/* Genel Stil Sıfırlamaları ve Font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;600;700&display=swap');

:root {
    --primary-color: #007bff;
    /* Mavi */
    --secondary-color: #6c757d;
    /* Gri */
    --accent-color: #28a745;
    /* Yeşil (Teklif Al butonu için) */
    --dark-color: #343a40;
    --light-color: #f8f9fa;
    --white-color: #ffffff;
    --spacing: 1.5rem;
}

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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--white-color);
}

img,
video,
iframe {
    max-width: 100%;
    height: auto;
}

/* Kapsayıcı (Container) */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing);
}

/* Yatay Çizgi */
hr {
    border: 0;
    height: 1px;
    background-image: linear-gradient(to right, rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0));
    margin: calc(var(--spacing) * 2) 0;
}

/* Bölüm Başlıkları */
.section-title {
    text-align: center;
    margin-bottom: calc(var(--spacing) * 2);
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--dark-color);
    font-weight: 700;
}

.section-title p {
    color: var(--secondary-color);
    font-style: italic;
}

.section-padding {
    padding: calc(var(--spacing) * 3) 0;
}

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

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

.mt-4 {
    margin-top: calc(var(--spacing) * 2);
}

/* --- Buton Stilleri --- */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

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

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #5a6268;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

.btn-small {
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    background-color: var(--light-color);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    text-decoration: none;
    border-radius: 3px;
    margin-top: 0.75rem;
}

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

/* --- Header ve Navigasyon --- */
header {
    background-color: var(--white-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
}

.logo i {
    margin-right: 0.5rem;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links li a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 600;
    padding: 0.25rem 0;
    transition: color 0.3s ease;
}

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

.nav-links .btn-nav {
    background-color: var(--accent-color);
    color: var(--white-color);
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-links .btn-nav:hover {
    background-color: #1e7e34;
    color: var(--white-color);
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--dark-color);
}

/* --- Hero Bölümü --- */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://picsum.photos/1920/1080?random=1') no-repeat center center/cover;
    color: var(--white-color);
    min-height: 70vh;
    display: flex;
    align-items: center;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 0;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.hero-content h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.hero-btns a {
    margin: 0 0.5rem;
    font-size: 1.1rem;
}

/* --- Önizleme Gridleri (Hizmetler, Teknolojiler, Ürünler) --- */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: calc(var(--spacing) * 2);
}

.preview-item {
    background-color: var(--white-color);
    padding: var(--spacing);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.preview-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.preview-item i {
    margin-bottom: var(--spacing);
}

.icon-color {
    color: var(--primary-color);
}

.preview-item h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.preview-item p {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    flex-grow: 1;
    /* P'nin esnek büyümesi, butonları hizalar */
}

/* --- Footer --- */
footer {
    background-color: var(--dark-color);
    color: var(--light-color);
    padding: calc(var(--spacing) * 3) 0 calc(var(--spacing) * 1) 0;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: var(--spacing);
    padding-bottom: var(--spacing);
}

.footer-column {
    flex: 1 1 250px;
    margin-bottom: var(--spacing);
}

.footer-column h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing);
    color: var(--primary-color);
    font-weight: 600;
}

.footer-column p {
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.footer-links li a {
    color: var(--light-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links li a:hover {
    color: var(--primary-color);
}

.footer-links li i {
    margin-right: 0.5rem;
    color: var(--primary-color);
    width: 15px;
    /* İkonların hizalanması için */
}

.social-links {
    margin-top: var(--spacing);
}

.social-links a {
    color: var(--light-color);
    font-size: 1.25rem;
    margin-right: 1rem;
    transition: color 0.3s ease;
}

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

.copyright {
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing);
    margin-top: var(--spacing);
}

/* --- Mobil Duyarlılık (Media Queries) --- */

/* Giriş elemanları için genel stil (Taşmaları önlemek için) */
input,
select,
textarea {
    max-width: 100%;
    box-sizing: border-box;
}

@media (max-width: 992px) {

    /* Tablet ve küçük masaüstü */
    .hero {
        min-height: 60vh;
    }

    .hero-content h1 {
        font-size: 3rem;
    }

    .nav-links {
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {

    /* Mobil görünüm */
    .hero {
        min-height: 50vh;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content h2 {
        font-size: 1.4rem;
    }

    /* Hamburger Menü Açık/Kapalı */
    .nav-links {
        position: fixed;
        top: 80px;
        /* Header yüksekliği */
        width: 70%;
        /* Side menu width */
        max-width: 300px;
        right: 0;
        /* Align to right */
        left: auto;
        /* Reset left */
        background-color: var(--white-color);
        height: calc(100vh - 80px);
        /* Header yüksekliğini çıkar */
        flex-direction: column;
        align-items: center;
        gap: 0;
        transform: translateX(100%);
        transition: transform 0.3s ease-in-out;
        padding: var(--spacing);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.2);
        /* Stronger shadow on left */
        overflow-y: auto;
        /* Dikeyde sığmazsa kaydırma çubuğu */
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-links li {
        width: 100%;
        text-align: center;
        padding: 1rem 0;
        border-bottom: 1px solid var(--light-color);
    }

    .nav-links li a {
        display: block;
        font-size: 1.2rem;
        padding: 0.75rem 0;
    }

    .hamburger {
        display: block;
    }

    /* Footer Düzeni */
    .footer-content {
        flex-direction: column;
    }

    .footer-column {
        flex: 1 1 100%;
        margin-bottom: var(--spacing) * 2;
    }
}

@media (max-width: 480px) {

    /* Çok küçük ekranlar için ekstra düzenlemeler */
    :root {
        --spacing: 1rem;
    }

    .container {
        padding: 0 1rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content h2 {
        font-size: 1.2rem;
    }

    .section-title h2 {
        font-size: 2rem;
    }

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

    .hero-btns {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .hero-btns a {
        margin: 0;
        display: block;
    }
}

/* --- JS ile Tetiklenecek Sınıflar (Hamburger Menü için) --- */
/*
Bu CSS, hamburger menü etkileşimini sağlamak için JavaScript'te (script.js) kullanılacaktır.
*/