:root{--bg: #0a1628;--surface: #12213b;--border: #1f3355;--text: #f2f6fb;--muted: #8fa3bf;--accent: #4da3ff;--accent-hover: #6fb6ff;--error: #f87171;--code-bg: #0d1b31;--ease: cubic-bezier(.4, 0, .2, 1)}[data-theme=light]{--bg: #ffffff;--surface: #f4f7fb;--border: #dde5ef;--text: #0a1628;--muted: #5a6b85;--accent: #0b72e7;--accent-hover: #3a8bef;--error: #dc2626;--code-bg: #eef3f9}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:15.5px;line-height:1.6;transition:background .2s var(--ease),color .2s var(--ease)}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--border);border-radius:5px;border:2px solid 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var(--ease)}.send-btn:hover{background:var(--accent-hover)}.send-btn:active{transform:scale(.97)}.send-btn:disabled{opacity:.45;cursor:default}.send-btn.stop{background:var(--surface);color:var(--text);border:1px solid var(--border)}.send-btn.stop:hover{border-color:var(--error);color:var(--error)}.char-count{text-align:right;font-size:12px;color:var(--muted);margin-top:5px}.char-count.over{color:var(--error);font-weight:600}.drop-overlay{position:absolute;top:0;right:0;bottom:0;left:0;z-index:50;background:color-mix(in srgb,var(--bg) 72%,transparent);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);border:2px dashed var(--accent);border-radius:12px;margin:10px;display:flex;align-items:center;justify-content:center;pointer-events:none;font-size:17px;font-weight:600;color:var(--accent)}.shimmer{position:relative;overflow:hidden;background:color-mix(in srgb,var(--border) 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