/* ==========================================================================
   GEFSUN DIJITAL - DESIGN SYSTEM & UI TOKENS
   Theme: Minimal Corporate & High-Contrast Red
========================================================================== */

:root {
    /* Color Palette */
    --color-primary: #D90429;        
    --color-primary-hover: #BF0323;  
    --color-primary-soft: rgba(217, 4, 41, 0.08); 
    
    --color-dark: #0A0A0A;           
    --color-dark-card: #141414;      
    --color-dark-muted: #555555;     
    
    --color-light: #FFFFFF;          
    --color-light-alt: #F8F9FA;      
    --color-border: #EAEAEA;         

    /* Typography */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Shadows (Ferah, Premium Gölgeler) */
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 20px 40px rgba(217, 4, 41, 0.15);
    
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* ================= GLOBAL RESETS & YATAY KAYMA KORUMASI ================= */
body, html {
    font-family: var(--font-body);
    background-color: var(--color-light);
    color: var(--color-dark-muted);
    -webkit-font-smoothing: antialiased;
    line-height: 1.7;
    overflow-x: hidden; /* Mobildeki yatay beyaz boşlukları engeller */
    width: 100%;
}

h1, h2, h3, h4, h5, h6, .brand-font {
    font-family: var(--font-heading);
    color: var(--color-dark);
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* ================= UTILITY CLASSES ================= */
.text-primary-brand { color: var(--color-primary) !important; }
.bg-primary-brand { background-color: var(--color-primary) !important; color: #FFF; }
.bg-primary-soft { background-color: var(--color-primary-soft) !important; color: var(--color-primary); border: 1px solid rgba(217, 4, 41, 0.1); }
.tracking-wide { letter-spacing: 1.5px; }
.max-w-700 { max-width: 700px; }

/* ================= BUTTONS ================= */
.btn-brand {
    background-color: var(--color-primary);
    color: #FFF;
    border: 2px solid var(--color-primary);
    padding: 14px 32px;
    font-weight: 600;
    border-radius: 8px; 
    transition: var(--transition);
}
.btn-brand:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: #FFF;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}
.btn-outline-brand {
    background-color: transparent;
    color: var(--color-dark);
    border: 2px solid var(--color-dark);
    padding: 14px 32px;
    font-weight: 600;
    border-radius: 8px;
    transition: var(--transition);
}
.btn-outline-brand:hover {
    background-color: var(--color-dark);
    color: #FFF;
    transform: translateY(-2px);
}

/* ================= CARDS & HOVER LIFT ================= */
.corporate-card {
    background-color: var(--color-light);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    transition: var(--transition);
}
.hover-lift { transition: var(--transition); }
.hover-lift:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary) !important;
}

/* ================= PROCESS TIMELINE ================= */
.process-step { position: relative; padding-left: 50px; margin-bottom: 40px; }
.process-step::before { content: ''; position: absolute; left: 19px; top: 40px; bottom: -40px; width: 2px; background-color: var(--color-border); }
.process-step:last-child::before { display: none; }
.process-icon {
    position: absolute; left: 0; top: 0; width: 40px; height: 40px;
    background-color: var(--color-primary-soft); color: var(--color-primary); border-radius: 50%;
    display: flex; align-items: center; justify-content: center; font-weight: 700;
    border: 2px solid var(--color-light); box-shadow: 0 0 0 4px var(--color-light); z-index: 2;
}

/* ================= MEGA MENU (MOBİL & MASAÜSTÜ) ================= */
@media (min-width: 992px) {
    .dropdown-mega { position: static !important; }
    .dropdown-mega-menu { 
        width: 100%; max-width: 1200px; 
        left: 50% !important; transform: translateX(-50%) !important; 
        padding: 40px; border: 1px solid var(--color-border); border-radius: 0 0 16px 16px; 
        box-shadow: var(--shadow-md); margin-top: 15px !important; 
    }
    .mega-menu-col:not(:first-child) {
        border-left: 1px solid var(--color-border);
        padding-left: 1.5rem;
    }
}

@media (max-width: 991px) {
    /* Mobilde taşmayı önleyen Scroll yapısı */
    .navbar-collapse {
        max-height: 85vh;
        overflow-y: auto;
        background-color: #fff;
        padding: 1rem;
        border-radius: 0 0 16px 16px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    }
    .dropdown-mega-menu {
        background-color: var(--color-light-alt) !important;
        border-radius: 12px;
        padding: 15px;
        margin-top: 10px;
        border: none;
    }
    .mega-menu-col {
        padding-bottom: 20px;
        margin-bottom: 20px;
        border-bottom: 1px solid var(--color-border);
    }
    .mega-menu-col:last-child {
        border-bottom: none;
        padding-bottom: 0;
        margin-bottom: 0;
    }
    .mega-menu-title {
        font-size: 13px;
        margin-bottom: 15px;
    }
    .mega-menu-item {
        padding: 10px 0; /* Mobilde parmakla dokunmayı kolaylaştırır */
    }
}

.mega-menu-title { font-family: var(--font-heading); font-size: 14px; color: var(--color-dark); font-weight: 800; text-transform: uppercase; letter-spacing: 1px; border-bottom: 2px solid var(--color-primary); padding-bottom: 12px; margin-bottom: 20px; }
.mega-menu-item { display: block; color: var(--color-dark-muted); text-decoration: none; padding: 8px 0; font-weight: 500; transition: var(--transition); font-size: 15px; }
.mega-menu-item:hover { color: var(--color-primary); padding-left: 8px; }

/* ================= COMPONENTS (Marquee, Hero) ================= */
.marquee-container { overflow: hidden; white-space: nowrap; position: relative; width: 100%; max-width: 100vw; }
.marquee-content { display: inline-block; animation: marquee 30s linear infinite; }
.marquee-item { display: inline-block; padding: 0 40px; font-family: var(--font-heading); font-weight: 800; font-size: 1.5rem; color: #D5D5D5; transition: var(--transition); cursor: default; }
.marquee-item:hover { color: var(--color-dark); }
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

.hero-abstract { width: 100%; height: 450px; background: linear-gradient(135deg, #F9F9F9 0%, #FFFFFF 100%); border: 1px solid var(--color-border); border-radius: 24px; position: relative; display: flex; align-items: center; justify-content: center; }

/* ================= DUAL PILLAR CARDS (İki Ana Motor) ================= */
.pillar-card {
    background-color: var(--color-dark-card); border-radius: 24px; border: 1px solid rgba(255,255,255,0.05); position: relative; overflow: hidden; color: #FFF; z-index: 1;
}
.pillar-card::before {
    content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at center, rgba(217, 4, 41, 0.08) 0%, transparent 60%); z-index: -1; opacity: 0.5; transition: var(--transition);
}
.pillar-card:hover::before { opacity: 1; }

/* ================= MEGA FOOTER ================= */
.creative-footer { background-color: var(--color-dark); padding-top: 80px; color: #ffffff; border-top: 4px solid var(--color-primary); overflow-x: hidden; }
.footer-heading { font-size: clamp(2.5rem, 5vw, 4.5rem); letter-spacing: -2px; line-height: 1.1; }
.brand-card { background: rgba(255, 255, 255, 0.02); border: 1px solid rgba(255, 255, 255, 0.06); transition: var(--transition); }
.brand-card:hover { transform: translateY(-5px); background: rgba(255, 255, 255, 0.05); border-color: rgba(255,255,255,0.2); }

/* ================= PORTFOLIO FILTER & CARDS ================= */
.portfolio-filter .btn {
    border-radius: 50px;
    padding: 8px 24px;
    font-weight: 600;
    font-size: 14px;
    color: var(--color-dark-muted);
    border: 1px solid var(--color-border);
    background: transparent;
    transition: var(--transition);
}
.portfolio-filter .btn:hover,
.portfolio-filter .btn.active {
    background: var(--color-dark);
    color: #fff;
    border-color: var(--color-dark);
}
.portfolio-card {
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--color-border);
    background: var(--color-light);
}
.portfolio-card-img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1);
}
.portfolio-card:hover .portfolio-card-img {
    transform: scale(1.05);
}
.portfolio-card-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to top, rgba(10,10,10,0.9) 0%, rgba(10,10,10,0.1) 60%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    opacity: 0;
    transition: var(--transition);
}
.portfolio-card:hover .portfolio-card-overlay {
    opacity: 1;
}

/* ================= PREMIUM PORTFOLIO HOVER EFFECTS (Referans Sayfaları İçin) ================= */
.group-hover-target .hover-scale { transition: transform 0.6s cubic-bezier(0.165, 0.84, 0.44, 1); }
.group-hover-target:hover .hover-scale { transform: scale(1.03); }

.group-hover-target .hover-overlay { opacity: 0; background-color: rgba(17, 17, 17, 0.4) !important; }
.group-hover-target:hover .hover-overlay { opacity: 1; }

.group-hover-target .hover-icon { opacity: 0; transform: translate(-50%, -20%) !important; transition: all 0.4s ease; }
.group-hover-target:hover .hover-icon { opacity: 1; transform: translate(-50%, -50%) !important; }

.group-hover-target .hover-text-primary { transition: color 0.3s ease; }
.group-hover-target:hover .hover-text-primary { color: var(--color-primary) !important; }

/* ================= PREMIUM ACCORDION (FAQ) ================= */
.accordion-corporate {
    --bs-accordion-bg: transparent;
    --bs-accordion-border-color: var(--color-border);
    --bs-accordion-border-width: 0 0 1px 0;
    --bs-accordion-border-radius: 0;
    --bs-accordion-btn-focus-box-shadow: none;
}
.accordion-corporate .accordion-item {
    border-bottom: 1px solid var(--color-border);
    border-top: none;
    border-left: none;
    border-right: none;
    background: transparent;
}
.accordion-corporate .accordion-item:first-of-type { border-top: 1px solid var(--color-border); }
.accordion-corporate .accordion-button {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-dark);
    padding: 24px 0;
    background: transparent;
}
.accordion-corporate .accordion-button:not(.collapsed) {
    color: var(--color-primary);
    background: transparent;
    box-shadow: none;
}
.accordion-corporate .accordion-button::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23111111'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}
.accordion-corporate .accordion-button:not(.collapsed)::after {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23D90429'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
}
.accordion-corporate .accordion-body {
    padding: 0 0 24px 0;
    color: var(--color-dark-muted);
    font-size: 1.05rem;
}

/* ================= FLOATING WHATSAPP & MOBİL OPTİMİZASYON ================= */
.floating-whatsapp { 
    position: fixed; bottom: 30px; right: 30px; width: 60px; height: 60px; 
    background-color: #25d366; color: white; border-radius: 50%; 
    display: flex; align-items: center; justify-content: center; font-size: 30px; 
    box-shadow: 0px 8px 20px rgba(37, 211, 102, 0.4); z-index: 1000; transition: var(--transition); text-decoration: none; 
}
.floating-whatsapp:hover { background-color: #128c7e; transform: translateY(-5px) scale(1.1); color: white; box-shadow: 0px 12px 25px rgba(37, 211, 102, 0.6); }

/* GENEL MOBİL DÜZELTMELER */
@media (max-width: 768px) {
    .floating-whatsapp {
        bottom: 20px; right: 20px; width: 50px; height: 50px; font-size: 26px;
    }
    .hero-section { text-align: center; }
    .hero-section .badge { margin-left: auto; margin-right: auto; }
    .hero-section .d-flex.gap-4 { justify-content: center; flex-wrap: wrap; gap: 15px !important; }
    .hero-section .btn-brand, .hero-section .btn-outline-brand, .hero-section .btn-dark { width: 100%; margin-bottom: 10px; justify-content: center; }
    
    .display-3 { font-size: 2.5rem; }
    .display-4 { font-size: 2.2rem; }
    .display-5 { font-size: 1.8rem; }
    
    .process-step { padding-left: 40px; }
    .process-icon { width: 32px; height: 32px; font-size: 14px; top: 2px; }
    .process-step::before { left: 15px; }
}


.hero-icon-animation-wrapper {
    transition: var(--transition);
}
.hero-icon-animation-wrapper:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary-soft) !important;
    box-shadow: 0 1rem 3rem rgba(217, 4, 41, 0.05) !important;
}

/* İkon Slaytları */
.icon-slide {
    position: absolute;
    text-align: center;
    opacity: 0; /* Başlangıçta gizli */
    transform: scale(0.8) translateY(20px); /* Başlangıç pozisyonu */
    animation: iconSequence 12s infinite; /* 12 saniyelik sonsuz döngü */
}

/* Her slayt için gecikme (delay) ayarı */
.slide-1 { animation-delay: 0s; }
.slide-2 { animation-delay: 4s; } /* 4 saniye sonra başla */
.slide-3 { animation-delay: 8s; } /* 8 saniye sonra başla */

/* Animasyon Metodolojisi (Keyframes) */
@keyframes iconSequence {
    /* 0% - 10%: İçeri Girme (Fade In + Scale) */
    0%, 10% {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }
    /* 15% - 30%: Ekranda Kalma (Maksimum Görünürlük) */
    15%, 30% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
    /* 35% - 100%: Dışarı Çıkma (Fade Out + Scale Down) */
    35%, 100% {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
}

/* İkon Renk Değişkenleri (Eğer style.css'te yoksa ekle) */
.text-primary-brand { color: var(--color-primary) !important; }