/* ============================================================
   Патентное бюро «Интлид» — стили сайта.
   Спокойная гамма: тёплый серый фон, тёмно-синий акцент.
   ============================================================ */

:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --ink: #232a31;
  --ink-soft: #5b6570;
  --line: #e3e7ec;
  --accent: #2c4a6e;        /* тёмно-синий */
  --accent-soft: #e8eef5;
  --accent-hover: #22395a;
  --gold: #a8895a;         /* сдержанный «патентный» акцент */
  --radius: 10px;
  --shadow: 0 1px 3px rgba(30, 40, 60, .07);
  --maxw: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font: 16px/1.65 "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

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

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: 8px 14px; z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- header ---------- */

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
}

.header-inner {
  display: flex; align-items: center; gap: 24px;
  min-height: 68px; flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px;
}

.brand { display: flex; flex-direction: column; line-height: 1.15; margin-right: 8px; }
.brand:hover { text-decoration: none; }
.brand-name {
  font-size: 22px; font-weight: 700; letter-spacing: .06em;
  color: var(--accent); text-transform: uppercase;
}
.brand-tag { font-size: 12px; color: var(--gold); letter-spacing: .14em; text-transform: lowercase; }

.main-nav { display: flex; flex-wrap: wrap; gap: 2px; flex: 1; }
.nav-link {
  padding: 8px 13px; border-radius: 8px;
  color: var(--ink); font-size: 15px; font-weight: 500;
}
.nav-link:hover { background: var(--accent-soft); color: var(--accent); text-decoration: none; }

.header-tools { display: flex; align-items: center; gap: 14px; margin-left: auto; }

.lang-switch { display: inline-flex; gap: 4px; font-size: 14px; }
.lang-switch a {
  padding: 4px 9px; border-radius: 6px; color: var(--ink-soft); font-weight: 600;
}
.lang-switch a:hover { background: var(--accent-soft); text-decoration: none; }
.lang-switch a.lang-active { background: var(--accent); color: #fff; }

.menu-toggle {
  display: none; background: none; border: 1px solid var(--line);
  border-radius: 8px; padding: 9px 10px; cursor: pointer; margin-left: auto;
}
.menu-toggle span { display: block; width: 20px; height: 2px; background: var(--ink); margin: 4px 0; }

/* ---------- buttons ---------- */

.btn {
  display: inline-block; padding: 10px 20px; border-radius: 8px;
  font-weight: 600; font-size: 15px; border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-secondary { background: var(--surface); color: var(--accent); border-color: var(--accent); }
.btn-secondary:hover { background: var(--accent-soft); color: var(--accent); }
.btn-sm { padding: 7px 14px; font-size: 14px; }

/* ---------- content ---------- */

.page { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
        box-shadow: var(--shadow); padding: 40px clamp(20px, 5vw, 56px); margin: 28px 0; }

.page-title {
  font-size: clamp(26px, 3.4vw, 36px); line-height: 1.2; margin: 0 0 26px;
  color: var(--accent); font-weight: 700; letter-spacing: -.01em;
}

.prose h2 { font-size: 22px; margin: 34px 0 12px; color: var(--ink); }
.prose h3 { font-size: 18px; margin: 28px 0 10px; color: var(--ink); }
.prose p { margin: 0 0 14px; }
.prose ul, .prose ol { margin: 0 0 16px; padding-left: 22px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--ink); }
.prose em { color: var(--ink-soft); }

.prose blockquote {
  margin: 20px 0; padding: 12px 20px; border-left: 3px solid var(--gold);
  background: var(--accent-soft); border-radius: 0 8px 8px 0; color: var(--ink-soft);
}

.prose table {
  width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px;
}
.prose th, .prose td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
.prose thead th { background: var(--accent-soft); color: var(--accent); }
.prose tbody tr:nth-child(even) { background: #fafbfc; }

.prose hr { border: none; border-top: 1px solid var(--line); margin: 30px 0; }

/* sub navigation on service pages */
.sub-nav {
  display: flex; flex-wrap: wrap; gap: 6px; margin: 24px 0 -8px;
  padding: 12px 14px; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius);
}
.subnav-link {
  font-size: 14px; padding: 6px 12px; border-radius: 999px;
  color: var(--ink-soft); background: var(--bg);
}
.subnav-link:hover { background: var(--accent-soft); color: var(--accent); text-decoration: none; }

/* ---------- home hero & cards (raw HTML inside index.md) ---------- */

.hero {
  background: linear-gradient(135deg, #243b55 0%, #2c4a6e 55%, #3d5a80 100%);
  color: #eef2f7; border-radius: var(--radius);
  padding: clamp(30px, 6vw, 64px) clamp(22px, 5vw, 60px);
  margin: 28px 0 0; box-shadow: var(--shadow);
}
.hero h1 { margin: 0 0 14px; font-size: clamp(26px, 4vw, 40px); line-height: 1.2; color: #fff; }
.hero p { margin: 0 0 8px; max-width: 720px; color: #d7e0ea; font-size: 17px; }
.hero .hero-actions { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero .btn-primary { background: #fff; color: var(--accent); }
.hero .btn-primary:hover { background: var(--accent-soft); }
.hero .btn-secondary { border-color: #9db4cc; color: #eef2f7; background: transparent; }
.hero .btn-secondary:hover { background: rgba(255,255,255,.1); color: #fff; }

.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px; margin: 22px 0 8px;
}
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; box-shadow: var(--shadow); transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 4px 14px rgba(30,40,60,.10); }
.card h3 { margin: 0 0 8px; font-size: 16.5px; }
.card h3 a { color: var(--accent); }
.card p { margin: 0; font-size: 14.5px; color: var(--ink-soft); }

.bignumbers { display: flex; flex-wrap: wrap; gap: 34px; margin: 26px 0 6px; }
.bignumber b { display: block; font-size: 34px; color: var(--accent); font-weight: 700; }
.bignumber span { font-size: 14px; color: var(--ink-soft); }

.client-list { columns: 2 320px; gap: 34px; font-size: 14.5px; color: var(--ink-soft); margin: 14px 0; }
.client-list li { break-inside: avoid; margin-bottom: 5px; }

/* ---------- cta band / footer ---------- */

.cta-band {
  background: var(--accent-soft); border-top: 1px solid var(--line);
  margin-top: 40px; padding: 30px 0;
}
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.cta-inner p { margin: 0; font-size: 18px; font-weight: 600; color: var(--accent); }
.cta-actions { display: flex; gap: 10px; flex-wrap: wrap; }

.site-footer {
  background: var(--surface); border-top: 1px solid var(--line);
  padding: 26px 0; font-size: 14px; color: var(--ink-soft);
}
.footer-inner { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .menu-toggle { display: block; order: 3; }
  .main-nav {
    display: none; flex-basis: 100%; flex-direction: column; order: 4;
    border-top: 1px solid var(--line); padding-top: 8px;
  }
  .main-nav.open { display: flex; }
  .header-tools { order: 2; }
  .page { padding: 28px 20px; }
  .client-list { columns: 1; }
}