/* Layout global: contenedor, barra superior, header, navegación, secciones, footer. Mobile-first. */

.container {
    width: 100%;
    max-width: calc(var(--container) + var(--gutter) * 2);
    margin-inline: auto;
    padding-inline: var(--gutter);
}
.container--narrow { max-width: calc(var(--container-narrow) + var(--gutter) * 2); }

/* Barra superior */
.topbar {
    background: var(--c-ink);
    color: var(--c-on-dark);
    font-size: var(--fs-xs);
}
.topbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--s-4);
    min-height: 2.5rem;
}
.topbar__msg { display: none; color: var(--c-on-dark-muted); }
.topbar__links { display: flex; gap: var(--s-5); margin-left: auto; flex-wrap: wrap; }
.topbar__links a {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    text-decoration: none;
    min-height: 2.5rem;
}
.topbar__links a:hover { text-decoration: underline; }
.topbar__links .i { width: 1rem; height: 1rem; }
.topbar__links a:nth-child(2) span {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    isolation: isolate;
    transition: transform var(--d-base) var(--ease), box-shadow var(--d-base) var(--ease);
}
.site-header::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid transparent;
    -webkit-backdrop-filter: saturate(1.4) blur(14px);
    backdrop-filter: saturate(1.4) blur(14px);
    transition: border-color var(--d-base), background var(--d-base);
}
.site-header.is-scrolled::before { border-bottom-color: var(--c-line); background: rgba(255, 255, 255, 0.96); }
.site-header.is-scrolled { box-shadow: 0 6px 24px rgba(47, 54, 63, 0.07); }
.site-header.is-hidden { transform: translateY(-110%); }

.site-header__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas: "brand actions" "search search";
    align-items: center;
    gap: var(--s-2) var(--s-3);
    padding-block: var(--s-3);
}

.brand { grid-area: brand; display: inline-flex; align-items: center; text-decoration: none; justify-self: start; min-height: 2.75rem; }
.brand img { height: 2.5rem; width: auto; }
.brand__word {
    display: inline-flex;
    align-items: baseline;
    gap: 0.4em;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.375rem;
    letter-spacing: 0.02em;
    color: var(--c-ink);
}
.brand__word small {
    font-size: 0.5em;
    font-weight: 700;
    letter-spacing: 0.18em;
    padding: 0.2em 0.55em;
    background: var(--c-green);
    color: var(--c-ink);
    border-radius: 4px;
    transform: translateY(-0.15em);
}
.brand__word--light { color: var(--c-on-dark); }

.header-actions { grid-area: actions; display: flex; align-items: center; gap: var(--s-1); }

/* Navegación (móvil: panel a pantalla completa) */
.main-nav {
    position: fixed;
    inset: 0;
    z-index: var(--z-nav);
    display: flex;
    flex-direction: column;
    gap: var(--s-5);
    padding: 7rem var(--gutter) var(--s-6);
    overflow-y: auto;
    background: var(--c-white);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.75rem);
    transition: opacity var(--d-base) var(--ease), transform var(--d-base) var(--ease), visibility 0s linear var(--d-base);
}
.main-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition-delay: 0s;
}
.main-nav__list { display: flex; flex-direction: column; list-style: none; }
.main-nav__list > li > a,
.main-nav__trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 3.25rem;
    padding-block: var(--s-2);
    font-family: var(--font-display);
    font-size: var(--fs-lg);
    font-weight: 650;
    text-decoration: none;
    border-bottom: 1px solid var(--c-line);
}
.main-nav__list a[aria-current="page"] { color: var(--c-deep); }
.main-nav__trigger .i { transition: transform var(--d-base) var(--ease); }
.main-nav__trigger[aria-expanded="true"] .i { transform: rotate(180deg); }
.main-nav__cta { align-self: flex-start; }

.cats-menu { list-style: none; display: grid; gap: var(--s-1); padding: var(--s-3) 0; }
.cats-menu a {
    display: flex;
    gap: var(--s-3);
    align-items: center;
    padding: var(--s-2) var(--s-2);
    border-radius: var(--r-md);
    text-decoration: none;
}
.cats-menu a:hover { background: var(--c-gray); }
.cats-menu .i { width: 1.5rem; height: 1.5rem; color: var(--c-deep); flex: none; }
.cats-menu span { display: grid; line-height: 1.3; }
.cats-menu small { color: var(--c-muted); font-size: var(--fs-xs); }

.menu-toggle { position: relative; z-index: calc(var(--z-nav) + 1); }

/* Buscador */
.search {
    grid-area: search;
    position: relative;
    display: flex;
    align-items: center;
    min-width: 0;
}
.search > .i { position: absolute; left: 0.9rem; width: 1.25rem; height: 1.25rem; color: var(--c-muted); pointer-events: none; }
.search input {
    width: 100%;
    min-height: 2.75rem;
    padding: 0.5rem 1rem 0.5rem 2.75rem;
    border: 1px solid var(--c-line-strong);
    border-radius: var(--r-pill);
    background: var(--c-gray);
    transition: border-color var(--d-fast), background var(--d-fast), box-shadow var(--d-fast);
}
.search input::placeholder { color: var(--c-muted); }
.search input:focus { outline: none; border-color: var(--c-deep); background: var(--c-white); box-shadow: var(--sh-focus); }
.search__list {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    z-index: 5;
    list-style: none;
    max-height: min(26rem, 70vh);
    overflow-y: auto;
    padding: var(--s-2);
    background: var(--c-white);
    border: 1px solid var(--c-line);
    border-radius: var(--r-md);
    box-shadow: var(--sh-2);
}
.search__item {
    display: grid;
    grid-template-columns: 3.5rem 1fr;
    align-items: center;
    gap: var(--s-3);
    padding: var(--s-2);
    border-radius: var(--r-sm);
    cursor: pointer;
    text-decoration: none;
}
.search__item img { width: 3.5rem; height: 2.625rem; object-fit: contain; background: var(--c-gray); border-radius: 6px; }
.search__item strong { display: block; font-size: var(--fs-sm); line-height: 1.3; }
.search__item small { color: var(--c-muted); font-size: var(--fs-xs); }
.search__item[aria-selected="true"], .search__item:hover { background: var(--c-gray); outline: 2px solid var(--c-deep); outline-offset: -2px; }
.search__empty, .search__all { padding: var(--s-3); font-size: var(--fs-sm); color: var(--c-muted); }
.search__all a { color: var(--c-deep); font-weight: 700; }

/* Secciones */
.section { padding-block: var(--section-y); }
.section--soft { background: var(--c-gray); }
.section--tight { padding-block: var(--s-7); }
.section__head { margin-bottom: var(--s-6); max-width: 44rem; }
.section__head h2 { font-size: var(--fs-xl); font-weight: 750; }
.section__head p { margin-top: var(--s-3); color: var(--c-muted); font-size: var(--fs-md); }
.section__head--split { max-width: none; display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: var(--s-4); }

.page-head { padding-block: var(--s-5) var(--s-6); max-width: 44rem; }
.page-head h1 { font-size: var(--fs-2xl); font-weight: 750; }
.page-head p { margin-top: var(--s-3); color: var(--c-muted); font-size: var(--fs-md); }

.breadcrumbs { padding-top: var(--s-4); font-size: var(--fs-sm); color: var(--c-muted); }
.breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: var(--s-1) var(--s-2); }
.breadcrumbs li + li::before { content: "/"; margin-right: var(--s-2); color: var(--c-line-strong); }
.breadcrumbs a { color: var(--c-muted); }
.breadcrumbs a:hover { color: var(--c-deep); }
.breadcrumbs [aria-current] { color: var(--c-ink); font-weight: 600; }

/* Footer */
.site-footer { background: var(--c-ink); color: var(--c-on-dark-muted); margin-top: var(--section-y); }
.site-footer__grid { display: grid; gap: var(--s-6); padding-block: var(--s-7); }
.site-footer__brand p:not(.brand__word) { margin-top: var(--s-3); max-width: 24rem; }
.footer-title { font-size: var(--fs-base); font-weight: 700; color: var(--c-on-dark); margin-bottom: var(--s-3); letter-spacing: 0; }
.site-footer ul { list-style: none; display: grid; gap: var(--s-2); }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--c-green); text-decoration: underline; }
.site-footer :focus-visible { outline-color: var(--c-green); }
.site-footer__legal {
    display: flex;
    flex-direction: column;
    gap: var(--s-3);
    padding-block: var(--s-5);
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    font-size: var(--fs-sm);
}
.site-footer__legal ul { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5); }

/* Riel de secciones (solo escritorio ancho, lo crea JS) */
.rail {
    position: fixed;
    left: clamp(0.5rem, 1.2vw, 1.5rem);
    top: 50%;
    z-index: 20;
    display: none;
    transform: translateY(-50%);
}
.rail ol { list-style: none; display: grid; gap: 0.25rem; position: relative; padding-left: 0; }
.rail ol::before { content: ""; position: absolute; left: 0.6875rem; top: 0.75rem; bottom: 0.75rem; width: 2px; background: var(--c-line); }
.rail__fill { position: absolute; left: 0.6875rem; top: 0.75rem; width: 2px; height: calc(100% - 1.5rem); background: var(--c-green); transform-origin: top; transform: scaleY(0); }
.rail a {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--s-2);
    min-height: 1.5rem;
    min-width: 1.5rem;
    text-decoration: none;
}
.rail__dot { width: 0.75rem; height: 0.75rem; margin-left: 0.3125rem; border-radius: 50%; background: var(--c-white); border: 2px solid var(--c-line-strong); transition: background var(--d-base), border-color var(--d-base), transform var(--d-base) var(--ease); position: relative; z-index: 1; }
.rail__label { position: absolute; left: 1.75rem; padding: 0.2rem 0.6rem; font-size: var(--fs-xs); font-weight: 700; white-space: nowrap; background: var(--c-ink); color: var(--c-white); border-radius: var(--r-pill); opacity: 0; transform: translateX(-4px); pointer-events: none; transition: opacity var(--d-fast), transform var(--d-fast); }
.rail a:hover .rail__label, .rail a:focus-visible .rail__label { opacity: 1; transform: none; }
.rail a[aria-current="true"] .rail__dot { background: var(--c-deep); border-color: var(--c-deep); transform: scale(1.25); }
.rail.on-dark .rail__dot { background: var(--c-ink); }