/* Порядок в доме — единый файл стилей */
*,
*::before,
*::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, sans-serif;
  background: #f6f5f2;
  color: #1c1f26;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; border-radius: 16px; }
a { color: #2f6bff; text-decoration: none; transition: color .2s ease; }
a:hover { color: #ff6a3d; }
h1, h2, h3, h4 {
  font-family: 'Montserrat', 'Inter', sans-serif;
  color: #14171f;
  line-height: 1.25;
  letter-spacing: -0.01em;
}
/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid #ececec;
}
.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.logo {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: #14171f;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.logo-badge {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2f6bff, #ff6a3d);
  display: inline-block;
}
.logo span { color: #ff6a3d; }
.main-nav {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}
.main-nav a {
  color: #3a3f4b;
  font-weight: 500;
  font-size: 15px;
  padding: 8px 4px;
  position: relative;
}
.main-nav a:hover { color: #14171f; }
.main-nav a::after {
  content: '';
  position: absolute;
  left: 4px; right: 4px; bottom: 2px;
  height: 2px;
  background: #ff6a3d;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.main-nav a:hover::after { transform: scaleX(1); }
/* ===== Container ===== */
.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
}
/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  margin: 32px auto 56px;
  max-width: 1240px;
  border-radius: 28px;
  min-height: 460px;
  padding: 80px 56px;
  color: #fff;
  background:
    linear-gradient(120deg, rgba(20,23,31,.72), rgba(47,107,255,.55)),
    url('https://images.unsplash.com/photo-1556909114-f6e7ad7d3136?auto=format&fit=crop&w=1600&q=80') center/cover;
}
.hero h1 {
  color: #fff;
  font-size: clamp(32px, 5vw, 54px);
  max-width: 780px;
  margin: 0 0 20px;
}
.hero p {
  font-size: clamp(16px, 1.6vw, 20px);
  max-width: 640px;
  color: #eef1f8;
  margin: 0 0 32px;
}
.hero .btn {
  display: inline-block;
  background: #ff6a3d;
  color: #fff;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  transition: transform .2s ease, background .2s ease;
}
.hero .btn:hover { background: #ff8560; transform: translateY(-2px); color:#fff; }
/* ===== Section ===== */
.section {
  padding: 24px 0 64px;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}
.section-head h2 {
  font-size: clamp(24px, 3vw, 34px);
  margin: 0;
}
.section-head p {
  color: #5a6172;
  max-width: 520px;
  margin: 0;
}
/* ===== Cards grid ===== */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 26px;
}
.card {
  background: #fff;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 2px 6px rgba(20,23,31,.04), 0 20px 40px -24px rgba(20,23,31,.12);
  transition: transform .25s ease, box-shadow .25s ease;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 4px 8px rgba(20,23,31,.05), 0 28px 50px -20px rgba(20,23,31,.2);
}
.card-img {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 0;
  transition: transform .5s ease;
}
.card:hover .card-img img { transform: scale(1.06); }
.card-body {
  padding: 22px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.card-tag {
  font-size: 12px;
  font-weight: 600;
  color: #ff6a3d;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.card h3 {
  margin: 0;
  font-size: 19px;
}
.card p {
  margin: 0;
  color: #5a6172;
  font-size: 15px;
}
.card .card-link {
  margin-top: auto;
  padding-top: 12px;
  font-weight: 600;
  color: #2f6bff;
}
/* ===== Article layout ===== */
.article-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  padding: 40px 0 64px;
}
.article {
  background: #fff;
  border-radius: 24px;
  padding: 44px 48px 52px;
  box-shadow: 0 2px 6px rgba(20,23,31,.04), 0 24px 50px -30px rgba(20,23,31,.15);
}
.article h1 {
  font-size: clamp(28px, 3.4vw, 40px);
  margin: 0 0 12px;
}
.article .meta {
  color: #8a8f9c;
  font-size: 14px;
  margin-bottom: 28px;
}
.article h2 {
  font-size: 24px;
  margin: 40px 0 14px;
}
.article h3 {
  font-size: 19px;
  margin: 28px 0 10px;
}
.article p { margin: 0 0 16px; color: #2a2f3a; }
.article ul, .article ol { padding-left: 22px; margin: 0 0 20px; }
.article li { margin-bottom: 8px; }
.article figure { margin: 28px 0; }
.article figcaption { text-align: center; color: #8a8f9c; font-size: 13px; margin-top: 8px; }
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 96px;
  align-self: start;
}
.sidebar-card {
  background: #fff;
  border-radius: 20px;
  padding: 24px 26px;
  box-shadow: 0 2px 6px rgba(20,23,31,.04), 0 18px 40px -28px rgba(20,23,31,.15);
}
.sidebar-card h4 {
  margin: 0 0 14px;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #14171f;
}
.sidebar-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.sidebar-card li a {
  color: #2a2f3a;
  font-size: 15px;
  line-height: 1.4;
  border-left: 3px solid transparent;
  padding-left: 10px;
  display: block;
  transition: border-color .2s ease, color .2s ease;
}
.sidebar-card li a:hover {
  border-color: #ff6a3d;
  color: #14171f;
}
/* ===== Ad blocks ===== */
.ad {
  margin: 24px auto;
  padding: 18px 22px;
  background: linear-gradient(135deg, #eef2ff, #fff4ee);
  border: 1px dashed #d5dbe6;
  border-radius: 16px;
  color: #5a6172;
  font-size: 13px;
  text-align: center;
}
.ad-slot { min-height: 40px; }
.ad-header { max-width: 1240px; }
/* ===== Footer ===== */
.site-footer {
  background: #14171f;
  color: #c8ccd6;
  padding: 56px 0 30px;
  margin-top: 60px;
}
.footer-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
}
.site-footer h5 {
  color: #fff;
  font-family: 'Montserrat', sans-serif;
  font-size: 15px;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin: 0 0 16px;
}
.site-footer p { margin: 0 0 12px; font-size: 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.site-footer a { color: #c8ccd6; font-size: 14px; }
.site-footer a:hover { color: #ff6a3d; }
.copy {
  max-width: 1240px;
  margin: 40px auto 0;
  padding: 20px 28px 0;
  border-top: 1px solid #262b36;
  font-size: 13px;
  color: #8a8f9c;
}
/* ===== Responsive ===== */
@media (max-width: 960px) {
  .article-wrap { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .article { padding: 32px 26px; }
  .hero { padding: 60px 28px; min-height: 380px; margin: 20px 16px 40px; }
  .footer-inner { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .header-inner { padding: 14px 18px; }
  .main-nav { gap: 14px; }
  .main-nav a { font-size: 14px; }
  .container { padding: 0 18px; }
}