:root {
    --sg-azul: #1a3c6e;
    --sg-azul-oscuro: #0f2547;
    --sg-gris-pizarra: #3e4652;
    --sg-gris-pizarra-oscuro: #2b313a;
    --sg-dorado: #c9a227;
    --sg-dorado-claro: #e6c85a;
    --sg-gris-fondo: #f4f6fa;
    --sg-texto: #2b2f36;
    --sidebar-width: 250px;
    --sidebar-width-collapsed: 72px;
    --topbar-height: 64px;
}

body {
    background-color: var(--sg-gris-fondo);
    color: var(--sg-texto);
    font-family: "Segoe UI", Roboto, Arial, sans-serif;
}

/* ---------- Topbar ---------- */
.topbar {
    background-image: linear-gradient(90deg, rgba(43,49,58,.94) 0%, rgba(62,70,82,.90) 55%, rgba(62,70,82,.80) 100%), url("../img/fachada-santuario.jpg");
    background-size: cover;
    background-position: center 30%;
    height: var(--topbar-height);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    padding-left: 0;
}

.topbar .container-fluid {
    height: 100%;
}

.btn-topbar {
    color: var(--sg-dorado-claro);
    background: transparent;
    border: none;
    font-size: 1.4rem;
    line-height: 1;
}

.btn-topbar:hover {
    color: #fff;
}

.brand-text {
    color: #fff;
    font-weight: 600;
    letter-spacing: .3px;
}

.brand-logo {
    height: 36px;
    width: auto;
}

/* ---------- Sidebar ---------- */
.sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--sg-azul-oscuro);
    display: flex;
    flex-direction: column;
    z-index: 1020;
    transition: width .2s ease;
    overflow-x: hidden;
}

.sidebar::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
    opacity: .16;
    background-image: url("../img/guadalupe-sidebar.jpg");
    background-repeat: no-repeat;
    /* Se muestra solo un segmento (rostro y manos) de la imagen, recortado por el ancho del sidebar */
    background-position: -260px -40px;
    background-size: 780px auto;
}

.sidebar::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
    background-image: linear-gradient(180deg, rgba(15,37,71,.55) 0%, rgba(15,37,71,.92) 55%, var(--sg-azul-oscuro) 85%);
}

.sidebar > * {
    position: relative;
    z-index: 1;
}

.sidebar-header {
    border-bottom: 1px solid rgba(255,255,255,.1);
}

.sidebar-logo {
    height: 32px;
    width: auto;
}

.sidebar-title {
    color: #fff;
    font-weight: 600;
    white-space: nowrap;
}

.sidebar-nav {
    padding-top: .5rem;
    overflow-y: auto;
}

.sidebar-section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .9rem 1.25rem .35rem;
    color: rgba(255,255,255,.45);
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    white-space: nowrap;
    border-top: 1px solid rgba(255,255,255,.08);
    margin-top: .5rem;
}

.section-dots {
    display: none;
}

.sidebar-nav .nav-link {
    color: rgba(255,255,255,.75);
    padding: .75rem 1.25rem;
    display: flex;
    align-items: center;
    gap: .9rem;
    white-space: nowrap;
    border-left: 3px solid transparent;
    transition: background-color .15s ease, color .15s ease;
}

.sidebar-nav .nav-link i {
    font-size: 1.15rem;
    width: 1.3rem;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-nav .nav-link:hover {
    background-color: rgba(255,255,255,.06);
    color: #fff;
}

.sidebar-nav .nav-link.active {
    background-color: rgba(201,162,39,.15);
    border-left-color: var(--sg-dorado);
    color: var(--sg-dorado-claro);
}

.sidebar-footer {
    padding: .75rem 1.25rem;
    border-top: 1px solid rgba(255,255,255,.1);
    white-space: nowrap;
    overflow: hidden;
}

.admin-trigger {
    color: rgba(255,255,255,.18);
    font-size: 1.3rem;
    cursor: pointer;
    flex-shrink: 0;
    transition: color .2s ease;
}

.admin-trigger:hover {
    color: var(--sg-dorado-claro);
}

body.sidebar-collapsed .sidebar-footer {
    justify-content: center;
    gap: .5rem;
}

.btn-sg-primary {
    background-color: var(--sg-azul);
    border-color: var(--sg-azul);
    color: #fff;
}

.btn-sg-primary:hover {
    background-color: var(--sg-azul-oscuro);
    border-color: var(--sg-azul-oscuro);
    color: #fff;
}

/* Collapsed state */
body.sidebar-collapsed .sidebar {
    width: var(--sidebar-width-collapsed);
}

body.sidebar-collapsed .sidebar .link-text,
body.sidebar-collapsed .sidebar .sidebar-title {
    display: none;
}

body.sidebar-collapsed .sidebar-section-title {
    justify-content: center;
    padding: .9rem .5rem .35rem;
}

body.sidebar-collapsed .sidebar-section-title .section-dots {
    display: inline;
}

body.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-width-collapsed);
}

/* ---------- Main content ---------- */
.main-content {
    margin-left: var(--sidebar-width);
    padding-top: var(--topbar-height);
    transition: margin-left .2s ease;
    min-height: 100vh;
}

.content-inner {
    padding: 1.75rem;
}

.page-title {
    color: var(--sg-azul-oscuro);
    font-weight: 700;
}

/* ---------- Stat cards ---------- */
.stat-card {
    border: none;
    border-radius: .75rem;
    box-shadow: 0 2px 10px rgba(15, 37, 71, .08);
    overflow: hidden;
    height: 100%;
}

.stat-card .stat-icon {
    width: 56px;
    height: 56px;
    border-radius: .75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: #fff;
    flex-shrink: 0;
}

.stat-card .stat-value {
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--sg-azul-oscuro);
    line-height: 1.1;
}

.stat-card .stat-label {
    color: #6c757d;
    font-size: .9rem;
}

.bg-icon-azul { background-color: var(--sg-azul); }
.bg-icon-dorado { background-color: var(--sg-dorado); }
.bg-icon-guinda { background-color: #7a2036; }
.bg-icon-verde { background-color: #2f7a4d; }

/* ---------- Búsquedas ---------- */
.search-panel {
    background-color: #fff;
    border-radius: .75rem;
    padding: 1.25rem;
    box-shadow: 0 2px 10px rgba(15, 37, 71, .08);
}

.badge-clasificacion {
    display: inline-block;
    padding: .3rem .65rem;
    border-radius: 1rem;
    background-color: rgba(26, 60, 110, .1);
    color: var(--sg-azul);
    font-size: .8rem;
    font-weight: 600;
}

.table thead th {
    color: var(--sg-azul-oscuro);
    border-bottom-width: 2px;
    font-size: .85rem;
    text-transform: uppercase;
    letter-spacing: .03em;
}

.fila-libro {
    cursor: pointer;
}

/* ---------- Ficha del libro (modal) ---------- */
.ficha-modal-dialog {
    max-width: 720px;
}

.ficha-modal-dialog .modal-content {
    max-height: calc(100vh - 3rem);
}

.ficha-portada {
    width: 100%;
    max-width: 160px;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    background-color: #e9ecef;
    margin: 0 auto;
    display: block;
}

.ficha-datos {
    margin: 0;
}

.ficha-dato {
    padding: .3rem 0;
}

.ficha-dato dt {
    font-size: .72rem;
    font-weight: 600;
    color: #6c757d;
    text-transform: uppercase;
    letter-spacing: .02em;
    margin-bottom: .1rem;
}

.ficha-dato dd {
    margin: 0;
    color: var(--sg-texto);
    font-size: .92rem;
}

.pagination .page-link {
    color: var(--sg-azul);
}

.pagination .page-item.active .page-link {
    background-color: var(--sg-azul);
    border-color: var(--sg-azul);
    color: #fff;
}

.pagination .page-link:focus {
    box-shadow: 0 0 0 .25rem rgba(26, 60, 110, .25);
}

/* ---------- Responsive: mobile overlay sidebar ---------- */
@media (max-width: 767.98px) {
    .sidebar {
        width: var(--sidebar-width);
        transform: translateX(-100%);
        box-shadow: 4px 0 12px rgba(0,0,0,.2);
    }

    body.sidebar-mobile-open .sidebar {
        transform: translateX(0);
    }

    body.sidebar-collapsed .sidebar .link-text,
    body.sidebar-collapsed .sidebar .sidebar-title {
        display: inline;
    }

    .main-content,
    body.sidebar-collapsed .main-content {
        margin-left: 0;
    }

    .sidebar-backdrop {
        display: none;
        position: fixed;
        inset: 0;
        top: var(--topbar-height);
        background: rgba(0,0,0,.35);
        z-index: 1010;
    }

    body.sidebar-mobile-open .sidebar-backdrop {
        display: block;
    }
}