:root{--bg-main:#0f172a;--bg-card:#1e293b;--border-color:#334155;--text-main:#f8fafc;--text-muted:#94a3b8;--primary:#3b82f6;--hover-bg:#334155;--font-mono:'JetBrains Mono', 'Fira Code', 'Courier New', monospace}.dark-theme{font-family:'Inter',system-ui,sans-serif;color:var(--text-main);background:var(--bg-main);padding:1.5rem;border-radius:1rem;min-height:500px}.text-center{text-align:center}.text-3xl{font-size:1.875rem}.font-bold{font-weight:700}.text-muted{color:var(--text-muted)}.text-sm{font-size:.875rem}.mt-3{margin-top:.75rem}.mt-6{margin-top:1.5rem}.mt-8{margin-top:2rem}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:1rem;padding:1.5rem;box-shadow:0 4px 6px -1px rgb(0 0 0 / .1)}.card-title{margin:0 0 1rem 0;font-size:1rem;color:var(--text-muted);display:flex;align-items:center;justify-content:space-between;gap:.5rem}.card-title span{display:flex;align-items:center;gap:.5rem}.card-title i{width:18px;height:18px}.label-bold{display:flex;align-items:center;gap:.5rem;font-weight:600;margin-bottom:.75rem;color:var(--primary)}.input-wrapper{position:relative}.form-control{width:100%;background:var(--bg-main);border:2px solid var(--border-color);color:#fff;padding:1rem 3rem 1rem 1rem;border-radius:.75rem;font-size:1.25rem;font-family:var(--font-mono);outline:none;transition:all 0.2s}.form-control:focus{border-color:var(--primary)}.btn-clear-input{position:absolute;right:.75rem;top:50%;transform:translateY(-50%);background:#fff0;border:none;color:var(--text-muted);cursor:pointer;padding:.5rem;border-radius:50%}.btn-clear-input:hover{background:var(--hover-bg);color:#fff}.pill-group{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.5rem}.btn-pill{background:var(--bg-main);border:1px solid var(--border-color);color:var(--text-muted);padding:.35rem .75rem;border-radius:1rem;font-size:.8rem;cursor:pointer;transition:all 0.2s}.btn-pill:hover{border-color:var(--primary);color:var(--primary)}.results-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}@media (min-width:768px){.results-grid{grid-template-columns:1.5fr 1fr}}.latex-render-zone{min-height:100px;display:flex;align-items:center;justify-content:center;background:var(--bg-main);border-radius:.5rem;padding:1rem;font-size:1.5rem;overflow-x:auto}.error-msg{color:#ef4444;font-size:.9rem;margin-top:.75rem;text-align:center}.code-zone pre{background:var(--bg-main);padding:1rem;border-radius:.5rem;margin:0;overflow-x:auto;font-family:var(--font-mono);font-size:.9rem;color:#93c5fd;min-height:100px;white-space:pre-wrap;word-break:break-all}.btn-icon{background:#fff0;border:none;color:var(--text-muted);cursor:pointer;padding:.25rem;transition:color 0.2s}.btn-icon:hover{color:#fff}.plot-area{width:100%;height:400px;background:var(--bg-main);border-radius:.5rem}.toast{position:fixed;bottom:2rem;left:50%;transform:translateX(-50%) translateY(100px);background:var(--primary);color:#fff;padding:.75rem 1.5rem;border-radius:2rem;font-weight:600;opacity:0;transition:all 0.3s cubic-bezier(.68,-.55,.265,1.55);z-index:1000}.toast.show{transform:translateX(-50%) translateY(0);opacity:1}.js-plotly-plot .plotly .main-svg{border-radius:.5rem}