:root {
  --ink: #0e1a2b;
  --ink-soft: #536176;
  --muted: #7c8997;
  --line: #dfe7ee;
  --surface-soft: #f6f9fb;
  --surface-cool: #edf4f7;
  --accent: #17324a;
  --accent-soft: #d9e7ee;
  --max: 1120px;
  --radius: 26px;
  --shadow: 0 22px 70px rgba(14, 26, 43, 0.08);
}

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

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(217, 231, 238, 0.68), transparent 35rem),
    linear-gradient(180deg, #fff 0%, #f8fbfc 100%);
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.84);
  border-bottom: 1px solid rgba(223, 231, 238, 0.9);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
}

.brand img {
  width: 168px;
  height: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

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

.pill,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 11px 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.pill {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.76);
}

.button.primary {
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.78);
}

.pill:hover,
.button:hover { transform: translateY(-1px); }

main { overflow: hidden; }

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(58px, 9vw, 104px) 24px 58px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: clamp(32px, 6vw, 70px);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  color: var(--ink-soft);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--accent);
}

h1, h2, h3 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: -0.052em;
}

h1 {
  max-width: 620px;
  font-size: clamp(2.7rem, 6.1vw, 4.9rem);
}

h2 { font-size: clamp(2.2rem, 5vw, 4.2rem); }

h3 {
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.lead {
  max-width: 620px;
  margin: 26px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1.04rem, 1.8vw, 1.22rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-card {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding: clamp(26px, 4vw, 36px);
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-mark {
  width: 116px;
  height: 116px;
  border-radius: 50%;
  border: 16px solid var(--accent);
  border-right-color: transparent;
  position: relative;
}

.hero-mark::after {
  content: "";
  position: absolute;
  top: 6px;
  right: 18px;
  width: 22px;
  height: 64px;
  background: var(--accent);
}

.hero-card .label {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.76rem;
  margin-bottom: 12px;
}

.hero-card strong {
  display: block;
  max-width: 330px;
  font-size: clamp(2rem, 4.2vw, 3.1rem);
  line-height: 1.02;
  letter-spacing: -0.052em;
}

.tabs-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.tabs-page {
  padding-top: clamp(48px, 7vw, 78px);
}

.tabs {
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 8px);
  background: rgba(255,255,255,0.72);
  box-shadow: 0 18px 70px rgba(14, 26, 43, 0.055);
  overflow: hidden;
}

.tab-input { position: absolute; opacity: 0; pointer-events: none; }

.tab-labels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 10px;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--line);
}

.tab-labels label {
  cursor: pointer;
  user-select: none;
  text-align: center;
  padding: 14px 12px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-weight: 700;
  transition: background 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

#tab-services:checked ~ .tab-labels label[for="tab-services"],
#tab-method:checked ~ .tab-labels label[for="tab-method"],
#tab-about:checked ~ .tab-labels label[for="tab-about"],
#tab-contact:checked ~ .tab-labels label[for="tab-contact"] {
  color: var(--ink);
  background: #fff;
  box-shadow: 0 10px 30px rgba(14, 26, 43, 0.07);
}

.tab-panel {
  display: none;
  padding: clamp(28px, 6vw, 58px);
  min-height: 520px;
}

#tab-services:checked ~ .panels #services,
#tab-method:checked ~ .panels #method,
#tab-about:checked ~ .panels #about,
#tab-contact:checked ~ .panels #contact { display: block; }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.72fr);
  gap: 42px;
  align-items: end;
  margin-bottom: 38px;
}

.section-head p,
.panel p,
.panel li,
.contact-copy {
  color: var(--ink-soft);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  min-height: 230px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.number {
  color: var(--muted);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.card p { color: var(--ink-soft); margin: 16px 0 0; }

.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
  gap: 22px;
  align-items: stretch;
}

.panel {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #fff;
  padding: 34px;
}

.panel.soft { background: var(--surface-cool); }

.check-list {
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.check-list li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  align-items: start;
}

.check-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px var(--accent-soft);
}

.about-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.55fr);
  gap: 44px;
  align-items: end;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  padding: clamp(34px, 6vw, 58px);
}

.about-block p { color: rgba(255,255,255,0.72); margin: 0; }

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr);
  gap: 42px;
  align-items: start;
}

.contact-card {
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  padding: 30px;
  box-shadow: var(--shadow);
}

.contact-row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}

.contact-row:last-child { border-bottom: 0; }
.contact-row span:first-child { color: var(--muted); }

.site-footer {
  border-top: 1px solid var(--line);
  padding: 34px 24px;
  color: var(--muted);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

@media (max-width: 940px) {
  .hero,
  .section-head,
  .split,
  .about-block,
  .contact-grid { grid-template-columns: 1fr; }

  .hero-card { min-height: 320px; }
  .cards { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .brand img { width: 148px; }
  .hero { padding-top: 46px; }
  .tab-labels { grid-template-columns: 1fr 1fr; }
  .tab-panel { min-height: auto; }
}

@media (max-width: 460px) {
  .nav { padding-inline: 18px; }
  .hero, .tabs-wrap { padding-inline: 18px; }
  .tab-labels { grid-template-columns: 1fr; }
  .pill { display: none; }
}