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

/* Değişkenler ve Genel Ayarlar */
:root {
    --primary-color: #005A9E; /* Profesyonel Mavi */
    --secondary-color: #4CAF50; /* Canlı Yeşil */
    --accent-color: #FFC107; /* Vurgu Rengi - Altın Sarısı */
    --dark-color: #212529;
    --text-color: #495057;
    --light-color: #F8F9FA;
    --white-color: #FFFFFF;
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Open Sans', sans-serif;
    --border-radius: 8px;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--white-color);
}

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

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--dark-color);
    line-height: 1.3;
}

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

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

/* Header & Navigasyon */
.header {
    background: var(--white-color);
    box-shadow: var(--shadow);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.main-nav ul {
    list-style: none;
    display: flex;
    align-items: center;
}

.main-nav ul li {
    margin-left: 25px;
}

.main-nav ul li a {
    font-weight: 600;
    padding: 5px 0;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.main-nav ul li a:hover,
.main-nav ul li a.active {
    color: var(--secondary-color);
    border-bottom-color: var(--secondary-color);
}

/* Hero (Ana Başlık) Bölümü */
.hero {
    background: linear-gradient(rgba(0, 90, 158, 0.7), rgba(0, 90, 158, 0.7)), url('https://placehold.co/1920x1080/333/fff?text=Moderne+Architectuur') no-repeat center center/cover;
    height: 80vh;
    display: flex;
    align-items: center;
    text-align: center;
    color: var(--white-color);
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--white-color);
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 2rem auto;
}

/* Butonlar */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-family: var(--font-heading);
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: #45a049;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--light-color);
    transform: translateY(-2px);
}

/* Genel Bölüm Stilleri */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--secondary-color);
    margin: 15px auto 0;
    border-radius: 2px;
}

.bg-light {
    background-color: var(--light-color);
}

/* Izgara Yapıları */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

/* Kart Stilleri */
.card {
    background: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.card-content {
    padding: 25px;
}

.card-content h3 {
    margin-bottom: 10px;
}

.card-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.card img {
    height: 220px;
    width: 100%;
    object-fit: cover;
}

/* Projeler Bölümü */
.project-filter {
    text-align: center;
    margin-bottom: 40px;
}

.filter-btn {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 20px;
    margin: 0 5px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary-color);
    color: var(--white-color);
}

.project-item {
    position: relative;
}

.project-item .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 90, 158, 0.8);
    color: var(--white-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.project-item:hover .overlay {
    opacity: 1;
}

/* CTA Bölümü */
.cta-section {
    background: var(--primary-color);
    color: var(--white-color);
    text-align: center;
}

.cta-section h2 {
    color: var(--white-color);
    font-size: 2.5rem;
    margin-bottom: 20px;
}

/* İletişim Sayfası */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 50px;
    align-items: flex-start;
}

.contact-info-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-info-item i {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-right: 15px;
    width: 40px;
    height: 40px;
    background: var(--light-color);
    border-radius: 50%;
    display: grid;
    place-items: center;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    font-family: var(--font-body);
}

.map-container {
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-top: 20px;
    height: 250px;
}
.map-container iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    color: var(--white-color);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-col p, .footer-col ul li a {
    color: #ccc;
    transition: color 0.3s ease;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.social-icons a {
    color: var(--white-color);
    font-size: 1.5rem;
    margin-right: 15px;
    transition: color 0.3s ease;
}

.social-icons a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
}