/* ============================================================
   ACADEMIA AUDICIÓN Y LENGUAJE — ESTILOS GLOBALES
   Paleta: Teal profundo + coral cálido + neutros elegantes
   Tipografía: DM Serif Display (títulos) + DM Sans (cuerpo)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=DM+Serif+Display:ital@0;1&display=swap');

:root {
    --color-primary: #1a6b5a;
    --color-primary-light: #228b72;
    --color-primary-dark: #0f4d3f;
    --color-accent: #e8734a;
    --color-accent-light: #f09070;
    --color-bg: #faf8f5;
    --color-bg-alt: #f0ece6;
    --color-surface: #ffffff;
    --color-text: #2d3436;
    --color-text-muted: #6b7280;
    --color-text-light: #9ca3af;
    --color-border: #e5e1db;
    --color-success: #27ae60;
    --color-warning: #f39c12;
    --color-danger: #e74c3c;
    --font-display: 'DM Serif Display', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- RESET & BASE ---- */
* { box-sizing: border-box; }

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
    font-family: var(--font-display);
    font-weight: 400;
    line-height: 1.3;
    color: var(--color-text);
}

a { color: var(--color-primary); transition: var(--transition); }
a:hover { color: var(--color-primary-dark); }

/* ---- NAVBAR PÚBLICA ---- */
.navbar-academia {
    background: rgba(255,255,255,0.95) !important;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 0.8rem 0;
}

.navbar-academia .navbar-brand img { height: 42px; }

.navbar-academia .nav-link {
    font-family: var(--font-body);
    font-weight: 500;
    color: var(--color-text) !important;
    font-size: 0.95rem;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.navbar-academia .nav-link:hover {
    color: var(--color-primary) !important;
    background: var(--color-bg-alt);
}

.btn-acceso {
    background: var(--color-primary) !important;
    color: #fff !important;
    border: none !important;
    padding: 0.5rem 1.5rem !important;
    border-radius: 50px !important;
    font-weight: 600 !important;
    font-size: 0.9rem !important;
    transition: var(--transition) !important;
}

.btn-acceso:hover {
    background: var(--color-primary-dark) !important;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ---- HERO ---- */
.hero-academia {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    overflow: hidden;
}

.hero-academia::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('https://images.pexels.com/photos/4145190/pexels-photo-4145190.jpeg?auto=compress&cs=tinysrgb&w=1920') no-repeat center center;
    background-size: cover;
    filter: brightness(0.35);
    z-index: 0;
}

.hero-academia .hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 2rem;
}

.hero-academia h1 {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    color: #fff;
    margin-bottom: 1.2rem;
    letter-spacing: -0.5px;
}

.hero-academia p {
    font-size: clamp(1.05rem, 2vw, 1.3rem);
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.8;
}

.btn-hero {
    background: var(--color-accent);
    color: #fff;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    text-decoration: none;
    display: inline-block;
    transition: var(--transition);
}

.btn-hero:hover {
    background: var(--color-accent-light);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(232, 115, 74, 0.4);
}

/* ---- SECCIONES ---- */
.section-academia {
    padding: 5rem 0;
}

.section-title-academia {
    font-family: var(--font-display);
    font-size: 2.4rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto 3.5rem;
    font-size: 1.1rem;
}

/* ---- CARDS METODOLOGÍA ---- */
.metodo-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    transition: var(--transition);
    height: 100%;
}

.metodo-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.metodo-card .icon-circle {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.6rem;
    color: #fff;
}

.metodo-card h4 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.metodo-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ---- SOBRE MÍ ---- */
.sobre-mi-img {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border-radius: 50%;
    border: 5px solid var(--color-bg-alt);
    box-shadow: var(--shadow-lg);
}

/* ---- FORMULARIO DE CONTACTO ---- */
.contacto-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: 3rem;
    box-shadow: var(--shadow-sm);
}

.contacto-card .form-control {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.8rem 1rem;
    font-family: var(--font-body);
    transition: var(--transition);
    background: var(--color-bg);
}

.contacto-card .form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 107, 90, 0.1);
    background: #fff;
}

.contacto-card .form-label {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-text);
    margin-bottom: 0.4rem;
}

/* ---- BOTONES GLOBALES ---- */
.btn-academia {
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 0.7rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.btn-academia:hover {
    background: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-academia-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 0.6rem 1.6rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.btn-academia-outline:hover {
    background: var(--color-primary);
    color: #fff;
}

.btn-danger-academia {
    background: var(--color-danger);
    color: #fff;
    border: none;
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.85rem;
    transition: var(--transition);
}

.btn-danger-academia:hover { background: #c0392b; color: #fff; }

/* ---- FOOTER ---- */
.footer-academia {
    background: var(--color-text);
    color: rgba(255,255,255,0.7);
    padding: 2.5rem 0;
    text-align: center;
    font-size: 0.9rem;
}

/* ---- ICONOS FLOTANTES ---- */
.icono-flotante {
    position: fixed;
    right: 24px;
    color: white;
    border-radius: 50%;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: var(--transition);
    text-decoration: none;
}

.icono-flotante:hover {
    transform: scale(1.1) translateY(-2px);
    color: white;
}

.icono-flotante.whatsapp {
    bottom: 96px;
    background: #25D366;
}

.icono-flotante.instagram {
    bottom: 28px;
    background: radial-gradient(circle at 30% 107%, #fdf497 0%, #fdf497 5%, #fd5949 45%, #d6249f 60%, #285AEB 90%);
}

/* ---- LOGIN ---- */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
}

.login-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}

.login-card h3 {
    font-family: var(--font-display);
    text-align: center;
    margin-bottom: 2rem;
}

/* ============================================================
   ZONA ALUMNO
   ============================================================ */

.alumno-body {
    padding-top: 70px;
    background: var(--color-bg);
}

/* Dashboard alumno */
.alumno-welcome {
    text-align: center;
    padding: 3rem 0 1rem;
}

.alumno-welcome h1 {
    font-family: var(--font-display);
    font-size: 2rem;
}

.alumno-welcome p { color: var(--color-text-muted); }

.next-lesson-card {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.next-lesson-card h5 { opacity: 0.8; font-family: var(--font-body); font-weight: 500; }
.next-lesson-card h2 { color: #fff; margin: 0.8rem 0; }
.next-lesson-card p { opacity: 0.85; }

.next-lesson-card .btn {
    background: rgba(255,255,255,0.2);
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
    border-radius: 50px;
    padding: 0.7rem 2rem;
    font-weight: 600;
    transition: var(--transition);
}

.next-lesson-card .btn:hover {
    background: #fff;
    color: var(--color-primary);
    border-color: #fff;
}

/* Lista de lecciones del alumno */
.leccion-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.2rem 1.5rem;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
    text-decoration: none;
    color: var(--color-text);
}

.leccion-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
    color: var(--color-primary);
}

.leccion-item .leccion-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    color: var(--color-primary);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.leccion-item .bi-chevron-right { color: var(--color-text-light); }

/* Vista lección */
.leccion-video-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

.leccion-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.leccion-card-header {
    background: var(--color-bg-alt);
    padding: 1rem 1.5rem;
    font-family: var(--font-display);
    font-size: 1.15rem;
    border-bottom: 1px solid var(--color-border);
}

.leccion-card-body { padding: 1.5rem; }

/* Chat de dudas */
.duda-burbuja {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md) var(--radius-md) var(--radius-md) 4px;
    padding: 1rem 1.2rem;
    margin-bottom: 0.8rem;
    max-width: 85%;
}

.duda-burbuja.respuesta {
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius-md) var(--radius-md) 4px var(--radius-md);
    margin-left: auto;
}

.duda-burbuja .duda-fecha {
    font-size: 0.75rem;
    opacity: 0.6;
    margin-top: 0.4rem;
}

/* ============================================================
   ZONA ADMIN / SIDEBAR
   ============================================================ */

.admin-sidebar {
    background: linear-gradient(180deg, #1a2332 0%, #0f1923 100%);
    padding-top: 1.5rem;
    height: 100vh;
    position: fixed;
    width: inherit;
    overflow-y: auto;
}

.admin-sidebar .sidebar-logo {
    display: block;
    text-align: center;
    margin-bottom: 2rem;
    padding: 0 1rem;
}

.admin-sidebar .sidebar-logo img { height: 45px; filter: brightness(0) invert(1); opacity: 0.9; }

.admin-sidebar .nav-link {
    color: rgba(255,255,255,0.55);
    font-size: 0.92rem;
    font-weight: 500;
    padding: 0.7rem 1.5rem;
    border-radius: 0 50px 50px 0;
    margin-right: 1rem;
    margin-bottom: 2px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.admin-sidebar .nav-link:hover {
    color: #fff;
    background: rgba(255,255,255,0.08);
}

.admin-sidebar .nav-link.active {
    color: #fff;
    background: var(--color-primary);
}

.admin-sidebar .nav-link i { font-size: 1.1rem; width: 22px; text-align: center; }

.admin-sidebar .sidebar-divider {
    border-top: 1px solid rgba(255,255,255,0.08);
    margin: 1rem 1.5rem;
}

.admin-main {
    background: var(--color-bg);
    min-height: 100vh;
    padding: 2rem 2.5rem;
}

.admin-page-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    margin-bottom: 0.3rem;
}

/* Admin stat cards */
.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition);
    text-decoration: none;
    color: var(--color-text);
    display: block;
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    color: var(--color-text);
}

.stat-card .stat-number {
    font-family: var(--font-display);
    font-size: 2.2rem;
    line-height: 1;
}

.stat-card .stat-label {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    margin-top: 0.3rem;
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

/* Admin tables */
.table-academia {
    border-collapse: separate;
    border-spacing: 0;
}

.table-academia thead th {
    background: var(--color-bg-alt);
    border: none;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
    padding: 1rem;
}

.table-academia thead th:first-child { border-radius: var(--radius-md) 0 0 0; }
.table-academia thead th:last-child { border-radius: 0 var(--radius-md) 0 0; }

.table-academia tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.table-academia tbody tr:last-child td { border-bottom: none; }

.table-academia tbody tr:hover td {
    background: var(--color-bg);
}

/* Admin forms */
.admin-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.admin-card .card-body { padding: 2rem; }

.admin-card .form-control, .admin-card .form-select {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.7rem 1rem;
    transition: var(--transition);
    background: var(--color-bg);
}

.admin-card .form-control:focus, .admin-card .form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26, 107, 90, 0.1);
    background: #fff;
}

/* Badges */
.badge-pendiente {
    background: rgba(243, 156, 18, 0.12);
    color: #d68910;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.8rem;
}

.badge-corregido {
    background: rgba(39, 174, 96, 0.12);
    color: #1e8449;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.8rem;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
    .hero-academia { min-height: 70vh; }
    .hero-academia h1 { font-size: 2rem; }
    .section-academia { padding: 3rem 0; }
    .admin-main { padding: 1rem; }
    .contacto-card { padding: 1.5rem; }
}