* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #111413;
  color: #1d2422;
  font-family: Arial, sans-serif;
}

.container2 {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 24px;
  min-height: calc(100vh - 70px);
  padding: 24px;
}

.sidebar {
  position: sticky;
  top: 88px;
  align-self: start;
  min-height: 360px;
  padding: 22px;
  color: #f4f7f5;
  background: #171d1b;
  border: 1px solid #2b3632;
  border-radius: 8px;
}

.sidebar h2 {
  margin: 0 0 18px;
  color: #ffffff;
  font-size: 1.6rem;
}

.sidebar ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar a {
  display: block;
  padding: 11px 12px;
  color: #dbe7e1;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 8px;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.sidebar a:hover {
  color: #ffffff;
  background: #22312c;
  border-color: #3b5149;
}

.content {
  min-width: 0;
  padding: 32px;
  overflow: hidden;
  background: #f5f7f4;
  border-radius: 8px;
}

.content h1 {
  margin: 0 0 18px;
  color: #15201c;
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1;
}

.cert-hero {
  padding: 28px;
  margin-bottom: 22px;
  color: #ffffff;
  background: linear-gradient(135deg, #14241f, #25443a);
  border-radius: 8px;
}

.cert-label,
.resource-type,
.section-title span {
  color: #6b7b33;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cert-hero .cert-label {
  color: #d9ef8f;
}

.cert-hero h2 {
  margin: 12px 0;
  font-size: clamp(1.5rem, 3vw, 2.6rem);
  line-height: 1.1;
}

.cert-hero p {
  max-width: 760px;
  margin: 0;
  color: #dce7e2;
  font-size: 1.05rem;
  line-height: 1.7;
}

.content-section {
  padding: 24px 0;
  border-top: 1px solid #dce3de;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.section-title h2 {
  margin: 0;
  color: #18231f;
  font-size: 1.35rem;
}

.study-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.study-list li {
  position: relative;
  padding: 14px 16px 14px 42px;
  line-height: 1.55;
  background: #ffffff;
  border: 1px solid #dce3de;
  border-radius: 8px;
}

.study-list li::before {
  position: absolute;
  top: 17px;
  left: 16px;
  width: 10px;
  height: 10px;
  content: "";
  background: #6b7b33;
  border-radius: 50%;
}

.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 14px;
}

.resource-card {
  display: grid;
  gap: 10px;
  min-height: 160px;
  padding: 18px;
  color: #1f2925;
  text-decoration: none;
  background: #ffffff;
  border: 1px solid #dce3de;
  border-radius: 8px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.resource-card:hover {
  transform: translateY(-3px);
  border-color: #839344;
  box-shadow: 0 14px 30px rgba(24, 35, 31, 0.14);
}

.resource-card strong {
  color: #15201c;
  font-size: 1.05rem;
}

.resource-card p {
  margin: 0;
  color: #5d6863;
  line-height: 1.5;
}

.empty-state {
  margin: 0;
  padding: 18px;
  color: #5d6863;
  background: #ffffff;
  border: 1px dashed #b9c4be;
  border-radius: 8px;
}

@media (max-width: 760px) {
  .container2 {
    grid-template-columns: 1fr;
    padding: 14px;
  }

  .sidebar {
    position: static;
    min-height: auto;
  }

  .sidebar ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content {
    padding: 20px;
  }

  .cert-hero {
    padding: 20px;
  }
}