/* --- ADMIN TABS --- */
.tab-btn {
    flex: 1; padding: 1.2rem; border: none; background: none;
    font-weight: 800; font-size: 0.75rem; color: var(--text-muted);
    cursor: pointer; border-bottom: 3px solid transparent;
    transition: var(--transition);
}
.tab-btn:hover { background: rgba(52, 51, 68, 0.05); }
.tab-btn.active { color: var(--text); border-bottom-color: var(--primary); background: white; }

.tab-pane { display: none; }
.tab-pane.active { display: block; animation: fadeIn 0.3s ease; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }

.admin-user-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.admin-user-summary-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 1rem;
    padding: 1.2rem 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.admin-user-summary-card strong {
    font-size: 1.9rem;
    font-weight: 900;
    color: var(--text);
}

.admin-user-summary-card span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.admin-user-summary-warning {
    background: #fff7ed;
    border-color: #fdba74;
}

.admin-user-summary-muted {
    background: #f8fafc;
    border-color: #cbd5e1;
}

.admin-user-section {
    margin-bottom: 2rem;
}

.admin-user-section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.admin-user-section-header h3 {
    margin: 0 0 0.25rem;
    font-weight: 900;
}

.admin-user-section-header p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 760px;
}

.admin-user-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.admin-user-card.is-active {
    border-color: #e5e7eb;
}

.admin-user-card.is-warning {
    background: #fffaf0;
    border-color: #fdba74 !important;
}

.admin-user-card.is-former {
    background: #f8fafc;
    border-color: #cbd5e1 !important;
    opacity: 0.92;
}

.admin-user-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.9rem;
}

.admin-user-meta span {
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    border-radius: 999px;
    padding: 0.35rem 0.65rem;
    font-size: 0.72rem;
    font-weight: 700;
    color: #334155;
}

.admin-user-warning-text {
    margin: 0.9rem 0 0;
    font-size: 0.8rem;
    font-weight: 700;
    color: #c2410c;
}

.admin-user-former-text {
    margin: 0.9rem 0 0;
    font-size: 0.8rem;
    font-weight: 700;
    color: #475569;
}

/* ===== ADMIN RESPONSIVE ===== */
@media (max-width: 768px) {
    /* Admin Tabs Horizontally Scrollable */
    .admin-tabs,
    [style*="display: flex"][style*="border-bottom"] {
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        gap: 0 !important;
        padding-bottom: 0 !important;
        border-bottom: 1px solid #edf2f7 !important;
    }
    
    .tab-btn {
        flex-shrink: 0 !important;
        padding: 12px 16px !important;
        font-size: 0.7rem !important;
        white-space: nowrap !important;
        min-width: auto !important;
        border-radius: 0 !important;
    }
    
    /* Admin Content */
    .admin-content,
    .tab-pane {
        padding: 15px !important;
    }
    
    /* Admin Grid */
    .admin-grid {
        grid-template-columns: 1fr !important;
        gap: 12px !important;
    }
    
    /* Student List */
    .student-list {
        display: flex !important;
        flex-direction: column !important;
        gap: 10px !important;
    }
    
    .student-item {
        padding: 15px !important;
        border-radius: 12px !important;
    }
    
    .student-item .student-actions {
        margin-top: 10px !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 8px !important;
    }
    
    .student-item .student-actions button {
        width: 100% !important;
        min-height: 44px !important;
    }
    
    /* Student File */
    .student-file-header {
        flex-direction: column !important;
        text-align: center !important;
        gap: 15px !important;
    }
    
    .student-file-header img {
        width: 80px !important;
        height: 80px !important;
    }
    
    .student-file-actions {
        display: flex !important;
        flex-direction: column !important;
        gap: 8px !important;
        width: 100% !important;
    }
    
    .student-file-actions button {
        width: 100% !important;
    }
    
    /* Student Tabs */
    .student-tabs {
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        gap: 5px !important;
        padding-bottom: 10px !important;
        margin-bottom: 15px !important;
    }
    
    .student-tabs button {
        flex-shrink: 0 !important;
        min-width: auto !important;
        padding: 10px 14px !important;
        font-size: 0.7rem !important;
        white-space: nowrap !important;
        border-radius: 20px !important;
    }
    
    /* Admin Calendar */
    .calendar-admin-container {
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
    }
    
    .calendar-admin-grid {
        min-width: 500px !important;
    }
    
    /* Admin Forms */
    .admin-form {
        padding: 15px !important;
    }
    
    .admin-form .form-row {
        flex-direction: column !important;
        gap: 15px !important;
    }
    
    .admin-form input,
    .admin-form select,
    .admin-form textarea {
        width: 100% !important;
        font-size: 16px !important;
        padding: 14px !important;
        min-height: 48px !important;
    }
    
    .admin-form button {
        width: 100% !important;
        min-height: 48px !important;
    }
    
    /* Admin Stats */
    .admin-stats {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 10px !important;
    }
    
    .admin-stat-card {
        padding: 12px !important;
        text-align: center !important;
    }
    
    .admin-stat-value {
        font-size: 1.4rem !important;
    }
    
    .admin-stat-label {
        font-size: 0.65rem !important;
    }
    
    /* Admin Tables */
    .admin-table-container {
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        margin: 0 -15px !important;
        padding: 0 15px !important;
    }
    
    .admin-table {
        min-width: 500px !important;
        font-size: 0.75rem !important;
    }
    
    .admin-table th,
    .admin-table td {
        padding: 10px 8px !important;
    }
    
    /* Exercise Editor */
    .exercise-editor {
        padding: 15px !important;
    }
    
    .exercise-editor .exercise-fields {
        display: flex !important;
        flex-direction: column !important;
        gap: 15px !important;
    }
    
    /* Planning Section */
    .planning-container {
        padding: 10px !important;
    }
    
    .planning-week-header {
        flex-direction: column !important;
        gap: 10px !important;
        text-align: center !important;
    }
    
    .planning-day {
        padding: 12px !important;
    }
    
    /* Analytics Charts */
    .analytics-chart-container {
        height: 200px !important;
        overflow-x: auto !important;
    }
    
    .analytics-grid {
        grid-template-columns: 1fr !important;
    }

    .admin-user-section-header {
        flex-direction: column !important;
        align-items: stretch !important;
    }

    .admin-user-grid {
        grid-template-columns: 1fr !important;
    }
}

@media (max-width: 480px) {
    .admin-stats {
        grid-template-columns: 1fr !important;
    }
    
    .tab-btn {
        padding: 10px 12px !important;
        font-size: 0.65rem !important;
    }
    
    .student-tabs button {
        padding: 8px 12px !important;
        font-size: 0.65rem !important;
    }
}