:root {
  --bg: #0b1020;
  --bg-alt: #0f1529;
  --surface: #141b33;
  --border: #232c4a;
  --text: #e6e9f2;
  --muted: #9aa3bd;
  --accent: #38bdf8;
  --accent-2: #a78bfa;
  --danger: #f87171;
  --radius: 14px;
  --max: 1160px;
  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.5rem, 6vw, 4.25rem); font-weight: 750; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.6rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 650; }
p { margin: 0 0 1em; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); }

.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 100;
  background: var(--accent); color: var(--bg); padding: 8px 14px; border-radius: 8px;
}
.skip-link:focus { top: 12px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: .98rem;
  color: #06101f; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: 1px solid transparent; transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: 0 8px 24px -8px rgba(56, 189, 248, .55); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); box-shadow: none; }
.btn-small { padding: 8px 14px; font-size: .9rem; }
.btn-large { padding: 15px 30px; font-size: 1.05rem; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 16, 32, .8);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid rgba(35, 44, 74, .6);
}
.nav { display: flex; align-items: center; gap: 24px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 1.2rem; letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 28px; height: 28px; }
.nav nav { margin-left: auto; }
.nav-links { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--muted); font-size: .95rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* Hero */
.hero {
  position: relative; overflow: hidden;
  padding: 88px 0 96px;
  background:
    radial-gradient(800px 400px at 85% 10%, rgba(167, 139, 250, .14), transparent 60%),
    radial-gradient(700px 500px at 10% 0%, rgba(56, 189, 248, .12), transparent 60%);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 75%);
}
.hero-grid { position: relative; display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.hero h1 {
  background: linear-gradient(180deg, #fff 30%, #b9c3e0);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { font-size: 1.15rem; color: var(--muted); max-width: 36em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 36px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: .8rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 18px;
}
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 rgba(56,189,248,.6); animation: pulse 2s infinite; }
@keyframes pulse {
  70% { box-shadow: 0 0 0 10px rgba(56,189,248,0); }
  100% { box-shadow: 0 0 0 0 rgba(56,189,248,0); }
}

.cloud-list { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 0; }
.cloud-list li {
  font-size: .85rem; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: 5px 12px;
  background: rgba(20, 27, 51, .6);
}

/* Hero visual */
.hero-visual { margin: 0; }
.hero-visual svg { width: 100%; height: auto; display: block; }
.hero-visual .orbit { fill: none; stroke: var(--border); stroke-dasharray: 3 6; }
.hero-visual .links path { stroke: url(#g-line); stroke-width: 1.5; fill: none; }
.hero-visual .links .faint { stroke: var(--border); stroke-dasharray: 2 5; }
.hero-visual .attack {
  fill: none; stroke: var(--danger); stroke-width: 2.5; stroke-linecap: round;
  stroke-dasharray: 8 10; animation: dash 1.6s linear infinite;
  filter: drop-shadow(0 0 6px rgba(248, 113, 113, .6));
}
@keyframes dash { to { stroke-dashoffset: -36; } }
.hero-visual .node rect { fill: var(--surface); stroke: var(--border); }
.hero-visual .node text { fill: var(--text); font: 600 14px var(--font); text-anchor: middle; }
.hero-visual .core circle { fill: var(--bg); stroke: var(--accent); stroke-width: 1.5; }
.hero-visual .alert rect { fill: rgba(248, 113, 113, .12); stroke: rgba(248, 113, 113, .55); }
.hero-visual .alert circle { fill: var(--danger); }
.hero-visual .alert text { fill: #fecaca; font: 600 12.5px var(--font); }

/* Problem band */
.band { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-alt); padding: 56px 0; }
.band-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; align-items: start; }
.band-lead { font-size: 1.45rem; font-weight: 600; line-height: 1.35; letter-spacing: -.01em; margin: 0; }
.band-grid p:last-child { color: var(--muted); margin: 0; }

/* Sections */
.section { padding: 104px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head p:last-child { color: var(--muted); font-size: 1.08rem; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: linear-gradient(180deg, var(--surface), rgba(20, 27, 51, .4));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; transition: border-color .2s ease, transform .2s ease;
}
.card:hover { border-color: rgba(56, 189, 248, .5); transform: translateY(-2px); }
.card p { color: var(--muted); margin: 0; font-size: .97rem; }
.card-icon {
  width: 44px; height: 44px; border-radius: 10px; margin-bottom: 18px;
  display: grid; place-items: center;
  background: rgba(56, 189, 248, .1); border: 1px solid rgba(56, 189, 248, .25);
}
.card-icon svg { width: 22px; height: 22px; fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* Steps */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: none; }
.steps li { position: relative; padding: 28px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--bg); }
.steps p { color: var(--muted); margin: 0; }
.step-num {
  display: block; font-size: .85rem; font-weight: 700; letter-spacing: .1em; margin-bottom: 14px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* Enterprise */
.enterprise-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.checklist li {
  position: relative; padding: 16px 18px 16px 52px;
  border: 1px solid var(--border); border-radius: 12px; background: var(--surface);
  color: var(--muted);
}
.checklist li strong { color: var(--text); font-weight: 600; }
.checklist li::before {
  content: ""; position: absolute; left: 18px; top: 50%; width: 20px; height: 20px; transform: translateY(-50%);
  border-radius: 50%; background: rgba(56, 189, 248, .15);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2338bdf8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 12 4 4 8-8'/%3E%3C/svg%3E");
  background-size: 12px; background-repeat: no-repeat; background-position: center;
}

/* CTA */
.cta {
  text-align: center;
  background:
    radial-gradient(600px 300px at 50% 0%, rgba(56, 189, 248, .14), transparent 70%),
    var(--bg-alt);
  border-top: 1px solid var(--border);
}
.cta-inner { max-width: 760px; }
.cta p { color: var(--muted); font-size: 1.1rem; margin-bottom: 32px; }
.cta .fine { font-size: .9rem; margin: 20px 0 0; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 32px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-inner p { margin: 0; color: var(--muted); font-size: .9rem; }

/* 404 */
.not-found { min-height: calc(100vh - 68px - 98px); display: grid; place-items: center; text-align: center; padding: 80px 0; }
.not-found .code {
  font-size: clamp(5rem, 16vw, 9rem); font-weight: 800; line-height: 1; margin: 0 0 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.not-found p { color: var(--muted); margin-bottom: 28px; }

/* Responsive */
@media (max-width: 960px) {
  .hero-grid, .band-grid, .enterprise-grid { grid-template-columns: 1fr; }
  .hero { padding: 64px 0 72px; }
  .hero-visual { max-width: 480px; margin: 0 auto; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .section { padding: 80px 0; }
}
@media (max-width: 680px) {
  .nav-links { display: none; }
  .nav nav { margin-left: auto; }
  .cards { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
}

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.nf-title { font-size: 2rem; }