/* ========== REFERANSLAR SECTION ========== */
.referanslar {
    position: relative;
    padding: 96px 0;
    overflow: hidden;
}

.referanslar::before {
    content: '';
    position: absolute;
    bottom: -200px;
    right: -200px;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(134,183,106,0.08), transparent 70%);
    border-radius: 50%;
    filter: blur(100px);
    animation: refGlow 15s ease-in-out infinite;
}

@keyframes refGlow {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.4; }
    50% { transform: translate(-100px, -100px) scale(1.3); opacity: 0.6; }
}

/* ========== REFERANS GRID ========== */
.referans-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
    margin-bottom: 80px;
}

/* ========== REFERANS CARD ========== */
.referans-card {
    position: relative;
    height: 420px;
    perspective: 1500px;
    opacity: 0;
    transform: translate3d(0, 80px, -150px) rotateX(25deg);
    transition: all 1200ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.referans-card.visible {
    opacity: 1;
    transform: translate3d(0, 0, 0) rotateX(0);
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transition: transform 800ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.referans-card:hover .card-inner {
    transform: rotateY(180deg);
}

/* ========== CARD FRONT ========== */
.card-front,
.card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 28px;
    overflow: hidden;
}

.card-front {
    background: radial-gradient(circle at top left, rgba(134,183,106,0.1), rgba(10,14,11,0.95));
    border: 1px solid rgba(134,183,106,0.2);
    box-shadow: 0 30px 80px rgba(0,0,0,0.9);
}

.card-image-wrapper {
    position: relative;
    width: 100%;
    height: 280px;
    overflow: hidden;
}

.card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 800ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.referans-card:hover .card-image {
    transform: scale(1.15);
}

.card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(5,7,6,0.9) 100%);
}

.card-logo {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 140px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(247,243,233,0.95);
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.8);
    border: 2px solid rgba(134,183,106,0.3);
    transition: all 600ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.referans-card:hover .card-logo {
    transform: translateX(-50%) translateY(-10px) scale(1.1);
    box-shadow: 0 20px 60px rgba(0,0,0,0.95), 0 0 40px rgba(134,183,106,0.4);
}

.logo-placeholder {
    font-size: 16px;
    font-weight: 700;
    color: var(--olive-deep);
    letter-spacing: 0.05em;
}

/* ========== CARD BACK ========== */
.card-back {
    transform: rotateY(180deg);
    background: radial-gradient(circle at top left, rgba(134,183,106,0.15), rgba(10,14,11,0.98));
    border: 1px solid rgba(134,183,106,0.4);
    box-shadow: 0 30px 80px rgba(0,0,0,0.95), 0 0 60px rgba(134,183,106,0.3);
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 20px;
}

.ref-title {
    font-family: 'Playfair Display', serif;
    font-size: 28px;
    line-height: 1.2;
    color: var(--text-light);
    margin-bottom: 12px;
}

.ref-description {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-muted);
    flex: 1;
}

.ref-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 20px;
    border-top: 1px solid rgba(134,183,106,0.2);
}

.ref-year,
.ref-category {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-green);
    font-weight: 600;
}

.ref-category {
    color: var(--accent-gold);
}

/* ========== 3D TILT EFFECT ========== */
.referans-card[data-tilt] {
    transform-style: preserve-3d;
    will-change: transform;
}

/* ========== STATS SECTION ========== */
.referans-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
    padding: 60px 40px;
    border-radius: 32px;
    background: radial-gradient(circle at top, rgba(134,183,106,0.08), transparent);
    border: 1px solid rgba(134,183,106,0.2);
    opacity: 0;
    transform: translateY(60px);
    transition: all 1000ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.referans-stats.visible {
    opacity: 1;
    transform: translateY(0);
}

.stat-item {
    text-align: center;
    padding: 20px;
    border-radius: 20px;
    background: rgba(134,183,106,0.05);
    border: 1px solid rgba(134,183,106,0.1);
    transition: all 600ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.stat-item:hover {
    transform: translateY(-10px) scale(1.05);
    background: rgba(134,183,106,0.12);
    border-color: rgba(134,183,106,0.4);
    box-shadow: 0 20px 50px rgba(0,0,0,0.9), 0 0 40px rgba(134,183,106,0.3);
}

.stat-number {
    font-family: 'Playfair Display', serif;
    font-size: 56px;
    font-weight: 700;
    background: linear-gradient(120deg, var(--accent-gold), var(--accent-green));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 12px;
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    font-weight: 600;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 991px) {
    .referans-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 24px;
    }
    
    .referans-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .referanslar {
        padding: 80px 0;
    }
    
    .referans-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 20px;
        margin-bottom: 60px;
    }
    
    .referans-card {
        height: 380px;
    }
    
    .card-image-wrapper {
        height: 240px;
    }
    
    .card-back {
        padding: 30px;
    }
    
    .ref-title {
        font-size: 24px;
    }
    
    .referans-stats {
        grid-template-columns: minmax(0, 1fr);
        gap: 16px;
        padding: 40px 24px;
    }
    
    .stat-number {
        font-size: 42px;
    }
}