/* =====================================================================
   SICRO · Sistema de diseño
   Dirección: ligero, fresco, moderno y universitario.
   Paleta: papel claro #F6F9FC · tinta #17263B · azul rectoría #1D4E9E
           oro león #F2B028 · verde acierto #16A07C · coral #E4573D
   Tipografía: Lexend (títulos) + Public Sans (texto)
   Firma visual: listón institucional (franja degradada azul→oro)
   ===================================================================== */

:root{
  --paper:#F6F9FC; --card:#FFFFFF; --ink:#17263B; --ink-soft:#5A6B85;
  --line:#E3EAF3; --blue:#1D4E9E; --blue-deep:#153C7C; --blue-tint:#EAF1FB;
  --gold:#F2B028; --gold-tint:#FDF3DC; --ok:#16A07C; --ok-tint:#E4F6F0;
  --warn:#D98A1F; --warn-tint:#FBF0DC; --bad:#E4573D; --bad-tint:#FCEAE6;
  --r:14px; --shadow:0 1px 2px rgba(23,38,59,.05),0 8px 24px -12px rgba(29,78,158,.18);
  --font-d:'Lexend',sans-serif; --font-b:'Public Sans',sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--paper);color:var(--ink);font:15px/1.55 var(--font-b);-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--font-d);letter-spacing:-.015em;margin:0 0 .35em}
h1{font-size:1.55rem;font-weight:600}
h2{font-size:1.15rem;font-weight:600}
p{margin:.3em 0}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
small{color:var(--ink-soft)}

/* Listón institucional (firma) */
.ribbon{height:5px;background:linear-gradient(90deg,var(--blue-deep) 0%,var(--blue) 55%,var(--gold) 100%)}

/* ---------- Estructura admin ---------- */
.shell{display:flex;min-height:calc(100vh - 5px)}
.side{width:248px;flex-shrink:0;background:var(--card);border-right:1px solid var(--line);
      display:flex;flex-direction:column;padding:20px 14px;position:sticky;top:0;height:calc(100vh - 5px)}
.side nav{flex:1;margin-top:18px;overflow-y:auto}
.side-link{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:10px;
           color:var(--ink-soft);font-weight:500;font-size:.92rem;margin-bottom:2px}
.side-link .dot{width:7px;height:7px;border-radius:50%;background:var(--line);transition:.15s}
.side-link:hover{background:var(--blue-tint);color:var(--blue);text-decoration:none}
.side-link.on{background:var(--blue-tint);color:var(--blue-deep);font-weight:600}
.side-link.on .dot{background:var(--gold)}
.side-user{border-top:1px solid var(--line);padding-top:14px;display:flex;align-items:center;gap:10px}
.side-user-txt{flex:1;min-width:0}
.side-user-txt strong{display:block;font-size:.85rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--blue-tint);color:var(--blue-deep);
        display:flex;align-items:center;justify-content:center;font-family:var(--font-d);font-weight:600}
.main{flex:1;padding:30px 36px;max-width:1200px}

/* ---------- Marca ---------- */
.brand{display:flex;align-items:center;gap:11px}
.brand strong{font-family:var(--font-d);font-size:1.05rem;display:block;line-height:1.1}
.brand small{display:block;font-size:.72rem;color:var(--ink-soft)}
.brand-seal{width:38px;height:38px;border-radius:12px;flex-shrink:0;
  background:linear-gradient(135deg,var(--blue) 0%,var(--blue-deep) 70%);
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-d);font-weight:700;font-size:1.15rem;
  box-shadow:inset 0 -3px 0 var(--gold)}

/* ---------- Área alumno ---------- */
.stu-header{display:flex;justify-content:space-between;align-items:center;
  background:var(--card);border-bottom:1px solid var(--line);padding:14px 26px}
.stu-header-user{display:flex;align-items:center;gap:14px;font-weight:500}
.stu-main{max-width:900px;margin:0 auto;padding:32px 22px}

/* ---------- Tarjetas ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
      box-shadow:var(--shadow);padding:22px 24px;margin-bottom:20px}
.card-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;gap:12px;flex-wrap:wrap}
.grid{display:grid;gap:16px}
.grid-4{grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px;box-shadow:var(--shadow)}
.kpi b{font-family:var(--font-d);font-size:1.9rem;font-weight:600;display:block;line-height:1.1}
.kpi span{color:var(--ink-soft);font-size:.85rem}
.kpi.k-gold b{color:var(--warn)} .kpi.k-blue b{color:var(--blue)} .kpi.k-ok b{color:var(--ok)}

/* ---------- Chips y avance ---------- */
.chip{display:inline-block;padding:3px 11px;border-radius:999px;font-size:.76rem;font-weight:600;white-space:nowrap}
.chip-ok{background:var(--ok-tint);color:var(--ok)}
.chip-info{background:var(--blue-tint);color:var(--blue-deep)}
.chip-gold{background:var(--gold-tint);color:#9A6E0B}
.chip-warn{background:var(--warn-tint);color:var(--warn)}
.chip-off{background:#EEF1F5;color:var(--ink-soft)}
.chip-bad{background:var(--bad-tint);color:var(--bad)}
.prog{display:inline-block;width:110px;height:7px;border-radius:99px;background:var(--line);vertical-align:middle;overflow:hidden}
.prog-fill{height:100%;border-radius:99px;background:linear-gradient(90deg,var(--blue),var(--ok))}
.prog-num{font-size:.78rem;color:var(--ink-soft);margin-left:7px}

/* ---------- Tablas ---------- */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th{font-family:var(--font-d);font-weight:600;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;
   color:var(--ink-soft);text-align:left;padding:10px 12px;border-bottom:2px solid var(--line)}
th a{color:var(--ink-soft)}
td{padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
tr:hover td{background:#FAFCFE}
.td-actions{white-space:nowrap;display:flex;gap:6px;flex-wrap:wrap}

/* ---------- Formularios ---------- */
label{display:block;font-weight:600;font-size:.85rem;margin-bottom:5px}
.hint{font-size:.78rem;color:var(--ink-soft);margin-top:4px}
input[type=text],input[type=password],input[type=number],input[type=date],select,textarea{
  width:100%;padding:10px 13px;border:1.5px solid var(--line);border-radius:10px;
  font:inherit;background:#fff;color:var(--ink);transition:border-color .15s,box-shadow .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-tint)}
.field{margin-bottom:16px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:0 20px}
.pwd-wrap{position:relative}
.pwd-toggle{position:absolute;right:8px;top:50%;transform:translateY(-50%);border:none;background:none;
  color:var(--blue);font-weight:600;font-size:.78rem;cursor:pointer;padding:4px 6px}

/* ---------- Botones ---------- */
.btn{display:inline-block;border:none;border-radius:10px;padding:10px 18px;font:600 .9rem var(--font-b);
     cursor:pointer;transition:.15s;text-decoration:none !important}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-deep)}
.btn-gold{background:var(--gold);color:#4A3402}
.btn-gold:hover{filter:brightness(.95)}
.btn-danger{background:var(--bad-tint);color:var(--bad)}
.btn-danger:hover{background:var(--bad);color:#fff}
.btn-ghost{background:transparent;color:var(--blue);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--blue);background:var(--blue-tint)}
.btn-sm{padding:5px 11px;font-size:.78rem;border-radius:8px}
.btn:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:2px}

/* ---------- Alertas ---------- */
.alert{border-radius:12px;padding:12px 16px;margin-bottom:18px;font-weight:500;font-size:.9rem}
.alert-ok{background:var(--ok-tint);color:#0C6E54;border:1px solid #BFE8DB}
.alert-error{background:var(--bad-tint);color:#A93A26;border:1px solid #F4C9C0}
.alert-info{background:var(--blue-tint);color:var(--blue-deep);border:1px solid #CCDCF4}

/* ---------- Acceso (login) ---------- */
.login-wrap{min-height:calc(100vh - 5px);display:grid;grid-template-columns:1fr 1fr}
.login-hero{background:linear-gradient(160deg,var(--blue-deep) 0%,var(--blue) 62%,#2E6BC4 100%);
  color:#fff;display:flex;flex-direction:column;justify-content:center;padding:60px;position:relative;overflow:hidden}
.login-hero::after{content:'';position:absolute;right:-120px;bottom:-120px;width:340px;height:340px;
  border-radius:50%;border:44px solid rgba(242,176,40,.28)}
.login-hero h1{font-size:2rem;font-weight:600;color:#fff;max-width:420px}
.login-hero p{color:#CFE0F7;max-width:400px}
.login-hero .brand strong,.login-hero .brand small{color:#fff}
.login-panel{display:flex;align-items:center;justify-content:center;padding:40px 24px}
.login-card{width:100%;max-width:400px}
.login-note{background:var(--gold-tint);border:1px solid #F3DFAE;border-radius:12px;
  padding:11px 14px;font-size:.82rem;color:#7A5A10;margin-top:18px}
@media (max-width:820px){.login-wrap{grid-template-columns:1fr}.login-hero{padding:36px 26px;min-height:200px}}

/* ---------- Utilidades ---------- */
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:end;margin-bottom:16px}
.toolbar .field{margin-bottom:0;min-width:160px;flex:1}
.pager{display:flex;gap:6px;margin-top:16px}
.pager a,.pager span{padding:5px 11px;border-radius:8px;border:1px solid var(--line);font-size:.85rem}
.pager .cur{background:var(--blue);color:#fff;border-color:var(--blue)}
.deflist{display:grid;grid-template-columns:220px 1fr;row-gap:11px;font-size:.93rem}
.deflist dt{color:var(--ink-soft);font-weight:500}
.deflist dd{margin:0;font-weight:500}
.foot{text-align:center;color:var(--ink-soft);font-size:.78rem;padding:24px}
.muted{color:var(--ink-soft)}
.mb0{margin-bottom:0}
@media (max-width:900px){
  .shell{flex-direction:column}
  .side{width:100%;height:auto;position:static;flex-direction:column}
  .main{padding:20px 16px}
  .deflist{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){*{transition:none !important}}