/* ==========================================================================
   Teacher Dashboard Styles
   ========================================================================== */

.teacher {
    padding: var(--spacing-lg) 0;
}

.teacher-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.teacher-header h1 {
    margin-bottom: 0;
    text-align: left;
}

/* Empty State */
.teacher-empty {
    text-align: center;
    padding: var(--spacing-xxl);
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.teacher-empty p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.teacher-empty-text {
    color: var(--color-text-muted);
    font-style: italic;
}

/* User Cards Grid */
.teacher-users {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.teacher-user-card {
    display: grid;
    grid-template-columns: auto 1fr auto auto auto;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    text-decoration: none;
    color: var(--color-text);
    transition: all var(--transition-normal);
}

.teacher-user-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    color: var(--color-text);
}

.teacher-user-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.teacher-user-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-full);
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.teacher-user-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.teacher-user-levels {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.teacher-level-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    background: var(--color-bg);
}

.teacher-level-en {
    background: rgba(59, 130, 246, 0.15);
    color: #1d4ed8;
}

.teacher-level-fr {
    background: rgba(139, 92, 246, 0.15);
    color: #6d28d9;
}

.teacher-level-es {
    background: rgba(239, 68, 68, 0.15);
    color: #b91c1c;
}

.teacher-level-it {
    background: rgba(34, 197, 94, 0.15);
    color: #15803d;
}

.teacher-level-default {
    background: var(--color-bg);
    color: var(--color-text-muted);
}

.teacher-user-stats {
    text-align: right;
}

.teacher-stat {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.teacher-stat-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
}

.teacher-stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.teacher-user-activity {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    min-width: 100px;
    text-align: right;
}

.teacher-user-arrow {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    transition: transform var(--transition-fast);
}

.teacher-user-card:hover .teacher-user-arrow {
    transform: translateX(4px);
    color: var(--color-primary);
}

/* Sections */
.teacher-section {
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow);
}

.teacher-section h2 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    border-bottom: 2px solid var(--color-border);
    padding-bottom: var(--spacing-sm);
}

/* Levels Grid */
.teacher-levels-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.teacher-level-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.teacher-level-row:last-child {
    border-bottom: none;
}

.teacher-level-lang {
    min-width: 100px;
    font-weight: 500;
}

.teacher-level-current {
    min-width: 40px;
    font-weight: 700;
    color: var(--color-primary);
}

.teacher-level-form {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.teacher-level-select {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    background: var(--color-bg-card);
}

.teacher-level-reset {
    margin-left: auto;
}

/* Learning Time Chart */
.teacher-chart {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.teacher-chart-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    height: 32px;
}

.teacher-chart-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
    border-radius: var(--border-radius-sm);
    min-width: 4px;
    transition: width var(--transition-normal);
}

.teacher-chart-bar-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    min-width: 120px;
}

.teacher-stat-total {
    margin-top: var(--spacing-md);
    font-weight: 600;
    color: var(--color-text);
}

/* Weak Words */
.teacher-weak-words {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.teacher-weak-word {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--border-radius-sm);
}

.teacher-weak-word-pair {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.teacher-weak-word-lang {
    background: var(--color-primary);
    color: white;
    padding: 2px var(--spacing-xs);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
}

.teacher-weak-word-stats {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Test History */
.teacher-test-history {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.teacher-test-entry {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
}

.teacher-test-passed {
    background: rgba(34, 197, 94, 0.1);
}

.teacher-test-failed {
    background: rgba(239, 68, 68, 0.1);
}

.teacher-test-date {
    min-width: 80px;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.teacher-test-lang {
    min-width: 30px;
    font-weight: 600;
    color: var(--color-primary);
}

.teacher-test-level {
    min-width: 30px;
    font-weight: 500;
}

.teacher-test-result {
    margin-left: auto;
    font-weight: 600;
}

.teacher-test-passed .teacher-test-result {
    color: var(--color-success);
}

.teacher-test-failed .teacher-test-result {
    color: var(--color-error);
}

/* Danger Section */
.teacher-section-danger {
    border: 2px solid var(--color-error-light);
}

.teacher-section-danger h2 {
    color: var(--color-error);
    border-bottom-color: var(--color-error-light);
}

.teacher-danger-hint {
    margin-top: var(--spacing-sm);
    margin-bottom: 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.teacher-danger-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.teacher-danger-action {
    flex: 1;
    min-width: 200px;
}

/* Danger Button */
.btn-danger {
    background: linear-gradient(135deg, var(--color-error) 0%, #dc2626 100%);
    color: white;
    border: none;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

/* ==========================================================================
   Responsive Teacher Styles
   ========================================================================== */

@media (max-width: 768px) {
    .teacher-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }

    .teacher-user-card {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .teacher-user-header {
        justify-content: flex-start;
    }

    .teacher-user-stats {
        text-align: left;
    }

    .teacher-stat {
        flex-direction: row;
        gap: var(--spacing-sm);
        align-items: baseline;
    }

    .teacher-user-activity {
        text-align: left;
    }

    .teacher-user-arrow {
        display: none;
    }

    .teacher-level-row {
        flex-wrap: wrap;
    }

    .teacher-level-form {
        width: 100%;
        margin-top: var(--spacing-xs);
    }

    .teacher-level-reset {
        margin-left: 0;
    }
}

@media (max-width: 600px) {
    .teacher {
        padding: var(--spacing-sm) 0;
    }

    .teacher-section {
        padding: var(--spacing-md);
        border-radius: var(--border-radius);
    }

    .teacher-user-card {
        padding: var(--spacing-md);
        border-radius: var(--border-radius);
    }

    .teacher-user-avatar {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-lg);
    }

    .teacher-weak-word {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }

    .teacher-test-entry {
        flex-wrap: wrap;
    }
}