:root {
    --c-bg: #f5f7fb;
    --c-surface: #ffffff;
    --c-ink: #1f2a40;
    --c-muted: #4a5a75;
    --c-accent: #1b6ec2;
    --c-accent-ink: #ffffff;
    --c-border: #dbe0ea;
    --shadow: 0 1px 2px rgba(20, 30, 60, 0.04), 0 4px 16px rgba(20, 30, 60, 0.06);
}

* { box-sizing: border-box; }
html, body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: var(--c-ink);
    background: var(--c-bg);
    line-height: 1.55;
}

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

code {
    background: rgba(27, 110, 194, 0.08);
    padding: 0.05em 0.35em;
    border-radius: 0.25rem;
    font-family: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
    font-size: 0.93em;
    color: #0a3a73;
}
pre {
    background: #0f1729;
    color: #d3deef;
    padding: 0.85rem 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    font-size: 0.9rem;
}
pre code {
    background: none;
    color: inherit;
    padding: 0;
}

.container { max-width: 70rem; margin: 0 auto; padding: 0 1.25rem; }

.topbar {
    background: var(--c-ink);
    color: #fff;
    padding: 0.85rem 0;
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: var(--shadow);
}
.topbar a { color: #fff; }
.topbar-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.brand {
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.01em;
}
.topbar nav {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.45rem 0.95rem;
    border-radius: 0.4rem;
    font-weight: 500;
    border: 1px solid transparent;
    transition: background 0.15s, border 0.15s;
    cursor: pointer;
}
.btn-primary {
    background: var(--c-accent);
    color: var(--c-accent-ink);
}
.btn-primary:hover {
    background: #1057a0;
    text-decoration: none;
    color: #fff;
}
.btn-ghost {
    background: transparent;
    color: var(--c-accent);
    border-color: var(--c-accent);
}
.btn-ghost:hover {
    background: rgba(27, 110, 194, 0.08);
    text-decoration: none;
}
.btn-lg { padding: 0.65rem 1.4rem; font-size: 1.05rem; }

.hero {
    padding: 4rem 0 3rem;
    background: linear-gradient(180deg, #fff 0%, var(--c-bg) 100%);
}
.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 2.5rem;
    align-items: center;
}
.hero h1 {
    font-size: clamp(2rem, 4vw + 1rem, 3.4rem);
    margin: 0 0 1rem;
    line-height: 1.1;
}
.hero .lead {
    font-size: 1.2rem;
    color: var(--c-muted);
    max-width: 48rem;
    margin: 0 0 2rem;
}
.hero-art {
    display: flex;
    justify-content: center;
}
.hero-art img {
    width: 100%;
    max-width: 22rem;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(20, 30, 60, 0.18));
}
@media (max-width: 48rem) {
    .hero-grid { grid-template-columns: 1fr; }
    .hero-art { order: -1; }
    .hero-art img { max-width: 12rem; }
}
.cta { display: flex; gap: 0.75rem; flex-wrap: wrap; }

.section {
    padding: 3rem 0;
}
.section-alt {
    background: #fff;
    border-top: 1px solid var(--c-border);
    border-bottom: 1px solid var(--c-border);
}
.section h2 {
    font-size: 1.7rem;
    margin: 0 0 1.5rem;
}

.section-lead {
    color: var(--c-muted);
    font-size: 1.05rem;
    margin: -0.5rem 0 1.75rem;
    max-width: 44rem;
}
.features {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
}
.features-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
@media (max-width: 60rem) {
    .features-3 { grid-template-columns: 1fr; }
}
.card {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 0.65rem;
    padding: 1.25rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}
.card h3 {
    margin: 0 0 0.5rem;
    font-size: 1.1rem;
}
.card p { color: var(--c-muted); margin: 0 0 0.85rem; }
.card pre { margin-top: auto; }
.card-head {
    border-bottom: 1px solid var(--c-border);
    padding-bottom: 0.6rem;
    margin-bottom: 0.75rem;
}
.card-kicker {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--c-accent);
    margin-bottom: 0.2rem;
}
.card-agent h3 {
    font-family: 'JetBrains Mono', 'Menlo', 'Consolas', monospace;
    font-size: 1.15rem;
    margin: 0;
}

.bullets { padding-left: 1.2rem; }
.bullets li { margin: 0.4rem 0; }

footer {
    border-top: 1px solid var(--c-border);
    padding: 1.5rem 0;
    color: var(--c-muted);
    font-size: 0.92rem;
}
.footer-row {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}