:root {
  --bg: #070b14;
  --bg-alt: #0c1220;
  --card: #111a2e;
  --card-hover: #16213a;
  --border: #1e2a45;
  --text: #e6ecf7;
  --muted: #8b98b3;
  --accent: #4f7cff;
  --accent2: #38e1c6;
  --green: #34d399;
  --red: #f87171;
  --grad: linear-gradient(120deg, #4f7cff, #38e1c6);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; }

/* ---------- Nav ---------- */
nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 6vw;
  background: rgba(7,11,20,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.logo { font-weight: 800; font-size: 1.15rem; color: var(--text); letter-spacing: -.02em; }
.logo span { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--muted); font-size: .95rem; font-weight: 500; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a.cta {
  background: var(--grad); color: #04101c; padding: 8px 18px;
  border-radius: 8px; font-weight: 700;
}
.hamburger { display: none; background: none; border: none; color: var(--text); font-size: 1.6rem; cursor: pointer; }

/* ---------- Layout ---------- */
.container { max-width: 1100px; margin: 0 auto; padding: 0 6vw; }
section { padding: 72px 0; }
.hero {
  padding: 110px 0 90px;
  background:
    radial-gradient(ellipse 60% 50% at 70% 0%, rgba(79,124,255,.18), transparent),
    radial-gradient(ellipse 50% 40% at 20% 10%, rgba(56,225,198,.10), transparent);
  text-align: center;
}
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 800; letter-spacing: -.03em; line-height: 1.15; }
.hero h1 .grad, .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero p.sub { max-width: 640px; margin: 22px auto 0; color: var(--muted); font-size: 1.15rem; }
.hero .actions { margin-top: 36px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 13px 28px; border-radius: 10px;
  font-weight: 700; font-size: 1rem; cursor: pointer; border: none; transition: transform .15s, box-shadow .15s;
}
.btn-primary { background: var(--grad); color: #04101c; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,124,255,.35); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); }

h2.section-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -.02em; margin-bottom: 12px; }
p.section-sub { color: var(--muted); max-width: 620px; margin-bottom: 40px; }
.center { text-align: center; }
.center p.section-sub { margin-left: auto; margin-right: auto; }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 28px; transition: border-color .2s, transform .2s;
}
.card:hover { border-color: #2c3d63; transform: translateY(-3px); }
.card .icon { font-size: 1.8rem; margin-bottom: 14px; display: block; }
.card h3 { font-size: 1.15rem; margin-bottom: 10px; font-weight: 700; }
.card p { color: var(--muted); font-size: .95rem; }
.card ul { color: var(--muted); font-size: .95rem; padding-left: 18px; margin-top: 10px; }
.card ul li { margin-bottom: 6px; }

/* ---------- Chips / badges ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  background: rgba(79,124,255,.12); border: 1px solid rgba(79,124,255,.3);
  color: #9db8ff; padding: 5px 14px; border-radius: 999px; font-size: .82rem; font-weight: 600;
}
.badge { display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: .78rem; font-weight: 700; }
.badge-green { background: rgba(52,211,153,.15); color: var(--green); border: 1px solid rgba(52,211,153,.35); }
.badge-blue { background: rgba(79,124,255,.15); color: #9db8ff; border: 1px solid rgba(79,124,255,.35); }
.badge-amber { background: rgba(251,191,36,.15); color: #fbbf24; border: 1px solid rgba(251,191,36,.35); }

/* ---------- Banner / strip ---------- */
.strip {
  background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
.demo-banner {
  background: rgba(251,191,36,.1); border: 1px solid rgba(251,191,36,.35);
  color: #fbd876; border-radius: 10px; padding: 12px 20px; font-size: .92rem; margin-bottom: 32px;
}

/* ---------- Tables ---------- */
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--border); font-size: .95rem; }
th { color: var(--muted); font-weight: 600; font-size: .82rem; text-transform: uppercase; letter-spacing: .05em; }
tr:hover td { background: rgba(79,124,255,.04); }

/* ---------- Forms ---------- */
input, select, textarea {
  width: 100%; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text); padding: 12px 14px; font-size: .98rem; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
label { display: block; font-size: .88rem; font-weight: 600; color: var(--muted); margin: 16px 0 6px; }

/* ---------- Modal ---------- */
.modal-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.65);
  z-index: 200; align-items: center; justify-content: center; padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 32px; max-width: 460px; width: 100%; position: relative;
}
.modal .close { position: absolute; top: 14px; right: 18px; background: none; border: none; color: var(--muted); font-size: 1.4rem; cursor: pointer; }

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 8px; margin-bottom: 32px; flex-wrap: wrap; }
.tab-btn {
  background: var(--card); border: 1px solid var(--border); color: var(--muted);
  padding: 10px 22px; border-radius: 10px; font-weight: 600; font-size: .95rem; cursor: pointer; transition: all .2s;
}
.tab-btn.active { background: var(--grad); color: #04101c; border-color: transparent; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 18px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 22px; }
.stat .num { font-size: 1.7rem; font-weight: 800; letter-spacing: -.02em; }
.stat .lbl { color: var(--muted); font-size: .85rem; margin-top: 4px; }

/* ---------- Timeline / steps ---------- */
.steps { counter-reset: step; }
.step { display: flex; gap: 20px; margin-bottom: 34px; }
.step .n {
  flex: 0 0 44px; height: 44px; border-radius: 12px; background: var(--grad); color: #04101c;
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 1.1rem;
}
.step h3 { margin-bottom: 6px; }
.step p { color: var(--muted); font-size: .96rem; }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--border); padding: 40px 6vw; margin-top: 40px; }
.footer-inner { max-width: 1100px; margin: 0 auto; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; color: var(--muted); font-size: .9rem; }
.footer-inner a { color: var(--muted); margin-right: 18px; }
.footer-inner a:hover { color: var(--text); }

/* ---------- Prose (case study) ---------- */
.prose h2 { font-size: 1.5rem; margin: 46px 0 14px; letter-spacing: -.02em; }
.prose h3 { font-size: 1.15rem; margin: 28px 0 10px; }
.prose p { color: #b7c2d8; margin-bottom: 16px; }
.prose ul { color: #b7c2d8; padding-left: 22px; margin-bottom: 16px; }
.prose ul li { margin-bottom: 8px; }
.prose .meta { color: var(--muted); font-size: .95rem; margin-bottom: 26px; }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .nav-links {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; background: var(--bg-alt); padding: 20px 6vw;
    border-bottom: 1px solid var(--border); gap: 18px; align-items: flex-start;
  }
  .nav-links.open { display: flex; }
  .hamburger { display: block; }
  section { padding: 52px 0; }
  .hero { padding: 70px 0 60px; }
  th, td { padding: 10px 8px; font-size: .85rem; }
}