/* Estilos generales */
:root {
    --primary-color: #2F6FFF;
    --primary-hover: #1b5ae0;
    --secondary-color: #e9f0ff;
    --text-color: #1E293B;
    --light-text: #64748B;
    --background-color: #f8f9fa;
    --card-background: #ffffff;
    --border-color: #e2e8f0;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --sidebar-width: 260px;
    --header-height: 70px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --transition: all 0.2s ease;
}

/* Estilos base y reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
    line-height: 1.5;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* Contenedor principal */
.tutor-dashboard-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* Sidebar fija */
.tutor-dashboard-sidebar {
    position: fixed;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--card-background);
    border-right: 1px solid var(--border-color);
    padding-top: 0;
    overflow-y: auto;
    z-index: 100;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

/* Logo y botón premium */
.tutor-dashboard-logo {
    padding: 20px;
    margin-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.tutor-dashboard-logo img {
    max-width: 120px;
    height: auto;
}

.tutor-premium-button {
    display: block;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 10px 15px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
    box-shadow: 0 2px 5px rgba(47, 111, 255, 0.2);
}

.tutor-premium-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(47, 111, 255, 0.3);
}

/* Menú de navegación */
.tutor-dashboard-nav-title {
    padding: 0 20px;
    margin: 15px 0 10px;
    font-size: 12px;
    font-weight: 600;
    color: var(--light-text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tutor-dashboard-nav {
    padding: 0 10px;
    margin-bottom: 20px;
}

.tutor-dashboard-nav-item {
    margin-bottom: 2px;
    border-radius: 8px;
    overflow: hidden;
}

.tutor-dashboard-nav-link {
    display: flex;
    align-items: center;
    padding: 12px 15px;
    color: var(--text-color);
    font-size: 14px;
    transition: var(--transition);
    border-radius: 8px;
}

.tutor-dashboard-nav-link:hover {
    background-color: var(--secondary-color);
    color: var(--primary-color);
}

.tutor-dashboard-nav-link.active {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    font-weight: 600;
}

.tutor-dashboard-nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-size: 18px;
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

/* Contenido principal */
.tutor-dashboard-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 30px;
    min-height: 100vh;
}

/* Barra de búsqueda */
.tutor-dashboard-search {
    position: relative;
    max-width: 500px;
    margin-bottom: 25px;
}

.tutor-dashboard-search input {
    width: 100%;
    padding: 12px 15px 12px 45px;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-size: 14px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.tutor-dashboard-search input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(47, 111, 255, 0.15);
}

.tutor-dashboard-search-icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--light-text);
    font-size: 18px;
}

/* Cabecera de sección */
.tutor-dashboard-header {
    margin-bottom: 30px;
}

.tutor-dashboard-title {
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 10px 0;
    color: var(--text-color);
}

.tutor-dashboard-subtitle {
    font-size: 16px;
    color: var(--light-text);
    margin: 0 0 20px 0;
}

/* Filtros de cursos */
.tutor-dashboard-filters {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
    gap: 10px;
}

.tutor-dashboard-filter-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--light-text);
    margin-right: 15px;
}

.tutor-dashboard-filter-options {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tutor-dashboard-filter-option {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    background-color: white;
}

.tutor-dashboard-filter-option:hover {
    border-color: var(--primary-color);
    background-color: var(--secondary-color);
}

.tutor-dashboard-filter-option.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 2px 5px rgba(47, 111, 255, 0.2);
}

/* Grid de cursos */
.tutor-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-bottom: 40px;
}

/* Tarjeta de curso */
.tutor-dashboard-card {
    background-color: var(--card-background);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
}

.tutor-dashboard-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.tutor-card-image {
    position: relative;
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.tutor-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.tutor-dashboard-card:hover .tutor-card-image img {
    transform: scale(1.05);
}

.tutor-card-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: rgba(30, 41, 59, 0.75);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    font-weight: 500;
    backdrop-filter: blur(2px);
}

.tutor-card-date {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background-color: var(--primary-color);
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 12px;
    font-weight: 500;
}

.tutor-card-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.tutor-card-title {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 10px 0;
    color: var(--text-color);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 44px;
}

.tutor-card-instructor {
    font-size: 14px;
    color: var(--light-text);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.tutor-card-instructor-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-right: 8px;
    background-color: var(--secondary-color);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color);
}

.tutor-card-instructor-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tutor-card-progress {
    margin-top: auto;
    margin-bottom: 15px;
}

.tutor-progress-bar {
    height: 8px;
    background-color: #f0f0f0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.tutor-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #5b8cff);
    border-radius: 4px;
}

.tutor-progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--light-text);
}

.tutor-card-button {
    display: block;
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 5px rgba(47, 111, 255, 0.2);
}

.tutor-card-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(47, 111, 255, 0.3);
}

/* Paginación */
.tutor-dashboard-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    gap: 5px;
}

.tutor-pagination-item {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
}

.tutor-pagination-item:hover {
    background-color: var(--secondary-color);
    color: var(--primary-color);
}

.tutor-pagination-item.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tutor-pagination-prev,
.tutor-pagination-next {
    font-size: 18px;
}

/* Estado vacío */
.tutor-dashboard-empty {
    text-align: center;
    padding: 60px 20px;
    background-color: var(--card-background);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.tutor-dashboard-empty-icon {
    font-size: 48px;
    color: #d4d4d4;
    margin-bottom: 20px;
}

.tutor-dashboard-empty-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
}

.tutor-dashboard-empty-text {
    color: var(--light-text);
    margin-bottom: 25px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.tutor-dashboard-empty-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
}

.tutor-dashboard-empty-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

/* Estilos responsivos */
@media (max-width: 1200px) {
    .tutor-dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .tutor-dashboard-sidebar {
        width: 240px;
    }
    
    .tutor-dashboard-main {
        margin-left: 240px;
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .tutor-dashboard-sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .tutor-dashboard-main {
        margin-left: 0;
        padding: 15px;
    }
    
    .tutor-dashboard-container {
        flex-direction: column;
    }
    
    .tutor-dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .tutor-dashboard-logo {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}