/* --- Değişkenler ve Temel Ayarlar --- */
:root {
    --bg-color: #121212;
    --surface-color-dark: #1E1E1E;
    --surface-color-light: #FFFFFF;
    --gray-accent: #C0C0C0;
    
    --text-color: #E0E0E0;
    --text-dark: #1F2937;
    --text-muted: #6B7280;
    
    --heading-color: #FFFFFF;
    
    --primary-color: #FFD700;
    --primary-color-hover: #e6c200;
    
    --font-family: 'Inter', sans-serif;
    --border-color: #333;
    --light-border-color: #E2E8F0;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

/* --- Genel Resetleme ve Body Stilleri --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
    overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary-color); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--primary-color-hover); }
img { max-width: 100%; height: auto; display: block; }
section { padding: 6rem 0; }

/* --- HEADER / NAVBAR --- */
.navbar {
    background-color: rgba(18, 18, 18, 0.85);
    backdrop-filter: blur(10px);
    padding: 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky; top: 0; z-index: 1000;
    display: flex;
    align-items: center;
    height: 85px;
}
.navbar .container { 
    display: flex; 
    justify-content: space-between;
    align-items: center; 
    width: 100%;
}
.navbar .logo img { 
    height: 40px;
    display: block;
}
.navbar nav {
    margin-left: auto;
    margin-right: 30px; /* DÜZELTİLDİ: Menü ile sağdaki grup arasına boşluk eklendi */
}
.navbar nav ul { 
    list-style: none; 
    display: flex; 
    gap: 40px; 
}
.navbar nav a { color: var(--text-color); font-weight: 500; }
.navbar nav a.active, .navbar nav a:hover { color: var(--primary-color); }
.header-right {
    display: flex;
    align-items: center;
    gap: 25px;
}
.cta-button {
    background: var(--primary-color);
    color: #000;
    padding: 10px 20px; border-radius: 5px; font-weight: bold;
    border: none;
    transition: background-color 0.3s ease;
}
.cta-button:hover { background: var(--primary-color-hover); }

/* Animasyonlu Dil Değiştirme Anahtarı */
.language-toggle {
    background-color: var(--surface-color-dark);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    width: 70px;
    height: 34px;
    display: flex;
    align-items: center;
    padding: 4px;
    position: relative;
    cursor: pointer;
    user-select: none;
}
.toggle-ball {
    background-color: var(--primary-color);
    width: 26px;
    height: 26px;
    border-radius: 50%;
    position: absolute;
    transition: transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
}
.lang-text {
    font-size: 0.8rem;
    font-weight: bold;
    width: 50%;
    text-align: center;
    z-index: 1;
    pointer-events: none;
    transition: color 0.3s ease;
}
.lang-text.lang-en { color: #000; }
.lang-text.lang-tr { color: var(--text-color); }
.language-toggle.tr-active .toggle-ball {
    transform: translateX(36px);
}
.language-toggle.tr-active .lang-en {
    color: var(--text-color);
}
.language-toggle.tr-active .lang-tr {
    color: #000;
}

/* --- HERO SECTION --- */
#hero {
    min-height: 90vh; display: flex; align-items: center; justify-content: center;
    text-align: center;
    background: linear-gradient(rgba(18, 18, 18, 0.6), rgba(18, 18, 18, 0.9)), url('../assets/images/hero-background.jpg') no-repeat center center/cover;
}
#hero h1 { font-size: clamp(2.8rem, 5vw, 4.5rem); color: var(--heading-color); line-height: 1.2; max-width: 800px; margin: 0 auto 1rem auto; text-shadow: 0 2px 4px rgba(0,0,0,0.4); }
#hero p { font-size: 1.25rem; max-width: 650px; margin: 0 auto 2.5rem auto; color: #b0b0b0; }
.cta-button-main {
    background-color: var(--primary-color); color: #000;
    padding: 15px 35px; border-radius: 5px; font-size: 1.1rem;
    font-weight: bold; display: inline-block;
    transition: transform 0.3s ease, background-color 0.3s ease;
}
.cta-button-main:hover { background: var(--primary-color-hover); transform: translateY(-5px); }

/* --- GENEL BÖLÜM STİLLERİ --- */
.section-title { text-align: center; margin-bottom: 4rem; }
.section-title h2 { font-size: clamp(2.2rem, 4vw, 3rem); color: var(--heading-color); margin-bottom: 1rem; position: relative; display: inline-block; }
.section-title h2::after {
    content: ''; position: absolute; bottom: -10px; left: 50%;
    transform: translateX(-50%); width: 80px; height: 4px;
    background: var(--primary-color); border-radius: 2px;
}
.section-title p { font-size: 1.1rem; max-width: 700px; margin: 1.5rem auto 0 auto; color: var(--text-muted, #b0b0b0); }
.section-title.left-aligned { text-align: left; margin-bottom: 2rem; }
.section-title.left-aligned h2::after { left: 0; transform: translateX(0); }

/* --- GRIDLER --- */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.5rem; }

/* --- ABOUT US --- */
#about { background-color: var(--bg-color); }
.about-container { display: flex; align-items: center; gap: 4rem; flex-wrap: wrap; }
.about-image, .about-content { flex: 1 1 400px; }
.about-image img { border-radius: 8px; }
.about-content { color: var(--text-color); }

/* --- WHAT WE PROMISE --- */
#what-we-promise { background-color: var(--gray-accent); }
#what-we-promise .section-title h2, #what-we-promise .section-title p { color: var(--text-dark); }
.promises-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}
.promise-item {
    display: flex; align-items: center; gap: 1rem;
    background-color: var(--surface-color-light);
    padding: 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--light-border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.promise-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.promise-item .icon { font-size: 1.5rem; color: var(--primary-color); }
.promise-item h3 { font-size: 1rem; font-weight: 500; color: var(--text-dark); }

/* --- SERVICES & DETAY SAYFALARI --- */
#services { background-color: var(--surface-color-dark); }
.service-card {
    background-color: var(--bg-color); padding: 2.5rem 2rem;
    border-radius: 8px; text-align: center; border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex; flex-direction: column;
    height: 100%;
}
.service-card:hover { transform: translateY(-10px); box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2); }
a.service-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}
.service-card .icon { font-size: 3rem; color: var(--primary-color); margin-bottom: 1.5rem; }
.service-card h3 { font-size: 1.5rem; margin-bottom: 1rem; color: var(--heading-color); }
.service-card p { font-size: 1rem; color: var(--text-color); flex-grow: 1; }

.detail-container {
    display: flex;
    align-items: center;
    gap: 4rem;
    flex-wrap: wrap;
}
.detail-image, .detail-content {
    flex: 1 1 400px;
}
.detail-image img {
    border-radius: 8px;
}
.detail-content p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-top: -1.5rem;
    margin-bottom: 2rem;
}
.detail-list {
    list-style: none;
    padding: 0;
}
.detail-list li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--text-color);
}
.detail-list li i {
    color: var(--primary-color);
    margin-top: 5px;
}

#warehouse-details { background-color: var(--bg-color); }
#ecommerce-fulfillment-details { background-color: var(--surface-color-dark); }
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.detail-card {
    background-color: var(--bg-color);
    padding: 2.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.detail-card h3 {
    font-size: 1.75rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}
.detail-card p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 2rem;
}
.fulfillment-section {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 3rem;
    margin-top: 3rem;
    text-align: center;
}
.fulfillment-section .icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}
.fulfillment-section h3 {
    font-size: 2rem;
    color: var(--heading-color);
    margin-bottom: 1rem;
}
.fulfillment-section p {
    font-size: 1.1rem;
    color: var(--text-color);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}
#logistics-details { background-color: var(--bg-color); }
.logistics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.logistics-card {
    background-color: var(--surface-color-dark);
    padding: 2.5rem;
    border-radius: 8px;
    border-left: 5px solid var(--primary-color);
    transition: background-color 0.3s ease;
}
.logistics-card:hover {
    background-color: #2a2a2a;
}
.logistics-card .icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}
.logistics-card h3 {
    font-size: 1.75rem;
    color: var(--heading-color);
    margin-bottom: 1rem;
}
.logistics-card p {
    font-size: 1rem;
    color: var(--text-color);
    line-height: 1.8;
}
.advantages-section {
    margin-top: 6rem;
    background-color: var(--surface-color-dark);
    padding: 3rem;
    border-radius: 8px;
}
.advantages-section h3 {
    font-size: 2rem;
    color: var(--heading-color);
    margin-bottom: 2rem;
}

/* --- VALUE PROPOSITIONS --- */
#value-propositions { background-color: var(--bg-color); }
.propositions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.proposition-card {
    background-color: var(--surface-color-dark);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}
.proposition-card:hover { transform: translateY(-5px); border-color: var(--primary-color); }
.proposition-card .icon { font-size: 2.5rem; color: var(--primary-color); margin-bottom: 1.5rem; }
.proposition-card h3 { font-size: 1.5rem; color: var(--heading-color); margin-bottom: 1rem; }
.proposition-card p { font-size: 1rem; color: var(--text-color); line-height: 1.6; }

/* --- TECHNOLOGY --- */
#technology { background-color: var(--bg-color); }
.tech-list {
    list-style: none; padding: 0; margin-top: 3rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}
.tech-list li {
    background-color: var(--surface-color-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px; padding: 2rem;
    display: flex; align-items: flex-start; gap: 1.5rem;
}
.tech-list .icon { font-size: 2rem; color: var(--primary-color); margin-top: 5px; }
.tech-list-content h3 { font-size: 1.25rem; color: var(--heading-color); line-height: 1.6; }

/* --- 24/7 SUPPORT --- */
#support { background-color: var(--surface-color-dark); }
.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.support-card {
    background-color: var(--bg-color);
    padding: 2.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}
.support-card .icon { font-size: 2.5rem; color: var(--primary-color); margin-bottom: 1.5rem; }
.support-card h3 { font-size: 1.75rem; color: var(--heading-color); margin-bottom: 1rem; }
.support-card p { font-size: 1.1rem; color: var(--text-color); line-height: 1.8; }

/* --- SECURITY --- */
#security { background-color: var(--bg-color); }
.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.security-item {
    background-color: var(--surface-color-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}
.security-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}
.security-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}
.security-item h3 {
    font-size: 1.25rem;
    color: var(--heading-color);
}

/* --- INTEGRATIONS SECTION --- */
#integrations { 
    background-color: var(--gray-accent);
}
#integrations .section-title h2, #integrations .section-title p { color: var(--text-dark); }
.integration-wrapper { margin-top: 2rem; }
.integration-title {
    font-size: 1.5rem; color: var(--text-dark);
    margin-top: 3rem; margin-bottom: 2rem;
    padding-bottom: 1rem; border-bottom: 2px solid #A0A0A0;
    text-align: left;
}
.logo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
    align-items: center;
}
.logo-item {
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--surface-color-light);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}
.logo-item:hover {
    transform: translateY(-5px);
}
.logo-item img {
    width: 100%;
    height: 100%;
    max-width: 140px;
    object-fit: contain;
    filter: none;
    opacity: 1;
    transition: transform 0.4s ease;
}
.logo-item:hover img {
    transform: scale(1.1);
}

/* --- CONTACT SECTION --- */
#contact { background-color: var(--bg-color); }
#contact .section-title h2, #contact .section-title p { color: var(--heading-color); }
.contact-form { max-width: 700px; margin: 0 auto; background-color: var(--surface-color-dark); padding: 2.5rem; border-radius: 8px; }
.contact-form input, .contact-form textarea {
    width: 100%; padding: 1rem; border-radius: 5px; border: 1px solid var(--border-color);
    background-color: var(--bg-color); color: var(--text-color); font-size: 1rem; font-family: var(--font-family);
    margin-bottom: 1.5rem;
}
.contact-form button { width: 100%; }

/* --- FOOTER --- */
footer { text-align: center; padding: 2rem 0; background-color: #000; color: #777; }

/* ==========================================================================
   MOBİL UYUMLULUK (RESPONSIVE) STİLLERİ
   ========================================================================== */
.hamburger-menu { display: none; }

@media (max-width: 992px) {
    .header-right {
        gap: 15px;
    }
    .container { max-width: 90%; }
    .grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
    .about-container { flex-direction: column; text-align: center; }
    .section-title.left-aligned { text-align: center; }
    .section-title.left-aligned h2::after { left: 50%; transform: translateX(-50%); }
    .security-container { flex-direction: column-reverse; }
}

@media (max-width: 768px) {
    .header-right {
        display: none;
    }
    .navbar nav {
        display: none; position: absolute;
        top: 85px; left: 0; width: 100%;
        background-color: #1A1A1A;
        flex-direction: column; text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    .navbar nav.active { display: flex; }
    .navbar nav ul { flex-direction: column; width: 100%; padding: 0; }
    .navbar nav li { padding: 1rem 0; width: 100%; border-top: 1px solid var(--border-color); }
    .navbar nav li:first-child { border-top: none; }
    .hamburger-menu { display: block; font-size: 1.5rem; cursor: pointer; color: var(--heading-color); padding: 0 10px; }
    
    #hero h1 { font-size: 2.5rem; }
    #hero p { font-size: 1.1rem; }

    .grid-3, .grid-4, .promises-list-grid, .tech-list, .propositions-grid, .support-grid, .security-grid, .detail-grid, .logistics-grid { grid-template-columns: 1fr; }
    .integration-title { text-align: center; }
    
    .tech-card h3, .security-content h3, .support-card h3, .proposition-card h3, .detail-card h3, .logistics-card h3, .advantages-section h3 { font-size: 1.5rem; }
}