.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(246, 247, 248, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(19, 127, 236, 0.08);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 82px;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.logo-image {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 12px;
}

.logo h1 {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  white-space: nowrap;
}
.main-nav {
  margin-left: auto;
}

.main-nav {
  margin-left: auto;
}

.main-nav .nav-list {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-light);
  transition: var(--transition);
}

.main-nav a:hover {
  color: var(--color-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-shrink: 0;
}

.hero {
  padding: 4.5rem 0 5rem;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 3rem;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.hero-badge {
  display: inline-flex;
  align-self: flex-start;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-text h2 {
  font-size: clamp(2.5rem, 5vw, 4.6rem);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.hero-text p {
  max-width: 640px;
  font-size: 1.08rem;
  color: var(--color-text-light);
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-info {
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.hero-info p {
  font-size: 0.95rem;
}

.hero-info strong {
  color: var(--color-text);
}

.hero-image {
  position: relative;
}

.hero-image-box {
  min-height: 520px;
  border-radius: 32px;
  background: linear-gradient(135deg, #d9ebff 0%, #eef5ff 100%);
  border: 1px solid rgba(19, 127, 236, 0.12);
  box-shadow: var(--shadow-md);
  display: grid;
  place-items: center;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 1.1rem;
}

.hero-image-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 32px;
}

.hero-card {
  position: absolute;
  left: -24px;
  bottom: -24px;
  background-color: var(--color-surface);
  border-radius: 20px;
  padding: 1.2rem 1.4rem;
  box-shadow: var(--shadow-md);
  min-width: 230px;
}

.hero-card-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-light);
  margin-bottom: 0.4rem;
}

.hero-card h3 {
  font-size: 1.3rem;
  font-weight: 800;
}

.levels {
  padding: 5rem 0;
  background-color: var(--color-surface);
}

.levels-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
}

.level-card {
  background-color: var(--color-bg);
  border: 1px solid #e7edf5;
  border-radius: 22px;
  padding: 1.5rem;
  transition: var(--transition);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
}

.level-card:hover {
  transform: translateY(-6px);
  border-color: rgba(19, 127, 236, 0.35);
  box-shadow: var(--shadow-md);
}

.level-badge {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  display: grid;
  place-items: center;
  font-weight: 800;
  margin-bottom: 1rem;
}

.level-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.7rem;
}

.level-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 1.4rem;
}

.level-card span {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
  width: 100%;
}

.cta {
  padding: 5rem 0;
}

.cta-container {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 32px;
  padding: 4rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.cta-container h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

.cta-container p {
  max-width: 700px;
  margin: 0 auto 2rem;
  color: rgba(255, 255, 255, 0.86);
  font-size: 1.05rem;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid #edf2f7;
  padding-top: 4rem;
}

.footer-container {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2.5rem;
}

.footer-brand h3,
.footer-links h4,
.footer-contact h4 {
  margin-bottom: 1rem;
}

.footer-brand p,
.footer-links a,
.footer-contact li {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.footer-links ul,
.footer-contact ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

.footer-bottom {
  border-top: 1px solid #edf2f7;
  padding: 1.25rem 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

@media (max-width: 1100px) {
  .levels-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .hero-container {
    grid-template-columns: 1fr;
  }

  .hero-image {
    order: -1;
  }

  .hero-image-box {
    min-height: 420px;
  }

  .hero-card {
    left: 20px;
    bottom: -20px;
  }
}

@media (max-width: 820px) {
  .main-nav {
    display: none;
  }

  .header-container {
    flex-wrap: wrap;
    padding: 1rem 0;
  }

  .header-actions {
    width: 100%;
  }

  .header-actions .btn {
    flex: 1;
  }

  .levels-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .hero {
    padding: 3rem 0 4rem;
  }

  .hero-image-box {
    min-height: 300px;
    border-radius: 24px;
  }

  .hero-card {
    position: static;
    margin-top: 1rem;
  }

  .levels-grid {
    grid-template-columns: 1fr;
  }

  .cta-container {
    padding: 3rem 1.25rem;
    border-radius: 24px;
  }
}