:root {
  --primary: #2d3436;
  --accent: #e67e22;
  --text: #636e72;
  --bg: #ffffff;
  --light-bg: #f9f9f9;
  --transition: 0.3s ease;
}

body {
  font-family: 'Inter', sans-serif;
  margin: 0;
  color: var(--primary);
  line-height: 1.6;
  background: var(--bg);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  padding: 15px 0;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  background: #fff;
  z-index: 1000;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 800;
  font-size: 24px;
  text-decoration: none;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: -1px;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  text-decoration: none;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--accent);
}

.hero {
  padding: 30px 0;
  background: var(--light-bg);
  text-align: center;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 48px);
  margin-bottom: 20px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 800;
}

.hero p {
  font-size: 18px;
  color: var(--text);
  max-width: 600px;
  margin: 0 auto 40px;
}

.section-title {
  text-align: center;
  margin: 60px 0 40px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 60px;
}

.card {
  background: #fff;
  border: 1px solid #eee;
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

.card-img {
  height: 220px;
  background-color: #f0f0f0;
  background-size: cover;
  background-position: center;
}

.card-content {
  padding: 25px;
}

.card-content h3 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 600;
}

.card-content p {
  margin: 0;
  color: var(--text);
  font-size: 15px;
}

.content-expert-block {
  padding: 40px 0;
  background-color: #fff;
  border-top: 1px solid #eee;
}

.pro-climbing-guide {
  max-width: 900px;
  margin: 0 auto;
  color: #444;
  font-size: 17px;
  line-height: 1.8;
}

.pro-climbing-guide h2 {
  font-size: 32px;
  color: var(--primary);
  margin-bottom: 30px;
}

.pro-climbing-guide h3 {
  font-size: 28px;
  color: var(--primary);
  margin-top: 50px;
  margin-bottom: 20px;
  border-left: 4px solid var(--accent);
  padding-left: 20px;
}

.pro-climbing-guide h4 {
  font-size: 22px;
  margin-top: 30px;
  color: #222;
}

.expert-note {
  background: #fff5eb;
  border-left: 5px solid #f39c12;
  padding: 25px;
  margin: 40px 0;
  font-style: italic;
  border-radius: 0 8px 8px 0;
}

.gear-checklist {
  background: var(--light-bg);
  padding: 30px;
  border-radius: 12px;
  margin: 40px 0;
}

.gear-checklist h4 {
  margin-top: 0;
}

.gear-checklist ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  list-style-type: '✓ ';
  padding-left: 20px;
}

footer {
  background: var(--primary);
  color: #fff;
  padding: 80px 0 40px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 40px;
}

.footer-links h4 {
  margin-bottom: 25px;
  font-size: 18px;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.footer-links a {
  display: block;
  color: #bdc3c7;
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
}

.copyright {
  text-align: center;
  padding-top: 40px;
  color: #7f8c8d;
  font-size: 13px;
}

.content-image-wrapper {
  margin: 40px 0;
  text-align: center;
}

.featured-content-image {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
  display: block;
  margin: auto;
}

.content-image-wrapper figcaption {
  margin-top: 15px;
  font-size: 14px;
  color: var(--text);
  font-style: italic;
}

.main-grid {
  display: grid;
  grid-template-columns: 250px 1fr 250px;
  gap: 40px;
  margin-top: 40px;
  align-items: start;
}

.sidebar-left,
.sidebar-right {
  position: sticky;
  top: 100px;
}

.sidebar-box {
  background: var(--light-bg);
  padding: 20px;
  border-radius: 12px;
  border: 1px solid #eee;
  margin-bottom: 30px;
}

.sidebar-box h4 {
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
  color: var(--primary);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 10px;
  display: inline-block;
}

.sidebar-box ul,
.sidebar-box nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-box ul li a,
.sidebar-box nav a {
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  display: block;
}

.sidebar-box ul li a:hover,
.sidebar-box nav a:hover {
  color: var(--accent);
  padding-left: 5px;
}

@media (max-width: 1100px) {
  .main-grid {
    grid-template-columns: 1fr;
  }

  .sidebar-left,
  .sidebar-right {
    position: static;
  }

  .pro-climbing-guide {
    order: 1;
  }
}

@media (max-width: 768px) {
  .content-image-wrapper {
    margin: 30px 0;
  }
  nav {
    flex-direction: column;
    gap: 15px;
  }

  .nav-links {
    width: 100%;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
  }

  .nav-links a {
    font-size: 13px;
    background: var(--light-bg);
    padding: 8px 12px;
    border-radius: 6px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .gear-checklist ul {
    grid-template-columns: 1fr;
  }
}