/* === ESTILOS.CSS (CÓDIGO COMPLETO FINAL) === */

/* --- Reset y Estilos Base --- */
/* Un reseteo básico para eliminar los márgenes y rellenos por defecto de los navegadores. */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Estilos generales para el cuerpo del documento. */
body {
    font-family: 'Inter', sans-serif; /* Fuente principal del proyecto. */
    background-color: #122C4F; /* Color de fondo principal (Paleta: Midnight). */
    color: #FBF9E4; /* Color de texto principal (Paleta: Pearl Perfect). */
    min-height: 100vh; /* Asegura que el cuerpo ocupe al menos toda la altura de la pantalla. */
    overflow-x: hidden; /* Evita el desbordamiento horizontal. */
    /* Fondo con gradiente para un efecto visual más atractivo. */
    background-image: linear-gradient(to top, #1760be, #0f5fe0, #1656ce, #115df7, #156cb4);
    background-attachment: fixed; /* Fija la imagen de fondo para que no se desplace con el contenido. */
}

/* Contenedor principal para centrar el contenido. */
.container {
    max-width: 1200px; /* Ancho máximo del contenedor. */
    margin: 0 auto; /* Centra el contenedor horizontalmente. */
    padding: 20px; /* Espaciado interno. */
}
/* AÑADE ESTE CÓDIGO A estilos.css */
.schedule-grid.academic-mode-active {
    background-color: rgba(91, 136, 178, 0.1);
    border-radius: 15px;
    padding: 10px;
    transition: background-color 0.4s ease;
}

.schedule-grid.academic-mode-active .task-item {
    cursor: pointer;
    animation: pulse-light 2s infinite;
}

@keyframes pulse-light {
    0% { box-shadow: 0 0 0 0 rgba(91, 136, 178, 0.4); }
    70% { box-shadow: 0 0 0 10px rgba(91, 136, 178, 0); }
    100% { box-shadow: 0 0 0 0 rgba(91, 136, 178, 0); }
}
/* --- Pantallas y Animaciones --- */
/* Oculta las pantallas por defecto. */
.screen {
    display: none;
    min-height: 100vh;
    animation: fadeIn 0.5s ease-in-out; /* Animación de aparición. */
}

/* Muestra la pantalla activa. */
.screen.active {
    display: block;
}

/* Definición de la animación 'fadeIn'. */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Encabezado Principal --- */
.main-header {
    text-align: center;
    margin-bottom: 50px;
    color: #FBF9E4;
}

.main-header i {
    font-size: 4rem;
    margin-bottom: 20px;
    display: block;
    color: #00a2ff; /* (Paleta: Ocean) */
    text-shadow: 0 0 20px #5b88b2b3;
}

.main-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.main-header p {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 300;
}

/* --- Pie de Página --- */
.site-footer {
    background: rgba(0, 0, 0, 0.3);
    color: #FBF9E4;
    text-align: center;
    padding: 1rem;
    position: relative;
    width: 100%;
    margin-top: 40px;
    font-weight: 300;
}

/* --- Grid de Cursos con Efecto "Glassmorphism" --- */
.course-grid {
    display: grid;
    /* Por defecto, una columna para móviles. */
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 40px;
}

.course-card {
    padding: 40px 30px;
    text-align: center;
    cursor: pointer;
    border-radius: 20px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    
    /* Efecto de vidrio para un look moderno. */
    background: rgba(251, 249, 228, 0.1);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(251, 249, 228, 0.2);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.course-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(251, 249, 228, 0.15) 0%, rgba(251, 249, 228, 0) 60%);
    transform: scale(0);
    transition: transform 0.6s ease;
}
.course-card:hover::before {
    transform: scale(2);
}

.course-card:hover {
    transform: translateY(-10px);
}

.course-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #00b7ff, #1678d4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.course-card:hover .course-icon {
    transform: scale(1.1);
    box-shadow: 0 10px 25px rgba(91, 136, 178, 0.4);
}

.course-icon i {
    font-size: 2rem;
    color: #FBF9E4;
    position: relative;
    z-index: 2;
}

.course-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #FBF9E4;
    position: relative;
    z-index: 2;
}

.course-card p {
    color: #b4c2d0;
    font-weight: 400;
    position: relative;
    z-index: 2;
}

/* --- Encabezado del Cronograma --- */
.schedule-header {
    display: flex;
    /* Por defecto, los elementos se apilan verticalmente en móviles. */
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px;
    border-radius: 15px;
    gap: 15px; /* Espacio entre elementos cuando están en columna. */
    
    /* Efecto de vidrio. */
    background: rgba(18, 44, 79, 0.3);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(91, 136, 178, 0.25);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.back-btn {
    background: linear-gradient(135deg, #c14444, #b43b34);
    color: #FBF9E4;
    border: none;
    padding: 12px 20px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.back-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(193, 68, 68, 0.4);
}

.schedule-header h1 {
    font-size: 2rem;
    font-weight: 600;
    color: #FBF9E4;
}

.academic-btn {
    background: #5B88B2;
    color: #122C4F;
    border: none;
    padding: 12px 20px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.academic-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(91, 136, 178, 0.4);
}

.academic-btn.active {
    background: linear-gradient(135deg, #FBF9E4, #e0dccc);
    color: #122C4F;
    box-shadow: 0 0 20px rgba(251, 249, 228, 0.5);
}

/* --- Panel Académico --- */
.academic-panel {
    background: linear-gradient(135deg, #5b88b2, #4a6f90);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0, 0.3);
    border: 1px solid rgba(251, 249, 228, 0.2);
    animation: slideDown 0.5s ease;
}

.academic-panel.hidden {
    display: none;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.panel-header h3 {
    color: #FBF9E4;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.exit-btn {
    background: rgba(18, 44, 79, 0.5);
    color: #FBF9E4;
    border: none;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.exit-btn:hover {
    background: #122C4F;
    transform: scale(1.1);
}

.add-task-form h4 {
    margin-bottom: 15px;
    color: #122C4F;
    font-weight: 600;
}

.form-group {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap; /* Permite que los elementos se ajusten en pantallas pequeñas. */
}

.form-group input,
.form-group select {
    padding: 12px 15px;
    border: 1px solid #5B88B2;
    border-radius: 10px;
    background: #FBF9E4;
    color: #122C4F;
    font-size: 1rem;
    transition: all 0.3s ease;
    min-width: 200px;
    flex-grow: 1; /* Permite que los campos crezcan y ocupen el espacio. */
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #122C4F;
    box-shadow: 0 0 10px rgba(18, 44, 79, 0.3);
}

#addTaskBtn {
    background: #122C4F;
    color: #FBF9E4;
    border: 1px solid #FBF9E4;
    padding: 12px 20px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-grow: 1; /* Permite que el botón crezca en pantallas pequeñas. */
}

#addTaskBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(18, 44, 79, 0.4);
}

/* --- Grid del Cronograma --- */
.schedule-grid {
    display: grid;
    /* Una columna en móviles para una mejor visualización. */
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 20px;
}

.day-column {
    padding: 20px;
    min-height: 400px;
    border-radius: 15px;
    transition: all 0.3s ease;
    /* Efecto de vidrio. */
    background: rgba(18, 44, 79, 0.4);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(91, 136, 178, 0.2);
}

.day-column:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.day-header {
    text-align: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #5B88B2;
}

.day-header i {
    font-size: 1.5rem;
    color: #5B88B2;
    margin-bottom: 10px;
    display: block;
}

.day-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #FBF9E4;
}

.tasks-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* --- Tareas --- */
.task-item {
    background: rgba(18, 44, 79, 0.7);
    border: 1px solid #5B88B2;
    border-radius: 10px;
    padding: 15px;
    transition: all 0.3s ease;
    position: relative;
    animation: taskAppear 0.5s ease;
    color: #FBF9E4;
}

@keyframes taskAppear {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.task-item:hover {
    border-color: #FBF9E4;
    background: rgba(91, 136, 178, 0.2);
}

.task-item.completed {
    background: rgba(91, 136, 178, 0.3);
    border-color: #FBF9E4;
}

.task-content {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.task-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid #5B88B2;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    flex-shrink: 0;
    margin-top: 2px;
}

.task-checkbox.checked {
    background: #5B88B2;
    border-color: #FBF9E4;
}

.task-checkbox.checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #122C4F;
    font-weight: bold;
    font-size: 12px;
}

.task-text {
    flex: 1;
    font-size: 0.95rem;
    line-height: 1.4;
    color: #FBF9E4;
}

.task-text.completed {
    text-decoration: line-through;
    opacity: 0.6;
}

.delete-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #c14444;
    color: white;
    border: none;
    width: 25px;
    height: 25px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 12px;
    opacity: 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.task-item:hover .delete-btn {
    opacity: 1;
}

.delete-btn:hover {
    background: #b43b34;
    transform: scale(1.1);
}

/* --- Modal --- */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    animation: modalFadeIn 0.3s ease;
    /* Efecto de vidrio. */
    background: rgba(18, 44, 79, 0.3);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes modalFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    border-radius: 20px;
    padding: 0;
    width: 90%;
    max-width: 400px;
    animation: modalSlideIn 0.3s ease;
    overflow: hidden;

    /* Efecto de vidrio. */
    background: rgba(18, 44, 79, 0.5);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(91, 136, 178, 0.3);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

@keyframes modalSlideIn {
    from { opacity: 0; transform: scale(0.8) translateY(-50px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    background: linear-gradient(135deg, #122C4F, #5B88B2);
    color: #FBF9E4;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-weight: 600;
    font-size: 1.2rem;
}

.close-btn {
    background: rgba(251, 249, 228, 0.1);
    border: none;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    color: #FBF9E4;
    cursor: pointer;
}

.modal-body {
    padding: 30px;
}

.modal-body p {
    margin-bottom: 20px;
    font-size: 1rem;
    color: #FBF9E4;
}

.modal-body input {
    width: 100%;
    padding: 15px;
    border: 1px solid #5B88B2;
    border-radius: 10px;
    font-size: 1rem;
    margin-bottom: 25px;
    background-color: rgba(0,0,0,0.2);
    color: #FBF9E4;
}

.modal-buttons {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
}

.cancel-btn {
    background: transparent;
    color: #FBF9E4;
    border: 1px solid #5B88B2;
    padding: 12px 25px;
    border-radius: 10px;
}

.confirm-btn {
    background: #5B88B2;
    color: #122C4F;
    border: none;
    padding: 12px 25px;
    border-radius: 10px;
    font-weight: bold;
}

/* --- Header Global (Navegación) --- */
.global-header {
    display: flex;
    /* Apila los elementos en móviles y permite que ocupen todo el ancho. */
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 1rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 50;
    
    /* Efecto de vidrio. */
    background: rgba(18, 44, 79, 0.5);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(91, 136, 178, 0.2);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.home-button {
    background: linear-gradient(135deg, #00b7ff, #3f94e4);
    color: #FBF9E4;
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.2s;
    justify-content: center; /* Centra el contenido del botón. */
}

.home-button:hover {
    background-color: #4a6f90;
}

.auth-button {
    background-color: transparent;
    border: 1px solid #5B88B2;
    color: #FBF9E4;
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}
.auth-button:hover {
    background-color: #5B88B2;
    color: #122C4F;
}

.user-auth-section, #user-profile {
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: center; /* Centra los elementos de autenticación. */
}

#user-name {
    font-weight: 600;
    color: #FBF9E4;
}

/* --- Notificaciones Toast --- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1050;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: 10px;
    color: #FBF9E4;
    font-weight: 500;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    animation: slideInToast 0.4s ease-out, fadeOutToast 0.4s ease-in 2.5s forwards;
    /* Efecto de vidrio. */
    background: rgba(18, 44, 79, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(91, 136, 178, 0.3);
}

.toast.success { border-left: 5px solid #28a745; }
.toast.error { border-left: 5px solid #dc3545; }
.toast.warning { border-left: 5px solid #ffc107; }
.toast.info { border-left: 5px solid #17a2b8; }

.toast i { font-size: 1.2rem; }

@keyframes slideInToast {
    from { opacity: 0; transform: translateX(100%); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeOutToast {
    from { opacity: 1; transform: translateX(0); }
    to { opacity: 0; transform: translateX(100%); visibility: hidden; }
}

/* --- Modal de Completar Perfil --- */
.profile-input-group {
    margin-top: 1rem;
    animation: fadeIn 0.4s ease-in-out;
}

#profile-form label { color: #b4c2d0; }
#profile-form input,
#profile-form select {
    background-color: #122C4F;
    color: #FBF9E4;
    border: 1px solid #5B88B2;
}

/* --- Media Queries para Responsividad --- */

/* Para tablets (a partir de 768px de ancho). */
@media (min-width: 768px) {
    .main-header h1 {
        font-size: 2.5rem; /* Reduce un poco el tamaño del título. */
    }

    /* Dos columnas para la grilla de cursos. */
    .course-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Vuelve a la disposición horizontal para el header del cronograma. */
    .schedule-header {
        flex-direction: row;
    }

    /* Dos columnas para la grilla del cronograma. */
    .schedule-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Header de navegación en una sola fila. */
    .global-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* Para pantallas de escritorio (a partir de 1024px de ancho). */
@media (min-width: 1024px) {
    .main-header h1 {
        font-size: 3rem; /* Restaura el tamaño original del título. */
    }

    /* Tres columnas para la grilla de cursos. */
    .course-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }

    /* Cinco columnas para la grilla del cronograma, una para cada día. */
    .schedule-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}