:root {
        /* 기본 색상 */
        --primary-color: #4a7dff;
        --bg-color: #f4f6f8;
        --card-bg: #ffffff;
        --text-color: #333;
        --text-muted: #666;
        --border-color: #ddd;

        /* 상태 색상 */
        --danger-color: #ff4d4f;
        --success-color: #00c853;
        --warning-color: #f59e0b;

        /* 가구 타입별 색상 */
        --upper-color: #5b8def;
        --lower-color: #f59e0b;
        --tall-color: #10b981;
        --fridge-color: #0ea5e9;
        --wardrobe-color: #10b981;
        --homecafe-color: #8b5cf6;
        --sink-color: #3b82f6;

        /* 레이아웃 */
        --border-radius: 12px;
        --border-radius-sm: 6px;
        --border-radius-xs: 4px;

        /* 간격 */
        --gap-xs: 4px;
        --gap-sm: 8px;
        --gap-md: 12px;
        --gap-lg: 16px;
        --gap-xl: 24px;

        /* 폰트 크기 */
        --font-xs: 9px;
        --font-sm: 11px;
        --font-md: 13px;
        --font-lg: 15px;

        /* 그림자 */
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
        --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
        --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
      }
      * {
        box-sizing: border-box;
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      }
      body {
        margin: 0;
        padding: 20px;
        background: var(--bg-color);
        color: var(--text-color);
      }
      .app-container {
        max-width: 1100px;
        margin: 0 auto;
        background: var(--card-bg);
        border-radius: var(--border-radius);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        padding: 30px;
        min-height: 80vh;
      }
      h1 {
        text-align: center;
        font-size: 24px;
        margin-bottom: 10px;
      }
      .subtitle {
        text-align: center;
        color: #666;
        font-size: 14px;
        margin-bottom: 30px;
      }
      .stepper-indicator {
        display: flex;
        justify-content: center;
        gap: 10px;
        margin-bottom: 30px;
      }
      .step-dot {
        width: 30px;
        height: 30px;
        border-radius: 50%;
        background: #eee;
        color: #999;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        font-weight: bold;
      }
      .step-dot.active {
        background: var(--primary-color);
        color: white;
      }
      .section-label {
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 8px;
      }
      .badge {
        background: #eef2ff;
        color: var(--primary-color);
        padding: 4px 10px;
        border-radius: 12px;
        font-size: 11px;
      }
      label {
        font-size: 11px;
        font-weight: 600;
        color: #666;
        margin-bottom: 4px;
        display: block;
      }
      input[type='number'],
      input[type='text'],
      select {
        padding: 8px;
        border: 1px solid #ddd;
        border-radius: 6px;
        width: 100%;
        font-size: 13px;
        outline: none;
      }
      input:focus,
      select:focus {
        border-color: var(--primary-color);
      }
      .btn-next {
        background: var(--primary-color);
        color: white;
        border: none;
        padding: 12px 30px;
        border-radius: 999px;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
      }
      .btn-next:disabled {
        background: #ccc;
        cursor: not-allowed;
      }
      .btn-back {
        background: white;
        border: 1px solid #ddd;
        padding: 6px 12px;
        border-radius: 6px;
        cursor: pointer;
        font-size: 12px;
      }
      .category-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 12px;
        margin-bottom: 30px;
      }
      .category-card {
        background: #fafafa;
        border: 2px solid transparent;
        border-radius: var(--border-radius);
        height: 100px;
        position: relative;
        overflow: hidden;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      .category-card:hover {
        background: #fff;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
      }
      .category-card.active {
        border-color: var(--primary-color);
        background: #f4f8ff;
      }
      .category-name {
        font-size: 15px;
        font-weight: 600;
        color: #555;
        transition: transform 0.3s;
      }
      .category-card.active .category-name {
        transform: translateY(-15px);
        color: var(--primary-color);
      }
      .card-stepper {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 40px;
        background: var(--primary-color);
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 15px;
        transform: translateY(100%);
        transition: transform 0.3s;
      }
      .category-card.active .card-stepper {
        transform: translateY(0);
      }
      .stepper-btn {
        background: none;
        border: none;
        color: white;
        font-size: 20px;
        cursor: pointer;
        width: 30px;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
      }
      .stepper-count {
        color: white;
        font-weight: bold;
        font-size: 16px;
      }
      #detailInputSection {
        display: none;
        background: #f9fafb;
        padding: 24px;
        border-radius: var(--border-radius);
        border: 1px solid #eee;
        margin-top: 20px;
      }
      .ai-guide-box {
        background: #fff;
        border-left: 4px solid var(--primary-color);
        padding: 12px 16px;
        border-radius: 4px;
        margin-bottom: 20px;
        font-size: 13px;
        display: flex;
        align-items: center;
        gap: 10px;
      }
      .item-input-card {
        background: white;
        border: 1px solid #e0e0e0;
        border-radius: 8px;
        padding: 16px;
        margin-bottom: 12px;
      }
      .item-body {
        display: flex;
        gap: 12px;
      }
      .input-section {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 12px;
      }
      .input-row {
        display: flex;
        gap: 8px;
      }
      .input-group {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 4px;
      }
      .extra-settings {
        background: #f8f9fa;
        border: 1px solid #eee;
        padding: 12px;
        border-radius: 6px;
        display: flex;
        flex-direction: column;
        gap: 10px;
      }
      .extra-title {
        font-size: 12px;
        font-weight: 700;
        color: var(--primary-color);
      }
      .photo-section {
        width: 90px;
        flex-shrink: 0;
      }
      .photo-box {
        background: #f0f0f0;
        border: 1px dashed #ccc;
        border-radius: 6px;
        cursor: pointer;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        color: #888;
        font-size: 10px;
        min-height: 80px;
        position: relative;
        overflow: hidden;
      }
      .photo-box img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        position: absolute;
      }
      .file-input-hidden {
        display: none;
      }
      .btn-delete {
        background: transparent;
        color: #999;
        border: none;
        font-size: 18px;
        cursor: pointer;
      }
      #step2-content {
        display: none;
      }
      #step3-content {
        display: none;
      }
      .bookmark-tabs {
        display: flex;
        gap: 4px;
        border-bottom: 2px solid var(--primary-color);
        padding-top: 5px;
      }
      .bookmark-tab {
        padding: 10px 20px;
        background: #eef2f6;
        color: #888;
        border-radius: 10px 10px 0 0;
        border: 1px solid #ddd;
        border-bottom: none;
        font-size: 13px;
        font-weight: 600;
        cursor: pointer;
        position: relative;
        top: 2px;
      }
      .bookmark-tab.active {
        background: #fff;
        color: var(--primary-color);
        border: 2px solid var(--primary-color);
        border-bottom: 2px solid #fff;
        z-index: 10;
      }
      .design-workspace {
        background: #fff;
        border: 2px solid var(--primary-color);
        border-top: none;
        border-radius: 0 0 12px 12px;
        padding: 20px;
        min-height: 500px;
      }
      .ws-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 20px;
        padding-bottom: 15px;
        border-bottom: 1px solid #eee;
      }
      .ws-title {
        font-size: 18px;
        font-weight: 700;
        display: flex;
        align-items: center;
        gap: 10px;
      }
      .ws-info-badge {
        font-size: 13px;
        color: #666;
        background: #f0f0f0;
        padding: 4px 8px;
        border-radius: 6px;
      }
      .ws-layout {
        display: grid;
        grid-template-columns: 320px 1fr;
        gap: 24px;
      }
      .spec-panel {
        background: #f8f9fa;
        padding: 16px;
        border-radius: 8px;
        border: 1px solid #eee;
        max-height: 700px;
        overflow-y: auto;
      }
      .spec-group-title {
        font-size: 12px;
        font-weight: 700;
        color: var(--primary-color);
        margin: 15px 0 8px;
        border-bottom: 1px solid #e0e0e0;
        padding-bottom: 4px;
      }
      .spec-group-title:first-child {
        margin-top: 0;
      }
      .spec-row {
        display: flex;
        gap: 8px;
        margin-bottom: 8px;
      }
      .spec-field {
        flex: 1;
      }
      .color-select-row {
        display: flex;
        gap: 4px;
      }
      .color-select-row select {
        width: 50%;
        font-size: 12px;
      }
      .acc-list {
        display: flex;
        flex-direction: column;
        gap: 6px;
        margin-bottom: 6px;
      }
      .acc-item {
        display: flex;
        gap: 4px;
      }
      .btn-add-acc {
        width: 100%;
        padding: 6px;
        background: #fff;
        border: 1px dashed #ccc;
        color: #666;
        border-radius: 4px;
        font-size: 11px;
        cursor: pointer;
      }
      .btn-del-acc {
        color: #ccc;
        border: 1px solid #eee;
        background: white;
        border-radius: 4px;
        width: 24px;
        cursor: pointer;
      }
      .module-panel {
        display: flex;
        flex-direction: column;
        gap: 10px;
      }
      .module-section {
        margin-bottom: 16px;
      }
      .module-section-header {
        display: flex;
        align-items: center;
        gap: 8px;
        flex-wrap: wrap;
        padding: 10px 12px;
        border-radius: 8px;
        margin-bottom: 8px;
        font-size: 13px;
        font-weight: 700;
      }
      .module-section-header.upper {
        background: linear-gradient(135deg, #e0ecff 0%, #f0f5ff 100%);
        color: var(--upper-color);
        border-left: 4px solid var(--upper-color);
      }
      .module-section-header.lower {
        background: linear-gradient(135deg, #fef3c7 0%, #fffbeb 100%);
        color: var(--lower-color);
        border-left: 4px solid var(--lower-color);
      }
      .section-title-row {
        display: flex;
        align-items: center;
        gap: 8px;
        flex: 1;
      }
      .section-info-row {
        display: flex;
        align-items: center;
        gap: 10px;
        width: 100%;
        margin-top: 6px;
        font-size: 11px;
      }
      .effective-space-group {
        display: flex;
        align-items: center;
        gap: 4px;
        background: rgba(255, 255, 255, 0.7);
        padding: 3px 8px;
        border-radius: 4px;
      }
      .effective-space-group label {
        font-size: 10px;
        color: #666;
        margin: 0;
      }
      .effective-space-input {
        width: 70px;
        padding: 3px 6px;
        font-size: 12px;
        border: 1px solid #ccc;
        border-radius: 3px;
        text-align: center;
      }
      .section-remaining {
        font-size: 11px;
        font-weight: 600;
        background: rgba(255, 255, 255, 0.7);
        padding: 3px 8px;
        border-radius: 4px;
      }
      .section-buttons {
        display: flex;
        gap: 4px;
        margin-left: auto;
      }
      .btn-section-undo,
      .btn-section-auto {
        width: 52px; height: 52px;
        padding: 0;
        border-radius: 10px;
        font-size: 22px;
        font-weight: 700;
        cursor: pointer;
        display: inline-flex; align-items: center; justify-content: center;
        line-height: 1;
      }
      .btn-section-undo {
        background: #f0f0f0;
        border: 1px solid #ccc;
        color: #666;
        padding: 6px 10px;
        border-radius: 6px;
        font-size: 12px;
        font-weight: 600;
        cursor: pointer;
      }
      .btn-section-undo:disabled {
        opacity: 0.4;
        cursor: not-allowed;
      }
      .btn-section-auto {
        background: linear-gradient(135deg, #fef3c7, #fde68a);
        border: 2px solid #f59e0b;
        color: #92400e;
        box-shadow: 0 2px 6px rgba(245,158,11,0.3);
        transition: all 0.15s ease;
      }
      .btn-section-auto:hover {
        background: linear-gradient(135deg, #fde68a, #fcd34d);
        transform: scale(1.05);
      }
      .btn-section-auto:active {
        transform: scale(0.95);
      }
      .module-list {
        display: flex;
        flex-direction: column;
        gap: 4px;
        min-height: 80px;
        padding: 8px;
        background: #fafafa;
        border-radius: 6px;
        border: 2px dashed #ddd;
      }
      .module-list.empty-list::before {
        content: '+ 버튼을 눌러 장을 추가하세요';
        color: #aaa;
        font-size: 12px;
        text-align: center;
        display: block;
        padding: 20px;
      }
      .module-card {
        background: white;
        border: 1px solid #e0e0e0;
        border-radius: 6px;
        padding: 8px 10px;
        display: flex;
        align-items: flex-start;
        gap: 8px;
        position: relative;
      }
      .module-card:hover {
        border-color: #bbb;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
      }
      .module-card.tall-type {
        border-left: 3px solid var(--tall-color);
        background: linear-gradient(90deg, #ecfdf5 0%, white 20%);
      }
      .module-card.fixed-module {
        border-left: 3px solid var(--primary-color);
        background: linear-gradient(90deg, #e8f4ff 0%, white 20%);
      }
      .module-card.fixed-module::after {
        content: '고정';
        position: absolute;
        top: 4px;
        right: 28px;
        font-size: 9px;
        color: var(--primary-color);
        background: #e8f4ff;
        padding: 1px 4px;
        border-radius: 3px;
      }
      .module-card.base-module {
        border-left: 3px solid #9333ea;
        background: linear-gradient(90deg, #f3e8ff 0%, white 20%);
      }
      .module-card.base-module::after {
        content: '기준';
        position: absolute;
        top: 4px;
        right: 28px;
        font-size: 9px;
        color: #9333ea;
        background: #f3e8ff;
        padding: 1px 4px;
        border-radius: 3px;
      }
      .essential-modules-row { display:flex; gap:6px; align-items:center; font-size:13px; margin-bottom:4px; flex-wrap:wrap; }
      .essential-label { color:#6b7280; font-weight:600; white-space:nowrap; font-size:13px; }
      .essential-toggle {
        display:inline-flex; align-items:center; gap:4px;
        padding:6px 14px; border-radius:20px; font-size:13px; font-weight:600;
        cursor:pointer; border:2px solid #d1d5db; background:#f9fafb; color:#6b7280;
        transition: all 0.2s ease; user-select:none;
      }
      .essential-toggle.active {
        border-color:#3b82f6; background:#eff6ff; color:#2563eb;
      }
      .essential-toggle:hover { border-color:#93c5fd; }
      .btn-module-settings { background:none; border:1px solid #d1d5db; border-radius:4px; cursor:pointer; font-size:12px; padding:1px 5px; margin-left:4px; }
      .btn-module-settings:hover { background:#f3f4f6; border-color:#9ca3af; }
      .sink-type-popup-overlay { position:fixed; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,0.4); z-index:10000; display:flex; align-items:center; justify-content:center; }
      .sink-type-popup { background:#fff; border-radius:12px; padding:24px; min-width:320px; max-width:400px; box-shadow:0 20px 60px rgba(0,0,0,0.3); }
      .sink-type-popup h3 { margin:0 0 16px 0; font-size:16px; color:#1f2937; }
      .sink-type-btn { display:flex; align-items:center; gap:12px; width:100%; padding:12px 16px; margin-bottom:8px; border:2px solid #e5e7eb; border-radius:8px; background:#fff; cursor:pointer; font-size:14px; transition:all 0.15s; }
      .sink-type-btn:hover { border-color:#3b82f6; background:#eff6ff; }
      .sink-type-btn.selected { border-color:#3b82f6; background:#dbeafe; }
      .sink-type-btn .type-icon { font-size:20px; }
      .sink-type-btn .type-info { text-align:left; }
      .sink-type-btn .type-name { font-weight:600; color:#1f2937; }
      .sink-type-btn .type-desc { font-size:11px; color:#6b7280; margin-top:2px; }
      .sink-type-popup-actions { display:flex; gap:8px; margin-top:16px; justify-content:flex-end; }
      .sink-type-popup-actions button { padding:8px 20px; border-radius:6px; font-size:13px; cursor:pointer; border:1px solid #d1d5db; background:#fff; }
      .sink-type-popup-actions button.primary { background:#3b82f6; color:#fff; border-color:#3b82f6; }
      .sink-type-popup-actions button.primary:hover { background:#2563eb; }
      .move-buttons {
        display: flex;
        flex-direction: column;
        gap: 2px;
      }
      .btn-move {
        width: 24px;
        height: 20px;
        border: 1px solid #ddd;
        background: #f8f8f8;
        border-radius: 4px;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 10px;
        color: #666;
      }
      .btn-move:hover:not(:disabled) {
        background: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
      }
      .btn-move:disabled {
        opacity: 0.3;
        cursor: not-allowed;
      }
      .module-icon {
        width: 32px;
        height: 32px;
        background: #f4f6f8;
        border-radius: 6px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        flex-shrink: 0;
        margin-top: 2px;
      }
      .module-info {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 2px;
      }
      .module-header {
        display: flex;
        align-items: center;
        gap: 8px;
      }
      .module-title {
        font-size: 13px;
        font-weight: 600;
      }
      .module-type-badge {
        font-size: 9px;
        padding: 2px 6px;
        border-radius: 3px;
        background: var(--tall-color);
        color: white;
      }
      .module-dims {
        display: flex;
        gap: 6px;
        margin-top: 2px;
        flex-wrap: wrap;
      }
      .dim-group {
        display: flex;
        align-items: center;
        gap: 2px;
        background: #fafafa;
        padding: 1px 4px;
        border-radius: 4px;
        border: 1px solid #eee;
      }
      .dim-label {
        font-size: 10px;
        color: #888;
        font-weight: 600;
        margin: 0;
      }
      .dim-input {
        width: 40px;
        padding: 2px 4px;
        font-size: 11px;
        border: none;
        background: transparent;
        text-align: center;
      }
      .dim-input:focus {
        outline: none;
        color: var(--primary-color);
        background: #fff;
      }
      .module-options {
        display: flex;
        gap: 8px;
        margin-top: 4px;
        flex-wrap: wrap;
      }
      .module-chk {
        display: flex;
        align-items: center;
        gap: 3px;
        font-size: 11px;
        color: #666;
        cursor: pointer;
      }
      .module-chk input {
        margin: 0;
        transform: scale(0.9);
      }
      .btn-delete-module {
        color: #ccc;
        background: none;
        border: none;
        cursor: pointer;
        font-size: 18px;
        padding: 0 4px;
        margin-left: auto;
      }
      .btn-delete-module:hover {
        color: var(--danger-color);
      }
      .module-btn-group {
        display: flex;
        gap: 6px;
        margin-top: 8px;
      }
      .btn-add-split {
        flex: 1;
        padding: 8px;
        background: #fff;
        border: 1px dashed #ccc;
        color: #666;
        border-radius: 6px;
        font-size: 12px;
        cursor: pointer;
      }
      .btn-add-split:hover {
        border-color: var(--primary-color);
        color: var(--primary-color);
        background: #f4f8ff;
      }
      .btn-add-upper {
        border-color: var(--upper-color);
        color: var(--upper-color);
      }
      .btn-add-lower {
        border-color: var(--lower-color);