:root{--bg: #f8f9fb;--bg-panel: #ffffff;--bg-surface: #f3f4f6;--bg-code: #f6f8fa;--bg-header: #0f1b2d;--border: #e1e4e8;--border-subtle: #eaecef;--border-focus: #2563eb;--text: #1a1f2e;--text-muted: #6b7280;--text-heading: #0f1b2d;--text-on-dark: #e8edf5;--text-muted-on-dark: #94a3b8;--accent: #2563eb;--accent-dark: #1d4ed8;--accent-light: #eff6ff;--accent-border: #bfdbfe;--green: #16a34a;--green-bg: #f0fdf4;--green-border: #bbf7d0;--red: #dc2626;--red-bg: #fef2f2;--red-border: #fecaca;--yellow: #b45309;--yellow-bg: #fffbeb;--yellow-border: #fde68a;--diff-add-bg: rgba(22, 163, 74, .08);--diff-del-bg: rgba(220, 38, 38, .08);--diff-hunk: #2563eb;--font-sans: "Inter", -apple-system, "Segoe UI", system-ui, sans-serif;--font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--radius: 5px;--radius-lg: 8px;--radius-xl: 10px;--shadow-sm: 0 1px 2px rgba(15, 27, 45, .06), 0 1px 4px rgba(15, 27, 45, .04);--shadow-md: 0 4px 12px rgba(15, 27, 45, .1);--transition: .13s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:15px;-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{background-color:var(--bg);color:var(--text);font-family:var(--font-sans);line-height:1.6;min-height:100vh}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.app-header{background:var(--bg-header);border-bottom:1px solid rgba(255,255,255,.07);padding:0 2rem;height:64px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:100;box-shadow:0 1px #00000026,0 2px 8px #0000001f}.header-brand{display:flex;align-items:center;gap:1rem}.header-logo-wrap{width:40px;height:40px;border-radius:9px;background:#2563eb26;border:1px solid rgba(37,99,235,.35);display:flex;align-items:center;justify-content:center;flex-shrink:0;position:relative;overflow:hidden}.header-logo-mark{font-family:var(--font-mono);font-size:.72rem;font-weight:700;color:#93c5fd;letter-spacing:-.05em;line-height:1;-webkit-user-select:none;user-select:none}.header-logo-wrap:after{content:"";position:absolute;top:6px;right:6px;width:5px;height:5px;border-radius:50%;background:#f87171}.header-text{display:flex;flex-direction:column;gap:1px}.header-title{font-size:1.2rem;font-weight:700;color:#f1f5f9;letter-spacing:-.03em;line-height:1.15}.header-tagline{font-size:.67rem;color:var(--text-muted-on-dark);letter-spacing:.12em;line-height:1.2;text-transform:uppercase;font-weight:400}.backend-status{display:flex;align-items:center;gap:.4rem;font-size:.73rem;font-weight:500;padding:.28rem .7rem;border-radius:var(--radius);border:1px solid rgba(255,255,255,.12);background:#ffffff0f;color:var(--text-muted-on-dark);transition:border-color var(--transition),color var(--transition)}.status-dot{width:6px;height:6px;border-radius:50%;display:inline-block;flex-shrink:0}.backend-status--online .status-dot{background:#4ade80}.backend-status--offline .status-dot{background:#f87171}.backend-status--checking .status-dot{background:#fbbf24;animation:pulse 1.4s ease infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.35}}.backend-status--online{color:#86efac;border-color:#4ade8040}.backend-status--offline{color:#fca5a5;border-color:#f871714d}.app-main{max-width:1280px;margin:0 auto;padding:2rem 2rem 5rem;display:flex;flex-direction:column;gap:1.5rem}.input-row{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;align-items:start}@media (max-width: 860px){.app-main{padding:1.25rem 1rem 3rem}.input-row{grid-template-columns:1fr}}.panel{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-xl);padding:1.25rem 1.5rem 1.4rem;display:flex;flex-direction:column;gap:1rem;box-shadow:var(--shadow-sm)}.panel--code-input{border-left:3px solid var(--accent)}.panel--error-input{border-left:3px solid var(--red)}.panel--result{border-top:2px solid var(--accent);background:var(--bg-panel)}.panel--verify{border-top:2px solid var(--green);background:var(--bg-panel)}.panel-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem;min-height:28px}.panel-subheader{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.5rem}.panel-title{font-size:.7rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.1em;display:flex;align-items:center;gap:.4rem}.panel-title:before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--border);flex-shrink:0}.panel--code-input .panel-title:before{background:var(--accent);opacity:.8}.panel--error-input .panel-title:before{background:var(--red);opacity:.7}.panel--result .panel-title:before{background:var(--accent);opacity:.8}.panel--verify .panel-title:before{background:var(--green);opacity:.8}.panel-title--lg{font-size:.82rem;color:var(--text-heading);letter-spacing:.05em}.panel-actions{display:flex;align-items:center;gap:.35rem;flex-wrap:wrap}.panel-hint{font-size:.75rem;color:var(--text-muted);line-height:1.4}.panel-footer{margin-top:.15rem;padding-top:.9rem;border-top:1px solid var(--border-subtle);display:flex;align-items:center;flex-wrap:wrap;gap:.75rem}.btn{cursor:pointer;border:1px solid transparent;border-radius:var(--radius);font-family:var(--font-sans);font-size:.85rem;font-weight:500;padding:.45rem 1rem;transition:background var(--transition),border-color var(--transition),color var(--transition),box-shadow var(--transition),transform var(--transition);white-space:nowrap;line-height:1.25;display:inline-flex;align-items:center;gap:.35rem}.btn:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.btn:not(:disabled):active{transform:translateY(1px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn--primary{background:var(--accent);color:#fff;border-color:var(--accent-dark);font-weight:600;box-shadow:0 1px 2px #2563eb33}.btn--primary:not(:disabled):hover{background:var(--accent-dark);border-color:#1e40af;box-shadow:0 2px 6px #2563eb40}.btn--secondary{background:var(--bg-panel);color:var(--text);border-color:var(--border)}.btn--secondary:not(:disabled):hover{background:var(--bg-surface);border-color:var(--accent-border);color:var(--accent)}.btn--ghost{background:transparent;color:var(--text-muted);border-color:transparent}.btn--ghost:not(:disabled):hover{color:var(--text);background:var(--bg-surface);border-color:var(--border)}.btn--accent{background:var(--green-bg);color:var(--green);border-color:var(--green-border);font-weight:600}.btn--accent:not(:disabled):hover{background:#dcfce7;border-color:#86efac;box-shadow:0 1px 4px #16a34a26}.btn--run{background:var(--accent);color:#fff;border-color:var(--accent-dark);font-weight:600;box-shadow:0 1px 2px #2563eb33}.btn--run:not(:disabled):hover{background:var(--accent-dark);border-color:#1e40af;box-shadow:0 2px 6px #2563eb40}.btn--sm{font-size:.75rem;padding:.28rem .65rem;border-radius:4px}.btn--chip{font-size:.73rem;font-weight:500;padding:.22rem .65rem;border-radius:999px;background:var(--bg-surface);color:var(--text-muted);border-color:var(--border);letter-spacing:.01em}.btn--chip:not(:disabled):hover{color:var(--red);border-color:var(--red-border);background:var(--red-bg)}.btn--lg{font-size:.9rem;padding:.58rem 1.35rem;border-radius:var(--radius)}.code-textarea{width:100%;background:var(--bg-code);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-family:var(--font-mono);font-size:.82rem;line-height:1.6;padding:.85rem 1rem;resize:vertical;outline:none;-moz-tab-size:4;tab-size:4;transition:border-color var(--transition),box-shadow var(--transition);caret-color:var(--accent)}.code-textarea::placeholder{color:var(--text-muted);opacity:.7}.code-textarea:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px #2563eb1a}.code-textarea--error{border-color:var(--red-border);background:var(--red-bg)}.code-textarea--error:focus{border-color:var(--red);box-shadow:0 0 0 3px #dc26261a}.textarea-meta{display:flex;align-items:center;justify-content:space-between;gap:.5rem;margin-top:-.35rem}.analyze-row{display:flex;align-items:center;gap:.85rem;flex-wrap:wrap;padding-top:.1rem}.workflow-status{display:flex;align-items:center;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-xl);padding:.85rem 1.5rem;overflow-x:auto;scrollbar-width:none;gap:0;box-shadow:var(--shadow-sm)}.workflow-status::-webkit-scrollbar{display:none}.workflow-status-label{font-size:.62rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);white-space:nowrap;margin-right:1.25rem;padding-right:1.25rem;border-right:1px solid var(--border);flex-shrink:0}.workflow-step{display:flex;align-items:center;gap:.5rem;flex-shrink:0}.workflow-node{width:26px;height:26px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.67rem;font-weight:700;border:2px solid var(--border);color:var(--text-muted);background:var(--bg-surface);flex-shrink:0;transition:all var(--transition);position:relative;z-index:1}.workflow-label{font-size:.73rem;color:var(--text-muted);white-space:nowrap;transition:color var(--transition);font-weight:500}.workflow-connector{flex:1;min-width:24px;max-width:48px;height:2px;margin:0 .3rem;border-radius:1px;flex-shrink:0;transition:background var(--transition)}.workflow-connector--pending{background:repeating-linear-gradient(to right,var(--border) 0px,var(--border) 3px,transparent 3px,transparent 7px)}.workflow-connector--done{background:var(--green)}.workflow-step--active .workflow-node{border-color:var(--accent);background:var(--accent-light);color:var(--accent);box-shadow:0 0 0 3px #2563eb1a}.workflow-step--active .workflow-label{color:var(--accent);font-weight:700}.workflow-step--done .workflow-node{border-color:var(--green);background:var(--green-bg);color:var(--green)}.workflow-step--done .workflow-label{color:var(--green)}.analysis-grid{display:grid;grid-template-columns:1fr 1fr;gap:.6rem}@media (max-width: 600px){.analysis-grid{grid-template-columns:1fr}}.analysis-field{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:.65rem .9rem;display:flex;flex-direction:column;gap:.25rem;transition:border-color var(--transition)}.analysis-field:hover{border-color:var(--border)}.analysis-field--wide{grid-column:1 / -1}.field--highlight{border-color:var(--accent-border);background:var(--accent-light)}.field--highlight:hover{border-color:#93c5fd}.field-label{font-size:.65rem;text-transform:uppercase;letter-spacing:.09em;color:var(--text-muted);font-weight:600}.field-value{font-size:.87rem;color:var(--text);word-break:break-word;line-height:1.5}.field-value--mono{font-family:var(--font-mono);font-size:.82rem;color:var(--accent-dark)}.confidence-badge{font-size:.71rem;font-weight:700;padding:.22rem .65rem;border-radius:var(--radius);letter-spacing:.02em}.confidence--high{background:var(--green-bg);color:var(--green);border:1px solid var(--green-border)}.confidence--medium{background:var(--yellow-bg);color:var(--yellow);border:1px solid var(--yellow-border)}.confidence--low{background:var(--red-bg);color:var(--red);border:1px solid var(--red-border)}.fix-explanation,.fix-proposed-change{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:.85rem 1rem}.subsection-title{font-size:.65rem;text-transform:uppercase;letter-spacing:.09em;color:var(--text-muted);font-weight:700;margin-bottom:.4rem}.explanation-text{font-size:.87rem;color:var(--text);line-height:1.65}.code-tabs{display:flex;gap:0;border-bottom:1px solid var(--border);background:var(--bg-surface);border-radius:var(--radius) var(--radius) 0 0;padding:0 .25rem}.code-tab{background:transparent;border:none;border-bottom:2px solid transparent;color:var(--text-muted);cursor:pointer;font-size:.8rem;font-weight:500;padding:.5rem 1rem;font-family:var(--font-sans);transition:color var(--transition),border-color var(--transition);margin-bottom:-1px}.code-tab:hover{color:var(--text)}.code-tab--active{color:var(--accent);border-bottom-color:var(--accent);font-weight:700}.code-block{background:var(--bg-code);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;font-family:var(--font-mono);font-size:.8rem;line-height:1.6;overflow-x:auto;white-space:pre;color:var(--text);scrollbar-width:thin;scrollbar-color:var(--border) transparent}.code-block::-webkit-scrollbar{height:5px}.code-block::-webkit-scrollbar-track{background:transparent}.code-block::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.code-tabs+.code-block{border-top:none;border-radius:0 0 var(--radius) var(--radius)}.code-block--compact{font-size:.77rem;padding:.75rem .9rem}.code-block--fixed{border-color:var(--green-border)}.code-block--stderr{color:var(--red)}.diff-add{display:block;background:var(--diff-add-bg);color:var(--green)}.diff-remove{display:block;background:var(--diff-del-bg);color:var(--red)}.diff-hunk{display:block;color:var(--diff-hunk);opacity:.75}.applied-notice{display:flex;align-items:center;flex-wrap:wrap;gap:.75rem}.test-results{border-top:1px solid var(--border-subtle);padding-top:1rem;display:flex;flex-direction:column;gap:.75rem}.test-summary-row{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap}.test-status-badge{font-size:.78rem;font-weight:700;padding:.28rem .8rem;border-radius:var(--radius);letter-spacing:.04em}.test-status-badge--pass{background:var(--green-bg);color:var(--green);border:1px solid var(--green-border)}.test-status-badge--fail{background:var(--red-bg);color:var(--red);border:1px solid var(--red-border)}.test-counts{font-size:.82rem;color:var(--text-muted);font-variant-numeric:tabular-nums}.tests-passed{color:var(--green);font-weight:600}.tests-failed{color:var(--red);font-weight:600}.tests-errors{color:var(--yellow);font-weight:600}.return-code{font-size:.73rem;color:var(--text-muted);font-family:var(--font-mono);background:var(--bg-surface);border:1px solid var(--border-subtle);padding:.18rem .5rem;border-radius:4px;margin-left:auto}.test-output{display:flex;flex-direction:column;gap:.5rem}.output-label{font-size:.65rem;text-transform:uppercase;letter-spacing:.09em;color:var(--text-muted);font-weight:700;margin-bottom:.15rem}.badge{font-size:.7rem;font-weight:600;padding:.2rem .6rem;border-radius:var(--radius);letter-spacing:.02em}.badge--green{background:var(--green-bg);color:var(--green);border:1px solid var(--green-border)}.badge--yellow{background:var(--yellow-bg);color:var(--yellow);border:1px solid var(--yellow-border)}.section-divider{display:flex;align-items:center;gap:.75rem;color:var(--text-muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.1em;font-weight:600}.section-divider:before,.section-divider:after{content:"";flex:1;height:1px;background:var(--border)}.error-banner{background:var(--red-bg);border:1px solid var(--red-border);border-radius:var(--radius);color:var(--red);font-size:.85rem;padding:.7rem 1rem;display:flex;align-items:center;gap:.5rem;animation:slideDown .15s ease}@keyframes slideDown{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.error-banner strong{flex-shrink:0}.error-banner-close{margin-left:auto;background:none;border:none;color:var(--red);cursor:pointer;font-size:.85rem;padding:.15rem .4rem;border-radius:3px;flex-shrink:0;transition:background var(--transition)}.error-banner-close:hover{background:#dc26261a}.warn-banner{background:var(--yellow-bg);border:1px solid var(--yellow-border);border-radius:var(--radius);color:var(--yellow);font-size:.82rem;padding:.65rem 1rem}.warn-banner code{background:#b4530914;padding:.1rem .4rem;border-radius:3px;font-family:var(--font-mono);font-size:.8em}.info-box--warning{background:var(--yellow-bg);border:1px solid var(--yellow-border);border-radius:var(--radius);color:var(--yellow);font-size:.82rem;padding:.65rem 1rem}.app-footer{text-align:center;font-size:.72rem;color:var(--text-muted);padding:1.5rem 1rem;border-top:1px solid var(--border-subtle);letter-spacing:.02em}