/* =========================================
   1. GENEL AYARLAR VE DEĞİŞKENLER
   ========================================= */
:root {
    /* Renk Paleti - Kurumsal & Endüstriyel */
    --color-primary: #FFD700; /* İnşaat/Sanayi vurgusu için Altın Sarısı */
    --color-text-light: #ffffff;
    --color-text-muted: #cccccc;
    --color-overlay: rgba(15, 23, 42, 0.85); /* Koyu Lacivert/Siyah tonlu overlay */
    --color-bg-dark: #0f172a;
    
    /* Font Ailesi */
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Manrope', sans-serif;

    /* Spacing & Layout */
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
}

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

html, body {
    width: 100%;
    height: 100%;
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-light);
    background-color: var(--color-bg-dark);
    overflow: hidden; /* Tam ekran deneyimi için scroll kapalı */
}

/* =========================================
   2. ARKAPLAN VE OVERLAY
   ========================================= */
.background-slider {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.slide-construction {
    width: 100%;
    height: 100%;
    /* Örnek bir inşaat/şehir silüeti görseli placeholder'ı. 
       Gerçek projede buraya yüksek çözünürlüklü proje görseli gelecektir. */
    background-image: url('https://images.unsplash.com/photo-1503387762-592deb58ef4e?q=80&w=2689&auto=format&fit=crop'); 
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    /* Hafif bir zoom efekti */
    animation: zoomEffect 20s infinite alternate;
}

@keyframes zoomEffect {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-overlay);
    background: linear-gradient(135deg, rgba(15,23,42, 0.95) 0%, rgba(15,23,42, 0.7) 100%);
    z-index: -1;
    backdrop-filter: blur(3px); /* Hafif buzlu cam efekti */
}

/* =========================================
   3. ANA YERLEŞİM (LAYOUT)
   ========================================= */
.main-wrapper {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--spacing-md);
}

/* Header */
.site-header {
    width: 100%;
    display: flex;
    justify-content: flex-start;
    padding-top: var(--spacing-sm);
}

.logo-container {
    border: 2px solid var(--color-text-light);
    padding: 0.5rem 1.5rem;
    display: inline-block;
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.2rem;
    text-transform: uppercase;
    color: var(--color-text-light);
}

/* Merkez İçerik */
.content-area {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center; /* Ortalar */
    text-align: left; /* Metin hizalaması, modern görünüm için sola dayalı daha iyidir */
    padding: 0 var(--spacing-lg);
}

.content-box {
    max-width: 800px;
    width: 100%;
}

/* =========================================
   4. TİPOGRAFİ VE İÇERİK STİLLERİ
   ========================================= */
.sub-heading {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 300;
    letter-spacing: 0.3rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 0.5s;
}

.main-heading {
    font-family: var(--font-heading);
    font-size: 5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 0.8s;
}

.description-text {
    font-size: 1.1rem;
    font-weight: 300;
    color: var(--color-text-muted);
    max-width: 600px;
    margin-bottom: 3rem;
    opacity: 0;
    animation: fadeInUp 1s ease forwards 1.1s;
}

/* =========================================
   5. YÜKLENİYOR ÇUBUĞU (LOADING BAR)
   ========================================= */
.loading-bar-container {
    width: 100%;
    max-width: 300px;
    height: 4px;
    background-color: rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeIn 1s ease forwards 1.4s;
}

.loading-bar {
    width: 40%;
    height: 100%;
    background-color: var(--color-primary);
    position: absolute;
    left: -40%;
    animation: loadingMove 2s infinite ease-in-out;
}

@keyframes loadingMove {
    0% { left: -40%; }
    50% { left: 100%; }
    100% { left: 100%; }
}

.status-text {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    letter-spacing: 0.05rem;
    opacity: 0;
    animation: fadeIn 1s ease forwards 1.6s;
}

/* =========================================
   6. FOOTER VE MARKA İMZASI
   ========================================= */
.site-footer {
    width: 100%;
    padding-bottom: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    opacity: 0;
    animation: fadeIn 1s ease forwards 2s;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.powered-by {
    font-family: var(--font-heading);
    letter-spacing: 0.05rem;
    text-transform: uppercase;
}

.agency-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 700;
    transition: color 0.3s ease;
    border-bottom: 1px solid transparent;
}

.agency-link:hover {
    color: var(--color-primary);
    border-bottom: 1px solid var(--color-primary);
}

/* =========================================
   7. ANİMASYON KEYFRAMES
   ========================================= */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* =========================================
   8. RESPONSIVE / MOBİL UYUMLULUK
   ========================================= */
@media (max-width: 768px) {
    .main-heading {
        font-size: 3rem; /* Mobilde başlık küçültülür */
    }

    .content-area {
        padding: 0 var(--spacing-sm);
        justify-content: center;
        text-align: center; /* Mobilde ortalı hizalama daha dengeli durur */
    }

    .content-box {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .footer-content {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .logo-container {
        margin: 0 auto; /* Logoyu ortalar */
    }
    
    .site-header {
        justify-content: center;
    }
}