.course-hero {
  padding: 24px 28px;
  border-radius: 6px;
  border: 1px solid #e7e5e4;
  background: #f8f7f6;
  border-left: 4px solid var(--accent);
}

.course-hero h2 {
  font-size: 24px;
  margin-bottom: 6px;
  color: #1c1917;
}

.course-hero p {
  color: #57534e;
}

.course-meta-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.meta-item {
  border: 1px solid #e7e5e4;
  border-radius: 4px;
  background: #fff;
  padding: 10px 12px;
}

.meta-label {
  display: block;
  font-size: 11px;
  color: #a8a29e;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 2px;
}

.meta-value {
  font-size: 14px;
  color: #1c1917;
  font-weight: 600;
}

.callout-box {
  margin-top: 14px;
  border: 1px solid #e7e5e4;
  border-left: 4px solid var(--accent);
  border-radius: 4px;
  background: #fafaf9;
  padding: 12px 14px;
  color: #57534e;
  font-size: 14px;
}

.textbook-box {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.textbook-media {
  flex: 0 0 118px;
}

.textbook-media img {
  display: block;
  width: 100%;
  border: 1px solid #d6d3d1;
  border-radius: 4px;
  background: #fff;
}

.textbook-content {
  flex: 1;
  min-width: 0;
}

.textbook-source {
  margin-top: 6px;
  font-size: 12px;
  color: #78716c;
}

.textbook-source a {
  color: var(--accent);
}

.course-links {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid #e7e5e4;
  border-radius: 4px;
}

.course-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
}

.course-table th,
.course-table td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid #e7e5e4;
  color: #44403c;
  font-size: 14px;
  vertical-align: top;
}

.course-table th {
  font-size: 12px;
  color: #57534e;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: #fafaf9;
  font-weight: 600;
}

.course-table tr:last-child td {
  border-bottom: none;
}

#materials .course-table td a {
  display: inline-flex;
  align-items: center;
  padding: 1px 7px;
  margin: 0 2px 4px 0;
  border: 1px solid #d6d3d1;
  border-radius: 999px;
  background: #fff;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
}

#materials .course-table td a::before {
  content: "[";
  margin-right: 1px;
}

#materials .course-table td a::after {
  content: "]";
  margin-left: 1px;
}

#materials .course-table td a:hover {
  background: #eef2f7;
  border-color: var(--accent);
  color: var(--accent-hover);
}

.status-pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  padding: 1px 8px;
  border-radius: 3px;
  white-space: nowrap;
}

.status-open {
  color: #059669;
  background: #ecfdf5;
}

.status-soon {
  color: #d97706;
  background: #fffbeb;
}

.status-closed {
  color: #dc2626;
  background: #fef2f2;
}

.notice-list {
  display: grid;
  gap: 10px;
}

.notice-item {
  border: 1px solid #e7e5e4;
  border-radius: 4px;
  padding: 12px 14px;
  background: #fff;
}

.notice-date {
  color: #a8a29e;
  font-size: 13px;
  margin-bottom: 2px;
}

.notice-title {
  color: #1c1917;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
}

.notice-text {
  color: #57534e;
  font-size: 14px;
}

.inline-code {
  display: inline;
  background: #f5f5f4;
  border: 1px solid #e7e5e4;
  color: #1c1917;
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 13px;
  font-family: Consolas, "SFMono-Regular", monospace;
}

@media (max-width: 1000px) {
  .course-meta-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .course-hero {
    padding: 18px;
  }

  .textbook-box {
    display: block;
  }

  .textbook-media {
    max-width: 120px;
    margin: 0 0 10px;
  }

  .course-hero h2 {
    font-size: 20px;
  }

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