:root{
  --bg:#0e0f12;
  --bg2:#14161b;
  --card:#1b1f27;
  --card2:#11141a;
  --text:#e6e6e6;
  --muted:#a8acb3;
  --accent:#4da3ff;
  --accent2:#7fffd4;
  --danger:#ff5c5c;
  --ok:#39d98a;
  --radius:14px;
  --shadow: 0 8px 24px rgba(0,0,0,.35);
}

*{box-sizing:border-box}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background:var(--bg);
  color:var(--text);
  animation: fadeIn .18s ease;
}

@keyframes fadeIn{
  from{opacity:.6; transform:translateY(3px)}
  to{opacity:1; transform:none}
}

/* -------------------- TOPBAR -------------------- */
.topbar{
  position:sticky; top:0; z-index:10;
  background:linear-gradient(180deg,#0b0c10,#111318);
  padding:10px 14px;
  border-bottom:1px solid #222;
  display:flex;
  align-items:center;
  gap:12px;
}
.topbar .logo{width:42px;height:42px;object-fit:contain;border-radius:10px;background:var(--card2);padding:4px;}
.topbar .title{display:flex;flex-direction:column;line-height:1.1;}
.topbar h1{margin:0;font-size:18px;}
.topbar p{margin:2px 0 0;color:var(--muted);font-size:12px;}

.container{padding:12px;max-width:900px;margin:0 auto;}

/* -------------------- CARDS -------------------- */
.card{
  background:var(--card);
  border:1px solid #252a33;
  border-radius:var(--radius);
  padding:12px;
  margin:10px 0;
  box-shadow:var(--shadow);
  animation: pop .12s ease;
}
@keyframes pop{
  from{transform:scale(.98);opacity:.7}
  to{transform:scale(1);opacity:1}
}

h2{margin:0 0 8px 0;font-size:18px;}
h3{margin:0 0 6px 0;font-size:16px;}

label{display:block;font-size:13px;color:var(--muted);margin-top:8px;}
input, select{
  width:100%;padding:10px;margin-top:6px;
  border-radius:10px;border:1px solid #2b2f38;
  background:#0c0e12;color:var(--text);font-size:16px;
}

/* Bug visual iOS */
input[type="date"]{
  -webkit-appearance:none;
  background:var(--card);
  border:1px solid #333;
  border-radius:12px;
  padding:12px;
  color:white;
  overflow:hidden;
}

/* -------------------- BUTTONS -------------------- */
button{
  padding:11px 12px;
  border-radius:12px;
  border:1px solid transparent;
  background:#22262e;
  color:var(--text);
  font-size:15px;
  cursor:pointer;
  box-shadow:0 4px 12px rgba(0,0,0,.25);
  transition:.08s;
}
button:active{transform:scale(.98);opacity:.9;}
button.primary{background:var(--accent);color:#00121f;font-weight:800;}
button.ghost{background:transparent;border:1px dashed #3a3f49;color:var(--muted);}
button.danger{background:var(--danger);color:#220;font-weight:800;}
button.full{width:100%;margin-top:10px;}

.row{display:flex;align-items:center;gap:8px;}
.row.space{justify-content:space-between;}

.list{display:flex;flex-direction:column;gap:8px;margin-top:8px;}
.item{
  display:flex;align-items:center;justify-content:space-between;
  background:#0c0e12;border:1px solid #2b2f38;border-radius:10px;
  padding:10px;
}
.item .meta{color:var(--muted);font-size:13px;}

.badge{padding:4px 8px;border-radius:999px;font-size:12px;background:#0c0e12;border:1px solid #2b2f38;color:var(--muted);}
.small{font-size:13px;color:var(--muted);}
hr{border:0;border-top:1px solid #2b2f38;margin:10px 0;}

/* -------------------- ALUMNOS LIST -------------------- */

.linea-asistencia {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-right:6px;
}
.linea-asistencia .texto{
  width:60%;
  display:flex;
  flex-direction:column;
}
.linea-asistencia .check{
  width:10%;
  display:flex;
  justify-content:center;
}
.linea-asistencia .acciones{
  width:30%;
  display:flex;
  gap:6px;
  justify-content:flex-end;
}
.linea-asistencia b{font-size:1.1rem;}


/* -------------------- CALENDARIO (VERSIÓN FINAL) -------------------- */

.cal-container{
  margin-top:20px;
  padding:20px;
  background:#0f1114;
  border-radius:14px;
  border:1px solid #22252b;
}

.calendario{
  width:100%;
  display:grid;
  grid-template-columns:repeat(7,1fr);
  gap:8px;
  margin-top:12px;
}

.cal-dia-nombre{
  text-align:center;
  font-size:14px;
  color:#aaa;
  padding-bottom:6px;
}

.dia{
  padding:18px 0;
  text-align:center;
  background:#111317;
  border-radius:10px;
  cursor:pointer;
  border:1px solid #1e2228;
  color:#eee;
  font-size:16px;
  transition:.15s;
}

.dia:hover{background:#1d2026;}
.dia.conClase{
  background:#0066ff33;
  border-color:#0a84ff;
  color:#dbe8ff;
  font-weight:600;
}
.dia.vacio{
  background:transparent;
  border:none;
  cursor:default;
}

/* -------------------- MODAL -------------------- */
.modal-bg{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.6);
  display:flex;
  align-items:center;
  justify-content:center;
  padding:20px;
  z-index:9999;
}
.modal{
  background:#1a1d22;
  padding:20px;
  border-radius:12px;
  width:100%;
  max-width:420px;
}