/* =======================================================
   VIEWER - SPLIT LAYOUT (CORREGIDO Y OPTIMIZADO)
   ======================================================= */

/* ---------- Variables Globales ---------- */
:root {
    --viewer-bg: #ffffff;
    --viewer-bg-alt: #f5f5f5;
    --viewer-text: #000000;
    --viewer-text-muted: rgba(0, 0, 0, 0.4);
    --viewer-border: rgba(0, 0, 0, 0.1);
    --viewer-ease: cubic-bezier(0.22, 1, 0.36, 1);
    --viewer-ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Contenedor principal ---------- */
.viewer {
    position: fixed;
    inset: 0;
    background: var(--viewer-bg);
    z-index: 99999;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    contain: layout style;
}
.viewer:not(.hidden) { opacity: 1; visibility: visible; }
.viewer.hidden { pointer-events: none; }

/* ---------- Layout grid ---------- */
.viewer-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    width: 100%;
    height: 100vh;
}

/* ---------- Panel izquierdo (imagen) ---------- */
.viewer-left {
    position: relative;
    height: 100vh;
    background: var(--viewer-bg-alt);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.viewer-left::after {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 1px; height: 100%;
    background: rgba(0, 0, 0, 0.08);
}

.viewer-left img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: opacity 0.4s var(--viewer-ease-soft), 
                filter 0.6s var(--viewer-ease-soft), 
                transform 0.6s var(--viewer-ease-soft);
}

.viewer-left img.is-blurred,
.viewer-left img.is-fading,
.viewer-left img.is-transitioning { will-change: filter, transform, opacity; }

.viewer-left img.is-blurred { filter: blur(25px) brightness(0.95); transform: scale(1.08); }
.viewer-left img.is-fading { opacity: 0.3; }
.viewer-left img.is-transitioning { opacity: 0; transform: scale(0.97); }

/* ---------- Skeleton + Loader ---------- */
.viewer-skeleton {
    position: absolute; inset: 0;
    background: linear-gradient(90deg, #ececec 0%, #f5f5f5 50%, #ececec 100%);
    background-size: 200% 100%;
    opacity: 0; pointer-events: none; z-index: 1;
    transition: opacity 0.3s ease;
}
.viewer-skeleton.is-visible { opacity: 1; animation: shimmer 1.4s ease-in-out infinite; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ---------- Panel derecho (info + nav) ---------- */
.viewer-right {
    position: relative;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 4rem 5rem;
    background: var(--viewer-bg);
    color: var(--viewer-text);
}

.viewer-info { text-align: left; max-width: calc(100% - 40px); }
.viewer-counter {
    display: flex; align-items: baseline; gap: 0.4rem;
    margin-bottom: 2rem;
}
#viewer-counter { font-size: 2.8rem; font-weight: 200; line-height: 1; letter-spacing: -0.02em; letter-spacing: 0.1em; }
.viewer-counter-sep { color: var(--viewer-text-muted); margin: 0 0.3rem; font-size: 1rem; font-weight: 500; }
#viewer-total { font-size: 1rem; font-weight: 500; color: var(--viewer-text-muted); }

#viewer-project-name {
    font-family: var(--font-titles, sans-serif);
    font-size: 2.3rem; font-weight: 400; line-height: 1.2;
    letter-spacing: -0.02em; text-transform: capitalize;
    margin-bottom: 1rem;
}

.viewer-scroll-hint {
    display: flex; align-items: center; gap: 0.75rem;
    margin-top: 2rem; font-size: 0.8rem;
    color: var(--viewer-text-muted); letter-spacing: 0.2em; text-transform: uppercase;
}
.viewer-scroll-hint::before { content: ''; width: 30px; height: 1px; background: rgba(0,0,0,0.3); }

/* Nav stack */
.viewer-nav-stack { display: flex; flex-direction: column; gap: 1rem; align-items: stretch; }
.viewer-nav {
    display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
    padding: 1.25rem 0; background: none; border: none;
    cursor: pointer; color: var(--viewer-text);
    font-family: inherit; text-align: left;
    transition: all 0.4s var(--viewer-ease);
}
.viewer-nav:first-child { border-top: 1px solid var(--viewer-border); }
.viewer-nav:last-of-type { border-bottom: 1px solid var(--viewer-border); }
.viewer-nav:hover { padding-left: 0.5rem; padding-right: 0.5rem; }
.viewer-nav:hover .nav-arrow { background: #000; color: #fff; transform: translateY(0); }

.nav-label { font-size: 0.85rem; font-weight: 500; letter-spacing: 0.15em; text-transform: uppercase; }
.nav-arrow {
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
    width: 52px; height: 52px;
    border: 1px solid var(--viewer-border); border-radius: 50%;
    transition: all 0.4s var(--viewer-ease);
}
.viewer-prev:hover .nav-arrow svg { transform: translateY(-2px); }
.viewer-next:hover .nav-arrow svg { transform: translateY(2px); }

/* Progress bar */
.viewer-progress { width: 100%; height: 2px; margin: 0.5rem 0; background: rgba(0,0,0,0.08); overflow: hidden; }
.viewer-progress-bar { height: 100%; width: 10%; background: #000; transition: width 0.5s var(--viewer-ease); }

/* Botón cerrar */
.viewer-close {
    position: fixed; top: 2.5rem; right: 2rem;
    width: 48px; height: 48px;
    display: flex; align-items: center; justify-content: center;
    background: none; border: none; color: var(--viewer-text);
    cursor: pointer; z-index: 10;
    transition: transform 0.4s ease;
}
.viewer-close:hover { transform: rotate(90deg); }

/* ========================================
   Descripcion de Cada Imagen
   ======================================== */
.viewer-image-info {opacity: 1;}

.viewer-info-header {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    width: fit-content;
    cursor: pointer;
    list-style: none;
}
.viewer-info-header::marker,
.viewer-info-header::-webkit-details-marker {
    display: none;
}
.viewer-info-header::before {
    content: "";
    width: 8px;
    height: 8px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(-45deg);
    transition: transform 0.25s ease;
    flex-shrink: 0;
}
.viewer-image-info[open] .viewer-info-header::before {
    transform: rotate(45deg) translateY(-5px);
}
.viewer-image-title {
    display: inline-block;
    margin: 0;
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.2;
    text-transform: lowercase; /* 1. Primero todo a minúsculas */
}
.viewer-image-title::first-letter {
    text-transform: uppercase; /* 2. Solo la primera letra a mayúscula */
}
.viewer-image-desc-wrapper { margin-top: 0.75rem; }
.viewer-image-desc { margin: 0;}

/* Cuando NO hay descripción completa */
.viewer-image-info.no-expandable .viewer-info-header {
    cursor: default; /* Quitar cursor pointer */
    pointer-events: none; /* Desactivar clicks */
}

.viewer-image-info.no-expandable .viewer-info-header::before {
    display: none; /* Ocultar la flechita */
}


/* ========================================
Crédito de Colaboración
======================================== */
.viewer-colaboracion {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--viewer-text-muted);
    margin: -0.5rem 0 1.5rem 0;
    font-style: italic;
    letter-spacing: 0.01em;
    line-height: 1.4;
    opacity: 0.85;
    transition: opacity 0.3s ease;
}

.viewer-colaboracion::before {
    content: "— ";
    opacity: 0.6;
}


/* ========================================
   MOBILE - SOLUCIÓN DEFINITIVA
   ======================================== */
@media (max-width: 700px) {
    /* Permitir que el contenido se vea completo */
    .viewer {
        overflow: auto !important;
        -webkit-overflow-scrolling: touch;
    }

    .viewer-layout {
        display: flex !important;
        flex-direction: column !important;
        grid-template-columns: unset !important;
        min-height: 100vh !important;
        background: #fff !important;
    }

    /* IMAGEN: altura máxima calculada */
    .viewer-left {
        flex: 1 1 auto !important;
        height: auto !important;
        min-height: 0 !important;
        max-height: 70vh !important; /* 🚨 CLAVE: limita la altura de la imagen */
        background: #fff !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 2rem !important;
        overflow: hidden !important;
    }

    .viewer-left::after { display: none !important; }

    .viewer-left img {
        width: 100% !important;
        height: auto !important;
        max-width: 100% !important;
        max-height: 100% !important;
        object-fit: contain !important;
    }

    /* TEXTO: justo debajo */
    .viewer-right {
        position: relative !important;
        flex: 0 0 auto !important;
        height: auto !important;
        display: flex !important;
        flex-direction: row !important;
        align-items: flex-start !important;
        justify-content: space-between !important;
        padding: 0.5rem 1.5rem 1rem 1.5rem !important;
        background: #fff !important;
        color: var(--viewer-text) !important;
        z-index: 10 !important;
    }

    .viewer-info {
        position: relative !important;
        display: flex !important;
        flex-direction: column !important;
        align-items: flex-start !important;
        text-align: left !important;
        max-width: calc(100% - 100px) !important;
        padding-right: 10px !important;
    }

    .viewer-nav-stack {
        position: relative !important;
        flex: 0 0 auto !important;
        flex-direction: column !important;
        justify-content: flex-start !important;
        align-items: center !important;
        gap: 0.5rem !important;
        margin-left: 1rem !important;
    }

    .viewer-layout .viewer-counter,
    .viewer-layout #viewer-project-name {
        color: var(--viewer-text) !important;
        text-shadow: none !important;
    }
    .viewer-counter-sep { color: var(--viewer-text-muted) !important; }
    #viewer-total { color: var(--viewer-text-muted) !important; }
    #viewer-counter { font-size: 1.75rem !important; }
    .viewer-layout #viewer-project-name {
        font-size: 1.5rem !important;
        margin-bottom: 0.5rem !important;
    }

    .viewer-layout .viewer-progress {
        background: rgba(0, 0, 0, 0.08) !important;
        margin: 0.5rem 0 !important;
    }
    .viewer-layout .viewer-progress-bar { background: #000 !important; }
    .viewer-layout .viewer-scroll-hint { display: none !important; }
    .viewer-layout .viewer-nav { border: none !important; padding: 0 !important; }
    .viewer-layout .nav-label { display: none !important; }

    .viewer-layout .nav-arrow {
        width: 44px !important;
        height: 44px !important;
        border: 1px solid var(--viewer-border) !important;
        background: transparent !important;
        color: var(--viewer-text) !important;
        backdrop-filter: none !important;
    }
    .viewer-layout .nav-arrow svg { stroke: var(--viewer-text) !important; }

    .viewer-close {
        pointer-events: auto !important;
        top: 1rem !important;
        right: 1rem !important;
        color: var(--viewer-text) !important;
    }
    .viewer-close svg { stroke: var(--viewer-text) !important; }

    .viewer-image-info { opacity: 0 !important; }

    .viewer-layout .viewer-colaboracion {
        color: var(--viewer-text-muted) !important;
        font-size: 0.85rem !important;
        text-shadow: none !important;
        margin: 0 !important;
        font-style: italic !important;
    }
}

@media (max-width: 480px) {
    .viewer-right { padding: 1rem !important; }
    .viewer-left { padding: 0.75rem !important; }
    .nav-arrow { width: 40px !important; height: 40px !important; }
    #viewer-counter { font-size: 1.5rem !important; }
}