/* /*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
   global reset and colorssss
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       */
*,
*::before,
*::after {
    box-sizing: border-box;
}

:root {
    --bg-main: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 100%);
    --panel-bg: rgba(255, 255, 255, 0.95);
    --panel-border: rgba(148, 163, 184, 0.2);
    --shadow-soft: 0 10px 25px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.12);
    --accent: #8b5cf6;
    --accent-light: #a78bfa;
    --accent-secondary: #ec4899;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --radius-lg: 16px;
    --radius-md: 12px;
    --panel-padding: 16px;
}

/*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
        page structure
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁        */
body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg-main);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(139, 92, 246, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(59, 130, 246, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

body > * {
    position: relative;
    z-index: 1;
}

/*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
            header
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁        */
.header {
    text-align: center;
    padding: 32px 16px;
    background: linear-gradient(135deg, #8b5cf6, #6366f1, #3b82f6);
    color: white;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.1); opacity: 0.5; }
}

.header h1 {
    margin: 0;
    font-size: 32px;
    letter-spacing: -0.5px;
    font-weight: 700;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.header p {
    margin: 10px 0 0;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    z-index: 1;
    font-weight: 300;
}

/*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
        main layout grid
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       */
.main-container {
    width: 100vw; /* full viewport width */
    max-width: 100vw; /* no max width */
    margin: 0; /* remove default margin */
    padding: 18px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    flex: 1;
    box-sizing: border-box;
}


/*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
        panel styling
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁        */
.panel-large,
.panel-small {
    background: var(--panel-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(8px);
    overflow: hidden;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.panel-large::before,
.panel-small::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light), var(--accent-secondary));
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 10;
}

.panel-large:hover,
.panel-small:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.panel-large:hover::before,
.panel-small:hover::before {
    opacity: 1;
}

/* big left chart */
.panel-large {
    min-height: 520px;
    display: flex;
    padding-top: 30px;
}

/* right column */
.side-column {
    display: grid;
    grid-template-rows: 1fr 1fr;
    gap: 18px;
    height: 100%;
}

/* small right panels */
.panel-small {
    min-height: 250px;
    display: flex;
    padding-top: 30px;
}

/*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
        panel labels
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁        */
.panel-large {
    width: 100%;
    min-height: 520px;
    display: flex;
    padding-top: 30px;
    box-sizing: border-box;
}


.panel-small:nth-child(1)::after {
    content: 'Geographic View';
    position: absolute;
    top: 8px;
    left: 16px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-muted);
    opacity: 0.6;
    z-index: 5;
    pointer-events: none;
}

.panel-small:nth-child(2)::after {
    content: 'Trends';
    position: absolute;
    top: 8px;
    left: 16px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-muted);
    opacity: 0.6;
    z-index: 5;
    pointer-events: none;
}

/*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
    two other grids (assignments grids) 
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       */
.assignment-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    padding: 18px;
    min-height: 1200px; 
}

/* sections */
.assignment-3-section {
    background: var(--panel-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--panel-border);
    padding: 20px 20px 24px;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.assignment-3-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.assignment-3-section:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.assignment-3-section:hover::after {
    transform: scaleX(1);
}

/* headers */
.assignment-3-section h2 {
    margin: 0 0 8px;
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.assignment-3-section h2::before {
    content: '';
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, var(--accent), var(--accent-secondary));
    border-radius: 2px;
    flex-shrink: 0;
}

/* text */
.assignment-3-section p {
    margin: 0 0 14px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    padding-left: 14px;
}

/* iframe */
.visualization-iframe {
    flex-grow: 1;
    width: 100%;
    height: 400px;
    border: none;
    border-radius: var(--radius-md);
    background: white;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

/*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
        small screens 
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁        */
@media (max-width: 900px) {
    .main-container {
        grid-template-columns: 1fr;
    }
    .side-column {
        grid-template-rows: auto;
    }
    .assignment-grid {
        grid-template-columns: 1fr;
    }
}

/*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
        vega overrides
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁        */
.vega-embed {
    width: 100% !important;
    height: 100% !important;
}

.vega-embed > svg,
.vega-embed > canvas {
    width: 100% !important;
    height: 100% !important;
}

html {
    scroll-behavior: smooth;
}

/*     . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁       
        footer stuff
    . ݁₊ ⊹ . ݁˖ . ݁ . ݁₊ ⊹ . ݁˖ . ݁        */
.footer {
    text-align: center;
    padding: 24px 16px;
    background: var(--panel-bg);
    border-top: 1px solid var(--panel-border);
    margin-top: 20px;
    font-size: 13px;
    color: var(--text-muted);
}

.footer p {
    margin: 0;
}

.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--panel-border), transparent);
    margin: 32px 0;
}

#viz {
    width: 100%;
    height: 520px; 
  
    max-width: 100%;
}