:root {
  --thermal: #0b1020;
  --surface: #151b2e;
  --surface-2: #1a2238;
  --ink: #f4f7ff;
  --ink-muted: rgba(244, 247, 255, 0.68);
  --hairline: #384261;
  --cyan: #3dd6c6;
  --amber: #ffb020;
  --violet: #8b7cff;
  --blue: #4f8cff;
  --register: #ff6b4a;
  --glow-cyan: rgba(61, 214, 198, 0.22);
  --glow-violet: rgba(139, 124, 255, 0.28);
  --glow-red: rgba(255, 107, 74, 0.18);
  --radius: 16px;
  --font: "Outfit", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --pad: clamp(1.25rem, 4vw, 2rem);
  --max: 1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--thermal);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--cyan);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.mono {
  font-family: var(--mono);
}

.wrap {
  width: min(100% - 2 * var(--pad), var(--max));
  margin-inline: auto;
}

.bg-glow {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 45% at 15% -10%, var(--glow-violet), transparent 60%),
    radial-gradient(ellipse 55% 40% at 90% 10%, var(--glow-cyan), transparent 55%),
    radial-gradient(ellipse 50% 35% at 70% 85%, var(--glow-red), transparent 60%),
    var(--thermal);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(11, 16, 32, 0.78);
  border-bottom: 1px solid rgba(56, 66, 97, 0.65);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background:
    linear-gradient(145deg, var(--cyan), transparent 55%),
    linear-gradient(320deg, var(--register), var(--violet));
  box-shadow: 0 0 18px var(--glow-cyan);
}

.brand-sub {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.site-nav a {
  color: var(--ink-muted);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--ink);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  background: var(--surface);
  padding: 0;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.25rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-sm {
  min-height: 40px;
  padding: 0.45rem 0.9rem;
  font-size: 0.88rem;
}

.btn-primary {
  color: #0b1020;
  background: linear-gradient(135deg, var(--cyan), #7aefe4 45%, var(--blue));
  box-shadow: 0 0 24px var(--glow-cyan);
}

.btn-ghost {
  color: var(--ink);
  background: transparent;
  border-color: var(--hairline);
}

.btn-ghost:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 18px var(--glow-cyan);
}

.hero {
  padding: clamp(2.5rem, 8vw, 5rem) 0 3rem;
  display: grid;
  gap: 1.25rem;
}

.eyebrow {
  margin: 0;
  color: var(--cyan);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.1rem, 6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 14ch;
}

.subtitle {
  margin: 0;
  font-size: clamp(1.15rem, 3vw, 1.45rem);
  color: var(--amber);
  font-weight: 600;
}

.lede {
  margin: 0;
  max-width: 38rem;
  color: var(--ink-muted);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.receipt-card {
  margin-top: 1.5rem;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow:
    0 0 0 1px rgba(61, 214, 198, 0.08),
    0 20px 50px rgba(0, 0, 0, 0.35),
    0 0 40px var(--glow-violet);
  overflow: hidden;
}

.receipt-edge {
  height: 10px;
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0 8px,
      rgba(11, 16, 32, 0.85) 8px 14px
    );
  opacity: 0.55;
}

.receipt-body {
  margin: 0;
  padding: 1.1rem 1.25rem;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--ink-muted);
  white-space: pre-wrap;
}

.section {
  padding: clamp(2.5rem, 7vw, 4.5rem) 0;
}

.section-head {
  margin-bottom: 1.75rem;
  max-width: 40rem;
}

.section-head h2 {
  margin: 0.35rem 0 0.6rem;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  letter-spacing: -0.02em;
}

.section-copy {
  margin: 0;
  color: var(--ink-muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  background: linear-gradient(165deg, var(--surface-2), var(--surface));
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 1.25rem 1.3rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.feature-grid .card:hover {
  border-color: rgba(61, 214, 198, 0.45);
  box-shadow: 0 0 28px var(--glow-cyan);
}

.card-index {
  display: inline-block;
  margin-bottom: 0.65rem;
  color: var(--violet);
  font-size: 0.78rem;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.96rem;
}

.about-panel {
  display: grid;
  gap: 1rem;
}

.about-panel p {
  margin: 0;
  color: var(--ink-muted);
}

.disclaimer {
  padding-top: 0.75rem;
  border-top: 1px solid var(--hairline);
  font-size: 0.9rem;
  color: rgba(244, 247, 255, 0.55);
}

.prose {
  display: grid;
  gap: 0.85rem;
}

.prose h3 {
  margin: 0.6rem 0 0;
  font-size: 1.05rem;
  color: var(--cyan);
}

.prose p,
.prose li {
  color: var(--ink-muted);
}

.prose ul {
  margin: 0;
  padding-left: 1.15rem;
}

.prose a {
  color: var(--amber);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.contact-card {
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.contact-card:hover {
  text-decoration: none;
  border-color: rgba(255, 176, 32, 0.55);
  box-shadow: 0 0 24px rgba(255, 176, 32, 0.15);
}

.contact-card strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 1.02rem;
  word-break: break-word;
}

.site-footer {
  border-top: 1px solid var(--hairline);
  padding: 1.5rem 0 2.5rem;
  margin-top: 1rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links a {
  color: var(--ink-muted);
}

.footer-links a:hover {
  color: var(--cyan);
}

@media (max-width: 900px) {
  .feature-grid,
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: var(--pad);
    right: var(--pad);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: rgba(21, 27, 46, 0.98);
    border: 1px solid var(--hairline);
    border-radius: var(--radius);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    padding: 0.65rem 0.35rem;
  }

  .feature-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn {
    transition: none;
  }
}