/* 
   2026 'Bold Minimalist Paper' Design
   High Contrast, Serif-led, F-Pattern Flow
*/

@import url('https://fonts.googleapis.com/css2?family=Merriweather:ital,wght@0,300;0,400;0,700;1,400&family=Playfair+Display:wght@700;900&display=swap');

:root {
    /* Colors */
    --bg-color: #FAFAF9;
    /* Off-white paper */
    --surface-color: #FAFAF9;
    --primary-text: #050505;
    /* Near Black */
    --secondary-text: #333333;
    --accent-color: #000000;

    --border-color: #000000;
    --border-light: #E5E5E5;

    --zomato-color: #cb202d;
    --swiggy-color: #FC8019;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1.5rem;
    /* increased for breathability */
    --spacing-md: 3rem;
    --spacing-lg: 6rem;

    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Merriweather', serif;

    --text-base: 1.125rem;
    /* 18px */
    --text-lg: 1.25rem;
    /* 20px */
}

/* Reset */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--primary-text);
    line-height: 1.8;
    font-feature-settings: "kern", "liga";
}

/* Typography Overhaul */
h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    color: var(--primary-text);
    line-height: 1.1;
    font-weight: 900;
    /* Extra Bold */
}

h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    letter-spacing: -0.04em;
    margin-bottom: var(--spacing-md);
    border-bottom: 4px solid var(--primary-text);
    padding-bottom: var(--spacing-sm);
}

h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

p {
    margin-bottom: var(--spacing-sm);
    font-size: var(--text-base);
    color: var(--secondary-text);
    max-width: 65ch;
    /* Optimal reading length */
}

/* Icons */
.icon {
    width: 1.2em;
    height: 1.2em;
    vertical-align: text-bottom;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    margin-right: 0.3em;
}

/* Layout - F-Pattern & Grid */
.container {
    max-width: 98vw;
    margin: 0 4vw;
}

.article-width {
    max-width: 92vw;
    /* Slightly wider than strictly "optimal" to allow for bold images, 
       text constrained via max-width elsewhere if needed */
    margin: 0 4vw;
}

/* On really large screens, we can do a 2-col layout with sticky nav on left */
@media (min-width: 1200px) {
    .page-layout {
        display: grid;
        grid-template-columns: 250px 1fr;
        gap: var(--spacing-lg);
        align-items: start;
    }

    .toc {
        position: sticky;
        top: var(--spacing-md);
    }
}

/* Hero Section */
.hero {
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.hero-meta {
    font-family: 'Inter', sans-serif;
    /* Keep sans for meta/ui text */
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-sm);
    border-top: 1px solid var(--primary-text);
    padding-top: var(--spacing-xs);
    width: fit-content;
}

/* Stats Grid - Minimalist */
.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    border-bottom: 1px solid var(--border-light);
    padding-bottom: var(--spacing-md);
}

.stat-card {
    /* No background, no shadow */
    border-left: 1px solid var(--border-light);
    padding-left: var(--spacing-sm);
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 3rem;
    line-height: 1;
    font-weight: 900;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--secondary-text);
}

/* Navigation / TOC */
.toc {
    background: transparent;
    border: none;
    padding: 0;
    margin-bottom: var(--spacing-lg);
}

.toc h3 {
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-text);
    padding-bottom: var(--spacing-xs);
    display: inline-block;
}

.toc ul {
    list-style: none;
    border-left: 1px solid var(--border-light);
}

.toc li {
    margin-bottom: 0;
}

.toc a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--secondary-text);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    margin-left: -2px;
    /* Pull over border */
}

.toc a:hover {
    color: var(--primary-text);
    border-left-color: var(--primary-text);
    background: #f0f0f0;
}

/* Findings Grid */
.findings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.finding-card {
    border: 2px solid var(--primary-text);
    padding: var(--spacing-sm);
    background: white;
    box-shadow: 8px 8px 0px 0px rgba(0, 0, 0, 1);
    /* Retro brutalist shadow */
    transition: transform 0.2s;
}

.finding-card:hover {
    transform: translate(-2px, -2px);
    box-shadow: 10px 10px 0px 0px rgba(0, 0, 0, 1);
}

/* Visualizations - BIGGER */
.visualization {
    margin: var(--spacing-lg) 0;
    width: 100%;
    /* Break out of container if possible? */
}

.visualization img {
    width: 100%;
    height: auto;
    border: 1px solid var(--primary-text);
    display: block;
}

figcaption {
    margin-top: var(--spacing-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    color: var(--secondary-text);
    border-left: 2px solid var(--accent-color);
    padding-left: var(--spacing-sm);
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
    margin: var(--spacing-md) 0;
    border: 1px solid var(--primary-text);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: var(--primary-text);
    color: white;
    text-transform: uppercase;
    font-family: 'Inter', sans-serif;
    letter-spacing: 0.1em;
    font-size: 0.8rem;
    padding: var(--spacing-sm);
    text-align: left;
}

td {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-light);
    font-variant-numeric: tabular-nums;
}

/* Abstract Box */
.abstract-box {
    border-top: 4px solid var(--primary-text);
    border-bottom: 1px solid var(--primary-text);
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-lg);
    font-size: 1.35rem;
    /* Larger lead text */
    line-height: 1.6;
}

/* Badges */
.badge {
    padding: 0.2em 0.6em;
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: white;
}

.badge.zomato {
    background: #000;
}

/* Monochrome style override? Or keep brand colors? User asked for paper feel. Brand colors ok for accents. */
.badge.swiggy {
    background: #333;
}

/* Reverting to brand colors for clarity but keeping shape simple */
.badge.zomato {
    background: var(--zomato-color);
}

.badge.swiggy {
    background: var(--swiggy-color);
}

/* Download Buttons */
.download-section {
    color: white;

    text-align: left;
    margin-bottom : 2rem;
}

.download-grid {
    display: flex;
    justify-content: left;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    background: white;
    color: black;
    padding: 1rem 2rem;
    text-decoration: none;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid black;
    box-shadow: 4px 4px 0 white;
    /* Inverted brutalist */
    transition: transform 0.1s;
}

.btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 white;
}

/* Footer */
footer {
    border-top: 4px solid black;
    padding: var(--spacing-lg) 0;
    margin-top: 0;
    /* Connected to download section */
    text-align: left;
}

footer a {
    color: black;
    font-weight: bold;
}

/* Utilities */
.mt-sm {
    margin-top: var(--spacing-sm);
}

/* Responsive adjustments */
@media (max-width: 1200px) {
    .page-layout {
        display: block;
    }

    .toc {
        position: static;
        border-bottom: 1px solid var(--border-light);
        padding-bottom: var(--spacing-md);
    }

    .toc ul {
        border-left: none;
        border-top: 1px solid var(--border-light);
        padding-top: var(--spacing-sm);
        columns: 2;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .toc ul {
        columns: 1;
    }

    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }
}