/* =========================================
   REFERENCES PAGE (PREMIUM SHOWCASE)
   ========================================= */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700;800&display=swap');

:root {
    --bg-body: #ffffff;
    --primary: #4f46e5;
    --secondary: #0f172a;
    --text-main: #334155;
    --text-muted: #64748b;
}

body {
    background-color: var(--bg-body);
    font-family: 'Outfit', sans-serif;
    color: var(--text-main);
    overflow-x: hidden;
}

/* 1. HERO SECTION */
.ref-hero {
    padding: 160px 0 100px;
    background: radial-gradient(circle at center, #f1f5f9 0%, #ffffff 70%);
    text-align: center;
}
.hero-badge {
    display: inline-block; padding: 8px 25px; border-radius: 50px;
    background: #fff; color: var(--secondary); font-weight: 700; font-size: 0.9rem;
    margin-bottom: 25px; border: 1px solid #e2e8f0; letter-spacing: 1px;
}
.hero-title {
    font-size: 4rem; font-weight: 900; line-height: 1.1; margin-bottom: 20px;
    color: var(--secondary); letter-spacing: -2px;
}
.hero-desc {
    font-size: 1.25rem; color: var(--text-muted); max-width: 700px; margin: 0 auto;
}

/* 2. STATS BAR (SAYAÇLAR) */
.stats-bar {
    padding: 60px 0; border-bottom: 1px solid #f1f5f9; background: white;
}
.stats-grid {
    display: flex; justify-content: center; gap: 80px; flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num { font-size: 3rem; font-weight: 800; color: var(--primary); display: block; line-height: 1; margin-bottom: 10px; }
.stat-label { font-size: 1rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }

/* 3. PREMIUM SHOWCASE GRID (REFERANSLAR) */
.showcase-section { padding: 100px 0; }
.showcase-header { text-align: center; margin-bottom: 60px; }

.showcase-grid {
    display: grid; 
    grid-template-columns: repeat(4, 1fr); /* 4'lü Ferah Izgara */
    gap: 40px; 
}

/* KART TASARIMI */
.ref-card {
    height: 250px; /* Sabit yükseklik */
    border-radius: 24px;
    position: relative;
    overflow: hidden; /* Dışarı taşanı gizle */
    box-shadow: 0 20px 40px -5px rgba(0,0,0,0.1);
    cursor: pointer;
    background: #f1f5f9;
}

/* Arka Plan Resmi */
.ref-img {
    width: 100%; height: 100%;
    object-fit: cover; /* Resmi kutuya sığdır */
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Hover Efekti: Resim Yaklaşsın */
.ref-card:hover .ref-img {
    transform: scale(1.1); /* Resim büyür */
    filter: blur(4px); /* Resim bulanıklaşır */
}

/* Overlay (Kayan Yazı Alanı) */
.ref-overlay {
    position: absolute; inset: 0; /* Tüm alanı kapla */
    background: rgba(15, 23, 42, 0.7); /* Koyu Yarı Saydam */
    display: flex; flex-direction: column; 
    justify-content: center; align-items: center; text-align: center;
    padding: 20px;
    
    /* Başlangıçta Görünmez ve Aşağıda */
    opacity: 0;
    transform: translateY(100%); 
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Hover Olunca Overlay Yukarı Çıksın */
.ref-card:hover .ref-overlay {
    opacity: 1;
    transform: translateY(0);
}

.ref-logo { 
    max-width: 120px; filter: brightness(0) invert(1); /* Logoyu beyaz yap */
    margin-bottom: 15px; 
}
.ref-name { font-size: 1.4rem; font-weight: 700; color: white; margin-bottom: 5px; }
.ref-category { font-size: 0.9rem; color: #cbd5e1; font-weight: 500; text-transform: uppercase; letter-spacing: 1px; }

/* 4. MÜŞTERİ YORUMLARI */
.reviews-section { padding: 100px 0; background: #f8fafc; border-top: 1px solid #e2e8f0; }
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.review-card {
    background: white; padding: 40px; border-radius: 24px;
    border: 1px solid #e2e8f0; box-shadow: 0 10px 20px rgba(0,0,0,0.03);
    transition: 0.3s;
}
.review-card:hover { transform: translateY(-5px); border-color: var(--primary); }
.review-text { font-size: 1.05rem; color: var(--text-main); line-height: 1.7; margin-bottom: 25px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 15px; }
.author-avatar { width: 50px; height: 50px; border-radius: 50%; object-fit: cover; }

/* RESPONSIVE */
@media (max-width: 1200px) {
    .showcase-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 992px) {
    .showcase-grid { grid-template-columns: repeat(2, 1fr); }
    .reviews-grid { grid-template-columns: 1fr; }
    .stats-grid { gap: 40px; }
    .hero-title { font-size: 3rem; }
}
@media (max-width: 600px) {
    .showcase-grid { grid-template-columns: 1fr; }
}