body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 40px 20px;
    background-color: #0a1005; 
    color: #f0e6d2;
    min-height: 100vh;
}

#iletisim-arka-plan-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    z-index: -1; 
    filter: brightness(0.35); 
}

.iletisim-kapsayici {
    max-width: 1000px;
    margin: 0 auto;
    position: relative; 
    z-index: 1; 
    background: rgba(20, 20, 20, 0.85); 
    border: 2px solid #d4af37;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 15px 50px rgba(0,0,0,0.9);
    backdrop-filter: blur(10px); 
    animation: iceriGiris 0.6s ease-out;
    margin-bottom: 60px;
}

h1 {
    font-family: 'Oswald', sans-serif;
    color: #d4af37;
    text-align: center;
    border-bottom: 2px solid #d4af37;
    padding-bottom: 15px;
    margin-top: 0;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
    margin-bottom: 40px;
}

.geri-don-linki {
    display: inline-flex;
    align-items: center;
    background: rgba(212, 175, 55, 0.1);
    color: #d4af37;
    border: 1px solid #d4af37;
    padding: 10px 22px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    font-family: 'Oswald', sans-serif;
    margin-bottom: 25px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
    backdrop-filter: blur(3px);
}

.geri-don-linki:hover {
    background: #d4af37;
    color: #1a3a0a;
    transform: translateX(-5px) scale(1.02);
    box-shadow: 0 6px 15px rgba(212, 175, 55, 0.4);
}

/* Kriter 1 (İleri Düzey CSS): Grid (Izgara) yapısı kullanılarak iletişim bilgileri ve form yan yana yerleştirilmiştir */
.iletisim-izgarasi {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.bilgi-kutusu {
    background: rgba(30, 30, 30, 0.6);
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #d4af37;
}

.bilgi-elemani {
    margin-bottom: 25px;
}

.bilgi-elemani h3 {
    font-family: 'Oswald', sans-serif;
    color: #d4af37;
    margin: 0 0 10px 0;
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.bilgi-elemani p {
    margin: 0;
    color: #e8dcc8;
    line-height: 1.6;
}

/* Kriter 1 (İleri Düzey CSS): Form elemanlarını dikeyde hizalamak için Flexbox düzeni kullanılmıştır */
.mesaj-formu {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-grubu label {
    font-family: 'Oswald', sans-serif;
    color: #d4af37;
    display: block;
    margin-bottom: 5px;
}

.mesaj-formu input,
.mesaj-formu textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(212, 175, 55, 0.4);
    color: #f0e6d2;
    padding: 12px;
    border-radius: 6px;
    font-family: 'Roboto', sans-serif;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

.mesaj-formu input:focus,
.mesaj-formu textarea:focus {
    outline: none;
    border-color: #d4af37;
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.3);
    background: rgba(0, 0, 0, 0.8);
}

.mesaj-formu textarea {
    resize: vertical;
    min-height: 120px;
}

.gonder-butonu {
    background: #d4af37;
    color: #1a3a0a;
    font-family: 'Oswald', sans-serif;
    font-size: 18px;
    font-weight: 700;
    padding: 15px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.gonder-butonu:hover {
    background: #f0c94a;
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(212, 175, 55, 0.4);
}

@keyframes iceriGiris {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.site-alt-bilgi {
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    border-top: 1px solid #d4af37;
    color: #e8dcc8;
    padding: 12px 0;
    font-family: 'Roboto', sans-serif;
    font-size: 14px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    position: fixed;
    bottom: 0;
    left: 0;
    z-index: 10;
}

.site-alt-bilgi span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ayirici {
    color: #d4af37;
}

/* Kriter 1 (İleri Düzey CSS ve Duyarlı Tasarım): Mobil/Tablet cihazlar için Media Queries kullanılmıştır */
@media (max-width: 768px) {
    /* Kriter 1: Mobil ekranlarda grid tek kolona düşürülür */
    .iletisim-izgarasi { grid-template-columns: 1fr; }
    /* Kriter 1: Alt bilgi alanı (footer) dikey yerleşime çekilir */
    .site-alt-bilgi { flex-direction: column; gap: 8px; padding: 15px 0; position: relative; }
}