/* =========================
   ADMIN AUTH – Light/Dark
   ========================= */

/* Tema CLARO por defecto */
:root{
  --bg: #f7f9fc;
  --bg-2:#eef3f9;
  --card:#ffffff;
  --border:#e6ebf2;
  --text:#0e141b;
  --muted:#5e6b7c;
  --accent:#17448e;     /* azul marino */
  --accent-2:#f4771e;   /* naranja */
  --radius:16px;
  --shadow: 0 10px 30px rgba(9, 18, 36, .10);
}

/* Tema OSCURO (como alumnos) */
html[data-theme="dark"]{
  --bg:#0f1216;
  --bg-2:#1b1f24;
  --card: #161a20;
  --border:#242a33;
  --text:#e8edf3;
  --muted:#a9b2bd;
  --accent:#17448e;
  --accent-2:#f4771e;
  --radius:16px;
  --shadow: 0 10px 30px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.05);
}

/* Fondo */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; font-family:Inter, system-ui, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 900px at 12% 10%, var(--bg-2) 0%, var(--bg) 55%, #e8eef7 100%);
  transition: background-color .3s ease, color .3s ease, background .4s ease;
  display:grid; place-items:center; min-height:100vh;
}
html[data-theme="dark"] body{
  background: radial-gradient(1200px 900px at 10% 10%, #12151a 0%, var(--bg) 55%, #0c0f13 100%);
}

/* Tarjeta */
.box{
  width:min(460px, 92vw);
  background: var(--card);
  border:1px solid var(--border);
  border-radius: var(--radius);
  padding:22px 22px 18px;
  box-shadow: var(--shadow);
}

/* Encabezado / marca */
.head{ display:flex; align-items:center; justify-content:space-between; gap:12px; }
.brand{ display:flex; align-items:center; gap:10px; color:var(--muted); font-weight:700; }
.brand .dot{ width:12px; height:12px; border-radius:4px;
  background: conic-gradient(from 20deg, var(--accent-2), var(--accent));
  filter:drop-shadow(0 2px 8px rgba(0,0,0,.25));
  animation: spin 7s linear infinite;
}
@keyframes spin{ to{ rotate:360deg } }

.title{ margin:6px 0 2px; font-size:clamp(22px, 3.2vw, 28px); font-weight:800; letter-spacing:.2px; }
.subtitle{ margin:0 0 12px; color:var(--muted); }

/* Inputs */
.input{
  width:100%; padding:12px 14px; border-radius:12px; margin-bottom:10px;
  border:1px solid var(--border); background: #f5f8fd; color:var(--text);
  transition:border-color .25s, box-shadow .25s, background .25s;
}
.input::placeholder{ color: color-mix(in srgb, var(--muted) 80%, white 0%); }
html[data-theme="dark"] .input{ background:#0f141a; }
.input:focus{
  outline:none;
  border-color: color-mix(in srgb, var(--accent-2) 60%, white 0%);
  box-shadow: 0 0 0 6px rgba(244,119,30,.12);
}

/* Fila secundaria */
.row{ display:flex; align-items:center; justify-content:space-between; margin:8px 0 14px; }
.link{ color: color-mix(in srgb, var(--accent) 72%, var(--accent-2) 28%); text-decoration:none; }
.link:hover{ text-decoration:underline; }

/* Botón principal */
.btn{
  width:100%; padding:12px 16px; border:none; border-radius:12px; cursor:pointer;
  background: linear-gradient(135deg, var(--accent-2), #ff983f);
  color:#1a1b1c; font-weight:800; letter-spacing:.2px;
  transition: transform .2s ease, filter .2s ease;
}
.btn:hover{ transform: translateY(-1px); filter: brightness(1.03); }
.btn:active{ transform: translateY(0); }

/* Alertas */
.alert{
  background: #fff3f3; border:1px solid #ffd3d3; color:#7b1414;
  padding:10px 12px; border-radius:12px; margin-bottom:10px;
}
html[data-theme="dark"] .alert{
  background:#261A1A; border-color:#4a2727; color:#ffd0d0;
}

/* Pie */
.footer{ text-align:center; color:var(--muted); font-size:12px; margin-top:12px; }

/* ---------- Toggle de tema (animado) ---------- */
.theme-toggle{
  --w: 66px; --h: 32px; --p: 3px;
  position:relative; display:inline-flex; align-items:center; gap:10px;
  padding:6px 0; background:transparent; border:none; cursor:pointer; color:var(--muted);
  font-weight:700;
}
.theme-toggle__label{ min-width:54px; text-align:right; }
.theme-toggle__track{
  width:var(--w); height:var(--h); border-radius:999px; position:relative;
  background: linear-gradient(180deg, #dde6f6, #cfdaf0);
  border: 1px solid #c7d4ea; display:inline-block;
  transition: background .3s ease, border-color .3s ease;
}
.theme-toggle__thumb{
  position:absolute; top:var(--p); left:var(--p);
  width: calc(var(--h) - var(--p)*2); height: calc(var(--h) - var(--p)*2);
  border-radius:50%; background:#ffffff; box-shadow: 0 2px 8px rgba(0,0,0,.15);
  display:grid; place-items:center;
  transition: transform .28s cubic-bezier(.2,.7,.2,1), background .3s ease, box-shadow .3s ease;
}
.theme-toggle__icon{ width:18px; height:18px; color:#9aa9c3; transition: color .3s, rotate .4s; }

/* Estado oscuro: desliza a la derecha y cambia colores */
html[data-theme="dark"] .theme-toggle__track{
  background: linear-gradient(180deg, #263040, #1b2432);
  border-color:#2f3a4d;
}
html[data-theme="dark"] .theme-toggle__thumb{
  transform: translateX(calc(var(--w) - var(--h)));
  background:#0e141b; box-shadow: 0 2px 10px rgba(0,0,0,.35);
}
html[data-theme="dark"] .theme-toggle__icon{
  color:#e7edf7; rotate: 180deg;
}