/* ==========================================================================
   PlanetPulse - Global Metrics Globe
   Styles for the visualization app
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables & Theme
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-bg-primary: #0a0f1a;
    --color-bg-secondary: #121a2e;
    --color-bg-tertiary: #1a2540;
    --color-text-primary: #e8ecf4;
    --color-text-secondary: #8b95a8;
    --color-accent: #4a9eff;
    --color-accent-hover: #6bb3ff;
    --color-success: #4ade80;
    --color-warning: #fbbf24;
    --color-error: #f87171;

    /* Metric color scales */
    --color-metric-low: #22d3ee;
    --color-metric-mid: #facc15;
    --color-metric-high: #ef4444;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: 1.5;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
}

/* --------------------------------------------------------------------------
   App Layout
   -------------------------------------------------------------------------- */
#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

/* Header */
#header {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-bg-tertiary);
    text-align: center;
    flex-shrink: 0;
}

#header h1 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

#header .tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Main content */
#main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   Globe Section
   -------------------------------------------------------------------------- */
#globe-section {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

#globe-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse at center, #1a2540 0%, #0a0f1a 100%);
}

#globe-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* Loading overlay */
#loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(10, 15, 26, 0.9);
    z-index: 10;
    transition: opacity var(--transition-normal);
}

#loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--color-bg-tertiary);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#loading-overlay p {
    margin-top: var(--spacing-md);
    color: var(--color-text-secondary);
}

/* Error overlay */
#error-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(10, 15, 26, 0.95);
    z-index: 10;
}

#error-overlay.hidden {
    display: none;
}

#error-message {
    color: var(--color-error);
    margin-bottom: var(--spacing-md);
}

#retry-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-md);
    transition: background var(--transition-fast);
}

#retry-btn:hover {
    background: var(--color-accent-hover);
}

#retry-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.3);
}

/* Globe controls */
#globe-controls {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-sm);
    z-index: 5;
}

.control-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.control-btn:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-accent);
}

.control-btn:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.3);
}

.control-btn .icon {
    font-size: 1.1em;
}

/* --------------------------------------------------------------------------
   Info Panel
   -------------------------------------------------------------------------- */
#info-panel {
    width: 320px;
    background: var(--color-bg-secondary);
    border-left: 1px solid var(--color-bg-tertiary);
    overflow-y: auto;
    flex-shrink: 0;
}

.panel-section {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-bg-tertiary);
}

.panel-section:last-child {
    border-bottom: none;
}

.panel-section h2 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Metric selector */
#metric-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.metric-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-md);
    text-align: left;
    transition: all var(--transition-fast);
}

.metric-btn:hover {
    background: var(--color-bg-primary);
    border-color: var(--color-bg-tertiary);
}

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

.metric-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.3);
}

/* Legend */
#legend-gradient {
    height: 16px;
    border-radius: var(--radius-sm);
    background: linear-gradient(to right,
        var(--color-metric-low),
        var(--color-metric-mid),
        var(--color-metric-high)
    );
    margin-bottom: var(--spacing-xs);
}

#legend-labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
}

#legend-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-style: italic;
}

/* Details panel */
#details-content {
    font-size: var(--font-size-sm);
}

#details-content .placeholder {
    color: var(--color-text-secondary);
    font-style: italic;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-bg-tertiary);
}

.detail-item:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--color-text-secondary);
}

.detail-value {
    font-weight: 500;
    text-align: right;
}

.detail-value.magnitude-high {
    color: var(--color-metric-high);
}

.detail-value.magnitude-mid {
    color: var(--color-metric-mid);
}

.detail-value.magnitude-low {
    color: var(--color-metric-low);
}

/* Time filter */
#time-filter-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

#time-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    outline: none;
    cursor: pointer;
}

#time-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--color-accent);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#time-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 0 8px var(--color-accent);
}

#time-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--color-accent);
    border-radius: 50%;
    border: none;
    cursor: pointer;
}

#time-labels {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

#time-value {
    color: var(--color-accent);
    font-weight: 500;
}

/* Stats panel */
.stat-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
}

.stat-label {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.stat-value {
    font-weight: 600;
    color: var(--color-accent);
    transition: color var(--transition-fast);
}

/* Data source attribution */
#data-source {
    padding: var(--spacing-md) var(--spacing-lg);
}

.attribution {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-align: center;
}

.attribution a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.attribution a:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Tooltip
   -------------------------------------------------------------------------- */
#tooltip {
    position: fixed;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: var(--font-size-sm);
    pointer-events: none;
    z-index: 100;
    max-width: 250px;
    transition: opacity var(--transition-fast);
}

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

#tooltip .tooltip-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

#tooltip .tooltip-value {
    color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */

/* Tablet and below */
@media (max-width: 900px) {
    #main-content {
        flex-direction: column;
    }

    #globe-section {
        flex: 1;
        min-height: 50vh;
    }

    #info-panel {
        width: 100%;
        max-height: 50vh;
        border-left: none;
        border-top: 1px solid var(--color-bg-tertiary);
    }

    .panel-section {
        padding: var(--spacing-md);
    }

    #metric-buttons {
        flex-direction: row;
    }

    .metric-btn {
        flex: 1;
        justify-content: center;
    }
}

/* Mobile */
@media (max-width: 480px) {
    #header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    #header h1 {
        font-size: var(--font-size-lg);
    }

    .control-btn .label {
        display: none;
    }

    #globe-controls {
        bottom: var(--spacing-md);
    }

    .panel-section {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .panel-section h2 {
        font-size: 0.75rem;
        margin-bottom: var(--spacing-sm);
    }
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}