color:var(--ink-3)} .small{font-size:.85rem} .tiny{font-size:.75rem}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}
.hidden{display:none!important}

/* ---------- header ---------- */
.top{position:sticky;top:0;z-index:30;background:var(--head);color:var(--head-ink);padding:calc(8px + env(safe-area-inset-top)) 14px 0}
.top-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-bottom:8px}
.brand{font-weight:700;letter-spacing:.2px;font-size:1.05rem;display:flex;align-items:center;gap:8px}
.brand svg{width:22px;height:22px}
.course-sel{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:var(--head-ink);border-radius:10px;padding:8px 10px;min-height:42px;max-width:220px}
.course-sel option{color:#111}
.seg{display:inline-flex;background:rgba(255,255,255,.08);border-radius:10px;padding:3px;gap:2px}
.seg button{border:0;background:transparent;color:var(--head-ink);padding:7px 12px;border-radius:8px;min-height:36px;font-weight:600;opacity:.75}
.seg button.on{background:var(--head-ink);color:var(--head);opacity:1}
.sync{display:flex;align-items:center;gap:6px;font-size:.8rem;opacity:.85;background:transparent;border:0;color:var(--head-ink);padding:6px}
.dot{width:9px;height:9px;border-radius:50%;background:#5cc08a;display:inline-block}
.dot.pending{background:#e3b05c}.dot.off{background:#ec7d70}.dot.local{background:#9aa3b5}
.icon-btn{background:rgba(255,255,255,.08);border:0;color:var(--head-ink);border-radius:10px;min-width:42px;min-height:42px;font-size:1.1rem}
.tabs{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;margin:0 -14px;padding:0 10px}
.tabs::-webkit-scrollbar{display:none}
.tabs button{flex:0 0 auto;border:0;background:transparent;color:var(--head-ink);opacity:.7;padding:11px 13px 12px;font-weight:600;border-bottom:3px solid transparent;font-size:.95rem}
.tabs button.on{opacity:1;border-bottom-color:#e8c76a}

main{padding:16px 14px calc(90px + env(safe-area-inset-bottom));max-width:1400px;margin:0 auto}
h2{font-size:1.25rem;margin:4px 0 12px}
h3{font-size:1.02rem;margin:18px 0 10px;color:var(--ink-2)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:14px}
.grid{display:grid;gap:12px}
.toolbar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:12px}

/* ---------- buttons ---------- */
.btn{border:1px solid var(--line-2);background:var(--paper);border-radius:10px;padding:9px 14px;min-height:44px;font-weight:600;display:inline-flex;align-items:center;gap:6px;justify-content:center}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
@media (prefers-color-scheme: dark){.btn.primary{color:#0f1219}}
.btn.danger{color:var(--neg);border-color:color-mix(in srgb,var(--neg) 40%,transparent)}
.btn.ghost{border-color:transparent;background:transparent}
.btn.big{min-height:56px;font-size:1.1rem;padding:12px 22px;border-radius:14px}
.btn.sm{min-height:34px;padding:5px 10px;font-size:.88rem}
.btn[disabled]{opacity:.45;pointer-events:none}

/* ---------- forms ---------- */
label.f{display:flex;flex-direction:column;gap:5px;font-size:.88rem;color:var(--ink-2);font-weight:600}
input.t,select.t,textarea.t{border:1px solid var(--line-2);border-radius:10px;padding:10px 12px;background:var(--paper);min-height:44px;font-weight:400;color:var(--ink)}
textarea.t{min-height:160px;resize:vertical;line-height:1.45}
input.t:focus,select.t:focus,textarea.t:focus{outline:2px solid var(--accent);outline-offset:0}

/* ---------- aula ---------- */
.cycle{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.bar{flex:1;min-width:140px;height:10px;background:var(--line);border-radius:6px;overflow:hidden}
.bar>i{display:block;height:100%;background:var(--accent);border-radius:6px}
.pick-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(210px,100%),1fr));gap:12px;margin:14px 0 6px}
.pick{background:var(--paper);border:2px solid var(--accent);border-radius:16px;padding:14px;display:flex;flex-direction:column;gap:10px;box-shadow:var(--shadow);animation:pop .25s ease}
@keyframes pop{from{transform:scale(.96);opacity:0}to{transform:none;opacity:1}}
.pick .nm{font-size:1.3rem;font-weight:700;line-height:1.15}
.pick .full{font-size:.8rem;color:var(--ink-3);margin-top:-6px}
.pm{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.pm button{border:0;border-radius:14px;min-height:72px;font-size:1.9rem;font-weight:800;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1}
.pm button small{font-size:.8rem;font-weight:700;margin-top:4px;opacity:.85}
.pm .plus{background:var(--pos-soft);color:var(--pos)}
.pm .minus{background:var(--neg-soft);color:var(--neg)}
.pm button:active{filter:brightness(.92);transform:scale(.97)}
.stats{display:flex;gap:10px;font-size:.88rem;color:var(--ink-2);align-items:center;flex-wrap:wrap}
.pill{display:inline-flex;align-items:center;gap:4px;border-radius:999px;padding:2px 9px;font-size:.82rem;font-weight:700;background:var(--line);color:var(--ink-2)}
.pill.p{background:var(--pos-soft);color:var(--pos)}.pill.n{background:var(--neg-soft);color:var(--neg)}
.pill.ok{background:var(--accent-soft);color:var(--accent)}
.list-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(300px,100%),1fr));gap:8px}
.srow{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:8px 8px 8px 12px;display:flex;align-items:center;gap:8px;min-height:62px}
.srow.picked{border-left:5px solid var(--accent);padding-left:8px}
.srow.inpick{background:var(--accent-soft)}
.srow .who{flex:1;min-width:0;background:transparent;border:0;text-align:left;padding:4px 0}
.srow .who b{display:block;font-size:.98rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.srow .who span{font-size:.78rem;color:var(--ink-3)}
.mini{border:0;border-radius:12px;width:52px;height:48px;font-size:1.4rem;font-weight:800}
.mini.plus{background:var(--pos-soft);color:var(--pos)}.mini.minus{background:var(--neg-soft);color:var(--neg)}
.mini:active{transform:scale(.94)}
.nota-chip{min-width:46px;text-align:center;font-weight:800;font-size:.95rem;padding:4px 6px;border-radius:8px}

/* ---------- deberes ---------- */
.hw-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(320px,100%),1fr));gap:8px}
.hw-row{display:flex;align-items:center;gap:8px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:6px 6px 6px 12px;min-height:60px}
.hw-row .who{flex:1;min-width:0}
.hw-row .who b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.97rem}
.sn{border:2px solid var(--line-2);background:transparent;border-radius:12px;width:60px;height:48px;font-weight:800;font-size:1.15rem;color:var(--ink-3)}
.sn.s.on{background:var(--pos);border-color:var(--pos);color:#fff}
.sn.n.on{background:var(--neg);border-color:var(--neg);color:#fff}

/* ---------- tablas ---------- */
.tbl-wrap{overflow:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--paper);box-shadow:var(--shadow);max-height:calc(100vh - 230px)}
table.g{border-collapse:separate;border-spacing:0;width:max-content;min-width:100%;font-size:.92rem}
table.g th,table.g td{border-bottom:1px solid var(--line);border-right:1px solid var(--line);padding:0;text-align:center;height:42px;background:var(--paper)}
table.g thead th{position:sticky;top:0;z-index:2;background:var(--paper);font-size:.78rem;font-weight:700;color:var(--ink-2);padding:6px 6px;vertical-align:bottom;min-width:76px;max-width:130px}
table.g thead tr:nth-child(2) th{top:var(--h1,0px)}
table.g th.sticky,table.g td.sticky{position:sticky;left:0;z-index:1;text-align:left;padding:0 12px;min-width:200px;max-width:260px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:600;border-right:2px solid var(--line-2)}
table.g thead th.sticky{z-index:3}
table.g tr.avg td{background:var(--bg);font-weight:700;color:var(--ink-2)}
table.g td.calc{font-weight:700;padding:0 8px}
table.g td.calc.strong{font-size:1rem}
table.g td input{width:100%;height:42px;border:0;background:transparent;text-align:center;font-variant-numeric:tabular-nums;padding:0 4px;min-width:64px}
table.g td input:focus{outline:2px solid var(--accent);outline-offset:-2px;background:var(--accent-soft)}
th.colh{cursor:pointer}
th.colh:hover{background:var(--accent-soft)}
th .cat{display:inline-block;margin-top:4px;font-size:.66rem;padding:1px 6px;border-radius:999px;background:var(--line);color:var(--ink-2);font-weight:700;text-transform:uppercase;letter-spacing:.3px}
th .cat.examen{background:var(--accent-soft);color:var(--accent)}
th .w{display:block;font-weight:500;color:var(--ink-3);font-size:.7rem;margin-top:2px}
th.sep,td.sep{border-left:2px solid var(--line-2)}
.c-bad{background:var(--bad-cell)!important}.c-good{background:var(--good-cell)!important}
.c-mid{background:var(--mid-cell)!important}.c-top{background:var(--top-cell)!important}
td.auto{color:var(--ink-2);font-style:italic;padding:0 6px}
td.hwc{cursor:pointer;font-weight:800;min-width:46px;user-select:none}
td.hwc.S{color:var(--pos)} td.hwc.N{color:var(--neg)}

/* ---------- vista / campana / informe ---------- */
.kpis{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:12px;margin-bottom:14px}
.kpi{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:12px 14px}
.kpi .l{font-size:.78rem;color:var(--ink-3);font-weight:700;text-transform:uppercase;letter-spacing:.4px}
.kpi .v{font-size:1.7rem;font-weight:800;margin-top:4px}
.kpi .s{font-size:.82rem;color:var(--ink-2)}
.two{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(340px,100%),1fr));gap:14px;align-items:start}
.chart svg{width:100%;height:auto;display:block}
.chart .ax{stroke:var(--line-2)} .chart .gl{stroke:var(--line)}
.chart text{fill:var(--ink-2);font-size:11px;font-family:var(--font)}
table.s{border-collapse:collapse;width:100%;font-size:.92rem}
table.s td,table.s th{border-bottom:1px solid var(--line);padding:8px 8px;text-align:left}
table.s th{font-size:.78rem;color:var(--ink-3);text-transform:uppercase;letter-spacing:.3px}
table.s td.r,table.s th.r{text-align:right}
.legend{display:flex;gap:14px;font-size:.82rem;color:var(--ink-2);flex-wrap:wrap;margin-top:6px}
.legend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:5px;vertical-align:-1px}

/* ---------- alumnos ---------- */
.st-item{display:flex;gap:8px;align-items:center;padding:6px 0;border-bottom:1px solid var(--line)}
.st-item input.t{flex:1;min-width:0}
.st-item .idx{width:28px;text-align:right;color:var(--ink-3);font-size:.85rem}
.st-item.off input.t{opacity:.5;text-decoration:line-through}

/* ---------- empty ---------- */
.empty{text-align:center;padding:48px 20px;color:var(--ink-2)}
.empty .big{font-size:2.6rem;margin-bottom:8px}
.empty p{max-width:460px;margin:8px auto 18px;line-height:1.5}

/* ---------- modal ---------- */
.ov{position:fixed;inset:0;background:rgba(10,12,20,.45);z-index:50;display:flex;align-items:flex-end;justify-content:center;padding:10px;animation:fade .15s}
@media (min-width:700px){.ov{align-items:center}}
@keyframes fade{from{opacity:0}to{opacity:1}}
.md{background:var(--paper);border-radius:18px;width:100%;max-width:520px;max-height:88vh;overflow:auto;padding:18px;box-shadow:0 10px 40px rgba(0,0,0,.3)}
.md h3{margin:0 0 14px;color:var(--ink);font-size:1.15rem}
.md .acts{display:flex;gap:8px;justify-content:flex-end;margin-top:18px;flex-wrap:wrap}
.md .stack{display:flex;flex-direction:column;gap:12px}
.ev-item{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}

/* ---------- toast ---------- */
#toast-root{position:fixed;left:50%;bottom:calc(18px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:60;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none;width:min(94vw,520px)}
.toast{pointer-events:auto;background:var(--head);color:var(--head-ink);border-radius:12px;padding:10px 10px 10px 16px;display:flex;gap:12px;align-items:center;box-shadow:0 6px 24px rgba(0,0,0,.25);animation:pop .2s ease;font-weight:600;width:100%}
.toast button{background:rgba(255,255,255,.14);border:0;color:inherit;border-radius:8px;padding:8px 12px;font-weight:700;min-height:40px}
.toast .msg{flex:1}

/* ---------- login ---------- */
.login{max-width:420px;margin:8vh auto;padding:0 16px}
.login .card{padding:24px}
.login h1{font-size:1.5rem;margin:0 0 6px}
.err{color:var(--neg);font-size:.9rem;font-weight:600}

/* ---------- print ---------- */
@media print{
  .top,.toolbar,.no-print,#toast-root{display:none!important}
  body,main{background:#fff;color:#000;padding:0}
  .card,.tbl-wrap{box-shadow:none;border-color:#ccc;max-height:none;overflow:visible}
}
@media (max-width:620px){
  .course-sel{max-width:150px}
  .brand span{display:none}
  .list-grid,.hw-list{grid-template-columns:1fr}
  .pick-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .pick{padding:10px;gap:8px}
  .pick .nm{font-size:1.02rem}
  .pick .full{display:none}
  .pm{gap:6px}
  .pm button{min-height:64px;font-size:1.6rem}
  .pm button small{font-size:.72rem}
  .pick .stats{font-size:.8rem}
  main{padding-left:10px;padding-right:10px}
  .top-row{gap:6px}
  .kpi .v{font-size:1.4rem}
}
@media (max-width:620px){.pm .lbl{display:none}}
.list-grid>*,.hw-list>*,.pick-grid>*{min-width:0}