*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0f1117;--bg2:#181b25;--bg3:#1f2333;--bg4:#282d42;
  --border:#2e3450;--border2:#3d4568;
  --text:#e2e4ed;--text2:#9ba1b8;--text3:#6b7294;
  --accent:#7c6ff7;--accent2:#5eead4;--accent3:#fb923c;--accent4:#f472b6;
  --id-color:#7c6ff7;--cls-color:#5eead4;--el-color:#fb923c;
  --radius:10px;--radius-sm:6px;--font:ui-sans-serif,system-ui,-apple-system,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}
code,kbd,pre{font-family:var(--mono)}
a{color:var(--accent2);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%;height:auto}

/* Header */
.site-header{background:var(--bg2);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.header-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:56px}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:1.15rem}
.logo:hover{text-decoration:none}
.logo-icon{flex-shrink:0}
.site-nav{display:flex;gap:4px}
.nav-link{padding:6px 14px;border-radius:var(--radius-sm);color:var(--text2);font-size:.875rem;font-weight:500;transition:background .15s,color .15s}
.nav-link:hover,.nav-link.active{color:var(--text);background:var(--bg3);text-decoration:none}

/* Layout */
main{max-width:1200px;margin:0 auto;padding:0 24px}

/* Calculator section */
.section-calc{padding:40px 0 20px}
.calc-layout{display:grid;grid-template-columns:1fr 280px;gap:32px;align-items:start}
@media(max-width:900px){.calc-layout{grid-template-columns:1fr}}

.calc-header{margin-bottom:28px}
.page-title{font-size:1.85rem;font-weight:800;letter-spacing:-.02em}
.page-subtitle{color:var(--text2);margin-top:6px;font-size:.95rem}

/* Selector columns */
.selector-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:24px}
@media(max-width:768px){.selector-columns{grid-template-columns:1fr}}
.selector-col{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;gap:12px;transition:border-color .2s}
.selector-col:focus-within{border-color:var(--accent)}
.col-header{display:flex;align-items:center;justify-content:space-between}
.col-title{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text3);font-weight:600}
.btn-icon{background:none;border:none;color:var(--text3);cursor:pointer;padding:4px;border-radius:4px;transition:color .15s,background .15s;display:flex;align-items:center;justify-content:center}
.btn-icon:hover{color:var(--accent3);background:var(--bg3)}
.btn-icon.saved{color:var(--accent3)}

.selector-input{width:100%;background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;color:var(--text);font-family:var(--mono);font-size:.9rem;outline:none;transition:border-color .15s}
.selector-input:focus{border-color:var(--accent)}
.selector-input::placeholder{color:var(--text3);font-family:var(--font);font-size:.85rem}

.score-display{display:flex;align-items:baseline;gap:8px}
.score-tuple{font-family:var(--mono);font-size:1.4rem;font-weight:700;color:var(--text)}
.score-label{font-size:.75rem;color:var(--text3);text-transform:uppercase;letter-spacing:.05em}

.breakdown{display:flex;flex-wrap:wrap;gap:6px}
.bd-tag{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:20px;font-family:var(--mono);font-size:.75rem;font-weight:600;cursor:default;transition:transform .1s}
.bd-tag:hover{transform:scale(1.05)}
.bd-tag.id{background:rgba(124,111,247,.15);color:var(--id-color);border:1px solid rgba(124,111,247,.3)}
.bd-tag.cls{background:rgba(94,234,212,.15);color:var(--cls-color);border:1px solid rgba(94,234,212,.3)}
.bd-tag.el{background:rgba(251,146,60,.15);color:var(--el-color);border:1px solid rgba(251,146,60,.3)}
.bd-tag .bd-count{opacity:.7;font-size:.7rem}

/* Bar chart */
.bar-wrap{display:flex;height:8px;border-radius:4px;overflow:hidden;background:var(--bg4);gap:1px}
.bar-id{height:100%;background:var(--id-color);transition:width .3s;border-radius:4px 0 0 4px}
.bar-class{height:100%;background:var(--cls-color);transition:width .3s}
.bar-el{height:100%;background:var(--el-color);transition:width .3s;border-radius:0 4px 4px 0}

/* Winner banner */
.winner-banner{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:16px 20px;margin-bottom:20px;display:flex;align-items:center;gap:12px;font-size:.95rem;transition:border-color .2s}
.winner-banner.winner-found{border-color:var(--accent2);background:rgba(94,234,212,.06)}
.winner-banner.tie{border-color:var(--accent3);background:rgba(251,146,60,.06)}
.winner-icon{font-size:1.3rem}
.winner-text{color:var(--text2)}
.winner-text strong{color:var(--text)}

/* Presets */
.presets-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:20px}
.presets-label{font-size:.8rem;color:var(--text3);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.btn-preset{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 12px;color:var(--text2);font-size:.8rem;cursor:pointer;transition:background .15s,border-color .15s,color .15s}
.btn-preset:hover{background:var(--bg4);border-color:var(--border2);color:var(--text)}

/* Actions */
.actions-row{display:flex;gap:10px;margin-bottom:24px}
.btn-action{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--bg3);color:var(--text2);font-size:.85rem;cursor:pointer;transition:background .15s,color .15s}
.btn-action:hover{background:var(--bg4);color:var(--text)}
.btn-clear{margin-left:auto;border-color:transparent;background:transparent}
.btn-clear:hover{background:rgba(244,114,182,.1);color:var(--accent4)}

/* Sidebar */
.calc-sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:72px}
.sidebar-block{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.sidebar-title{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--text3);font-weight:600;margin-bottom:12px}
.saved-list{display:flex;flex-direction:column;gap:6px}
.saved-empty{font-size:.8rem;color:var(--text3);font-style:italic}
.saved-item{display:flex;align-items:center;gap:8px;padding:6px 10px;background:var(--bg3);border-radius:var(--radius-sm);font-family:var(--mono);font-size:.8rem}
.saved-item code{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--text)}
.saved-item .btn-icon{padding:2px}
.ref-table{width:100%;border-collapse:collapse;font-size:.8rem}
.ref-table th{text-align:left;color:var(--text3);font-weight:600;padding:4px 8px;border-bottom:1px solid var(--border)}
.ref-table td{padding:4px 8px;color:var(--text2)}
.ref-table code{color:var(--accent2);font-size:.78rem}

/* Reference section */
.section-ref{padding:40px 0;border-top:1px solid var(--border);margin-top:20px}
.section-title{font-size:1.35rem;font-weight:700;margin-bottom:24px}
.ref-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:32px}
@media(max-width:768px){.ref-grid{grid-template-columns:1fr}}
.ref-card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.ref-card-header{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.ref-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}
.ref-card h3{font-size:.95rem;font-weight:600}
.ref-card p{font-size:.875rem;color:var(--text2);line-height:1.65}

/* Comparison demo */
.comparison-demo{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.comparison-demo h3{font-size:1rem;font-weight:600;margin-bottom:12px}
.comparison-demo p{font-size:.875rem;color:var(--text2);margin-bottom:10px}
.code-block{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 18px;font-size:.82rem;color:var(--accent2);overflow-x:auto;margin-bottom:14px}
.demo-pair{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:14px}
.demo-rule{display:flex;flex-direction:column;gap:4px;padding:12px 16px;border-radius:var(--radius-sm);flex:1;min-width:200px}
.demo-rule code{font-size:.82rem}
.demo-score{font-family:var(--mono);font-size:.85rem;font-weight:700}
.demo-loses{background:rgba(244,114,182,.08);border:1px solid rgba(244,114,182,.25)}
.demo-loses .demo-score{color:var(--accent4)}
.demo-wins{background:rgba(94,234,212,.08);border:1px solid rgba(94,234,212,.25)}
.demo-wins .demo-score{color:var(--accent2)}
.demo-vs{color:var(--text3);font-size:.8rem;font-weight:600}

/* Pitfalls section */
.section-pitfalls{padding:40px 0;border-top:1px solid var(--border)}
.pitfall-list{display:flex;flex-direction:column;gap:8px;margin-bottom:36px}
.pitfall-item{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.pitfall-item summary{padding:14px 20px;cursor:pointer;font-size:.9rem;color:var(--text);list-style:none;display:flex;align-items:center;gap:8px}
.pitfall-item summary::-webkit-details-marker{display:none}
.pitfall-item summary::before{content:"▸";font-size:.7rem;color:var(--text3);transition:transform .2s;flex-shrink:0}
.pitfall-item[open] summary::before{transform:rotate(90deg)}
.pitfall-item summary:hover{background:var(--bg3)}
.pitfall-item p{padding:0 20px 16px;font-size:.875rem;color:var(--text2);line-height:1.65}

.resolution-strategies h3{font-size:1rem;font-weight:600;margin-bottom:14px}
.strategy-list{padding-left:20px;display:flex;flex-direction:column;gap:10px}
.strategy-list li{font-size:.875rem;color:var(--text2);line-height:1.6}
.strategy-list strong{color:var(--text)}

/* About section */
.section-about{padding:40px 0;border-top:1px solid var(--border)}
.section-about p{font-size:.9rem;color:var(--text2);margin-bottom:12px;max-width:700px}
.version-note{font-size:.78rem;color:var(--text3);margin-top:16px}

/* Footer */
.site-footer{border-top:1px solid var(--border);margin-top:40px;background:var(--bg2)}
.footer-inner{max-width:1200px;margin:0 auto;padding:24px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-links{display:flex;gap:16px}
.footer-links a{font-size:.85rem;color:var(--text2)}
.footer-links a:hover{color:var(--text)}
.footer-brand{font-size:.8rem;color:var(--text3)}
.footer-brand a{color:var(--accent2)}

/* Tooltip */
.tooltip{position:fixed;z-index:200;background:var(--bg4);border:1px solid var(--border2);border-radius:var(--radius-sm);padding:8px 12px;font-size:.78rem;color:var(--text);max-width:260px;box-shadow:0 8px 24px rgba(0,0,0,.3);pointer-events:none;opacity:0;transition:opacity .15s}
.tooltip.visible{opacity:1}

/* Toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--bg4);border:1px solid var(--border2);border-radius:var(--radius);padding:10px 20px;font-size:.85rem;color:var(--text);box-shadow:0 8px 24px rgba(0,0,0,.3);opacity:0;transition:opacity .2s;pointer-events:none;z-index:300}
.toast.visible{opacity:1}

/* Print */
@media print{.site-header,.site-footer,.presets-row,.actions-row,.calc-sidebar,.btn-save{display:none}body{background:#fff;color:#000}.selector-col,.winner-banner,.ref-card,.comparison-demo,.pitfall-item{border-color:#ccc;background:#f5f5f5}}



/* 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;
}