:root {
  --bg: #f4f5f7;
  --ink: #0e1520;
  --muted: #5a6575;
  --line: rgba(14, 21, 32, 0.1);
  --accent: #1d4ed8;
  --accent-soft: #dbe6ff;
  --surface: #ffffff;
  --deep: #0a1018;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --space: clamp(1.2rem, 4vw, 2rem);
  --max: 1100px;
}

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

html { scroll-behavior: smooth; }

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 100;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 1rem;
}
.skip-link:focus { left: 1rem; top: 1rem; }

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  background: rgba(244, 245, 247, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
.site-header.scrolled { border-bottom-color: var(--line); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
}

.nav {
  display: none;
  gap: 1.75rem;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 500;
}
.nav a:hover,
.nav a:focus-visible { color: var(--accent); outline: none; }
.nav-cta {
  background: var(--ink);
  color: #fff !important;
  padding: 0.5rem 1.05rem;
  border-radius: 6px;
  transition: background 0.25s;
}
.nav-cta:hover,
.nav-cta:focus-visible { background: var(--accent) !important; }

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
  display: block;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem var(--space) 1.5rem;
  border-top: 1px solid var(--line);
  background: var(--bg);
}
.mobile-nav[hidden] { display: none !important; }

@media (min-width: 768px) {
  .nav { display: flex; }
  .nav-toggle { display: none; }
  .mobile-nav { display: none !important; }
}

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding: 8rem 0 5rem;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 30%, var(--bg) 92%),
    linear-gradient(90deg, var(--bg) 0%, transparent 50%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 47px,
      rgba(29, 78, 216, 0.06) 47px,
      rgba(29, 78, 216, 0.06) 48px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 47px,
      rgba(29, 78, 216, 0.06) 47px,
      rgba(29, 78, 216, 0.06) 48px
    ),
    radial-gradient(ellipse 50% 50% at 80% 35%, rgba(29, 78, 216, 0.2), transparent 60%),
    linear-gradient(145deg, #e8ecf4 0%, #f4f5f7 50%, #dfe6f2 100%);
  animation: gridPulse 14s ease-in-out infinite alternate;
}

@keyframes gridPulse {
  from { opacity: 0.9; }
  to { opacity: 1; }
}

.hero-inner { position: relative; z-index: 1; max-width: 36rem; }

.brand-line {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.75rem, 9vw, 5rem);
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 0 0 1.25rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.85rem, 4.5vw, 2.85rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 1.15rem;
}

.hero-lead {
  color: var(--muted);
  font-size: 1.08rem;
  margin: 0 0 2rem;
  max-width: 30rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 6px;
  border: 1.5px solid transparent;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #163db0; }
.btn-ghost {
  border-color: var(--line);
  background: var(--surface);
}
.btn-ghost:hover { border-color: var(--ink); }

.section { padding: clamp(4rem, 9vw, 6.5rem) 0; }
.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.85rem;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.5vw, 2.35rem);
  letter-spacing: -0.03em;
  margin: 0 0 2.25rem;
  max-width: 18ch;
  line-height: 1.15;
}

.about { border-top: 1px solid var(--line); }
.about-grid {
  display: grid;
  gap: 2rem;
}
.about-grid h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.5vw, 2.35rem);
  letter-spacing: -0.03em;
  margin: 0;
  max-width: 14ch;
  line-height: 1.15;
}
.about-copy p {
  color: var(--muted);
  margin: 0 0 1rem;
  font-size: 1.05rem;
}
.about-copy p:last-child { margin-bottom: 0; }
@media (min-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr 1.15fr;
    gap: 3.5rem;
  }
}

.solutions { background: var(--surface); border-block: 1px solid var(--line); }
.sol-grid {
  display: grid;
  gap: 2rem;
}
.sol-index {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 0.75rem;
  letter-spacing: 0.06em;
}
.sol-grid h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}
.sol-grid p {
  color: var(--muted);
  margin: 0;
}
@media (min-width: 768px) {
  .sol-grid { grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
}

.approach { background: var(--deep); color: #e8ecf2; }
.approach .section-label { color: #8babf0; }
.approach .section-title { color: #e8ecf2; }
.principles {
  display: grid;
  gap: 1.5rem;
}
.principles article {
  padding: 1.5rem 0;
  border-top: 1px solid rgba(232, 236, 242, 0.12);
}
.principles article:last-child {
  border-bottom: 1px solid rgba(232, 236, 242, 0.12);
}
.principles h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
  letter-spacing: -0.02em;
}
.principles p {
  color: rgba(232, 236, 242, 0.65);
  margin: 0;
}
@media (min-width: 768px) {
  .principles {
    grid-template-columns: 1fr 1fr;
    gap: 0 3rem;
  }
}

.contact { text-align: center; }
.contact-inner h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.85rem, 4vw, 2.6rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.65rem;
}
.contact-inner p {
  color: var(--muted);
  margin: 0 0 1.75rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.footer-inner nav a:hover,
.footer-inner nav a:focus-visible { color: var(--accent); outline: none; }
.footer-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}
@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(1rem);
  animation: revealUp 0.85s ease forwards;
}
.delay-1 { animation-delay: 0.12s; }
.delay-2 { animation-delay: 0.24s; }
.delay-3 { animation-delay: 0.36s; }

@keyframes revealUp {
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; animation: none; }
  .hero-grid-bg { animation: none; }
}

/* Legal + 404 pages */
.legal-page,
.error-page {
  padding-block: clamp(6rem, 16vw, 8rem) 4rem;
  min-height: 60vh;
}
.legal-page .container,
.error-page .container {
  max-width: 42rem;
}
.legal-page h1,
.error-page h1 {
  font-family: var(--font-display, Georgia, serif);
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}
.legal-page .legal-updated {
  font-size: 0.9rem;
  opacity: 0.7;
  margin: 0 0 2rem;
}
.legal-page h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.75rem;
}
.legal-page p,
.legal-page li {
  margin: 0 0 1rem;
  line-height: 1.65;
}
.legal-page ul {
  padding-left: 1.25rem;
  margin: 0 0 1rem;
}
.error-page {
  text-align: center;
  display: flex;
  align-items: center;
}
.error-page .container {
  margin-inline: auto;
}
.error-page .error-code {
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.65;
  margin-bottom: 0.75rem;
}
.error-page p {
  margin: 0 0 1.75rem;
  opacity: 0.8;
}