.classroom-page {
  display: grid;
  gap: 1rem;
}

.classroom-hero {
  position: relative;
  overflow: hidden;
  padding: 1.35rem 1.25rem;
  border: 1px solid color-mix(in srgb, var(--primary) 30%, var(--line));
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 92% 6%, color-mix(in srgb, var(--primary) 16%, transparent), transparent 46%),
    linear-gradient(165deg, color-mix(in srgb, var(--surface-strong) 92%, transparent), var(--surface));
}

.classroom-hero h1 {
  margin: 0.35rem 0 0.45rem;
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  line-height: 1.15;
}

.classroom-hero p {
  max-width: 74ch;
  margin: 0;
  color: var(--text-soft);
  line-height: 1.55;
}

.classroom-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.85rem;
}

.classroom-card {
  display: grid;
  align-content: start;
  gap: 0.65rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 100% 0%, color-mix(in srgb, var(--primary) 10%, transparent), transparent 50%),
    linear-gradient(160deg, color-mix(in srgb, var(--surface) 94%, transparent), color-mix(in srgb, var(--field-bg) 86%, transparent));
  box-shadow: var(--shadow-md);
}

.classroom-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.classroom-date {
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.classroom-card h2 {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.3;
}

.classroom-card h2 a {
  color: var(--text);
  text-decoration: none;
}

.classroom-card h2 a:hover {
  color: var(--primary);
}

.classroom-card p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.5;
}

.classroom-instructor {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-soft);
  font-size: 0.82rem;
}

.classroom-instructor-mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--button-bg);
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.classroom-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 0.15rem;
}

.classroom-price {
  display: flex;
  align-items: baseline;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.classroom-price strong {
  font-family: var(--font-mono);
  font-size: 1.05rem;
}

.classroom-price-old {
  color: var(--text-soft);
  font-size: 0.76rem;
  text-decoration: line-through;
}

.classroom-discount-note {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  width: max-content;
  max-width: 100%;
  padding: 0.22rem 0.55rem;
  border: 1px solid color-mix(in srgb, var(--primary) 45%, var(--line));
  border-radius: 999px;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 9%, transparent);
  font-size: 0.76rem;
}

.classroom-empty {
  padding: 1.2rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--text-soft);
  text-align: center;
}

.classroom-course {
  display: grid;
  gap: 0.9rem;
}

.classroom-course-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.classroom-course-head h1 {
  margin: 0.3rem 0 0.35rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.15;
}

.classroom-course-head p {
  max-width: 72ch;
  margin: 0;
  color: var(--text-soft);
  line-height: 1.55;
}

.classroom-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.classroom-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(250px, 0.8fr);
  gap: 0.9rem;
  align-items: start;
}

.classroom-panel {
  display: grid;
  gap: 0.65rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--surface) 94%, transparent);
}

.classroom-panel h2 {
  margin: 0;
  font-size: 1.05rem;
}

.classroom-description {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.65;
  white-space: pre-line;
}

.classroom-session-list {
  display: grid;
  gap: 0.5rem;
}

.classroom-session-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.6rem;
  align-items: center;
  padding: 0.7rem;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: color-mix(in srgb, var(--field-bg) 58%, transparent);
}

.classroom-session-row h3 {
  margin: 0 0 0.15rem;
  font-size: 0.95rem;
}

.classroom-session-meta {
  color: var(--text-soft);
  font-size: 0.78rem;
}

.classroom-enroll-form {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin: 0;
}

.classroom-enroll-form input {
  width: 150px;
  min-height: 2.2rem;
}

.classroom-enroll-form button {
  white-space: nowrap;
}

.classroom-status {
  display: inline-flex;
  align-items: center;
  width: max-content;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.classroom-status.pending {
  color: #fbbf24;
  border-color: color-mix(in srgb, #fbbf24 50%, var(--line));
  background: color-mix(in srgb, #fbbf24 10%, transparent);
}

.classroom-status.confirmed,
.classroom-status.completed,
.classroom-status.attended {
  color: #22c55e;
  border-color: color-mix(in srgb, #22c55e 50%, var(--line));
  background: color-mix(in srgb, #22c55e 10%, transparent);
}

.classroom-status.failed,
.classroom-status.cancelled {
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 50%, var(--line));
  background: color-mix(in srgb, var(--danger) 10%, transparent);
}

.classroom-status.review,
.classroom-status.expired {
  color: #fb923c;
  border-color: color-mix(in srgb, #fb923c 50%, var(--line));
  background: color-mix(in srgb, #fb923c 10%, transparent);
}

.classroom-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}

.classroom-table th,
.classroom-table td {
  padding: 0.55rem 0.45rem;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}

.classroom-table th {
  color: var(--text-soft);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.classroom-table tr:last-child td {
  border-bottom: 0;
}

.classroom-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.classroom-summary-grid > div {
  display: grid;
  gap: 0.12rem;
  padding: 0.6rem 0.65rem;
  border: 1px solid var(--line-soft);
  border-radius: 9px;
  background: color-mix(in srgb, var(--field-bg) 55%, transparent);
}

.classroom-summary-grid span {
  color: var(--text-soft);
  font-size: 0.72rem;
}

.classroom-join {
  display: grid;
  gap: 0.55rem;
  padding: 0.8rem;
  border: 1px solid color-mix(in srgb, #22c55e 45%, var(--line));
  border-radius: 10px;
  background: color-mix(in srgb, #22c55e 8%, transparent);
}

.classroom-admin-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.classroom-admin-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
}

.classroom-admin-grid .full {
  grid-column: 1 / -1;
}

.classroom-admin-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

@media (max-width: 860px) {
  .classroom-detail-grid,
  .classroom-admin-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .classroom-session-row,
  .classroom-summary-grid {
    grid-template-columns: 1fr;
  }

  .classroom-enroll-form input {
    width: 100%;
    flex: 1 1 100%;
  }
}