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var(--transition-fast)}.avatar-option-btn:hover{border-color:var(--accent-teal);transform:scale(1.08)}.avatar-option-btn.selected{border-color:var(--accent-teal);background:#14b8a626;box-shadow:var(--shadow-glow)}.grammar-hub-page{animation:fadeIn var(--transition-normal) ease-out}.grammar-tabs-container{display:flex;flex-wrap:wrap;gap:.5rem}.grammar-tab-btn{font-size:.85rem;font-weight:600;padding:.45rem .9rem;transition:all var(--transition-fast)}.grammar-rule-card{transition:transform var(--transition-fast),box-shadow var(--transition-fast)}.grammar-rule-card:hover{box-shadow:var(--shadow-md)}.grammar-example-box{transition:background var(--transition-fast)}.grammar-example-box:hover{background:var(--bg-secondary)!important}.synonym-chip-grid{display:flex;flex-wrap:wrap;gap:.4rem}.synonym-navigate-btn{transition:all var(--transition-fast);cursor:pointer}.synonym-navigate-btn:hover{border-color:var(--accent-teal);transform:translateY(-1px);background:#14b8a61f}.thematic-island-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:.45rem}.island-word-navigate-btn{transition:all var(--transition-fast);cursor:pointer;border-radius:var(--radius-sm)}.island-word-navigate-btn:hover{border-color:var(--accent-emerald)!important;transform:translateY(-2px);background:#10b9811a!important;box-shadow:0 2px 8px #00000026}.time-grammar-callout{border-radius:var(--radius-md);box-shadow:var(--shadow-sm);transition:border-color var(--transition-fast)}.time-grammar-callout:hover{border-color:#38bdf8}