/**
 * Akademik Üçgen Muhasebe Sistemi
 * Modern CSS Tasarım Dosyası
 */

/* Ana Renkler */
:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-warning: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --gradient-danger: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow-md: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    --border-radius: 0.5rem;
    --transition: all 0.3s ease;
}

/* Genel Stil */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    line-height: 1.6;
}

/* Navbar Özelleştirme */
.navbar {
    box-shadow: var(--shadow-md);
    background: var(--gradient-primary) !important;
    border-bottom: 3px solid rgba(255, 255, 255, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    border-radius: var(--border-radius);
    margin: 0 0.25rem;
}

.nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
    font-weight: 600;
}

/* Kart Tasarımları */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
}

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

.card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 2px solid #dee2e6;
    font-weight: 600;
}

/* Özel Kart Stilleri */
.card.bg-primary {
    background: var(--gradient-primary) !important;
    border: none;
}

.card.bg-success {
    background: var(--gradient-success) !important;
    border: none;
}

.card.bg-warning {
    background: var(--gradient-warning) !important;
    border: none;
}

.card.bg-danger {
    background: var(--gradient-danger) !important;
    border: none;
}

/* Buton Özelleştirmeleri */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

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

.btn-primary {
    background: var(--gradient-primary);
}

.btn-success {
    background: var(--gradient-success);
}

.btn-warning {
    background: var(--gradient-warning);
}

.btn-danger {
    background: var(--gradient-danger);
}

/* Form Özelleştirmeleri */
.form-control, .form-select {
    border-radius: var(--border-radius);
    border: 2px solid #e9ecef;
    transition: var(--transition);
    padding: 0.75rem 1rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
    transform: scale(1.02);
}

.form-label {
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 0.5rem;
}

/* Tablo Özelleştirmeleri */
.table {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table thead th {
    border: none;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.5px;
}

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

.table tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.05);
    transform: scale(1.01);
}

.table-dark {
    background: var(--gradient-primary);
}

/* Badge Özelleştirmeleri */
.badge {
    border-radius: var(--border-radius);
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    font-size: 0.75rem;
}

/* Alert Özelleştirmeleri */
.alert {
    border: none;
    border-radius: var(--border-radius);
    border-left: 4px solid;
    box-shadow: var(--shadow-sm);
}

.alert-success {
    border-left-color: var(--success-color);
    background: linear-gradient(135deg, #d1edff 0%, #a8e6cf 100%);
}

.alert-danger {
    border-left-color: var(--danger-color);
    background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 100%);
}

.alert-warning {
    border-left-color: var(--warning-color);
    background: linear-gradient(135deg, #fdcb6e 0%, #e17055 100%);
}

.alert-info {
    border-left-color: var(--info-color);
    background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
}

/* List Group Özelleştirmeleri */
.list-group-item {
    border: none;
    border-bottom: 1px solid #e9ecef;
    transition: var(--transition);
    padding: 1rem;
}

.list-group-item:hover {
    background-color: rgba(13, 110, 253, 0.05);
    transform: translateX(5px);
}

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

/* Breadcrumb Özelleştirmeleri */
.breadcrumb {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow-sm);
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb-item a:hover {
    color: var(--dark-color);
    transform: scale(1.05);
}

/* Animasyonlar */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

/* Responsive Tasarım */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .btn-group .btn {
        padding: 0.375rem 0.5rem;
        font-size: 0.75rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    h4 {
        font-size: 1.25rem;
    }
}

@media (max-width: 576px) {
    .col-md-3, .col-md-4, .col-md-6, .col-md-8 {
        margin-bottom: 1rem;
    }
    
    .btn-group {
        display: flex;
        flex-direction: column;
    }
    
    .btn-group .btn {
        margin-bottom: 0.25rem;
        border-radius: var(--border-radius) !important;
    }
    
    .table {
        font-size: 0.75rem;
    }
    
    .card-body h4 {
        font-size: 1rem;
    }
}

/* Dark Mode Desteği */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #ffffff;
    }
    
    .card {
        background-color: #2d2d2d;
        color: #ffffff;
    }
    
    .form-control, .form-select {
        background-color: #3d3d3d;
        border-color: #555;
        color: #ffffff;
    }
    
    .table {
        background-color: #2d2d2d;
        color: #ffffff;
    }
}

/* Özel Yardımcı Sınıflar */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.shadow-custom {
    box-shadow: var(--shadow-lg);
}

.border-gradient {
    border: 2px solid;
    border-image: var(--gradient-primary) 1;
}

.hover-scale:hover {
    transform: scale(1.05);
    transition: var(--transition);
}

/* Loading Spinner */
.spinner-custom {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Tooltip Özelleştirmeleri */
.tooltip-inner {
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
    font-weight: 500;
}

/* Scrollbar Özelleştirmeleri */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: var(--border-radius);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-primary);
    border-radius: var(--border-radius);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}