/* Nix SMR — hoja de estilo
   Sistema visual: tema oscuro cálido (naranja zorro), superficies elevadas,
   tipografía del sistema, foco claro y responsive con barra inferior en móvil. */

:root{
  /* superficies */
  --bg:#0a0c11;
  --bg-2:#0e1117;
  --surface:#141823;
  --surface-2:#1b2030;
  --surface-3:#232a3b;
  --line:#28303f;
  --line-soft:#1e2531;

  /* texto */
  --fg:#eef1f7;
  --fg-2:#c3cada;
  --muted:#8f9ab0;
  --faint:#66708a;

  /* acentos */
  --accent:#ff8a3d;
  --accent-2:#ffa869;
  --accent-soft:rgba(255,138,61,.14);
  --info:#5b8cff;
  --info-soft:rgba(91,140,255,.14);
  --ok:#34d399;
  --ok-soft:rgba(52,211,153,.14);
  --warn:#fbbf24;
  --warn-soft:rgba(251,191,36,.14);
  --err:#f26d6d;
  --err-soft:rgba(242,109,109,.14);

  /* forma */
  --r:16px;
  --r-sm:10px;
  --r-xs:8px;
  --shadow:0 12px 34px rgba(0,0,0,.42);
  --shadow-sm:0 4px 14px rgba(0,0,0,.3);
  --ring:0 0 0 3px rgba(255,138,61,.28);

  --sidebar:264px;
  --top:60px;
  --safe-top:env(safe-area-inset-top,0px);
  --safe-bottom:env(safe-area-inset-bottom,0px);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;height:100%}
body{
  background:
    radial-gradient(1100px 700px at 100% -10%, rgba(255,138,61,.07), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(91,140,255,.07), transparent 55%),
    var(--bg);
  color:var(--fg);
  font:15px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:-.01em}
h3{font-size:15px;color:var(--fg-2);text-transform:uppercase;letter-spacing:.08em;font-weight:600}
::selection{background:var(--accent-soft)}
*{scrollbar-width:thin;scrollbar-color:var(--surface-3) transparent}
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-thumb{background:var(--surface-3);border-radius:8px;border:2px solid transparent;background-clip:content-box}
*::-webkit-scrollbar-thumb:hover{background:var(--line)}

/* ---------------------------------------------------------------- layout */
#app{
  display:grid;
  grid-template-columns:var(--sidebar) 1fr;
  grid-template-rows:var(--top) 1fr;
  height:100vh;height:100dvh;
}
.topbar{
  grid-column:1/3;display:flex;align-items:center;gap:14px;
  padding:0 18px;padding-top:var(--safe-top);
  background:rgba(16,19,27,.82);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line-soft);
  z-index:20;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;letter-spacing:-.01em}
.brand .fox{font-size:20px;filter:drop-shadow(0 2px 6px rgba(255,138,61,.4))}
.brand small{color:var(--faint);font-weight:500;font-size:12px;margin-left:2px}
.top-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.chip{background:var(--surface-2);border:1px solid var(--line);border-radius:999px;padding:5px 12px;color:var(--fg-2);font-size:13px}
.icon-btn{
  background:var(--surface-2);border:1px solid var(--line);color:var(--fg);
  border-radius:var(--r-sm);width:38px;height:38px;font-size:16px;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;transition:.15s;
}
.icon-btn:hover{background:var(--surface-3);border-color:var(--line)}
.icon-btn:active{transform:translateY(1px)}

.sidebar{
  background:linear-gradient(180deg,rgba(20,24,35,.7),rgba(14,17,23,.7));
  border-right:1px solid var(--line-soft);overflow:auto;padding:14px 12px;
}
.sidebar nav{display:flex;flex-direction:column;gap:2px}
.sidebar nav a{
  display:flex;align-items:center;gap:11px;padding:9px 12px;border-radius:var(--r-sm);
  color:var(--fg-2);text-decoration:none;cursor:pointer;font-size:14px;font-weight:500;
  position:relative;transition:.14s;
}
.sidebar nav a:hover{background:var(--surface-2);color:var(--fg)}
.sidebar nav a.active{background:var(--accent-soft);color:#fff}
.sidebar nav a.active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:0 3px 3px 0;background:var(--accent);
}
.sidebar nav a .g{font-size:16px;width:20px;text-align:center;flex:none}
.sidebar nav a .pill-count{
  margin-left:auto;background:var(--surface-3);border:1px solid var(--line);
  border-radius:999px;font-size:11px;color:var(--muted);padding:1px 8px;font-weight:600;
}
.nav-sep{color:var(--faint);font-size:11px;text-transform:uppercase;letter-spacing:.1em;
  margin:16px 12px 6px;font-weight:600}

main{overflow:auto;padding:22px 26px 90px;scroll-behavior:smooth;min-width:0}
.wrap{max-width:1180px;margin:0 auto;min-width:0}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;color:var(--faint);margin-bottom:14px;font-size:13px}
.crumb a{cursor:pointer;color:var(--fg-2);text-decoration:none;padding:2px 6px;border-radius:var(--r-xs);transition:.12s}
.crumb a:hover{background:var(--surface-2);color:var(--accent)}
.crumb .sep{opacity:.5}

/* ---------------------------------------------------------------- botones */
.tbtn,.btn,.pill-btn{
  font:inherit;cursor:pointer;border-radius:var(--r-sm);border:1px solid var(--line);
  background:var(--surface-2);color:var(--fg);padding:9px 14px;font-size:14px;font-weight:550;
  display:inline-flex;align-items:center;gap:7px;transition:.14s;white-space:nowrap;
}
.tbtn:hover,.pill-btn:hover{background:var(--surface-3);border-color:var(--line)}
.tbtn:active,.btn:active{transform:translateY(1px)}
.tbtn.primary,.btn{background:linear-gradient(180deg,var(--accent-2),var(--accent));color:#1c1204;border-color:transparent;font-weight:650;box-shadow:0 6px 18px rgba(255,138,61,.24)}
.tbtn.primary:hover,.btn:hover{filter:brightness(1.05)}
.btn.sec{background:var(--surface-2);color:var(--fg);border:1px solid var(--line);box-shadow:none;font-weight:550}
.btn.sec:hover{background:var(--surface-3)}
.btn.danger{background:var(--err);color:#fff;box-shadow:none}
.btn.ghost{background:transparent;border-color:transparent;color:var(--muted);box-shadow:none}
.btn.ghost:hover{background:var(--surface-2);color:var(--fg)}
.tbtn.sm,.btn.sm{padding:6px 10px;font-size:13px}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:none;box-shadow:var(--ring);
}

.toolbar{display:flex;gap:9px;align-items:center;margin-bottom:18px;flex-wrap:wrap}
.spacer{flex:1}
.quick{
  background:var(--surface-2);border:1px solid var(--line);color:var(--fg);
  border-radius:var(--r-sm);padding:9px 14px;min-width:190px;transition:.15s;
}
.quick::placeholder{color:var(--faint)}
.quick:hover{border-color:var(--line)}
.quick:focus{border-color:var(--accent);box-shadow:var(--ring)}

/* ---------------------------------------------------------------- campos */
label.f{display:block;margin:14px 0 6px;color:var(--muted);font-size:12px;font-weight:600;
  text-transform:uppercase;letter-spacing:.05em}
input.f,select.f,textarea.f{
  width:100%;background:var(--surface-2);border:1px solid var(--line);color:var(--fg);
  border-radius:var(--r-sm);padding:10px 12px;font:inherit;transition:.15s;
}
input.f:focus,select.f:focus,textarea.f:focus{border-color:var(--accent);box-shadow:var(--ring)}
textarea.f{resize:vertical;min-height:80px}
select.f{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);
  background-position:calc(100% - 18px) 50%,calc(100% - 13px) 50%;background-size:5px 5px,5px 5px;background-repeat:no-repeat;padding-right:34px}

/* ---------------------------------------------------------------- contenido */
.content{display:grid;gap:16px;min-width:0}
.section-head{display:flex;align-items:center;gap:12px;margin:2px 0}
.section-head h3{flex:1}
.sub{color:var(--muted);font-size:12.5px}

/* tarjetas de estadística */
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px;min-width:0}
.tile{
  background:linear-gradient(160deg,var(--surface),var(--bg-2));
  border:1px solid var(--line-soft);border-radius:var(--r);padding:18px;min-width:0;
  display:flex;flex-direction:column;gap:6px;position:relative;overflow:hidden;transition:.18s;
}
.tile::after{content:"";position:absolute;inset:0;border-radius:var(--r);pointer-events:none;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}
.tile:hover{border-color:var(--line);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.tile .ic{font-size:22px}
.tile .big{font-size:30px;font-weight:750;letter-spacing:-.02em;line-height:1.1}
.tile .lbl{color:var(--muted);font-size:12.5px;font-weight:500}
.tile.clickable{cursor:pointer}

/* tarjetas genéricas */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px;min-width:0}
.card{
  background:linear-gradient(160deg,var(--surface),var(--bg-2));
  border:1px solid var(--line-soft);border-radius:var(--r);padding:16px;cursor:pointer;
  transition:.18s;position:relative;min-width:0;
}
.card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.card .big{font-size:26px}
.card .t{font-weight:650;margin-top:8px}
.card .s{color:var(--muted);font-size:12.5px;margin-top:2px}

/* rejilla de dos columnas usada en Inicio */
.grid-2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;min-width:0}

/* listas */
.list{display:grid;gap:8px;grid-template-columns:minmax(0,1fr);min-width:0}
.row{
  display:flex;align-items:center;gap:14px;padding:13px 15px;min-width:0;
  background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-sm);
  cursor:pointer;transition:.15s;position:relative;
}
.row:hover{border-color:var(--line);background:var(--surface-2);transform:translateX(2px)}
.row .ic{font-size:20px;width:28px;text-align:center;flex:none}
.row .nm{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:520}
.row .nm .sub{margin-top:2px;display:block;overflow:hidden;text-overflow:ellipsis}
.row .acts{display:flex;gap:2px;opacity:0;transition:.15s}
.row:hover .acts,.row:focus-within .acts{opacity:1}
.row .acts button{
  background:transparent;border:0;color:var(--muted);cursor:pointer;font-size:15px;padding:6px;
  border-radius:var(--r-xs);transition:.12s;
}
.row .acts button:hover{color:var(--fg);background:var(--surface-3)}
@media(hover:none){.row .acts{opacity:.8}}

/* pills / badges / chips */
.pill,.badge{
  display:inline-flex;align-items:center;gap:5px;border-radius:999px;padding:3px 10px;
  font-size:11.5px;font-weight:600;border:1px solid var(--line);background:var(--surface-2);color:var(--muted);
}
.badge{border-radius:var(--r-xs)}
.pill.pendiente{background:var(--warn-soft);color:#ffd479;border-color:transparent}
.pill.en_progreso{background:var(--info-soft);color:#9dbaff;border-color:transparent}
.pill.lista{background:var(--ok-soft);color:#7ff0c2;border-color:transparent}
.pill.entregada{background:var(--surface-3);color:var(--fg-2);border-color:transparent}
.pill.archivada{background:var(--surface-2);color:var(--faint);border-color:transparent}
.pill.vencida{background:var(--err-soft);color:#ffa3a3;border-color:transparent}

.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip-btn{
  background:var(--surface-2);border:1px solid var(--line);color:var(--muted);border-radius:999px;
  padding:7px 14px;font:inherit;font-size:13px;font-weight:550;cursor:pointer;transition:.14s;
  display:inline-flex;align-items:center;gap:7px;
}
.chip-btn:hover{color:var(--fg);border-color:var(--line)}
.chip-btn.on{background:var(--accent-soft);color:#ffd0ac;border-color:transparent}
.chip-btn .dot{width:8px;height:8px;border-radius:50%;background:currentColor;opacity:.85}

/* ---------------------------------------------------------------- panel lateral */
.panel{
  position:fixed;top:0;right:0;height:100%;width:min(480px,94vw);background:var(--surface);
  border-left:1px solid var(--line);z-index:40;display:flex;flex-direction:column;
  box-shadow:-24px 0 60px rgba(0,0,0,.55);animation:slideIn .22s ease;
}
@keyframes slideIn{from{transform:translateX(28px);opacity:.4}to{transform:none;opacity:1}}
.panel-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;
  border-bottom:1px solid var(--line-soft);gap:10px}
.panel-head #panelTitle{font-weight:650;font-size:15px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.panel-body{padding:18px;overflow:auto;flex:1}
.overlay{position:fixed;inset:0;background:rgba(6,8,12,.62);backdrop-filter:blur(2px);z-index:30;animation:fade .2s}
@keyframes fade{from{opacity:0}to{opacity:1}}
.hidden{display:none!important}

/* ---------------------------------------------------------------- toast */
.toast{
  position:fixed;left:50%;bottom:calc(24px + var(--safe-bottom));transform:translateX(-50%);
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:12px 18px;z-index:60;box-shadow:var(--shadow);font-size:14px;max-width:90vw;
  animation:toastIn .2s ease;
}
@keyframes toastIn{from{transform:translate(-50%,10px);opacity:0}to{transform:translate(-50%,0);opacity:1}}
.toast.err{border-color:var(--err);color:#ffc4c4}
.toast.ok{border-color:var(--ok);color:#b6f3d8}

/* ---------------------------------------------------------------- detalle */
.preview img{max-width:100%;border-radius:var(--r-sm);border:1px solid var(--line-soft)}
.preview pre{white-space:pre-wrap;background:var(--bg-2);padding:14px;border-radius:var(--r-sm);
  max-height:52vh;overflow:auto;border:1px solid var(--line-soft);font-size:13px;line-height:1.5}
.ver{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 2px;
  border-bottom:1px solid var(--line-soft);font-size:13px}
.ver:last-child{border-bottom:0}

/* ---------------------------------------------------------------- calendario */
.cal-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.cal-month{flex:1;text-align:center;font-weight:650;font-size:16px;text-transform:capitalize}
.cal-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px;margin-top:8px;min-width:0}
.cal-dow{text-align:center;color:var(--faint);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;padding:6px 0}
.cal-cell{
  min-height:74px;min-width:0;overflow:hidden;background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--r-sm);
  padding:7px;display:flex;flex-direction:column;gap:4px;transition:.14s;position:relative;
}
.cal-cell.pad{background:transparent;border-color:transparent}
.cal-cell.today{border-color:var(--accent);background:var(--accent-soft)}
.cal-cell.has{cursor:pointer}
.cal-cell.has:hover{border-color:var(--accent);transform:translateY(-1px)}
.cal-cell .d{font-size:12px;color:var(--muted);font-weight:600}
.cal-cell.today .d{color:var(--accent)}
.cal-ev{font-size:10.5px;line-height:1.3;padding:2px 6px;border-radius:6px;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap;font-weight:550}
.cal-ev.tareas{background:var(--info-soft);color:#a9c4ff}
.cal-ev.examenes{background:var(--err-soft);color:#ffb0b0}
.cal-ev.horario{background:var(--surface-3);color:var(--fg-2)}
.cal-ev.more{background:transparent;color:var(--faint);padding-left:6px}
.agenda{days:1}
.ag-day{margin-bottom:16px}
.ag-day .h{font-size:12.5px;color:var(--muted);font-weight:600;margin-bottom:8px;text-transform:capitalize}
.ag-day .h.today{color:var(--accent)}
.ag-ev{display:flex;gap:12px;align-items:stretch;margin-bottom:6px}
.ag-time{width:52px;flex:none;text-align:right;color:var(--faint);font-size:12px;padding-top:12px;font-variant-numeric:tabular-nums}
.ag-body{flex:1}
.ev-row{display:flex;align-items:center;gap:11px;padding:12px 14px;background:var(--surface);
  border:1px solid var(--line-soft);border-radius:var(--r-sm);border-left:3px solid var(--line);cursor:pointer;transition:.14s}
.ev-row:hover{background:var(--surface-2);transform:translateX(2px)}
.ev-row.tareas{border-left-color:var(--info)}
.ev-row.examenes{border-left-color:var(--err)}
.ev-row.horario{border-left-color:var(--surface-3)}

/* ---------------------------------------------------------------- estados */
.empty{color:var(--muted);text-align:center;padding:52px 20px;border:1px dashed var(--line);
  border-radius:var(--r);background:rgba(20,24,35,.35)}
.empty .ic{font-size:34px;display:block;margin-bottom:10px;opacity:.8}
.empty b{color:var(--fg-2)}
.skeleton{background:linear-gradient(90deg,var(--surface) 25%,var(--surface-2) 37%,var(--surface) 63%);
  background-size:400% 100%;animation:shimmer 1.4s infinite;border-radius:var(--r-sm);height:52px;border:1px solid var(--line-soft)}
@keyframes shimmer{from{background-position:100% 0}to{background-position:0 0}}

/* ---------------------------------------------------------------- login */
.login{max-width:400px;margin:14vh auto;text-align:center;background:linear-gradient(160deg,var(--surface),var(--bg-2));
  border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow)}
.login .fox{font-size:52px;filter:drop-shadow(0 4px 14px rgba(255,138,61,.45))}

/* ---------------------------------------------------------------- móvil */
.bottom-nav{display:none}
@media(max-width:860px){
  #app{grid-template-columns:minmax(0,1fr)}
  .topbar{grid-column:1;padding:0 12px;gap:10px;min-width:0}
  .top-actions{flex:none;gap:6px}
  .top-actions .quick{display:none}
  #userChip{display:none}
  .brand{min-width:0;overflow:hidden;white-space:nowrap}
  .brand small{display:none}
  .sidebar{position:fixed;top:var(--top);bottom:0;left:0;width:272px;z-index:35;
    transform:translateX(-104%);transition:transform .22s ease;box-shadow:var(--shadow)}
  .sidebar.open{transform:none}
  main{grid-column:1;padding:16px 14px 96px}
  .bottom-nav{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:25;
    background:rgba(16,19,27,.94);backdrop-filter:blur(12px);
    border-top:1px solid var(--line-soft);padding:6px 4px calc(6px + var(--safe-bottom));
  }
  .bottom-nav a{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 0;
    color:var(--faint);font-size:10.5px;font-weight:600;cursor:pointer;text-decoration:none;border-radius:var(--r-sm)}
  .bottom-nav a .g{font-size:19px}
  .bottom-nav a.active{color:var(--accent)}
  .cal-cell{min-height:58px}
  .row .acts{opacity:.85}
}
@media(min-width:861px){.bottom-nav{display:none}}