/* Kafka Dil Akademisi Renk Paleti */
:root {
    --kafka-primary: #1a237e;
    --kafka-primary-light: #283593;
    --kafka-secondary: #1976d2;
    --kafka-accent: #2196f3;
    --kafka-success: #4caf50;
    --kafka-warning: #ff9800;
    --kafka-danger: #f44336;
    --kafka-light: #f5f5f5;
    --kafka-dark: #212121;
    --kafka-text: #424242;
    --kafka-card-bg: #ffffff;
    --kafka-border: #e0e0e0;
    --kafka-shadow: rgba(0, 0, 0, 0.1);
}

/* Temel Stiller */
body {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
    color: var(--kafka-text);
}

/* Navbar */
.navbar-dark.bg-primary {
    background: linear-gradient(135deg, var(--kafka-primary) 0%, var(--kafka-primary-light) 100%) !important;
    box-shadow: 0 2px 10px rgba(26, 35, 126, 0.3);
}

.navbar-brand {
    font-weight: bold;
    color: white !important;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: white !important;
}

/* Kartlar */
.card {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease-in-out;
    border-radius: 0.75rem;
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    font-weight: 600;
    color: var(--kafka-text);
    padding: 1.25rem 1.5rem;
}

/* Butonlar */
.btn {
    border-radius: 0.5rem;
    transition: all 0.3s ease-in-out;
    font-weight: 500;
    border: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background: linear-gradient(135deg, var(--kafka-primary) 0%, var(--kafka-primary-light) 100%);
    border-color: var(--kafka-primary);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--kafka-secondary) 0%, var(--kafka-accent) 100%);
    border-color: var(--kafka-secondary);
}

.btn-success {
    background: linear-gradient(135deg, var(--kafka-success) 0%, #66bb6a 100%);
    border-color: var(--kafka-success);
}

.btn-warning {
    background: linear-gradient(135deg, var(--kafka-warning) 0%, #ffb74d 100%);
    border-color: var(--kafka-warning);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, var(--kafka-danger) 0%, #ef5350 100%);
    border-color: var(--kafka-danger);
}

/* Form Stilleri */
.form-control:focus,
.form-select:focus {
    border-color: var(--kafka-primary);
    box-shadow: 0 0 0 0.25rem rgba(26, 35, 126, 0.25);
}

/* Alert Stilleri */
.alert {
    border-radius: 0.375rem;
}

.alert-primary {
    background-color: rgba(26, 35, 126, 0.1);
    border-color: var(--kafka-primary);
    color: var(--kafka-primary);
}

.alert-success {
    background-color: rgba(76, 175, 80, 0.1);
    border-color: var(--kafka-success);
    color: var(--kafka-success);
}

.alert-warning {
    background-color: rgba(255, 152, 0, 0.1);
    border-color: var(--kafka-warning);
    color: var(--kafka-warning);
}

.alert-danger {
    background-color: rgba(244, 67, 54, 0.1);
    border-color: var(--kafka-danger);
    color: var(--kafka-danger);
}

/* Tablo Stilleri */
.table th {
    background-color: var(--kafka-light);
    border-top: none;
    font-weight: 600;
    color: var(--kafka-text);
}

.table-hover tbody tr:hover {
    background-color: rgba(26, 35, 126, 0.05);
}

/* Badge Stilleri */
.badge {
    font-size: 0.75em;
}

.badge-primary { background-color: var(--kafka-primary); }
.badge-secondary { background-color: var(--kafka-secondary); }
.badge-success { background-color: var(--kafka-success); }
.badge-warning { background-color: var(--kafka-warning); }
.badge-danger { background-color: var(--kafka-danger); }

/* İstatistik Kartları - Uyumlu Renkler */
.stats-card-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3) !important;
}

.stats-card-secondary {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 15px rgba(240, 147, 251, 0.3) !important;
}

.stats-card-success {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.3) !important;
}

.stats-card-warning {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 15px rgba(67, 233, 123, 0.3) !important;
}

/* Ortak stiller */
.stats-card-primary,
.stats-card-secondary,
.stats-card-success,
.stats-card-warning {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.stats-card-primary .card-body,
.stats-card-secondary .card-body,
.stats-card-success .card-body,
.stats-card-warning .card-body {
    color: white !important;
    position: relative;
    z-index: 2;
    padding: 1.5rem;
}

.stats-card-primary .card-title,
.stats-card-secondary .card-title,
.stats-card-success .card-title,
.stats-card-warning .card-title {
    color: rgba(255, 255, 255, 0.95) !important;
    font-weight: 600;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    margin-bottom: 0.5rem;
}

.stats-card-primary h2,
.stats-card-secondary h2,
.stats-card-success h2,
.stats-card-warning h2 {
    color: white !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    font-weight: 700;
    font-size: 2.5rem;
}

.stats-card-primary i,
.stats-card-secondary i,
.stats-card-success i,
.stats-card-warning i {
    color: rgba(255, 255, 255, 0.9) !important;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    font-size: 3rem;
}

/* Hover efektleri */
.stats-card-primary:hover,
.stats-card-secondary:hover,
.stats-card-success:hover,
.stats-card-warning:hover {
    transform: translateY(-5px) !important;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2) !important;
}

/* Modal Stilleri */
.modal-content {
    border-radius: 0.5rem;
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.modal-header,
.modal-footer {
    background-color: var(--kafka-light);
}

/* Admin Dashboard */
.admin-dashboard-bg {
    background: linear-gradient(135deg, var(--kafka-light) 0%, #e9ecef 100%);
    min-height: 100vh;
    padding: 2rem 0;
}

/* Login Header */
.login-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 15px 15px 0 0 !important;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

/* Kurs Yönetimi Sayfası Özel Stilleri */
.course-management-container {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
    padding: 2rem 0;
}

.course-card {
    background: var(--kafka-card-bg);
    border: 1px solid var(--kafka-border);
    border-radius: 0.75rem;
    box-shadow: 0 2px 8px var(--kafka-shadow);
    transition: all 0.3s ease-in-out;
    overflow: hidden;
    height: 100%;
    position: relative;
}

.course-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    border-color: var(--kafka-primary);
}

.course-card .card-body {
    padding: 1rem;
}

.course-card .card-title {
    color: var(--kafka-primary);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    border-bottom: 1px solid var(--kafka-primary);
    padding-bottom: 0.25rem;
}

.course-card .card-text {
    color: var(--kafka-text);
    line-height: 1.4;
    font-size: 0.9rem;
}

.course-card .card-text strong {
    color: var(--kafka-primary);
    font-weight: 600;
}

.course-info-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 0.375rem;
    padding: 0.75rem;
    margin: 0.75rem 0;
    border-left: 3px solid var(--kafka-primary);
}

.course-schedule-item {
    background: white;
    border-radius: 0.25rem;
    padding: 0.5rem;
    margin: 0.125rem 0;
    border-left: 2px solid var(--kafka-accent);
    transition: all 0.2s ease;
    font-size: 0.85rem;
}

.course-schedule-item:hover {
    background: var(--kafka-light);
    transform: translateX(1px);
}

.payment-status-section {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    border-radius: 0.375rem;
    padding: 0.75rem;
    margin: 0.75rem 0;
    border: 1px solid #ffc107;
}

.payment-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.25rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    font-size: 0.85rem;
}

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

.payment-label {
    color: var(--kafka-text);
    font-weight: 500;
}

.payment-value {
    font-weight: 600;
    font-size: 0.95rem;
}

.payment-value.pending {
    color: var(--kafka-warning);
}

.payment-value.completed {
    color: var(--kafka-success);
}

.payment-value.total {
    color: var(--kafka-primary);
}

.course-card .card-footer {
    background: linear-gradient(135deg, var(--kafka-light) 0%, #e9ecef 100%);
    border-top: 1px solid var(--kafka-border);
    padding: 0.75rem 1rem;
}

.course-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.course-actions .btn {
    border-radius: 0.375rem;
    font-weight: 500;
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

.course-actions .btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.12);
}

.course-actions .btn-group {
    display: flex;
    gap: 0.25rem;
}

.course-actions .btn-group .btn {
    border-radius: 0.25rem;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
}

/* Modal Stilleri - Kurs Yönetimi */
.course-modal .modal-content {
    border-radius: 1rem;
    border: none;
    box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.2);
}

.course-modal .modal-header {
    background: linear-gradient(135deg, var(--kafka-primary) 0%, var(--kafka-primary-light) 100%);
    color: white;
    border-radius: 1rem 1rem 0 0;
    padding: 1.5rem;
}

.course-modal .modal-title {
    font-weight: 700;
    color: white;
}

.course-modal .modal-body {
    padding: 2rem;
}

.course-modal .form-label {
    font-weight: 600;
    color: var(--kafka-text);
    margin-bottom: 0.5rem;
}

.course-modal .form-control,
.course-modal .form-select {
    border-radius: 0.5rem;
    border: 2px solid var(--kafka-border);
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.course-modal .form-control:focus,
.course-modal .form-select:focus {
    border-color: var(--kafka-primary);
    box-shadow: 0 0 0 0.25rem rgba(26, 35, 126, 0.15);
}

.course-modal .form-check-input:checked {
    background-color: var(--kafka-primary);
    border-color: var(--kafka-primary);
}

.course-modal .modal-footer {
    background: var(--kafka-light);
    border-top: 1px solid var(--kafka-border);
    padding: 1.5rem;
    border-radius: 0 0 1rem 1rem;
}

/* Ders Saati Ekleme Bölümü */
.schedule-row {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 2px solid var(--kafka-border) !important;
    border-radius: 0.75rem !important;
    transition: all 0.3s ease;
}

.schedule-row:hover {
    border-color: var(--kafka-primary) !important;
    box-shadow: 0 4px 12px rgba(26, 35, 126, 0.1);
}

.schedule-row .form-label {
    font-weight: 600;
    color: var(--kafka-primary);
    margin-bottom: 0.5rem;
}

/* Grafik Konteyner */
.chart-container {
    background: white;
    border-radius: 0.375rem;
    padding: 0.75rem;
    margin-top: 0.75rem;
    border: 1px solid var(--kafka-border);
}

/* Boş Durum Stilleri */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 4px 12px var(--kafka-shadow);
}

.empty-state i {
    color: var(--kafka-text);
    opacity: 0.5;
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-state h4 {
    color: var(--kafka-text);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--kafka-text);
    opacity: 0.7;
    margin-bottom: 1.5rem;
}

/* Badge Stilleri - Güncellenmiş */
.badge {
    font-size: 0.75em;
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
}

.badge.bg-success {
    background: linear-gradient(135deg, var(--kafka-success) 0%, #66bb6a 100%) !important;
    color: white;
}

.badge.bg-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%) !important;
    color: white;
}

/* Responsive Tasarım */
@media (max-width: 768px) {
    .stats-card-primary h2,
    .stats-card-secondary h2,
    .stats-card-success h2,
    .stats-card-warning h2 {
        font-size: 2rem;
    }
    
    .stats-card-primary i,
    .stats-card-secondary i,
    .stats-card-success i,
    .stats-card-warning i {
        font-size: 2.5rem;
    }
    
    .card-body {
        padding: 1rem;
    }

    .course-card .card-body {
        padding: 1rem;
    }
    
    .course-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .course-actions .btn-group {
        width: 100%;
        justify-content: center;
    }
    
    .course-modal .modal-body {
        padding: 1rem;
    }
    
    .course-modal .modal-footer {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .course-card .card-title {
        font-size: 1.1rem;
    }
    
    .payment-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
    }
    
    .course-schedule-item {
        padding: 0.5rem;
    }
}

/* Hızlı İşlemler Bölümü Stilleri */
.quick-actions-container {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
    padding: 2rem 0;
}

.quick-action-card {
    background: var(--kafka-card-bg);
    border: 1px solid var(--kafka-border);
    border-radius: 0.75rem;
    box-shadow: 0 3px 10px var(--kafka-shadow);
    transition: all 0.3s ease-in-out;
    overflow: hidden;
    height: 100%;
    position: relative;
    text-decoration: none !important;
    color: inherit;
}

.quick-action-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--kafka-primary);
    text-decoration: none !important;
    color: inherit;
}

.quick-action-card .card-body {
    padding: 1.5rem 1rem;
    text-align: center;
}

.quick-action-card .action-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.quick-action-card:hover .action-icon {
    transform: scale(1.1);
}

.quick-action-card .action-title {
    color: var(--kafka-primary);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
}

.quick-action-card:hover .action-title {
    color: var(--kafka-primary-light);
}

.quick-action-card .action-description {
    color: var(--kafka-text);
    font-size: 0.85rem;
    line-height: 1.4;
    opacity: 0.8;
}

/* Hızlı İşlemler Kart Renkleri */
.quick-action-card.students {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-color: #2196f3;
}

.quick-action-card.students .action-icon {
    color: #1976d2;
}

.quick-action-card.students .action-title {
    color: #1565c0;
}

.quick-action-card.students:hover {
    background: linear-gradient(135deg, #bbdefb 0%, #90caf9 100%);
    border-color: #1976d2;
}

.quick-action-card.courses {
    background: linear-gradient(135deg, #e8f5e8 0%, #c8e6c9 100%);
    border-color: #4caf50;
}

.quick-action-card.courses .action-icon {
    color: #388e3c;
}

.quick-action-card.courses .action-title {
    color: #2e7d32;
}

.quick-action-card.courses:hover {
    background: linear-gradient(135deg, #c8e6c9 0%, #a5d6a7 100%);
    border-color: #388e3c;
}

.quick-action-card.payments {
    background: linear-gradient(135deg, #fff3e0 0%, #ffcc02 100%);
    border-color: #ff9800;
}

.quick-action-card.payments .action-icon {
    color: #f57c00;
}

.quick-action-card.payments .action-title {
    color: #ef6c00;
}

.quick-action-card.payments:hover {
    background: linear-gradient(135deg, #ffcc02 0%, #ffb300 100%);
    border-color: #f57c00;
}

/* Hızlı İşlemler Header */
.quick-actions-header {
    background: linear-gradient(135deg, var(--kafka-primary) 0%, var(--kafka-primary-light) 100%);
    color: white;
    border-radius: 1rem 1rem 0 0;
    padding: 1.5rem;
    margin-bottom: 0;
}

.quick-actions-header h5 {
    color: white;
    font-weight: 700;
    margin: 0;
}

.quick-actions-header i {
    color: var(--kafka-warning);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Hızlı İşlemler Konteyner */
.quick-actions-section {
    background: white;
    border-radius: 1rem;
    box-shadow: 0 4px 12px var(--kafka-shadow);
    overflow: hidden;
    border: 1px solid var(--kafka-border);
}

.quick-actions-body {
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* Responsive Hızlı İşlemler */
@media (max-width: 768px) {
    .quick-action-card .card-body {
        padding: 1.5rem 1rem;
    }
    
    .quick-action-card .action-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
    }
    
    .quick-action-card .action-title {
        font-size: 1.1rem;
    }
    
    .quick-actions-body {
        padding: 1.5rem;
    }
}

@media (max-width: 576px) {
    .quick-action-card .action-icon {
        font-size: 2rem;
    }
    
    .quick-action-card .action-title {
        font-size: 1rem;
    }
    
    .quick-action-card .action-description {
        font-size: 0.8rem;
    }
    
    .quick-actions-body {
        padding: 1rem;
    }
}