:root {
    --bg-dark: #111318;
    --bg-surface: #181A20;
    --bg-card: #1E2028;
    --bg-elevated: #282B36;
    --primary: #6366F1;
    --primary-strong: #4F46E5;
    --mint: #10B981;
    --mint-muted: rgba(16, 185, 129, 0.14);
    --text-main: #F8F9FA;
    --text-secondary: #9CA3AF;
    --border-subtle: rgba(255, 255, 255, 0.09);
    --border-highlight: rgba(99, 102, 241, 0.45);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.site-header {
    border-bottom: 1px solid var(--border-subtle);
    background-color: rgba(17, 19, 24, 0.92);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
}

.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.01em;
}

.brand-icon {
    width: 36px;
    height: 36px;
    border-radius: 9px;
    border: 1px solid var(--border-subtle);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: color 0.15s ease;
}

.nav-links a:hover {
    color: var(--text-main);
}

.hero {
    padding: 5rem 0 4.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3.5rem;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    background: var(--mint-muted);
    color: #34D399;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
}

.hero h1 {
    font-size: clamp(2.25rem, 4.5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.025em;
    margin-bottom: 1.25rem;
    color: var(--text-main);
}

.hero-lead {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 0.875rem 1.5rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--primary);
    color: #FFFFFF;
}

.btn-primary:hover {
    background-color: var(--primary-strong);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
    border-color: rgba(255, 255, 255, 0.25);
    background-color: var(--bg-elevated);
}

.receipt-preview {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    padding: 1.75rem;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.45);
}

.receipt-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 1.25rem;
}

.receipt-merchant {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-main);
}

.receipt-meta {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 0.2rem;
}

.receipt-badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.65rem;
    border-radius: 6px;
    background-color: var(--bg-elevated);
    color: #818CF8;
    border: 1px solid var(--border-highlight);
}

.receipt-amount-block {
    margin-bottom: 1.25rem;
}

.receipt-amount-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
}

.receipt-amount-value {
    font-size: 2rem;
    font-weight: 800;
    color: #34D399;
    letter-spacing: -0.02em;
}

.receipt-lines {
    list-style: none;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.875rem 0;
    margin-bottom: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.receipt-lines li {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.receipt-lines li span:last-child {
    color: var(--text-main);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.receipt-footer-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.receipt-project-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--text-main);
    font-weight: 600;
}

.section {
    padding: 4.5rem 0;
    border-bottom: 1px solid var(--border-subtle);
}

.section-header {
    max-width: 680px;
    margin-bottom: 2.75rem;
}

.section-title {
    font-size: clamp(1.65rem, 3vw, 2.125rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.65rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background-color: var(--bg-card);
    padding: 1.75rem;
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
}

.feature-icon {
    width: 44px;
    height: 44px;
    background-color: rgba(99, 102, 241, 0.16);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.125rem;
    color: #818CF8;
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.55;
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.plan-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.plan-card.plan-pro {
    border-color: var(--border-highlight);
    background-color: var(--bg-surface);
}

.plan-header {
    margin-bottom: 1.5rem;
}

.plan-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.plan-price {
    font-size: 1.75rem;
    font-weight: 800;
    color: #34D399;
}

.plan-price span {
    font-size: 0.9375rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.plan-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.plan-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.plan-list li svg {
    flex-shrink: 0;
    margin-top: 0.2rem;
    color: #34D399;
}

.markdown-content {
    max-width: 820px;
    margin: 3.5rem auto 2.5rem;
    padding: 2.5rem 3rem;
    background-color: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
}

.markdown-content h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    color: var(--text-main);
    letter-spacing: -0.02em;
}

.markdown-content h2 {
    font-size: 1.35rem;
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-main);
}

.markdown-content h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
    color: #34D399;
}

.markdown-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 0.96875rem;
}

.markdown-content strong {
    color: var(--text-main);
    font-weight: 600;
}

.markdown-content ul,
.markdown-content ol {
    margin: 0.5rem 0 1.25rem 1.5rem;
    color: var(--text-secondary);
}

.markdown-content li {
    margin-bottom: 0.5rem;
    font-size: 0.96875rem;
}

.markdown-content a {
    color: #818CF8;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.markdown-content a:hover {
    color: #A5B4FC;
}

.markdown-content code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.875em;
    background-color: var(--bg-elevated);
    color: var(--text-main);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
}

footer {
    padding: 3rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.footer-inner a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.15s ease;
}

.footer-inner a:hover {
    color: var(--text-main);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

@media (max-width: 860px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .markdown-content {
        margin: 2rem auto;
        padding: 1.75rem 1.25rem;
    }
}