:root {
    --bg: #05050d;
    --panel: rgba(18, 18, 34, 0.9);
    --glass: rgba(255, 255, 255, 0.07);
    --text: #f7f2ff;
    --muted: #aaa3c4;
    --purple: #9d4dff;
    --pink: #ff4fd8;
    --blue: #37d5ff;
    --border: rgba(255, 255, 255, 0.15);
    --shadow: 0 0 35px rgba(157, 77, 255, 0.28);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    padding: 2rem 1rem;
}

.app-container {
    max-width: 1000px;
    margin: 0 auto;
}

.section-label {
    color: var(--blue);
    text-transform: uppercase;
    letter-spacing: 3px;
    font-size: 0.75rem;
    font-weight: 700;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-shadow: 0 0 20px rgba(55, 213, 255, 0.4);
}

/* Filters */
.filter-container {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.pill {
    background: var(--glass);
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.pill.active, .pill:hover {
    background: rgba(157, 77, 255, 0.2);
    color: var(--text);
    border-color: var(--purple);
    box-shadow: var(--shadow);
}

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(15px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transition: transform 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
    border-color: var(--blue);
    box-shadow: 0 0 20px rgba(55, 213, 255, 0.2);
}

.metric-title {
    color: var(--muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--blue), var(--pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Charts Layout */
.charts-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .charts-layout { grid-template-columns: 1fr; }
}

.chart-panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(15px);
}

.chart-panel h3 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text);
}

/* Custom CSS Bar Chart */
.bar-chart-container {
    height: 250px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}

.chart-bar {
    flex: 1;
    background: linear-gradient(180deg, var(--purple) 0%, rgba(157, 77, 255, 0.1) 100%);
    border-radius: 6px 6px 0 0;
    border-top: 2px solid var(--pink);
    transition: height 0.5s cubic-bezier(0.16, 1, 0.3, 1), filter 0.3s;
    position: relative;
}

.chart-bar:hover {
    filter: brightness(1.5);
    box-shadow: 0 -10px 20px rgba(255, 79, 216, 0.4);
}

/* Custom CSS Donut Chart */
.donut-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.donut-chart {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    /* Gradient updated dynamically by JS */
    background: conic-gradient(var(--purple) 0% 40%, var(--pink) 40% 75%, var(--blue) 75% 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow);
    transition: background 0.5s ease;
}

.donut-hole {
    width: 130px;
    height: 130px;
    background: var(--bg);
    border-radius: 50%;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.8);
}

/* Legend */
.legend {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.legend-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--muted);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    margin-right: 10px;
    display: inline-block;
}

.legend-label { display: flex; align-items: center; }
.legend-val { color: var(--text); font-weight: 700; }