:root {
    --bg-color: #050505;
    --panel-bg: rgba(10, 10, 10, 0.85);
    --panel-border: rgba(255, 255, 255, 0.1);
    --text-primary: #e0e0e0;
    --text-secondary: #888;
    --accent-quake: #ff4444;
    --accent-flight: #00ffaa;
    --accent-iss: #ffffff;
    --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body, html {
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    font-family: var(--font-stack);
    overflow: hidden;
    color: var(--text-primary);
}

#viz-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.overlay-ui {
    position: absolute;
    z-index: 10;
    pointer-events: none; /* Allow clicking through to map where possible */
    width: 100%;
    height: 100%;
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    padding: 16px;
    pointer-events: auto;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.header-panel {
    align-self: flex-start;
    min-width: 280px;
}

.header-panel h1 {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #fff;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.live-indicator {
    width: 6px;
    height: 6px;
    background: #0f0;
    border-radius: 50%;
    box-shadow: 0 0 8px #0f0;
    animation: blink 2s infinite;
}

.subtitle {
    font-size: 11px;
    color: var(--text-secondary);
}

.stats-panel {
    position: absolute;
    top: 24px;
    right: 24px;
    text-align: right;
}

.stat-item {
    margin-bottom: 12px;
}

.stat-value {
    font-size: 24px;
    font-weight: 300;
    font-feature-settings: "tnum";
}

.stat-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.controls {
    position: absolute;
    bottom: 24px;
    right: 24px;
    display: flex;
    gap: 8px;
}

.btn {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--panel-border);
    color: var(--text-secondary);
    padding: 8px 16px;
    font-size: 11px;
    border-radius: 4px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s;
    backdrop-filter: blur(4px);
    pointer-events: auto;
}

.btn:hover {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-color: rgba(255,255,255,0.3);
}

.btn.active {
    background: var(--text-primary);
    color: #000;
    font-weight: 600;
    border-color: var(--text-primary);
}

#tooltip {
    position: absolute;
    background: rgba(0, 0, 0, 0.9);
    border: 1px solid var(--panel-border);
    border-left: 2px solid #fff;
    padding: 12px 16px;
    border-radius: 4px;
    pointer-events: none;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.2s, transform 0.2s;
    font-size: 12px;
    z-index: 100;
    max-width: 300px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.8);
}

#tooltip h3 {
    font-size: 13px;
    margin-bottom: 8px;
    color: #fff;
    font-weight: 600;
}

#tooltip .row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 4px;
    color: #aaa;
}

#tooltip .val {
    color: #ddd;
    font-family: monospace;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.legend {
    display: flex;
    gap: 16px;
    margin-top: 12px;
    font-size: 10px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}