@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Playfair+Display:wght@600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --primary: #1e3a5f;
    --primary-light: #2d5a8b;
    --accent: #c9a227;
    --accent-light: #e8c547;
    --text: #2d3748;
    --text-light: #718096;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --border: #e2e8f0;
    --success: #38a169;
    --code-bg: #0f172a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, sans-serif;
    font-size: 17px;
    line-height: 1.8;
    color: var(--text);
    background: var(--bg);
}

/* Progress Bar */
.progress-wrap {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--border);
    z-index: 9999;
}
.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transition: width 0.15s ease-out;
}

/* Cover */
.cover {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 60px 24px;
    color: white;
}
.cover-badge {
    background: var(--accent);
    color: var(--primary);
    padding: 10px 28px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 40px;
}
.cover h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(40px, 10vw, 64px);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}
.cover-sub {
    font-size: clamp(16px, 3vw, 22px);
    opacity: 0.9;
    max-width: 600px;
    margin-bottom: 48px;
}
.cover-stats {
    display: flex;
    gap: 48px;
    flex-wrap: wrap;
    justify-content: center;
}
.cover-stat {
    text-align: center;
}
.cover-stat-num {
    font-size: 48px;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}
.cover-stat-label {
    font-size: 14px;
    opacity: 0.8;
    margin-top: 8px;
}

/* Content */
.content {
    max-width: 780px;
    margin: 0 auto;
    padding: 64px 24px;
}

/* Markdown Styles */
.content h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 36px;
    color: var(--primary);
    margin: 72px 0 24px;
    padding-bottom: 16px;
    border-bottom: 3px solid var(--accent);
}
.content h1:first-child { margin-top: 0; }

.content h2 {
    font-size: 26px;
    color: var(--primary);
    margin: 48px 0 20px;
}

.content h3 {
    font-size: 20px;
    color: var(--primary);
    margin: 36px 0 16px;
}

.content h4 {
    font-size: 17px;
    color: var(--text);
    margin: 28px 0 12px;
}

.content p { margin-bottom: 16px; }
.content strong { color: var(--primary); }

.content ul, .content ol {
    margin: 16px 0 24px 24px;
}
.content li { margin-bottom: 8px; }

.content hr {
    border: none;
    height: 2px;
    background: var(--border);
    margin: 48px 0;
}

/* Tables */
.content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 15px;
}
.content th {
    background: var(--primary);
    color: white;
    padding: 14px 16px;
    text-align: left;
    font-weight: 600;
}
.content th:first-child { border-radius: 8px 0 0 0; }
.content th:last-child { border-radius: 0 8px 0 0; }
.content td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
}
.content tr:nth-child(even) { background: var(--bg-alt); }

/* Blockquotes */
.content blockquote {
    background: var(--bg-alt);
    border-left: 4px solid var(--accent);
    padding: 20px 24px;
    margin: 24px 0;
    border-radius: 0 12px 12px 0;
}
.content blockquote p { margin: 0; }

/* Code */
.content code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    background: var(--bg-alt);
    padding: 3px 8px;
    border-radius: 4px;
    color: var(--primary);
}

.content pre {
    background: var(--code-bg);
    border-radius: 12px;
    padding: 24px;
    margin: 24px 0;
    overflow-x: auto;
    position: relative;
}
.content pre code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
    color: #e2e8f0;
    background: none;
    padding: 0;
    display: block;
    white-space: pre-wrap;
}

/* Copy Button */
.copy-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--accent);
    color: var(--primary);
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    transition: all 0.2s;
    opacity: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}
.content pre:hover .copy-btn { opacity: 1; }
.copy-btn:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
}
.copy-btn.copied {
    background: var(--success);
    color: white;
}

/* Checkboxes */
.content input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    accent-color: var(--success);
    cursor: pointer;
}

/* Paywall */
.paywall {
    position: relative;
    margin: 80px 0;
}
.paywall-fade {
    position: absolute;
    top: -150px;
    left: -24px;
    right: -24px;
    height: 200px;
    background: linear-gradient(to bottom, transparent, white);
    pointer-events: none;
}
.paywall-box {
    position: relative;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 24px;
    padding: 56px 40px;
    text-align: center;
    color: white;
    box-shadow: 0 25px 80px rgba(30, 58, 95, 0.35);
}
.paywall-box h2 {
    font-family: 'Playfair Display', serif;
    font-size: 32px;
    color: white;
    margin: 0 0 12px;
}
.paywall-box > p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
}
.paywall-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 36px;
    text-align: left;
}
.paywall-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
}
.paywall-feature span:first-child {
    width: 26px;
    height: 26px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}
.paywall-price {
    margin-bottom: 28px;
}
.paywall-price .old {
    font-size: 22px;
    text-decoration: line-through;
    opacity: 0.5;
    margin-right: 12px;
}
.paywall-price .current {
    font-size: 56px;
    font-weight: 800;
    color: var(--accent);
}
.paywall-btn {
    background: var(--accent);
    color: var(--primary);
    border: none;
    padding: 20px 56px;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}
.paywall-btn:hover {
    background: var(--accent-light);
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(201, 162, 39, 0.4);
}
.paywall-guarantee {
    margin-top: 20px;
    font-size: 14px;
    opacity: 0.7;
}

/* Hidden states */
.paywall.hidden { display: none; }
#paid-content { display: none; }
#paid-content.unlocked { display: block; }

/* Footer */
.footer {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-light);
    font-size: 14px;
    border-top: 1px solid var(--border);
    margin-top: 80px;
}

/* Responsive */
@media (max-width: 640px) {
    .content { padding: 48px 20px; }
    .paywall-box { padding: 40px 24px; }
    .paywall-features { grid-template-columns: 1fr; }
    .cover-stats { gap: 32px; }
}

/* Print */
@media print {
    .progress-wrap, .paywall, .copy-btn { display: none; }
}