/* Case Study Dark Theme - Matches main site */
:root {
    /* Colors - Warm coral palette (Monzo-inspired) */
    --primary: #FF7F6E;
    --primary-hover: #FF6B57;
    --accent: #FF7F6E;
    --accent-light: rgba(255, 127, 110, 0.15);
    --teal: #FF9B8E;
    --teal-light: rgba(255, 155, 142, 0.15);
    
    /* Dark neutrals */
    --text: #E8EDF2;
    --text-light: #8B95A5;
    --bg: #050708;
    --white: #0a0c0f;
    --border: #151a20;
    --aws-dark: #0a0c0f;
    
    /* Code colors */
    --code-bg: #0d1117;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Back link */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 24px;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--accent);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #0a0c0f 0%, #151a20 100%);
    color: var(--text);
    padding: 80px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,127,110,0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-block;
    background: var(--accent);
    color: #0a0c0f;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
    text-transform: uppercase;
}

h1 {
    font-family: 'Inter', sans-serif;
    font-size: 42px;
    font-weight: 500;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    max-width: 650px;
    margin-bottom: 40px;
}

.meta-row {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-light);
}

.meta-item svg {
    width: 18px;
    height: 18px;
    stroke: var(--accent);
}

/* Main Content */
.main {
    padding: 60px 0;
}

section {
    margin-bottom: 60px;
}

h2 {
    font-family: 'Inter', sans-serif;
    font-size: 28px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 24px;
    position: relative;
    padding-bottom: 16px;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}

h3 {
    font-size: 20px;
    font-weight: 500;
    color: var(--text);
    margin: 32px 0 16px;
}

p {
    margin-bottom: 20px;
    color: var(--text-light);
}

strong {
    color: var(--text);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 40px 0;
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

.stat-card {
    background: var(--white);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    border: 1px solid var(--border);
    transition: transform 0.2s, border-color 0.2s;
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
}

.stat-number {
    font-family: 'Inter', sans-serif;
    font-size: 48px;
    font-weight: 500;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-number.green {
    color: var(--teal);
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
}

/* Chart Container */
.chart-container {
    background: var(--white);
    border-radius: 12px;
    padding: 32px;
    margin: 32px 0;
    border: 1px solid var(--border);
}

.chart-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 24px;
}

.data-image {
    width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.image-caption {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 16px;
    font-style: italic;
}

/* Code Block */
.code-block {
    background: var(--code-bg);
    border-radius: 12px;
    padding: 28px 32px;
    margin: 32px 0;
    overflow-x: auto;
    border: 1px solid var(--border);
}

.code-block-title {
    font-size: 12px;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.code-block pre {
    margin: 0;
    font-family: 'JetBrains Mono', 'Monaco', 'Menlo', monospace;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text);
}

.code-block .keyword { color: #ff79c6; }
.code-block .function { color: #8be9fd; }
.code-block .string { color: #f1fa8c; }
.code-block .number { color: #bd93f9; }
.code-block .comment { color: #6272a4; }

/* Key Insight Box */
.insight-box {
    background: var(--accent-light);
    border-left: 3px solid var(--accent);
    border-radius: 0 12px 12px 0;
    padding: 28px 32px;
    margin: 32px 0;
}

.insight-box h4 {
    color: var(--accent);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.insight-box p {
    margin: 0;
    font-size: 16px;
    color: var(--text);
}

.insight-box.teal {
    background: var(--teal-light);
    border-left-color: var(--teal);
}

.insight-box.teal h4 {
    color: var(--teal);
}

/* Timeline */
.timeline {
    position: relative;
    margin: 40px 0;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent), var(--teal));
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -40px;
    top: 4px;
    width: 16px;
    height: 16px;
    background: var(--bg);
    border: 2px solid var(--accent);
    border-radius: 50%;
}

.timeline-item:last-child::before {
    border-color: var(--teal);
}

.timeline-item h4 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.timeline-item p {
    margin: 0;
    font-size: 14px;
    color: var(--text-light);
}

/* Before/After Comparison */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 24px;
    align-items: center;
    margin: 40px 0;
}

@media (max-width: 600px) {
    .comparison-grid {
        grid-template-columns: 1fr;
    }
}

.comparison-card {
    background: var(--white);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    border: 1px solid var(--border);
}

.comparison-card.before {
    border-color: #5B6370;
}

.comparison-card.after {
    border-color: var(--accent);
}

.comparison-card h4 {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.comparison-card.before h4 {
    color: var(--text-light);
}

.comparison-card.after h4 {
    color: var(--accent);
}

.comparison-value {
    font-family: 'Inter', sans-serif;
    font-size: 38px;
    font-weight: 500;
    margin-bottom: 8px;
}

.comparison-card.before .comparison-value {
    color: var(--text-light);
}

.comparison-card.after .comparison-value {
    color: var(--accent);
}

.comparison-label {
    font-size: 14px;
    color: var(--text-light);
}

.comparison-arrow {
    font-size: 28px;
    color: var(--accent);
}

@media (max-width: 600px) {
    .comparison-arrow {
        transform: rotate(90deg);
    }
}

/* Tech Stack */
.tech-stack {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 24px 0;
}

.tech-tag {
    background: var(--white);
    color: var(--text);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--border);
}

.tech-tag.python {
    border-color: #3776ab;
    color: #5B9BD5;
}

.tech-tag.aws {
    border-color: #ff9900;
    color: #ff9900;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #0a0c0f 0%, #151a20 100%);
    border-radius: 16px;
    padding: 48px;
    text-align: center;
    color: var(--text);
    margin-top: 60px;
    border: 1px solid var(--border);
}

.cta-section h2 {
    color: var(--text);
}

.cta-section h2::after {
    left: 50%;
    transform: translateX(-50%);
}

.cta-section p {
    color: var(--text-light);
    max-width: 500px;
    margin: 0 auto 32px;
}

.cta-button {
    display: inline-block;
    background: var(--accent);
    color: #0a0c0f;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: transform 0.2s, opacity 0.2s;
}

.cta-button:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 0;
    color: var(--text-light);
    font-size: 14px;
    border-top: 1px solid var(--border);
}

footer a {
    color: var(--accent);
}

/* Responsive */
@media (max-width: 600px) {
    h1 {
        font-size: 28px;
    }

    h2 {
        font-size: 22px;
    }

    .hero {
        padding: 60px 0 80px;
    }

    .stat-number {
        font-size: 36px;
    }
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

th, td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: var(--code-bg);
    color: var(--text);
    font-weight: 500;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    color: var(--text-light);
}

tr:last-child td {
    border-bottom: none;
}

/* Lists */
ul, ol {
    margin: 16px 0;
    padding-left: 24px;
    color: var(--text-light);
}

li {
    margin-bottom: 8px;
}