:root {
  --bg: #0D1B36;
  --panel: #152A4F;
  --line: #1E3560;
  --accent: #22D3EE;
  --accent-dim: #123A66;
  --grad-start: #2C4A86;
  --grad-mid: #3B82F6;
  --grad-end: #22D3EE;
  --text: #F4F6F8;
  --text-dim: #8C99A8;
  --font-body: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: Menlo, "SF Mono", Consolas, monospace;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

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

a { color: inherit; text-decoration: none; }

.kicker {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-size: 0.8rem;
  margin: 0 0 12px;
}

h1, h2, h3 { font-weight: 700; margin: 0 0 16px; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); line-height: 1.1; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); line-height: 1.2; }
h3 { font-size: 1.15rem; margin-bottom: 10px; }
p { color: var(--text-dim); margin: 0 0 12px; }

.accent-text {
  background: linear-gradient(90deg, var(--grad-start), var(--grad-mid), var(--grad-end));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--line);
  transition: transform 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
}
.btn-primary {
  background: linear-gradient(90deg, var(--grad-start), var(--grad-mid), var(--grad-end));
  color: #0A1226;
  border: none;
}
.btn-ghost {
  background: transparent;
  color: var(--text);
}
.btn:hover { transform: translateY(-2px); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 27, 54, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand, .footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-mark { width: 34px; height: 34px; border-radius: 6px; }
.brand-word {
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  font-size: 0.95rem;
  font-weight: 700;
}
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.92rem;
}
.nav a:not(.nav-cta) { color: var(--text-dim); }
.nav a:hover { color: var(--text); }
.nav-cta {
  border: 1px solid var(--accent);
  color: var(--accent) !important;
  padding: 8px 16px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.nav-cta:hover { background: var(--accent); color: var(--bg) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
}

/* Hero */
.hero {
  padding: 120px 0 80px;
  position: relative;
  border-bottom: 1px solid var(--line);
}
.hero-inner { position: relative; }
.hero-sub { max-width: 640px; font-size: 1.05rem; }
.hero-actions { display: flex; gap: 16px; margin: 28px 0 24px; flex-wrap: wrap; }
.hero-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.hero-meta .dot { color: var(--accent); margin: 0 8px; }

/* Sections */
.section { padding: 88px 0; }
.section-panel { background: var(--panel); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.grid { display: grid; gap: 24px; margin-top: 36px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* Corner-bracket schematic motif */
.card, .panel-card, .fit-card {
  position: relative;
  border: 1px solid var(--line);
  padding: 28px 24px;
  background: rgba(21, 42, 79, 0.35);
}
.card::before, .card::after,
.panel-card::before, .panel-card::after,
.fit-card::before, .fit-card::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--accent);
  opacity: 0.7;
}
.card::before, .panel-card::before, .fit-card::before {
  top: -1px; left: -1px;
  border-top: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
}
.card::after, .panel-card::after, .fit-card::after {
  bottom: -1px; right: -1px;
  border-bottom: 2px solid var(--accent);
  border-right: 2px solid var(--accent);
}
.card-accent { background: rgba(18, 58, 102, 0.55); }
.card-index {
  display: block;
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.8rem;
  margin-bottom: 14px;
}
.card p, .panel-card p, .fit-card p { margin-bottom: 0; font-size: 0.95rem; }
.panel-card { background: rgba(13, 27, 54, 0.4); }
.fit-card { display: flex; align-items: center; background: rgba(21, 42, 79, 0.35); }
.fit-card p { color: var(--text); font-size: 1rem; }

/* Steps */
.steps { list-style: none; margin: 36px 0 0; padding: 0; display: flex; flex-direction: column; gap: 0; }
.steps li {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.steps li:first-child { border-top: 1px solid var(--line); }
.step-num {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 1.3rem;
  min-width: 48px;
}
.steps h3 { margin-bottom: 4px; }
.steps p { margin-bottom: 0; }

/* CTA */
.cta-section { text-align: center; }
.cta-inner { max-width: 640px; }
.cta-sub { font-size: 1.05rem; }
.contact-row { display: flex; gap: 16px; justify-content: center; margin-top: 24px; flex-wrap: wrap; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0;
}
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; }
.footer-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin: 4px 0 0;
}
.footer-copy { font-size: 0.8rem; color: var(--text-dim); margin: 0; }

/* Responsive */
@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .hero { padding: 56px 0 56px; }
  .nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px 28px;
    gap: 18px;
    display: none;
  }
  .nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .grid-4 { grid-template-columns: 1fr; }
  .steps li { gap: 16px; }
}