/* =========================================================================
   Deacero Nom — NOM-251-SE-2025  (/conoce-la-NOM-251)
   Metodología BEM. Usa la paleta global del tema (--Orange600, --Blue600, Gray*).
   Animaciones de entrada + parallax + degradados. Mobile-first.
   Scope: .dn-page
   ========================================================================= */

.dn-page {
    --dn-orange: var(--Orange600, #FF6B00);
    --dn-orange-dark: var(--Orange700, #D05700);
    --dn-orange-soft: var(--Orange200, #FFE6E0);
    --dn-blue: var(--Blue600, #002A69);
    --dn-blue-2: #001B44;
    --dn-ink: var(--Gray900, #101828);
    --dn-body: var(--Gray700, #344054);
    --dn-muted: var(--Gray600, #475467);
    --dn-line: var(--Gray200, #EAECF0);
    --dn-line-2: var(--Gray300, #D0D5DD);
    --dn-surface: #ffffff;
    --dn-surface-1: var(--Gray50, #f9fafb);
    --dn-surface-2: var(--Gray100, #F2F4F7);
    --dn-danger: #C01926;
    --dn-radius: 14px;
    --dn-radius-sm: 9px;
    --dn-shadow: 0 .5rem 1.5rem rgba(0, 42, 105, .08);
    --dn-shadow-lg: 0 1.25rem 2.5rem rgba(0, 27, 68, .16);
    --dn-ease: cubic-bezier(.16, 1, .3, 1);

    color: var(--dn-body);
    overflow-x: hidden;
}

/* Evita scroll horizontal por elementos parallax/decorativos */
.master-column-wrapper {
    overflow-x: hidden;
}

/* =========================================================================
   Animaciones reveal on-scroll (activadas por deacero-nom.js)
   Sin JS o con prefers-reduced-motion el contenido siempre es visible.
   ========================================================================= */
.dn-anim-ready .dn-reveal {
    opacity: 0;
    transform: translateY(2rem);
    transition: opacity .7s var(--dn-ease), transform .7s var(--dn-ease);
    will-change: opacity, transform;
}

.dn-anim-ready .dn-reveal--right { transform: translateX(2.5rem); }

.dn-anim-ready .dn-reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    .dn-reveal { opacity: 1 !important; transform: none !important; }
    .dn-panel,
    .dn-stage,
    .dn-esq-panel,
    .dn-check__input,
    .dn-panel.is-active .dn-impact__item,
    .dn-stage.is-active .dn-card { animation: none !important; }
}

/* =========================================================================
   Tipografía / utilidades compartidas
   ========================================================================= */
.dn-badge {
    display: inline-block;
    padding: .4rem .9rem;
    border-radius: 8px;
    background: var(--dn-orange);
    color: #fff;
    font-weight: 700;
    font-size: .8rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin-bottom: 1.1rem;
    box-shadow: 0 .5rem 1rem rgba(255, 107, 0, .35);
}

/* =========================================================================
   HERO — imagen con parallax + degradado azul DEACERO.
   Aloja también la Introducción (tabs), así que el banner y el primer bloque
   de contenido son una sola pieza: mensaje a un lado, tarjeta al otro.
   ========================================================================= */
.dn-hero {
    --dn-nav-offset: 114px;       /* alto del header fijo del sitio (margin-top de .master-wrapper-page) */
    position: relative;
    display: flex;
    align-items: center;          /* centrado en vertical */
    min-height: calc(100vh - var(--dn-nav-offset));
    min-height: calc(100svh - var(--dn-nav-offset)); /* evita saltos con la barra del navegador móvil */
    padding-block: clamp(2.5rem, 6vw, 4.5rem);
    overflow: hidden;
    isolation: isolate;
    background: var(--dn-blue-2);
}

.dn-hero__bg {
    position: absolute;
    inset: -12% 0;
    z-index: -2;
}

.dn-hero__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 45%;
    filter: saturate(1.05);
    will-change: transform;
}

.dn-hero__overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(180deg, rgba(0, 27, 68, .35) 0%, rgba(0, 27, 68, .75) 55%, rgba(0, 20, 52, .96) 100%),
        linear-gradient(105deg, rgba(0, 42, 105, .85) 0%, rgba(0, 42, 105, .25) 60%, transparent 100%);
}

/* Contenido dentro del .container del sitio (alineado con el resto de la página).
   Móvil: una columna (mensaje arriba, tarjeta abajo) · ≥1200px: dos columnas. */
.dn-hero__content {
    position: relative;
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2rem, 5vw, 3rem);
    align-items: center;
    width: 100%;
}

.dn-hero__title {
    color: #fff;
    font-weight: 800;
    font-size: clamp(2rem, 6vw, 3.4rem);
    line-height: 1.05;
    letter-spacing: -.01em;
    text-shadow: 0 2px 24px rgba(0, 0, 0, .35);
    margin-bottom: 1.25rem;
    max-width: 18ch;
}

.dn-hero__sub {
    color: rgba(255, 255, 255, .9);
    font-size: clamp(1rem, 1.6vw, 1.15rem);
    line-height: 1.7;
    max-width: 62ch;
    margin-bottom: 0;
}

/* --- Columna de navegación: accesos directos a cada apartado del acordeón --- */
.dn-hero__nav-label {
    display: flex;
    align-items: center;
    gap: .55rem;
    color: rgba(255, 255, 255, .8);
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.dn-hero__nav-label::before {
    content: "";
    width: 30px;
    height: 26px;
    flex-shrink: 0;
    background: url("/Themes/DeaceroThemeV3/Content/images/star-deacero.svg") center / contain no-repeat;
}

.dn-hero__nav-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: .6rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.dn-hero__nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    height: 100%;
    padding: .95rem 1.15rem;
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: var(--dn-radius-sm);
    background: rgba(255, 255, 255, .07);
    backdrop-filter: blur(6px);
    text-decoration: none;
    transition: background .25s var(--dn-ease), border-color .25s var(--dn-ease),
                transform .25s var(--dn-ease), box-shadow .25s var(--dn-ease);
}

/* El tema fuerza el naranja en cualquier <a> de un Topic; declarar el color
   en los hijos gana al valor heredado sin recurrir a !important. */
.dn-hero__nav-num {
    flex-shrink: 0;
    color: var(--dn-orange);
    font-size: .85rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
}

.dn-hero__nav-text {
    flex: 1;
    color: #fff;
    font-weight: 600;
    font-size: 1.02rem;
    line-height: 1.3;
}

.dn-hero__nav-go {
    flex-shrink: 0;
    color: var(--dn-orange);
    font-size: 1.05rem;
    opacity: 0;
    transform: translateX(-.35rem);
    transition: opacity .25s var(--dn-ease), transform .25s var(--dn-ease);
}

.dn-hero__nav-link:hover,
.dn-hero__nav-link:focus-visible {
    background: rgba(255, 255, 255, .15);
    border-color: var(--dn-orange);
    transform: translateX(4px);
    box-shadow: var(--dn-shadow-lg);
}

.dn-hero__nav-link:hover .dn-hero__nav-go,
.dn-hero__nav-link:focus-visible .dn-hero__nav-go {
    opacity: 1;
    transform: none;
}

.dn-hero__nav-link:focus-visible {
    outline: 3px solid rgba(255, 255, 255, .65);
    outline-offset: 2px;
}

/* Dos columnas cuando la navegación ocupa todo el ancho; una sola cuando
   comparte fila con el mensaje. */
@media (min-width: 576px) {
    .dn-hero__nav-list { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1200px) {
    .dn-hero__content {
        grid-template-columns: 6fr 5fr;
        gap: clamp(2.5rem, 4vw, 4rem);
    }

    .dn-hero__nav-list { grid-template-columns: 1fr; }
}

/* Scroll suave solo en esta página; se anula con prefers-reduced-motion */
@media (prefers-reduced-motion: no-preference) {
    :root:has(.dn-page) { scroll-behavior: smooth; }
}

/* Compensa el header fijo del sitio al saltar a un ancla */
.dn-page .dn-acc[id],
.dn-page .dn-acc__item[id] { scroll-margin-top: clamp(80px, 12vw, 124px); }

/* =========================================================================
   ACORDEÓN — todo el contenido de la página. Entradilla + apartados plegables.
   Solo uno abierto a la vez (data-bs-parent); todos arrancan cerrados.
   ========================================================================= */
.dn-acc-heading {
    padding-block: clamp(2.75rem, 6vw, 4.5rem) clamp(1.5rem, 3vw, 2.25rem);
    background: var(--dn-surface);
    text-align: center;
}

.dn-acc-heading__title {
    color: var(--dn-blue);
    font-weight: 700;
    font-size: clamp(1.6rem, 3.4vw, 2.4rem);
    line-height: 1.15;
    margin-bottom: .75rem;
}

.dn-acc-heading__lead {
    max-width: 68ch;
    margin: 0 auto;
    font-size: clamp(1.02rem, 1.8vw, 1.2rem);
    line-height: 1.65;
    color: var(--dn-muted);
}

.dn-acc {
    background: var(--dn-surface);
    border-top: 1px solid var(--dn-line);
}

.dn-acc__item { border-bottom: 1px solid var(--dn-line); }

/* Franja a todo el ancho; el botón queda dentro del .container del sitio */
.dn-acc__headwrap {
    background: var(--dn-surface);
    transition: background .35s var(--dn-ease);
}

.dn-acc__h { margin: 0; font-size: inherit; }

.dn-acc__btn {
    display: flex;
    align-items: center;
    gap: clamp(.9rem, 2.4vw, 1.75rem);
    width: 100%;
    padding-block: clamp(1.15rem, 2.6vw, 1.9rem);
    background: none;
    border: 0;
    text-align: left;
    cursor: pointer;
}

.dn-acc__num {
    flex-shrink: 0;
    font-size: clamp(1rem, 2.2vw, 1.5rem);
    font-weight: 800;
    line-height: 1;
    font-variant-numeric: tabular-nums;
    color: var(--dn-line-2);
    transition: color .3s var(--dn-ease);
}

.dn-acc__label {
    flex: 1;
    display: grid;
    gap: .3rem;
    min-width: 0;                  /* deja que el título haga wrap en móvil */
}

.dn-acc__eyebrow {
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--dn-orange);
}

.dn-acc__title {
    color: var(--dn-blue);
    font-weight: 700;
    font-size: clamp(1.15rem, 2.6vw, 1.85rem);
    line-height: 1.2;
    transition: color .25s var(--dn-ease);
}

/* Botón +/× : el giro de 135° convierte el signo de más en una cruz */
.dn-acc__toggle {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: clamp(2.25rem, 4.5vw, 2.9rem);
    aspect-ratio: 1;
    border-radius: 50%;
    border: 2px solid var(--dn-line-2);
    color: var(--dn-orange);
    font-size: 1.05rem;
    transition: background .3s var(--dn-ease), border-color .3s var(--dn-ease),
                color .3s var(--dn-ease), transform .45s var(--dn-ease);
}

.dn-acc__btn:hover .dn-acc__num { color: var(--dn-orange); }
.dn-acc__btn:hover .dn-acc__title { color: var(--dn-orange-dark); }

.dn-acc__btn:hover .dn-acc__toggle {
    border-color: var(--dn-orange);
    background: var(--dn-orange-soft);
}

.dn-acc__btn[aria-expanded="true"] .dn-acc__num { color: var(--dn-orange); }
.dn-acc__btn[aria-expanded="true"] .dn-acc__title { color: var(--dn-orange-dark); }

.dn-acc__btn[aria-expanded="true"] .dn-acc__toggle {
    background: var(--dn-orange);
    border-color: var(--dn-orange);
    color: #fff;
    transform: rotate(135deg);
    box-shadow: 0 .4rem .9rem rgba(255, 107, 0, .32);
}

.dn-acc__btn:focus-visible {
    outline: 3px solid var(--dn-orange-soft);
    outline-offset: -3px;
    border-radius: 6px;
}

/* Tinte cálido en la franja del apartado abierto (mejora progresiva) */
.dn-acc__item:has(.dn-acc__btn[aria-expanded="true"]) .dn-acc__headwrap {
    background: linear-gradient(90deg, var(--dn-orange-soft) 0%, var(--dn-surface) 55%);
}

/* Cuerpo del apartado: hereda el fondo temático (.dn-bg-*) a todo el ancho */
.dn-acc__body { padding-block: clamp(2rem, 4.5vw, 3.5rem); }

.dn-acc__lead {
    max-width: 92ch;
    margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
    font-size: 1.075rem;
    line-height: 1.7;
    color: var(--dn-muted);
}

.dn-acc__lead--light { color: rgba(255, 255, 255, .82); }

.dn-acc__lead--center {
    margin-inline: auto;
    text-align: center;
}

@media (max-width: 575.98px) {
    .dn-acc__num { align-self: start; margin-top: .15rem; }
    .dn-acc__toggle { align-self: start; }
}

/* =========================================================================
   Fondos temáticos de los cuerpos del acordeón (.dn-acc__body).
   --star: watermark de estrella · --blue: degradado azul · --soft: gris claro.
   ========================================================================= */
.dn-bg-star {
    position: relative;
    overflow: hidden;
    background: var(--dn-surface);
}

/* Contenido por encima del watermark */
.dn-bg-star > .container {
    position: relative;
    z-index: 1;
}

/* Estrella: sangra al borde derecho, solo mitad izquierda visible, centrada en vertical */
.dn-bg-star::after {
    content: "";
    position: absolute;
    z-index: 0;
    top: 50%;
    right: 0;
    transform: translate(50%, -50%);
    width: clamp(260px, 34vw, 460px);
    height: clamp(260px, 34vw, 460px);
    background: url("/Themes/DeaceroThemeV3/Content/images/star-deacero.svg") center / contain no-repeat;
    opacity: .1;
    pointer-events: none;
}

/* =========================================================================
   TABS de introducción
   ========================================================================= */
.dn-tabs {
    background: var(--dn-surface);
    border: 1px solid var(--dn-line);
    border-radius: var(--dn-radius);
    box-shadow: var(--dn-shadow);
    overflow: hidden;
}

.dn-tabs__bar {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    padding: .85rem 1rem;
    background: var(--dn-surface-1);
    border-bottom: 1px solid var(--dn-line);
}

.dn-tab {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    padding: .6rem 1.1rem;
    border-radius: 8px;
    border: 1px solid var(--dn-line-2);
    background: var(--dn-surface);
    color: var(--dn-muted);
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    transition: color .25s var(--dn-ease), background .25s var(--dn-ease),
                border-color .25s var(--dn-ease), transform .25s var(--dn-ease);
}

.dn-tab i { font-size: 1.05rem; }

.dn-tab:hover {
    color: var(--dn-orange-dark);
    border-color: var(--dn-orange);
}

.dn-tab.is-active {
    color: #fff;
    background: var(--dn-orange);
    border-color: var(--dn-orange);
    box-shadow: 0 .4rem .9rem rgba(255, 107, 0, .3);
}

.dn-tab:focus-visible {
    outline: 3px solid var(--dn-orange-soft);
    outline-offset: 2px;
}

.dn-tabs__body {
    padding: clamp(1.25rem, 3vw, 2.25rem);
}

.dn-panel {
    animation: dn-fade-up .45s var(--dn-ease) both;
}

.dn-panel[hidden] { display: none; }

@keyframes dn-fade-up {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: none; }
}

/* Entrada escalonada de las cards de impacto al activar la pestaña */
.dn-panel.is-active .dn-impact__item {
    animation: dn-fade-up .5s var(--dn-ease) both;
}
.dn-panel.is-active .dn-impact__item:nth-child(1) { animation-delay: .06s; }
.dn-panel.is-active .dn-impact__item:nth-child(2) { animation-delay: .14s; }
.dn-panel.is-active .dn-impact__item:nth-child(3) { animation-delay: .22s; }
.dn-panel.is-active .dn-impact__item:nth-child(4) { animation-delay: .30s; }

.dn-panel__title {
    color: var(--dn-blue);
    font-weight: 700;
    font-size: 1.3rem;
    margin-bottom: .85rem;
}

.dn-panel p {
    color: var(--dn-body);
    line-height: 1.75;
    margin-bottom: .85rem;
}

.dn-panel p:last-child { margin-bottom: 0; }
.dn-panel strong { color: var(--dn-ink); }

.dn-alert {
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    padding: .9rem 1.1rem;
    border-radius: var(--dn-radius-sm);
    background: var(--dn-orange-soft);
    color: var(--dn-orange-dark) !important;
    font-size: .95rem;
    line-height: 1.6;
    margin-top: 1.1rem;
}

.dn-alert i { font-size: 1.15rem; margin-top: .1rem; flex-shrink: 0; }

.dn-alert--danger {
    background: #FDECEE;
    color: var(--dn-danger) !important;
}

.dn-alert + .dn-alert { margin-top: .6rem; }

/* --- Listas de obligaciones por actor (sección "A quién aplica") --- */
.dn-duties {
    list-style: none;
    display: grid;
    gap: .3rem;
    padding: 0;
    margin: 0;
}

.dn-duties li {
    display: flex;
    align-items: flex-start;
    gap: .7rem;
    padding: .6rem .7rem;
    border-radius: var(--dn-radius-sm);
    font-size: .95rem;
    line-height: 1.6;
    color: var(--dn-body);
    transition: background .25s var(--dn-ease);
}

.dn-duties li:hover { background: var(--dn-surface-1); }

.dn-duties li i {
    color: var(--dn-orange);
    font-size: 1.1rem;
    line-height: 1.45;
    flex-shrink: 0;
}

/* --- Grid de impacto --- */
.dn-impact {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.dn-impact__item {
    background: var(--dn-surface-1);
    border: 1px solid var(--dn-line);
    border-radius: var(--dn-radius-sm);
    padding: 1.35rem;
    transition: transform .3s var(--dn-ease), box-shadow .3s var(--dn-ease);
}

.dn-impact__item:hover {
    transform: translateY(-4px);
    box-shadow: var(--dn-shadow);
}

.dn-impact__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.9rem;
    height: 2.9rem;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--dn-orange) 0%, var(--dn-orange-dark) 100%);
    color: #fff;
    font-size: 1.35rem;
    margin-bottom: .85rem;
    box-shadow: 0 .4rem .9rem rgba(255, 107, 0, .28);
}

.dn-impact__title {
    color: var(--dn-blue);
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: .35rem;
}

.dn-impact__text {
    color: var(--dn-muted);
    font-size: .9rem;
    line-height: 1.55;
    margin-bottom: 0;
}

/* =========================================================================
   ENTRADA EN VIGOR — fondo azul con degradado
   ========================================================================= */
/* Fondo azul con degradado. Lo comparten "Entrada en vigor" e "Identificación". */
.dn-bg-blue {
    position: relative;
    overflow: hidden;
    color: #fff;
    background:
        radial-gradient(120% 80% at 85% 0%, rgba(255, 107, 0, .22) 0%, transparent 55%),
        linear-gradient(160deg, var(--dn-blue) 0%, var(--dn-blue-2) 100%);
    isolation: isolate;
}

/* Estrellitas decorativas al fondo derecho (patrón de /mineria) */
.dn-bg-blue::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: clamp(170px, 22vw, 340px);
    background: url("/Themes/DeaceroThemeV3/Content/images/soluciones/star-grid.webp") center right / contain no-repeat;
    opacity: .2;
    pointer-events: none;
    z-index: 0;
}

.dn-bg-blue > .container {
    position: relative;
    z-index: 1;
}

.dn-stages {
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: var(--dn-radius);
    padding: clamp(1.25rem, 3vw, 2rem);
    backdrop-filter: blur(6px);
    box-shadow: var(--dn-shadow-lg);
}

.dn-stages__selector {
    position: relative;
    display: flex;
    gap: .5rem;
    background: rgba(0, 0, 0, .22);
    border-radius: 10px;
    padding: .35rem;
    margin-bottom: 1.5rem;
}

.dn-stage-btn {
    position: relative;
    z-index: 1;
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: .1rem .5rem;
    padding: .7rem 1rem;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: rgba(255, 255, 255, .7);
    font-size: .95rem;
    font-weight: 700;
    cursor: pointer;
    transition: color .3s var(--dn-ease);
}

.dn-stage-btn__date {
    font-size: .8rem;
    font-weight: 500;
    opacity: .8;
}

.dn-stage-btn.is-active { color: var(--dn-blue); }
.dn-stage-btn.is-active .dn-stage-btn__date { opacity: 1; color: var(--dn-orange-dark); }

.dn-stage-btn:focus-visible {
    outline: 3px solid rgba(255, 255, 255, .6);
    outline-offset: 2px;
}

/* Píldora deslizante que marca la etapa activa */
.dn-stages__indicator {
    position: absolute;
    top: .35rem;
    bottom: .35rem;
    left: .35rem;
    width: calc(50% - .35rem);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 .3rem .8rem rgba(0, 0, 0, .25);
    transition: transform .4s var(--dn-ease);
}

.dn-stages__selector[data-active="1"] .dn-stages__indicator { transform: translateX(0); }
.dn-stages__selector[data-active="2"] .dn-stages__indicator { transform: translateX(calc(100% + .5rem)); }

.dn-stage { animation: dn-fade-up .45s var(--dn-ease) both; }
.dn-stage[hidden] { display: none; }

.dn-stage__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .75rem;
    margin-bottom: .75rem;
}

.dn-stage__tag {
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    padding: .25rem .7rem;
    border-radius: 999px;
    background: var(--dn-orange);
    color: #fff;
}

.dn-stage__date {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    font-size: .9rem;
    color: rgba(255, 255, 255, .8);
}

.dn-stage__date strong { color: #fff; }

.dn-stage__lead {
    font-size: 1.05rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 1.1rem;
}

/* Tarjetas de familia de producto. Las que existen en el catálogo llevan foto
   y enlazan a su ficha; el resto conserva el check y no es enlazable. */
.dn-cards {
    list-style: none;
    display: grid;
    /* min() evita que la pista de 300px desborde en pantallas más estrechas */
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
    gap: .65rem;
    padding: 0;
    margin: 0;
}

.dn-card {
    display: flex;
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: var(--dn-radius-sm);
    overflow: hidden;
    transition: background .25s var(--dn-ease), border-color .25s var(--dn-ease), transform .25s var(--dn-ease);
}

.dn-card__link,
.dn-card--plain {
    display: flex;
    align-items: center;
    gap: .8rem;
    width: 100%;
    padding: .5rem .9rem;
    color: #fff;
    text-decoration: none;
}

/* La foto llega hasta el borde de su caja, así que necesita menos padding
   que el icono. Enlace o no, --photo va en el <li>. */
.dn-card--photo .dn-card__link,
.dn-card--photo.dn-card--plain { padding-left: .5rem; }

.dn-card__img {
    width: 56px;
    height: 56px;
    flex-shrink: 0;
    object-fit: cover;
    border-radius: 7px;
    background: #fff;
}

.dn-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    flex-shrink: 0;
    margin-block: .75rem;
}

.dn-card__icon i {
    color: #6FE39A;
    font-size: 1.15rem;
}

/* El tema fuerza `a:not(header a):not(footer a) { color: Orange600 !important }`.
   El nombre es un <span>, así que declarar su color gana al valor heredado
   del enlace sin necesidad de !important. */
.dn-card__name {
    flex: 1;
    color: #fff;
    font-size: .9rem;
    line-height: 1.4;
}

.dn-card__go {
    flex-shrink: 0;
    color: var(--dn-orange);
    font-size: 1.05rem;
    opacity: 0;
    transform: translateX(-.35rem);
    transition: opacity .25s var(--dn-ease), transform .25s var(--dn-ease);
}

/* El enlace ocupa toda la tarjeta, así que su fondo basta para el hover.
   El desplazamiento vertical es mejora progresiva vía :has(). */
.dn-card__link:hover { background: rgba(255, 255, 255, .16); }

.dn-card:has(.dn-card__link):hover {
    border-color: rgba(255, 255, 255, .3);
    transform: translateY(-2px);
}

.dn-card__link:hover .dn-card__go,
.dn-card__link:focus-visible .dn-card__go {
    opacity: 1;
    transform: none;
}

.dn-card__link:focus-visible {
    outline: 3px solid rgba(255, 255, 255, .7);
    outline-offset: -3px;
    border-radius: var(--dn-radius-sm);
}

/* Entrada escalonada de las tarjetas al activar la etapa */
.dn-stage.is-active .dn-card {
    animation: dn-fade-up .45s var(--dn-ease) both;
}
.dn-stage.is-active .dn-card:nth-child(1) { animation-delay: .05s; }
.dn-stage.is-active .dn-card:nth-child(2) { animation-delay: .11s; }
.dn-stage.is-active .dn-card:nth-child(3) { animation-delay: .17s; }
.dn-stage.is-active .dn-card:nth-child(4) { animation-delay: .23s; }
.dn-stage.is-active .dn-card:nth-child(5) { animation-delay: .29s; }

/* Nota al pie sobre la Tabla 1 de la Norma */
.dn-note {
    display: flex;
    align-items: flex-start;
    gap: .5rem;
    margin: 1.25rem 0 0;
    font-size: .85rem;
    font-style: italic;
    line-height: 1.6;
    color: rgba(255, 255, 255, .72);
}

.dn-note i { font-size: 1rem; margin-top: .15rem; flex-shrink: 0; }

/* =========================================================================
   CERTIFICACIÓN — timeline vertical de 8 pasos (Bootstrap collapse anidado)
   ========================================================================= */
.dn-bg-soft { background: var(--dn-surface-1); }

.dn-timeline {
    counter-reset: dn-step;
    list-style: none;
    padding: 0;
    margin: 0;
}

.dn-step {
    counter-increment: dn-step;
    position: relative;
    padding-left: 3.4rem;
}

/* Riel vertical que une los pasos: arranca bajo este punto y termina sobre el
   siguiente (de ahí el bottom negativo, igual al offset superior del punto). */
.dn-step:not(:last-child)::before {
    content: "";
    position: absolute;
    left: 1.05rem;
    top: 3.05rem;
    bottom: -.95rem;
    width: 2px;
    transform: translateX(-50%);
    background: var(--dn-line-2);
}

.dn-step__h { margin: 0; font-size: inherit; }

.dn-step__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    padding: 1rem 0;
    background: none;
    border: 0;
    text-align: left;
    cursor: pointer;
}

.dn-step__dot {
    position: absolute;
    left: 0;
    top: .95rem;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.1rem;
    height: 2.1rem;
    border-radius: 50%;
    background: var(--dn-surface);
    border: 2px solid var(--dn-line-2);
    color: var(--dn-muted);
    font-size: .85rem;
    font-weight: 700;
    transition: background .3s var(--dn-ease), border-color .3s var(--dn-ease), color .3s var(--dn-ease);
}

.dn-step__dot::before { content: counter(dn-step); }

.dn-step__head[aria-expanded="true"] .dn-step__dot {
    background: var(--dn-orange);
    border-color: var(--dn-orange);
    color: #fff;
}

.dn-step__title {
    display: flex;
    align-items: center;
    gap: .55rem;
    color: var(--dn-blue);
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.4;
    transition: color .25s var(--dn-ease);
}

.dn-step__title i {
    color: var(--dn-orange);
    font-size: 1.15rem;
    flex-shrink: 0;
}

.dn-step__head:hover .dn-step__title { color: var(--dn-orange-dark); }

.dn-step__chev {
    flex-shrink: 0;
    color: var(--dn-orange);
    font-size: 1.15rem;
    transition: transform .35s var(--dn-ease);
}

.dn-step__head[aria-expanded="true"] .dn-step__chev { transform: rotate(180deg); }

.dn-step__head:focus-visible {
    outline: 3px solid var(--dn-orange-soft);
    outline-offset: 3px;
    border-radius: 4px;
}

.dn-step__body {
    background: var(--dn-surface);
    border: 1px solid var(--dn-line);
    border-radius: var(--dn-radius);
    padding: clamp(1rem, 2.5vw, 1.5rem);
    margin-bottom: 1rem;
}

.dn-step__body p {
    color: var(--dn-body);
    line-height: 1.7;
    margin-bottom: .85rem;
}

.dn-step__body p:last-child { margin-bottom: 0; }

.dn-step__body p.dn-step__hint {
    font-size: .85rem;
    color: var(--dn-muted);
    margin-bottom: .6rem;
}

/* Badge de plazos legales (7 días hábiles, 90 días naturales, etc.) */
.dn-pill {
    display: flex;
    align-items: flex-start;
    gap: .55rem;
    width: fit-content;
    max-width: 100%;
    padding: .6rem .9rem;
    border-radius: var(--dn-radius-sm);
    background: var(--dn-orange-soft);
    color: var(--dn-orange-dark);
    font-size: .875rem;
    font-weight: 600;
    line-height: 1.5;
}

.dn-pill i { font-size: 1.05rem; margin-top: .05rem; flex-shrink: 0; }

.dn-callout {
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    padding: .8rem 1rem;
    border-radius: var(--dn-radius-sm);
    background: var(--dn-surface-1);
    border: 1px solid var(--dn-line);
    font-size: .9rem;
    line-height: 1.6;
}

.dn-callout i { color: var(--dn-orange); font-size: 1.05rem; margin-top: .15rem; flex-shrink: 0; }

/* Listas dentro de los pasos */
.dn-ticks {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: .55rem;
    padding: 0;
    margin: 0;
}

.dn-ticks li,
.dn-rows li {
    display: flex;
    align-items: center;
    gap: .6rem;
    color: var(--dn-body);
    line-height: 1.5;
}

.dn-ticks li { font-size: .9rem; }

.dn-ticks li i,
.dn-rows li i {
    color: var(--dn-orange);
    font-size: 1.05rem;
    flex-shrink: 0;
}

.dn-rows {
    list-style: none;
    padding: 0;
    margin: 0;
}

.dn-rows li {
    padding: .7rem 0;
    border-bottom: 1px solid var(--dn-line);
    font-size: .92rem;
}

.dn-rows li:last-child { border-bottom: 0; padding-bottom: 0; }

/* --- Sub-pestañas de esquemas de certificación (paso 2) --- */
.dn-esquemas { margin-top: 1rem; }

.dn-esquemas__bar {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin-bottom: .9rem;
}

.dn-esq-btn {
    flex: 1 1 120px;
    padding: .55rem .9rem;
    border-radius: 8px;
    border: 1px solid var(--dn-line-2);
    background: var(--dn-surface);
    color: var(--dn-muted);
    font-size: .875rem;
    font-weight: 600;
    cursor: pointer;
    transition: color .25s var(--dn-ease), background .25s var(--dn-ease), border-color .25s var(--dn-ease);
}

.dn-esq-btn:hover {
    color: var(--dn-orange-dark);
    border-color: var(--dn-orange);
}

.dn-esq-btn.is-active {
    background: var(--dn-orange);
    border-color: var(--dn-orange);
    color: #fff;
}

.dn-esq-btn:focus-visible {
    outline: 3px solid var(--dn-orange-soft);
    outline-offset: 2px;
}

.dn-esq-panel {
    background: var(--dn-surface-1);
    border: 1px solid var(--dn-line);
    border-radius: var(--dn-radius-sm);
    padding: 1rem 1.1rem;
    animation: dn-fade-up .35s var(--dn-ease) both;
}

.dn-esq-panel[hidden] { display: none; }

.dn-esq-panel__title {
    color: var(--dn-blue);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: .2rem;
}

.dn-esq-panel p {
    font-size: .9rem;
    line-height: 1.6;
    margin-bottom: .4rem;
}

.dn-esq-panel p:last-child { margin-bottom: 0; }

.dn-esq-panel p.dn-esq-panel__vigencia {
    color: var(--dn-orange-dark);
    font-weight: 600;
    font-size: .85rem;
    margin-bottom: .7rem;
}

/* =========================================================================
   IDENTIFICACIÓN — checklist con checkbox nativo estilizado
   ========================================================================= */
/* Tarjeta de vidrio sobre el fondo azul, igual que .dn-stages */
.dn-check-card {
    max-width: 780px;
    margin-inline: auto;
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: var(--dn-radius);
    backdrop-filter: blur(6px);
    box-shadow: var(--dn-shadow-lg);
    padding: clamp(1rem, 2.5vw, 1.75rem);
}

.dn-check {
    list-style: none;
    padding: 0;
    margin: 0;
}

.dn-check__item {
    display: flex;
    align-items: flex-start;
    gap: .85rem;
    padding: .9rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, .14);
}

.dn-check__item:last-child { border-bottom: 0; padding-bottom: 0; }

.dn-check__input {
    appearance: none;
    -webkit-appearance: none;
    display: grid;
    place-content: center;
    width: 1.25rem;
    height: 1.25rem;
    margin: .2rem 0 0;
    flex-shrink: 0;
    border: 2px solid rgba(255, 255, 255, .45);
    border-radius: 5px;
    background: transparent;
    cursor: pointer;
    transition: background .2s var(--dn-ease), border-color .2s var(--dn-ease);
}

.dn-check__input::before {
    content: "";
    width: .65rem;
    height: .65rem;
    transform: scale(0);
    transition: transform .15s var(--dn-ease);
    box-shadow: inset 1rem 1rem #fff;
    clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0, 43% 62%);
}

.dn-check__input:checked {
    background: var(--dn-orange);
    border-color: var(--dn-orange);
}

.dn-check__input:checked::before { transform: scale(1); }

.dn-check__input:focus-visible {
    outline: 3px solid rgba(255, 255, 255, .6);
    outline-offset: 2px;
}

.dn-check__label {
    font-size: .95rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, .9);
    cursor: pointer;
}

/* Pulso al marcarse solo. El trazo del check ya tiene su propia transición;
   esto solo da el golpe de vista al recorrer la lista. */
@keyframes dn-check-pop {
    50% { transform: scale(1.2); }
}

.dn-check__input.is-autochecked { animation: dn-check-pop .32s var(--dn-ease); }

/* =========================================================================
   REFERENCIAS TÉCNICAS — tarjetas de consulta
   ========================================================================= */
.dn-refs {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(1rem, 2vw, 1.5rem);
}

.dn-ref {
    padding: clamp(1.25rem, 2.5vw, 1.75rem);
    background: var(--dn-surface);
    border: 1px solid var(--dn-line);
    border-radius: var(--dn-radius);
    box-shadow: var(--dn-shadow);
}

.dn-ref__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    margin-bottom: .9rem;
    border-radius: var(--dn-radius-sm);
    background: var(--dn-orange-soft);
    color: var(--dn-orange-dark);
    font-size: 1.35rem;
}

.dn-ref__title {
    color: var(--dn-blue);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: .55rem;
}

.dn-ref__text {
    font-size: .975rem;
    line-height: 1.65;
    margin-bottom: .75rem;
}

.dn-ref__meta {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    font-size: .85rem;
    font-style: italic;
    color: var(--dn-muted);
    margin-bottom: 0;
}

.dn-ref__glossary {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: .4rem .9rem;
    margin-bottom: 0;
    font-size: .95rem;
}

.dn-ref__glossary dt {
    color: var(--dn-blue);
    font-weight: 700;
}

.dn-ref__glossary dd {
    margin-bottom: 0;
    line-height: 1.5;
}

@media (min-width: 768px) {
    .dn-refs { grid-template-columns: repeat(2, 1fr); }
}

/* =========================================================================
   Responsive
   ========================================================================= */
@media (max-width: 575.98px) {
    .dn-tab span { font-size: .82rem; }
    .dn-tabs__bar { gap: .4rem; padding: .7rem; }
    .dn-tab { padding: .5rem .8rem; }
    .dn-stages__selector { flex-direction: column; }
    .dn-stages__selector .dn-stages__indicator { display: none; }
    .dn-stage-btn.is-active { background: #fff; }

    .dn-step { padding-left: 2.6rem; }
    .dn-step:not(:last-child)::before { left: .85rem; top: 2.55rem; bottom: -.85rem; }
    .dn-step__dot { top: .85rem; width: 1.7rem; height: 1.7rem; font-size: .75rem; }
    .dn-step__title { font-size: .95rem; }
    .dn-esq-btn { flex-basis: 100%; }
}