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var(--sum-primary);outline-offset:2px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}:focus-visible{outline:2px solid var(--sum-primary);outline-offset:2px;border-radius:4px}@media (prefers-reduced-motion:reduce){*,::after,::before{animation-duration:0s!important;transition-duration:0s!important}}@media (prefers-contrast:more){:root{--sum-rule:rgba(245, 239, 224, 0.30);--sum-rule-strong:rgba(245, 239, 224, 0.50)}[data-theme=light]{--sum-rule:#B8B09C;--sum-rule-strong:#8A8270}}@media (max-width:1100px){.sum-layout{grid-template-columns:260px 1fr;gap:28px;padding:14px 24px 64px}.sum-pagehead{padding:28px 24px 12px}}@media (max-width:900px){.sum-layout{grid-template-columns:1fr;gap:16px;padding:12px 16px 60px}.sum-pagehead{padding:22px 16px 8px}.sum-rail{position:static;max-height:none}.sum-sidebar{max-height:60vh}.sum-chapter{margin-bottom:40px}.sum-chapter-title{font-size:1.4rem}.sum-concept-card{padding:18px}.sum-concept-title{font-size:1.1rem}.sum-concept-card,.sum-concept-title{scroll-margin-top:110px}}@media (max-width:480px){.sum-subject-btn{padding:8px 16px;font-size:.9rem}.sum-title{font-size:1.7rem}}.sum-topic-btn.sum-topic-locked{opacity:.65;cursor:pointer}.sum-topic-btn.sum-topic-locked:hover{opacity:.9}.sum-topic-btn.sum-topic-locked .sum-topic-name{color:var(--text-secondary,#94a3b8)}.sum-topic-btn.sum-topic-locked .sum-topic-count{background:0 0;font-size:.95rem}