:root{--brand:#0B5F8A;--accent:#F2A900}:root[data-theme="dark"]{--brand:#6CC4EE}
:root{
  --bg:#FFFFFF; --surface:#F5F7F9; --ink:#0F1C26; --muted:#52636F; --line:#D8E0E6; --brand-ink:#FFFFFF; --accent-ink:#1E1500;
  --ok:#0B7A4B; --bad:#B42318; --radius:10px; --maxw:1040px; color-scheme:light;
  --font:"Avenir Next","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif; --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
:root[data-theme="dark"]{
  --bg:#0B141B; --surface:#111E28; --ink:#E8EFF4; --muted:#9DB0BD; --line:#24394A; --brand-ink:#06202F; --accent-ink:#1E1500;
  --ok:#4AD494; --bad:#FF8A80; color-scheme:dark}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 var(--font)}
a{color:var(--brand)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.skip-link{position:absolute;top:-120px;left:16px;z-index:10000;padding:10px 16px;background:var(--accent);color:var(--accent-ink);font-weight:700;border-radius:6px;text-decoration:none;transition:top .15s}
.skip-link:focus{top:16px}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
/* Cabecera */
header.top{background:var(--brand);color:var(--brand-ink);position:relative;z-index:50}
:root[data-theme="dark"] header.top{background:var(--surface);color:var(--ink);border-bottom:1px solid var(--line)}
header.top .wrap{position:relative}
header.top .bar{display:flex;align-items:center;gap:14px;padding-block:10px}
.logo{font-weight:800;font-size:1.3rem;letter-spacing:-.01em;color:inherit;text-decoration:none;white-space:nowrap;flex-shrink:0}
.logo b{background:var(--accent);color:var(--accent-ink);padding:1px 7px;border-radius:6px;margin-left:2px}
nav.inline{display:flex;gap:4px;margin-left:8px;min-width:0;flex-wrap:wrap}
nav.inline a{color:inherit;text-decoration:none;font-weight:600;font-size:.92rem;padding:7px 11px;border-radius:8px;opacity:.9}
nav.inline a:hover{background:color-mix(in srgb,currentColor 14%,transparent);opacity:1}
nav.inline a[aria-current]{background:color-mix(in srgb,currentColor 20%,transparent);opacity:1}
.bar-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
.menu-btn,.theme-btn{display:inline-flex;align-items:center;gap:7px;min-height:40px;padding:6px 12px;background:color-mix(in srgb,currentColor 12%,transparent);color:inherit;border:1px solid color-mix(in srgb,currentColor 24%,transparent);border-radius:8px;font:inherit;font-size:.88rem;font-weight:600;cursor:pointer}
.menu-btn:hover,.theme-btn:hover{background:color-mix(in srgb,currentColor 22%,transparent)}
.menu-btn .badge{background:var(--accent);color:var(--accent-ink);padding:0 7px;border-radius:10px;font-size:.74rem;font-weight:800}
.theme-btn .i-sun{display:none}
:root[data-theme="dark"] .theme-btn .i-sun{display:inline-flex}
:root[data-theme="dark"] .theme-btn .i-moon{display:none}
@media (max-width:720px){nav.inline{display:none}}
@media (max-width:420px){.menu-btn span:not(.badge){display:none}}
/* Menú de herramientas */
.menu-panel{background:var(--bg);color:var(--ink);border:1px solid var(--line);border-radius:0 0 var(--radius) var(--radius);box-shadow:0 14px 30px rgba(0,0,0,.2);position:absolute;left:0;right:0;top:100%;padding:18px 16px 22px;max-height:80vh;overflow:auto}
.menu-panel[hidden]{display:none}
.menu-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px 28px}
.menu-col h2{font-size:.78rem;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:0 0 8px}
.menu-col ul{list-style:none;margin:0;padding:0}
.menu-col li{margin:0}
.menu-col a{display:flex;align-items:center;gap:9px;padding:7px 8px;border-radius:8px;color:var(--ink);text-decoration:none;font-size:.95rem;font-weight:600}
.menu-col a:hover{background:var(--surface);color:var(--brand)}
.menu-col a[aria-current]{background:var(--surface);color:var(--brand)}
.menu-col .ico{color:var(--brand);flex-shrink:0}
/* Contenido */
main{padding-block:26px 56px}
.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:10px}
.crumbs a{color:var(--muted)}
h1{font-size:clamp(1.7rem,4.5vw,2.5rem);line-height:1.12;letter-spacing:-.02em;margin:0 0 10px;text-wrap:balance}
h2{font-size:1.45rem;line-height:1.2;margin:38px 0 12px;letter-spacing:-.01em;text-wrap:balance}
h3{font-size:1.1rem;margin:22px 0 6px}
p{margin:0 0 14px;max-width:72ch}
.lead{font-size:1.1rem;color:var(--muted);max-width:64ch}
ul,ol{max-width:72ch;padding-left:1.3em}
li{margin-bottom:6px}
.text h2:first-child{margin-top:28px}
article.text{overflow-wrap:anywhere}
.note{font-size:.88rem;color:var(--muted)}
/* Herramienta */
.tool{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:22px;margin:18px 0 8px}
.grid2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px;margin-top:18px}
@media (max-width:820px){.grid2{grid-template-columns:minmax(0,1fr)}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;min-width:0}
.panel h2{margin:0 0 14px;font-size:1.12rem}
.panel.result{border-color:var(--brand);border-width:2px}
.field{display:flex;flex-direction:column;gap:5px;margin-bottom:14px;min-width:0}
.field label,.lbl{font-weight:600;font-size:.95rem}
.field .hint{font-size:.85rem;color:var(--muted)}
input[type=number],input[type=text],input[type=date],input[type=time],input[type=datetime-local],select,textarea{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);width:100%;min-width:0}
textarea{resize:vertical;min-height:120px;line-height:1.4}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.row3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}
.row4{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
@media (max-width:520px){.row3{gap:6px}.row4{grid-template-columns:1fr 1fr}}
.btn{font:inherit;font-weight:700;background:var(--accent);color:var(--accent-ink);border:0;border-radius:9px;padding:11px 20px;cursor:pointer;min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none}
.btn:hover{filter:brightness(1.07)}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-brand{background:var(--brand);color:var(--brand-ink)}
.btn-alt{background:transparent;color:var(--ink);border:2px solid var(--line)}
.btn-alt:hover{border-color:var(--ink);filter:none}
.btn-sm{min-height:36px;padding:6px 12px;font-size:.88rem}
.btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.linkbtn{font:inherit;background:none;border:0;padding:0;color:var(--brand);text-decoration:underline;cursor:pointer}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px;padding:0;list-style:none;max-width:none}
.chip{font:inherit;font-size:.9rem;font-weight:600;padding:6px 13px;border-radius:99px;background:var(--bg);border:1px solid var(--line);color:var(--ink);cursor:pointer}
.chip:hover,.chip.on{border-color:var(--brand);color:var(--brand)}
.chip.on{background:color-mix(in srgb,var(--brand) 12%,var(--bg))}
.big{font-size:clamp(2rem,6vw,2.8rem);font-weight:800;letter-spacing:-.02em;line-height:1.1;color:var(--brand);overflow-wrap:anywhere}
.big small{font-size:1rem;font-weight:500;color:var(--muted)}
.digits{font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:-.02em;line-height:1;color:var(--ink);text-align:center;font-size:clamp(2.6rem,12vw,5.6rem);padding:14px 0 18px;overflow-wrap:anywhere}
.digits .ms{font-size:.5em;color:var(--muted)}
.digits.done{color:var(--bad)}
table.bd{width:100%;border-collapse:collapse;margin-top:12px;font-size:.96rem}
table.bd td{padding:8px 0;border-bottom:1px solid var(--line);vertical-align:top}
table.bd td:last-child{text-align:right;font-variant-numeric:tabular-nums;padding-left:12px;overflow-wrap:anywhere}
table.bd tr.tot td{font-weight:800;border-bottom:0;padding-top:12px}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%;margin:12px 0 20px}
table.data{border-collapse:collapse;min-width:360px;font-size:.95rem;width:100%}
table.data th,table.data td{border:1px solid var(--line);padding:8px 12px;text-align:left}
table.data th{background:var(--surface)}
table.data td.n,table.data th.n{text-align:right;font-variant-numeric:tabular-nums}
.alert{background:var(--surface);border-left:4px solid var(--accent);padding:12px 16px;border-radius:4px;font-size:.93rem;margin:16px 0;max-width:72ch}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.laps{max-height:280px;overflow:auto;margin-top:6px}
.laps table{width:100%;border-collapse:collapse;font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:.95rem}
.laps td,.laps th{padding:6px 8px;border-bottom:1px solid var(--line);text-align:right}
.laps th{color:var(--muted);font-weight:600;font-size:.8rem}
.laps td:first-child,.laps th:first-child{text-align:left}
.laps tr.best td{color:var(--ok);font-weight:700}
.laps tr.worst td{color:var(--bad);font-weight:700}
.status{min-height:1.4em;font-size:.9rem;color:var(--muted)}
.status.ok{color:var(--ok);font-weight:600}
.status.err{color:var(--bad);font-weight:600}
/* Tarjetas y FAQ */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin-top:14px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-decoration:none;color:var(--ink);display:flex;flex-direction:column;gap:5px}
.card:hover{border-color:var(--brand)}
.card strong{font-size:1.05rem;color:var(--brand)}
.card span{color:var(--muted);font-size:.9rem;line-height:1.45}
.tile{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--brand);color:var(--brand-ink);margin-bottom:4px;font-style:normal}
details{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:12px 16px;margin-bottom:10px;max-width:72ch}
summary{cursor:pointer;font-weight:600}
details p{margin:10px 0 0}
/* Pie */
footer.bottom{background:var(--surface);border-top:1px solid var(--line);padding-block:26px;font-size:.9rem;color:var(--muted)}
footer.bottom .wrap{display:flex;flex-direction:column;gap:10px}
footer.bottom nav{display:flex;flex-wrap:wrap;gap:6px 18px}
footer.bottom p{margin:0}
footer .small{font-size:.82rem}
/* Publicidad: solo se muestra tras aceptar las cookies publicitarias */
.ad-slot{display:none;margin:22px 0;text-align:center;overflow:hidden}
html.ads-on .ad-slot{display:block;min-height:120px}
.ad-label{display:block;font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:4px}
/* Cookies */
body.has-cookiebar{padding-bottom:110px}
.cookiebar{position:fixed;left:0;right:0;bottom:0;z-index:1000;background:var(--surface);color:var(--ink);border-top:2px solid var(--brand);padding:14px max(16px,env(safe-area-inset-right,0px)) max(14px,env(safe-area-inset-bottom,0px)) max(16px,env(safe-area-inset-left,0px));display:flex;flex-wrap:wrap;gap:12px 20px;align-items:center;justify-content:space-between;box-shadow:0 -6px 20px rgba(0,0,0,.16)}
.cookiebar p{margin:0;max-width:72ch;font-size:.92rem;line-height:1.45}
.cookiebar-btns{display:flex;gap:10px;flex-shrink:0}
.cookiebar{max-height:88vh;overflow-y:auto}
.ck-main{flex:1 1 360px;min-width:0}
.ck-main a{color:var(--brand);font-weight:600}
.ck-config{margin-top:12px;display:grid;gap:8px}
.ck-cat{display:flex;gap:10px;align-items:flex-start;font-size:.88rem;line-height:1.4;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:9px 12px;cursor:pointer}
.ck-cat input{width:20px;height:20px;margin:1px 0 0;flex-shrink:0;accent-color:var(--brand)}
.ck-cat input:disabled{cursor:not-allowed}
@media (max-width:600px){
  body.has-cookiebar{padding-bottom:130px}
  .cookiebar{padding:10px 12px max(10px,env(safe-area-inset-bottom,0px));gap:8px}
  .cookiebar p{font-size:.82rem;line-height:1.3;width:100%}
  .cookiebar-btns{width:100%}
  .cookiebar .btn{flex:1 1 0;min-height:38px;padding:6px 8px;font-size:.86rem}
  .ck-cat{font-size:.8rem;padding:7px 10px}
}
/* Pantalla completa */
.fs-target:fullscreen{background:var(--bg);display:flex;flex-direction:column;justify-content:center;padding:24px;overflow:auto}
.fs-target:fullscreen .digits{font-size:min(22vw,28vh)}
@media print{
  header.top,.skip-link,.cookiebar,.no-print,footer,.menu-panel,.ad-slot,.btns,.crumbs{display:none!important}
  body{font-size:11pt;background:#fff;color:#000}
}
/* Cuenta atrás en cuatro celdas y barra de progreso */
.cd{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:12px 0}
.cd .cell{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:14px 4px;text-align:center;min-width:0}
.cd .n{font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:800;font-size:clamp(1.6rem,7vw,3.4rem);line-height:1.05;color:var(--brand)}
.cd .u{font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.progress{height:10px;background:var(--line);border-radius:99px;overflow:hidden;margin:4px 0 14px}
.progress span{display:block;height:100%;width:0;background:var(--brand);border-radius:99px;transition:width .25s linear}
.fs-target:fullscreen .cd .n{font-size:min(14vw,22vh)}
.center{text-align:center;justify-content:center}
.hide{display:none!important}
/* Conversor de unidades: dos campos con su unidad y un botón para intercambiarlos */
.conv-row{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:14px;align-items:end}
.conv-row .swap{margin-bottom:14px}
.conv-row .field input{font-size:1.25rem;font-weight:700}
@media (max-width:640px){.conv-row{grid-template-columns:minmax(0,1fr)}.conv-row .swap{justify-self:center;margin:0 0 10px}}
.conv-txt{font-size:1.2rem;font-weight:700;color:var(--brand);margin:6px 0 0;overflow-wrap:anywhere}
.formula{font-family:var(--mono);background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:10px 14px;display:inline-block;max-width:100%;overflow-x:auto}