/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* Renk Paleti ve Temel Ayarlar */
:root {
    --background-color: #121212;
    --surface-color: #1E1E1E;
    --primary-text-color: #EAEAEA;
    --secondary-text-color: #A0A0A0;
    --accent-color: #00A8F0;
    --border-color: #2a2a2a;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--primary-text-color);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

a {
    text-decoration: none;
    color: var(--accent-color);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Header ve Navigasyon */
header {
    padding: 1.5rem 0;
    position: absolute;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 10;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-text-color);
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--secondary-text-color);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary-text-color);
}

/* Ana Sayfa Hero Alanı */
.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-image: linear-gradient(rgba(0,0,0,0.6), rgba(18,18,18,1)), url(https://placehold.co/1920x1080/111111/555555?text=AutoHub);
    background-size: cover;
    background-position: center;
}

.hero-content h1 {
    font-size: 5rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    text-shadow: 0 4px 15px rgba(0,0,0,0.5);
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--secondary-text-color);
    max-width: 600px;
    margin: 0 auto 2.5rem auto;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: #000;
    background-color: var(--accent-color);
    border-radius: 8px;
    transition: all 0.3s;
}
.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 168, 240, 0.2);
}

/* Genel Sayfa Başlıkları */
.page-header {
    padding: 8rem 0 3rem 0;
    text-align: center;
}
.page-header h1 {
    font-size: 3rem;
    margin: 0;
}

/* Araç Listesi Kartları */
.car-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
}
.car-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s, border-color 0.3s;
}
.car-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}
.car-card a { color: inherit; }
.car-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}
.car-card .car-info { padding: 1.5rem; }
.car-card .car-info h3 { margin: 0 0 0.5rem 0; font-size: 1.25rem; color: var(--primary-text-color); }
.car-card .car-info p { margin: 0; color: var(--secondary-text-color); }
.car-card .ai-reason { font-size: 0.9rem; margin-top: 1rem; color: var(--accent-color); font-style: italic; }

/* Araç Detay Sayfası */
.car-detail-layout {
    display: grid;
    grid-template-columns: 2fr 1.2fr;
    gap: 3rem;
    padding-top: 8rem;
    align-items: flex-start;
}
.car-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}
.car-details-card {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}
.car-details-card .series { color: var(--accent-color); font-weight: 600; letter-spacing: 1px; text-transform: uppercase; }
.car-details-card h1 { font-size: 2.5rem; margin: 0.5rem 0 1rem 0; }
.car-details-card .price { font-size: 2rem; font-weight: 700; margin-bottom: 2rem; }
.car-details-card .description { color: var(--secondary-text-color); line-height: 1.6; margin-bottom: 2.5rem; }
.actions button {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s;
    border: none;
    margin-bottom: 1rem;
}
.actions .purchase-btn { background-color: var(--accent-color); color: #000; }
.actions .fav-btn { background-color: transparent; color: var(--primary-text-color); border: 2px solid #333; }
.actions .fav-btn:hover { border-color: var(--accent-color); color: var(--accent-color); }
.sold-out { text-align: center; color: #ff4d4d; font-weight: 600; }

/* AI Asistan Kutusu */
.ai-assistant-box {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin: 1rem 0 3rem 0;
    text-align: center;
}
.ai-assistant-box h2 { margin-top: 0; }
.ai-assistant-box form { display: flex; gap: 1rem; max-width: 700px; margin: 1rem auto 0 auto; }
.ai-assistant-box input {
    flex-grow: 1; padding: 0.75rem 1rem; border: 1px solid #333; border-radius: 8px; font-size: 1rem;
    background-color: var(--background-color); color: var(--primary-text-color);
}
.ai-assistant-box button { padding: 0.75rem 1.5rem; border: none; background-color: var(--accent-color); color: #000;
    border-radius: 8px; cursor: pointer; font-size: 1rem; font-weight: 600;
}

/* Form Sayfaları (Login/Register) */
.form-container { padding-top: 8rem; }
.user-form { max-width: 450px; margin: 2rem auto; padding: 2.5rem; background: var(--surface-color); border-radius: 12px; border: 1px solid var(--border-color); }
.user-form h1 { text-align: center; margin-bottom: 2rem; }
.user-form input {
    width: 100%; padding: 0.8rem 1rem; margin-bottom: 1.5rem; border: 1px solid #333; border-radius: 8px;
    background-color: var(--background-color); color: var(--primary-text-color); font-size: 1rem; box-sizing: border-box;
}
.user-form button {
    width: 100%; padding: 1rem; border: none; border-radius: 8px; background-color: var(--accent-color);
    color: #000; font-size: 1rem; font-weight: 600; cursor: pointer;
}
.error, .success { padding: 1rem; border-radius: 8px; margin-bottom: 1.5rem; text-align: center; }
.error { color: #ffcccc; background: #5c1f1f; border: 1px solid #a83c3c; }
.success { color: #ccffdd; background: #1f5c3b; border: 1px solid #3ca86a; }

/* Footer */
footer.site-footer { text-align: center; padding: 3rem 0; margin-top: 4rem; background-color: #000; color: var(--secondary-text-color); }

/* Filtreleme Bölümü */
.filter-section {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.filter-section h3 {
    margin: 0 0 1.5rem 0;
    color: var(--primary-text-color);
    font-size: 1.25rem;
    font-weight: 600;
}

.filter-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.filter-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-group label {
    font-weight: 500;
    color: var(--primary-text-color);
    font-size: 0.9rem;
}

.filter-group input,
.filter-group select {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--background-color);
    color: var(--primary-text-color);
    font-size: 0.9rem;
    transition: border-color 0.2s ease;
}

.filter-group input:focus,
.filter-group select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(0, 168, 240, 0.1);
}

.filter-group input::placeholder {
    color: var(--secondary-text-color);
}

.filter-group button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.filter-group button[type="submit"] {
    background-color: var(--accent-color);
    color: white;
}

.filter-group button[type="submit"]:hover {
    background-color: #0088cc;
    transform: translateY(-1px);
}

.filter-group button[type="button"] {
    background-color: transparent;
    color: var(--secondary-text-color);
    border: 1px solid var(--border-color);
}

.filter-group button[type="button"]:hover {
    background-color: var(--surface-color);
    color: var(--primary-text-color);
}

@media (max-width: 768px) {
    .filter-row {
        grid-template-columns: 1fr;
    }
    
    .filter-section {
        padding: 1.5rem;
    }
}