.theory-section { padding-block: 72px; background: #f7f9fc; color: var(--ink); border-block: 1px solid var(--line); }
.theory-heading { margin-bottom: 30px; }
.theory-section .section-kicker { color: var(--blue); }
.theory-heading h2 { font-size: clamp(2rem, 3.2vw, 2.75rem); }
.theory-heading p { margin-top: 15px; color: var(--muted); font-size: 1rem; }
.theory-location { margin-top: 18px; color: var(--muted); font-size: .875rem; line-height: 1.6; }
.theory-location a { color: var(--blue); }
.theory-location a:hover { color: var(--blue-dark); }
.theory-planner { border: 1px solid var(--line); border-radius: 16px; background: white; overflow: hidden; }
.theory-table { width: 100%; border-collapse: collapse; text-align: left; font-size: 1rem; }
.theory-table th { padding: 18px 26px; background: #f8faff; border-bottom: 1px solid var(--line); color: var(--muted); font-weight: 600; font-size: .875rem; }
.theory-table th:first-child { width: 40%; }
.theory-table th:nth-child(2) { width: 21%; }
.theory-table th:nth-child(3) { width: 21%; }
.theory-table td { padding: 23px 26px; vertical-align: middle; }
.theory-table tbody tr + tr { border-top: 1px solid var(--line); }
.theory-date { display: block; font-family: var(--body); font-size: 1rem; font-weight: 650; line-height: 1.5; }
.theory-course-name { display: block; color: var(--muted); font-size: .875rem; line-height: 1.5; margin-top: 5px; }
.theory-time { white-space: nowrap; }
.theory-seats { display: inline-block; color: var(--blue-dark); background: var(--mist); padding: 6px 10px; border-radius: 6px; font-size: .8125rem; font-weight: 550; white-space: nowrap; }
.theory-seats.is-full { background: #f0f2f5; color: #697386; }
.theory-table .theory-book { min-height: 44px; padding: 10px 19px; font-size: .875rem; white-space: nowrap; }
.theory-book-unavailable { display: inline-flex; justify-content: center; align-items: center; min-height: 44px; padding: 10px 15px; border: 1px solid var(--line); border-radius: 8px; color: var(--muted); background: #f8f9fb; font-size: .875rem; white-space: nowrap; }
.theory-mobile-label { display: none; }
.theory-empty { padding: 46px 24px 48px; text-align: center; }
.theory-empty-icon { display: grid; place-items: center; margin: 0 auto 18px; width: 52px; height: 52px; border: 1px solid var(--line); border-radius: 12px; color: var(--blue); background: #f8faff; }
.theory-empty-icon .icon { width: 25px; height: 25px; fill: none; stroke: currentColor; }
.theory-empty h3 { font-family: var(--body); font-size: 1.25rem; font-weight: 650; line-height: 1.5; }
.theory-empty p { color: var(--muted); font-size: 1rem; margin-top: 9px; }
.theory-empty[hidden] { display: none; }
@media (max-width: 1000px) {
  .theory-table th, .theory-table td { padding-inline: 18px; }
}
@media (max-width: 760px) {
  .theory-section { padding-block: 52px; }
  .theory-heading { margin-bottom: 24px; }
  .theory-heading h2 { font-size: 2rem; }
  .theory-table, .theory-table tbody { display: block; }
  .theory-table thead { display: none; }
  .theory-table tbody tr { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 12px; padding: 24px 22px; }
  .theory-table td { display: block; padding: 0; min-width: 0; }
  .theory-table td:first-child, .theory-table td:last-child { grid-column: 1 / -1; }
  .theory-mobile-label { display: block; margin-bottom: 7px; color: var(--muted); font-size: .8125rem; }
  .theory-table td:first-child .theory-mobile-label { display: none; }
  .theory-book, .theory-book-unavailable { width: 100%; }
  .theory-empty { padding: 34px 22px 36px; }
}