.app{position:relative;box-sizing:border-box;width:100%;max-width:var(--app-max-width);min-height:100vh;min-height:100dvh;margin-inline:auto;display:flex;flex-direction:column;padding-block:calc(var(--app-pad-block) + var(--safe-top)) var(--app-pad-block);padding-inline:calc(var(--app-pad-inline) + var(--safe-left)) calc(var(--app-pad-inline) + var(--safe-right));gap:var(--app-gap);min-inline-size:0}.bg-gradient{position:fixed;inset:0;background:radial-gradient(ellipse 80% 60% at 50% -20%,var(--gradient-1),transparent),radial-gradient(ellipse 60% 40% at 80% 100%,var(--gradient-2),transparent);pointer-events:none;z-index:0;transition:opacity .3s ease}.bg-grid{position:fixed;inset:0;background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);background-size:48px 48px;pointer-events:none;z-index:0;mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black,transparent)}.app>*:not(.bg-gradient):not(.bg-grid){position:relative}.app>.header{z-index:1000}.app>.header:has(.dropdown-menu),.app>.header:has(.settings-popover),.app>.header:has(.history-popover){z-index:10000}.app>.mode-toggle{z-index:10}.app>.workspace{z-index:1}.header{display:flex;align-items:center;justify-content:space-between;gap:clamp(.75rem,2vw,1rem);flex-wrap:wrap;min-inline-size:0;width:100%}.header-brand{display:flex;align-items:center;gap:.875rem;min-inline-size:0;flex:1 1 auto}.logo-svg{flex-shrink:0;width:clamp(2.25rem,6vw,2.75rem);height:auto;aspect-ratio:1;filter:drop-shadow(var(--logo-shadow));transition:transform var(--transition),filter var(--transition)}.header-brand:hover .logo-svg{transform:scale(1.04) rotate(-2deg)}.header h1{font-size:clamp(1rem,.85rem + 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var(--border);color:var(--text-secondary);border-radius:var(--radius-sm)}@media(hover:hover)and (pointer:fine){.btn-theme:hover{background:var(--bg-hover);color:var(--accent);border-color:var(--border-hover)}}.btn-primary{background:linear-gradient(135deg,var(--accent),#6366f1);color:#fff;padding:.625rem 1.25rem;border-radius:var(--radius-sm);font-weight:600;box-shadow:0 4px 16px #3b9eff40}@media(hover:hover)and (pointer:fine){.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px #3b9eff59}}.dropdown{position:relative;display:inline-block;max-inline-size:100%}.dropdown:focus-within,.dropdown:hover{z-index:1050}.dropdown-menu{position:absolute;top:calc(100% + 8px);inset-inline-end:0;inset-inline-start:auto;min-width:min(200px,calc(100vw - 2 * var(--app-pad-inline) - var(--safe-left) - var(--safe-right)));max-width:min(280px,calc(100vw - 2 * var(--app-pad-inline) - var(--safe-left) - var(--safe-right)));max-height:min(70dvh,calc(100dvh - 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minmax(0,1fr);gap:clamp(.75rem,1.5vw,1rem)}.workspace.mode-split .panel{min-height:calc(100dvh - var(--chrome-offset));max-height:calc(100dvh - var(--chrome-offset))}.panel{flex:1;display:flex;flex-direction:column;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-md),var(--shadow-glow);min-height:calc(100dvh - var(--chrome-offset));min-inline-size:0;width:100%;max-width:100%;container-type:inline-size;container-name:panel;transition:background var(--transition),border-color var(--transition),box-shadow var(--transition)}.panel-header{display:flex;align-items:center;justify-content:space-between;gap:.75rem;padding:.875rem var(--panel-pad-inline);border-bottom:1px solid var(--border);background:var(--bg-panel-header);flex-shrink:0;min-inline-size:0}.panel-title{font-size:.875rem;font-weight:600;color:var(--text-primary);min-inline-size:0;overflow-wrap:anywhere}.panel-hint{font-size:.75rem;color:var(--text-muted);flex-shrink:1;text-align:end;overflow-wrap:anywhere}.textarea{flex:1;width:100%;max-width:100%;min-inline-size:0;padding:var(--panel-pad-block) var(--panel-pad-inline);background:var(--bg-input);color:var(--text-primary);border:none;resize:none;font-family:"Vazirmatn",var(--font-fa);font-size:var(--preview-font-size, 1.05rem);line-height:var(--preview-line-height, 2);direction:rtl;text-align:start;unicode-bidi:plaintext;overflow-wrap:anywhere;transition:background var(--transition),color var(--transition)}.textarea::placeholder{color:var(--text-muted);direction:rtl;text-align:start}.textarea:focus{outline:none}.preview-content{flex:1;overflow-x:hidden;overflow-x:clip;overflow-y:visible;padding:var(--panel-pad-block) var(--panel-pad-inline);direction:rtl;text-align:start;unicode-bidi:plaintext;min-inline-size:0;min-height:0;max-width:100%}.workspace.mode-split .preview-content{overflow-y:auto;overscroll-behavior-y:auto}.preview-content.empty{display:flex;align-items:center;justify-content:center}.empty-state{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center;color:var(--text-secondary);padding:40px}.empty-icon{color:var(--text-muted);opacity:.5;margin-bottom:8px}.empty-state p{font-size:1.1rem;font-weight:600;color:var(--text-secondary)}.empty-state span{font-size:.85rem;color:var(--text-muted);max-width:280px;line-height:1.7}.empty-state .btn-primary{margin-top:12px}.markdown-body{font-family:var(--preview-font-family, var(--font-fa));font-size:var(--preview-font-size, 1.05rem);line-height:var(--preview-line-height, 2);color:var(--text-primary);direction:rtl;text-align:start;unicode-bidi:isolate;word-break:break-word;overflow-wrap:break-word;min-inline-size:0;max-width:100%;margin-inline:auto;width:100%}.markdown-body [dir=ltr]:not(li),.markdown-body :not(li).bidi-ltr{direction:ltr;text-align:left}.markdown-body [dir=rtl]:not(li):not(td):not(th){direction:rtl;text-align:right}.markdown-body ul,.markdown-body ol{margin:.8em 0;padding-block:0;padding-inline-start:1.5em;padding-inline-end:0;list-style:none}.markdown-body ol{counter-reset:fa-item}.markdown-body li{position:relative;direction:rtl;text-align:right;margin:.4em 0}.markdown-body ul>li:before{content:"•";position:absolute;right:-1.15em;left:auto;top:0;color:var(--text-secondary)}.markdown-body ol>li{counter-increment:fa-item}.markdown-body ol>li:before{content:counter(fa-item) ".";position:absolute;right:-1.45em;left:auto;top:0;color:var(--text-secondary);font-feature-settings:"tnum"}.markdown-body li .bidi-item-text{unicode-bidi:isolate;display:block}.markdown-body li .bidi-item-text[dir=ltr]{direction:ltr;text-align:left}.markdown-body li .bidi-item-text[dir=rtl]{direction:rtl;text-align:right}.markdown-body blockquote.bidi-ltr{border-inline-start:3px solid var(--accent);border-inline-end:none;border-start-start-radius:0;border-start-end-radius:var(--radius-sm);border-end-end-radius:var(--radius-sm);border-end-start-radius:0}.markdown-body .is-english{font-family:var(--preview-font-en)}.markdown-body .is-arabic{font-family:var(--preview-font-ar)}.preview-content.is-stale{opacity:.92;transition:opacity .15s ease}.mermaid-loading{min-height:72px;align-items:center}.mermaid-loading-text{color:var(--text-muted);font-size:.85rem}.settings-popover{position:absolute;top:calc(100% + 8px);inset-inline-end:0;inset-inline-start:auto;width:min(280px,calc(100vw - 2 * var(--app-pad-inline) - var(--safe-left) - var(--safe-right)));max-height:min(80dvh,calc(100dvh - 5rem));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:16px;box-shadow:0 16px 48px #0006,0 0 0 1px var(--border);z-index:10000;display:flex;flex-direction:column;gap:16px;animation:dropdown-in .18s cubic-bezier(.16,1,.3,1);backdrop-filter:blur(16px)}.history-popover{position:absolute;top:calc(100% + 8px);inset-inline-end:0;inset-inline-start:auto;width:min(320px,calc(100vw - 2 * var(--app-pad-inline) - var(--safe-left) - var(--safe-right)));max-height:min(80dvh,calc(100dvh - 5rem));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:16px;box-shadow:0 16px 48px #0006,0 0 0 1px var(--border);z-index:10000;display:flex;flex-direction:column;gap:12px;animation:dropdown-in .18s cubic-bezier(.16,1,.3,1);backdrop-filter:blur(16px)}.settings-input{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-elevated);color:var(--text-primary);font:inherit;font-size:.9rem}.settings-input:focus{outline:2px solid var(--accent);outline-offset:1px}.history-hint,.history-empty{margin:0;font-size:.75rem;color:var(--text-muted);line-height:1.5}.history-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;max-height:min(40dvh,280px);overflow-y:auto}.history-item{width:100%;display:flex;flex-direction:column;gap:4px;align-items:stretch;text-align:start;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-elevated);color:var(--text-primary);cursor:pointer;transition:border-color var(--transition),background var(--transition)}.history-item:hover{border-color:var(--accent);background:var(--accent-glow)}.history-item-time{font-size:.75rem;color:var(--text-muted)}.history-item-snippet{font-size:.85rem;color:var(--text-secondary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.history-clear{width:100%;justify-content:center}.settings-row{display:flex;flex-direction:column;gap:8px}.settings-label{display:flex;justify-content:space-between;align-items:center;font-size:.825rem;font-weight:600;color:var(--text-primary)}.settings-value{font-size:.75rem;color:var(--text-muted)}.font-options{display:grid;grid-template-columns:repeat(2,1fr);gap:6px}.font-option-btn{padding:6px 10px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:.85rem;color:var(--text-secondary);background:var(--bg-elevated);transition:all var(--transition);text-align:center}.font-option-btn:hover{border-color:var(--border-hover);color:var(--text-primary)}.font-option-btn.active{background:var(--accent-glow);border-color:var(--accent);color:var(--accent);font-weight:600}.settings-range{width:100%;accent-color:var(--accent);cursor:pointer}.markdown-body>*:first-child{margin-top:0}.markdown-body>*:last-child{margin-bottom:0}.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4{font-weight:700;line-height:1.5;margin:1.6em 0 .6em;color:var(--text-primary);overflow-wrap:anywhere}.markdown-body h1{font-size:clamp(1.35rem,1.15rem + .6vw,1.75rem)}.markdown-body h2{font-size:clamp(1.2rem,1.05rem + .4vw,1.4rem);border-bottom:1px solid var(--border);padding-bottom:.4em}.markdown-body h3{font-size:clamp(1.1rem,1rem + .25vw,1.2rem)}.markdown-body h4{font-size:1.05rem}.markdown-body p{margin:.8em 0}.markdown-body li>ul,.markdown-body li>ol{margin:.2em 0}.markdown-body blockquote{margin:1em 0;padding:12px 20px;border-inline-start:3px solid var(--accent);border-inline-end:none;background:var(--accent-glow);border-start-start-radius:0;border-start-end-radius:var(--radius-sm);border-end-end-radius:var(--radius-sm);border-end-start-radius:0;color:var(--text-secondary)}.markdown-body :not(pre)>code{font-family:var(--font-mono);font-size:.9em;background:var(--bg-code-inline);padding:2px 7px;border-radius:5px;direction:ltr;unicode-bidi:isolate;display:inline;white-space:break-spaces;overflow-wrap:anywhere;word-break:break-word}.markdown-body pre{margin:1.2em 0;padding:0;background:transparent;border:none;border-radius:var(--radius-md);overflow-x:auto;direction:ltr;text-align:left;width:100%;max-width:100%;min-inline-size:0}.mermaid-block-wrapper{margin:1.2em 0;display:flex;justify-content:center;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:clamp(.75rem,2vw,1.25rem);overflow-x:auto;max-width:100%;min-inline-size:0}.mermaid-svg-container{width:100%;max-width:100%;min-inline-size:0;display:flex;justify-content:center}.mermaid-svg-container svg{max-width:100%;max-inline-size:100%;height:auto}.mermaid-error-wrapper{margin:1.2em 0;border:1px solid rgba(239,68,68,.3);border-radius:var(--radius-md);background:#ef44440d;overflow:hidden}.mermaid-error-header{background:#ef444426;color:#ef4444;padding:8px 16px;font-size:.8rem;font-weight:600}.mermaid-error-text{padding:14px 16px;font-family:var(--font-mono);font-size:.85rem;color:var(--text-secondary);white-space:pre-wrap;word-break:break-all}.code-block-wrapper{margin:1.2em 0;width:100%;max-width:100%;min-inline-size:0;border-radius:var(--radius-md);border:1px solid 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var(--transition);flex-shrink:0;font-family:var(--font-fa)}.code-copy-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.code-copy-btn.copied{color:#10b981}.code-block-body{width:100%;max-width:100%;overflow-x:auto;box-sizing:border-box;background:var(--bg-input)}.code-block-body>div{width:100%!important;max-width:100%!important;min-width:100%!important;margin:0!important;padding:14px 16px!important;box-sizing:border-box!important;display:block!important;direction:ltr!important;text-align:left!important;unicode-bidi:isolate!important;background:transparent!important;border:none!important;border-radius:0!important;overflow-x:auto!important;font-family:var(--font-mono)!important;font-size:.875rem!important;line-height:1.7!important}.code-block-body code{display:block!important;width:100%!important;max-width:100%!important;margin:0!important;padding:0!important;background:transparent!important;border:none!important;border-radius:0!important;font-family:inherit!important;font-size:inherit!important;line-height:inherit!important;white-space:pre!important;word-break:normal!important;overflow-wrap:normal!important;direction:ltr!important;text-align:left!important;unicode-bidi:isolate!important;tab-size:4}.code-block-body .token{unicode-bidi:isolate}.katex{direction:ltr;unicode-bidi:isolate;font-size:1.05em}.katex-display{direction:ltr;unicode-bidi:isolate;overflow-x:auto;overflow-y:hidden;padding:8px 0;margin:1em 0;max-width:100%}.markdown-body pre code{background:none;padding:0;font-size:.875rem;line-height:1.7;display:block;width:100%}.markdown-body a{color:var(--accent);text-decoration:none;border-bottom:1px solid var(--accent-link-border);transition:color 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strong{font-weight:700;color:var(--text-primary)}.markdown-body em{font-style:italic;color:var(--text-secondary)}.markdown-body img{max-width:100%;max-inline-size:100%;height:auto;border-radius:var(--radius-sm);margin:1em 0}.toast{position:fixed;bottom:calc(1.5rem + var(--safe-bottom));left:50%;transform:translate(-50%);max-width:min(90vw,28rem);width:max-content;background:var(--bg-elevated);border:1px solid var(--border);color:var(--text-primary);padding:10px 20px;border-radius:var(--radius-md);font-size:.875rem;box-shadow:var(--shadow-md);z-index:100;text-align:center;overflow-wrap:anywhere;animation:toast-in .25s ease}.save-warning{position:fixed;top:calc(.75rem + var(--safe-top));left:50%;transform:translate(-50%);max-width:min(92vw,36rem);width:max-content;background:color-mix(in srgb,#b45309 18%,var(--bg-elevated));border:1px solid color-mix(in srgb,#b45309 45%,var(--border));color:var(--text-primary);padding:8px 16px;border-radius:var(--radius-md);font-size:.8125rem;box-shadow:var(--shadow-md);z-index:100;text-align:center;overflow-wrap:anywhere}.preview-error-boundary{display:flex;flex-direction:column;align-items:center;gap:.75rem;padding:1.5rem 1rem;text-align:center;color:var(--text-secondary)}@keyframes toast-in{0%{opacity:0;transform:translate(-50%) translateY(12px)}to{opacity:1;transform:translate(-50%) translateY(0)}}@media(max-height:520px){.panel,.workspace.mode-split .panel{min-height:min(280px,calc(100dvh - 7rem));max-height:none}.workspace.mode-split{grid-template-columns:1fr}.workspace.mode-split .panel{min-height:min(240px,50dvh);max-height:55dvh}}@media(max-width:900px){.workspace.mode-split{grid-template-columns:1fr}.workspace.mode-split .panel{min-height:min(360px,55dvh);max-height:min(520px,70dvh)}.mode-toggle{width:100%}.mode-btn{flex:1 1 0;min-width:0;font-size:.8125rem}}@media(max-width:600px){.header{flex-direction:column;align-items:stretch}.header-brand{flex:0 1 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