/* ============================================
   CampusYa - Estilos base
   Diseño neutro/genérico, reutilizable por academia.
   Los colores de marca (--color-primario / --color-secundario) 
   se cargan dinámicamente desde la tabla "academias".
   ============================================ */

:root {
    --color-primario: #2563EB;
    --color-secundario: #0EA5E9;
    --color-texto: #1E293B;
    --color-texto-claro: #64748B;
    --color-fondo: #F8FAFC;
    --color-borde: #E2E8F0;
    --color-exito: #16A34A;
    --color-alerta: #DC2626;
    --color-blanco: #FFFFFF;
    --radio: 12px;
    --sombra: 0 2px 8px rgba(15, 23, 42, 0.06);
    --sombra-hover: 0 8px 24px rgba(15, 23, 42, 0.10);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--color-fondo);
    color: var(--color-texto);
    line-height: 1.6;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.contenedor {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
.header {
    background: var(--color-blanco);
    border-bottom: 1px solid var(--color-borde);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    max-width: 1140px;
    margin: 0 auto;
}
.logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-primario);
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-links {
    display: flex;
    gap: 28px;
    align-items: center;
}
.nav-links a {
    font-weight: 500;
    color: var(--color-texto-claro);
    transition: color .2s;
}
.nav-links a:hover { color: var(--color-primario); }

/* ===== Botones ===== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radio);
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: all .2s;
    text-align: center;
}
.btn-primario {
    background: var(--color-primario);
    color: white;
}
.btn-primario:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-secundario {
    background: var(--color-blanco);
    color: var(--color-primario);
    border: 1.5px solid var(--color-primario);
}
.btn-secundario:hover { background: var(--color-fondo); }
.btn-block { width: 100%; }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }
.btn-peligro { background: var(--color-alerta); color: white; }

/* ===== Hero ===== */
.hero {
    background: linear-gradient(135deg, var(--color-primario), var(--color-secundario));
    color: white;
    padding: 80px 24px;
    text-align: center;
}
.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    max-width: 700px;
    margin-inline: auto;
}
.hero p {
    font-size: 1.15rem;
    opacity: 0.95;
    max-width: 560px;
    margin: 0 auto 32px;
}
.hero-botones { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Secciones ===== */
.seccion { padding: 64px 24px; }
.seccion-titulo {
    text-align: center;
    margin-bottom: 40px;
}
.seccion-titulo h2 { font-size: 1.9rem; font-weight: 800; margin-bottom: 8px; }
.seccion-titulo p { color: var(--color-texto-claro); }

/* ===== Grid de cursos / cards ===== */
.grid-cursos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.card-curso {
    background: var(--color-blanco);
    border-radius: var(--radio);
    overflow: hidden;
    box-shadow: var(--sombra);
    transition: all .25s;
    border: 1px solid var(--color-borde);
}
.card-curso:hover { box-shadow: var(--sombra-hover); transform: translateY(-3px); }
.card-curso-imagen {
    height: 140px;
    background: linear-gradient(135deg, var(--color-primario), var(--color-secundario));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}
.card-curso-body { padding: 20px; }
.card-curso-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
.card-curso-body p { color: var(--color-texto-claro); font-size: 0.92rem; margin-bottom: 16px; }
.card-curso-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    border-top: 1px solid var(--color-borde);
}
.precio { font-weight: 700; color: var(--color-primario); font-size: 1.05rem; }

/* ===== Formularios ===== */
.form-card {
    background: var(--color-blanco);
    border-radius: var(--radio);
    box-shadow: var(--sombra);
    padding: 40px;
    max-width: 420px;
    margin: 60px auto;
}
.form-card h2 { margin-bottom: 8px; }
.form-card .subtitulo { color: var(--color-texto-claro); margin-bottom: 28px; font-size: 0.92rem; }
.campo { margin-bottom: 18px; }
.campo label {
    display: block;
    font-weight: 600;
    font-size: 0.88rem;
    margin-bottom: 6px;
}
.campo input, .campo select, .campo textarea {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid var(--color-borde);
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color .2s;
}
.campo input:focus, .campo select:focus, .campo textarea:focus {
    outline: none;
    border-color: var(--color-primario);
}
.alerta {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.88rem;
    margin-bottom: 18px;
}
.alerta-error { background: #FEF2F2; color: var(--color-alerta); border: 1px solid #FECACA; }
.alerta-exito { background: #F0FDF4; color: var(--color-exito); border: 1px solid #BBF7D0; }

/* ===== Layout Campus (alumno) ===== */
.layout-app { display: flex; min-height: 100vh; }
.sidebar {
    width: 250px;
    background: var(--color-blanco);
    border-right: 1px solid var(--color-borde);
    padding: 24px 0;
    flex-shrink: 0;
}
.sidebar-logo { padding: 0 24px 24px; font-weight: 800; font-size: 1.2rem; color: var(--color-primario); }
.sidebar-nav a {
    display: block;
    padding: 12px 24px;
    color: var(--color-texto-claro);
    font-weight: 500;
    border-left: 3px solid transparent;
}
.sidebar-nav a:hover, .sidebar-nav a.activo {
    background: var(--color-fondo);
    color: var(--color-primario);
    border-left-color: var(--color-primario);
}
.main-content { flex: 1; padding: 32px; max-width: 100%; overflow-x: auto; }

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}
.topbar h1 { font-size: 1.5rem; }
.usuario-chip {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}
.avatar-circulo {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--color-primario);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

/* ===== Estado / badges ===== */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 600;
}
.badge-activa { background: #F0FDF4; color: var(--color-exito); }
.badge-vencida { background: #FEF2F2; color: var(--color-alerta); }
.badge-pendiente { background: #FFFBEB; color: #B45309; }

/* ===== Listado de módulos/clases ===== */
.modulo-bloque {
    background: var(--color-blanco);
    border-radius: var(--radio);
    margin-bottom: 16px;
    box-shadow: var(--sombra);
    overflow: hidden;
}
.modulo-header {
    padding: 16px 20px;
    font-weight: 700;
    background: var(--color-fondo);
    border-bottom: 1px solid var(--color-borde);
}
.clase-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--color-borde);
    transition: background .15s;
}
.clase-item:last-child { border-bottom: none; }
.clase-item:hover { background: var(--color-fondo); }
.clase-item-info { display: flex; align-items: center; gap: 12px; }
.icono-play {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--color-primario);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
}

/* ===== Tablas admin ===== */
.tabla-admin {
    width: 100%;
    background: var(--color-blanco);
    border-radius: var(--radio);
    overflow: hidden;
    box-shadow: var(--sombra);
    border-collapse: collapse;
}
.tabla-admin th, .tabla-admin td {
    padding: 14px 18px;
    text-align: left;
    border-bottom: 1px solid var(--color-borde);
    font-size: 0.9rem;
}
.tabla-admin th { background: var(--color-fondo); font-weight: 700; font-size: 0.82rem; text-transform: uppercase; color: var(--color-texto-claro); }
.tabla-admin tr:last-child td { border-bottom: none; }

.acciones-fila { display: flex; gap: 8px; }

/* ===== Footer ===== */
.footer {
    background: var(--color-texto);
    color: #CBD5E1;
    padding: 40px 24px;
    text-align: center;
    font-size: 0.88rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .layout-app { flex-direction: column; }
    .sidebar { width: 100%; }
    .hero h1 { font-size: 1.8rem; }
    .main-content { padding: 18px; }
}