@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Kurumsal Renk Paleti */
    --primary-color: #0B2D45;      /* Güven Veren Koyu Lacivert */
    --secondary-color: #555555;    /* Profesyonel Gri */
    --bg-color: #ffffff;
    --bg-light: #f4f4f4;           /* Hafif, temiz zemin */
    --border-color: #e0e0e0;       /* Daha belirgin sınır çizgileri */
    --accent-color: #A68966;       /* Mimari Bronz/Altın Detay */
    
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-main);
    color: var(--primary-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    font-size: 16px; /* Okunabilirliği artıran standart boyut */
    font-weight: 400;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-center { text-align: center; }
.bg-light { background-color: var(--bg-light); }
.section { padding: 80px 0; }
.section-header { margin-bottom: 60px; text-align: center; }
.section-header h2 { font-size: 2.2rem; font-weight: 700; color: var(--primary-color); margin-bottom: 16px; }
.section-header p { font-size: 1.1rem; color: var(--secondary-color); max-width: 700px; margin: 0 auto; }

/* --- Header & Navigasyon --- */
.site-header {
    background-color: #ffffff;
    border-bottom: 4px solid var(--primary-color); /* Sağlam, kurumsal bir çizgi */
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo a {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: -1px;
}

.main-nav ul {
    display: flex;
    gap: 30px;
}

.main-nav a {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
}

.main-nav a:hover {
    color: var(--accent-color); /* Hover durumunda bronz dokunuş */
}

/* --- Hero Section --- */
.hero-section {
    padding: 120px 0;
    text-align: center;
    background-color: var(--primary-color); /* Lacivert zemin */
    color: #ffffff;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero-content p {
    font-size: 1.2rem;
    color: #d1d1d1;
    max-width: 700px;
    margin: 0 auto 30px;
}

/* --- Butonlar (Daha köşeli, daha ciddi) --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 30px;
    border-radius: 2px; /* Köşeli yapı */
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    text-transform: uppercase;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--accent-color);
}

.btn-outline {
    background-color: transparent;
    color: #fff;
    border-color: #fff;
}

.btn-outline:hover {
    background-color: #fff;
    color: var(--primary-color);
}

/* --- Grid & Kartlar --- */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.card {
    background: #fff;
    padding: 40px;
    border: 1px solid var(--border-color);
    border-bottom: 4px solid var(--primary-color); /* Sağlam temel vurgusu */
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    border-bottom-color: var(--accent-color);
}

.card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.card p {
    color: var(--secondary-color);
    font-size: 0.95rem;
}

/* --- Footer --- */
.site-footer {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 60px 0 20px;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 20px;
    text-transform: uppercase;
    color: var(--accent-color);
}

.footer-col a, .footer-col p {
    font-size: 0.9rem;
    color: #cccccc;
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 0.8rem;
    color: #888;
}

/* --- Mobil Uyumluluk --- */
@media (max-width: 768px) {
    .grid-3 { grid-template-columns: 1fr; }
    .footer-container { grid-template-columns: 1fr; gap: 40px; }
    .hero-content h1 { font-size: 2rem; }
}