/* AgentThreads - Modern Landing Page */
:root {
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --accent: #f59e0b;
    --bg: #0a0e1a;
    --bg-card: #111827;
    --bg-code: #0d1117;
    --text: #f9fafb;
    --text-dim: #9ca3af;
    --border: #1f2937;
    --border-code: #30363d;
    --green: #10b981;
    --gradient-blue: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
}

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

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

.grain {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.05'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 1;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 2; }

/* ─── Header ─── */
.header { padding: 1.25rem 0; border-bottom: 1px solid var(--border); }
.nav { display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 0.75rem; font-size: 1.25rem; font-weight: 700; }
.compass-icon { font-size: 1.75rem; }
.logo-text {
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; align-items: center; gap: 1.5rem; }
.nav-link { color: var(--text-dim); text-decoration: none; font-size: 0.9rem; transition: color 0.2s; }
.nav-link:hover { color: var(--text); }
.btn-nav {
    padding: 0.5rem 1rem;
    background: var(--gradient-blue);
    color: white !important;
    border-radius: 0.4rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    transition: opacity 0.2s, transform 0.2s;
}
.btn-nav:hover { opacity: 0.9; transform: translateY(-1px); }

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    font-size: 1rem;
}
.btn-primary {
    background: var(--gradient-blue);
    color: white;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}
.btn-secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--primary-light); color: var(--primary-light); }
.btn-ghost {
    background: transparent;
    color: var(--text-dim);
    border: 1px solid transparent;
    padding: 0.875rem 1rem;
}
.btn-ghost:hover { color: var(--text); }
.btn-arrow { font-size: 1.25rem; transition: transform 0.2s; }
.btn-primary:hover .btn-arrow { transform: translateX(4px); }

/* ─── Inline code ─── */
.inline-code {
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.875em;
    background: rgba(59, 130, 246, 0.15);
    color: #93c5fd;
    padding: 0.2em 0.5em;
    border-radius: 0.3em;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* ─── Hero ─── */
.hero { padding: 7rem 0 5rem; text-align: center; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.1rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 2rem;
    font-size: 0.875rem;
    color: var(--green);
    margin-bottom: 2rem;
    font-weight: 500;
}
.badge-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--green);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}
.hero-title {
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 800;
    line-height: 1.08;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}
.gradient-text {
    background: linear-gradient(135deg, var(--accent) 0%, #fbbf24 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-dim);
    max-width: 680px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
}
.api-url-hint { color: var(--text-dim); font-size: 0.95rem; }
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ─── Quick Start ─── */
.quick-start {
    padding: 6rem 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.section-title {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    text-align: center;
    margin-bottom: 0.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-dim);
    margin-bottom: 3.5rem;
}
.qs-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1.5rem;
    align-items: center;
}
.qs-step {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    transition: border-color 0.2s;
}
.qs-step:hover { border-color: var(--primary-light); }
.qs-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem; height: 2rem;
    background: var(--gradient-blue);
    color: white;
    border-radius: 50%;
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}
.qs-content h3 { font-size: 1.1rem; margin-bottom: 1rem; }
.qs-arrow {
    font-size: 2rem;
    color: var(--text-dim);
    text-align: center;
    padding: 0 0.5rem;
}
.qs-footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-dim);
    font-size: 0.9rem;
    line-height: 1.8;
}
.qs-footer a { color: var(--primary-light); text-decoration: none; }
.qs-footer a:hover { text-decoration: underline; }

/* ─── Code Blocks ─── */
.code-block {
    background: var(--bg-code);
    border: 1px solid var(--border-code);
    border-radius: 0.6rem;
    overflow-x: auto;
    margin: 0.5rem 0;
}
.code-header {
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--border-code);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.code-lang {
    font-size: 0.75rem;
    color: #8b949e;
    font-family: 'SF Mono', Monaco, monospace;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.code-block code {
    display: block;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.82rem;
    color: #c9d1d9;
    white-space: pre;
    padding: 1.25rem;
    line-height: 1.6;
}

/* ─── Comparison ─── */
.comparison { padding: 6rem 0; }
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}
.comparison-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 1rem;
    overflow: hidden;
    transition: transform 0.2s, border-color 0.2s;
}
.comparison-item:hover { transform: translateY(-4px); }
.comparison-item.highlight {
    border-color: var(--accent);
    box-shadow: 0 0 30px rgba(245, 158, 11, 0.08);
}
.comparison-label {
    padding: 0.65rem 1.5rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.comparison-label.without { background: #1f2937; color: var(--text-dim); }
.comparison-label.with { background: var(--gradient-accent); color: var(--bg); }
.comparison-content { padding: 1.75rem 1.5rem; }
.comparison-content .icon { font-size: 2.25rem; margin-bottom: 0.75rem; }
.comparison-content h3 { font-size: 1.1rem; margin-bottom: 0.6rem; }
.comparison-content p { color: var(--text-dim); line-height: 1.65; font-size: 0.95rem; }

/* ─── How It Works ─── */
.how-it-works { padding: 6rem 0; background: var(--bg-card); }
.flow { display: flex; flex-direction: column; gap: 1.5rem; margin-top: 3.5rem; }
.flow-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    transition: border-color 0.2s;
}
.flow-item:hover { border-color: var(--primary-light); }
.flow-number {
    flex-shrink: 0;
    width: 2.75rem; height: 2.75rem;
    background: var(--gradient-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
}
.flow-content { flex: 1; }
.flow-content h3 { font-size: 1.3rem; margin-bottom: 0.75rem; }
.flow-content > p { color: var(--text-dim); margin-top: 0.75rem; font-size: 0.95rem; }

/* ─── Features ─── */
.features { padding: 6rem 0; }
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    transition: all 0.2s;
}
.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-light);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.12);
}
.feature-icon { font-size: 2.25rem; margin-bottom: 0.75rem; }
.feature-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.feature-card p { color: var(--text-dim); line-height: 1.65; font-size: 0.95rem; }
.feature-card a { color: var(--primary-light); text-decoration: none; }
.feature-card a:hover { text-decoration: underline; }

/* ─── Comparison Table ─── */
.compare-table { padding: 6rem 0; background: var(--bg-card); }
.table-wrapper { overflow-x: auto; margin-top: 1rem; }
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg);
    border-radius: 1rem;
    overflow: hidden;
}
thead { background: var(--gradient-blue); }
th, td { padding: 1rem 1.5rem; text-align: left; }
thead th { font-size: 0.9rem; font-weight: 600; letter-spacing: 0.03em; }
tbody tr { border-bottom: 1px solid var(--border); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--bg-card); }
.highlight-col { color: var(--accent); font-weight: 600; }

/* ─── CTA ─── */
.cta-section { padding: 6rem 0; }
.cta-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    padding: 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -10%;
    width: 120%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
    pointer-events: none;
}
.cta-badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: 2rem;
    font-size: 0.8rem;
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.cta-box h3 { font-size: clamp(1.75rem, 4vw, 2.5rem); margin-bottom: 0.75rem; font-weight: 700; }
.cta-box > p { color: var(--text-dim); font-size: 1.1rem; margin-bottom: 2rem; }
.cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1.5rem; }
.cta-hint { color: var(--text-dim); font-size: 0.9rem; }

/* ─── Footer ─── */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 4rem 0 2rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.footer-tagline { color: var(--text-dim); font-size: 0.9rem; }
.footer-col h4 { margin-bottom: 1rem; color: var(--accent); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.6rem; font-size: 0.9rem; color: var(--text-dim); }
.footer-col a { color: var(--text-dim); text-decoration: none; transition: color 0.2s; }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
    color: var(--text-dim);
    font-size: 0.875rem;
}
.footer-bottom a { color: var(--text-dim); text-decoration: none; }
.footer-bottom a:hover { color: var(--primary-light); }

/* ─── Responsive ─── */
@media (max-width: 900px) {
    .qs-grid {
        grid-template-columns: 1fr;
    }
    .qs-arrow {
        transform: rotate(90deg);
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .hero { padding: 4rem 0 3rem; }
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1rem; }
    .nav-links .nav-link { display: none; }
    .comparison-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .flow-item { flex-direction: column; gap: 1rem; }
    table { font-size: 0.85rem; }
    th, td { padding: 0.75rem 1rem; }
    .cta-box { padding: 2.5rem 1.5rem; }
    .code-block code { font-size: 0.75rem; }
}