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

:root {
    --bg-dark: #0a0e27;
    --bg-dark-2: #1a1e3a;
    --bg-gradient: linear-gradient(135deg, #0a0e27 0%, #1a1e3a 50%, #2a2e4a 100%);
    --accent-blue: #4169E1;
    --accent-purple: #8B5CF6;
    --accent-gold: #FFD700;
    --text-primary: #ffffff;
    --text-secondary: #b8c1ec;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] {
    --bg-dark: #f0f4f8;
    --bg-dark-2: #e1e8ed;
    --bg-gradient: linear-gradient(135deg, #f0f4f8 0%, #e1e8ed 50%, #d1d8dd 100%);
    --text-primary: #1a1e3a;
    --text-secondary: #4a5568;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
}

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

.container {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Header */
header {
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-controls {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Canvas */
.canvas-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse at center, #1a1e3a 0%, #0a0e27 100%);
}

#solarSystemCanvas {
    width: 100%;
    height: 100%;
    cursor: grab;
    display: block;
}

#solarSystemCanvas:active {
    cursor: grabbing;
}

/* Zoom Controls */
.zoom-controls {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 10;
}

.zoom-btn {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.zoom-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.05);
}

/* Control Panel */
.control-panel {
    position: absolute;
    left: 20px;
    top: 100px;
    width: 320px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    z-index: 50;
}

.control-group {
    margin-bottom: 1.5rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.button-group {
    display: flex;
    gap: 0.5rem;
}

.btn {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    color: var(--text-primary);
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn.primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border: none;
    color: white;
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(65, 105, 225, 0.4);
}

/* Slider */
.slider-container {
    margin-top: 0.5rem;
}

#speedSlider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--glass-border);
    outline: none;
    -webkit-appearance: none;
}

#speedSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(65, 105, 225, 0.5);
}

#speedSlider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    cursor: pointer;
    border: none;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

#speedValue {
    color: var(--accent-blue);
    font-weight: 600;
}

/* Toggle Group */
.toggle-group {
    display: flex;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 4px;
    border-radius: 12px;
}

.toggle-btn {
    flex: 1;
    padding: 0.6rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.toggle-btn.active {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
}

.scale-info {
    margin-top: 0.75rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Checkboxes */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.checkbox-label:hover {
    color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-blue);
}

/* Info Panel */
.info-panel {
    position: absolute;
    right: 20px;
    top: 100px;
    width: 360px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    z-index: 50;
    transform: translateX(400px);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.info-panel.active {
    transform: translateX(0);
}

.close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: rgba(255, 0, 0, 0.3);
    transform: scale(1.1);
}

#planetName {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.planet-icon {
    font-size: 4rem;
    text-align: center;
    margin: 1rem 0 1.5rem;
}

.info-grid {
    display: grid;
    gap: 1rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Tabs */
.info-tabs {
    display: flex;
    gap: 0.25rem;
    margin: 1.5rem 0 1rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 4px;
    border-radius: 12px;
}

.tab-btn {
    flex: 1;
    padding: 0.5rem 0.25rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    transform: scale(1.05);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.info-section {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    padding: 1rem;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.info-row:last-child {
    border-bottom: none;
}

.info-row .label {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.info-row .value {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.no-data {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-style: italic;
    text-align: center;
    padding: 1rem;
}

.facts-list {
    list-style: none;
    padding: 0;
}

.facts-list li {
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    background: rgba(65, 105, 225, 0.1);
    border-left: 3px solid var(--accent-blue);
    border-radius: 8px;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.facts-list li:last-child {
    margin-bottom: 0;
}

.section-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 0.75rem;
}

.composition-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.composition-item {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.5rem;
    border-radius: 8px;
    text-align: center;
}

.composition-item .element {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.composition-item .percentage {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-top: 0.25rem;
}

.moon-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.moon-chip {
    padding: 0.4rem 0.75rem;
    background: rgba(65, 105, 225, 0.2);
    border-radius: 16px;
    font-size: 0.75rem;
    color: var(--text-primary);
}

.fun-facts {
    margin-top: 1.5rem;
    padding: 1rem;
    background: rgba(65, 105, 225, 0.1);
    border-left: 3px solid var(--accent-blue);
    border-radius: 12px;
}

.fun-facts h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--accent-blue);
}

.fun-facts p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Legend */
.legend {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow);
    z-index: 50;
}

.legend h4 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
}

.legend-items {
    display: flex;
    gap: 1.5rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    box-shadow: 0 0 8px currentColor;
}

/* Scrollbar */
.control-panel::-webkit-scrollbar,
.info-panel::-webkit-scrollbar {
    width: 6px;
}

.control-panel::-webkit-scrollbar-track,
.info-panel::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 3px;
}

.control-panel::-webkit-scrollbar-thumb,
.info-panel::-webkit-scrollbar-thumb {
    background: var(--accent-blue);
    border-radius: 3px;
}

/* Responsive */
@media (max-width: 1200px) {
    .control-panel {
        width: 280px;
    }

    .info-panel {
        width: 320px;
    }
}

@media (max-width: 768px) {
    .control-panel {
        width: calc(100% - 40px);
        left: 20px;
        right: 20px;
        max-height: 50vh;
    }

    .info-panel {
        width: calc(100% - 40px);
        right: 20px;
        transform: translateY(100%);
        top: auto;
        bottom: 20px;
    }

    .info-panel.active {
        transform: translateY(0);
    }

    .legend {
        left: 20px;
        right: 20px;
        transform: none;
        width: calc(100% - 40px);
    }

    .legend-items {
        flex-direction: column;
        gap: 0.75rem;
    }
}