/* Portada de BóvedaBTC · «Cámara acorazada»: grafito, acero y un solo acento de latón. */
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
.ancho { max-width: 1120px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
a { color: var(--boveda); }

/* Barra */
.barra { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10; background: rgba(17, 21, 24, .86); backdrop-filter: blur(10px); border-bottom: 1px solid var(--linea); }
.barra-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.marca { display: flex; align-items: center; gap: 10px; color: var(--pizarra); font-weight: 650; font-size: 18px; letter-spacing: -0.01em; text-decoration: none; }
.barra-nav { display: flex; align-items: center; gap: 22px; }
.barra-nav a:not(.boton-linea) { color: var(--gris); text-decoration: none; font-size: 15px; }
.barra-nav a:not(.boton-linea):hover { color: var(--pizarra); }
@media (max-width: 640px) { .barra-nav a:not(.boton-linea) { display: none; } }

/* Botones */
.boton, .boton-linea { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: var(--radio-s); font-weight: 600; font-size: 16px; text-decoration: none; cursor: pointer; border: 1px solid transparent; }
.boton { background: var(--boveda); color: var(--boveda-texto); }
.boton:hover { background: #D6B06C; }
.boton:disabled { opacity: .6; cursor: progress; }
.boton-linea { background: transparent; color: var(--pizarra); border-color: var(--linea); }
.boton-linea:hover { border-color: var(--gris); }
.barra .boton-linea { min-height: 38px; padding: 0 16px; font-size: 15px; }

/* Portada */
.portada { padding-block: 72px 80px; border-bottom: 1px solid var(--linea); }
.portada-in { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 56px; align-items: center; }
.portada h1 { font-size: clamp(38px, 6vw, 64px); line-height: 1.02; letter-spacing: -0.03em; font-stretch: 92%; margin: 0 0 20px; text-wrap: balance; }
.entrada { font-size: clamp(17px, 2vw, 19px); line-height: 1.6; color: #C9CDC9; max-width: 56ch; margin: 0 0 28px; }
.acciones { display: flex; flex-wrap: wrap; gap: 12px; }
.datos { list-style: none; padding: 0; margin: 36px 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; border-top: 1px solid var(--linea); padding-top: 22px; }
.datos li { display: grid; gap: 2px; }
.datos b { font-size: 22px; font-weight: 500; color: var(--boveda); }
.datos span { color: var(--gris); font-size: 14px; line-height: 1.35; }
@media (max-width: 880px) { .portada-in { grid-template-columns: 1fr; gap: 40px; } .portada { padding-block: 44px 56px; } }

/* Tarjeta de cobro de ejemplo, con el dial de confirmaciones */
.cobro { margin: 0; background: var(--placa); border: 1px solid var(--linea); border-radius: var(--radio-l); padding: 22px 22px 18px; box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .7); max-width: 400px; width: 100%; justify-self: center; }
.cobro figcaption { font-family: var(--mono); font-size: 12px; color: var(--gris); margin-bottom: 16px; }
.cobro-cab { display: flex; gap: 12px; align-items: center; }
.cobro-cab b { display: block; font-size: 16px; }
.cobro-cab small { color: var(--gris); font-size: 13px; }
.cobro-logo { width: 40px; height: 40px; border-radius: 50%; background: #0E7C86; color: #fff; display: grid; place-items: center; font-weight: 700; flex: none; }
.cobro-importe { font-size: 34px; margin: 18px 0 0; text-align: center; letter-spacing: -0.02em; }
.cobro-btc { margin: 2px 0 0; text-align: center; color: var(--gris); font-size: 15px; }
.dial { position: relative; width: 180px; max-width: 100%; aspect-ratio: 1; margin: 18px auto 14px; }
.dial svg { width: 100%; height: 100%; }
.dial-fondo { fill: none; stroke: var(--linea); stroke-width: 8; }
.seg { fill: none; stroke: var(--boveda); stroke-width: 8; stroke-linecap: butt; stroke-dasharray: 110; stroke-dashoffset: 110; animation: encender .7s cubic-bezier(.3, .7, .2, 1) forwards; }
.s1 { animation-delay: .5s; } .s2 { animation-delay: 1.2s; } .s3 { animation-delay: 1.9s; }
@keyframes encender { to { stroke-dashoffset: 0; } }
.dial-centro { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.dial-centro b { font-size: 30px; font-weight: 500; }
.dial-centro span { color: var(--ok); font-size: 13px; }
@media (prefers-reduced-motion: reduce) { .seg { animation: none; stroke-dashoffset: 0; } }
.cobro-lineas { margin: 0; display: grid; gap: 8px; border-top: 1px solid var(--linea); padding-top: 14px; }
.cobro-lineas div { display: flex; justify-content: space-between; gap: 12px; font-size: 13px; }
.cobro-lineas dt { color: var(--gris); }
.cobro-lineas dd { margin: 0; }

/* Secciones */
.seccion { padding-block: 80px; border-bottom: 1px solid var(--linea); }
.seccion-placa { background: #14191C; }
.seccion h2 { font-size: clamp(28px, 4vw, 40px); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 14px; text-wrap: balance; max-width: 22ch; }
.sub { color: var(--gris); font-size: 17px; line-height: 1.6; max-width: 58ch; margin: 0 0 12px; }
@media (max-width: 640px) { .seccion { padding-block: 56px; } }

.pasos { list-style: none; padding: 0; margin: 36px 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; counter-reset: none; }
.pasos li { padding: 0 28px 0 0; position: relative; }
.pasos li + li { padding-left: 28px; border-left: 1px solid var(--linea); }
.num { display: inline-grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--boveda); color: var(--boveda); border-radius: 50%; font-size: 15px; margin-bottom: 14px; }
.pasos h3 { margin: 0 0 6px; font-size: 19px; }
.pasos p { margin: 0; color: #C2C7C5; line-height: 1.6; }
@media (max-width: 820px) { .pasos { grid-template-columns: 1fr; gap: 28px; } .pasos li, .pasos li + li { padding: 0 0 0 0; border-left: 0; } .pasos li + li { padding-top: 28px; border-top: 1px solid var(--linea); } }

.rejilla { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--linea); border: 1px solid var(--linea); border-radius: var(--radio-l); overflow: hidden; margin-top: 32px; }
.rejilla article { background: #14191C; padding: 22px 22px 24px; }
.rejilla h3 { margin: 0 0 6px; font-size: 17px; color: var(--boveda); }
.rejilla p { margin: 0; color: #C2C7C5; line-height: 1.55; font-size: 15px; }
@media (max-width: 880px) { .rejilla { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .rejilla { grid-template-columns: 1fr; } }

.dos-col { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; align-items: start; }
@media (max-width: 880px) { .dos-col { grid-template-columns: 1fr; gap: 28px; } }
.usos { list-style: none; padding: 0; margin: 0; display: grid; gap: 0; }
.usos li { display: grid; gap: 2px; padding: 16px 0; border-top: 1px solid var(--linea); }
.usos li:last-child { border-bottom: 1px solid var(--linea); }
.usos b { font-size: 17px; }
.usos span { color: var(--gris); }

/* Formulario */
.formulario { display: grid; gap: 14px; background: var(--placa); border: 1px solid var(--linea); border-radius: var(--radio-l); padding: 24px; min-width: 0; }
.fila { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; }
@media (max-width: 560px) { .fila { grid-template-columns: 1fr; } .formulario { padding: 18px; } }
.formulario label { display: grid; gap: 6px; font-size: 14px; color: var(--gris); }
.formulario label small { color: var(--gris); opacity: .8; }
.formulario input, .formulario textarea { width: 100%; min-height: 46px; background: var(--acero); border: 1px solid var(--linea); border-radius: var(--radio-s); color: var(--pizarra); padding: 10px 12px; font-size: 16px; }
.formulario textarea { resize: vertical; min-height: 90px; }
.formulario input:focus, .formulario textarea:focus { outline: none; border-color: var(--boveda); }
.formulario .casilla { display: flex; gap: 10px; align-items: flex-start; color: var(--pizarra); }
.formulario .casilla input { width: 20px; min-height: 20px; height: 20px; margin-top: 1px; flex: none; accent-color: var(--boveda); }
.formulario .boton { width: 100%; }
.trampa { position: absolute !important; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.captcha:empty { display: none; }
.captcha { min-height: 65px; }
.estado { margin: 0; font-size: 15px; min-height: 1.5em; }
.estado.mal { color: var(--mal); }
.estado.bien { color: var(--ok); }
.gracias { text-align: center; padding: 28px 8px; }
.gracias h3 { font-size: 22px; margin: 0 0 8px; }
.gracias p { color: var(--gris); margin: 0; }

/* Pie */
.pie-web { padding-block: 28px calc(28px + env(safe-area-inset-bottom, 0px)); }
.pie-in { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; color: var(--gris); font-size: 14px; }
.pie-in nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.pie-in a { color: var(--gris); }
.firma { color: var(--boveda); font-weight: 500; }
.firma a { color: var(--boveda); }
.marca > span { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.marca-firma { font-family: var(--mono); font-size: 11px; font-weight: 400; color: var(--gris); letter-spacing: 0; }
@media (max-width: 420px) { .marca-firma { display: none; } }
.pie-marca { display: grid; gap: 4px; }
.pie-marca small { font-size: 12px; color: var(--gris); }
.marca b { font-weight: 650; }

/* Monedas 3D que flotan alrededor del ejemplo de cobro */
.escena { position: relative; justify-self: center; width: 100%; max-width: 400px; }
.escena .cobro { position: relative; z-index: 1; }
.flota { position: absolute; z-index: 2; width: 118px; height: auto; pointer-events: none; filter: drop-shadow(0 22px 26px rgba(0, 0, 0, .5)); animation: flota 6s ease-in-out infinite; }
.flota.f1 { top: -64px; left: -72px; width: 104px; animation-delay: -2s; }
.flota.f2 { bottom: 40px; right: -66px; width: 120px; animation-delay: -4s; }
.flota.f3 { top: -50px; right: -40px; width: 84px; z-index: 0; opacity: .95; }
@keyframes flota { 0%, 100% { translate: 0 0; rotate: 0deg; } 50% { translate: 0 -12px; rotate: -5deg; } }
@media (max-width: 880px) { .flota.f1 { top: -46px; left: -4px; width: 74px; } .flota.f2 { right: -4px; width: 82px; } .flota.f3 { top: -40px; right: 4px; width: 62px; } }
@media (prefers-reduced-motion: reduce) { .flota { animation: none; } }