/* === GEON Landing Page (n8n, Elasticsearch, GDELT, OpenCTI) === */

:root {
    --color-bg: #0f1117;
    --color-bg-alt: #161822;
    --color-bg-card: #1c1f2e;
    --color-accent: #00d4aa;
    --color-accent-dim: rgba(0, 212, 170, 0.15);
    --color-text: #e4e6ef;
    --color-text-muted: #8b8fa3;
    --color-border: #2a2d3e;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;
    --max-width: 1100px;
    --radius: 8px;
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Header --- */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(15, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 32px;
    width: auto;
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    display: inline-block;
    padding: 8px 16px;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius);
    transition: color 0.2s, background-color 0.2s;
}

.nav-link:hover {
    color: var(--color-accent);
    background-color: var(--color-accent-dim);
}

/* --- Hero --- */

.hero {
    padding: 160px 0 100px;
    text-align: center;
}

.hero-tagline {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.hero-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    color: #fff;
}

.hero-description {
    font-size: 18px;
    color: var(--color-text-muted);
    max-width: 640px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius);
    transition: transform 0.15s, box-shadow 0.2s, background-color 0.2s;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-bg);
    box-shadow: 0 4px 20px rgba(0, 212, 170, 0.3);
}

.btn-primary:hover {
    background-color: #00e8bb;
    box-shadow: 0 6px 28px rgba(0, 212, 170, 0.4);
}

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

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

/* --- Section titles --- */

.section-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
    color: #fff;
}

/* --- Features --- */

.features {
    padding: 80px 0;
    background-color: var(--color-bg-alt);
}

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

.feature-card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: border-color 0.2s, transform 0.15s;
}

.feature-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.feature-icon {
    width: 40px;
    height: 40px;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #fff;
}

.feature-text {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* --- Data Sources --- */

.data-sources {
    padding: 80px 0;
}

.sources-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.source-badge {
    display: inline-block;
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--color-accent);
    background-color: var(--color-accent-dim);
    border: 1px solid rgba(0, 212, 170, 0.25);
    border-radius: 100px;
    white-space: nowrap;
}

/* --- Stack --- */

.stack {
    padding: 80px 0;
    background-color: var(--color-bg-alt);
}

.stack-subtitle {
    text-align: center;
    font-size: 16px;
    color: var(--color-text-muted);
    margin-top: -32px;
    margin-bottom: 48px;
    letter-spacing: 1px;
}

.stack-subtitle strong {
    color: var(--color-accent);
    font-weight: 700;
}

.stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}

.stack-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.stack-name {
    font-weight: 600;
    font-size: 14px;
    color: #fff;
}

.stack-role {
    font-size: 13px;
    color: var(--color-text-muted);
}

/* --- Footer --- */

.footer {
    padding: 32px 0;
    border-top: 1px solid var(--color-border);
}

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

.footer-text {
    font-size: 14px;
    color: var(--color-text-muted);
}

.footer-link {
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity 0.2s;
}

.footer-link:hover {
    opacity: 0.8;
}

.github-link {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-muted);
}

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

.github-link svg {
    fill: currentColor;
}

/* --- Responsive --- */

@media (max-width: 768px) {
    .hero {
        padding: 120px 0 60px;
    }

    .hero-description {
        font-size: 16px;
    }

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

    .stack-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav {
        gap: 4px;
    }

    .nav-link {
        padding: 6px 10px;
        font-size: 13px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        text-align: center;
    }
}