/* Teaching Pages */

.teaching-header {
  background: linear-gradient(135deg, #07182d, #1d4ed8);
  color: white;
}

.teaching-nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.teaching-logo { font-size: 24px; font-weight: 700; }

.teaching-nav-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.teaching-nav-links a {
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.teaching-nav-links a:hover,
.teaching-nav-links .active { color: #93c5fd; }

.teaching-hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 75px 28px 55px;
}

.teaching-hero h1 {
  font-size: clamp(2.3rem, 5vw, 4.2rem);
  line-height: 1.1;
  margin: 0 0 18px;
}

.teaching-hero p {
  max-width: 850px;
  font-size: 1.15rem;
  color: #dbeafe;
  line-height: 1.75;
}

.teaching-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 55px 28px;
}

.teaching-section { margin-bottom: 55px; }

.teaching-section h2 {
  font-size: 2rem;
  color: #0f172a;
  margin-bottom: 18px;
}

.teaching-section p { color: #475569; line-height: 1.75; }

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.course-card {
  background: white;
  border-radius: 18px;
  padding: 28px;
  border: 1px solid #e5e7eb;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  position: relative;
  overflow: hidden;
}

.course-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 7px; height: 100%;
}

.course-card.analytics::before { background: #2563eb; }
.course-card.entrepreneurship::before { background: #f97316; }
.course-card.systems::before { background: #7c3aed; }
.course-card.data::before { background: #16a34a; }
.course-card.infrastructure::before { background: #0f766e; }

.course-icon { font-size: 34px; margin-bottom: 14px; }

.course-card h3 { margin: 0 0 10px; color: #0f172a; }
.course-card p { color: #475569; line-height: 1.7; }

.course-tag {
  display: inline-block;
  margin-top: 10px;
  padding: 7px 12px;
  background: #f1f5f9;
  border-radius: 999px;
  font-size: 0.9rem;
  color: #334155;
  font-weight: 700;
}

.course-card a,
.back-link {
  display: inline-block;
  margin-top: 16px;
  color: #2563eb;
  font-weight: 700;
  text-decoration: none;
}

.course-card a:hover,
.back-link:hover { text-decoration: underline; }

.philosophy-box {
  background: #f8fafc;
  border-left: 5px solid #2563eb;
  border-radius: 16px;
  padding: 28px;
}

.method-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.method-item {
  background: white;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 22px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}

.course-detail-card {
  background: white;
  border-radius: 18px;
  padding: 36px;
  border: 1px solid #e5e7eb;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  margin-bottom: 28px;
}

.course-detail-card h2 { margin-top: 0; }
.course-detail-card li { margin-bottom: 10px; color: #475569; line-height: 1.7; }

.teaching-footer {
  background: #07182d;
  color: #cbd5e1;
  text-align: center;
  padding: 28px;
  margin-top: 50px;
}

@media (max-width: 820px) {
  .teaching-nav { flex-direction: column; gap: 16px; }
  .course-grid, .method-list { grid-template-columns: 1fr; }
}