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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --text-color: #2c3e50;
    --light-gray: #ecf0f1;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-gray);
    line-height: 1.6;
    color: var(--text-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Login styles */
.login-container {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    max-width: 400px;
    margin: 50px auto;
}

/* Dashboard styles */
.dashboard {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.dashboard h2 {
    color: var(--primary-color);
    font-size: 24px;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light-gray);
}

.search-section {
    background: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.search-section h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 20px;
}

.vehicle-info {
    background: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.vehicle-info h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 20px;
}

.service-history {
    background: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.service-history h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 20px;
}

.service-record {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    background: var(--light-gray);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.service-date,
.service-km,
.service-desc,
.service-parts {
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.service-date i,
.service-km i,
.service-desc i,
.service-parts i {
    color: var(--secondary-color);
    font-size: 20px;
    margin-top: 3px;
}

.no-records {
    text-align: center;
    padding: 30px;
    background: var(--light-gray);
    border-radius: 8px;
    color: var(--text-color);
}

.no-records i {
    font-size: 24px;
    color: var(--secondary-color);
    margin-right: 10px;
}

.form-group {
    position: relative;
}

.form-group input {
    padding-right: 40px;
}

.form-group button {
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    border-radius: 0 8px 8px 0;
}

.form-group button i {
    margin-right: 5px;
}

i {
    margin-right: 8px;
}

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

.form-group input {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    border-color: var(--secondary-color);
    outline: none;
}

button {
    background: var(--secondary-color);
    color: var(--white);
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
}

button:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #2980b9;
    text-decoration: none;
}

.error-message {
    background-color: #fff3f3;
    color: var(--accent-color);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid #ffd7d7;
}

.success-message {
    background-color: #f0fff4;
    color: #2ecc71;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid #d4f5e2;
}

.logout {
    text-align: right;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid var(--light-gray);
}

.logout a {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--accent-color);
    color: var(--white);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.logout a:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light-gray);
}

.dashboard-header h2 {
    margin: 0;
    padding: 0;
    border: none;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.info-item {
    background: var(--light-gray);
    padding: 15px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: transform 0.2s ease;
}

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

.info-item i {
    font-size: 24px;
    color: var(--secondary-color);
}

.info-item p {
    margin: 0;
}

/* Responsive tasarım */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .dashboard {
        padding: 20px;
    }
    
    .search-section,
    .vehicle-info,
    .service-history {
        padding: 15px;
    }
    
    .service-record {
        grid-template-columns: 1fr;
    }
    
    .form-group button {
        position: static;
        margin-top: 10px;
        border-radius: 8px;
    }
    
    .dashboard-header {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }
    
    button {
        width: 100%;
    }
}

/* Sol Menü Stilleri */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    background: var(--primary-color);
    color: var(--white);
    padding: 20px;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px 0;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 20px;
}

.sidebar-header h2 {
    color: var(--white);
    font-size: 24px;
    margin: 0;
    padding: 0;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu li {
    margin-bottom: 5px;
}

.sidebar-menu a {
    color: var(--white);
    text-decoration: none;
    padding: 12px 15px;
    display: flex;
    align-items: center;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.sidebar-menu a:hover {
    background: rgba(255,255,255,0.1);
}

.sidebar-menu a.active {
    background: var(--secondary-color);
}

.sidebar-menu i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.main-content {
    flex: 1;
    margin-left: 280px;
    padding: 20px;
    background: var(--light-gray);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-card i {
    font-size: 32px;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.stat-card h3 {
    font-size: 28px;
    color: var(--primary-color);
    margin: 10px 0;
}

.stat-card p {
    color: var(--text-color);
    margin: 0;
    font-size: 14px;
}

/* Tablo Stilleri */
.table-container {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    overflow-x: auto;
}

.table-container h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.table-container h3 i {
    margin-right: 10px;
}

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

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--light-gray);
}

th {
    background: var(--light-gray);
    color: var(--primary-color);
    font-weight: 600;
}

tr:hover {
    background: rgba(236, 240, 241, 0.3);
}

.action-buttons {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 8px 15px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: all 0.3s ease;
    font-size: 14px;
}

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

.btn-success {
    background: #2ecc71;
    color: var(--white);
}

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

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

/* Responsive Düzenlemeler */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }

    .main-content {
        margin-left: 0;
    }

    .admin-layout {
        flex-direction: column;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.form-actions {
    grid-column: 1 / -1;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.form-actions button,
.form-actions .btn {
    min-width: 120px;
}

.badge {
    background: var(--accent-color);
    color: var(--white);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    margin-left: 5px;
}

/* Responsive düzenlemeler için ek kurallar */
@media (max-width: 768px) {
    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions button,
    .form-actions .btn {
        width: 100%;
    }
}