:root {
  --navy: #002d5a;
  --steel: #3d5a73;
  --steel-light: #e8edf2;
  --accent: #0066a1;
  --bg: #f8f9fb;
  --surface: #ffffff;
  --text: #0f1923;
  --text-muted: #5c6b7a;
  --border: #d0d8e0;
  --font: 'IBM Plex Sans', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.35;
}

.container {
  width: min(1320px, calc(100% - 4rem));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.section { padding: 5rem 0; }

/* Header */
.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  background: rgba(248, 249, 251, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo img {
  display: block;
  height: 2rem;
  width: auto;
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav__code {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--steel);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 4rem;
  border-bottom: 1px solid var(--border);
}

.hero__inner { padding: 4rem 0; }

.hero__line {
  width: 3px;
  height: 4rem;
  background: var(--accent);
  margin-bottom: 2rem;
}

.hero__label {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--steel);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.hero__title {
  font-size: clamp(2.75rem, 7vw, 5rem);
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1rem;
}

.hero__tagline {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  color: var(--text-muted);
  max-width: 48rem;
  margin-bottom: 2.5rem;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 2px;
  transition: background 0.2s, color 0.2s;
}

.btn--primary {
  background: var(--navy);
  color: var(--surface);
}

.btn--primary:hover { background: var(--accent); }

.btn--outline {
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
}

.btn--outline:hover { border-color: var(--navy); }

.hero__stats {
  display: flex;
  gap: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.stat__num {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  font-family: var(--mono);
}

.stat__label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Section head */
.section-head {
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.section-head__code {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--steel);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.section-head__title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--navy);
}

/* About */
.about__intro {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: none;
  margin-bottom: 3rem;
  line-height: 1.75;
}

.principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  background: var(--surface);
}

.principle {
  padding: 2rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.principle:nth-child(2n) { border-right: none; }
.principle:nth-child(n+3) { border-bottom: none; }

.principle__num {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.principle__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.principle__text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Services */
.services__intro {
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: none;
  font-size: 1.05rem;
}

.services__list {
  border-top: 1px solid var(--border);
}

.service {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 2rem;
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s;
}

.service:hover {
  background: var(--steel-light);
  margin: 0 -1.5rem;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.service__index {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
  padding-top: 0.15rem;
}

.service__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.4rem;
}

.service__text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Contacts */
.contacts__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.contact-block {
  background: var(--surface);
  padding: 2rem;
}

.contact-block--wide { grid-column: 1 / -1; }

.contact-block__label {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--steel);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.contact-block__value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  text-decoration: none;
}

a.contact-block__value:hover { color: var(--accent); }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  background: var(--surface);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__inner img { height: 1.75rem; width: auto; opacity: 0.6; }
.footer__inner p { font-size: 0.8rem; color: var(--text-muted); }

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .nav { display: none; }
  .principles { grid-template-columns: 1fr; }
  .principle { border-right: none !important; border-bottom: 1px solid var(--border) !important; }
  .principle:last-child { border-bottom: none !important; }
  .contacts__grid { grid-template-columns: 1fr; }
  .hero__stats { flex-direction: column; gap: 1.5rem; }
}

.visual-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 3rem;
  border: 1px solid var(--border);
  background: var(--border);
}
.visual-band img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  background: var(--surface);
}
@media (max-width: 768px) {
  .visual-band { grid-template-columns: 1fr; }
}