:root{
  --bg:#faf8f5;--surface:#fff;--ink:#1d1b19;--muted:#615b54;--line:#e7e1d8;
  --brand:#c2410c;--brand-ink:#fff;--brand-soft:#fff1e8;--accent:#0f766e;--accent-soft:#e6f4f2;
  --radius:14px;--shadow:0 1px 2px rgba(0,0,0,.05),0 8px 24px rgba(30,20,10,.06);
  --max:1120px;color-scheme:light;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
img{max-width:100%;height:auto}
a{color:var(--brand)}
a:hover{text-decoration-thickness:2px}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em;margin:0 0 .5em}
h1{font-size:clamp(1.8rem,4.2vw,2.8rem)}
h2{font-size:clamp(1.35rem,2.6vw,1.8rem);margin-top:1.8em}
h3{font-size:1.1rem;margin-top:1.4em}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:8px;background:#fff;padding:8px;z-index:10}

/* Header */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);text-decoration:none;font-size:1.05rem}
.logo-mark{width:30px;height:30px;flex:none;color:var(--brand)}
.logo b{color:var(--brand);font-weight:800}
.nav{display:flex;gap:18px;flex-wrap:wrap}
.nav a{color:var(--muted);text-decoration:none;font-size:.95rem}
.nav a:hover,.nav a[aria-current=page]{color:var(--ink)}
.logo,.nav a{white-space:nowrap}
@media (max-width:420px){.nav .hide-xs{display:none}}
@media (max-width:640px){.nav{gap:14px;flex-wrap:nowrap}.nav a{font-size:.88rem}.nav .hide-sm{display:none}.logo{font-size:.98rem}}

/* Hero + calculator */
.hero{padding:36px 0 8px}
.lead{font-size:1.1rem;color:var(--muted);max-width:62ch}
.updated{font-size:.85rem;color:var(--muted)}
.calc-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:24px;align-items:start;margin:24px 0}
@media (max-width:900px){.calc-grid{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.card h2{margin-top:0;font-size:1.2rem}
.field{margin-bottom:16px}
.field label,.field legend{display:block;font-weight:600;margin-bottom:6px;font-size:.95rem}
.hint{display:block;font-weight:400;color:var(--muted);font-size:.85rem}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px;align-items:end}
input[type=number],select{width:100%;font:inherit;padding:11px 12px;border:1px solid #cfc7bc;border-radius:10px;background:#fff;color:var(--ink)}
input[type=number]:focus,select:focus{outline:3px solid var(--brand-soft);border-color:var(--brand)}
fieldset{border:0;padding:0;margin:0 0 16px}
.choices{display:grid;gap:8px}
.choice{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);border-radius:10px;cursor:pointer;font-weight:500}
.choice:has(input:checked){border-color:var(--brand);background:var(--brand-soft)}
.choice input{margin-top:4px;accent-color:var(--brand)}
.checks{display:grid;gap:8px}
.check{display:flex;gap:10px;align-items:center;font-weight:500}
.check input{width:18px;height:18px;accent-color:var(--brand)}

.result{position:sticky;top:76px}
@media (max-width:900px){.result{position:static}}
.total{font-size:clamp(1.9rem,4vw,2.4rem);font-weight:800;color:var(--brand);margin:.1em 0}
.total small{display:block;font-size:.9rem;font-weight:500;color:var(--muted)}
.breakdown{width:100%;border-collapse:collapse;margin:14px 0;font-size:.93rem}
.breakdown th,.breakdown td{padding:9px 6px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.breakdown td:last-child,.breakdown th:last-child{text-align:right;white-space:nowrap}
.breakdown .det{display:block;color:var(--muted);font-size:.82rem}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:12px 0}
.stat{background:var(--accent-soft);border-radius:10px;padding:10px;text-align:center}
.stat b{display:block;font-size:1.15rem;color:var(--accent)}
.stat span{font-size:.78rem;color:var(--muted)}
.note{font-size:.84rem;color:var(--muted)}
.error{color:#b91c1c;font-weight:600}

/* Content */
.content{max-width:760px}
.content table{width:100%;border-collapse:collapse;margin:1em 0;font-size:.95rem;background:var(--surface)}
.content th,.content td{border:1px solid var(--line);padding:9px 10px;text-align:left}
.content th{background:#f3eee7}
.table-scroll{overflow-x:auto}
.callout{background:var(--accent-soft);border-left:4px solid var(--accent);padding:14px 16px;border-radius:8px;margin:1.2em 0}
.callout.warn{background:var(--brand-soft);border-color:var(--brand)}
.size-links{display:flex;flex-wrap:wrap;gap:8px;padding:0;list-style:none}
.size-links a{display:inline-block;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:var(--surface);text-decoration:none;color:var(--ink)}
.size-links a:hover{border-color:var(--brand)}
details{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:8px 0}
summary{font-weight:600;cursor:pointer}
details p{margin:.6em 0 0}
.breadcrumb{font-size:.85rem;color:var(--muted);margin:18px 0 0}
.breadcrumb a{color:var(--muted)}

/* Lista de compra */
.shopping{margin:0 0 24px}
.shop-list{list-style:none;margin:8px 0 0;padding:0}
.shop-list li{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line)}
.shop-list li:last-child{border-bottom:0}
.shop-list .det{display:block;color:var(--muted);font-size:.84rem;margin-top:2px}
.shop-list .qty{text-align:right;font-weight:700;white-space:nowrap}
.aff{display:flex;flex-direction:column;gap:4px;margin-top:6px}
.aff-link{font-size:.85rem;font-weight:600}
.aff-disclosure{margin-top:12px}
@media (max-width:640px){.shop-list li{flex-direction:column;gap:4px}.shop-list .qty{text-align:left}}

/* Tarjetas de calculadoras y guías */
.calc-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:12px 0 8px}
.calc-card{display:flex;flex-direction:column;gap:6px;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);text-decoration:none;color:var(--ink)}
.calc-card:hover{border-color:var(--brand)}
.calc-card span:last-child{color:var(--muted);font-size:.92rem}
.calc-cat{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--brand)}

/* Bloques manuales de AdSense (solo si se configuran slots). Altura reservada para evitar CLS. */
.ad-slot{min-height:280px;margin:24px auto;max-width:var(--max)}

/* Footer */
.site-footer{margin-top:56px;border-top:1px solid var(--line);background:var(--surface);padding:28px 0;font-size:.9rem;color:var(--muted)}
.site-footer nav{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:10px}
.site-footer a{color:var(--muted)}
@media print{.site-header,.site-footer,.ad-slot{display:none}}