/* КООП procurement-research — статический сайт */
:root {
  --primary: #4552F7;
  --primary-dark: #2a37c7;
  --accent: #EB5A20;
  --bg: #F5F7FF;
  --surface: #ffffff;
  --text: #1D1F26;
  --muted: #6B7280;
  --border: #e5e7eb;
  --code-bg: #f3f4f6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117;
    --surface: #1a1d29;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --border: #2a2f3e;
    --code-bg: #14171f;
    --primary: #6b75f5;
    --primary-dark: #4552F7;
  }
}

* { box-sizing: border-box; }

html { font-size: 16px; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  line-height: 1.6;
  font-size: 16px;
}

.wrapper {
  max-width: 880px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.topnav {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.9rem;
}

.topnav__brand {
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
}

.topnav__brand:hover { color: var(--primary-dark); }

.topnav__nav { display: flex; gap: 1rem; flex-wrap: wrap; }

.topnav__nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

.topnav__nav a:hover { color: var(--primary); }

.topnav__nav a.topnav__cta {
  background: var(--accent);
  color: #fff;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  font-weight: 600;
}

.topnav__nav a.topnav__cta:hover {
  background: #c94912;
  color: #fff;
}

.atlas-banner {
  display: block;
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  background: linear-gradient(135deg, #FFF4ED 0%, #ffffff 100%);
  border: 2px solid var(--accent);
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  transition: transform 0.15s;
}

.atlas-banner:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(235, 90, 32, 0.15);
}

.atlas-banner__label {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.atlas-banner__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.atlas-banner__desc {
  font-size: 0.9rem;
  color: var(--muted);
}

@media (prefers-color-scheme: dark) {
  .atlas-banner {
    background: linear-gradient(135deg, #2a1810 0%, var(--surface) 100%);
  }
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text);
  font-weight: 600;
  line-height: 1.3;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

h1 {
  font-size: 2rem;
  color: var(--primary);
  border-bottom: 2px solid var(--border);
  padding-bottom: 0.5rem;
  margin-top: 1rem;
}

h2 { font-size: 1.5rem; margin-top: 2.5rem; }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.05rem; color: var(--muted); }

p { margin: 0.75rem 0; }

a {
  color: var(--primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}

a:hover { border-bottom-color: var(--primary); }

ul, ol { padding-left: 1.5rem; margin: 0.75rem 0; }

li { margin: 0.25rem 0; }

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1.25rem 0;
  font-size: 0.95rem;
  background: var(--surface);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  background: var(--bg);
  font-weight: 600;
  border-bottom: 2px solid var(--border);
}

tr:last-child td { border-bottom: none; }

code {
  font-family: 'JetBrains Mono', 'SF Mono', Menlo, Monaco, Consolas, monospace;
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--accent);
}

pre {
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1rem 0;
  border: 1px solid var(--border);
}

pre code {
  background: none;
  padding: 0;
  color: var(--text);
  font-size: 0.85em;
}

blockquote {
  border-left: 4px solid var(--primary);
  padding: 0.5rem 1rem;
  margin: 1rem 0;
  background: var(--code-bg);
  color: var(--muted);
  border-radius: 0 8px 8px 0;
}

blockquote p { margin: 0.5rem 0; }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* Цветовые «звёзды» рейтинга */
.wrapper:has(td:contains("🔴")) { /* hint, не реально CSS */ }

/* Индекс */
.index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.index-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
}

.index-card h3 {
  margin-top: 0;
  font-size: 1rem;
  color: var(--primary);
}

.index-card p {
  margin: 0.25rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.meta a { color: var(--muted); }

footer {
  margin-top: 4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

/* Responsive */
@media (max-width: 640px) {
  .wrapper { padding: 1rem 1rem 3rem; }
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  table { font-size: 0.85rem; }
  th, td { padding: 0.4rem 0.5rem; }
}