:root {
  --bg: #ffffff;
  --fg: #1b1f24;
  --muted: #5b6470;
  --line: #e4e8ee;
  --accent: #1763d6;
  --accent-dark: #0f4aa8;
  --soft: #f4f7fb;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .92);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(6px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--fg);
}
.logo:hover { text-decoration: none; }

.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #4d9bff);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: .85rem;
  font-weight: 800;
}

nav.main-nav { display: flex; gap: 22px; flex-wrap: wrap; }
nav.main-nav a { color: var(--muted); font-size: .95rem; }
nav.main-nav a:hover { color: var(--fg); text-decoration: none; }

/* hero */
.hero { padding: 76px 0 64px; }
.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.15;
  margin: 0 0 18px;
  letter-spacing: -.02em;
}
.hero p.lead {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 46rem;
  margin: 0 0 30px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 13px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: .97rem;
  border: 1px solid transparent;
  transition: .15s ease;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); text-decoration: none; }
.btn-ghost { border-color: var(--line); color: var(--fg); }
.btn-ghost:hover { border-color: #c9d2de; text-decoration: none; }

/* sections */
section { padding: 56px 0; }
section.alt { background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

h2 {
  font-size: 1.55rem;
  margin: 0 0 10px;
  letter-spacing: -.01em;
}
.section-intro { color: var(--muted); margin: 0 0 34px; max-width: 44rem; }

.grid { display: grid; gap: 20px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: #fff;
}
.card h3 { margin: 0 0 8px; font-size: 1.06rem; }
.card p { margin: 0; color: var(--muted); font-size: .95rem; }
.card .price { margin-top: 14px; font-weight: 700; color: var(--fg); }

.step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.step-num {
  flex: 0 0 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: .9rem;
}
.step h3 { margin: 2px 0 6px; font-size: 1.02rem; }
.step p { margin: 0; color: var(--muted); font-size: .95rem; }

/* cases */
.case {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.case-cover {
  height: 130px;
  background: linear-gradient(135deg, #dfe9f8, #eef3fb);
  display: grid;
  place-items: center;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: .04em;
  font-size: .82rem;
  text-transform: uppercase;
}
.case-body { padding: 20px; }
.case-body h3 { margin: 0 0 8px; font-size: 1.02rem; }
.case-body p { margin: 0; color: var(--muted); font-size: .93rem; }
.case-tags { margin-top: 14px; display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  font-size: .78rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 10px;
}

/* contacts */
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { padding: 14px 0; border-bottom: 1px solid var(--line); }
.contact-list li:last-child { border-bottom: 0; }
.contact-list .label { color: var(--muted); font-size: .86rem; display: block; }

/* footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  color: var(--muted);
  font-size: .88rem;
}
.site-footer .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .site-header .container { min-height: 60px; }
  nav.main-nav { gap: 14px; }
  .hero { padding: 52px 0 40px; }
}