/* Temel Renkler */
:root {
    /* Aydınlık Tema Renkleri */
    --primary-color: #212529; /* Mat Siyah / Koyu Gri */
    --accent-color: #feec02; /* Canlı Sarı (CTA ve Vurgu) */
    --text-color: #212529;
    --light-bg: #f8f9fa; /* Açık Gri Arka Plan */
    --white: #ffffff;

    /* Karanlık Tema Renkleri */
    --dark-bg: #1a1a1a; /* Koyu Arka Plan */
    --dark-text: #f8f9fa; /* Açık Metin Rengi */
    --dark-card-bg: #2d2d2d; /* Koyu Kart Arka Planı */
}

/* Genel Sıfırlama ve Font */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    background-color: var(--light-bg);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s; /* Tema geçişi için animasyon */
}

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

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* HEADER - Sabit Üst Çubuk */
.main-header {
    background-color: var(--primary-color);
    border-bottom: 3px solid var(--accent-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 80px; 
}

.logo-area img {
    max-height: 40px; 
    width: auto;
}

.main-nav ul {
    list-style: none;
    display: flex;
}
.main-nav li {
    margin-left: 30px;
}
.main-nav a {
    color: var(--white);
    font-weight: 500;
    padding: 10px 0;
    transition: color 0.3s;
}
.main-nav a:hover, .main-nav li.active a {
    color: var(--accent-color);
}

/* Hızlı İletişim Butonları Alanı */
.quick-contact-area {
    display: flex;
    align-items: center;
    gap: 15px; 
}

/* Tema Değiştirme Butonu */
.theme-toggle-button {
    background: none;
    border: none;
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    padding: 0;
    transition: color 0.3s;
}

.theme-toggle-button:hover {
    color: var(--accent-color);
}

/* Telefon Numarası Vurgusu */
.phone-display {
    color: var(--accent-color);
    font-weight: 700;
    font-size: 18px;
    padding-right: 15px;
    border-right: 1px solid #444; 
}

/* Sosyal Medya İkonları */
.social-icons a {
    color: var(--white);
    font-size: 20px;
    margin-left: 10px;
    transition: color 0.3s;
}
.social-icons a:hover {
    color: var(--accent-color);
}

/* CTA Butonu Stilimiz */
.cta-button {
    background-color: var(--accent-color);
    color: var(--primary-color) !important;
    padding: 10px 18px;
    border-radius: 5px;
    transition: background-color 0.3s;
    font-weight: 700;
}
.cta-button:hover {
    background-color: #ffda6a;
}


/* HERO SECTION ve Form Stilleri */
.hero-section {
    height: 450px;
    /* Yer tutucu görsel kullanıldı */
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('hero-bg-placeholder.jpg') no-repeat center center/cover;
    color: var(--white);
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    margin-bottom: 40px;
}
.hero-content h2 {
    font-size: 42px;
    margin-bottom: 10px;

}
.appointment-form {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    max-width: 700px;
    margin: 0 auto;
    padding: 15px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: 8px;
}
.appointment-form input, .appointment-form textarea {
    padding: 10px;
    border: none;
    border-radius: 4px;
    flex-grow: 1;
    width: 48%;
}
.appointment-form button {
    background-color: var(--accent-color);
    color: var(--primary-color);
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 700;
    width: 100%;
    transition: background-color 0.3s;
}

/* GRID DÜZENLERİ ve Kart Stilleri */
section h2 {
    text-align: center;
    font-size: 30px;
    color: var(--primary-color) !important; /* Başlıklar normalde siyah */
    margin-bottom: 30px;
}
.service-grid, .campaign-grid, .feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    text-align: left;
}
.service-card {
    background-color: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 5px solid var(--primary-color);
    display: block;
    color: var(--text-color);
}
.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    border-top-color: var(--accent-color);
}
.campaign-item, .feature-item {
    background-color: var(--white);
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border-left: 4px solid var(--accent-color);
}
.expertise-logos {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}
.expertise-logos img {
    max-height: 80px;
    opacity: 0.7;
    transition: opacity 0.3s;
}

/* HAKKIMIZDA SAYFASI ÖZEL STİLLERİ */
.about-hero {
    text-align: center;
    padding: 60px 20px;
    background-color: var(--white);
    border-bottom: 1px solid #ddd;
}

.mission-vision {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding-top: 50px;
    padding-bottom: 50px;
}
.mission-item {
    padding: 20px;
    border-left: 5px solid var(--accent-color);
    background-color: var(--light-bg);
}

/* İLETİŞİM SAYFASI ÖZEL STİLLERİ */
.contact-map-info {
    padding: 60px 20px;
    background-color: var(--white);
}
.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    align-items: start;
}
.map-container iframe {
    width: 100%;
    min-height: 400px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.info-item {
    padding: 15px;
    border-left: 3px solid var(--accent-color);
    background-color: var(--light-bg);
    border-radius: 4px;
}
.contact-form-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
    background-color: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}
.contact-form-layout input, 
.contact-form-layout select {
    padding: 12px;
    border: 1px solid #ced4da;
    border-radius: 4px;
}
.contact-form-layout textarea {
    grid-column: 1 / 3;
    padding: 12px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    resize: vertical;
}
.cta-form-button {
    grid-column: 1 / 3;
    background-color: var(--accent-color);
    color: var(--primary-color);
    border: none;
    padding: 15px;
    border-radius: 4px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s;
}

/* FOOTER - YAYILMIŞ SÜTUNLAR, ORTALANMIŞ COPYRIGHT */
.main-footer {
    background-color: var(--primary-color);
    color: var(--light-bg);
    padding: 50px 0 20px 0;
}

.footer-columns {
    display: flex;
    justify-content: space-between; 
    text-align: left; 
    gap: 30px; 
    border-bottom: 1px solid #495057;
    padding-bottom: 30px;
    max-width: 1200px; 
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

.footer-columns ul {
    list-style: none;
    padding: 0;
}

.footer-columns h3 {
    color: var(--accent-color);
    margin-bottom: 15px;
}
.footer-columns a {
    color: var(--light-bg);
    transition: color 0.3s;
}

.copyright {
    text-align: center; /* SADECE BU SATIRI ORTALAR */
    padding-top: 20px;
    font-size: 0.9em;
}

/* WHATSAPP HIZLI İLETİŞİM BUTONU STİLİ */
.whatsapp-button {
    position: fixed; 
    bottom: 20px;
    right: 20px;
    z-index: 1000; 
    
    background-color: #25D366; 
    color: var(--white);
    
    width: 55px;
    height: 55px;
    border-radius: 50%; 
    
    display: flex;
    justify-content: center;
    align-items: center;
    
    font-size: 28px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, background-color 0.3s;
}

.whatsapp-button:hover {
    background-color: #128C7E;
    transform: scale(1.1); 
}


/* KARANLIK MOD GENEL TANIMLAMALAR */
body.dark-mode {
    background-color: var(--dark-bg);
    color: var(--dark-text); /* Temel metin rengi (f8f9fa) */
}

body.dark-mode a {
    color: var(--dark-text);
}

/* Karanlık modda başlıkları ve vurgulu metinleri açık renge dönüştür */
body.dark-mode h1, 
body.dark-mode h2, 
body.dark-mode h3, 
body.dark-mode .phone-display {
    color: var(--dark-text) !important; 
}
body.dark-mode .quick-contact-area a {
     color: var(--dark-text);
}

/* Kart/İçerik Arka Planları */
body.dark-mode .section-container,
body.dark-mode .service-card,
body.dark-mode .campaign-item,
body.dark-mode .feature-item,
body.dark-mode .info-item,
body.dark-mode .contact-form-layout {
    background-color: var(--dark-card-bg); 
    color: var(--dark-text);
}

body.dark-mode .service-card:hover {
    border-top-color: var(--accent-color);
}

body.dark-mode .about-hero {
    background-color: var(--dark-card-bg);
    border-bottom-color: #333;
}

/* Sadece aksan sarı renkte kalacak başlıklar */
body.dark-mode .about-hero h1 {
    color: var(--accent-color) !important; 
}
body.dark-mode .about-hero .subtitle {
    color: #bbb;
}
body.dark-mode .mission-item {
    background-color: var(--dark-card-bg);
}


/* Mobil Uyumluluk */
@media (max-width: 900px) {
    .main-header {
        flex-direction: column;
        align-items: flex-start;
        height: auto;
        padding-bottom: 10px;
    }
    
    .main-nav {
        width: 100%;
        order: 3;
    }
    .main-nav ul {
        display: none;
        flex-direction: column;
        width: 100%;
    }
    .main-nav ul.active {
        display: flex;
    }
    .main-nav li {
        margin: 5px 0;
        text-align: center;
        width: 100%;
    }
    
    .quick-contact-area {
        order: 2;
        width: 100%;
        justify-content: space-around;
        padding: 10px 0;
        border-top: 1px solid #444;
        margin-top: 5px;
        gap: 10px;
    }

    .phone-display {
        border-right: none;
        padding-right: 0;
        font-size: 16px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .contact-form-layout {
        grid-template-columns: 1fr;
    }
    .contact-form-layout textarea, .cta-form-button {
        grid-column: auto;
    }
    
    /* Mobil cihazlarda footer kolonları alt alta gelir ve ortalanır */
    .footer-columns, .mission-vision {
        grid-template-columns: 1fr;
        flex-direction: column;
        gap: 30px;
    }
    .footer-columns {
        text-align: center; /* Mobil görünümde metinleri ortalar */
    }
    
    .whatsapp-button {
        width: 50px;
        height: 50px;
        font-size: 24px;
        bottom: 15px;
        right: 15px;
    }
}