:root{--bg:#0f172a;--bg-panel:#1e293bb3;--border:#ffffff1a;--text:#f8fafc;--text-muted:#94a3b8;--accent:#10b981;--accent-hover:#059669;--scrollbar:#ffffff26;--scrollbar-thumb:#ffffff4d}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg);color:var(--text);background-image:radial-gradient(circle at 100% 0,#10b98126,#0000 600px),radial-gradient(circle at 0 100%,#3b82f626,#0000 600px);flex-direction:column;min-height:100vh;font-family:Inter,system-ui,-apple-system,sans-serif;display:flex}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#ffffff80}.app-container{flex-direction:column;width:100%;max-width:1400px;height:100vh;margin:0 auto;display:flex}.header{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);align-items:center;gap:1rem;padding:1.5rem 2rem;display:flex}.header h1{letter-spacing:-.05em;color:#0000;filter:drop-shadow(0 2px 4px #00000080);background:linear-gradient(135deg,#10b981,#3b82f6);-webkit-background-clip:text;background-clip:text;font-size:1.75rem;font-weight:800}.header img{background:#fff;border-radius:12px;width:48px;height:48px;box-shadow:0 8px 16px #10b9814d}.main-content{flex:1;gap:1.5rem;padding:1.5rem 2rem;display:flex;overflow:hidden}@media (width<=768px){.main-content{flex-direction:column;gap:1rem;padding:1rem;overflow-y:auto}}.panel{background:var(--bg-panel);border:1px solid var(--border);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-radius:16px;flex-direction:column;flex:1;display:flex;overflow:hidden;box-shadow:0 8px 32px #0003}.panel-header{border-bottom:1px solid var(--border);background:#ffffff08;justify-content:space-between;align-items:center;min-height:72px;padding:1rem 1.5rem;display:flex}.panel-title{text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted);font-size:.9rem;font-weight:600}.char-counter{font-variant-numeric:tabular-nums;background:#ffffff1a;border-radius:9999px;padding:.25rem .5rem;font-size:.85rem;transition:all .3s}.char-counter.warning{color:#f59e0b;background:#f59e0b33}.char-counter.danger{color:#ef4444;background:#ef444433}.textarea-input,.preview-output{width:100%;color:var(--text);resize:none;background:0 0;border:none;flex:1;padding:1.5rem;font-family:inherit;font-size:1rem;line-height:1.6;overflow-y:auto}.textarea-input{outline:none}.textarea-input::placeholder{color:var(--text-muted);opacity:.5}.preview-output{white-space:pre-wrap;word-wrap:break-word}.btn{color:#fff;background:var(--accent);cursor:pointer;border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.5rem 1rem;font-size:.875rem;font-weight:500;transition:all .2s;display:inline-flex;box-shadow:0 4px 10px #10b98133}.btn:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 6px 15px #10b9814d}.btn:active{transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}.svg-icon{fill:currentColor;width:1em;height:1em}