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14px;font-size:13px}.discouraged-action{border-color:#dfc46f;background:#fff9e8;color:#765c16}.discouraged-action:hover{border-color:#c9a83f;background:#fff3cf}.master-status{margin:12px 0 0;color:#6d8194;font-size:12px}.workspace{display:grid;grid-template-columns:minmax(0,1fr);gap:16px;max-width:1480px;margin:0 auto}.board-wrap{overflow:auto;border:1px solid rgba(81,115,153,.18);border-radius:8px;background:#ffffffb3;box-shadow:0 16px 38px #2f4b6d1f}.tier-board{min-width:760px;padding:16px}.empty-board{display:grid;min-height:120px;place-items:center;border:1px dashed rgba(55,99,143,.28);color:#7a899b;font-weight:700}.tier-row{display:grid;grid-template-columns:112px minmax(0,1fr);min-height:96px}.tier-label{display:flex;align-items:center;justify-content:center;border:1px solid rgba(29,42,62,.22);color:#1d2535;font-size:18px;font-weight:800}.tier-row.is-grouped .tier-label{box-shadow:inset 4px 0 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img,.placeholder-icon{width:100%;height:100%}.student-icon img{display:block;object-fit:cover}.student-icon.is-muted img,.student-icon.is-muted .placeholder-icon{filter:grayscale(1) brightness(.72);opacity:.58}.placeholder-icon{display:grid;place-items:center;background:linear-gradient(135deg,#2d81c52e,#c07edc33),repeating-linear-gradient(135deg,#ffffff8c 0,#ffffff8c 8px,#fff3 8px,#fff3 16px);color:#2f6796;font-weight:900}.empty-tier{display:inline-flex;align-items:center;min-height:44px;color:#93a1b4;font-weight:700}.inspector{position:fixed;z-index:30;width:min(300px,calc(100vw - 24px));max-height:calc(100vh - 24px);overflow:auto;padding:16px;border:1px solid rgba(81,115,153,.18);border-radius:8px;background:#fff;box-shadow:0 18px 46px #243f5e3d}.inspector-header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.inspector h2{margin:0;color:#1e3d5c;font-size:18px}.close-inspector-button{display:grid;width:32px;height:32px;flex:0 0 auto;place-items:center;padding:0;border:1px solid rgba(55,99,143,.2);border-radius:50%;background:#f4f8fb;color:#52677c;cursor:pointer;font-size:22px;line-height:1}.selected-preview{display:grid;grid-template-columns:auto minmax(0,1fr);gap:12px;align-items:center;margin-bottom:14px}.preview-icon{overflow:hidden;border:1px solid rgba(39,52,76,.2);border-radius:8px}.preview-icon img{width:100%;height:100%;object-fit:cover}.selected-preview strong,.selected-preview span{display:block}.selected-preview strong{overflow-wrap:anywhere;color:#243b55}.selected-preview span{margin-top:4px;color:#617086;font-size:13px}.field{display:grid;gap:6px;color:#40546d;font-size:13px;font-weight:700}.field select{width:100%;min-height:38px;border:1px solid rgba(55,99,143,.24);border-radius:8px;background:#f8fbff;color:#263248}.inspector .field+.field{margin-top:10px}.danger-button{width:100%;min-height:38px;margin-top:12px;border:1px solid rgba(206,72,86,.28);border-radius:8px;background:#fff3f5;color:#a53745;cursor:pointer;font-weight:800}.hint{margin:0;color:#6c7a8c;font-size:14px;line-height:1.6}@media(max-width:980px){.toolbar-main{align-items:flex-start;flex-direction:column}.primary-actions{width:100%}.display-settings-panel,.quick-guide-panel{grid-template-columns:1fr}.display-settings-panel .panel-section+.panel-section{border-top:1px solid #e3ebf1;border-left:0}.workspace{grid-template-columns:1fr}.group-builder{grid-template-columns:1fr minmax(160px,220px) auto}}@media(max-width:640px){.app-shell{padding:10px}.toolbar-main{gap:14px;padding:13px}.tier-brand-mark{width:43px;height:43px}.brand-block h1{font-size:19px}.primary-actions{display:grid;grid-template-columns:minmax(0,1fr)}.guide-preparation{grid-template-columns:1fr;gap:20px;padding:22px 18px}.guide-preparation-actions{min-width:0}.guide-flow{grid-template-columns:1fr;justify-items:start;gap:7px;padding-left:8px}.guide-flow 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