:root{--white:#fff;--canvas:#f4f7fa;--surface:#fff;--surface-muted:#eef3f7;--navy:#082b5e;--navy-strong:#061e42;--text:#10233f;--muted:#5d6c80;--line:#d6dee8;--blue:#155ece;--amber:#e97800;--amber-text:#9a4600;--amber-soft:#fff3e2;--green:#12805c;--red:#c93632;--red-soft:#fff0ef;--shadow:0 10px 30px #082b5e1f;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-family:Microsoft YaHei UI,PingFang SC,system-ui,sans-serif}*{box-sizing:border-box}html,body{background:var(--canvas);min-height:100%;color:var(--text);margin:0}button,input,select{font:inherit;color:inherit}button,select,input{outline:none}button:focus-visible,select:focus-visible,input:focus-visible{box-shadow:0 0 0 3px #155ece3d;border-color:var(--blue)!important}button:disabled{cursor:not-allowed;opacity:.48}.chrona-app{background:var(--white);grid-template-rows:64px minmax(0,1fr) 36px;min-width:0;min-height:100vh;display:grid}.topbar{border-bottom:1px solid 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var(--line);background:var(--white);cursor:pointer;border-radius:8px;place-items:center;width:40px;height:40px;display:inline-grid}.icon-button:hover{background:var(--surface-muted);border-color:#b8c5d4}.button{cursor:pointer;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;gap:8px;min-height:40px;padding:0 15px;font-size:14px;font-weight:700;display:inline-flex}.button.primary{color:var(--white);background:var(--blue)}.button.primary:hover{background:#0c4fac}.button.secondary{color:var(--navy);background:var(--white);border-color:var(--line)}.button.secondary:hover{background:var(--surface-muted)}.workspace{grid-template-rows:72px minmax(0,1fr);min-width:0;min-height:0;display:grid;position:relative;overflow:hidden}.controlbar{border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:14px 20px;display:flex}.controlbar select{border:1px solid var(--line);background:var(--white);border-radius:8px;min-width:210px;height:42px;padding:0 12px;font-weight:680}.controlbar>.button.primary{margin-left:auto}.week-control{border:1px solid var(--line);border-radius:8px;align-items:center;display:flex}.week-control .icon-button{border:0;border-radius:7px}.controlbar .week-control select{border:0;border-left:1px solid var(--line);border-right:1px solid var(--line);text-align:center;min-width:116px;height:40px;color:var(--navy);font-variant-numeric:tabular-nums;cursor:pointer;border-radius:0;padding:0 30px 0 12px;font-size:15px;font-weight:750}.term-status-badge{color:var(--amber-text);background:var(--amber-soft);white-space:nowrap;border:1px solid #e7c18b;border-radius:999px;padding:5px 9px;font-size:11px;font-weight:750}.schedule-scroll{background:var(--white);min-width:0;min-height:0;overflow:auto}.schedule-grid{grid-template-rows:70px repeat(11,minmax(62px,1fr));grid-template-columns:138px repeat(7,minmax(130px,1fr));min-width:1060px;min-height:790px;display:grid;position:relative}.schedule-grid[data-has-untimed-day=true]{grid-template-rows:70px minmax(68px,auto) repeat(11,minmax(62px,1fr));min-height:858px}.grid-corner,.day-header,.period-label,.grid-cell{border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--white)}.grid-corner{z-index:8;color:var(--muted);place-items:center;font-size:12px;display:grid;position:sticky;top:0;left:0}.day-header{z-index:6;flex-direction:column;justify-content:center;align-items:center;gap:4px;display:flex;position:sticky;top:0}.day-header strong{color:var(--navy);font-size:15px}.day-header span{color:var(--muted);font-variant-numeric:tabular-nums;font-size:12px}.day-header[data-today=true]{color:var(--amber);box-shadow:inset 0 -2px var(--amber);background:#fffaf3}.day-header[data-today=true] strong,.day-header[data-today=true] 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