/* =====================================================
   SOLUTION DESIGNER — dùng biến từ variables.css
   ===================================================== */

/* ── STEP INDICATOR ── */
.sd-step-indicator {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 36px;
}
.sd-step-dot {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: var(--font-body);
    color: var(--color-subtext);
    font-weight: 500;
    transition: color 0.3s;
}
.sd-step-dot .dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--color-subtext);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    transition: all 0.3s;
    background: #fff;
    flex-shrink: 0;
}
.sd-step-dot.active {
    color: var(--color-main);
}
.sd-step-dot.active .dot {
    background: var(--color-main);
    border-color: var(--color-main);
    color: #fff;
}
.sd-step-dot.completed .dot {
    background: var(--color-main);
    border-color: var(--color-main);
    color: #fff;
    font-size: 0;
}
.sd-step-dot.completed .dot::after {
    content: '✓';
    font-size: 14px;
    color: #fff;
}
.sd-step-line {
    flex: 1;
    height: 2px;
    background: #e0e0e0;
    margin: 0 16px;
    max-width: 80px;
}

/* ── PAGE WRAPPER ── */
.sd-page {
    max-width: 1500px;
    margin: 0 auto;
    border-top: 90px solid var(--color-main);
    padding: 0px 24px 80px;
}
.sd-page-title {
    font-size: var(--font-medium);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}
.sd-page-subtitle {
    font-size: var(--font-body);
    color: var(--color-subtext);
    margin-bottom: 32px;
}

/* ── STEP 1: DOOR TYPE SELECTION ── */
#sd-step1 {
    animation: sdFadeIn 0.3s ease;
}
.sd-step1-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 18px;
}
.sd-door-card {
    background: #fff;
    border: 2px solid #eee;
    border-radius: 14px;
    overflow: hidden;
    cursor: pointer;
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
    display: flex;
    flex-direction: column;
}
.sd-door-card:hover {
    border-color: var(--color-main);
    transform: translateY(-4px);
    box-shadow: 0 10px 28px rgba(255, 157, 0, 0.15);
}
.sd-door-card.selected {
    border-color: var(--color-main);
    box-shadow: 0 0 0 3px rgba(255, 157, 0, 0.2);
}
.sd-door-card-visual {
    height: 180px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.sd-door-card-img {
    height: 100%;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    object-position: bottom center;
    display: block;
    filter: drop-shadow(0 4px 12px rgba(0,0,0,0.35));
    transition: transform 0.25s ease;
}
.sd-door-card:hover .sd-door-card-img {
    transform: scale(1.04) translateY(-4px);
}
.sd-door-silhouette-wrap {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 3px;
    height: 130px;
}
.sd-door-panel {
    width: 54px;
    height: 120px;
    border-radius: 3px 3px 0 0;
    border: 5px solid rgba(255,255,255,0.25);
    position: relative;
    background: rgba(255,255,255,0.12);
}
.sd-door-panel::before {
    content: '';
    position: absolute;
    inset: 8px 6px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 1px;
}
.sd-door-panel.sm {
    width: 30px;
    height: 100px;
}
/* Hinge dots */
.sd-door-panel::after {
    content: '';
    position: absolute;
    left: -1px;
    top: 22%;
    width: 5px;
    height: 5px;
    background: rgba(255,255,255,0.5);
    border-radius: 1px;
    box-shadow: 0 28px 0 rgba(255,255,255,0.5), 0 56px 0 rgba(255,255,255,0.5);
}
/* Handle dot */
.sd-door-handle-dot {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 16px;
    background: rgba(255,255,255,0.6);
    border-radius: 3px;
}
.sd-door-card-body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.sd-door-card-body h3 {
    font-size: var(--font-body);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
    line-height: 1.4;
}
.sd-door-card-body p {
    font-size: 12px;
    color: var(--color-subtext);
    line-height: 1.5;
    flex: 1;
}
.sd-door-card-btn {
    display: block;
    width: 100%;
    padding: 10px;
    margin-top: 14px;
    background: transparent;
    border: 1.5px solid var(--color-main);
    border-radius: 8px;
    color: var(--color-main);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    text-align: center;
}
.sd-door-card:hover .sd-door-card-btn,
.sd-door-card.selected .sd-door-card-btn {
    background: var(--color-main);
    color: #fff;
}

/* ── STEP 2: CONFIGURATOR ── */
#sd-step2 {
    display: none;
    animation: sdFadeIn 0.3s ease;
}
#sd-step2.visible {
    display: block;
}
.sd-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-body);
    color: var(--color-subtext);
    text-decoration: none;
    margin-bottom: 20px;
    cursor: pointer;
    transition: color 0.2s;
    background: none;
    border: none;
    padding: 0;
}
.sd-back-link:hover { color: var(--color-main); }

.sd-door-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 157, 0, 0.1);
    border: 1px solid rgba(255, 157, 0, 0.3);
    border-radius: 20px;
    padding: 6px 14px;
    font-size: 13px;
    color: var(--color-main);
    font-weight: 600;
    margin-bottom: 20px;
}
.sd-door-badge span { font-weight: 400; color: var(--color-subtext); font-size: 12px; }

/* ── 3-COLUMN CONFIGURATOR: Trái | Giữa (preview) | Phải ── */
.sd-configurator {
    display: grid;
    grid-template-columns: 268px 1fr 268px;
    gap: 16px;
    height: calc(100vh - 260px);
    min-height: 640px;
    align-items: stretch;
}

/* ── LEFT PANEL — Loại cửa + Thông số + Accordion (cuộn được) ── */
.sd-panel-left {
    background: #fff;
    border-radius: 16px;
    border: 1px solid #eee;
    overflow-y: auto;
    overflow-x: hidden;
    position: static;
    scrollbar-width: thin;
    scrollbar-color: rgba(0,0,0,0.1) transparent;
}
.sd-panel-left::-webkit-scrollbar { width: 4px; }
.sd-panel-left::-webkit-scrollbar-track { background: transparent; }
.sd-panel-left::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.12); border-radius: 2px; }
.sd-panel-section {
    padding: 18px 16px;
    border-bottom: 1px solid #f0f0f0;
}
.sd-panel-section:last-child { border-bottom: none; }
.sd-panel-section-title {
    font-size: var(--font-body);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.sd-panel-section-title svg {
    width: 16px;
    height: 16px;
    color: var(--color-main);
    flex-shrink: 0;
}

/* Params inputs */
.sd-param-row {
    margin-bottom: 12px;
}
.sd-param-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-subtext);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}
.sd-param-input {
    width: 100%;
    padding: 9px 12px;
    border: 1.5px solid #e0e0e0;
    border-radius: 8px;
    font-size: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg2);
    outline: none;
    transition: border-color 0.2s;
    box-sizing: border-box;
}
.sd-param-input:focus { border-color: var(--color-main); background: #fff; }
.sd-param-hint {
    font-size: 11px;
    color: var(--color-subtext);
    margin-top: 4px;
}
.sd-find-btn {
    width: 100%;
    padding: 10px;
    background: var(--color-main);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: var(--font-body);
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;
    margin-top: 4px;
}
.sd-find-btn:hover { opacity: 0.9; transform: translateY(-1px); }
.sd-find-btn:active { transform: translateY(0); }

/* Accordion */
.sd-accordion-item {
    border-bottom: 1px solid #f0f0f0;
}
.sd-accordion-item:last-child { border-bottom: none; }
.sd-accordion-header {
    width: 100%;
    padding: 13px 16px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    transition: background 0.2s;
}
.sd-accordion-header:hover { background: var(--color-bg2); }
.sd-accordion-header.open { background: rgba(255,157,0,0.04); }
.sd-acc-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}
.sd-acc-name {
    font-size: var(--font-body);
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sd-acc-badge {
    background: var(--color-main);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    border-radius: 10px;
    padding: 1px 7px;
    flex-shrink: 0;
}
.sd-acc-arrow {
    font-size: 10px;
    color: var(--color-subtext);
    transition: transform 0.25s;
    flex-shrink: 0;
}
.sd-accordion-header.open .sd-acc-arrow { transform: rotate(180deg); }
.sd-accordion-body {
    display: none;
    padding: 0 12px 14px;
}
.sd-accordion-body.open { display: block; }

/* Product cards inside accordion */
.sd-products-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}
.sd-product-card {
    background: var(--color-bg2);
    border: 2px solid #e8e8e8;
    border-radius: 10px;
    padding: 8px;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    position: relative;
    overflow: hidden;
}
.sd-product-card:hover {
    border-color: var(--color-main);
    box-shadow: 0 2px 10px rgba(255,157,0,0.15);
}
.sd-product-card.selected {
    border-color: var(--color-main);
    background: rgba(255,157,0,0.06);
}
.sd-product-card.selected::after {
    content: '✓';
    position: absolute;
    top: 5px;
    right: 6px;
    width: 18px;
    height: 18px;
    background: var(--color-main);
    color: #fff;
    border-radius: 50%;
    font-size: 10px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 18px;
    text-align: center;
}
.sd-product-card.recommended::before {
    content: 'Phù hợp';
    position: absolute;
    top: 4px;
    left: 4px;
    background: #22c55e;
    color: #fff;
    font-size: 9px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    z-index: 1;
}
.sd-product-card.incompatible {
    opacity: 0.45;
}
.sd-product-img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: contain;
    background: #fff;
    padding: 6px;
    border-radius: 6px;
    display: block;
    margin-bottom: 6px;
    box-sizing: border-box;
}
.sd-product-name {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.3;
    margin-bottom: 2px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.sd-product-meta {
    font-size: 10px;
    color: var(--color-subtext);
    line-height: 1.3;
}
.sd-product-brand {
    display: inline-block;
    background: #f0f0f0;
    border-radius: 3px;
    padding: 1px 5px;
    font-size: 10px;
    font-weight: 700;
    color: var(--color-text);
    margin-top: 3px;
}

/* ── CENTER PANEL: DOOR PREVIEW (luôn ở giữa, không gian rộng nhất) ── */
.sd-panel-center {
    flex: 1;
    min-height: 0;
    border-radius: 16px;
    border: 1px solid rgba(0,0,0,0.08);
    background:
        linear-gradient(180deg,
            #f2ede8 0%,
            #e9e3db 55%,
            #ddd6cc 74%,
            #c8c0b4 75%,
            #d0c8bc 100%
        );
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.7), 0 2px 16px rgba(0,0,0,0.06);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    position: relative;
    /* overflow: hidden; */
    padding: 58px 24px 0;
}

/* Toolbar nổi trên preview */
.sd-canvas-toolbar {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 32px);
    max-width: 420px;
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.95);
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    padding: 8px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 5;
}
.sd-canvas-toolbar-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0.3px;
}
.sd-canvas-size-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-main);
    background: rgba(255,157,0,0.12);
    border: 1px solid rgba(255,157,0,0.3);
    border-radius: 5px;
    padding: 2px 8px;
    display: none;
}
.sd-canvas-size-label.visible { display: inline-block; }
.sd-canvas-controls {
    display: flex;
    gap: 6px;
}
.sd-ctrl-btn {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    border: 1.5px solid rgba(0,0,0,0.12);
    background: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: var(--color-text);
    transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.sd-ctrl-btn:hover {
    border-color: var(--color-main);
    color: var(--color-main);
    background: rgba(255,157,0,0.06);
}

/* Scene wrapper: cửa + sàn */
.sd-preview-scene {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    justify-content: flex-end;
    padding-bottom: 0;
    width: 100%;
}

/* Door canvas */
.sd-door-canvas-wrap {
    position: relative;
    width: 100%;
    max-width: 260px;
    aspect-ratio: 9 / 21;
    filter: drop-shadow(0 16px 40px rgba(0,0,0,0.22)) drop-shadow(0 2px 6px rgba(0,0,0,0.12));
}
.sd-door-canvas {
    position: absolute !important;
    inset: 0 !important;
    width: 100% !important;
    height: 100% !important;
    border-radius: 4px 4px 0 0;
    overflow: visible;
    transition: transform 0.3s;
    transform-origin: top center;
    background-size: 100% 100%;
    background-position: center center;
    background-repeat: no-repeat;
}

/* Sàn nhà dưới cửa */
.sd-preview-floor {
    width: 300px;
    height: 18px;
    background: linear-gradient(180deg, #a89880 0%, #8c7a66 100%);
    border-radius: 0 0 6px 6px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
    flex-shrink: 0;
    transition: width 0.45s cubic-bezier(0.25, 1, 0.5, 1);
}
/* Vạch baseboard (thanh tường) */
.sd-panel-center::before {
    content: '';
    position: absolute;
    bottom: 18px;
    left: 0;
    right: 0;
    height: 1px;
    background: rgba(0,0,0,0.1);
    pointer-events: none;
}

/* Hinge qty control */
.sd-hinge-qty {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 4px 12px;
    border-bottom: 1px solid #f0f0f0;
    margin-bottom: 10px;
}
.sd-hinge-qty-label {
    font-size: 12px;
    color: var(--color-text);
    font-weight: 500;
    white-space: nowrap;
}
.sd-hinge-qty-ctrl {
    display: flex;
    align-items: center;
    background: var(--color-bg2, #f5f5f5);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #e0e0e0;
}
.sd-qty-btn {
    width: 30px;
    height: 30px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
    line-height: 1;
}
.sd-qty-btn:hover  { background: rgba(0,0,0,0.07); }
.sd-qty-btn:active { background: rgba(0,0,0,0.13); }
.sd-qty-val {
    min-width: 32px;
    text-align: center;
    font-size: 15px;
    font-weight: 700;
    color: var(--color-main, #e87722);
    border-left: 1px solid #e0e0e0;
    border-right: 1px solid #e0e0e0;
    line-height: 30px;
}

/* Overlay items */
.sd-accessory-overlay {
    position: absolute;
    transform: translate(-50%, -50%);
    z-index: 10;
    cursor: pointer;
    transition: filter 0.2s;
    max-width: 300px;
}
.sd-accessory-overlay:hover { filter: drop-shadow(0 0 6px rgba(255,157,0,0.7)); }
.sd-accessory-overlay img {
    width: 100%;
    height: auto;
    display: block;
}
/* Remove button */
.sd-overlay-remove {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 20px;
    height: 20px;
    background: #ef4444;
    color: #fff;
    border: 2px solid #fff;
    border-radius: 50%;
    font-size: 11px;
    line-height: 1;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    z-index: 20;
}
.sd-accessory-overlay:hover .sd-overlay-remove { display: flex; }
/* Tooltip */
.sd-overlay-tooltip {
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.85);
    color: #fff;
    font-size: 11px;
    white-space: nowrap;
    padding: 4px 8px;
    border-radius: 5px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 30;
}
.sd-overlay-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: rgba(0,0,0,0.85);
}
.sd-accessory-overlay:hover .sd-overlay-tooltip { opacity: 1; }

/* Empty canvas hint */
.sd-canvas-hint {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 5;
    gap: 8px;
}
.sd-canvas-hint-icon {
    font-size: 28px;
    opacity: 0.3;
}
.sd-canvas-hint-text {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    text-align: center;
    line-height: 1.5;
    font-weight: 500;
}
.sd-canvas-hint.hidden { display: none; }

/* ── RIGHT PANEL — Thiết kế của bạn (cột phải, cuộn được) ── */
.sd-panel-right {
    background: #fff;
    border-radius: 16px;
    border: 1px solid #eee;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: static;
    height: 100%;
}

/* Header: title + meta info */
.sd-summary-header {
    padding: 14px 18px 12px;
    border-bottom: 1px solid #f0f0f0;
    flex-shrink: 0;
}
.sd-summary-title {
    font-size: var(--font-small);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
}
.sd-summary-meta {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.sd-summary-meta-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
}
.sd-summary-meta-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-subtext);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    white-space: nowrap;
}
.sd-summary-meta-value {
    font-size: 13px;
    color: var(--color-text);
    font-weight: 500;
}

/* Body: accessories list (scrollable) */
.sd-summary-body {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    padding: 12px 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    scrollbar-width: thin;
    scrollbar-color: rgba(0,0,0,0.1) transparent;
}
.sd-summary-body::-webkit-scrollbar { width: 4px; }
.sd-summary-body::-webkit-scrollbar-track { background: transparent; }
.sd-summary-body::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.1); border-radius: 2px; }

.sd-summary-divider {
    height: 1px;
    background: #f0f0f0;
    flex-shrink: 0;
    margin: 0 -18px;
    display: none; /* ẩn — dùng border trong header */
}
.sd-summary-accessories-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-subtext);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}
.sd-summary-list {
    display: flex;
    flex-direction: column;
    gap: 7px;
    min-height: 36px;
}

/* Footer: action buttons (always visible) */
.sd-summary-footer {
    flex-shrink: 0;
    padding: 12px 18px;
    border-top: 1px solid #f0f0f0;
    background: #fafafa;
    border-radius: 0 0 16px 16px;
}
.sd-summary-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    background: var(--color-bg2);
    border-radius: 8px;
    border: 1px solid #eee;
    animation: sdFadeIn 0.2s ease;
}
.sd-summary-item-img {
    width: 36px;
    height: 36px;
    object-fit: cover;
    border-radius: 5px;
    flex-shrink: 0;
}
.sd-summary-item-info { min-width: 0; flex: 1; }
.sd-summary-item-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-subtext);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.sd-summary-item-name {
    font-size: 12px;
    color: var(--color-text);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.sd-summary-item-remove {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-subtext);
    font-size: 14px;
    padding: 0 4px;
    flex-shrink: 0;
    transition: color 0.2s;
    line-height: 1;
}
.sd-summary-item-remove:hover { color: #ef4444; }
.sd-summary-empty-msg {
    font-size: 13px;
    color: var(--color-subtext);
    text-align: center;
    padding: 12px 0;
    font-style: italic;
}
.sd-summary-count {
    font-size: 12px;
    color: var(--color-subtext);
    text-align: right;
}
.sd-summary-count strong {
    color: var(--color-main);
    font-weight: 700;
}

/* Action buttons */
.sd-action-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.sd-btn-primary {
    width: 100%;
    padding: 12px;
    background: var(--color-main);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: var(--font-body);
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.15s;
    letter-spacing: 0.3px;
}
.sd-btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.sd-btn-secondary {
    width: 100%;
    padding: 11px;
    background: transparent;
    color: var(--color-text);
    border: 1.5px solid #ddd;
    border-radius: 10px;
    font-size: var(--font-body);
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
}
.sd-btn-secondary:hover {
    border-color: var(--color-main);
    color: var(--color-main);
}
.sd-history-link {
    display: block;
    text-align: center;
    font-size: 12px;
    color: var(--color-subtext);
    text-decoration: none;
    transition: color 0.2s;
}
.sd-history-link:hover { color: var(--color-main); text-decoration: underline; }

/* ── HISTORY PAGE ── */
.sd-history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
}
.sd-history-header h2 {
    font-size: var(--font-medium);
    font-weight: 700;
    color: var(--color-text);
}
.sd-history-grid {
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.sd-history-card {
    background: #fff;
    border: 1px solid #eee;
    border-radius: 14px;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: box-shadow 0.2s;
}
.sd-history-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
.sd-history-thumb {
    width: 64px;
    height: 88px;
    border-radius: 6px 6px 0 0;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}
.sd-history-thumb-door {
    width: 100%;
    height: 100%;
    border-radius: 4px 4px 0 0;
    border: 4px solid rgba(0,0,0,0.2);
    box-sizing: border-box;
}
.sd-history-floor {
    height: 6px;
    background: rgba(0,0,0,0.35);
    border-radius: 0 0 3px 3px;
}
.sd-history-info {
    flex: 1;
    min-width: 0;
}
.sd-history-info h3 {
    font-size: var(--font-small);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 4px;
}
.sd-history-meta {
    font-size: 12px;
    color: var(--color-subtext);
    margin-bottom: 8px;
}
.sd-history-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.sd-history-tag {
    background: var(--color-bg2);
    border: 1px solid #e8e8e8;
    border-radius: 6px;
    padding: 3px 9px;
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text);
}
.sd-history-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
}
.sd-btn-open {
    padding: 9px 18px;
    background: var(--color-main);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: opacity 0.2s;
}
.sd-btn-open:hover { opacity: 0.88; }
.sd-btn-delete {
    padding: 8px 18px;
    background: transparent;
    color: #ef4444;
    border: 1.5px solid #fca5a5;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}
.sd-btn-delete:hover { background: #fef2f2; }
.sd-history-empty {
    text-align: center;
    padding: 80px 20px;
    color: var(--color-subtext);
}
.sd-history-empty-icon {
    font-size: 48px;
    margin-bottom: 14px;
    opacity: 0.4;
}
.sd-history-empty h3 {
    font-size: var(--font-small);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}
.sd-history-empty p {
    font-size: var(--font-body);
    margin-bottom: 20px;
}

/* ── TOAST ── */
.sd-toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: #1e293b;
    color: #fff;
    padding: 13px 22px;
    border-radius: 10px;
    font-size: var(--font-body);
    font-weight: 500;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 9999;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.sd-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}
.sd-toast.success { background: #16a34a; }
.sd-toast.error   { background: #dc2626; }

/* ── SEND MODAL ── */
.sd-modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s;
}
.sd-modal-backdrop.open {
    opacity: 1;
    pointer-events: auto;
}
.sd-modal {
    background: #fff;
    border-radius: 16px;
    padding: 32px;
    max-width: 420px;
    width: 90%;
    text-align: center;
    transform: translateY(20px);
    transition: transform 0.25s;
}
.sd-modal-backdrop.open .sd-modal { transform: translateY(0); }
/* Modal states */
.sd-modal-state               { display: none; }
.sd-modal[data-state="form"]     .sd-modal-state[data-show="form"],
.sd-modal[data-state="loading"]  .sd-modal-state[data-show="loading"],
.sd-modal[data-state="success"]  .sd-modal-state[data-show="success"],
.sd-modal[data-state="error"]    .sd-modal-state[data-show="error"] { display: block; }

.sd-modal-title {
    font-size: var(--font-small);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}
.sd-modal-desc {
    font-size: 13px;
    color: var(--color-subtext);
    margin-bottom: 18px;
    line-height: 1.5;
}

/* Form fields */
.sd-modal-field { margin-bottom: 14px; }
.sd-modal-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 5px;
}
.sd-required { color: #e53e3e; }
.sd-modal-input {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 13px;
    color: var(--color-text);
    background: #fafafa;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    font-family: inherit;
}
.sd-modal-input:focus {
    outline: none;
    border-color: var(--color-main);
    box-shadow: 0 0 0 3px rgba(232,119,34,0.12);
    background: #fff;
}
.sd-modal-textarea { resize: vertical; min-height: 60px; }
.sd-modal-err-inline {
    font-size: 12px;
    color: #e53e3e;
    margin-bottom: 10px;
    min-height: 16px;
}

/* Actions */
.sd-modal-actions {
    display: flex;
    gap: 10px;
    margin-top: 18px;
}
.sd-modal-btn-cancel {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-subtext);
    cursor: pointer;
    transition: background 0.15s;
}
.sd-modal-btn-cancel:hover { background: #f5f5f5; }
.sd-modal-btn-submit {
    flex: 2;
    padding: 10px;
    background: var(--color-main);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.15s;
}
.sd-modal-btn-submit:disabled { opacity: 0.55; cursor: not-allowed; }
.sd-modal-btn-submit:not(:disabled):hover { opacity: 0.88; }

/* Loading */
.sd-modal-state[data-show="loading"] { text-align: center; padding: 20px 0; }
.sd-modal-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f0f0f0;
    border-top-color: var(--color-main);
    border-radius: 50%;
    animation: sdSpin 0.75s linear infinite;
    margin: 0 auto 16px;
}
@keyframes sdSpin { to { transform: rotate(360deg); } }
.sd-modal-loading-text { font-size: 14px; color: var(--color-subtext); }

/* Result states */
.sd-modal-state[data-show="success"],
.sd-modal-state[data-show="error"] { text-align: center; }
.sd-modal-result-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    font-size: 22px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}
.sd-result-ok  { background: #e6f9f0; color: #1a9e5e; }
.sd-result-err { background: #fff0f0; color: #e53e3e; }
.sd-modal-ref {
    display: inline-block;
    font-size: 11px;
    color: var(--color-subtext);
    background: #f5f5f5;
    padding: 4px 10px;
    border-radius: 6px;
    margin-bottom: 18px;
    font-family: monospace;
    letter-spacing: 1px;
}

/* ── ANIMATIONS ── */
@keyframes sdFadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── RESPONSIVE ── */
@media (max-width: 1200px) {
    .sd-configurator {
        grid-template-columns: 248px 1fr 248px;
        gap: 14px;
    }
}
@media (max-width: 1024px) {
    .sd-configurator {
        grid-template-columns: 230px 1fr 230px;
        gap: 12px;
        height: calc(100vh - 240px);
    }
}
@media (max-width: 860px) {
    .sd-configurator {
        grid-template-columns: 1fr;
        height: auto;
        min-height: unset;
        gap: 16px;
    }
    .sd-panel-center {
        min-height: 460px;
    }
    .sd-panel-left,
    .sd-panel-right {
        overflow-y: visible;
        height: auto;
    }
    .sd-summary-body {
        overflow-y: visible;
    }
}
@media (max-width: 640px) {
    .sd-page { padding: 20px 14px 60px; }
    .sd-step1-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .sd-step-dot .label { display: none; }
    .sd-door-canvas-wrap { max-width: 200px; }
    .sd-history-card { flex-wrap: wrap; }
    .sd-history-actions { flex-direction: row; width: 100%; }
    .sd-btn-open, .sd-btn-delete { flex: 1; }
}

/* ══════════════════════════════════════════════
   STEP 0 — FURNITURE TYPE SELECTION
══════════════════════════════════════════════ */
.sd-furniture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 8px;
}
.sd-furniture-card {
    background: #fff;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.07);
    border: 1.5px solid #eee;
    transition: transform 0.2s, box-shadow 0.2s;
}
.sd-furniture-card:not(.unavailable) {
    cursor: pointer;
}
.sd-furniture-card:not(.unavailable):hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 28px rgba(0,0,0,0.13);
    border-color: transparent;
}
.sd-furniture-card.unavailable {
    opacity: 0.55;
}
.sd-furniture-card-visual {
    position: relative;
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.sd-furniture-badge-soon {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(0,0,0,0.38);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    padding: 3px 9px;
    border-radius: 20px;
    letter-spacing: 0.6px;
    text-transform: uppercase;
}
.sd-furniture-card-body {
    padding: 18px;
}
.sd-furniture-card-body h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 6px;
}
.sd-furniture-card-body p {
    font-size: 12px;
    color: var(--color-subtext);
    line-height: 1.6;
    margin: 0 0 14px;
    min-height: 38px;
}
.sd-furniture-card-btn {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    color: var(--color-main);
    text-decoration: none;
    padding: 6px 14px;
    border: 1.5px solid var(--color-main);
    border-radius: 8px;
    transition: background 0.2s, color 0.2s;
}
.sd-furniture-card-btn:hover {
    background: var(--color-main);
    color: #fff;
}
.sd-furniture-card-btn-disabled {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-subtext);
    padding: 6px 14px;
    border: 1.5px solid #ddd;
    border-radius: 8px;
}

/* Furniture icons — CSS silhouettes */
.sd-furniture-icon {
    position: relative;
    opacity: 0.85;
}
.sd-furniture-icon-door {
    width: 58px;
    height: 88px;
    background: rgba(255,255,255,0.16);
    border-radius: 4px 4px 0 0;
    border: 2px solid rgba(255,255,255,0.45);
}
.sd-furniture-icon-door::after {
    content: '';
    position: absolute;
    right: 9px;
    top: 50%;
    transform: translateY(-50%);
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: rgba(255,255,255,0.75);
    box-shadow: 0 0 0 3px rgba(255,255,255,0.25);
}
.sd-furniture-icon-cabinet {
    width: 78px;
    height: 68px;
    background: rgba(255,255,255,0.16);
    border-radius: 5px;
    border: 2px solid rgba(255,255,255,0.45);
}
.sd-furniture-icon-cabinet::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 2px;
    bottom: 2px;
    width: 2px;
    background: rgba(255,255,255,0.45);
    transform: translateX(-50%);
}
.sd-furniture-icon-cabinet::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 2px;
    height: 2px;
    background: rgba(255,255,255,0.85);
    box-shadow: -18px 0 0 rgba(255,255,255,0.85), 18px 0 0 rgba(255,255,255,0.85);
}
.sd-furniture-icon-wardrobe {
    width: 82px;
    height: 80px;
    background: rgba(255,255,255,0.16);
    border-radius: 5px;
    border: 2px solid rgba(255,255,255,0.45);
}
.sd-furniture-icon-wardrobe::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 2px;
    bottom: 2px;
    width: 2px;
    background: rgba(255,255,255,0.45);
    transform: translateX(-50%);
}
.sd-furniture-icon-wardrobe::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 2px;
    height: 2px;
    background: rgba(255,255,255,0.85);
    box-shadow: -20px 0 0 rgba(255,255,255,0.85), 20px 0 0 rgba(255,255,255,0.85);
}
.sd-furniture-icon-window {
    width: 68px;
    height: 68px;
    background: rgba(255,255,255,0.16);
    border-radius: 5px;
    border: 2px solid rgba(255,255,255,0.45);
}
.sd-furniture-icon-window::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 2px;
    bottom: 2px;
    width: 2px;
    background: rgba(255,255,255,0.45);
    transform: translateX(-50%);
}
.sd-furniture-icon-window::after {
    content: '';
    position: absolute;
    left: 2px;
    right: 2px;
    top: 50%;
    height: 2px;
    background: rgba(255,255,255,0.45);
    transform: translateY(-50%);
}

/* ── BACK TO TYPES BREADCRUMB ── */
.sd-page-header {
    margin-bottom: 16px;
}
.sd-page-header .sd-page-title {
    margin-bottom: 0;
    margin-top: 4px;
}
.sd-back-to-types {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--color-subtext);
    text-decoration: none;
    transition: color 0.2s;
}
.sd-back-to-types:hover {
    color: var(--color-main);
}

@media (max-width: 640px) {
    .sd-furniture-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .sd-furniture-card-visual { height: 130px; }
}

/* ── MODEL SELECT (step 2 dropdown) ── */
.sd-model-section {
    margin-bottom: 0;
}
.sd-model-select {
    width: 100%;
    padding: 8px 32px 8px 10px;
    border: 1.5px solid var(--color-border, #e0d6cc);
    border-radius: 8px;
    font-size: var(--font-body, 14px);
    font-family: inherit;
    color: var(--color-text, #2c1a0e);
    background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%238B6914' stroke-width='1.8' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat right 10px center;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    margin-top: 6px;
}
.sd-model-select:focus {
    outline: none;
    border-color: var(--color-main, #8B6914);
    box-shadow: 0 0 0 3px rgba(139, 105, 20, 0.12);
}

/* ── ACCORDION PLACEHOLDER ── */
.sd-accordion-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 32px 16px;
    text-align: center;
    color: var(--color-subtext, #9e8a7a);
    font-size: 13px;
}
.sd-acc-placeholder-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-bg-soft, #f5f0ea);
    border: 2px dashed var(--color-border, #e0d6cc);
    flex-shrink: 0;
}

/* ── THOÁT HIỂM: PANIC BAR VISUAL ── */
.sd-door-panic-bar {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 62%;
    height: 9%;
    background: rgba(255,255,255,0.55);
    border-radius: 4px;
    border: 1.5px solid rgba(255,255,255,0.8);
}