:root {
    --bg-color: #0b0f1a;
    --card-bg: #111827;
    --card-border: #1f2937;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --accent-green: #76b900;
    --accent-green-hover: #5d9100;
    --accent-blue: #3b82f6;
    --accent-purple: #a855f7;
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    margin: 0;
    background: var(--bg-color);
    color: var(--text-primary);
    overflow-x: hidden;
}

.container {
    max-width: 1000px;
    margin: auto;
    padding: 40px 20px;
}

/* Header */
.header {
    margin-bottom: 60px;
    text-align: center;
}

.main-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.2;
    margin-bottom: 20px;
    font-weight: 700;
}

.main-title .highlight {
    color: var(--accent-green);
    background: linear-gradient(90deg, #76b900, #a1ff26);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Sections */
.section {
    margin-bottom: 80px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: 30px;
    border-left: 4px solid var(--accent-green);
    padding-left: 15px;
    color: #fff;
}

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.card {
    background: linear-gradient(145deg, #161e2e, #0f1623);
    border-radius: 16px;
    padding: 24px;
    border: 1px solid var(--card-border);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    border-color: var(--accent-green);
}

.stat-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.card-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 5px;
    background: linear-gradient(180deg, #fff, #ccc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.unit {
    font-size: 0.8rem;
    color: var(--accent-green);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.highlight-card {
    background: linear-gradient(145deg, #1f2f1f, #0f1623);
    border: 1px solid rgba(118, 185, 0, 0.3);
}

/* Charts */
.chart-container {
    background: rgba(17, 24, 39, 0.5);
    border-radius: 16px;
    padding: 20px;
    overflow: hidden;
    position: relative;
}

svg {
    width: 100%;
    height: auto;
    display: block;
}

/* Bar Chart */
.bar {
    fill: url(#gradGreen);
    transition: height 1s ease-out, y 1s ease-out, opacity 0.3s;
    cursor: pointer;
}

.bar:hover {
    opacity: 0.8;
}

.axis text {
    fill: var(--text-secondary);
    font-size: 14px;
}

.bar-value {
    fill: #fff;
    font-size: 14px;
    font-weight: 600;
    transition: opacity 0.5s ease-out 1s;
    /* delay until bars grow */
}

/* Range Chart */
.range-track {
    fill: #1f2937;
}

.range-fill {
    fill: url(#gradBlue);
    transition: width 1.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.range-label {
    fill: #e5e7eb;
    font-size: 14px;
    font-weight: 600;
}

.range-text {
    fill: #fff;
    font-size: 12px;
    transition: opacity 0.5s ease 1.5s;
}

/* Donut Chart Layout */
.donut-layout {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.donut-chart {
    max-width: 250px;
}

.donut-bg {
    stroke: #1f2937;
}

.donut-segment {
    transition: stroke-dasharray 1.5s ease-out;
    transform-origin: center;
}

.chart-center-label {
    fill: var(--text-secondary);
    font-size: 16px;
}

.chart-center-value {
    fill: #fff;
    font-size: 24px;
    font-weight: 700;
}

/* Breakdown Cards */
.compact-grid {
    flex: 1;
    min-width: 280px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.breakdown-card {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    border-left: 4px solid transparent;
}

.card-green {
    border-left-color: var(--accent-green);
}

.card-blue {
    border-left-color: var(--accent-blue);
}

.card-purple {
    border-left-color: var(--accent-purple);
}

.breakdown-card h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.breakdown-card p {
    margin: 5px 0 0;
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
}

/* Insights */
.insight-card {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.insight-icon {
    font-size: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.insight-card p {
    margin: 0;
    line-height: 1.5;
    font-size: 0.95rem;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 60px;
    border-top: 1px solid var(--card-border);
    padding-top: 30px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Mobile Adjustments */
@media (max-width: 600px) {
    .container {
        padding: 20px 15px;
    }

    .main-title {
        font-size: 1.8rem;
    }

    /* Adjust SVG viewBoxes via CSS doesn't work well, relying on preserveAspectRatio */

    /* For range chart, stack labels on mobile if needed, or scroll */
    .range-chart text {
        font-size: 12px;
    }

    /* Adjust tooltip for mobile */
    .tooltip-box {
        max-width: 90vw;
        max-height: 50vh;
        z-index: 1000;
    }
}

/* Tooltip Styles */
.tooltip-box {
    position: fixed;
    background: rgba(17, 24, 39, 0.95);
    border: 1px solid var(--accent-green);
    border-radius: 8px;
    padding: 15px;
    color: #fff;
    font-size: 0.9rem;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    z-index: 9999;
    max-width: 300px;
    min-width: 200px;
}

.tooltip-title {
    font-weight: 700;
    color: var(--accent-green);
    margin-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 5px;
}

.tooltip-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tooltip-list li {
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
    font-size: 0.85rem;
}

.tooltip-list li .label {
    color: var(--text-secondary);
    margin-right: 10px;
}

.tooltip-list li .val {
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
}