.header{border-bottom:1px solid var(--color-border);box-sizing:border-box;background:#fff;justify-content:space-between;align-items:center;height:64px;padding:0 32px;display:flex}.header__logo{color:var(--color-text);font-size:1.2rem;font-weight:600;text-decoration:none}.header__nav{align-items:center;gap:24px;display:flex}.header__link{color:#000;font-size:.9rem;font-weight:500;text-decoration:none}.header__link:hover{color:var(--color-text);text-decoration:none}.header__logout{cursor:pointer;background:0 0;border:0;padding:0;font-family:inherit}.header__logout:hover{text-decoration:underline}@media (width<=700px){.header{gap:12px;height:auto;min-height:64px;padding:12px 16px}.header__nav{flex-wrap:wrap;justify-content:flex-end;gap:12px}.header__link{font-size:.8rem}}.math-class-table-wrap{width:min(100%,520px);margin-top:8px;overflow-x:auto}.math-class-table{border-collapse:collapse;width:100%;color:var(--color-text);text-align:center;background:#fff}.math-class-table td{border:1px 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th:not(:first-child){font-size:1rem}.schedule-grid thead th:first-child,.schedule-grid tbody th{width:112px}.schedule-grid tbody th{color:#73777c;white-space:nowrap;vertical-align:top;padding:0 14px;font-size:.75rem;font-weight:500}.schedule-grid__row-heading{grid-template-rows:repeat(7,63px);display:grid}.schedule-grid__row-label{flex-direction:column;justify-content:center;gap:5px;display:flex}.schedule-grid__row-heading time{color:#85898e;font-size:.7rem;line-height:1.2}.schedule-grid tbody td{height:441px;padding:0}.schedule-grid__timeline{background:repeating-linear-gradient(#0000 0 62px,#e5e5e5 62px 63px);height:441px;position:relative;overflow:visible}.schedule-grid tr>:last-child{border-right:0}.schedule-grid tbody tr:last-child>*{border-bottom:0}.schedule-grid__day-hovered,.schedule-grid__day-hovered .schedule-grid__lesson--non-standard{background-color:#f3f4f6}.schedule-grid__lesson 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var(--color-accent);outline-offset:3px;border-radius:3px}.schedule-grid__lesson-content{min-width:0;display:block}.schedule-grid__lesson-meta{color:#85898e;text-overflow:ellipsis;white-space:nowrap;margin-top:3px;font-size:.7rem;line-height:1.2;display:block;overflow:hidden}.schedule-grid__homework-badge,.schedule__homework-badge{color:#315da8;background:#e8f0fe;border-radius:4px;flex:none;padding:2px 5px;font-size:.65rem;font-weight:700;line-height:1.2}@media (width<=700px){.schedule-grid{min-width:1080px}}.file-drop-dialog{z-index:2000;background:#11182773;place-items:center;padding:16px;display:grid;position:fixed;inset:0}.file-drop-dialog__window{background:var(--color-bg);width:min(480px,100%);color:var(--color-text);border-radius:12px;padding:20px;box-shadow:0 20px 50px #00000040}.file-drop-dialog__head{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.file-drop-dialog__head h2{margin:0;font-size:1.15rem}.file-drop-dialog__close{width:32px;height:32px;color:var(--color-text-muted);cursor:pointer;background:0 0;border:0;border-radius:50%;font-size:1.4rem;line-height:1}.file-drop-dialog__close:hover{background:var(--color-bg-secondary)}.file-drop-dialog__zone{border:2px dashed var(--color-border);background:var(--color-bg-secondary);color:var(--color-text-muted);text-align:center;cursor:pointer;border-radius:10px;flex-direction:column;align-items:center;gap:6px;padding:40px 16px;transition:border-color .15s,background .15s;display:flex}.file-drop-dialog__zone strong{color:var(--color-text)}.file-drop-dialog__zone:hover,.file-drop-dialog__zone:focus-visible{border-color:var(--color-accent);outline:none}.file-drop-dialog__zone.is-dragging{border-color:var(--color-accent);background:#eff6ff}.file-drop-dialog__icon{color:var(--color-accent);font-size:2rem;line-height:1}.file-drop-dialog__hint{color:var(--color-text-muted);text-align:center;margin:12px 0 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