:root {
  --ink: #0d1b2a;
  --navy: #1b263b;
  --accent: #f4a261;
  --mint: #2a9d8f;
  --paper: #f6f2ea;
  --shadow: rgba(13, 27, 42, 0.15);
}

body {
  font-family: 'Work Sans', Arial, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fef6e4 0%, #f6f2ea 45%, #f1f5f2 100%);
}

h1, h2, h3 {
  font-family: 'Playfair Display', 'Times New Roman', serif;
  letter-spacing: 0.5px;
}

.navbar {
  background: rgba(13, 27, 42, 0.9);
  box-shadow: 0 10px 30px rgba(13, 27, 42, 0.2);
}

.navbar-brand img {
  height: 70px;
}

.hero {
  position: relative;
  padding: 120px 0 90px;
  color: #fff;
  background: linear-gradient(120deg, #0d1b2a 0%, #1b263b 50%, #264653 100%);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  background: rgba(244, 162, 97, 0.18);
  border-radius: 50%;
  top: -120px;
  right: -160px;
}

.hero::before {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  background: rgba(42, 157, 143, 0.2);
  border-radius: 50%;
  bottom: -140px;
  left: -120px;
}

.hero .lead {
  font-size: 1.25rem;
  max-width: 520px;
}

.hero-card {
  background: #fff;
  color: var(--ink);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 24px 50px var(--shadow);
}

.hero-card .badge {
  background: var(--mint);
  font-weight: 600;
  letter-spacing: 0.6px;
}

.cta-btn {
  background: var(--accent);
  color: #1b263b;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 30px;
  border: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(244, 162, 97, 0.35);
  color: #1b263b;
  text-decoration: none;
}

.section {
  padding: 80px 0;
}

.section-title {
  margin-bottom: 20px;
}

.feature-card {
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 18px 40px var(--shadow);
  height: 100%;
  position: relative;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
}

.feature-card .card-link {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 2;
}

.feature-card .card-link:focus {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: rgba(42, 157, 143, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 16px;
}

.signal-strip {
  background: #fff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 14px 30px var(--shadow);
}

.badge-list img {
  height: 70px;
  margin: 10px 20px 0 0;
}

.contact-card {
  background: var(--navy);
  color: #fff;
  border-radius: 18px;
  padding: 36px;
  box-shadow: 0 20px 45px rgba(13, 27, 42, 0.4);
}

.course-card {
  background: #fff;
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 18px 40px var(--shadow);
}

.course-video {
  width: 100%;
  border-radius: 14px;
  box-shadow: 0 16px 36px rgba(13, 27, 42, 0.2);
  margin-bottom: 16px;
}

.course-meta {
  font-size: 0.95rem;
  color: #4a5568;
}

.footer {
  padding: 30px 0 50px;
  font-size: 0.95rem;
  color: #4a5568;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .hero {
    padding: 100px 0 70px;
  }

  .hero::after,
  .hero::before {
    opacity: 0.4;
  }

  .badge-list img {
    height: 58px;
    margin-right: 12px;
  }
}