/* ===================================
   COMPONENTS.CSS - Componentes UI
   =================================== */

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    background: transparent;
    position: relative;
    overflow: hidden;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: var(--box-shadow-lg);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--box-shadow);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #3730a3);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary-color), #7c2d92);
    color: white;
    box-shadow: var(--box-shadow);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: white;
    box-shadow: var(--box-shadow);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
    color: white;
    box-shadow: var(--box-shadow);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: white;
    box-shadow: var(--box-shadow);
}

.btn-outline {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* ===== MODAL CLOSE BUTTONS ===== */
.modal .card-header .btn-outline {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
    flex-shrink: 0;
}

.modal .card-header .btn-outline:hover {
    background: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
    transform: scale(1.1);
}

.modal .card-header .btn-outline i {
    font-size: 1rem;
}

/* ===== CARDS ===== */
.card {
    background: var(--card-background);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

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

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    gap: 1rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.card-content {
    flex: 1;
}

.card-footer {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

/* Stat Cards */
.stat-card {
    text-align: center;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
    z-index: 0;
}

.stat-card > * {
    position: relative;
    z-index: 1;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.875rem;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    transition: var(--transition);
    background: white;
    color: var(--text-primary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    outline: none;
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===== TABLES ===== */
.table-container {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    border: 1px solid var(--border-color);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

.table th,
.table td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.875rem;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: rgba(99, 102, 241, 0.05);
}

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

/* ===== BADGES ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-primary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* ===== ALERTS ===== */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    border-left: 4px solid;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #065f46;
    border-left-color: var(--success-color);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #92400e;
    border-left-color: var(--warning-color);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: #991b1b;
    border-left-color: var(--danger-color);
}

.alert-info {
    background: rgba(99, 102, 241, 0.1);
    color: #3730a3;
    border-left-color: var(--primary-color);
}

/* ===== STATUS BADGES ===== */
.status-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.status-present {
    background: rgba(16, 185, 129, 0.1);
    color: #065f46;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-absent {
    background: rgba(239, 68, 68, 0.1);
    color: #991b1b;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.status-late {
    background: rgba(245, 158, 11, 0.1);
    color: #92400e;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.status-excused {
    background: rgba(99, 102, 241, 0.1);
    color: #3730a3;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* ===== ACTIVITY LIST ===== */
.activity-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.activity-item {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.activity-item:hover {
    background: rgba(99, 102, 241, 0.05);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.activity-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
}

.activity-details {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.activity-details .course {
    font-style: italic;
}

.activity-details .time {
    color: var(--text-light);
}

.no-activity {
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
}

/* ===== FILTERS SECTION ===== */
.filters-section {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.filters-section .form-group {
    margin-bottom: 0;
    flex: 1;
}

.error-message {
    color: var(--danger-color);
    font-size: 0.875rem;
    display: none;
    margin-top: 0.25rem;
}

/* ===== REPORTS STYLES ===== */
.report-section {
    padding: 1.5rem 0;
}

.report-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

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

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.stat-present .stat-value { color: var(--success-color); }
.stat-absent .stat-value { color: var(--danger-color); }
.stat-late .stat-value { color: var(--warning-color); }
.stat-excused .stat-value { color: var(--primary-color); }

.report-table-container {
    margin-top: 2rem;
}

.report-table-container h5 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.chart-container {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

.chart-container canvas {
    max-width: 100%;
    height: auto;
}

.weekly-summary h5 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1rem;
}

.day-summary {
    text-align: center;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.day-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.day-stats {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.day-percentage {
    font-weight: 600;
    font-size: 1.25rem;
}

.monthly-overview {
    margin-bottom: 2rem;
}

.student-ranking h5 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

.ranking-position {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 600;
    font-size: 0.875rem;
}

.percentage-bar {
    position: relative;
    height: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 0.75rem;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.percentage-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--success-color), var(--primary-color));
    border-radius: 0.75rem;
    transition: var(--transition);
}

.percentage-text {
    position: relative;
    z-index: 1;
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-primary);
}

.course-comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.course-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition);
}

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

.course-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.course-header h5 {
    margin: 0;
    color: var(--text-primary);
    font-weight: 600;
}

.student-count {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.stat-row .stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.stat-row .stat-value {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.875rem;
}

/* ===== RESPONSIVE REPORTS ===== */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .summary-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 0.5rem;
    }
    
    .day-summary {
        padding: 0.5rem;
    }
    
    .course-comparison {
        grid-template-columns: 1fr;
    }
    
    .report-title {
        font-size: 1.25rem;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .summary-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .stat-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
}

/* ===== CHARTS ===== */
.chart-container {
    width: 100%;
    height: 300px;
    min-height: 250px;
}

@media (max-width: 768px) {
    .chart-container {
        height: 250px;
        min-height: 200px;
    }
}

/* ===== COURSES STYLES ===== */
.badge-language {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-language.badge-inglés {
    background-color: #e3f2fd;
    color: #1565c0;
}

.badge-language.badge-francés {
    background-color: #fce4ec;
    color: #c2185b;
}

.badge-language.badge-alemán {
    background-color: #f3e5f5;
    color: #7b1fa2;
}

.badge-language.badge-portugués {
    background-color: #e8f5e8;
    color: #388e3c;
}

.badge-language.badge-italiano {
    background-color: #fff3e0;
    color: #f57c00;
}

.badge-level {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-weight: 600;
}

.badge-level.badge-principiante {
    background-color: #e8f5e8;
    color: #2e7d32;
}

.badge-level.badge-intermedio {
    background-color: #fff3e0;
    color: #f57c00;
}

.badge-level.badge-avanzado {
    background-color: #ffebee;
    color: #d32f2f;
}

.badge-status {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-weight: 600;
    text-transform: capitalize;
}

.badge-status.badge-planificado {
    background-color: #e3f2fd;
    color: #1565c0;
}

.badge-status.badge-activo {
    background-color: #e8f5e8;
    color: #2e7d32;
}

.badge-status.badge-finalizado {
    background-color: #f3e5f5;
    color: #7b1fa2;
}

.badge-status.badge-cancelado {
    background-color: #ffebee;
    color: #d32f2f;
}

.students-count {
    font-weight: 600;
    color: var(--text-secondary);
}

/* Form textarea */
.form-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    background: var(--white);
    color: var(--text-primary);
    transition: var(--transition);
    resize: vertical;
    min-height: 80px;
}

.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-textarea.error {
    border-color: var(--danger-color);
    background-color: #fef2f2;
}

/* Course code validation styles */
#course-code {
    text-transform: uppercase;
    font-family: 'Monaco', 'Menlo', monospace;
    font-weight: 600;
}

/* Responsive table improvements for courses */
@media (max-width: 768px) {
    .data-table th,
    .data-table td {
        padding: 0.5rem 0.25rem;
        font-size: 0.85rem;
    }
    
    .badge-language,
    .badge-level,
    .badge-status {
        font-size: 0.7rem;
        padding: 0.2rem 0.4rem;
    }
    
    .btn-sm {
        padding: 0.25rem 0.5rem;
    }
    
    .btn-sm i {
        font-size: 0.8rem;
    }
}

/* ===== INSTRUCTOR SELECT STYLES ===== */
.instructor-select {
    position: relative;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236366f1'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M16 7a4 4 0 11-8 0 4 4 0 018 0zM12 14a7 7 0 00-7 7h14a7 7 0 00-7-7z'/%3E%3C/svg%3E");
    background-position: 1rem center;
    background-repeat: no-repeat;
    background-size: 1.2rem;
    padding-left: 3rem;
}

.instructor-select option {
    padding: 0.75rem;
    font-size: 0.95rem;
}

.instructor-select option:hover {
    background: var(--primary-light);
}

.instructor-select.has-value {
    background-color: var(--success-light);
    border-color: var(--success-color);
}

.instructor-select:invalid {
    border-color: var(--danger-color);
    background-color: var(--danger-light);
}

/* Estilos para opciones de instructor */
.instructor-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    font-size: 0.95rem;
}

.instructor-option .instructor-info {
    flex: 1;
}

.instructor-option .instructor-name {
    font-weight: 600;
    color: var(--text-primary);
}

.instructor-option .instructor-specialties {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.instructor-option .instructor-status {
    font-size: 0.75rem;
    padding: 0.2rem 0.5rem;
    border-radius: 0.5rem;
    background: var(--success-light);
    color: var(--success-dark);
}

/* Loading state */
.instructor-select.loading {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M12 6V4m0 16v-2m6-6h2M4 12h2m13.657-5.657l1.414 1.414M4.929 4.929l1.414 1.414m0 11.314l1.414-1.414M4.929 19.071l1.414-1.414'/%3E%3C/svg%3E");
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}