/* =========================
   Tema base y variables
   ========================= */
:root{
  --bg: #f4f7fb;
  --card: #ffffff;
  --text: #1b2533;
  --muted: #6b7a90;

  --primary: #3c7cff;     /* Botones primarios */
  --primary-600:#2d66df;
  --primary-100:#e9f0ff;

  --accent: #6fda44;      /* Éxito / acento */
  --accent-600:#4fb424;
  --accent-100:#edfff0;

  --warn: #ffa62b;        /* Advertencias */
  --warn-600:#e27d00;
  --warn-100:#fff5e6;

  --danger: #ff5470;      /* Errores */
  --danger-600:#d83a56;
  --danger-100:#ffe9ee;

  /* Roles (coinciden con .rol-IA, .rol-Alumno, .rol-Docente) */
  --ia: #0b7285;
  --alumno:#1c7ed6;
  --docente:#d9480f;

  --shadow: 0 10px 25px rgba(24,44,67,0.08);
  --radius: 14px;
}

/* Fondo con sutil degradado */
body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(1200px 800px at 80% -200px, #d0e0ff 0%, rgba(208,224,255,0) 60%),
    radial-gradient(1200px 800px at -200px 50%, #e9fff0 0%, rgba(233,255,240,0) 60%),
    var(--bg);
  min-height: 100vh;
}

/* Contenedor general */
.page{
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 20px;
}

h1{
  text-align: center;
  margin: 12px 0 22px;
  letter-spacing: .2px;
  font-weight: 800;
}

/* =========================
   Tarjetas y layout
   ========================= */
.card{
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(28,51,84,0.06);
}

/* Grilla 2 columnas (docente) */
.container,
.grid2{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
@media (max-width: 920px){
  .container,
  .grid2{ grid-template-columns: 1fr; }
}

/* Box con encabezado */
.box{
  composes: card; /* no todos los navegadores soportan, por si acaso duplicamos abajo */
}
.box{
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(28,51,84,0.06);
  padding: 14px;
}
.box h2{
  margin: 8px 8px 12px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

/* =========================
   Chat
   ========================= */
/* Compatibilidad con .chatbox y .chat-box */
.chatbox,
.chat-box{
  background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
  border-radius: calc(var(--radius) - 2px);
  border: 1px solid rgba(28,51,84,0.08);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.7);
  min-height: 240px;
  max-height: 420px;
  overflow-y: auto;
  padding: 12px;
}

/* Mensajes */
.msg{
  background: #ffffff;
  border: 1px solid rgba(28,51,84,0.06);
  border-radius: 12px;
  padding: 10px 12px;
  margin: 6px 0;
  box-shadow: 0 4px 14px rgba(24,44,67,0.05);
}
.msg strong{ margin-right: 6px; }
.ts{
  display: inline-block;
  margin-left: 6px;
  font-size: 11px;
  color: var(--muted);
}

/* Tags por rol (usados en <strong class="rol-IA">) */
.rol-IA{ color: var(--ia); }
.rol-Alumno{ color: var(--alumno); }
.rol-Docente{ color: var(--docente); }

/* Mensajes destacados por tipo (opcional) */
.msg.ia    { background: var(--primary-100); border-color: rgba(60,124,255,0.35); }
.msg.alumno{ background: #eef6ff; border-color: rgba(28,126,214,0.25); }
.msg.docente{ background: #fff2e9; border-color: rgba(217,72,15,0.22); }

/* Scrollbar estética */
.chatbox::-webkit-scrollbar,
.chat-box::-webkit-scrollbar{ width: 10px; }
.chatbox::-webkit-scrollbar-thumb,
.chat-box::-webkit-scrollbar-thumb{
  background: linear-gradient(180deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 8px;
}
.chatbox::-webkit-scrollbar-track,
.chat-box::-webkit-scrollbar-track{ background: rgba(0,0,0,0.05); }

/* =========================
   Formularios y controles
   ========================= */
textarea, input[type="text"], input[type="search"]{
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(28,51,84,0.15);
  background: #fff;
  padding: 10px 12px;
  font-size: 15px;
  outline: none;
  transition: box-shadow .2s ease, border-color .2s ease, transform .04s ease;
}
textarea{ min-height: 76px; resize: vertical; }

textarea:focus,
input[type="text"]:focus,
input[type="search"]:focus{
  box-shadow: 0 0 0 3px rgba(60,124,255,0.18);
  border-color: var(--primary);
}

/* Botones */
button{
  padding: 10px 16px;
  border-radius: 12px;
  border: 0;
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-600) 100%);
  color: #fff;
  font-weight: 700;
  letter-spacing: .2px;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(60,124,255,0.28);
  transition: transform .06s ease, box-shadow .2s ease, filter .2s ease;
}
button:hover{ filter: brightness(1.02); }
button:active{ transform: translateY(1px); }

button.secondary{
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-600) 100%);
  box-shadow: 0 8px 18px rgba(111,218,68,0.25);
}
button.warning{
  background: linear-gradient(180deg, var(--warn) 0%, var(--warn-600) 100%);
  box-shadow: 0 8px 18px rgba(255,166,43,0.28);
}
button.ghost{
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  box-shadow: none;
}

/* Inline badges útiles */
.badge{
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  line-height: 20px;
  border: 1px solid rgba(28,51,84,0.12);
  background: #fff;
  color: var(--muted);
}
.badge.ia{ color: var(--ia); border-color: rgba(11,114,133,.25); background: #ecfbff;}
.badge.alumno{ color: var(--alumno); border-color: rgba(28,126,214,.22); background: #eef6ff;}
.badge.docente{ color: var(--docente); border-color: rgba(217,72,15,.22); background: #fff2e9;}

/* Formularios arriba del grid */
form{
  background: rgba(255,255,255,0.7);
  border: 1px solid rgba(28,51,84,0.08);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow);
}

/* =========================
   Estados/alertas sutiles
   ========================= */
.alert{
  border-radius: 10px;
  padding: 10px 12px;
  margin: 8px 0;
  border: 1px solid transparent;
}
.alert.info{ background: var(--primary-100); border-color: rgba(60,124,255,0.35); }
.alert.warn{ background: var(--warn-100); border-color: rgba(255,166,43,0.35); }
.alert.danger{ background: var(--danger-100); border-color: rgba(255,84,112,0.35); }

/* =========================
   Accesibilidad
   ========================= */
*:focus-visible{
  outline: 3px solid rgba(60,124,255,0.35);
  outline-offset: 2px;
}

/* =========================
   Dark mode (opcional)
   ========================= */
@media (prefers-color-scheme: dark){
  :root{
    --bg: #0f1724;
    --card: #121a2a;
    --text: #f4f7fb;
    --muted: #a7b1c4;
    --shadow: 0 10px 25px rgba(0,0,0,0.35);
  }
  .chatbox, .chat-box{
    background: linear-gradient(180deg, #151f33 0%, #0f1724 100%);
    border-color: rgba(255,255,255,0.06);
  }
  .msg{
    background: #0f1724;
    border-color: rgba(255,255,255,0.06);
  }
  form{ background: rgba(18,26,42,0.8); }
  textarea, input[type="text"], input[type="search"]{
    background: #0f1724;
    border-color: rgba(255,255,255,0.12);
    color: var(--text);
  }
  .badge{ background: #0f1724; }
}