/* Foto tamaño infantil — es-MX tool (browser-local) */
:root{
  --ink:#122018;
  --ink-2:#2a3d32;
  --muted:#5a6e62;
  --paper:#f3f1ea;
  --paper-2:#e8e5db;
  --surface:#fff;
  --line:rgba(18,32,24,.1);
  --line-strong:rgba(18,32,24,.16);
  --accent:#0f6b4c;
  --accent-2:#0a533a;
  --accent-soft:#e6f4ed;
  --ok:#157a3f;
  --ok-bg:#e6f5eb;
  --warn:#8a5a00;
  --warn-bg:#fff6e5;
  --warn-line:#efd39a;
  --danger:#9b1c1c;
  --danger-bg:#fdecec;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 1px 2px rgba(18,32,24,.04),0 16px 40px rgba(18,32,24,.07);
  --shadow-sm:0 1px 2px rgba(18,32,24,.05),0 6px 16px rgba(18,32,24,.05);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --wrap:1040px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font:16.5px/1.65 var(--font);
  color:var(--ink);
  background:
    radial-gradient(1100px 480px at 8% -8%,rgba(15,107,76,.09),transparent 55%),
    radial-gradient(800px 420px at 96% 0%,rgba(180,140,60,.06),transparent 50%),
    var(--paper);
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-underline-offset:3px}
a:hover{color:var(--accent-2)}
img,canvas{max-width:100%;height:auto}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
header{
  position:sticky;top:0;z-index:50;
  background:rgba(243,241,234,.82);
  backdrop-filter:saturate(1.2) blur(12px);
  -webkit-backdrop-filter:saturate(1.2) blur(12px);
  border-bottom:1px solid var(--line);
}
header .wrap{padding:12px 20px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.brand{
  font-weight:750;font-size:1.1rem;letter-spacing:-.02em;
  text-decoration:none;color:var(--ink);margin-right:auto;
}
.brand span{color:var(--accent)}
nav{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
nav a{
  text-decoration:none;color:var(--ink-2);font-size:.9rem;font-weight:550;
}
nav a:hover{color:var(--accent)}

footer{
  margin-top:64px;border-top:1px solid var(--line);
  background:rgba(255,255,255,.55);font-size:.9rem;color:var(--muted);
}
footer .wrap{padding:24px 20px 36px}
footer a{color:var(--ink-2)}

main.wrap{padding-top:24px;padding-bottom:48px}

h1,h2,h3{font-weight:700;letter-spacing:-.025em;line-height:1.18;color:var(--ink)}
h1{font-size:clamp(1.85rem,4.2vw,2.75rem);margin:8px 0 12px}
h2{font-size:clamp(1.3rem,2.4vw,1.65rem);margin:48px 0 12px}
h3{font-size:1.08rem;margin:0 0 8px}
.lead{font-size:clamp(1.02rem,1.5vw,1.15rem);line-height:1.6;color:var(--ink-2);max-width:44rem;margin:0 0 20px}
.small{font-size:.86rem;color:var(--muted);line-height:1.5}
p{margin:0 0 1em}
ul,ol{margin:0 0 1.1em;padding-left:1.2em}
li{margin:.35em 0}
li::marker{color:var(--accent)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--ok-bg);color:var(--ok);
  border:1px solid rgba(21,122,63,.18);
  border-radius:999px;padding:6px 12px;
  font-size:.8rem;font-weight:650;margin:0 0 14px;
}
.badge.warn-b{
  background:var(--warn-bg);color:var(--warn);border-color:var(--warn-line);
}
.card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px;margin:16px 0;box-shadow:var(--shadow-sm);
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;border-radius:999px;padding:11px 16px;
  font:650 .95rem/1 var(--font);cursor:pointer;
  background:var(--accent);color:#fff;text-decoration:none;
  box-shadow:0 8px 20px rgba(15,107,76,.22);
  transition:transform .15s var(--ease),background .15s var(--ease);
  -webkit-tap-highlight-color:transparent;
}
.btn:hover{background:var(--accent-2);transform:translateY(-1px);color:#fff}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn.sec{
  background:rgba(255,255,255,.92);color:var(--ink);
  border:1px solid var(--line-strong);box-shadow:none;
}
.btn.sec:hover{background:#fff;border-color:var(--accent);color:var(--accent)}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:10px 0}
.step-label{
  font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--accent);margin:18px 0 6px;
}
.warn{
  background:var(--warn-bg);border:1px solid var(--warn-line);
  color:var(--warn);border-radius:var(--radius-sm);padding:10px 12px;font-size:.9rem;
}
.alert-no{
  background:var(--danger-bg);border:1px solid rgba(155,28,28,.2);
  color:var(--danger);border-radius:var(--radius-sm);padding:12px 14px;font-size:.92rem;
}
.alert-no strong{display:block;margin-bottom:4px}

.tool-shell{
  display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start;
}
@media (max-width:820px){
  .tool-shell{grid-template-columns:1fr}
}
.stage{
  position:relative;width:100%;max-width:320px;margin:0 auto;
  aspect-ratio:5/6;background:var(--paper-2);
  border:1px dashed var(--line-strong);border-radius:12px;overflow:hidden;
  touch-action:none;cursor:grab;
}
.stage:active{cursor:grabbing}
.stage canvas{display:block;width:100%;height:100%;object-fit:contain}
.stage[data-empty]::before{
  content:attr(data-empty);position:absolute;inset:0;display:grid;place-items:center;
  color:var(--muted);font-size:.9rem;pointer-events:none;padding:16px;text-align:center;
}
.stage.has-img[data-empty]::before{display:none}

.checks{list-style:none;padding:0;margin:8px 0}
.checks li{padding:6px 10px;border-radius:8px;font-size:.88rem;margin:.3em 0}
.checks .ok{background:var(--ok-bg);color:var(--ok)}
.checks .bad{background:var(--danger-bg);color:var(--danger)}
.checks .pend{background:var(--paper-2);color:var(--muted)}

table.medidas{
  width:100%;border-collapse:collapse;font-size:.95rem;margin:12px 0 20px;
  background:var(--surface);border-radius:12px;overflow:hidden;
  border:1px solid var(--line);
}
table.medidas th,table.medidas td{
  text-align:left;padding:10px 14px;border-bottom:1px solid var(--line);
}
table.medidas th{background:var(--accent-soft);font-weight:650;color:var(--accent-2)}
table.medidas tr:last-child td{border-bottom:0}
table.medidas td:nth-child(2),table.medidas td:nth-child(3){font-variant-numeric:tabular-nums}

.compare{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin:16px 0;
}
.compare .card{margin:0}
.compare .card.yes{border-color:rgba(15,107,76,.35)}
.compare .card.no{border-color:rgba(155,28,28,.25);opacity:.95}
.compare .tag{
  display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.06em;
  text-transform:uppercase;padding:3px 8px;border-radius:999px;margin-bottom:8px;
}
.compare .yes .tag{background:var(--ok-bg);color:var(--ok)}
.compare .no .tag{background:var(--danger-bg);color:var(--danger)}

details{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:12px 16px;margin:8px 0;
}
details summary{cursor:pointer;font-weight:650;color:var(--ink)}
details[open] summary{margin-bottom:8px}
details p{margin:0;color:var(--ink-2)}

.sheetprev{
  display:block;margin-top:12px;border:1px solid var(--line);
  border-radius:8px;max-width:100%;
}
#status{min-height:1.4em;color:var(--ink-2);font-size:.92rem}
label.small{display:inline-flex;align-items:center;gap:8px}
input[type=range]{width:min(220px,100%);accent-color:var(--accent)}
select{
  font:inherit;padding:8px 12px;border-radius:999px;
  border:1px solid var(--line-strong);background:#fff;
}

.howto{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.howto .card{margin:0}
.howto .n{
  width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;
  display:grid;place-items:center;font-weight:700;font-size:.85rem;margin-bottom:8px;
}