/* Basic reset */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Poppins', sans-serif;
  line-height: 1.5;
  color: #222222;
  background-color: #f5f6fb;
}

/* Header */

header {
  display: flex;
  align-items: center;
  padding: 8px 24px;
  background-color: #ffffff;
  border-bottom: 1px solid #dddddd;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
}

.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.logo img {
  height: 75px;
  display: block;
}

header [role="button"] {
  margin-left: 16px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: bold;
  text-transform: uppercase;
  text-decoration: none;
  color: #ffffff;
  background-color: #f42a39;
  border: 1px solid #f42a39;
  border-radius: 999px;
  cursor: pointer;
}

header [role="button"]:hover {
  background-color: #c3202c;
  border-color: #c3202c;
}

header h1 {
  margin: 0 0 0 auto;
  font-size: 14px;
  font-weight: normal;
  color: #666666;
  white-space: nowrap;
}

/* Hero section */

.hero {
  background-color: #002399;   /* blue */
  color: #ffffff;
  padding: 32px 24px;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.hero-tag {
  margin: 0 0 6px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero h1 {
  margin: 0 0 8px;
  font-size: 32px;
}

.hero-subtitle {
  margin: 0 0 16px;
  max-width: 640px;
  font-size: 15px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
}

.hero-meta span {
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid #ffffff;
}

/* Main layout */

.course-layout {
  max-width: 1100px;
  margin: 24px auto 32px;
  padding: 0 24px 32px;
}

.course-grid {
  display: grid;
  grid-template-columns: 2fr 1.2fr;
  gap: 24px;
}

/* Cards */

.card {
  background-color: #ffffff;
  border: 1px solid #dddddd;
  border-radius: 8px;
  padding: 20px;
}

.card h2 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 20px;
  color: #002399;
}

.card h3 {
  margin-top: 16px;
  margin-bottom: 8px;
  font-size: 16px;
  color: #002399;
}

.card p {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 14px;
}

.card ul {
  margin-top: 4px;
  margin-bottom: 10px;
  padding-left: 18px;
  font-size: 14px;
}

/* Quick facts card */

.card-facts {
  align-self: flex-start;
}

.card-facts ul {
  list-style: none;
  padding-left: 0;
}

.card-facts li {
  margin-bottom: 6px;
}

/* Online resources list */

.link-list {
  list-style: none;
  padding-left: 0;
}

.link-list li {
  margin-bottom: 4px;
}

.link-list a {
  color: #002399;
  text-decoration: none;
}

.link-list a:hover {
  text-decoration: underline;
}

/* Footer */

.site-footer {
  border-top: 1px solid #dddddd;
  background-color: #ffffff;
  padding: 12px 24px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  font-size: 12px;
  color: #777777;
  text-align: center;
}

/* Responsive */

@media (max-width: 900px) {
  header {
    flex-wrap: wrap;
  }

  header h1 {
    margin-top: 8px;
    margin-left: 0;
    width: 100%;
  }

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

@media (max-width: 600px) {
  .hero {
    padding: 24px 16px;
  }

  .course-layout {
    padding: 0 16px 24px;
  }

  .card {
    padding: 16px;
  }
}


/* container for all grade buttons */
.grade-dropdown {
  display: flex;
  gap: 16px;
}

/* one wrapper per button + its menu */
.grade-group {
  position: relative;
}

/* menu */
.grade-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 6px;
  min-width: 230px;
  background-color: #ffffff;
  border: 1px solid #dddddd;
  border-radius: 8px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  padding: 6px 0;
  display: none;
  z-index: 1000;
}

/* links in menu */
.grade-menu a {
  display: block;
  padding: 6px 12px;
  font-size: 13px;
  text-decoration: none;
  color: #002399;
  text-align: left;
  white-space: nowrap;
}

.grade-menu a:hover {
  background-color: #f5f6fb;
}

/* show menu while hovering its button or the menu itself */
.grade-group:hover .grade-menu,
.grade-group:focus-within .grade-menu,
.grade-menu:hover {
  display: block;
}