.single-product div.product {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 36px;
    max-width: 1320px;
    margin: 32px auto;
    padding: 0 20px;
    align-items: start;
}

.at-stage-wrap {
    position: sticky;
    top: 96px;
}

.at-stage-box {
    position: relative;
    width: 100%;
    border-radius: 20px;
    background: var(--at-surface);
    border: 1px solid var(--at-border);
    box-shadow: var(--at-shadow);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1 / 1;
}

#at-stage-canvas {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: filter 0.28s ease, transform 0.28s ease;
}

.at-stage-box.is-rendering #at-stage-canvas {
    filter: blur(7px) brightness(0.85);
    transform: scale(0.99);
}

.at-seo-img {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.at-scan-bar {
    position: absolute;
    top: -10%;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--at-gradient);
    box-shadow: 0 0 18px var(--at-lime-start);
    opacity: 0;
    pointer-events: none;
    transition: none;
}

.at-stage-box.is-rendering .at-scan-bar {
    opacity: 1;
    top: 105%;
    transition: top 0.38s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.15s ease;
}

.at-stage-badge {
    position: absolute;
    bottom: 14px;
    right: 14px;
    background: var(--at-glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--at-border);
    color: var(--at-text);
    font-size: 12px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 10px;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.2s ease, transform 0.2s ease;
    pointer-events: none;
}

.at-stage-badge.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.at-size-guide-btn {
    margin-top: 14px;
    width: 100%;
    padding: 12px 16px;
    border-radius: 14px;
    border: 1px solid var(--at-border);
    background: var(--at-surface);
    color: var(--at-text);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.at-size-guide-btn:hover {
    border-color: var(--at-lime-end);
    color: var(--at-accent-text);
}

.at-config-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.at-live-price-bar {
    background: var(--at-surface);
    border: 1px solid var(--at-border);
    border-radius: 16px;
    padding: 16px 20px;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.at-price-label {
    color: var(--at-text-muted);
    font-size: 14px;
}

.at-price-val {
    font-family: 'Alexandria', sans-serif;
    font-size: 26px;
    font-weight: 700;
    color: var(--at-accent-text);
}

.at-price-curr {
    font-size: 14px;
    font-weight: 700;
    color: var(--at-text);
}

.at-opt-section {
    background: var(--at-surface);
    border: 1px solid var(--at-border);
    border-radius: 16px;
    padding: 16px;
}

.at-opt-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--at-text);
}

.at-opt-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.at-opt-card {
    border: 1.5px solid var(--at-border);
    background: var(--at-surface-2);
    color: var(--at-text);
    border-radius: 12px;
    padding: 11px 12px;
    cursor: pointer;
    text-align: right;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.at-opt-card strong {
    font-size: 13.5px;
    font-weight: 700;
}

.at-opt-card small {
    font-size: 11.5px;
    color: var(--at-text-muted);
}

.at-opt-card.is-active {
    border-color: var(--at-lime-end);
    background: rgba(200, 251, 103, 0.08);
    box-shadow: 0 0 0 1px var(--at-lime-end);
}

html[data-theme="light"] .at-opt-card.is-active {
    background: rgba(106, 155, 0, 0.08);
}

.at-toggle-card {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
}

.at-toggle-card input {
    display: none;
}

.at-toggle-ui {
    width: 44px;
    height: 24px;
    border-radius: 20px;
    background: var(--at-surface-2);
    border: 1px solid var(--at-border);
    position: relative;
    transition: background 0.25s ease;
    flex-shrink: 0;
}

.at-toggle-ui::after {
    content: "";
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--at-text-muted);
    position: absolute;
    top: 2px;
    right: 3px;
    transition: transform 0.25s ease, background 0.25s ease;
}

.at-toggle-card input:checked + .at-toggle-ui {
    background: var(--at-gradient);
    border-color: transparent;
}

.at-toggle-card input:checked + .at-toggle-ui::after {
    transform: translateX(-18px);
    background: #0b0c0e;
}

.at-toggle-info {
    display: flex;
    flex-direction: column;
}

.at-toggle-info strong {
    font-size: 14px;
}

.at-toggle-info small {
    font-size: 12px;
    color: var(--at-accent-text);
}

.at-sub-drawer {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--at-border);
    animation: atFadeIn 0.25s ease;
}

@keyframes atFadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.at-colors-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.at-color-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 30px;
    border: 1.5px solid var(--at-border);
    background: var(--at-surface-2);
    color: var(--at-text);
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.at-color-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1px solid rgba(0,0,0,0.2);
}

.at-color-pill.is-active {
    border-color: var(--at-lime-end);
    box-shadow: 0 0 0 1px var(--at-lime-end);
}

.at-addons-stack {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.at-addon-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1.5px solid var(--at-border);
    background: var(--at-surface-2);
    cursor: pointer;
    transition: all 0.2s ease;
}

.at-addon-row.is-active {
    border-color: var(--at-lime-end);
    background: rgba(200, 251, 103, 0.07);
}

.at-gift-note {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 12px;
    background: rgba(200, 251, 103, 0.07);
    border: 1px dashed var(--at-lime-end);
    font-size: 13px;
    font-weight: 600;
}

.at-gift-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--at-lime-start);
    box-shadow: 0 0 10px var(--at-lime-start);
    flex-shrink: 0;
}

.at-submit-order-btn {
    width: 100%;
    padding: 16px;
    border-radius: 14px;
    border: none;
    background: var(--at-gradient);
    color: #0b0c0e;
    font-family: 'Alexandria', sans-serif;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: var(--at-glow);
    transition: transform 0.2s ease;
}

.at-submit-order-btn:hover {
    transform: translateY(-2px);
}

.at-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.at-modal-box {
    background: var(--at-surface);
    border: 1px solid var(--at-border);
    border-radius: 20px;
    max-width: 680px;
    width: 100%;
    overflow: hidden;
    box-shadow: var(--at-shadow);
}

.at-modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--at-border);
}

.at-modal-close {
    background: none;
    border: none;
    color: var(--at-text);
    font-size: 24px;
    cursor: pointer;
}

.at-modal-tabs {
    display: flex;
    gap: 8px;
    padding: 12px 20px;
    overflow-x: auto;
    border-bottom: 1px solid var(--at-border);
}

.at-modal-preview {
    position: relative;
    padding: 20px;
    text-align: center;
}

.at-modal-preview img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
}

.at-modal-dim-tag {
    margin-top: 10px;
    font-weight: 700;
    color: var(--at-accent-text);
}

@media (max-width: 900px) {
    .single-product div.product {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .at-stage-wrap {
        position: static;
    }
}