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.icon{width:15px;height:15px}.chat-tools{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;display:flex}.chat{border-radius:var(--r-l);background:linear-gradient(180deg, var(--bg-soft), #fbfcfe);box-shadow:inset 0 0 0 1px var(--line);flex-direction:column;gap:12px;padding:18px 12px;display:flex}@media (width>=680px){.chat{padding:26px}}.msg{--who:#64748b;--who-soft:#eef2f7;max-width:92%;scroll-margin-top:calc(var(--sticky-top) + 90px);align-items:flex-end;gap:10px;display:flex}.msg[data-side=right]{flex-direction:row-reverse;align-self:flex-end}@media (width>=680px){.msg{max-width:78%}}.avatar{background:var(--who);color:#fff;width:38px;height:38px;font:800 .95rem/1 var(--head);box-shadow:0 0 0 3px #fff, var(--shadow-1);border-radius:50%;flex:none;place-items:center;display:grid;overflow:hidden}.avatar img{object-fit:cover;width:100%;height:100%}.bubble{min-width:0;box-shadow:var(--shadow-1), inset 0 0 0 1px var(--line);transition:box-shadow var(--ease), 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(width>=680px){.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}}.pattern{border-radius:var(--r);box-shadow:var(--shadow-2), inset 0 0 0 1px var(--line);background:#fff;align-content:start;gap:10px;padding:20px;display:grid}.pattern-top{justify-content:space-between;align-items:center;gap:10px;display:flex}.pattern-en{font:700 1.4rem/1.3 var(--head);letter-spacing:-.01em}.pattern-en b{color:var(--tone-ink)}.pattern-tr{color:var(--ink-2);font-weight:500}.pattern-note{color:var(--muted);font-size:.98rem}.rule{border-radius:var(--r);background:var(--gold-soft);box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--gold) 45%, transparent);grid-template-columns:auto minmax(0,1fr);align-items:start;gap:14px 16px;padding:20px;display:grid}.rule-icon{width:48px;height:48px;box-shadow:var(--shadow-1);background:#fff;border-radius:15px;place-items:center;font-size:1.6rem;display:grid}.rule-main{font:700 1.25rem/1.35 var(--head)}.rule-sub{font:600 1.05rem/1.4 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span{color:var(--muted);font-size:.92rem}.stat-tone{background:linear-gradient(150deg, var(--tone-soft), #fff);box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--tone) 30%, transparent)}.stat-tone b{color:var(--tone-ink)}.lib-actions{grid-template-columns:minmax(0,1fr);gap:12px;display:grid}@media (width>=680px){.lib-actions{grid-template-columns:repeat(2,minmax(0,1fr))}}.study-btn{border-radius:var(--r-l);text-align:left;cursor:pointer;color:#fff;background:radial-gradient(90% 140% at 100% 0%, color-mix(in srgb, var(--tone-2) 80%, transparent), transparent 60%), linear-gradient(135deg, var(--tone), color-mix(in srgb, var(--tone) 60%, var(--navy)));width:100%;box-shadow:0 20px 40px -26px var(--tone);transition:transform var(--ease), box-shadow var(--ease), filter var(--ease);border:0;align-items:center;gap:14px;padding:16px 18px;display:flex}.study-btn:hover:not(:disabled){box-shadow:0 26px 46px -26px var(--tone);transform:translateY(-2px)}.study-btn:active:not(:disabled){transform:scale(.98)}.study-btn:disabled{cursor:default;filter:grayscale(.7);opacity:.6}.study-btn>span:nth-child(2){flex:1;gap:2px;display:grid}.study-btn b{font:800 1.15rem/1.2 var(--head)}.study-btn small{color:#ffffffd9;font-size:.92rem}.study-btn-icon{background:#ffffff2e;border-radius:15px;place-items:center;width:48px;height:48px;font-size:1.5rem;display:grid}.lib-bar{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.lib-bar .search{flex:240px}.seg{background:var(--bg-soft);box-shadow:inset 0 0 0 1px var(--line);border-radius:14px;gap:4px;padding:4px;display:inline-flex}.seg button{min-height:40px;color:var(--ink-2);font:600 .95rem/1 var(--body);cursor:pointer;transition:background var(--ease), color var(--ease);background:0 0;border:0;border-radius:11px;align-items:center;gap:8px;padding:0 14px;display:inline-flex}.seg button[aria-selected=true]{color:var(--tone-ink);box-shadow:var(--shadow-1), inset 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