/* Language control: shared navigation, authentication shells and chat. */
.language-toggle{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:40px;max-width:138px;padding:8px 10px;border:1px solid var(--border);border-radius:12px;background:var(--surface);color:var(--text-secondary);font:inherit;font-size:13px;cursor:pointer;flex-shrink:0}
.language-toggle:hover{background:var(--bg);color:var(--accent)}
.language-toggle svg{flex-shrink:0}.language-code{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.language-toggle:focus-visible,.language-option:focus-visible,.language-close:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.language-dialog{position:fixed;inset-block-start:72px;inset-inline-end:max(16px,calc((100vw - 1320px)/2));inset-inline-start:auto;inset-block-end:auto;margin:0;width:360px;max-width:calc(100vw - 28px);max-height:calc(100dvh - 100px);padding:18px;border:1px solid var(--border);border-radius:20px;background:var(--surface);color:var(--text);box-shadow:0 24px 80px #0003;overflow:auto}
.language-dialog::backdrop{background:#0003;backdrop-filter:blur(3px)}
.language-dialog-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:12px}
.language-dialog h2{margin:0;font-size:18px;font-weight:700}.language-close{width:36px;height:36px;border:0;border-radius:10px;background:var(--bg);color:var(--text);font-size:25px;cursor:pointer}
.language-search{width:100%;box-sizing:border-box;min-height:44px;border:1px solid var(--border);border-radius:12px;padding:10px 12px;background:var(--bg);color:var(--text);font:inherit;font-size:16px}
.language-list{display:grid;gap:4px;margin-top:12px;max-height:48dvh;overflow:auto;overscroll-behavior:contain;padding:3px}
.language-option{display:grid;grid-template-columns:minmax(0,1fr) 22px;text-align:start;min-height:56px;gap:2px 8px;padding:9px 12px;border:0;border-radius:12px;background:transparent;color:var(--text);font:inherit;cursor:pointer}
.language-option:hover,.language-option[aria-pressed=true]{background:var(--bg);box-shadow:inset 0 0 0 1px var(--border)}
.language-option[aria-pressed=true]{color:var(--accent)}.language-native{font-size:15px;grid-column:1;unicode-bidi:isolate}
.language-option small{color:var(--text-secondary);font-size:12px;grid-column:1;grid-row:2;direction:ltr;text-align:left}
.language-check{grid-column:2;grid-row:1/3;align-self:center}.language-hint{font-size:12px;line-height:1.5;color:var(--text-secondary);margin:14px 0 0}
.language-standalone{display:flex;justify-content:flex-end;margin-block-end:12px}
.sidebar-header-buttons{flex-wrap:wrap}.chat-body .language-toggle{min-height:36px;padding:6px 8px;max-width:104px}
[dir=rtl] body{text-align:start}[dir=rtl] .nav-dropdown-menu{left:auto;right:0}
[dir=rtl] .chat-sidebar{border-right:0;border-left:1px solid var(--border)}
[dir=rtl] .response-notice,[dir=rtl] .message-text blockquote{border-left:0;border-right:2px solid var(--accent)}
[dir=rtl] .message-text ul,[dir=rtl] .message-text ol{padding-left:0;padding-right:1.5rem}
.message-text,.chat-archive-original,.canvas-message,.canvas-note-text{unicode-bidi:plaintext}
pre,code,.chat-code-block,.canvas-viewport,.canvas-stage{direction:ltr;text-align:left}
input[type=email],input[type=password],input[type=url],input[type=number],input[type=date],.language-option small{direction:ltr;unicode-bidi:isolate}
:lang(ar),:lang(fa),:lang(pnb){font-family:"Segoe UI",Tahoma,Arial,sans-serif}
:lang(hi),:lang(bn),:lang(mr),:lang(te),:lang(ta){font-family:"Nirmala UI","Noto Sans",sans-serif}
:lang(zh-Hans),:lang(wuu){font-family:"Microsoft YaHei UI","PingFang SC",sans-serif}
:lang(yue){font-family:"Microsoft JhengHei UI","PingFang HK",sans-serif}
:lang(ja){font-family:"Yu Gothic UI","Hiragino Sans",sans-serif}
:lang(ko){font-family:"Malgun Gothic","Apple SD Gothic Neo",sans-serif}
:lang(am){font-family:Nyala,"Noto Sans Ethiopic",sans-serif}
:lang(th){font-family:Leelawadee,"Noto Sans Thai",sans-serif}
@media(max-width:768px){
.language-dialog{inset-inline:12px;inset-block-start:auto;inset-block-end:max(12px,env(safe-area-inset-bottom));width:auto;max-width:none;max-height:80dvh}
.language-list{max-height:52dvh}.language-toggle{min-height:40px;max-width:88px}.language-code{font-size:12px}
[dir=rtl] .chat-sidebar{left:auto;right:0;transform:translateX(100%)}
[dir=rtl] .chat-sidebar.open,[dir=rtl] .chat-sidebar.mobile-open{transform:translateX(0)}
}
@media(prefers-reduced-motion:no-preference){.language-dialog[open]{animation:language-appear .16s ease-out}@keyframes language-appear{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}}

/* Keep navigation usable when translations expand. */
[dir=rtl] .nav-actions{margin-left:0;margin-right:auto}
@media(max-width:600px){.nav-container{gap:8px}.nav-actions{gap:5px}.nav-actions .language-toggle{width:38px;min-width:38px;max-width:38px;padding:8px}.nav-actions .language-code{display:none}.nav-actions .auth-buttons{gap:5px}.nav-actions .login-link{display:none}.nav-actions .register-btn{padding:8px;max-width:110px;overflow:hidden;text-overflow:ellipsis}.nav-actions .user-name-link{max-width:86px;overflow:hidden}.nav-actions .user-name-text{overflow:hidden;text-overflow:ellipsis}.mobile-header .language-toggle{max-width:38px;padding:8px}.mobile-header .language-code{display:none}}