.ui-shell{--bg:#f5f6f8;--sidebar:#f2f3f5;--surface:#fff;--text:#1d1d1f;--secondary:#626873;--tertiary:#8e8e93;--line:#3c3c4326;--line-strong:#3c3c4342;--blue:#2d68d2;--blue-soft:#eef3ff;--blue-border:#2d68d224;--green:#3f7c59;--green-soft:#f1f8f4;--red:#985042;--red-soft:#fff4f2;--amber:#8b6a2b;--amber-soft:#fff8ea;--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft 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p{max-width:350px;margin:0;font-size:12px;line-height:1.6}.empty-mark{color:var(--tertiary);margin-bottom:8px;font-size:26px;line-height:1}.reference-course-picker,.grade-course-picker{align-items:end;gap:10px;margin:0 0 18px;display:flex}.reference-course-picker label,.grade-course-picker label{color:var(--secondary);gap:6px;font-size:12px;display:grid}.reference-next-class{padding:18px}.reference-next-class h3{margin:0 0 8px;font-size:18px}.reference-next-class p{color:var(--secondary);margin:7px 0 16px;font-size:13px}.reference-next-class>b{font-size:15px;display:block}.reference-class-time{letter-spacing:-.04em;margin:8px 0 12px;font-size:30px;line-height:1.2;display:block}.reference-canvas-grid{background:#e8ebf0;border-radius:14px;grid-template-columns:1fr 1fr;gap:12px;height:100%;padding:16px;display:grid}.reference-canvas-grid span{background:#fff;border-radius:9px;display:block}.reference-day-empty{color:var(--tertiary);margin-top:12px;font-size:11px;display:block}.ui-shell 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