/* ============================================
   COLLIER PRODUCT - Specific styles
   ============================================ */

/* ========== CHAIN LENGTH GUIDE ========== */
.chain-guide-section {
    margin-top: 5rem;
    padding-top: 4rem;
    border-top: 1px solid rgba(255,255,255,0.06);
}
.chain-guide-title {
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
    text-align: center;
    margin-bottom: 0.5rem;
}
.chain-guide-subtitle {
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 1rem;
    margin-bottom: 3rem;
}
.chain-guide-content {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
    align-items: start;
}
.chain-visual {
    position: sticky;
    top: 120px;
}
.chain-silhouette {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 20px;
    padding: 2rem 1rem;
    text-align: center;
}
.silhouette-svg {
    width: 100%;
    max-width: 200px;
    height: auto;
}
.chain-details {
    display: flex;
    flex-direction: column;
    gap: 0;
}
.chain-option {
    padding: 1.2rem 1.5rem;
    border: 1px solid rgba(255,255,255,0.06);
    border-bottom: none;
    background: rgba(255,255,255,0.02);
    cursor: pointer;
    transition: all 0.3s ease;
}
.chain-option:first-child {
    border-radius: 16px 16px 0 0;
}
.chain-option:last-of-type {
    border-bottom: 1px solid rgba(255,255,255,0.06);
    border-radius: 0 0 16px 16px;
}
.chain-option:hover {
    background: rgba(255,255,255,0.04);
}
.chain-option.active,
.chain-option.recommended.active {
    background: rgba(231,76,60,0.08);
    border-color: rgba(231,76,60,0.3);
}
.chain-option.active + .chain-option {
    border-top-color: rgba(231,76,60,0.3);
}
.chain-option.recommended {
    background: rgba(231,76,60,0.04);
    border-color: rgba(231,76,60,0.15);
}
.chain-option-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.4rem;
}
.chain-length {
    font-size: 1.1rem;
    font-weight: 800;
    color: #fff;
    min-width: 50px;
}
.chain-style {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    font-weight: 600;
}
.chain-badge {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: #fff;
    padding: 0.2rem 0.7rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}
.chain-option p {
    color: rgba(255,255,255,0.45);
    font-size: 0.85rem;
    line-height: 1.6;
    margin: 0;
}
.chain-tip {
    margin-top: 1.5rem;
    padding: 1.2rem 1.5rem;
    background: rgba(231,76,60,0.06);
    border: 1px solid rgba(231,76,60,0.15);
    border-radius: 14px;
    color: rgba(255,255,255,0.6);
    font-size: 0.88rem;
    line-height: 1.6;
}
.chain-tip strong {
    color: #e74c3c;
}

@media (max-width: 768px) {
    .chain-guide-content {
        grid-template-columns: 1fr;
    }
    .chain-visual {
        position: static;
        display: flex;
        justify-content: center;
    }
    .chain-silhouette {
        max-width: 250px;
    }
    .chain-guide-title {
        font-size: 1.5rem;
    }
}