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

:root {
    --bg: #0d1117;
    --bg-secondary: #161b22;
    --text: #e6edf3;
    --text-muted: #8b949e;
    --accent: #58a6ff;
    --accent-hover: #79b8ff;
    --border: #30363d;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: var(--accent);
    text-decoration: none;
}

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

/* Navigation */
nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

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

/* Main content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

section {
    margin-bottom: 4rem;
}

/* Hero */
.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn.primary {
    background: var(--accent);
    color: var(--bg);
}

.btn.primary:hover {
    background: var(--accent-hover);
}

.btn.secondary {
    border: 1px solid var(--border);
    color: var(--text);
}

.btn.secondary:hover {
    border-color: var(--text-muted);
}

/* Service cards */
h2 {
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

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

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
}

.card h3 {
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.card p {
    color: var(--text-muted);
}

/* Why us */
.why-us ul {
    list-style: none;
}

.why-us li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
}

.why-us li:last-child {
    border-bottom: none;
}

/* Page content */
.page-content {
    max-width: 800px;
}

.page-content h1 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.page-content h2 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.page-content h3 {
    font-size: 1.25rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--accent);
}

.page-content p {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.page-content ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.page-content li {
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.page-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
}

/* Newsletter form */
.newsletter-cta {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.newsletter-cta .btn {
    display: inline-block;
}

.newsletter-form {
    max-width: 480px;
    margin: 1.5rem auto 0;
}

.form-row {
    display: flex;
    gap: 0.5rem;
}

.form-row input[type="email"] {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
}

.form-row input[type="email"]:focus {
    outline: none;
    border-color: var(--accent);
}

.form-row button {
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.form-row button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-message {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    min-height: 1.25rem;
}

.form-message.success {
    color: #3fb950;
}

.form-message.error {
    color: #f85149;
}

/* Demo page */
.demo-hero {
    text-align: center;
    padding: 4rem 0 2rem;
}

.demo-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.demo-hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.demo-showcase {
    margin-bottom: 3rem;
}

.demo-subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.how-it-works {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    margin-top: 2rem;
}

.how-it-works h3 {
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.step {
    text-align: center;
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--bg);
    font-weight: 700;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
}

.step h4 {
    margin-bottom: 0.5rem;
}

.step p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.demo-features {
    margin-bottom: 3rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

/* Edition cards */
.edition-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.edition-card {
    display: block;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    color: var(--text);
    transition: border-color 0.2s;
}

.edition-card:hover {
    border-color: var(--accent);
    color: var(--text);
}

.edition-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.edition-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.edition-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.edition-number {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
}

.edition-type {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.type-build {
    background: rgba(56, 139, 253, 0.15);
    color: #58a6ff;
}

.type-stack {
    background: rgba(163, 113, 247, 0.15);
    color: #a371f7;
}

.type-signal {
    background: rgba(63, 185, 80, 0.15);
    color: #3fb950;
}

.edition-subscribe {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.edition-subscribe p {
    margin-bottom: 0;
}

/* Code blocks */
.page-content pre {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.25rem;
    overflow-x: auto;
    margin-bottom: 1rem;
}

.page-content code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.875rem;
}

.page-content pre code {
    color: var(--text);
}

.page-content p code {
    background: var(--bg-secondary);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--text);
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
    margin-bottom: 1rem;
}

.page-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.page-content th,
.page-content td {
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    text-align: left;
}

.page-content th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text);
}

.page-content td {
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 1.75rem;
    }

    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }
}