/* Reset y Variables - Tema Claro (Por Defecto) */
:root {
    /* Colores principales */
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --secondary-color: #FF9800;
    --success-color: #4CAF50;
    --danger-color: #F44336;
    --warning-color: #FFC107;
    
    /* Colores de fondo */
    --bg-primary: #FFFFFF;
    --bg-secondary: #E3F2FD; /* Azul celeste más intenso */
    --bg-card: #FFFFFF;
    
    /* Colores de texto */
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-inverse: #FFFFFF;
    
    /* Bordes y sombras */
    --border-color: #E0E0E0;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 8px rgba(0,0,0,0.15);
    
    /* Compatibilidad con código existente */
    --white: var(--bg-primary);
    --light-color: var(--bg-secondary);
    --dark-color: var(--text-primary);
}

/* Tema Oscuro */
[data-theme="dark"] {
    /* Colores principales (se mantienen iguales para consistencia) */
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --secondary-color: #FF9800;
    --success-color: #4CAF50;
    --danger-color: #F44336;
    --warning-color: #FFC107;
    
    /* Colores de fondo - Gris oscuro pero no muy negro */
    --bg-primary: #2D2D2D;
    --bg-secondary: #1E1E1E;
    --bg-card: #3A3A3A;
    
    /* Colores de texto */
    --text-primary: #E0E0E0;
    --text-secondary: #B0B0B0;
    --text-inverse: #212121;
    
    /* Bordes y sombras */
    --border-color: #4A4A4A;
    --shadow: 0 2px 4px rgba(0,0,0,0.3);
    --shadow-lg: 0 4px 8px rgba(0,0,0,0.5);
    
    /* Compatibilidad */
    --white: var(--bg-card);
    --light-color: var(--bg-secondary);
    --dark-color: var(--text-primary);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    padding-top: 60px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    box-shadow: var(--shadow);
    z-index: 1000;
    height: 60px;
    transition: background-color 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 15px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-brand .icon {
    font-size: 1.8rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
    gap: 4px;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

/* Ocultar menú en móvil por defecto - se mostrará con JS */
@media (max-width: 768px) {
    .nav-menu:not(.active) {
        display: none !important;
    }
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background 0.3s;
    white-space: nowrap;
}

.nav-link:hover {
    background: var(--bg-secondary);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: nowrap;
    white-space: nowrap;
}

.user-name {
    color: var(--text-secondary);
    font-size: 0.9rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-logout {
    background: var(--danger-color);
    color: var(--white);
    padding: 8px 16px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.9rem;
    white-space: nowrap;
    flex-shrink: 0;
}

/* Messages */
.messages-container {
    position: fixed;
    top: 70px;
    right: 20px;
    z-index: 999;
    max-width: 400px;
}

.alert {
    padding: 15px 20px;
    margin-bottom: 10px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease;
}

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

.alert-success {
    background: var(--success-color);
    color: var(--white);
}

.alert-error {
    background: var(--danger-color);
    color: var(--white);
}

.alert-info {
    background: var(--primary-color);
    color: var(--white);
}

.close-btn {
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    margin-left: 15px;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    transition: background-color 0.3s ease;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.card-title {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s;
    font-weight: 500;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-success {
    background: var(--success-color);
    color: var(--white);
}

.btn-danger {
    background: var(--danger-color);
    color: var(--white);
}

.btn-secondary {
    background: var(--text-secondary);
    color: var(--white);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Status Badges */
.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.badge-iniciada {
    background: #E3F2FD;
    color: #1976D2;
}

.badge-en_proceso {
    background: #FFF3E0;
    color: #F57C00;
}

.badge-detenida {
    background: #FFEBEE;
    color: #C62828;
}

.badge-terminada {
    background: #E8F5E9;
    color: #2E7D32;
}

/* Activity List */
.activity-list {
    display: grid;
    gap: 15px;
}

.activity-item {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.3s ease;
    cursor: pointer;
    border-left: 4px solid var(--border-color);
}

/* Colores de fondo según estado - Tema Claro */
.activity-item.estado-iniciada {
    background: #E0E0E0; /* Gris */
    border-left-color: #757575;
}

.activity-item.estado-en_proceso {
    background: #FFF9C4; /* Amarillo claro */
    border-left-color: #FBC02D;
}

.activity-item.estado-detenida {
    background: #FFEBEE; /* Rojo claro */
    border-left-color: #F44336;
}

.activity-item.estado-terminada {
    background: #E8F5E9; /* Verde claro */
    border-left-color: #4CAF50;
}

/* Colores de fondo según estado - Tema Oscuro */
[data-theme="dark"] .activity-item.estado-iniciada {
    background: #4A4A4A; /* Gris oscuro */
    border-left-color: #757575;
    color: var(--text-primary);
}

[data-theme="dark"] .activity-item.estado-en_proceso {
    background: #5A4A2A; /* Amarillo oscuro */
    border-left-color: #FBC02D;
    color: var(--text-primary);
}

[data-theme="dark"] .activity-item.estado-detenida {
    background: #5A2A2A; /* Rojo oscuro */
    border-left-color: #F44336;
    color: var(--text-primary);
}

[data-theme="dark"] .activity-item.estado-terminada {
    background: #2A4A2A; /* Verde oscuro */
    border-left-color: #4CAF50;
    color: var(--text-primary);
}

.activity-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.activity-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 15px;
}

.activity-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.activity-meta {
    display: flex;
    gap: 15px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

/* Calendar */
.calendar-container {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    transition: background-color 0.3s ease;
}

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

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
}

.calendar-day {
    aspect-ratio: 1;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.calendar-day:hover {
    background: var(--light-color);
    border-color: var(--primary-color);
}

.calendar-day.today {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.calendar-day.has-activities {
    background: #E3F2FD;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: background-color 0.3s ease;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* FAB */
.fab {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    z-index: 100;
    transition: transform 0.3s;
}

.fab:hover {
    transform: scale(1.1);
}

.fab span {
    line-height: 1;
}

/* Images */
.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.image-item {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 1;
}

.image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.2s;
}

.image-item img:hover {
    transform: scale(1.05);
}

/* Modal para ampliar imágenes */
.image-modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    animation: fadeIn 0.3s;
}

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

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

.image-modal-content {
    max-width: 95%;
    max-height: 95%;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    animation: zoomIn 0.3s;
}

@keyframes zoomIn {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.image-modal-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 10001;
    background: rgba(0, 0, 0, 0.5);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

.image-modal-close:hover {
    background: rgba(0, 0, 0, 0.8);
}

.image-modal-info {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    background: rgba(0, 0, 0, 0.7);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    text-align: center;
}

/* Responsive Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        align-items: stretch;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        transform: translateX(-100%);
        transition: transform 0.3s ease, background-color 0.3s ease;
        z-index: 1000;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
        gap: 0;
        opacity: 0;
        visibility: hidden;
    }
    
    .nav-menu.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        display: block;
        padding: 15px;
        border-bottom: 1px solid var(--border-color);
        text-align: left;
        width: 100%;
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    .nav-user {
        flex-direction: column;
        align-items: stretch;
        padding: 15px 0;
        border-top: 2px solid var(--border-color);
        margin-top: 10px;
        gap: 15px;
    }
    
    .theme-toggle {
        width: 100%;
        justify-content: center;
        margin-bottom: 10px;
    }
    
    .user-name {
        text-align: center;
        font-size: 1rem;
        font-weight: 500;
    }
    
    .btn-logout {
        width: 100%;
        text-align: center;
        padding: 12px;
    }
    
    .user-avatar,
    .user-avatar-placeholder {
        margin: 0 auto 10px auto !important;
    }
    
    .main-content {
        padding: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .calendar-grid {
        gap: 5px;
    }
    
    .calendar-day {
        padding: 5px;
        font-size: 0.8rem;
    }
}

/* Loading */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Mobile - Pantallas muy pequeñas */
@media (max-width: 480px) {
    .nav-brand span:not(.icon) {
        display: none;
    }
    
    .nav-container {
        padding: 0 15px;
    }
}


/* Mobile - Pantallas muy pequeñas */
@media (max-width: 480px) {
    .nav-brand span:not(.icon) {
        display: none;
    }
    .nav-container {
        padding: 0 15px;
    }
}

/* Selector de Tema */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: nowrap;
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: var(--bg-card);
    transform: scale(1.05);
}

.theme-toggle-icon {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.theme-toggle:hover .theme-toggle-icon {
    transform: rotate(180deg);
}

/* Ajustes adicionales para tema oscuro */
[data-theme="dark"] .form-control {
    background-color: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--border-color);
}

[data-theme="dark"] .form-control:focus {
    background-color: var(--bg-card);
    border-color: var(--primary-color);
}

[data-theme="dark"] .calendar-day {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

[data-theme="dark"] .calendar-day:hover {
    background-color: var(--bg-secondary);
}

[data-theme="dark"] .calendar-day.has-activities {
    background: rgba(33, 150, 243, 0.2);
}

[data-theme="dark"] .image-modal {
    background-color: rgba(0, 0, 0, 0.98);
}

/* Estilos para cards de actividades en pizarra.html y calendario.html - Tema Oscuro */
[data-theme="dark"] .actividad-card.iniciada {
    background: #4A4A4A;
    border-left-color: #757575;
    color: var(--text-primary);
}

[data-theme="dark"] .actividad-card.en_proceso {
    background: #5A4A2A;
    border-left-color: #FBC02D;
    color: var(--text-primary);
}

[data-theme="dark"] .actividad-card.detenida {
    background: #5A2A2A;
    border-left-color: #F44336;
    color: var(--text-primary);
}

[data-theme="dark"] .actividad-card.terminada {
    background: #2A4A2A;
    border-left-color: #4CAF50;
    color: var(--text-primary);
}

[data-theme="dark"] .activity-calendar-item.estado-iniciada {
    background: #4A4A4A;
    border-left-color: #757575;
    color: var(--text-primary);
}

[data-theme="dark"] .activity-calendar-item.estado-en_proceso {
    background: #5A4A2A;
    border-left-color: #FBC02D;
    color: var(--text-primary);
}

[data-theme="dark"] .activity-calendar-item.estado-detenida {
    background: #5A2A2A;
    border-left-color: #F44336;
    color: var(--text-primary);
}

[data-theme="dark"] .activity-calendar-item.estado-terminada {
    background: #2A4A2A;
    border-left-color: #4CAF50;
    color: var(--text-primary);
}