/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4a6fa5;
    --secondary-color: #ff6b8b;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.title-group h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 400;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.year-selector {
    display: flex;
    align-items: center;
    gap: 12px;
}

.control-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.select-wrapper {
    position: relative;
    min-width: 120px;
}

.select-wrapper select {
    width: 100%;
    padding: 10px 36px 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    appearance: none;
    cursor: pointer;
    transition: border-color 0.2s;
}

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

.select-wrapper i {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

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

/* KPI Section */
.kpi-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.kpi-card {
    background: var(--surface-color);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.kpi-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.kpi-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.kpi-header i {
    color: var(--text-muted);
    font-size: 18px;
}

.kpi-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.kpi-trend {
    font-size: 12px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 20px;
    display: inline-block;
}

.kpi-trend.positive {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.kpi-trend.neutral {
    background: rgba(107, 114, 128, 0.1);
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

/* Cards */
.card {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.chart-controls,
.sort-controls {
    display: flex;
    gap: 8px;
}

.view-toggle {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.view-btn {
    padding: 8px 16px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

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

.sort-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

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

/* Charts */
.chart-container,
.comparison-container {
    padding: 20px 24px;
    height: 300px;
    position: relative;
}

.chart-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    background: rgba(248, 250, 252, 0.5);
}

.legend {
    display: flex;
    gap: 24px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

/* Filter Controls */
.filter-controls {
    padding: 0 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.filter-group label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.filter-tab {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    flex: 1;
    min-width: fit-content;
    text-align: center;
}

.filter-tab.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Channels List */
.channels-list {
    max-height: 400px;
    overflow-y: auto;
    padding: 0 24px 20px;
}

.channel-section {
    margin-bottom: 24px;
}

.channel-section:last-child {
    margin-bottom: 0;
}

.section-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.channel-items {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.channel-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.channel-item:hover {
    background: rgba(74, 111, 165, 0.05);
    border-color: var(--primary-color);
}

.channel-item.active {
    background: rgba(74, 111, 165, 0.1);
    border-color: var(--primary-color);
}

.channel-name {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
}

.channel-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Search Box */
.search-box {
    position: relative;
    width: 240px;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 10px 12px 10px 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Time Filter */
.time-filter {
    padding: 24px;
}

.time-slider {
    position: relative;
    padding: 8px 0;
}

.time-slider input[type="range"] {
    width: 100%;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
}

.time-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid white;
    box-shadow: var(--shadow-sm);
}

.time-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-muted);
}

#currentTime {
    color: var(--primary-color);
    font-weight: 600;
}

.time-info {
    margin-top: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

/* Footer */
.info-footer {
    display: flex;
    justify-content: center;
    gap: 32px;
    padding: 20px;
    background: var(--surface-color);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.info-item i {
    color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        padding: 16px;
    }
    
    .main-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .header-controls {
        width: 100%;
        justify-content: space-between;
    }
    
    .kpi-section {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .info-footer {
        flex-direction: column;
        gap: 16px;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .kpi-section {
        grid-template-columns: 1fr;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .chart-controls,
    .sort-controls {
        width: 100%;
    }
    
    .view-toggle {
        width: 100%;
    }
    
    .view-btn {
        flex: 1;
        justify-content: center;
    }
}