:root{
  --bg:#f6f5f1;--surface:#fff;--surface2:#f0eee8;--ink:#1d1d22;--muted:#6b6b76;--line:#e6e4dc;
  --accent:#4f46e5;--accent-ink:#fff;--accent-soft:#eceafd;--danger:#dc2626;--ok:#059669;--warn:#d97706;
  --radius:16px;--shadow:0 1px 2px rgba(0,0,0,.05),0 6px 18px rgba(0,0,0,.05);
  --sat:env(safe-area-inset-top,0px);--sab:env(safe-area-inset-bottom,0px);
  --sal:env(safe-area-inset-left,0px);--sar:env(safe-area-inset-right,0px);
  color-scheme:light;
}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){
  --bg:#121316;--surface:#1c1d22;--surface2:#25262d;--ink:#ececf1;--muted:#9a9aa6;--line:#2c2d35;
  --accent:#8b86f9;--accent-ink:#12131a;--accent-soft:#2a2850;--shadow:0 1px 2px rgba(0,0,0,.4);color-scheme:dark}}
:root[data-theme=dark]{
  --bg:#121316;--surface:#1c1d22;--surface2:#25262d;--ink:#ececf1;--muted:#9a9aa6;--line:#2c2d35;
  --accent:#8b86f9;--accent-ink:#12131a;--accent-soft:#2a2850;--shadow:0 1px 2px rgba(0,0,0,.4);color-scheme:dark}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%}
body{font:16px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);overscroll-behavior:none}
body.noscroll{overflow:hidden}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;touch-action:manipulation}
h1,h2,h3{margin:0;line-height:1.2;letter-spacing:-.01em}
h1{font-size:1.9rem}h2{font-size:1.2rem}h3{font-size:1rem}
a{color:inherit;text-decoration:none}
.muted{color:var(--muted)}.sp{flex:1}
.hide{display:none!important}

/* layout */
#app{display:grid;grid-template-columns:250px 1fr;min-height:100dvh}
#nav{position:sticky;top:0;height:100dvh;overflow:auto;padding:calc(18px + var(--sat)) 14px calc(18px + var(--sab)) calc(14px + var(--sal));
  background:var(--surface);border-right:1px solid var(--line);display:flex;flex-direction:column;gap:2px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem;padding:4px 10px 14px}
.brand i{width:34px;height:34px;border-radius:10px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-style:normal}
.nav-i{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:12px;min-height:46px;font-weight:550;color:var(--ink)}
.nav-i:hover{background:var(--surface2)}
.nav-i.on{background:var(--accent-soft);color:var(--accent)}
.nav-i .em{width:24px;text-align:center;font-size:1.15rem}
.nav-i .badge{margin-left:auto;background:var(--danger);color:#fff;border-radius:99px;font-size:.75rem;padding:1px 8px;font-weight:700}
.nav-sec{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);padding:16px 12px 6px;display:flex;align-items:center}
.nav-sec button{margin-left:auto;border:0;background:none;color:var(--accent);font-weight:700;font-size:.85rem;padding:4px 6px}
.dot{width:12px;height:12px;border-radius:50%;background:var(--c,var(--accent));flex:none;margin:0 6px}
#main{padding:calc(24px + var(--sat)) calc(28px + var(--sar)) 60px 28px;max-width:1180px;width:100%;margin:0 auto}

@media(max-width:900px){
  #app{grid-template-columns:1fr}
  #nav{position:fixed;inset:auto 0 0 0;height:auto;flex-direction:row;justify-content:space-around;z-index:20;
    padding:6px 6px calc(6px + var(--sab));border-right:0;border-top:1px solid var(--line);overflow:visible}
  .brand,.nav-sec,.nav-course{display:none}
  .nav-i{flex-direction:column;gap:2px;font-size:.72rem;padding:6px 8px;min-height:52px;flex:1;justify-content:center;position:relative}
  .nav-i .badge{position:absolute;top:2px;left:52%;margin:0}
  .nav-i.hide-s{display:none}
  #main{padding:calc(16px + var(--sat)) 16px calc(100px + var(--sab))}
}

/* generic */
.page-h{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}
.btn{border:1px solid var(--line);background:var(--surface);border-radius:12px;padding:10px 16px;min-height:44px;font-weight:600;display:inline-flex;align-items:center;gap:8px}
.btn:hover{background:var(--surface2)}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:transparent}
.btn.primary:hover{filter:brightness(1.08)}
.btn.danger{color:var(--danger)}
.btn.sm{min-height:38px;padding:6px 12px;font-size:.92rem}
.btn.ghost{background:transparent;border-color:transparent}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.card h2{margin-bottom:12px;display:flex;align-items:center;gap:8px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.g-cards{grid-template-columns:repeat(auto-fill,minmax(210px,1fr))}
.chip{display:inline-flex;align-items:center;gap:6px;background:color-mix(in srgb,var(--c,var(--accent)) 16%,transparent);color:var(--ink);border-radius:99px;padding:2px 10px;font-size:.8rem;font-weight:600;border:0}
.chip::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--c,var(--accent))}
.empty{text-align:center;color:var(--muted);padding:34px 16px}
.empty b{display:block;color:var(--ink);font-size:1.05rem;margin-bottom:4px}
.search{width:100%;padding:12px 16px;border-radius:14px;border:1px solid var(--line);background:var(--surface);min-height:48px}
.row{display:flex;align-items:center;gap:12px;padding:10px 4px;border-bottom:1px solid var(--line);min-height:52px}
.row:last-child{border-bottom:0}
.row.click{cursor:pointer}
.row .grow{flex:1;min-width:0}
.row .t{font-weight:600;overflow:hidden;text-overflow:ellipsis}
.row .s{font-size:.85rem;color:var(--muted)}
.row.done .t{text-decoration:line-through;color:var(--muted)}
.chk-b{width:28px;height:28px;border-radius:50%;border:2px solid var(--line);background:var(--surface);flex:none;display:grid;place-items:center;font-size:.9rem;color:transparent;padding:0}
.chk-b.on{background:var(--ok);border-color:var(--ok);color:#fff}
.late{color:var(--danger);font-weight:700}.soon{color:var(--warn);font-weight:700}

/* course cards */
.course{border-radius:var(--radius);padding:18px;background:var(--c);color:#fff;min-height:130px;display:flex;flex-direction:column;justify-content:space-between;cursor:pointer;box-shadow:var(--shadow)}
.course h3{font-size:1.1rem}.course small{opacity:.9}
.course .stats{display:flex;gap:12px;font-size:.85rem;opacity:.95;flex-wrap:wrap}
.c-head{background:var(--c);color:#fff;border-radius:var(--radius);padding:22px;margin-bottom:16px}
.c-head .sub{opacity:.92}
.c-head .btn{background:rgba(255,255,255,.2);border-color:transparent;color:#fff}
.slots{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.slot{background:rgba(255,255,255,.2);border:0;color:#fff;border-radius:99px;padding:6px 12px;font-size:.85rem;min-height:34px}
.tabs{display:flex;gap:6px;margin-bottom:16px;overflow:auto}
.tab{padding:10px 18px;border-radius:99px;border:1px solid var(--line);background:var(--surface);font-weight:600;min-height:44px;display:inline-flex;align-items:center;white-space:nowrap}
.tab.on{background:var(--ink);color:var(--bg);border-color:transparent}

/* notes */
.note{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;cursor:pointer;display:flex;flex-direction:column;box-shadow:var(--shadow);position:relative}
.note .thumb{height:150px;background:var(--surface2);overflow:hidden;position:relative}
.note .thumb img{width:100%;height:100%;object-fit:cover;object-position:top;background:#fff}
.note .thumb p{margin:0;padding:12px;font-size:.82rem;color:var(--muted);overflow:hidden;max-height:150px}
.note .meta{padding:12px 14px;display:flex;flex-direction:column;gap:6px}
.note .meta b{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.note .kind{position:absolute;top:8px;left:8px;background:var(--surface);border-radius:8px;padding:2px 7px;font-size:.9rem;box-shadow:var(--shadow)}
.note .more{position:absolute;top:6px;right:6px;border:0;background:var(--surface);border-radius:10px;width:38px;height:38px;font-size:1.1rem;box-shadow:var(--shadow)}

/* files */
.file{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;cursor:pointer;display:flex;flex-direction:column}
.file .fi{height:120px;background:var(--surface2);display:grid;place-items:center;font-size:2.6rem;overflow:hidden}
.file .fi img{width:100%;height:100%;object-fit:cover}
.file .fm{padding:10px 12px;font-size:.88rem}
.file .fm b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.drop{border:2px dashed var(--line);border-radius:var(--radius);padding:14px;margin-bottom:16px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.drop.over{border-color:var(--accent);background:var(--accent-soft)}

/* schedule */
.week{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(150px,1fr);gap:12px;overflow:auto}
.day{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:12px;min-height:220px}
.day h3{margin-bottom:10px}.day.today{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}
.cls{background:color-mix(in srgb,var(--c) 15%,var(--surface));border-left:5px solid var(--c);border-radius:10px;padding:8px 10px;margin-bottom:8px;cursor:pointer;font-size:.9rem}
.cls b{display:block}

/* dialogs */
dialog{border:0;border-radius:20px;padding:0;background:var(--surface);color:var(--ink);width:min(520px,calc(100vw - 24px));max-height:calc(100dvh - 32px);box-shadow:0 20px 60px rgba(0,0,0,.35)}
dialog::backdrop{background:rgba(10,10,20,.5)}
dialog.wide{width:min(900px,calc(100vw - 24px))}
.dlg-in{padding:22px;display:flex;flex-direction:column;gap:14px}
.dlg-in label{display:flex;flex-direction:column;gap:5px;font-size:.85rem;font-weight:600;color:var(--muted)}
.dlg-in input:not([type=radio]),.dlg-in select,.dlg-in textarea{padding:11px 12px;border-radius:12px;border:1px solid var(--line);background:var(--bg);min-height:46px;font-weight:400;color:var(--ink)}
.dlg-in .two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.btns{display:flex;gap:10px;align-items:center;margin-top:4px;flex-wrap:wrap}
.swatches{display:flex;gap:10px;flex-wrap:wrap}
.swatches label{flex-direction:row}
.swatches input{position:absolute;opacity:0;pointer-events:none}
.swatches span{width:38px;height:38px;border-radius:50%;display:block;border:3px solid var(--surface);box-shadow:0 0 0 2px var(--line)}
.swatches input:checked+span{box-shadow:0 0 0 3px var(--ink)}
.choice{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.choice button{padding:18px 10px;border-radius:16px;border:2px solid var(--line);background:var(--surface);font-weight:700;display:flex;flex-direction:column;align-items:center;gap:6px;font-size:1rem}
.choice button span{font-size:2rem}
.choice button:hover{border-color:var(--accent)}
.viewer img{max-width:100%;max-height:70dvh;display:block;margin:0 auto;border-radius:10px}
.viewer iframe{width:100%;height:65dvh;border:0;border-radius:10px;background:#fff}
#toast{position:fixed;left:50%;bottom:calc(90px + var(--sab));transform:translate(-50%,20px);background:var(--ink);color:var(--bg);padding:12px 20px;border-radius:99px;opacity:0;pointer-events:none;transition:.25s;z-index:200;max-width:90vw;text-align:center;font-weight:550}
#toast.on{opacity:1;transform:translate(-50%,0)}

/* editor */
#editor{position:fixed;inset:0;z-index:100;background:var(--bg);display:flex;flex-direction:column;padding-top:var(--sat)}
#editor[hidden]{display:none}
.ed-top{display:flex;align-items:center;gap:10px;padding:8px 12px;background:var(--surface);border-bottom:1px solid var(--line);flex-wrap:wrap}
.ed-top input#ed-title{flex:1;min-width:140px;font-size:1.15rem;font-weight:700;border:0;background:transparent;outline:none;padding:8px;min-height:44px}
.ed-top select{padding:8px 10px;border-radius:10px;border:1px solid var(--line);background:var(--bg);min-height:42px;max-width:160px}
.seg{display:inline-flex;background:var(--surface2);border-radius:12px;padding:3px}
.seg button{border:0;background:transparent;padding:8px 14px;border-radius:10px;font-weight:650;min-height:40px}
.seg button.on{background:var(--surface);box-shadow:var(--shadow);color:var(--accent)}
#ed-status{font-size:.8rem;color:var(--muted);min-width:70px;text-align:right}
.ib{border:0;background:transparent;min-width:44px;min-height:44px;border-radius:12px;font-size:1.2rem}
.ib:hover{background:var(--surface2)}
#ed-tools{display:flex;gap:6px;align-items:center;padding:8px 12px;background:var(--surface);border-bottom:1px solid var(--line);flex-wrap:wrap}
.tg{display:flex;gap:4px;align-items:center;padding-right:10px;margin-right:4px;border-right:1px solid var(--line);flex:none}
.tg:last-child{border-right:0}
.tl{border:1px solid transparent;background:transparent;border-radius:10px;min-width:42px;min-height:42px;padding:4px 10px;font-weight:650;white-space:nowrap}
.tl:hover{background:var(--surface2)}
.tl.on{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}
.sw{width:30px;height:30px;border-radius:50%;border:3px solid var(--surface);box-shadow:0 0 0 2px var(--line);padding:0;flex:none}
.sw.on{box-shadow:0 0 0 3px var(--ink)}
.szb{width:42px;height:42px;border:1px solid transparent;border-radius:10px;background:transparent;display:grid;place-items:center;padding:0}
.szb.on{background:var(--accent-soft);border-color:var(--accent)}
.szb i{display:block;background:var(--ink);border-radius:50%}
#ed-body{flex:1;overflow:auto;-webkit-overflow-scrolling:touch;padding-bottom:var(--sab)}
#ed-text{max-width:820px;margin:0 auto;min-height:100%;padding:28px 24px 120px;outline:none;font-size:1.08rem;line-height:1.65;background:var(--surface)}
#ed-text:empty::before{content:"Empieza a escribir tus apuntes…";color:var(--muted)}
#ed-text h1{font-size:1.7rem;margin:.8em 0 .3em}#ed-text h2{font-size:1.35rem;margin:.8em 0 .3em}
#ed-text img{max-width:100%;border-radius:8px;margin:8px 0}
#ed-text blockquote{margin:.6em 0;padding:.2em 1em;border-left:4px solid var(--accent);color:var(--muted)}
#ed-text .chk{position:relative;padding-left:34px}
#ed-text .chk::before{content:"";position:absolute;left:4px;top:.35em;width:20px;height:20px;border:2px solid var(--muted);border-radius:6px;background:var(--surface)}
#ed-text .chk.done::before{background:var(--ok);border-color:var(--ok);content:"✓";color:#fff;font-size:.9rem;line-height:16px;text-align:center}
#ed-text .chk.done{color:var(--muted);text-decoration:line-through}
#ed-pages{max-width:900px;margin:0 auto;padding:16px 12px 140px;display:flex;flex-direction:column;gap:18px;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
.pg{position:relative;width:100%;aspect-ratio:1000/1414;background:#fff;box-shadow:0 2px 14px rgba(0,0,0,.18);border-radius:4px;touch-action:none;overflow:hidden;cursor:crosshair}
.pg canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.pg .pn{position:absolute;right:10px;bottom:6px;font-size:.7rem;color:#999;pointer-events:none}
.paper-lines .pg:not(.bg){background-image:linear-gradient(to bottom,transparent calc(var(--u) - 1px),#c8d3ea calc(var(--u) - 1px));background-size:100% var(--u);background-position:0 calc(var(--u) * 1.5)}
.paper-grid .pg:not(.bg){background-image:linear-gradient(#d5dcec 1px,transparent 1px),linear-gradient(90deg,#d5dcec 1px,transparent 1px);background-size:var(--u) var(--u)}
.paper-dots .pg:not(.bg){background-image:radial-gradient(#b4bdd2 1.3px,transparent 1.6px);background-size:var(--u) var(--u);background-position:calc(var(--u)/2) calc(var(--u)/2)}
#live{pointer-events:none}
@media(max-width:700px){.ed-top select{max-width:110px}#ed-status{display:none}}

/* ===== v2: aspecto moderno ===== */
:root{
  --bg:#f4f4f6;--surface:#fff;--surface2:#f1f1f5;--line:#e8e8ee;--ink:#14141a;--muted:#70707e;
  --accent:#5b4bf5;--accent-soft:#eeecff;--radius:20px;
  --shadow:0 1px 1px rgba(20,20,40,.04),0 8px 24px -8px rgba(20,20,40,.10);
}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#0e0e12;--surface:#18181e;--surface2:#212129;--line:#2a2a33;--accent:#9188ff;--accent-soft:#25234d}}
:root[data-theme=dark]{--bg:#0e0e12;--surface:#18181e;--surface2:#212129;--line:#2a2a33;--accent:#9188ff;--accent-soft:#25234d}
body{font-family:"Inter","SF Pro Text",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased;letter-spacing:-.006em}
h1{font-size:2.15rem;font-weight:750;letter-spacing:-.035em}
h2{font-weight:700;letter-spacing:-.02em}
.ic{flex:none;display:inline-block;vertical-align:middle}
#nav{background:color-mix(in srgb,var(--surface) 82%,transparent);backdrop-filter:saturate(1.6) blur(18px);-webkit-backdrop-filter:saturate(1.6) blur(18px);border-right:1px solid var(--line)}
.brand i{background:linear-gradient(135deg,var(--accent),color-mix(in srgb,var(--accent) 55%,#e879f9));box-shadow:0 6px 16px -4px color-mix(in srgb,var(--accent) 60%,transparent);color:#fff}
.nav-i{color:var(--muted);font-weight:600;border-radius:14px}
.nav-i .em{display:grid;place-items:center}
.nav-i:hover{background:var(--surface2);color:var(--ink)}
.nav-i.on{background:var(--accent-soft);color:var(--accent)}
.nav-course{font-weight:550;min-height:40px;padding:8px 12px}
.nav-sec button{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--surface2);color:var(--ink);padding:0}
@media(max-width:900px){
  #nav{margin:0 12px calc(10px + var(--sab));inset:auto 0 0 0;border:1px solid var(--line);border-radius:26px;box-shadow:0 12px 40px -8px rgba(20,20,40,.28);padding:6px}
  .nav-i{border-radius:20px}
}
.card{border-radius:var(--radius);padding:22px;border-color:transparent;box-shadow:var(--shadow)}
.card h2{color:var(--ink);font-size:1.05rem}
.card h2 .ic{color:var(--accent)}
.btn{border-radius:14px;border-color:transparent;background:var(--surface2);font-weight:620}
.btn:hover{background:color-mix(in srgb,var(--surface2) 80%,var(--ink) 8%)}
.btn.primary{background:var(--accent);box-shadow:0 8px 20px -8px color-mix(in srgb,var(--accent) 80%,transparent)}
.btn.primary:hover{filter:brightness(1.07);background:var(--accent)}
.btn.danger{background:color-mix(in srgb,var(--danger) 10%,transparent)}
.search{border-radius:16px;border-color:transparent;box-shadow:var(--shadow);padding-left:18px}
.search:focus{outline:2px solid var(--accent)}
.course{position:relative;overflow:hidden;border-radius:22px;min-height:150px;background:linear-gradient(145deg,var(--c),color-mix(in srgb,var(--c) 62%,#1a1040));box-shadow:0 14px 28px -14px var(--c);transition:transform .2s}
.course::after{content:"";position:absolute;right:-40px;top:-40px;width:150px;height:150px;border-radius:50%;background:rgba(255,255,255,.14)}
.course:active{transform:scale(.98)}
.course h3{font-size:1.2rem;font-weight:700;letter-spacing:-.02em;position:relative;z-index:1}
.course small,.course .stats{position:relative;z-index:1}
.course .stats span{display:inline-flex;align-items:center;gap:5px;background:rgba(255,255,255,.18);padding:4px 10px;border-radius:99px}
.c-head{background:linear-gradient(145deg,var(--c),color-mix(in srgb,var(--c) 60%,#1a1040));border-radius:26px;padding:26px;position:relative;overflow:hidden}
.c-head::after{content:"";position:absolute;right:-60px;top:-70px;width:240px;height:240px;border-radius:50%;background:rgba(255,255,255,.12);pointer-events:none}
.c-head .btn{background:rgba(255,255,255,.2);backdrop-filter:blur(8px)}
.slot{display:inline-flex;align-items:center;gap:6px;position:relative;z-index:1}
.tab{border-color:transparent;background:var(--surface);gap:8px;box-shadow:var(--shadow);color:var(--muted)}
.tab small{background:var(--surface2);border-radius:99px;padding:0 8px;font-weight:700;color:var(--muted)}
.tab.on{background:var(--ink);color:var(--bg)}
.tab.on small{background:rgba(255,255,255,.2);color:inherit}
.tab .dot{margin:0 2px 0 0}
.chip{border-radius:8px;padding:3px 9px;font-weight:600;font-size:.78rem}
.chip::before{width:7px;height:7px}
.note{border-color:transparent;border-radius:20px;transition:transform .2s,box-shadow .2s}
.note:hover{transform:translateY(-2px)}
.note .thumb{height:160px}
.note .thumb p{font-size:.84rem;line-height:1.5}
.note .kind{width:30px;height:30px;display:grid;place-items:center;padding:0;border-radius:10px;color:var(--accent)}
.note .more{display:grid;place-items:center;padding:0;color:var(--ink);backdrop-filter:blur(8px);background:color-mix(in srgb,var(--surface) 85%,transparent)}
.file{border-color:transparent;border-radius:20px;box-shadow:var(--shadow)}
.file .fi{height:130px}
.ext{display:grid;place-items:center;width:64px;height:76px;border-radius:12px;background:color-mix(in srgb,var(--e) 14%,var(--surface));color:var(--e);font-weight:800;font-size:.85rem;letter-spacing:.04em;border:2px solid color-mix(in srgb,var(--e) 40%,transparent)}
.viewer .ext{margin:0 auto}
.drop{border-radius:20px;border-width:2px;background:var(--surface)}
.empty{padding:40px 16px}
.empty-ic{width:68px;height:68px;border-radius:22px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;margin:0 auto 16px}
.row{border-bottom-color:var(--line);padding:12px 4px}
.chk-b{width:30px;height:30px;border-width:2px;border-color:color-mix(in srgb,var(--muted) 45%,transparent);color:transparent}
.chk-b.on{color:#fff}
.day{border-color:transparent;border-radius:22px;box-shadow:var(--shadow)}
.day.today{box-shadow:0 0 0 2px var(--accent)}
.cls{border-radius:12px;border-left-width:4px}
.choice button{border:0;background:var(--surface2);border-radius:20px;padding:24px 10px;color:var(--ink)}
.choice button span{width:56px;height:56px;border-radius:18px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center}
.choice button:hover{background:var(--accent-soft)}
dialog{border-radius:28px}
.dlg-in input:not([type=radio]),.dlg-in select,.dlg-in textarea{border-radius:14px;border-color:transparent;background:var(--surface2)}
.dlg-in input:focus,.dlg-in select:focus,.dlg-in textarea:focus{outline:2px solid var(--accent)}
.seg{background:var(--surface2);border-radius:14px}
.seg button{display:inline-flex;align-items:center;gap:7px;color:var(--muted)}
.seg button.on{color:var(--accent)}
#toast{background:var(--ink);box-shadow:0 12px 30px -8px rgba(0,0,0,.4)}
/* editor */
.ed-top{background:color-mix(in srgb,var(--surface) 88%,transparent);backdrop-filter:blur(16px);border-bottom-color:var(--line)}
.ib{display:grid;place-items:center;padding:0;color:var(--ink)}
#ed-tools{margin:10px auto 0;width:fit-content;max-width:calc(100% - 20px);border:0;border-radius:20px;box-shadow:var(--shadow);padding:6px 8px;gap:2px}
.tl{display:inline-flex;align-items:center;gap:7px;border-radius:12px;color:var(--ink);font-weight:600}
.tl .ic{color:var(--muted)}
.tl.on{background:var(--accent-soft);border-color:transparent;color:var(--accent)}
.tl.on .ic{color:var(--accent)}
.tg{border-right-color:var(--line)}
.sw{border-color:var(--surface)}
#ed-text{border-radius:24px;margin-top:14px;box-shadow:var(--shadow)}
#ed-body{padding:0 12px}
.pg{border-radius:10px;box-shadow:0 10px 30px -10px rgba(20,20,40,.3)}
.drop{flex-wrap:wrap}

/* ===== v3: funciones ampliadas ===== */
.lbl{font-size:.85rem;font-weight:600;color:var(--muted);margin-bottom:6px}
.chkl{flex-direction:row!important;align-items:center;gap:10px!important;color:var(--ink)!important;font-size:1rem!important}
.chkl input{width:22px;height:22px;accent-color:var(--accent)}
.subrow{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.subrow input[type=text]{flex:1}
.subrow input[type=checkbox]{width:22px;height:22px;accent-color:var(--accent);flex:none}
.mini{display:inline-flex;align-items:center;gap:4px;background:var(--surface2);border-radius:6px;padding:1px 7px;font-size:.75rem;font-weight:600;color:var(--muted)}
.tagbar{display:flex;gap:8px;overflow:auto;margin-bottom:14px}
.tg-i{padding:7px 14px;border-radius:99px;background:var(--surface);box-shadow:var(--shadow);font-weight:600;font-size:.9rem;white-space:nowrap;color:var(--muted)}
.tg-i.on{background:var(--accent);color:var(--accent-ink)}
.note .tags{display:flex;gap:6px;flex-wrap:wrap}.note .tags span{font-size:.75rem;color:var(--accent);font-weight:600}
.pinb{position:absolute;top:8px;left:44px;width:30px;height:30px;border-radius:10px;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center}
.bar{height:10px;border-radius:99px;background:var(--surface2);overflow:hidden}.bar i{display:block;height:100%;border-radius:99px;background:var(--accent)}.bar.warn i{background:var(--danger)}
.ib2{padding:0;width:46px;justify-content:center}
/* notas */
.gr-sum{display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.gr-big{font-size:3.2rem;font-weight:800;letter-spacing:-.04em;line-height:1;display:flex;flex-direction:column;min-width:140px}
.gr-big small{font-size:.8rem;font-weight:600;color:var(--muted);letter-spacing:0;margin-top:6px}
.gr-info{flex:1;min-width:220px}
.gr-n{font-weight:800;font-size:1.15rem}.gr-n.low{color:var(--danger)}.gr-n.pend{font-size:.85rem;font-weight:600;color:var(--muted)}
/* tarjetas */
.home-rep{display:flex;align-items:center;gap:16px;margin-bottom:16px;flex-wrap:wrap}.home-rep .grow{flex:1;min-width:200px}
.rev-top{display:flex;align-items:center;gap:10px}
.rev-face{background:var(--surface2);border-radius:20px;padding:28px 22px;font-size:1.25rem;font-weight:600;text-align:center;min-height:130px;display:grid;place-items:center;line-height:1.4}
.rev-face.back{background:var(--accent-soft);color:var(--ink);font-weight:500}
.rev-btns{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.rev-btns button{border:0;border-radius:14px;padding:14px 4px;font-weight:700;min-height:50px;background:var(--surface2)}
.rev-btns button:nth-child(1){background:color-mix(in srgb,var(--danger) 16%,transparent);color:var(--danger)}
.rev-btns button:nth-child(3){background:color-mix(in srgb,var(--ok) 18%,transparent);color:var(--ok)}
.rev-btns button:nth-child(4){background:var(--accent-soft);color:var(--accent)}
.qz-opts{display:flex;flex-direction:column;gap:8px}
.qz-o{border:2px solid transparent;background:var(--surface2);border-radius:14px;padding:14px 16px;text-align:left;font-weight:550;min-height:52px}
.qz-o.good{background:color-mix(in srgb,var(--ok) 20%,transparent);border-color:var(--ok)}.qz-o.bad{background:color-mix(in srgb,var(--danger) 18%,transparent);border-color:var(--danger)}.qz-o.dim{opacity:.55}
/* calendario */
.cal-h,.cal-g{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}
.cal-h span{text-align:center;font-size:.8rem;font-weight:700;color:var(--muted);padding:4px}
.cal-c{background:var(--surface);border:0;border-radius:14px;min-height:96px;padding:8px;text-align:left;display:flex;flex-direction:column;gap:4px;box-shadow:var(--shadow);overflow:hidden;min-width:0}
.cal-c.out{opacity:.45}.cal-c.today .n{background:var(--accent);color:var(--accent-ink)}.cal-c.sel{outline:2px solid var(--accent)}
.cal-c .n{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:.9rem}
.cl-n{font-size:.7rem;color:var(--muted);font-weight:600}
.cal-p{display:flex;flex-direction:column;gap:3px;min-width:0}.cal-p small{color:var(--muted);font-size:.7rem}
.pill{display:block;font-size:.72rem;font-weight:600;padding:2px 7px;border-radius:6px;background:color-mix(in srgb,var(--c) 22%,var(--surface));border-left:3px solid var(--c);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pill.ex{background:color-mix(in srgb,var(--danger) 20%,var(--surface));border-left-color:var(--danger);color:var(--danger)}
.cal-w{display:grid;grid-template-columns:repeat(7,minmax(130px,1fr));gap:8px;overflow:auto}
.cal-wd{background:var(--surface);border-radius:16px;padding:10px;display:flex;flex-direction:column;gap:6px;min-height:200px;box-shadow:var(--shadow)}
.cal-wd.today{outline:2px solid var(--accent)}.cal-wd.sel{background:var(--accent-soft)}
.cal-wh{border:0;background:none;font-weight:600;text-align:left;padding:2px 0;color:var(--muted)}.cal-wh b{color:var(--ink);font-size:1.1rem}
.wt{cursor:pointer}
@media(max-width:700px){.cal-c{min-height:64px;padding:5px}.cal-p .pill{display:none}.cal-p small{display:none}}
/* estudio */
.st-card{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}
.st-phase{font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.1em;font-size:.8rem}
.st-ring{position:relative;width:min(260px,70vw);aspect-ratio:1}.st-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.st-bg{fill:none;stroke:var(--surface2);stroke-width:12}.st-fg{fill:none;stroke:var(--accent);stroke-width:12;stroke-linecap:round;transition:stroke-dashoffset .5s linear}.st-fg.brk{stroke:var(--ok)}
#st-time{position:absolute;inset:0;display:grid;place-items:center;font-size:3.2rem;font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.st-sel{display:flex;flex-direction:column;gap:5px;font-size:.8rem;font-weight:600;color:var(--muted);width:min(320px,100%);text-align:left}
.st-sel select,.fld{padding:11px 12px;border-radius:12px;border:0;background:var(--surface2);min-height:46px;color:var(--ink);font-weight:400;width:100%}
.fld:focus,.st-sel select:focus{outline:2px solid var(--accent)}
.st-stats{display:flex;gap:28px;margin-bottom:16px}.st-stats b{display:block;font-size:1.6rem;font-weight:800;letter-spacing:-.03em}.st-stats span{color:var(--muted);font-size:.85rem}
.st-bars{display:flex;gap:10px;align-items:flex-end;height:120px;margin-bottom:16px}.st-bars>div{flex:1;display:flex;flex-direction:column;align-items:center;gap:6px;height:100%;justify-content:flex-end}
.st-bars i{width:100%;border-radius:8px 8px 4px 4px;background:var(--accent-soft)}.st-bars .today i{background:var(--accent)}.st-bars span{font-size:.75rem;color:var(--muted);font-weight:600}
.st-per{display:flex;flex-direction:column;gap:10px}.st-per>div{display:grid;grid-template-columns:110px 1fr 70px;gap:10px;align-items:center;font-size:.88rem}.st-per span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.st-per b{text-align:right}
/* ajustes y sync */
.sy-ok{display:flex;align-items:center;gap:12px}.sy-dot{width:12px;height:12px;border-radius:50%;background:var(--ok);flex:none}.sy-dot.busy{background:var(--warn);animation:pulse 1s infinite}.sy-dot.err{background:var(--danger)}
@keyframes pulse{50%{opacity:.35}}
/* editor: audio, fórmulas, menú */
#ed-audio{display:flex;gap:10px;flex-wrap:wrap;align-items:center;padding:8px 14px;background:var(--surface);border-bottom:1px solid var(--line)}
#ed-audio[hidden]{display:none}
.rec-now{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--danger)}.rec-now i{width:12px;height:12px;border-radius:50%;background:var(--danger);animation:pulse 1s infinite}
.rec-i{display:flex;align-items:center;gap:8px;min-width:0}.rec-i span{font-size:.8rem;color:var(--muted);max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.rec-i audio{height:36px;max-width:260px}
.tl.rec{background:color-mix(in srgb,var(--danger) 16%,transparent)!important;color:var(--danger)!important}.tl.rec .ic{color:var(--danger)}
#ed-text .math{padding:0 3px;border-radius:6px;cursor:pointer;background:color-mix(in srgb,var(--accent) 8%,transparent)}
.math-prev{background:var(--surface2);border-radius:14px;padding:16px;min-height:64px;overflow:auto;text-align:center;font-size:1.3rem}
.snips{display:flex;flex-wrap:wrap;gap:6px}
.menu-l{display:flex;flex-direction:column;gap:8px}
.menu-l button{display:flex;gap:14px;align-items:flex-start;text-align:left;border:0;background:var(--surface2);border-radius:16px;padding:14px 16px;min-height:60px}
.menu-l button .ic{margin-top:2px;color:var(--accent)}.menu-l small{display:block;color:var(--muted);margin-top:2px;font-weight:400}
.pdfv{max-height:62dvh;overflow:auto;display:flex;flex-direction:column;gap:12px;background:var(--surface2);padding:10px;border-radius:14px}.pdfp{width:100%;height:auto;border-radius:6px;box-shadow:var(--shadow)}
@media print{
  body>*:not(#editor){display:none!important}
  .ed-top,#ed-tools,#ed-audio,#ed-pages{display:none!important}
  #editor{position:static!important;display:block!important;background:#fff!important}
  #ed-body{overflow:visible!important;padding:0!important}
  #ed-text{box-shadow:none!important;color:#000!important;background:#fff!important;max-width:none!important;padding:0!important}
  .noscroll{overflow:visible!important}
}
#main{min-width:0}
.tabs{max-width:100%;overflow-x:auto;scrollbar-width:none}.tabs::-webkit-scrollbar{display:none}
.tab{flex:none}
.btns .btn{flex:none}

.sub2{opacity:.92;font-size:.9rem;margin-top:3px;position:relative;z-index:1}