*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --blue--50:#eff6ff;--blue--100:#dbeafe;--blue--200:#bfdbfe;--blue--300:#93c5fd;
  --blue--400:#60a5fa;--blue--500:#3b82f6;--blue--600:#2563eb;--blue--700:#1d4ed8;
  --gray--50:#f8fafc;--gray--100:#f1f5f9;--gray--200:#e2e8f0;--gray--300:#cbd5e1;
  --gray--400:#94a3b8;--gray--500:#64748b;--gray--600:#475569;--gray--700:#334155;
  --gray--800:#1e293b;--gray--900:#0f172a;
  --amber-100:#fef3c7;--amber-400:#fbbf24;--amber-600:#d97706;
  --green-100:#dcfce7;--green-600:#16a34a;--green-700:#15803d;
  --violet-100:#ede9fe;--violet-600:#7c3aed;
  --highlight:#dbeafe;--highlight-b:#3b82f6;
  --reverted:#fef3c7;--reverted-b:#fbbf24;
  --syn-prop:#1d4ed8;--syn-val:#15803d;--syn-str:#b45309;
  --syn-num:#b45309;--syn-unit:#0891b2;--syn-sel:#be185d;
  --syn-at:#6b21a8;--syn-comment:#94a3b8;--syn-punct:#64748b;
  --font-mono:'DM Mono',monospace;--font-sans:'DM Sans',sans-serif;
  --radius:16px;--radius-sm:6px;
  --shadow-lg:0 8px 32px rgba(37,99,235,.10);
  --page-px:clamp(20px,5vw,60px);
}
 
 
/* ── Tool section ── */
.tool-section{padding:20px;max-width:1200px;width:100%;margin:0 auto;display:flex;flex-direction:column;gap:18px;box-sizing:border-box}
.panel-label{font-size:1rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--gray--500);display:flex;align-items:center;gap:10px;margin-bottom:8px}
.panel-label::after{content:'';flex:1;height:1px;background:var(--gray--100)}
.panel-label-row{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.panel-label-row .panel-label{margin-bottom:0;flex:1}
 
/* ── Code editor area ── */
.editor-wrap{position:relative;border:1px solid var(--gray--200);border-radius:var(--radius);background:#fff;height:300px;overflow:hidden;transition:border-color .15s,box-shadow .15s}
.editor-wrap.drag-over{border-color:var(--blue--400);box-shadow:0 0 0 3px rgba(59,130,246,.15);background:var(--blue--50)}
.editor-wrap.focused{border-color:var(--blue--400);box-shadow:0 0 0 3px rgba(59,130,246,.12);background:#fff}
 
textarea.code-input{font-family:var(--font-mono);font-size:.8rem!important;line-height:1.6;resize:none;border:none!important;border-radius:0;padding:16px 20px;background:transparent;color:var(--gray--900);outline:none;width:100%;height:100%;tab-size:2;overflow:auto;position:relative;z-index:1}
textarea.code-input::placeholder{color:var(--gray--400)}
 
/* ── Output ── */
.output-wrap{position:relative;border:1px solid var(--gray--200);border-radius:var(--radius);background:#fff;height:400px;overflow:hidden;display:flex;flex-direction:column;transition:border-color .15s}
.output-wrap.has-output{background:#fff;border-color:var(--blue--200)}
#output-code{font-family:var(--font-mono);font-size:.82rem;line-height:1.6;padding:16px 20px;overflow:auto;flex:1;display:flex;flex-direction:column;color:var(--gray--700);min-width:0}
#output-code .line{display:block;white-space:pre;border-radius:3px;padding:0 4px;margin:0 -4px;position:relative;line-height:1.6;font-size:.82rem;flex-shrink:0}
 
/* Safe conversions - very subtle tint, left border only marker */
#output-code .line.changed{background:var(--blue--100);border-left:3px solid var(--blue--300);margin:2px 0;padding-left:5px;margin-left:-8px;cursor:pointer}
#output-code .line.changed:hover{background:var(--blue--200)}
 
/* Review-worthy conversions - amber tint to draw the eye */
#output-code .line.changed.review{background:#fff8dc;border-left:3px solid var(--amber-400);margin:2px 0;margin-left:-8px;}
#output-code .line.changed.review:hover{background:var(--amber-100)}
 
/* Reverted lines - green, clearly distinct from blue safe and amber review */
#output-code .line.reverted{background:#e3fbea;border-left:3px solid green;margin:2px 0;padding-left:5px;margin-left:-8px;cursor:pointer}
#output-code .line.reverted:hover{background:#d2f9de}
 
/* Tooltip - hidden by default, shown on hover only */
.line-tip{display:none;position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:.65rem;font-weight:500;font-family:var(--font-sans);background:var(--blue--600);color:#fff;padding:2px 8px;border-radius:20px;white-space:nowrap;pointer-events:none;z-index:2;opacity:0;transition:opacity .12s}
.line.changed:hover .line-tip{display:inline-block;opacity:1}
.line.changed.review:hover .line-tip{background:var(--amber-600)}
.line.reverted:hover .line-tip{display:inline-block;opacity:1;background:#16a34a}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:10px;color:var(--gray--400);font-size:.85rem;text-align:center;padding:40px;pointer-events:none}
.empty-state svg{opacity:.4}
.no-changes-notice{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:8px;text-align:center;padding:40px;pointer-events:none}
.no-changes-notice svg{stroke:#16a34a;opacity:.7;margin-bottom:4px}
.no-changes-title{font-size:.9rem;font-weight:600;color:#16a34a}
.no-changes-body{font-size:.8rem;color:var(--gray-400);max-width:280px;line-height:1.5}

 
/* ── Syntax highlighting tokens ── */
.tk-sel{color:var(--syn-sel)}
.tk-at{color:var(--syn-at)}
.tk-prop{color:var(--syn-prop)}
.tk-val{color:var(--syn-val)}
.tk-str{color:var(--syn-str)}
.tk-num{color:var(--syn-num)}
.tk-unit{color:var(--syn-unit)}
.tk-punct{color:var(--syn-punct)}
.tk-comment{color:var(--syn-comment);font-style:italic}
 
/* ── Buttons ── */
.btn1{font-family:var(--font-sans);font-size:.84rem;font-weight:500;border:none;border-radius:var(--radius-sm);cursor:pointer;padding:9px 18px;display:inline-flex;align-items:center;gap:7px;transition:background .15s,transform .1s,box-shadow .15s;white-space:nowrap}
.btn1:active{transform:translateY(1px)}
.btn1-primary{background:var(--blue--600);color:#fff;box-shadow:0 1px 3px rgba(37,99,235,.3)}
.btn1-primary:hover{background:var(--blue--700);box-shadow:var(--shadow-lg)}
.btn1-ghost{background:#fff;color:var(--gray--500);border:1.5px solid var(--gray--200)}
.btn1-ghost:hover{background:var(--gray--50);color:var(--gray--700);border-color:var(--gray--300)}
.btn1-copy{background:var(--green-100);color:var(--green-600);border:1px solid var(--green-600);margin-left:auto}
.btn1-copy:hover{background:#bbf7d0}
.btn1-dl{background:var(--violet-100);color:var(--violet-600);border:1px solid var(--violet-600)}
.btn1-dl:hover{background:#ddd6fe}
.btn1-sm{padding:6px 12px;font-size:.78rem}
.action-bar{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
 
/* ── Warning banner ── */
.warning-banner{display:none;background:var(--amber-100);border:1.5px solid var(--amber-400);border-radius:var(--radius-sm);padding:12px 16px;font-size:.8rem;line-height:1.6;color:#92400e;gap:10px;align-items:flex-start}
.warning-banner.visible{display:flex}
.warning-banner svg{flex-shrink:0;margin-top:2px}
 
/* ── Bottom bar ── */
.bottom-bar{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.summary-bar{display:flex;align-items:center;gap:20px;flex:1;flex-wrap:wrap}
.summary-legend{display:flex;align-items:center;gap:8px;font-size:.73rem;color:var(--gray--500);font-weight:500;flex-shrink:0}
.swatch{display:inline-block;width:10px;height:10px;border-radius:2px;flex-shrink:0;margin-left:6px}
.swatch:first-child{margin-left:0}
.swatch-safe{background:#93c5fd;border:1px solid var(--blue--300)}
.swatch-review{background:var(--amber-400);border:1px solid #f59e0b}
.swatch-reverted{background:#16a34a;border:1px solid #16a34a}
.summary-text{font-size:.85rem;color:var(--gray--500);font-family:var(--font-mono)}
 
/* ── Simulator ── */
.sim-section{background:var(--gray--50);border-top:1.5px solid var(--gray--100);border-bottom:1.5px solid var(--gray--100)}
.sim-inner{padding:20px;max-width:1200px;width:100%;margin:0 auto;box-sizing:border-box}
.sim-header{display:flex;align-items:center;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.sim-title{font-size:1rem;font-weight:600;letter-spacing:-.02em}
.sim-controls{display:flex;gap:8px;flex-wrap:wrap;margin-left:auto}
.mode-btn{font-family:var(--font-sans);font-size:.78rem;font-weight:500;border:1.5px solid var(--gray--200);border-radius:var(--radius-sm);cursor:pointer;padding:7px 14px;background:#fff;color:var(--gray--500);transition:all .15s}
.mode-btn.active{background:var(--blue--600);color:#fff;border-color:var(--blue--600)}
.mode-btn:hover:not(.active){background:var(--gray--100);color:var(--gray--700)}
.sim-stage{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.sim-box-wrap{border:1.5px solid var(--gray--200);border-radius:var(--radius);background:#fff;padding:20px;overflow:hidden}
.sim-box-label{font-size:.75rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--gray--500);margin-bottom:14px;display:flex;align-items:center;gap:8px}
.sim-box-label .dir-badge{font-size:.65rem;background:var(--blue--50);color:var(--blue--600);border:1px solid var(--blue--200);border-radius:20px;padding:2px 8px;text-transform:none;letter-spacing:0;font-weight:500}
.sim-demo{position:relative;background:var(--gray--50);border-radius:8px;height:160px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.sim-elem{position:relative;background:#fff;border:1.5px solid var(--blue--200);border-radius:6px;transition:all .5s cubic-bezier(.4,0,.2,1);display:flex;align-items:center;justify-content:center;font-family:var(--font-mono);font-size:.72rem;color:var(--blue--600);font-weight:500}
.sim-label-ms{position:absolute;font-size:.6rem;font-weight:600;font-family:var(--font-mono);background:var(--blue--600);color:#fff;border-radius:3px;padding:1px 5px;pointer-events:none;transition:all .5s cubic-bezier(.4,0,.2,1)}
.sim-label-me{position:absolute;font-size:.6rem;font-weight:600;font-family:var(--font-mono);background:var(--green-600);color:#fff;border-radius:3px;padding:1px 5px;pointer-events:none;transition:all .5s cubic-bezier(.4,0,.2,1)}
.sim-label-bs{position:absolute;font-size:.6rem;font-weight:600;font-family:var(--font-mono);background:var(--amber-600);color:#fff;border-radius:3px;padding:1px 5px;pointer-events:none;transition:all .5s cubic-bezier(.4,0,.2,1)}
.sim-label-be{position:absolute;font-size:.6rem;font-weight:600;font-family:var(--font-mono);background:#9333ea;color:#fff;border-radius:3px;padding:1px 5px;pointer-events:none;transition:all .5s cubic-bezier(.4,0,.2,1)}
.sim-code{margin-top:12px;font-family:var(--font-mono);font-size:.75rem;line-height:1.6;color:var(--gray--500);background:var(--gray--50);border:1px solid var(--gray--200);border-radius:6px;padding:10px 14px}
.sim-code span{color:var(--blue--600);font-weight:500}
 
/* ── Axis explainer ── */
.explainer-section{border-bottom:1.5px solid var(--gray--100)}
.explainer-inner{padding:20px;max-width:1200px;width:100%;margin:0 auto;box-sizing:border-box}
.explainer-eyebrow{font-size:1rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--blue--500);margin-bottom:10px}
.explainer-title{font-size:1.3rem;font-weight:600;letter-spacing:-.025em;margin-bottom:8px}
.explainer-body{font-size:.88rem;line-height:1.7;color:var(--gray--500);margin-bottom:28px;}
.explainer-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
.explainer-card{border:1.5px solid var(--gray--100);border-radius:var(--radius);padding:20px;background:#fff}
.explainer-card-title{font-size:.8rem;font-weight:600;color:var(--gray--700);margin-bottom:14px;display:flex;align-items:center;gap:8px}
.explainer-card-title svg{flex-shrink:0}
/* SVG diagram inside explainer */
.axis-svg{width:100%;height:auto;display:block}
 
/* ── Divider ── */
hr.divider{border:none;border-top:1.5px solid var(--gray--400)}
 
/* ── About / FAQ (same as before, condensed) ── */
.about-section{padding:20px;max-width:1200px;width:100%;margin:0 auto;box-sizing:border-box}
.about-inner{display:grid;grid-template-columns:1fr;gap:56px;align-items:start}
.about-content{display:flex;flex-direction:column;gap:48px}
.about-block-title{font-size:1.1rem;font-weight:600;letter-spacing:-.02em;color:var(--gray--900);margin-bottom:14px;display:flex;align-items:center;gap:10px}
.title-icon{width:28px;height:28px;background:var(--blue--50);border:1.5px solid var(--blue--100);border-radius:7px;display:grid;place-items:center;flex-shrink:0}
.about-block p{font-size:.875rem;line-height:1.76;margin-bottom:10px}
.about-block p:last-child{margin-bottom:0}
.about-block p strong{color:var(--gray--700);font-weight:500}
.about-block a{color:var(--blue--600)}
.conv-table{width:100%;border-collapse:collapse;font-size:.85rem;margin-top:18px;border:1.5px solid var(--gray--100);border-radius:var(--radius);overflow:hidden}
.conv-table th{background:var(--gray--50);font-weight:600;font-size:.85rem;letter-spacing:.07em;text-transform:uppercase;color:var(--gray--500);padding:10px 14px;text-align:left;border-bottom:1.5px solid var(--gray--100)}
.conv-table td{padding:8px 14px;border-bottom:1px solid var(--gray--100);font-family:var(--font-mono);color:var(--gray--700);vertical-align:middle}
.conv-table tr:last-child td{border-bottom:none}
.conv-table td.arrow{color:var(--gray--400);font-family:var(--font-sans);text-align:center;width:28px}
.conv-table td.logical{color:var(--blue--600)}
.conv-table td.review{font-family:var(--font-sans);font-size:.75rem;font-weight:600;color:var(--amber-600);white-space: nowrap;}
.conv-table tr.group td{background:var(--gray--50);font-family:var(--font-sans);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--gray--500);padding:7px 14px;border-bottom:1px solid var(--gray--100)}
.conv-table td a {
  color: inherit;
  text-decoration: none;
  display: inline;
  width: 100%;
}
.conv-table td a:hover {
  text-decoration: underline;
}
.conv-table td.logical a {
  color: var(--blue-600);
}

/* ── Responsive ── */
@media(max-width:900px){
  .sim-stage{grid-template-columns:1fr}
  .explainer-grid{grid-template-columns:1fr 1fr}
  .about-inner{grid-template-columns:1fr}
}
@media(max-width:600px){
  .explainer-grid{grid-template-columns:1fr}
}