:root {
  --bg: #0b1220;
  --bg-elev: #111c2f;
  --surface: #16243d;
  --border: #1f3358;
  --text: #e7eef9;
  --text-dim: #94a3b8;
  --text-muted: #64748b;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --accent-text: #0b1220;
  --slate: #1e293b;
  --success: #22c55e;
  --warn: #f59e0b;
  --max: 1120px;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.25);
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4 { color: var(--text); line-height: 1.2; margin: 0 0 .5em; font-weight: 700; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 4vw + 1rem, 3.5rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 2vw + .8rem, 2.25rem); margin-top: 2em; }
h3 { font-size: 1.25rem; margin-top: 1.5em; }
p { margin: 0 0 1em; color: var(--text-dim); }
p.lead { font-size: 1.15rem; color: var(--text); max-width: 60ch; }

ul, ol { padding-left: 1.25em; color: var(--text-dim); }
li { margin-bottom: .35em; }

code { font-family: var(--mono); font-size: .9em; background: var(--surface); padding: .15em .4em; border-radius: 4px; color: var(--text); }

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

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 18, 32, .85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 36px; height: 36px; object-fit: contain; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav a { color: var(--text-dim); font-size: .95rem; font-weight: 500; }
.nav a:hover { color: var(--text); text-decoration: none; }
.nav a.nav-cta { display: inline-flex; align-items: center; padding: 8px 16px; border-radius: 8px; background: var(--accent); color: var(--accent-text); font-weight: 600; }
.nav a.nav-cta:hover { background: var(--accent-strong); color: var(--accent-text); text-decoration: none; }

@media (max-width: 720px) {
  .nav a:not(.nav-cta) { display: none; }
}

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: 1rem; border: 1px solid transparent; cursor: pointer; transition: transform .04s ease, background .15s ease; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-primary:hover { background: var(--accent-strong); color: var(--accent-text); }
.btn-secondary { background: transparent; color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--surface); color: var(--text); }
.btn-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* Hero */
.hero { padding: 80px 0 48px; }
.hero h1 { max-width: 18ch; }
.hero .lead { margin: 1em 0 1.5em; max-width: 56ch; }
.eyebrow { display: inline-block; padding: 4px 12px; border-radius: 999px; background: var(--surface); color: var(--accent); font-size: .82rem; font-weight: 600; letter-spacing: .03em; margin-bottom: 1.25em; border: 1px solid var(--border); }

/* Hero slider */
.hero-slider {
  position: relative;
  margin-top: 56px;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: #f3f5f8;
  box-shadow: var(--shadow);
  overflow: hidden;
  outline: none;
}
.hero-slider:focus-visible { box-shadow: var(--shadow), 0 0 0 3px var(--accent); }

.hero-slider-viewport {
  width: 100%;
  aspect-ratio: 1440 / 735;
  overflow: hidden;
}
.hero-slider-track {
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform .35s cubic-bezier(.4, 0, .2, 1);
  will-change: transform;
}
.hero-slide {
  flex: 0 0 100%;
  margin: 0;
  position: relative;
  display: flex;
  flex-direction: column;
}
.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  cursor: zoom-in;
  user-select: none;
  -webkit-user-drag: none;
  transform-origin: 50% 50%;
  transition: transform .25s cubic-bezier(.4, 0, .2, 1);
  will-change: transform;
}
.hero-slide.is-zoomed img {
  transform: scale(2.8);
  transition: transform .12s linear;
}
.hero-slide figcaption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(11, 18, 32, 0.78);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .01em;
  pointer-events: none;
  backdrop-filter: blur(6px);
}

/* Slider arrows */
.hero-slider-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: rgba(11, 18, 32, 0.78);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  z-index: 5;
  transition: background .12s ease, transform .08s ease;
  backdrop-filter: blur(6px);
}
.hero-slider-nav:hover { background: rgba(11, 18, 32, 0.95); }
.hero-slider-nav:active { transform: translateY(-50%) scale(0.96); }
.hero-slider-nav.prev { left: 12px; }
.hero-slider-nav.next { right: 12px; }
.hero-slider-nav:disabled { opacity: 0.4; cursor: default; }

/* Dots */
.hero-slider-dots {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 5;
}
.hero-slider-dots button {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  padding: 0;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: transform .12s ease, background .12s ease;
}
.hero-slider-dots button:hover { background: rgba(255, 255, 255, 0.8); }
.hero-slider-dots button[aria-selected="true"] {
  background: var(--accent);
  transform: scale(1.3);
}

/* Zoom hint */
.hero-slider-zoom-hint {
  position: absolute;
  top: 14px;
  right: 14px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(11, 18, 32, 0.6);
  color: var(--text);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .02em;
  pointer-events: none;
  backdrop-filter: blur(6px);
  z-index: 5;
}

@media (max-width: 600px) {
  .hero-slider-nav { width: 36px; height: 36px; }
  .hero-slide figcaption { font-size: 11px; padding: 4px 10px; left: 10px; bottom: 10px; }
  .hero-slider-zoom-hint { display: none; }
}


/* Sections */
section { padding: 64px 0; }
section.alt { background: var(--bg-elev); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 60ch; margin: 0 auto 40px; text-align: center; }
.section-head h2 { margin-top: 0; }
.section-head p { font-size: 1.05rem; }

/* Trust strip */
.trust { padding: 24px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-elev); }
.trust p { margin: 0; text-align: center; color: var(--text-muted); font-size: .92rem; }

/* Feature grid */
.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 880px) { .grid-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.card h3 { margin-top: 0; font-size: 1.1rem; }
.card p { margin-bottom: 0; font-size: .95rem; }

/* Use-case rows */
.use-case { padding: 32px 0; border-top: 1px solid var(--border); }
.use-case:first-child { border-top: 0; }
.use-case h3 { margin-top: 0; color: var(--accent); font-size: 1.15rem; letter-spacing: .02em; text-transform: uppercase; }

/* FAQ */
.faq details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 16px 20px;
  margin-bottom: 12px;
}
.faq details[open] { background: var(--bg-elev); }
.faq summary { cursor: pointer; font-weight: 600; color: var(--text); list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; float: right; color: var(--text-muted); font-size: 1.2rem; }
.faq details[open] summary::after { content: "−"; }
.faq p { margin: 12px 0 0; }

/* Final CTA */
.cta-band { padding: 72px 0; text-align: center; }
.cta-band h2 { margin-top: 0; }
.cta-band p { max-width: 50ch; margin-left: auto; margin-right: auto; }
.cta-band .btn-row { justify-content: center; margin-top: 20px; }

/* Footer */
.site-footer { padding: 48px 0 32px; border-top: 1px solid var(--border); background: var(--bg-elev); color: var(--text-muted); font-size: .92rem; }
.site-footer .container { display: grid; gap: 32px; grid-template-columns: 1.4fr 1fr 1fr 1fr; }
.site-footer h4 { font-size: .85rem; color: var(--text); text-transform: uppercase; letter-spacing: .05em; margin: 0 0 12px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: var(--text-dim); }
.site-footer a:hover { color: var(--text); }
.footer-bottom { max-width: var(--max); margin: 32px auto 0; padding: 16px 24px 0; border-top: 1px solid var(--border); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: .85rem; color: var(--text-muted); }
@media (max-width: 720px) { .site-footer .container { grid-template-columns: 1fr 1fr; } }

/* Long-form prose pages (about, security, guides) */
.prose { max-width: 70ch; margin: 0 auto; padding: 48px 0; }
.prose h1 { font-size: 2.25rem; }
.prose h2 { margin-top: 1.6em; }
.prose ul li, .prose ol li { color: var(--text-dim); }
.prose blockquote { border-left: 3px solid var(--accent); margin: 1.5em 0; padding: .25em 0 .25em 1.25em; color: var(--text-dim); font-style: italic; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: .95rem; }
.prose th, .prose td { padding: 10px 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.prose th { color: var(--text); font-weight: 600; }
.prose td { color: var(--text-dim); }

/* Skip link for accessibility */
.skip { position: absolute; left: -9999px; top: 0; }
.skip:focus { position: fixed; left: 16px; top: 16px; padding: 10px 14px; background: var(--accent); color: var(--accent-text); border-radius: 6px; z-index: 100; }