* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6c5ce7;
    --primary-hover: #5b4cdb;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #333;
    --border-color: #e0e0e0;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
}

.container {
    max-width: 1800px;
    margin: 0 auto;
    padding: 10px 24px;
}

header {
    text-align: center;
    padding: 16px 0;
    background: linear-gradient(135deg, var(--primary-color), #a29bfe);
    color: white;
    border-radius: 12px;
    margin-bottom: 6px;
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
}

/* 页面导航 */
.page-nav {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 12px;
}

.nav-link {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.2s;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.3);
}

.nav-link.active {
    background: #fff;
    color: var(--primary-color);
    border-color: #fff;
}

header h1 {
    font-size: 1.4rem;
    margin-bottom: 2px;
}

header p {
    opacity: 0.9;
    font-size: 0.9rem;
}

.main-content {
    display: flex;
    gap: 0;
    min-height: 100vh;
}

/* 拖拽调整手柄样式 */
.resize-handle {
    width: 8px;
    cursor: col-resize;
    background: transparent;
    position: relative;
    flex-shrink: 0;
    transition: background 0.2s;
    z-index: 10;
}

.resize-handle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 40px;
    background: #ddd;
    border-radius: 2px;
    transition: background 0.2s;
}

.resize-handle:hover::before,
.resize-handle.active::before {
    background: var(--primary-color);
}

.resize-handle:hover,
.resize-handle.active {
    background: rgba(108, 92, 231, 0.1);
}

.left-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: sticky;
    top: 12px;
    flex-shrink: 0;
    width: 300px;
    align-self: flex-start;
    z-index: 1;
    overflow: visible;
}

.right-panel {
    min-width: 0;
    display: flex;
    flex-direction: column;
    padding-bottom: 0;
    max-width: 1800px;
    flex: 1;
    align-self: stretch;
    position: relative;
    z-index: 0;
}

.color-legend-card {
    flex-shrink: 0;
}

.color-legend-card .color-legend {
    max-height: 200px;
    overflow-y: auto;
}

.result-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    padding: 10px;
    margin: 0;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    position: relative;
}

.result-card .card-title {
    flex-shrink: 0;
}

.alignment-preview {
    flex: 1;
    overflow: auto;
    position: relative;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.image-container {
    position: relative;
    display: inline-block;
}

@media (max-width: 1100px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .left-panel {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .left-panel .card {
        flex: 1;
        min-width: 300px;
    }

    .color-legend-card .color-legend {
        max-height: 250px;
    }
}

@media (max-width: 600px) {
    .left-panel .card {
        min-width: 100%;
    }
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 10px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.card-title {
    font-size: 1.1rem;
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: rgba(108, 92, 231, 0.05);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background: rgba(108, 92, 231, 0.1);
}

.upload-area input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.upload-text {
    color: #666;
    font-size: 0.95rem;
}

.preview-container {
    margin-top: 20px;
    display: none;
    max-width: 1800px;
    margin-left: auto;
    margin-right: auto;
}

.preview-container.active {
    display: block;
}

.preview-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: 8px;
    display: block;
    margin: 0 auto;
}

.settings-group {
    margin-bottom: 20px;
}

.settings-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #444;
}

.settings-group select,
.settings-group input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
    background: white;
}

.settings-group select:focus,
.settings-group input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.settings-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.btn {
    width: 100%;
    padding: 14px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
}

.btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    pointer-events: auto;
}

.result-area {
    display: none;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    gap: 10px;
}

.result-area.active {
    display: flex;
}

.result-canvas-container {
    overflow: auto;
    max-height: none;
    flex: 1;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    background: #f5f5f5;
    min-height: 600px;
    max-height: 70vh;
    background-image:
        linear-gradient(45deg, #e8e8e8 25%, transparent 25%),
        linear-gradient(-45deg, #e8e8e8 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #e8e8e8 75%),
        linear-gradient(-45deg, transparent 75%, #e8e8e8 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

#resultCanvas {
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    max-width: 100%;
    height: auto;
}

/* 色号与数量统计 */
.color-summary {
    margin-top: 20px;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.color-summary-title {
    margin: 0 0 15px 0;
    font-size: 16px;
    color: #333;
}

.color-summary-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.color-summary-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    background: #f5f5f5;
    border-radius: 6px;
    min-width: 140px;
    height: 32px;
    box-sizing: border-box;
}

.color-box {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.1);
}

.color-code {
    font-weight: bold;
    color: #333;
    font-size: 14px;
}

.color-count {
    color: #666;
    font-size: 13px;
}

.color-summary .no-data {
    color: #999;
    text-align: center;
    padding: 20px;
}

.result-canvas-hidden {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.tool-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.tool-btn:hover {
    background: #f0f0f0;
}

.tool-btn.active {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

#colorPicker {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    padding: 2px;
}

/* 工具栏复选框样式 */
.tool-checkbox {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    color: #555;
    user-select: none;
}

.tool-checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.result-grid-wrapper {
    width: 100%;
    flex: 1;
    min-height: 0;
    overflow: hidden;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: #fafafa;
    display: flex;
}

.result-grid-wrapper .result-canvas-container {
    width: 100%;
    height: 100%;
    overflow: auto;
    padding: 12px;
    justify-content: center;
    align-items: flex-start;
    background: #fafafa;
}

.result-grid-wrapper.full-display .result-canvas-container {
    overflow: hidden;
}

#resultGrid {
    display: inline-block;
    transition: transform 0.1s ease-out;
}

.bead-grid-table {
    border-collapse: collapse;
    table-layout: fixed;
    --cell-size: 32px;
}

.bead-grid-table th,
.bead-grid-table td {
    border: 1px solid rgba(0, 0, 0, 0.2);
    width: var(--cell-size);
    min-width: var(--cell-size);
    height: var(--cell-size);
    padding: 2px;
    text-align: center;
    vertical-align: middle;
    font-size: calc(var(--cell-size) * 0.3);
    line-height: 1.1;
}

.bead-grid-table .grid-corner {
    background: #e0e0e0;
    width: 28px;
    min-width: 28px;
    height: var(--cell-size);
}

.bead-grid-table .grid-row-num,
.bead-grid-table .grid-col-num {
    background: #e8e8e8;
    color: #555;
    font-weight: 600;
    font-size: 9px;
}

.bead-grid-table .grid-cell {
    font-weight: 500;
    font-family: monospace;
    word-break: break-all;
}

.result-grid-wrapper.picker-mode .bead-grid-table .grid-cell {
    cursor: crosshair;
}

.result-grid-wrapper.picker-mode .bead-grid-table .grid-cell:hover {
    outline: 2px solid var(--primary-color);
    outline-offset: -2px;
}

.color-legend {
    margin-top: 20px;
    max-height: 250px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
}

.color-legend-title {
    font-weight: 600;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: white;
    z-index: 1;
}

.color-items {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
}

.color-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 6px;
    background: #f9f9f9;
    font-size: 0.85rem;
    min-width: 140px;
    height: 44px;
    box-sizing: border-box;
}

.color-swatch {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.15);
    flex-shrink: 0;
}

.color-item-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
}

.color-code {
    font-weight: 600;
    font-family: monospace;
}

.color-count {
    font-size: 0.75rem;
    color: #666;
    font-weight: 500;
}

.loading {
    display: none;
    text-align: center;
    padding: 40px;
}

.loading.active {
    display: block;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.download-btns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 15px;
}

.btn-secondary {
    background: #6c757d;
}

.btn-secondary:hover {
    background: #5a6268;
}

.stats {
    display: flex;
    gap: 20px;
    padding: 8px 12px;
    background: #f8f9fa;
    border-radius: 8px;
    font-size: 0.85rem;
    flex-wrap: wrap;
    flex-shrink: 0;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.stat-label {
    color: #666;
}

.stat-value {
    font-weight: 600;
    color: var(--primary-color);
}

.brand-info {
    padding: 12px;
    background: #f0f0f0;
    border-radius: 8px;
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: #666;
}

.bead-size-info {
    padding: 12px;
    background: #e8f5e9;
    border-radius: 8px;
    margin-top: 15px;
    font-size: 0.9rem;
    color: #2e7d32;
    text-align: center;
    font-weight: 500;
}

.error-message {
    color: #dc3545;
    padding: 10px;
    background: #f8d7da;
    border-radius: 8px;
    margin-top: 10px;
    display: none;
}

.error-message.active {
    display: block;
}