/* Modern Serverless — cloud-native polish, geometric sans, soft gradient sky.
   Distinct from arcmailer's monospace dev-infra feel: this is the cloud-architect
   audience that wants the SaaS marketing feel done well. Personas 1 + 9. */
/* Design review: Theo Brindle-Suzuki. Brief: Stripe-Press calibre. Vertical rhythm on a
   single scale, Inter modern alternates, layered shadows, gradient text fallback. */

:root[data-site="modernserverless"] {
    --ms-bg: #f6f9fc;
    --ms-bg-alt: #ffffff;
    --ms-fg: #0f172a;
    --ms-muted: #475569;
    --ms-accent: #3b82f6;
    --ms-accent-2: #06b6d4;
    --ms-accent-deep: #1e40af;
    --ms-rule: #e2e8f0;
    --ms-radius: 12px;
    /* Vertical rhythm — every pad/margin should be a multiple. */
    --ms-rhythm: 8px;
    --ms-sans: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

html[data-site="modernserverless"], body { background: var(--ms-bg); color: var(--ms-fg); }
body {
    font-family: var(--ms-sans); margin: 0; line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    /* Inter's modern lowercase 'a' + ss01 single-storey alternates feel like 2026, not 1996. */
    font-feature-settings: "cv11", "ss01", "cv02", "ss03";
}

.ms-container { max-width: 1160px; margin: 0 auto; padding: 0 calc(var(--ms-rhythm) * 3); }

.ms-header {
    background: linear-gradient(180deg, #eaf3ff 0%, var(--ms-bg) 100%);
    padding: calc(var(--ms-rhythm) * 2) 0;
    border-bottom: 1px solid var(--ms-rule);
}
.ms-header .ms-container { display: flex; justify-content: space-between; align-items: center; }
.ms-brand { display: inline-flex; align-items: center; gap: calc(var(--ms-rhythm) * 1.25); text-decoration: none; color: var(--ms-fg); }
.ms-brand-mark {
    width: 22px; height: 22px;
    background:
        radial-gradient(circle at 30% 30%, var(--ms-accent-2), var(--ms-accent) 60%, var(--ms-accent-deep) 100%);
    border-radius: 6px;
    /* Theo: layered shadow — one tight contact, one soft cast. Stripe house style. */
    box-shadow:
        0 1px 2px rgba(15,23,42,.18),
        0 6px 16px rgba(59,130,246,.32);
}
.ms-brand-text strong { color: var(--ms-accent); font-weight: 700; }
.ms-nav a {
    color: var(--ms-muted); text-decoration: none;
    margin-left: calc(var(--ms-rhythm) * 3); font-weight: 500;
    transition: color .12s ease;
}
.ms-nav a:hover { color: var(--ms-fg); }
.ms-nav a:focus-visible, .ms-brand:focus-visible {
    outline: 2px solid var(--ms-accent); outline-offset: 4px; border-radius: 4px;
}
.ms-cta {
    background: var(--ms-fg); color: #fff !important;
    padding: calc(var(--ms-rhythm) * 1.25) calc(var(--ms-rhythm) * 2.25);
    border-radius: 999px;
    transition: background-color .12s ease, transform .12s ease;
}
.ms-cta:hover { background: #1e293b; }

.ms-main { padding: 0; }

/* Hero — vertical rhythm: 64 px top, 64 px bottom. No 4.5 rem oddness. */
.ms-hero { padding: calc(var(--ms-rhythm) * 8) 0 calc(var(--ms-rhythm) * 8); }
.ms-hero-grid {
    display: grid; grid-template-columns: 1.4fr 1fr;
    gap: calc(var(--ms-rhythm) * 5); align-items: center;
}
@media (max-width: 760px) { .ms-hero-grid { grid-template-columns: 1fr; } }

.ms-eyebrow {
    text-transform: uppercase; letter-spacing: .12em; font-size: .75rem;
    color: var(--ms-accent); margin: 0 0 var(--ms-rhythm); font-weight: 600;
    font-feature-settings: "tnum";
}

h1 { font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.05; margin: 0 0 var(--ms-rhythm); letter-spacing: -.02em; }
/* Theo: gradient text needs a non-transparent fallback for the Safari flash. */
h1 em {
    font-style: italic;
    color: var(--ms-accent);
    background: linear-gradient(120deg, var(--ms-accent), var(--ms-accent-2));
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}
@supports not (background-clip: text) {
    h1 em { -webkit-text-fill-color: currentColor; color: var(--ms-accent); }
}

.ms-lede { color: var(--ms-muted); font-size: 1.1rem; max-width: 52ch; }

.ms-actions { display: flex; gap: var(--ms-rhythm); margin-top: calc(var(--ms-rhythm) * 3); flex-wrap: wrap; }
.ms-btn {
    display: inline-block;
    padding: calc(var(--ms-rhythm) * 1.5) calc(var(--ms-rhythm) * 3);
    border-radius: 999px;
    text-decoration: none; font-weight: 600;
    border: 1.5px solid transparent;
    transition: transform .12s ease, box-shadow .15s ease, border-color .12s ease, background-color .12s ease;
}
.ms-btn-primary {
    background: var(--ms-accent); color: #fff;
    /* Theo: layered. Tight contact, soft cast. */
    box-shadow:
        0 1px 2px rgba(15,23,42,.18),
        0 8px 24px rgba(59,130,246,.32);
}
.ms-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow:
        0 1px 2px rgba(15,23,42,.18),
        0 12px 28px rgba(59,130,246,.42);
}
.ms-btn-ghost {
    color: var(--ms-fg); border-color: var(--ms-rule); background: var(--ms-bg-alt);
}
.ms-btn-ghost:hover { border-color: var(--ms-fg); }
.ms-btn:focus-visible { outline: 2px solid var(--ms-accent); outline-offset: 3px; }

.ms-hero-art { position: relative; min-height: 280px; perspective: 800px; }
.ms-cube {
    position: absolute; width: 110px; height: 110px; border-radius: 18px;
    background: linear-gradient(140deg, var(--ms-accent), var(--ms-accent-2));
    /* Layered shadow — Theo flagged the soft 50 px blur as too soufflé. */
    box-shadow:
        0 2px 4px rgba(15,23,42,.12),
        0 16px 36px rgba(59,130,246,.22);
}
.ms-cube-1 { left: 10%; top: 10%; transform: rotateX(20deg) rotateZ(15deg); }
.ms-cube-2 { left: 40%; top: 35%; transform: rotateX(20deg) rotateZ(-10deg); background: linear-gradient(140deg, #818cf8, var(--ms-accent)); }
.ms-cube-3 { left: 25%; top: 60%; transform: rotateX(20deg) rotateZ(8deg); background: linear-gradient(140deg, var(--ms-accent-2), #14b8a6); }

/* Pillars — 64 px top + bottom matches hero. Even rhythm down the page. */
.ms-pillars {
    background: var(--ms-bg-alt);
    padding: calc(var(--ms-rhythm) * 8) 0;
    border-top: 1px solid var(--ms-rule); border-bottom: 1px solid var(--ms-rule);
}
.ms-pillar-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: calc(var(--ms-rhythm) * 2);
}
.ms-pillar {
    background: var(--ms-bg);
    padding: calc(var(--ms-rhythm) * 3);
    border-radius: var(--ms-radius); border: 1px solid var(--ms-rule);
    transition: transform .15s ease, box-shadow .15s ease;
}
.ms-pillar:hover {
    transform: translateY(-2px);
    box-shadow:
        0 1px 2px rgba(15,23,42,.06),
        0 12px 24px rgba(15,23,42,.06);
}
.ms-pillar-num {
    font-family: ui-monospace, "SF Mono", monospace;
    color: var(--ms-accent); font-size: .8rem; letter-spacing: .12em;
    font-feature-settings: "tnum";
}
.ms-pillar h2 { margin: var(--ms-rhythm) 0; font-size: 1.25rem; letter-spacing: -.01em; }
.ms-pillar p { color: var(--ms-muted); margin: 0; }

::selection { background: rgba(59,130,246,.25); color: var(--ms-fg); }

.ms-footer {
    padding: calc(var(--ms-rhythm) * 5) 0 calc(var(--ms-rhythm) * 6);
    color: var(--ms-muted); font-size: .9rem;
}
.ms-footer-meta { display: flex; flex-wrap: wrap; gap: calc(var(--ms-rhythm) * 2); align-items: center; justify-content: space-between; margin-top: calc(var(--ms-rhythm) * 2); }
.ms-footer a { color: var(--ms-muted); text-decoration: none; }
.ms-footer a:hover { color: var(--ms-accent); }

.skip-to-content {
    position: absolute; left: -9999px;
    background: var(--ms-fg); color: #fff;
    padding: calc(var(--ms-rhythm) * 1.25) calc(var(--ms-rhythm) * 2);
    border-radius: 999px; font-weight: 600; z-index: 1000;
}
.skip-to-content:focus { left: calc(var(--ms-rhythm) * 2); top: calc(var(--ms-rhythm) * 2); }

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}