/* ===== 全局样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --success: #10b981;
    --success-hover: #059669;
    --bg: #f8fafc;
    --panel-bg: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-light: #64748b;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

/* ===== 布局 ===== */
.app-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
}

.app-header {
    text-align: center;
    padding: 20px 0 30px;
}

.app-header h1 {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-light);
    margin-top: 5px;
    font-size: 0.95rem;
}

.main-content {
    display: grid;
    grid-template-columns: 420px 1fr;
    gap: 20px;
    align-items: start;
}

/* ===== 左侧面板 ===== */
.left-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    padding-right: 8px;
}

.left-panel::-webkit-scrollbar {
    width: 6px;
}

.left-panel::-webkit-scrollbar-track {
    background: transparent;
}

.left-panel::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.panel-section {
    background: var(--panel-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.panel-section h2 {
    font-size: 1.05rem;
    margin-bottom: 12px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ===== 数据输入 ===== */
.input-format-hint {
    background: #f1f5f9;
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 12px;
    font-size: 0.82rem;
    color: var(--text-light);
}

.input-format-hint pre {
    margin-top: 6px;
    font-family: 'Fira Code', monospace;
    font-size: 0.78rem;
    color: var(--primary);
    white-space: pre-wrap;
}

#dataInput {
    width: 100%;
    height: 180px;
    border: 2px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.85rem;
    resize: vertical;
    transition: border-color 0.2s;
    line-height: 1.5;
}

#dataInput:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* ===== 按钮 ===== */
.btn-group {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: #f1f5f9;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: #e2e8f0;
}

.btn-success {
    background: var(--success);
    color: white;
    flex: 1;
}

.btn-success:hover {
    background: var(--success-hover);
    transform: translateY(-1px);
}

/* ===== 配置区 ===== */
.config-group {
    margin-bottom: 12px;
}

.config-group > label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-light);
    margin-bottom: 5px;
}

.config-group select,
.config-group input[type="text"],
.config-group input[type="number"] {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.88rem;
    background: white;
    transition: border-color 0.2s;
}

.config-group select:focus,
.config-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.83rem;
    color: var(--text);
    cursor: pointer;
    background: #f8fafc;
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    transition: all 0.2s;
}

.checkbox-group label:hover {
    background: #f1f5f9;
    border-color: var(--primary);
}

.checkbox-group input[type="checkbox"] {
    accent-color: var(--primary);
}

/* ===== 系列配置 ===== */
.series-config {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.series-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: #f8fafc;
    border-radius: 8px;
    border: 1px solid var(--border);
    cursor: grab;
    transition: all 0.2s;
}

.series-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.series-item.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.series-item .drag-handle {
    color: #94a3b8;
    cursor: grab;
    font-size: 1.1rem;
}

.series-item .series-name {
    flex: 1;
    font-size: 0.85rem;
    font-weight: 500;
}

.series-item input[type="color"] {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    padding: 0;
}

.series-item select {
    padding: 4px 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.8rem;
    background: white;
}

.hint-text {
    font-size: 0.83rem;
    color: var(--text-light);
    text-align: center;
    padding: 10px;
}

/* ===== 右侧图表区 ===== */
.right-panel {
    position: sticky;
    top: 20px;
}

.chart-container {
    background: var(--panel-bg);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.chart-area {
    width: 100%;
    height: 600px;
}

.placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

.placeholder p:first-child {
    font-size: 4rem;
    margin-bottom: 16px;
}

.placeholder p:last-child {
    font-size: 1.1rem;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .left-panel {
        max-height: none;
    }
    
    .chart-area {
        height: 450px;
    }
}

/* ===== 动画 ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.panel-section {
    animation: fadeIn 0.3s ease-out;
}