/* Genel Stil */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --border-color: #e5e7eb;
    --text-color: #111827;
    --text-light: #6b7280;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-color);
}

/* Login Sayfası */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-box {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.login-box h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--dark-color);
    font-size: 24px;
}

.login-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-light);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

.login-form {
    display: none;
}

.login-form.active {
    display: block;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

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

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
}

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

.btn-primary:hover {
    background-color: #4f46e5;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.alert {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

/* Ana Layout */
.header {
    background: white;
    border-bottom: 1px solid var(--border-color);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header h2 {
    font-size: 18px;
    color: var(--dark-color);
}

.header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-light);
    font-size: 13px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

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

.btn-danger:hover {
    background-color: #dc2626;
}

/* Tab Navigation (Mobil) */
.tab-navigation {
    display: flex;
    overflow-x: auto;
    background: white;
    border-bottom: 1px solid var(--border-color);
    padding: 0 10px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.tab-navigation::-webkit-scrollbar {
    display: none;
}

.tab-item {
    padding: 15px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-light);
    white-space: nowrap;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
    position: relative;
}

.tab-item.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

.tab-item:active {
    background-color: var(--light-color);
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 20px;
}

.tab-content.active {
    display: block;
}

/* Kartlar */
.card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark-color);
}

/* Tablo */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    background-color: var(--light-color);
    font-weight: 600;
    color: var(--text-color);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table tr:hover {
    background-color: #f9fafb;
}

/* Form */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

.btn-secondary {
    background-color: var(--border-color);
    color: var(--text-color);
}

.btn-secondary:hover {
    background-color: #d1d5db;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background-color: #dbeafe;
    color: #1e40af;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 12px;
    padding: 30px;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-content.wide {
    max-width: 900px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Responsive */
@media (min-width: 768px) {
    .tab-navigation {
        flex-wrap: wrap;
        padding: 0 20px;
    }
    
    .tab-content {
        padding: 20px;
    }
    
    /* Desktop'ta tab'lar yan yana, mobilde scroll */
    .desktop-tabs {
        display: grid;
        grid-template-columns: 250px 1fr;
        gap: 20px;
    }
    
    .desktop-tabs .tab-navigation {
        flex-direction: column;
        border-right: 1px solid var(--border-color);
        border-bottom: none;
        padding: 20px 0;
    }
    
    .desktop-tabs .tab-item {
        text-align: left;
        border-bottom: none;
        border-left: 3px solid transparent;
        border-radius: 0;
    }
    
    .desktop-tabs .tab-item.active {
        border-left-color: var(--primary-color);
        background-color: var(--light-color);
    }
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-light);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 20px;
    opacity: 0.5;
}

/* Utility */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}

.hidden {
    display: none;
}