:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --neutral-color: #6b7280;
    --background-bg: #f3f4f6;
    --panel-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Noto Sans SC', sans-serif;
}

body {
    background-color: var(--background-bg);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Dashboard Layout */
.dashboard-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar / Control Panel */
.control-panel {
    width: 320px;
    background-color: var(--panel-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 10;
}

.control-panel header {
    margin-bottom: 2.5rem;
}

.control-panel h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.control-panel p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.input-section {
    flex: 1;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    width: 100%;
    padding: 0.75rem 1rem;
    padding-right: 3rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

.input-wrapper .unit {
    position: absolute;
    right: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    pointer-events: none;
}

.hint-text {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.error-banner {
    background-color: #fee2e2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.error-banner.hidden {
    display: none;
}

.secondary-btn {
    width: 100%;
    padding: 0.75rem;
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.secondary-btn:hover {
    background-color: #f9fafb;
    border-color: #d1d5db;
    color: var(--text-primary);
}

.info-footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-align: center;
}

/* Main Data Display */
.data-display {
    flex: 1;
    margin-left: 320px;
    /* Width of sidebar */
    padding: 2rem;
    max-width: 1200px;
}

/* KPI Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: white;
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.kpi-card h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.kpi-card .value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.value.profit-positive {
    color: var(--success-color);
}

.value.profit-negative {
    color: var(--danger-color);
}

.value.profit-neutral {
    color: var(--neutral-color);
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.chart-card {
    background: white;
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.chart-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* Details List */
.details-card {
    background: white;
    border-radius: 1rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.details-card h3 {
    padding: 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.details-list {
    padding: 0 1.5rem;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-item .label {
    color: var(--text-secondary);
}

.detail-item .value {
    font-weight: 500;
    color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .dashboard-container {
        flex-direction: column;
    }

    .control-panel {
        width: 100%;
        position: static;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .data-display {
        margin-left: 0;
        padding: 1.5rem;
    }
}

@media (max-width: 640px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }

    .kpi-grid {
        grid-template-columns: 1fr;
    }

    .kpi-card .value {
        font-size: 1.75rem;
    }
}