/* --- RESET & VARIABLES --- */
:root {
    --bg-color: #0a0a0a;
    --card-bg: #0d1117;
    --text-primary: #e0e6ed;
    --text-secondary: #8b949e;
    --accent: #ff9500;
    --accent-hover: #e08600;
    --border: #30363d;
    --code-bg: #0d1117;
    --success: #4ade80;
    --glow: rgba(255, 149, 0, 0.15);
    --font-mono: 'SF Mono', 'Fira Code', 'Roboto Mono', 'Courier New', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* --- LAYOUT UTILITIES --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
    border-bottom: 1px solid var(--border);
}

section:last-of-type {
    border-bottom: none;
}

/* --- NAVIGATION --- */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.links a {
    margin-left: 24px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

/* --- HERO --- */
.hero {
    padding: 120px 0 100px;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.subhead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
}

.cta pre {
    background: var(--code-bg);
    padding: 16px 24px;
    border-radius: 6px;
    border: 1px solid var(--border);
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent);
}

.cta-note {
    display: block;
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* --- PHILOSOPHY --- */
.philosophy blockquote {
    font-size: 1.5rem;
    font-style: italic;
    color: var(--text-primary);
    border-left: 4px solid var(--accent);
    padding-left: 24px;
    margin: 0 0 60px;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.problem h3, .solution h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.problem p, .solution p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.text-link {
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

/* --- PRIMITIVES --- */
.primitives h2 {
    text-align: center;
    margin-bottom: 60px;
    font-size: 2rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 24px;
    border-radius: 8px;
    transition: transform 0.2s, border-color 0.2s;
}

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

.card h3 {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.tag {
    display: inline-block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    margin-bottom: 16px;
    font-weight: 600;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.card code {
    display: block;
    background: var(--code-bg);
    padding: 8px 12px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-primary);
}

/* --- EXAMPLES (TERMINAL) --- */
.examples h2 {
    text-align: center;
    margin-bottom: 16px;
}

.section-desc {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.terminal-window {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
}

.terminal-header {
    background: #161b22;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 8px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.red { background: #ff5f56; }
.yellow { background: #ffbd2e; }
.green { background: #27c93f; }

.terminal-body {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.command {
    margin-bottom: 8px;
}

.prompt {
    color: var(--accent);
    margin-right: 8px;
}

.input {
    color: var(--text-primary);
}

.comment {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-style: italic;
}

/* --- SOFTWARE NOT SERVICE --- */
.software-not-service {
    text-align: center;
}

.software-not-service h2 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.software-not-service p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.feature-list {
    list-style: none;
    max-width: 600px;
    margin: 0 auto 40px;
    text-align: left;
}

.feature-list li {
    margin-bottom: 24px;
    padding-left: 20px;
    border-left: 2px solid var(--accent);
}

.feature-list strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 4px;
}

/* --- PRICING --- */
.pricing h2 {
    text-align: center;
    margin-bottom: 60px;
    font-size: 2rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.price-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 32px;
    border-radius: 12px;
    position: relative;
    display: flex;
    flex-direction: column;
}

.price-card.featured {
    border-color: var(--accent);
    box-shadow: 0 0 40px var(--glow);
}

.badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--bg-color);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.price-card h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--accent);
}

.period {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.price-card ul {
    list-style: none;
    margin-bottom: 32px;
    flex-grow: 1;
}

.price-card li {
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.price-card li::before {
    content: "✓";
    color: var(--success);
    margin-right: 8px;
}

.button {
    display: block;
    width: 100%;
    padding: 12px;
    text-align: center;
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.2s;
}

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

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

.note {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 16px;
}

/* --- FOOTER --- */
footer {
    padding: 60px 0;
    border-top: 1px solid var(--border);
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 8px;
}

.footer-col a {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

.copyright {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }
}