/* Classroom home only. Shared group data and detail pages retain their owners. */
body.classroom-practice .module-header p { color: var(--muted); font-size: 15px; line-height: 1.7; }
body.classroom-practice .section-title { color: var(--text); font-size: 18px; font-weight: 500; line-height: 1.6; letter-spacing: 0; text-transform: none; margin: 24px 0 16px; }
body.classroom-practice .mode-grid { gap: 20px; }
body.classroom-practice .mode-card,
body.classroom-practice .class-card,
body.classroom-practice .joined-card,
body.classroom-practice .empty-state { background: var(--practice-card); border-color: var(--border); border-radius: 16px; box-shadow: none; }
body.classroom-practice .mode-card { min-height: 200px; padding: 24px; align-items: flex-start; text-align: start; gap: 16px; }
body.classroom-practice .mode-card:hover { background: var(--surface2); border-color: var(--border2); }
body.classroom-practice .mode-card .mode-icon { background: var(--practice-accent-wash); color: var(--sky); border-radius: 14px; }
body.classroom-practice .mode-icon svg,
body.classroom-practice .mode-banner-icon svg { stroke: var(--sky); }
body.classroom-practice .mode-card .mode-title { color: var(--text) !important; font-size: 22px; font-weight: 500; line-height: 1.5; }
body.classroom-practice .mode-desc { color: var(--muted); font-size: 15px; line-height: 1.7; }
body.classroom-practice .mode-banner { flex-wrap: wrap; gap: 12px; padding: 20px; border: 1px solid var(--border); border-radius: 16px; background: var(--practice-card); }
body.classroom-practice .mode-label { color: var(--text) !important; font-size: 16px; font-weight: 500; line-height: 1.6; letter-spacing: 0; text-transform: none; margin: 0; }
body.classroom-practice .btn { min-height: 48px; border-radius: 12px; padding: 12px 16px; color: var(--muted); background: transparent; border-color: var(--border2); font-size: 14px; font-weight: 500; line-height: 1.6; }
body.classroom-practice .btn:hover { color: var(--text); background: var(--surface2); }
html[data-theme] body.classroom-practice .btn.teacher,
html[data-theme] body.classroom-practice .btn.student,
body.classroom-practice .class-card-action { color: var(--practice-on-accent) !important; background: var(--sky); border-color: var(--sky); font-weight: 600; }
html[data-theme] body.classroom-practice .btn.teacher:hover,
html[data-theme] body.classroom-practice .btn.student:hover,
body.classroom-practice .class-card-action:hover { background: var(--sky2); color: var(--practice-on-accent); }
html[data-theme] body.classroom-practice .btn.danger,
body.classroom-practice .class-manage-menu button.danger { color: var(--coral) !important; }
body.classroom-practice .btn:disabled { color: var(--muted) !important; background: var(--bg3) !important; border-color: var(--border) !important; opacity: 1; cursor: not-allowed; }
body.classroom-practice .class-card { padding: 24px; gap: 20px; }
body.classroom-practice .class-card-wrap .class-card { background: var(--practice-card); border-color: var(--border); }
body.classroom-practice .class-card-wrap .class-card:hover,
body.classroom-practice .class-card-wrap .class-card:focus-within { background: var(--practice-card); border-color: var(--border2); }
body.classroom-practice .class-icon,
body.classroom-practice .joined-icon { background: var(--practice-accent-wash); border-radius: 14px; }
body.classroom-practice .class-main { min-width: 0; }
body.classroom-practice .class-name,
body.classroom-practice .joined-title { color: var(--text); font-size: 22px; font-weight: 500; line-height: 1.5; overflow-wrap: anywhere; }
body.classroom-practice .class-meta { color: var(--muted); font-size: 14px; line-height: 1.7; margin-top: 8px; overflow-wrap: anywhere; }
body.classroom-practice .class-category-pill { color: var(--sky); background: var(--practice-accent-wash); border-color: var(--border); font-size: 12px; font-weight: 500; line-height: 1.6; padding: 5px 10px; }
body.classroom-practice .class-code-row { gap: 12px; flex-wrap: wrap; margin-top: 16px; }
body.classroom-practice .code-label { color: var(--text); font-size: 18px; letter-spacing: .08em; }
body.classroom-practice .code-copy-btn { min-height: 44px; padding: 10px 14px; color: var(--muted); background: var(--bg); border-color: var(--border2); border-radius: 12px; font-size: 14px; line-height: 1.6; }
body.classroom-practice .code-copy-btn:hover { color: var(--sky); background: var(--practice-accent-wash); }
body.classroom-practice .class-card-actions { gap: 12px; flex-wrap: wrap; }
body.classroom-practice .class-card-action { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; padding: 12px 16px; border-radius: 12px; font-size: 14px; line-height: 1.6; }
body.classroom-practice .class-manage-btn { width: 48px; height: 48px; color: var(--muted); background: var(--practice-card); border-color: var(--border2); border-radius: 12px; }
body.classroom-practice .class-manage-btn:hover { color: var(--text); background: var(--surface2); }
body.classroom-practice .class-manage-menu { background: var(--practice-card); border-color: var(--border2); border-radius: 12px; box-shadow: 0 8px 24px rgba(0,0,0,.12); padding: 6px; }
body.classroom-practice .class-manage-menu button { min-height: 44px; color: var(--text); font-size: 14px; font-weight: 500; line-height: 1.6; padding: 10px 14px; }
body.classroom-practice .class-manage-menu button:hover { background: var(--surface2); }
body.classroom-practice .archived-section { background: var(--practice-card); border-color: var(--border); border-radius: 16px; }
body.classroom-practice .archived-section summary { min-height: 48px; color: var(--muted); font-size: 15px; font-weight: 500; line-height: 1.6; padding: 16px; }
body.classroom-practice .class-card-wrap.is-archived .class-card { opacity: 1; }
body.classroom-practice .archived-badge { color: var(--muted); background: var(--bg); border-color: var(--border); font-size: 12px; font-weight: 500; }
body.classroom-practice .joined-card { padding: 24px; }
body.classroom-practice .joined-top { align-items: flex-start; }
body.classroom-practice .joined-top > div:last-child { min-width: 0; }
body.classroom-practice .hint-card { color: var(--muted); background: var(--practice-accent-wash); border-color: var(--border); border-radius: 16px; font-size: 14px; line-height: 1.7; padding: 20px; }
body.classroom-practice .empty-state { padding: 28px 24px; color: var(--muted); font-size: 15px; line-height: 1.7; }
body.classroom-practice .empty-state strong { color: var(--text); font-size: 20px; font-weight: 500; line-height: 1.6; margin-bottom: 12px; }
body.classroom-practice .modal-backdrop { z-index: 2200; align-items: center; padding: 24px; background: rgba(0,0,0,.55); }
body.classroom-practice .modal-panel { max-height: calc(100dvh - 48px); overflow-y: auto; overscroll-behavior: contain; background: var(--practice-card); border-color: var(--border); border-radius: 16px; box-shadow: 0 16px 48px rgba(0,0,0,.16); padding: 24px; }
body.classroom-practice .modal-head { align-items: flex-start; }
body.classroom-practice .modal-title { color: var(--text); font-size: 24px; font-weight: 500; line-height: 1.5; margin: 0; }
body.classroom-practice .close-btn { flex-shrink: 0; min-width: 44px; min-height: 44px; background: var(--bg); border-color: var(--border2); border-radius: 12px; }
body.classroom-practice .close-btn:disabled { color: var(--muted); background: var(--bg3); cursor: not-allowed; }
body.classroom-practice .field-label { color: var(--muted); font-size: 14px; font-weight: 500; line-height: 1.6; letter-spacing: 0; text-transform: none; margin: 16px 0 10px; }
body.classroom-practice .input { color: var(--text); background: var(--bg); border-color: var(--border2); min-height: 52px; padding: 14px 16px; font-size: 18px; font-weight: 400; line-height: 1.6; }
body.classroom-practice .input:focus { border-color: var(--sky); }
body.classroom-practice .input::placeholder { color: var(--muted); }
body.classroom-practice .input-help { color: var(--muted); font-size: 13px; line-height: 1.7; margin-top: 10px; }
body.classroom-practice .code-input { font-size: 22px; letter-spacing: .16em; }
body.classroom-practice .classroom-dialog-status { color: var(--coral); font-size: 14px; line-height: 1.7; margin-top: 16px; overflow-wrap: anywhere; }
body.classroom-practice .classroom-dialog-status:empty { display: none; }
html[data-theme] body.classroom-practice .toast { color: var(--text) !important; background: var(--practice-card); border-color: var(--border2); font-size: 14px; line-height: 1.7; box-shadow: 0 8px 24px rgba(0,0,0,.12); }
@media (max-width: 700px) {
  body.classroom-practice .mode-grid { grid-template-columns: minmax(0,1fr); }
  body.classroom-practice .class-card { flex-wrap: wrap; padding: 20px; }
  body.classroom-practice .class-main { flex-basis: calc(100% - 76px); }
  body.classroom-practice .class-card-actions { width: 100%; margin-left: 0; margin-right: 0; justify-content: flex-end; }
  body.classroom-practice .mode-banner .spacer { display: none; }
  body.classroom-practice .mode-label { flex-basis: calc(100% - 40px); }
  body.classroom-practice .mode-banner .btn { flex: 1; }
  body.classroom-practice .joined-actions { flex-direction: column; }
  body.classroom-practice .modal-backdrop { align-items: flex-end; padding: 12px; }
  body.classroom-practice .modal-panel { max-height: calc(100dvh - 24px); padding: 20px; }
}
html.pp-embedded-exercise body.classroom-practice .main-content { padding-top: 28px !important; }