/* 1. RENK YÖNETİMİ */
:root {
    --bg: #ffffff;
    --section-bg: #f8f9fa;
    --primary-blue: #007AFF;
    --text-main: #1d1d1f;
    --text-dim: #6e6e73;
    --border: #e5e5e7;
    --nav-bg: rgba(255, 255, 255, 0.8);
    --card-bg: #ffffff;
}

[data-theme="dark"] {
    --bg: #000000;
    --section-bg: #0a0a0a;
    --text-main: #ffffff;
    --text-dim: #a1a1a6;
    --border: #2c2c2e;
    --nav-bg: rgba(0, 0, 0, 0.8);
    --card-bg: #1c1c1e;
}

/* 2. TEMEL AYARLAR */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: 'Plus Jakarta Sans', sans-serif; 
    background: var(--bg); 
    color: var(--text-main); 
    line-height: 1.6; 
    overflow-x: hidden; 
    transition: background 0.3s, color 0.3s;
}

/* 3. NAVİGASYON */
nav { 
    display: flex; justify-content: space-between; align-items: center; 
    padding: 15px 8%; position: fixed; width: 100%; top: 0; 
    background: var(--nav-bg); backdrop-filter: blur(10px); 
    z-index: 1000; border-bottom: 1px solid var(--border); 
}
.logo { display: flex; align-items: center; gap: 12px; font-size: 24px; font-weight: 800; color: var(--text-main); text-transform: uppercase; }
nav ul { display: flex; list-style: none; align-items: center; }
nav ul li { margin-left: 25px; }
nav ul li a { text-decoration: none; color: var(--text-main); font-size: 14px; font-weight: 600; }

/* 4. HERO BÖLÜMÜ */
header { 
    height: 85vh; display: flex; align-items: center; justify-content: center; text-align: center; 
    background: radial-gradient(circle at 50% 50%, var(--section-bg) 0%, var(--bg) 100%); padding: 0 5%; 
}
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); margin-bottom: 25px; font-weight: 800; color: var(--text-main); }
.hero h1 span { color: var(--primary-blue); }
.hero p { font-size: 1.2rem; color: var(--text-dim); max-width: 750px; margin: 0 auto 35px; }

/* 5. BUTONLAR */
.btn { padding: 16px 35px; border-radius: 12px; text-decoration: none; font-weight: 700; transition: 0.3s; display: inline-block; border: none; cursor: pointer; }
.primary { background: var(--primary-blue); color: #ffffff; margin-right: 15px; }
.secondary { border: 2px solid var(--primary-blue) !important; color: var(--primary-blue) !important; background: transparent; }
.secondary:hover { background: var(--primary-blue); color: #fff !important; }

/* 6. TECH SLIDER */
.tech-slider { background: var(--bg); padding: 25px 0; overflow: hidden; white-space: nowrap; border-bottom: 1px solid var(--border); }
.slider-track { display: inline-block; animation: scroll 35s linear infinite; }
.slider-track span { color: var(--text-dim); font-weight: 600; font-size: 0.9rem; margin: 0 40px; }
.slider-track i { margin-right: 10px; color: var(--primary-blue); }
@keyframes scroll { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* 7. GRID VE KARTLAR */
section { padding: 90px 8%; }
.section-title { text-align: center; font-size: 2.2rem; margin-bottom: 60px; font-weight: 800; color: var(--text-main); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 25px; }
.card { background: var(--card-bg); padding: 45px 35px; border-radius: 24px; border: 1px solid var(--border); transition: 0.4s; }
.card:hover { border-color: var(--primary-blue); transform: translateY(-8px); }
.card i { font-size: 32px; color: var(--primary-blue); margin-bottom: 25px; display: block; }
.card h3 { color: var(--text-main); margin-bottom: 10px; }
.card p { color: var(--text-dim); }

/* 8. WHATSAPP & FOOTER */
.whatsapp-float { position: fixed; bottom: 30px; right: 30px; background: #25d366; color: white; width: 60px; height: 60px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 30px; z-index: 1000; text-decoration: none; }
footer { padding: 60px 8%; text-align: center; border-top: 1px solid var(--border); background: var(--bg); }
footer h3 { color: var(--text-main); }

/* MOBİL UYUM */
@media (max-width: 768px) {
    nav ul { display: none; }
    .hero h1 { font-size: 1.9rem; }
    .primary, .secondary { width: 100%; text-align: center; margin: 5px 0; }
}
#quote-form input:focus, #quote-form select:focus, #quote-form textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

@media (max-width: 768px) {
    #quote-form div {
        grid-template-columns: 1fr !important;
    }
}
.process-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.process-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-blue);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.process-number {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary-blue);
    opacity: 0.1;
    position: absolute;
    top: -10px;
    right: 10px;
    font-family: 'Inter', sans-serif;
}

.process-card h3 {
    margin-bottom: 15px;
    font-size: 1.4rem;
    color: var(--text-main);
}

.process-card p {
    color: var(--text-dim);
    line-height: 1.6;
    font-size: 0.95rem;
}
.project-image.lumina-bg {
    height: 220px;
    background-image: url('images/lumina-preview.png'); /* Klasör yolun doğru olmalı */
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid var(--border);
    transition: transform 0.5s ease;
}

/* Kartın üzerine gelince görsel hafifçe büyüsün (Premium Efekt) */
.portfolio-card:hover .lumina-bg {
    transform: scale(1.05);
}