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

:root {
    --primary-color: #2563eb;
    --secondary-color: #3b82f6;
    --accent-color: #ef4444;
    --bg-color: #f8fafc;
    --panel-bg: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-family: 'Courier New', monospace;
}

.main-content {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 1.5rem;
    align-items: start;
}

/* 控制面板样式 - 紧凑版 */
.control-panel {
    background: var(--panel-bg);
    border-radius: 12px;
    padding: 1.25rem;
    box-shadow: var(--shadow-lg);
}

.control-panel h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.t-write-display {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
}

.t-write-display sub {
    font-size: 0.75rem;
}

/* 紧凑型参数控制区域 */
.compact-section {
    margin-bottom: 1rem;
}

.compact-section h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.compact-grid {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.compact-control {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.compact-control.full-width {
    width: 100%;
}

.compact-control label {
    font-size: 0.65rem;
    color: var(--text-primary);
    font-weight: 500;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.compact-control .param-label {
    flex: 1;
    color: var(--text-primary);
}

.compact-control .param-value {
    color: var(--primary-color);
    font-weight: 600;
    font-family: 'Courier New', monospace;
    min-width: 60px;
    text-align: right;
}

.compact-control input[type="range"],
.compact-control select {
    width: 100%;
}

/* 滑块样式 */
input[type="range"] {
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
    transition: background 0.3s;
}

input[type="range"]:hover {
    background: #cbd5e1;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: all 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--secondary-color);
    transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow);
    transition: all 0.2s;
}

input[type="range"]::-moz-range-thumb:hover {
    background: var(--secondary-color);
    transform: scale(1.1);
}

/* 下拉选择框样式 */
select {
    width: 100%;
    padding: 0.35rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--panel-bg);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: border-color 0.2s;
}

select:hover {
    border-color: var(--primary-color);
}

select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 重置按钮 */
.reset-button {
    width: 100%;
    padding: 0.6rem;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 0.5rem;
}

.reset-button:hover {
    background: var(--bg-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 图表容器 - 缩小尺寸 */
.chart-container {
    background: var(--panel-bg);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    min-height: 400px;
    max-height: 500px;
    position: relative;
}

/* 图表上的覆盖控制 - 移到右上角，缩小尺寸 */
.chart-overlay-controls {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 6px;
    padding: 0.5rem 0.65rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.overlay-control {
    margin-bottom: 0.4rem;
}

.overlay-control:last-child {
    margin-bottom: 0;
}

.overlay-control label {
    display: block;
    margin-bottom: 0.2rem;
}

.overlay-control .param-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
}

.overlay-control span#k-value,
.overlay-control span#eta-value {
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
}

.overlay-control input[type="range"] {
    width: 140px;
    height: 3px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .overlay-control input[type="range"] {
        width: 120px;
    }

    .chart-container {
        max-height: 450px;
    }
}

@media (max-width: 768px) {
    .chart-overlay-controls {
        position: static;
        margin-bottom: 1rem;
    }

    .chart-container {
        max-height: 400px;
    }
}

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

.compact-control {
    animation: fadeIn 0.3s ease-out;
}

.chart-overlay-controls {
    animation: fadeIn 0.4s ease-out;
}