.board-subject-tiles{margin-top:8px}
.board-lesson-action{display:flex;justify-content:flex-start;margin-bottom:12px}
.board-archive-list{display:grid;gap:12px}
.board-exam-groups{display:grid;gap:9px;margin:12px 0 20px;padding:14px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}
.board-exam-groups h2{margin:0 0 4px;font-size:18px}
.board-exam-group{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:9px 12px;border:1px solid var(--line);border-radius:10px;background:#f8fafb}
.board-exam-group span{display:flex;flex-direction:column;gap:3px}
.board-exam-group small{color:var(--muted)}
.board-archive-card{display:grid;grid-template-columns:54px minmax(0,1fr) auto;gap:16px;align-items:center;padding:18px;border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:0 8px 24px #0b1f330d}
.board-archive-card h3{margin:0 0 6px;font-size:17px}
.board-archive-card p{margin:0;color:var(--muted);font-size:13px}
.board-archive-card .actions{display:flex;flex-wrap:wrap;gap:6px}
.board-archive-icon{display:grid;place-items:center;width:52px;height:52px;border-radius:13px;background:var(--accent-soft);color:var(--primary);font-size:27px}
.standalone-board{padding:18px;border:1px solid var(--line);border-radius:20px;background:var(--surface);box-shadow:0 12px 34px #0b1f3310}
.standalone-board:fullscreen{width:100vw;height:100vh;box-sizing:border-box;overflow:auto;border-radius:0;background:var(--surface)}
.standalone-board:fullscreen #whiteboardWrap{height:calc(100vh - 320px)}
.board-title-row{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin-bottom:13px}
.board-title-row label{font-weight:900;color:var(--navy)}
.board-title-row input{flex:1;min-width:180px;max-width:460px;border:1px solid var(--line);border-radius:10px;padding:9px 11px;font:inherit}
.board-title-row span{margin-inline-start:auto;color:var(--muted);font-size:12px}
.board-pro-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:5px}
.board-tool-label{display:flex;align-items:center;gap:5px;padding:4px 7px;border:1px solid var(--line);border-radius:9px;background:#fff;font-size:12px;font-weight:800}
.board-tool-label select{max-width:110px;border:0;background:transparent;font:inherit;color:var(--navy)}
.board-tool-label input[type=range]{width:76px}
.board-attachments-controls{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:8px 0}
.board-upload{cursor:pointer}
.board-attachment-list{display:grid;gap:5px;margin:5px 0 10px}
.board-file{display:flex;align-items:center;gap:8px;padding:7px 9px;border:1px solid var(--line);border-radius:10px;background:#f8fafb}
.board-file>span{font-size:19px;color:var(--primary)}
.board-file strong{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:12px}
.board-file small{white-space:nowrap;color:var(--muted)}
.modern-board-calc{width:min(100%,370px);background:#eff5f7;border:1px solid var(--line)}
.board-calc-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:7px}
.modern-board-calc .calc-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}
.modern-board-calc .calc-grid button{height:39px;cursor:pointer;font-size:13px}
.standalone-board #whiteboardWrap{height:min(66vh,760px);min-height:400px;overflow-y:auto!important;overflow-x:hidden!important;touch-action:pan-y}
.standalone-board .v12-board-surface{height:1400px;min-height:1400px}
.standalone-board #whiteboardCanvas{display:block;width:100%;height:1400px;touch-action:none;background:#fff}
@media(max-width:720px){.board-archive-card{grid-template-columns:42px 1fr;gap:8px}.board-archive-icon{width:42px;height:42px}.board-archive-card .actions{grid-column:1/-1}.standalone-board{padding:9px}.board-title-row span{margin-inline-start:0}.board-file{flex-wrap:wrap}.board-file strong{min-width:60%}.standalone-board #whiteboardWrap{min-height:310px}}