:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1d2430;
  --muted: #5b6678;
  --line: #d9e0ea;
  --primary: #173b6d;
  --primary-dark: #112b50;
  --accent: #b88a33;
  --max: 1140px;
  --radius: 18px;
  --shadow: 0 12px 30px rgba(16, 30, 54, 0.08);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

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

.wrap {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--primary-dark);
}

nav ul {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
}

nav a {
  color: var(--text);
  font-size: 0.98rem;
  font-weight: 600;
}

nav a.active,
nav a:hover {
  color: var(--primary);
}

.hero,
.page-hero {
  padding: 82px 0 56px;
  background: linear-gradient(180deg, #eef3fb 0%, #f5f7fb 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  padding: 8px 12px;
  background: rgba(23, 59, 109, 0.08);
  color: var(--primary);
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

h1, h2, h3 {
  line-height: 1.2;
  margin: 0 0 16px;
  color: var(--primary-dark);
}

h1 {
  font-size: clamp(2rem, 4vw, 3.6rem);
  max-width: 12ch;
}

.page-hero h1,
.authors-page h1,
.publications-page h1,
.about-page h1,
.contact-page h1 {
  max-width: none;
}

h2 {
  font-size: clamp(1.45rem, 2.1vw, 2.15rem);
}

h3 {
  font-size: 1.18rem;
}

p { margin: 0 0 16px; }

.lead {
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 60ch;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 12px;
  border: 1px solid var(--primary);
  font-weight: 700;
  transition: 0.2s ease;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
}

.btn.primary:hover {
  background: var(--primary-dark);
  text-decoration: none;
}

.btn.secondary {
  background: #fff;
  color: var(--primary);
}

.btn.secondary:hover {
  background: #f2f6fb;
  text-decoration: none;
}

.hero-card,
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.hero-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.hero-list li {
  padding: 12px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

section {
  padding: 34px 0;
}

.section-head {
  max-width: 72ch;
  margin-bottom: 24px;
}

.grid-3,
.grid-2,
.site-grid,
.author-grid {
  display: grid;
  gap: 20px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.site-grid { grid-template-columns: repeat(2, 1fr); }
.author-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.tag,
.mini-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  background: rgba(23, 59, 109, 0.08);
  padding: 7px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.author-card {
  overflow: hidden;
  text-align: center;
}

.author-photo {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
  margin: 0 auto 18px;
  border-radius: 16px;
  border: 1px solid var(--line);
}

.author-avatar {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: linear-gradient(135deg, #dde7f5, #f5e9cc);
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 16px;
  border: 1px solid var(--line);
}

.band {
  background: #eef3fb;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.list-clean {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

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

.site-footer {
  padding: 38px 0 50px;
  border-top: 1px solid var(--line);
  margin-top: 30px;
  background: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 26px;
}

.footer-brand {
  margin-bottom: 10px;
}

@media (max-width: 980px) {
  .hero-grid,
  .grid-3,
  .grid-2,
  .site-grid,
  .author-grid,
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }

  .grid-3,
  .grid-2,
  .site-grid,
  .author-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero,
  .page-hero {
    padding-top: 56px;
  }

  nav ul {
    gap: 14px;
  }
}