*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --blue:#2563eb;--blue-dark:#1d4ed8;--blue-light:#dbeafe;
  --slate-50:#f8fafc;--slate-100:#f1f5f9;--slate-200:#e2e8f0;--slate-300:#cbd5e1;
  --slate-500:#64748b;--slate-600:#475569;--slate-700:#334155;--slate-800:#1e293b;--slate-900:#0f172a;
  --green:#16a34a;--red:#dc2626;--amber:#d97706;
  --radius:8px;--radius-lg:12px;
  --shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.06);
  --shadow-md:0 4px 6px -1px rgba(0,0,0,.08),0 2px 4px -2px rgba(0,0,0,.06);
  --max-width:1120px;
}
html{scroll-behavior:smooth}
body{font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;color:var(--slate-800);background:var(--slate-50);line-height:1.6;-webkit-font-smoothing:antialiased}
.container{max-width:var(--max-width);margin:0 auto;padding:0 1.5rem}

/* Header */
.site-header{background:#fff;border-bottom:1px solid var(--slate-200);position:sticky;top:0;z-index:100}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:56px}
.logo{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--slate-900);font-weight:700;font-size:1.05rem}
.logo svg{flex-shrink:0}
.site-nav{display:flex;gap:1.5rem}
.site-nav a{text-decoration:none;color:var(--slate-600);font-size:.9rem;font-weight:500;transition:color .15s}
.site-nav a:hover{color:var(--blue)}

/* Hero */
.hero-section{padding:3.5rem 0 2.5rem;background:linear-gradient(180deg,#fff 0%,var(--slate-50) 100%)}
.hero-section h1{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:800;color:var(--slate-900);line-height:1.2;max-width:640px}
.hero-sub{font-size:1.05rem;color:var(--slate-500);max-width:560px;margin-top:.75rem}

/* Workspace */
.workspace{padding:2rem 0 3rem}
.workspace-grid{display:grid;grid-template-columns:340px 1fr;gap:2rem;align-items:start}
@media(max-width:860px){.workspace-grid{grid-template-columns:1fr}}

.input-panel{background:#fff;border:1px solid var(--slate-200);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow);position:sticky;top:72px}
.input-panel h2{font-size:1.1rem;margin-bottom:1rem;color:var(--slate-900)}
.field{margin-bottom:1rem}
.field label{display:block;font-size:.8rem;font-weight:600;color:var(--slate-600);margin-bottom:.3rem;text-transform:uppercase;letter-spacing:.03em}
.field input,.field select{width:100%;padding:.55rem .75rem;border:1px solid var(--slate-300);border-radius:var(--radius);font-size:.9rem;color:var(--slate-800);background:#fff;transition:border-color .15s}
.field input:focus,.field select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-light)}
.field input::placeholder{color:var(--slate-300)}

.presets{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--slate-200)}
.presets-label{display:block;font-size:.75rem;font-weight:600;color:var(--slate-500);margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.03em}
.preset-btn{display:inline-block;padding:.35rem .75rem;margin:0 .35rem .35rem 0;border:1px solid var(--slate-300);border-radius:20px;background:var(--slate-50);font-size:.8rem;color:var(--slate-600);cursor:pointer;transition:all .15s}
.preset-btn:hover{border-color:var(--blue);color:var(--blue);background:var(--blue-light)}

/* Results */
.results-panel{min-width:0}
.results-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.75rem;margin-bottom:1rem}
.results-header h2{font-size:1.1rem;color:var(--slate-900)}
.results-actions{display:flex;gap:.5rem}
.btn{display:inline-flex;align-items:center;gap:.35rem;padding:.45rem .9rem;border:1px solid var(--slate-300);border-radius:var(--radius);background:#fff;font-size:.85rem;font-weight:500;color:var(--slate-700);cursor:pointer;transition:all .15s}
.btn:hover{border-color:var(--blue);color:var(--blue)}
.btn-sm{padding:.35rem .75rem;font-size:.8rem}
.btn.copied{border-color:var(--green);color:var(--green)}

.citation-cards{display:flex;flex-direction:column;gap:.75rem}
.citation-card{background:#fff;border:1px solid var(--slate-200);border-radius:var(--radius-lg);padding:1.25rem;box-shadow:var(--shadow);cursor:pointer;transition:all .15s;position:relative}
.citation-card:hover{border-color:var(--blue);box-shadow:var(--shadow-md)}
.citation-card:focus{outline:2px solid var(--blue);outline-offset:2px}
.citation-card .style-name{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--blue);margin-bottom:.5rem}
.citation-card .citation-text{font-size:.925rem;line-height:1.65;color:var(--slate-800);word-break:break-word}
.citation-card .style-note{font-size:.8rem;color:var(--slate-500);margin-top:.6rem;padding-top:.6rem;border-top:1px dashed var(--slate-200)}
.citation-card .copy-hint{font-size:.75rem;color:var(--slate-300);position:absolute;top:1.25rem;right:1.25rem;opacity:0;transition:opacity .15s}
.citation-card:hover .copy-hint{opacity:1}
.empty-state{text-align:center;padding:3rem 1rem;color:var(--slate-500)}
.empty-state svg{margin:0 auto 1rem;color:var(--slate-300)}

/* Quick ref */
.quick-ref-section{padding:3rem 0;background:#fff;border-top:1px solid var(--slate-200)}
.quick-ref-section h2{font-size:1.4rem;margin-bottom:.5rem;color:var(--slate-900)}
.section-intro{color:var(--slate-500);margin-bottom:1.5rem;font-size:.95rem}
.ref-table-wrapper{overflow-x:auto}
.ref-table{width:100%;border-collapse:collapse;font-size:.9rem}
.ref-table th{text-align:left;padding:.75rem 1rem;background:var(--slate-100);color:var(--slate-600);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.03em;border-bottom:2px solid var(--slate-200)}
.ref-table td{padding:.75rem 1rem;border-bottom:1px solid var(--slate-200);color:var(--slate-700)}
.ref-table tr:last-child td{border-bottom:none}
.ref-table tr:hover td{background:var(--slate-50)}

/* Mistakes */
.mistakes-section{padding:3rem 0}
.mistakes-section h2{font-size:1.4rem;margin-bottom:.5rem;color:var(--slate-900)}
.mistakes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.25rem;margin-top:1.5rem}
.mistake-card{background:#fff;border:1px solid var(--slate-200);border-radius:var(--radius-lg);padding:1.25rem;box-shadow:var(--shadow)}
.mistake-card h3{font-size:.95rem;color:var(--slate-800);margin-bottom:.4rem}
.mistake-card p{font-size:.875rem;color:var(--slate-600);line-height:1.55}

/* Guide */
.guide-section{padding:3rem 0;background:#fff;border-top:1px solid var(--slate-200)}
.guide-section h2{font-size:1.4rem;margin-bottom:1.5rem;color:var(--slate-900)}
.guide-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1.25rem;margin-bottom:2rem}
.guide-block{padding:1rem;background:var(--slate-50);border-radius:var(--radius);border:1px solid var(--slate-200)}
.guide-block h3{font-size:.9rem;color:var(--slate-800);margin-bottom:.35rem}
.guide-block p{font-size:.85rem;color:var(--slate-600);line-height:1.55}
.assumptions-box{background:var(--blue-light);border:1px solid #bfdbfe;border-radius:var(--radius-lg);padding:1.25rem}
.assumptions-box h3{font-size:.9rem;color:var(--blue-dark);margin-bottom:.5rem}
.assumptions-box ul{padding-left:1.25rem}
.assumptions-box li{font-size:.85rem;color:var(--slate-700);margin-bottom:.3rem;line-height:1.5}

/* Footer */
.site-footer{background:var(--slate-900);color:var(--slate-300);padding:2.5rem 0 1.5rem;font-size:.85rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;margin-bottom:2rem}
.footer-grid strong{color:#fff;display:block;margin-bottom:.35rem;font-size:.9rem}
.footer-grid a{color:var(--slate-300);text-decoration:none;display:block;margin-bottom:.2rem}
.footer-grid a:hover{color:#fff}
.footer-meta{text-align:center;color:var(--slate-500);font-size:.8rem;padding-top:1.5rem;border-top:1px solid var(--slate-700)}

/* Print */
@media print{
  .site-header,.site-footer,.input-panel,.presets,.results-actions,.site-nav{display:none!important}
  .workspace-grid{display:block}
  .citation-card{break-inside:avoid;box-shadow:none;border:1px solid #ccc;margin-bottom:.5rem}
  .citation-card .copy-hint{display:none}
  body{background:#fff}
}

/* Responsive */
@media(max-width:640px){
  .site-nav{gap:.75rem}
  .site-nav a{font-size:.8rem}
  .hero-section{padding:2rem 0 1.5rem}
  .input-panel{position:static}
  .results-header{flex-direction:column;align-items:flex-start}
  .mistakes-grid,.guide-grid{grid-template-columns:1fr}
}

/* Focus visible */
:focus-visible{outline:2px solid var(--blue);outline-offset:2px;border-radius:2px}

/* Toast */
.toast{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%);background:var(--slate-800);color:#fff;padding:.6rem 1.2rem;border-radius:var(--radius);font-size:.85rem;box-shadow:var(--shadow-md);z-index:200;opacity:0;transition:opacity .2s;pointer-events:none}
.toast.show{opacity:1}


/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}