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

:root {
    --bg-primary: #050a12;
    --bg-secondary: rgba(10, 18, 30, 0.85);
    --accent: #00b4d8;
    --accent-dim: rgba(0, 180, 216, 0.15);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.6);
    --border: rgba(255, 255, 255, 0.08);
    --glass: rgba(255, 255, 255, 0.03);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

/* Loading Screen */
#loading {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

#loading.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    width: 40px;
    height: 40px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#loading p {
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.02em;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 20px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
}

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

.whale-icon {
    font-size: 1.5rem;
}

.logo h1 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

nav {
    display: flex;
    gap: 4px;
    background: var(--bg-secondary);
    padding: 4px;
    border-radius: 10px;
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
}

.nav-btn {
    padding: 8px 16px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.8125rem;
    font-weight: 500;
}

.nav-btn:hover {
    color: var(--text-primary);
    background: var(--glass);
}

.nav-btn.active {
    background: var(--accent);
    color: var(--bg-primary);
}

/* Globe Container */
#globe-container {
    width: 100%;
    height: 100vh;
    position: absolute;
    top: 0;
    left: 0;
}

/* Info Panel */
#info-panel {
    position: fixed;
    top: 80px;
    right: 24px;
    width: 220px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 18px;
    backdrop-filter: blur(20px);
    z-index: 100;
}

#info-panel h2 {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 14px;
}

#whale-stats {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    background: var(--glass);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.stat-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

#whale-details {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

#whale-details.hidden {
    display: none;
}

#whale-details h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

#whale-details p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    line-height: 1.5;
}

/* Legend */
#legend {
    position: fixed;
    bottom: 24px;
    left: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 18px;
    backdrop-filter: blur(20px);
    z-index: 100;
}

#legend h3 {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.legend-item:last-child {
    margin-bottom: 0;
}

.legend-color {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.legend-color.humpback { background: #f87171; }
.legend-color.blue { background: #60a5fa; }
.legend-color.orca { background: #fbbf24; }
.legend-color.sperm { background: #4ade80; }

/* Controls */
#controls {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    gap: 8px;
    z-index: 100;
}

#controls button {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
}

#controls button:hover {
    color: var(--text-primary);
    background: var(--glass);
    border-color: rgba(255, 255, 255, 0.15);
}

#controls button.active {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

/* Tooltip */
.whale-tooltip {
    position: absolute;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 16px;
    pointer-events: none;
    z-index: 200;
    min-width: 160px;
    transform: translate(-50%, -100%);
    margin-top: -12px;
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.whale-tooltip::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.whale-tooltip h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.whale-tooltip p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: 2px 0;
    line-height: 1.4;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 12px;
        padding: 16px;
    }

    nav {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .nav-btn {
        padding: 6px 12px;
        font-size: 0.75rem;
    }

    #info-panel {
        top: auto;
        bottom: 80px;
        right: 16px;
        left: 16px;
        width: auto;
    }

    #whale-stats {
        flex-direction: row;
    }

    .stat {
        flex: 1;
        flex-direction: column;
        text-align: center;
        gap: 4px;
    }

    #legend {
        display: none;
    }

    #controls {
        bottom: 16px;
        right: 16px;
    }

    #controls button {
        width: 36px;
        height: 36px;
    }
}