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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: #333;
    background-color: #f8f9fa;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: #333;
}

ul {
    list-style-type: none;
}

header {
    background-color: #ffffff;
    padding: 0 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    height: 80px;
    position: relative;
}

.logo a {
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
}

.logo img {
    height: 200px;
    position: absolute;
    top: -53px;
    left: 5%;
}

header nav ul {
    display: flex;
    align-items: center;
    gap: 35px;
}

header nav a {
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s ease;
}

header nav a:hover {
    color: #007bff;
}

.cta-button {
    background-color: #007bff;
    color: #ffffff !important;
    padding: 10px 20px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: #0056b3;
    color: #ffffff !important;
}

#hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 60px 5%;
    min-height: 80vh;
    gap: 40px;
}

.hero-text {
    flex: 1;
}

#hero h1 {
    font-size: 52px;
    color: #2c3e50;
    line-height: 1.2;
    margin-bottom: 20px;
}

#hero h1::before {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: #007bff;
    margin-bottom: 20px;
}

#hero p {
    font-size: 18px;
    color: #555;
    max-width: 500px;
}

.hero-image {
    flex: 1;
    text-align: center;
    position: relative;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
    min-height: 450px;
}

.hero-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    animation: imageFade 20s infinite;
}

@keyframes imageFade {
    0% { opacity: 0; }
    10% { opacity: 1; }
    25% { opacity: 1; }
    35% { opacity: 0; }
    100% { opacity: 0; }
}

.hero-image img:nth-child(1) {
    animation-delay: 0s;
}
.hero-image img:nth-child(2) {
    animation-delay: 5s;
}
.hero-image img:nth-child(3) {
    animation-delay: 10s;
}
.hero-image img:nth-child(4) {
    animation-delay: 15s;
}

#servis-sorgulama {
    padding: 60px 5%;
}

.sorgulama-icerik {
    max-width: 960px;
    margin: 0 auto;
    background-color: #2c3e50;
    color: #ffffff;
    border-radius: 15px;
    padding: 50px;
    display: flex;
    align-items: center;
    gap: 40px;
}

.sorgulama-sol {
    flex-basis: 60%;
}

.sorgulama-sag {
    flex-basis: 40%;
    text-align: center;
}

#servis-sorgulama h2 {
    font-size: 36px;
    margin-bottom: 10px;
}

#servis-sorgulama p {
    font-size: 16px;
    opacity: 0.9;
    color: #ffffff;
}

.whatsapp-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: #25D366;
    color: #ffffff;
    padding: 15px 30px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.whatsapp-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.whatsapp-btn img {
    height: 24px;
}

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

#hizmetlerimiz {
    padding: 80px 0;
    background-color: #ffffff;
}

#hizmetlerimiz h2 {
    text-align: center;
    font-size: 36px;
    color: #2c3e50;
    margin-bottom: 50px;
}

.kart-konteyneri {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.hizmet-karti {
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hizmet-karti:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

.hizmet-karti img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.kart-icerik {
    padding: 25px;
}

.hizmet-karti h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.hizmet-karti p {
    font-size: 15px;
    margin-bottom: 20px;
    flex-grow: 1;
}

.btn {
    display: inline-block;
    background-color: #007bff;
    color: #ffffff;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: bold;
    text-align: center;
    transition: background-color 0.3s ease;
}

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

#bolgeler {
    background-color: #2c3e50;
    color: #ffffff;
    padding: 80px 5%;
    text-align: center;
}

#bolgeler h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

#bolgeler p {
    font-size: 18px;
    max-width: 700px;
    margin: 0 auto 50px auto;
    opacity: 0.9;
    color: #ffffff;
}

.bolge-listesi {
    columns: 4;
    column-gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
    text-align: left;
}

.bolge-listesi li {
    margin-bottom: 12px;
    font-size: 16px;
    position: relative;
    padding-left: 25px;
}

.bolge-listesi li::before {
    content: '✓';
    color: #007bff;
    font-weight: bold;
    position: absolute;
    left: 0;
    top: 0;
}

#sss {
    padding: 80px 0;
    background-color: #ffffff;
}

.sss-icerik {
    display: flex;
    align-items: center;
    gap: 60px;
}

.sss-sol, .sss-sag {
    flex: 1;
}

#sss h2 {
    font-size: 36px;
    color: #2c3e50;
}

#sss .alt-baslik {
    font-size: 18px;
    color: #7f8c8d;
    margin-bottom: 40px;
}

.soru {
    margin-bottom: 30px;
}

.soru h3 {
    font-size: 20px;
    color: #34495e;
    margin-bottom: 8px;
}

.soru p {
    font-size: 16px;
}

#sss .btn {
    margin-top: 20px;
}

.sss-sag img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

#markalar {
    padding: 80px 0;
}

#markalar h2 {
    text-align: center;
    font-size: 36px;
    color: #2c3e50;
}

#markalar p {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 50px auto;
    font-size: 18px;
    color: #555;
}

.marka-logosu-konteyneri {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 60px;
}

.marka-logosu-konteyneri img {
    max-height: 40px;
    transition: transform 0.3s ease;
}

.marka-logosu-konteyneri img:hover {
    transform: scale(1.1);
}

footer#iletisim {
    background-color: #2c3e50;
    color: #ffffff;
    padding: 60px 0 40px 0;
    text-align: center;
}

footer#iletisim h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

footer#iletisim p {
    margin-bottom: 10px;
    opacity: 0.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

footer#iletisim strong {
    font-weight: normal;
    color: #ffc107;
}

.telif-hakki {
    background-color: #1a252f;
    color: #bdc3c7;
    text-align: center;
    padding: 20px 0;
    font-size: 14px;
    margin-top: 40px;
}

.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

.hamburger-menu .bar {
    display: block;
    width: 100%;
    height: 3px;
    background-color: #333;
    border-radius: 2px;
    transition: all 0.3s ease-in-out;
}

/* ==================================================
   MOBİL UYUMLULUK (RESPONSIVE TASARIM)
   ================================================== */
@media (max-width: 768px) {

    body {
        -webkit-text-size-adjust: 100%;
    }

    header {
        flex-direction: row;
        height: 85px;
        padding: 10px 20px;
    }
    
    .main-nav {
        display: none;
    }

    .main-nav.is-active {
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 100%;
        position: absolute;
        top: 85px;
        left: 0;
        background-color: rgba(255, 255, 255, 0.98);
        padding: 20px 0;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        z-index: 1000;
    }

    .main-nav.is-active ul {
        flex-direction: column;
        gap: 25px;
    }

    .hamburger-menu {
        display: flex;
    }

    .logo img {
        height: 130px;
        position: static;
        margin: 0;
    }

    #hero {
        display: grid;
        grid-template-columns: 1fr;
        text-align: center;
        padding: 40px 20px;
        min-height: auto;
        gap: 30px;
    }

    #hero .hero-text {
        order: 2;
    }

    #hero .hero-image {
        order: 1;
        min-height: 280px;
        width: 100%;
        margin-bottom: 0;
    }

    #hero h1 {
        font-size: 32px;
        line-height: 1.3;
    }
    
    #hero h1::before {
        margin: 0 auto 15px auto;
    }

    #hero p {
        font-size: 16px;
    }

    .sorgulama-icerik, .sss-icerik {
        flex-direction: column;
        padding: 30px 20px;
        text-align: center;
    }

    .sorgulama-sol, .sorgulama-sag {
        flex-basis: 100%;
    }
    
    .sss-sol, .sss-sag {
        flex: 1;
        width: 100%;
    }

    #servis-sorgulama h2, #sss h2, #hizmetlerimiz h2, #bolgeler h2, #markalar h2 {
        font-size: 28px;
    }

    .kart-konteyneri {
        grid-template-columns: 1fr;
    }

    .bolge-listesi {
        columns: 2;
        gap: 20px;
    }
}