*{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#111318;--bg2:#1a1d24;--bg3:#22262f;--text:#e2e4ea;--text2:#9ba1b0;--accent:#d97706;--accent2:#f59e0b;--accent-bg:rgba(217,119,6,.12);--red:#ef4444;--green:#22c55e;--blue:#3b82f6;--border:#2a2e38;--radius:8px;--shadow:0 4px 24px rgba(0,0,0,.3)}
html{scroll-behavior:smooth}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;font-size:16px}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent2)}

/* Header */
.site-header{background:var(--bg2);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{display:flex;align-items:center;gap:8px;color:var(--text)}
.logo-text{font-size:1.15rem}
.main-nav{display:flex;gap:4px}
.main-nav a{padding:8px 14px;border-radius:var(--radius);color:var(--text2);font-size:.9rem;transition:.15s}
.main-nav a:hover{color:var(--text);background:var(--bg3)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;width:32px;height:32px;position:relative}
.nav-toggle::before{content:'';display:block;width:20px;height:2px;background:var(--text);position:absolute;top:10px;left:6px;box-shadow:0 6px 0 var(--text),0 12px 0 var(--text)}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:var(--radius);font-size:.95rem;font-weight:600;cursor:pointer;border:none;transition:.15s}
.btn-primary{background:var(--accent);color:#111}
.btn-primary:hover{background:var(--accent2);color:#111}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.btn-sm{padding:6px 14px;font-size:.85rem}
.btn-danger{background:var(--red);color:#fff}
.btn-danger:hover{background:#dc2626}
.btn-fav{background:none;border:1px solid var(--border);padding:6px;border-radius:50%;cursor:pointer;font-size:1.1rem;color:var(--text2);transition:.15s}
.btn-fav:hover,.btn-fav.active{color:var(--accent);border-color:var(--accent)}
.btn-fav.active{background:var(--accent-bg)}

/* Hero */
.hero{padding:80px 0 60px;text-align:center;background:linear-gradient(180deg,var(--bg2) 0%,var(--bg) 100%)}
.hero h1{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;line-height:1.2;margin-bottom:16px}
.hero-sub{font-size:1.1rem;color:var(--text2);max-width:560px;margin:0 auto 28px}
.hero .btn{margin:4px}

/* Sections */
.section{padding:60px 0}
.section h2{font-size:1.6rem;margin-bottom:8px}
.section-intro{color:var(--text2);margin-bottom:28px;max-width:600px}
.section-header-row{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:16px}

/* Matcher */
.matcher-section{background:var(--bg2)}
.matcher-layout{display:grid;grid-template-columns:300px 1fr;gap:32px}
.matcher-controls{display:flex;flex-direction:column;gap:18px}
.control-group label{display:block;font-size:.85rem;font-weight:600;color:var(--text2);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px}
.control-group select{width:100%;padding:10px 12px;background:var(--bg3);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);font-size:.95rem;appearance:auto}
.control-group select:focus{outline:none;border-color:var(--accent)}
.preset-buttons{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.preset-label{font-size:.8rem;color:var(--text2);width:100%;margin-bottom:4px}
.favorites-toggle{display:flex;gap:8px;margin-top:8px}

/* Results */
.matcher-results{display:flex;flex-direction:column;gap:12px}
.results-hint{color:var(--text2);font-style:italic;padding:40px 0;text-align:center}
.knot-result{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:18px;transition:.15s}
.knot-result:hover{border-color:var(--accent)}
.knot-result-header{display:flex;justify-content:space-between;align-items:center}
.knot-result-header h3{font-size:1.1rem}
.knot-result-header h3 span{font-weight:400;color:var(--text2);font-size:.85rem}
.knot-badges{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 6px}
.badge{padding:3px 10px;border-radius:20px;font-size:.75rem;font-weight:600}
.badge-strength{background:rgba(34,197,94,.15);color:var(--green)}
.badge-release{background:rgba(59,130,246,.15);color:var(--blue)}
.badge-difficulty{background:rgba(217,119,6,.15);color:var(--accent)}
.badge-warning{background:rgba(239,68,68,.15);color:var(--red)}
.knot-desc{font-size:.9rem;color:var(--text2);margin-top:8px}
.knot-detail{display:none;margin-top:14px;padding-top:14px;border-top:1px solid var(--border);font-size:.9rem;color:var(--text2)}
.knot-detail.open{display:block}
.knot-detail h4{font-size:.85rem;color:var(--text);margin-bottom:6px}
.knot-detail ul{padding-left:18px;margin:6px 0}
.knot-detail li{margin-bottom:4px}
.rank-num{font-size:1.4rem;font-weight:800;color:var(--accent);margin-right:12px;min-width:30px}
.result-top{display:flex;align-items:center}

/* Scenarios */
.scenario-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.scenario-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:22px}
.scenario-card h3{font-size:1.1rem;margin-bottom:10px;color:var(--accent)}
.scenario-card p{color:var(--text2);font-size:.9rem;margin-bottom:12px}
.scenario-knots{font-size:.85rem;color:var(--text2)}

/* Reference Table */
.table-wrapper{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border)}
.knot-table{width:100%;border-collapse:collapse;font-size:.9rem}
.knot-table th{background:var(--bg3);padding:12px 16px;text-align:left;font-weight:600;color:var(--text2);white-space:nowrap}
.knot-table td{padding:12px 16px;border-top:1px solid var(--border)}
.knot-table tr{cursor:pointer;transition:.1s}
.knot-table tbody tr:hover{background:var(--bg3)}
.ref-actions{display:flex;gap:8px}
.knot-details{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-top:16px}
.knot-details h3{margin-bottom:8px}
.knot-details h4{margin:14px 0 6px;font-size:.9rem}
.knot-details p,.knot-details li{color:var(--text2);font-size:.9rem}
.knot-details ul{padding-left:18px}
.knot-details li{margin-bottom:4px}

/* Tips */
.tips-section{background:var(--bg2)}
.tips-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.tip-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.tip-card h3{font-size:1rem;margin-bottom:8px;color:var(--accent)}
.tip-card p{color:var(--text2);font-size:.9rem}

/* Print */
.print-section{text-align:center;background:var(--bg2)}

/* Why */
.why-grid{display:grid;grid-template-columns:1fr 280px;gap:40px}
.why-grid p{color:var(--text2);margin-bottom:14px;font-size:.95rem}
.version-note{font-size:.8rem;color:var(--text2);margin-top:20px}
.why-sidebar{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:22px;height:fit-content}
.why-sidebar h3{font-size:1rem;margin-bottom:12px}
.checklist{list-style:none;padding:0}
.checklist li{padding:8px 0 8px 24px;position:relative;color:var(--text2);font-size:.9rem;border-bottom:1px solid var(--border)}
.checklist li:last-child{border:none}
.checklist li::before{content:'✓';position:absolute;left:0;color:var(--green);font-weight:700}

/* Footer */
.site-footer{background:var(--bg2);border-top:1px solid var(--border);padding:40px 0 20px}
.footer-top{display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px;margin-bottom:24px}
.footer-desc{color:var(--text2);font-size:.85rem;margin-top:8px;max-width:300px}
.footer-links{display:flex;gap:20px;flex-wrap:wrap}
.footer-links a{color:var(--text2);font-size:.9rem}
.footer-links a:hover{color:var(--text)}
.footer-bottom{border-top:1px solid var(--border);padding-top:16px;font-size:.85rem;color:var(--text2)}
.footer-bottom a{color:var(--text2)}

/* Print */
@media print{
  .site-header,.site-footer,.matcher-section,.scenarios-section,.tips-section,.print-section,.why-section,.ref-actions,.favorites-toggle,.btn-fav{display:none}
  body{background:#fff;color:#000}
  .knot-table th,.knot-table td{border:1px solid #ccc;padding:8px}
  .knot-table th{background:#eee}
  .section{padding:20px 0}
  h2{font-size:1.3rem}
}

/* Responsive */
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:60px;left:0;right:0;background:var(--bg2);flex-direction:column;padding:12px;border-bottom:1px solid var(--border)}
  .main-nav.open{display:flex}
  .nav-toggle{display:block}
  .matcher-layout{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr}
  .hero{padding:50px 0 40px}
  .section{padding:40px 0}
  .section-header-row{flex-direction:column}
}
@media(max-width:480px){
  .knot-result-header{flex-direction:column;align-items:flex-start;gap:8px}
  .knot-badges{margin-top:4px}
}


/* 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;
}