/**
 * Project: ebook.oceweb.net
 * Copyright (C) 2007–2026 Renato Brunetti <oceweb@oceweb.net>
 * SPDX-License-Identifier: Proprietary
 *
 * Design System — light mode only, classic editorial portal
 */

/* ─── DESIGN TOKENS ─────────────────────────────────────────────────────── */
:root {
    color-scheme: light;

    /* Palette */
    --page:         #f5f2eb;
    --surface:      #ffffff;
    --surface-warm: #fffef9;
    --brand:        #1b5f91;
    --brand-dark:   #0d3f68;
    --brand-mid:    #2b79b6;
    --brand-light:  #e6f1fa;
    --accent:       #3a93a0;
    --accent-dark:  #27666a;
    --accent-light: #e5f6f5;
    --warm-gold:    #9a7c3f;
    --warm-gold-bg: #faf6ed;
    --prime:        #f90;   /* Amazon Prime Reading */

    /* Neutral scale */
    --gray-900:  #1a2228;
    --gray-700:  #3e4c57;
    --gray-500:  #647480;
    --gray-300:  #c8d2d9;
    --gray-100:  #f0f2f4;

    /* Status */
    --success:   #27855a;
    --success-bg:#eaf5ee;
    --danger:    #c43c32;

    /* Geometry */
    --radius-sm: 4px;
    --radius:    8px;
    --radius-lg: 12px;
    --shadow-xs: 0 1px 2px rgb(20 45 65 / 8%);
    --shadow-sm: 0 2px 6px rgb(20 45 65 / 10%);
    --shadow-md: 0 4px 14px rgb(20 45 65 / 12%);

    /* Typography */
    --font-body:    'Inter', 'Segoe UI', system-ui, sans-serif;
    --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;

    /* Spacing scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 24px;
    --space-6: 32px;
    --space-7: 48px;
}

/* ─── RESET & BASE ───────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html {
    background: var(--page);
    color: var(--gray-900);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--page);
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

main { flex: 1; }

a {
    color: var(--brand);
    text-decoration: none;
    transition: color 0.15s;
}
a:hover { color: var(--brand-dark); text-decoration: underline; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid #e07c00;
    outline-offset: 2px;
    border-radius: 3px;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    margin-top: 0;
}

img { max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; }

/* ─── UTILITIES ──────────────────────────────────────────────────────────── */
.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.shell {
    width: min(1440px, calc(100% - 32px));
    margin-inline: auto;
}

.skip-link {
    position: fixed; z-index: 9999; top: 10px; left: 10px;
    transform: translateY(-160%);
    background: var(--surface); color: var(--brand-dark);
    border: 2px solid var(--brand);
    padding: 8px 16px; font-weight: 700; font-size: .9rem;
    border-radius: var(--radius); box-shadow: var(--shadow-md);
    transition: transform 0.2s ease;
}
.skip-link:focus, .skip-link:focus-visible { transform: translateY(0); }

/* ─── UTILITY BAR ────────────────────────────────────────────────────────── */
.utility-bar {
    border-bottom: 1px solid #e0dbd3;
    background: #fcfaf6;
    font-size: .82rem;
}
.utility-inner {
    min-height: 38px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}
.utility-links {
    display: flex;
    gap: var(--space-5);
    align-items: center;
    color: var(--gray-500);
}
.utility-links a { color: var(--gray-500); }
.utility-links a:hover { color: var(--brand); }

.site-search {
    display: flex;
    width: min(280px, 30vw);
}
.site-search input {
    width: 100%;
    border: 1px solid var(--gray-300);
    border-right: 0;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    padding: 5px 10px;
    background: var(--surface);
    font-size: .82rem;
    transition: border-color 0.15s;
}
.site-search input:focus { border-color: var(--brand); outline: none; }
.site-search button {
    border: 1px solid var(--gray-300);
    border-left: 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: var(--surface);
    padding: 0 10px;
    color: var(--gray-500);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    display: flex; align-items: center;
}
.site-search button:hover { background: var(--brand-light); color: var(--brand); }

/* ─── SITE HEADER ────────────────────────────────────────────────────────── */
.site-header {
    background: var(--surface);
    border-bottom: 1px solid #ddd8cf;
    box-shadow: var(--shadow-xs);
}
.brand-row {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    padding-block: var(--space-3);
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--brand);
    text-decoration: none;
}
.brand:hover { text-decoration: none; opacity: .9; }

.brand-logo {
    display: block;
    width: auto;
    height: 96px;
    object-fit: cover;
    object-position: center;
    border-radius: var(--radius);
    flex-shrink: 0;
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border: 2px solid var(--brand);
    border-radius: var(--radius);
    background: var(--brand-light);
    flex-shrink: 0;
    transition: background 0.2s;
    font-size: 1.4rem;
    color: var(--brand);
}
.brand:hover .brand-icon { background: var(--brand); color: #fff; }

.brand-text strong {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(1.4rem, 2.2vw, 2rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -.03em;
}
.brand-text small {
    display: block;
    color: var(--gray-500);
    font-size: .82rem;
    font-family: var(--font-body);
    font-weight: 400;
    margin-top: 3px;
}

.header-links {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}
.header-links a {
    color: var(--gray-700);
    font-size: .88rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}
.header-links a:hover {
    background: var(--brand-light);
    color: var(--brand);
    text-decoration: none;
}
.header-links i { font-size: .9rem; }

/* ─── BOOK NAV ───────────────────────────────────────────────────────────── */
.nav-wrap {
    background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand) 100%);
    border-top: 1px solid rgba(255,255,255,0.12);
    box-shadow: 0 2px 8px rgb(0 0 0 / 20%);
}
.book-nav {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.book-nav::-webkit-scrollbar { display: none; }
.book-nav a {
    color: rgba(255,255,255,0.85);
    font-weight: 500;
    font-size: .88rem;
    white-space: nowrap;
    padding: 13px 18px;
    border-right: 1px solid rgba(255,255,255,0.12);
    text-shadow: 0 1px 2px rgba(0,0,0,0.25);
    transition: background 0.15s, color 0.15s;
    display: flex;
    align-items: center;
    gap: 7px;
}
.book-nav a:hover {
    background: rgba(255,255,255,0.12);
    color: #fff;
    text-decoration: none;
}
.book-nav a[aria-current="page"] {
    background: rgba(255,255,255,0.18);
    color: #fff;
    font-weight: 600;
    border-bottom: 3px solid rgba(255,255,255,0.6);
}
.book-nav i { font-size: .85rem; opacity: .8; }

.nav-toggle {
    display: none;
    width: 100%;
    color: #fff;
    background: transparent;
    border: 0;
    padding: 13px 16px;
    text-align: left;
    font-weight: 600;
    font-size: .9rem;
    cursor: pointer;
    align-items: center;
    gap: 8px;
}
.nav-toggle i { font-size: 1rem; }

/* ─── PORTAL LAYOUT ──────────────────────────────────────────────────────── */
.portal-layout {
    display: grid;
    grid-template-columns: 285px minmax(0, 1fr);
    gap: var(--space-5);
    padding-block: var(--space-5);
    align-items: start;
}

/* Sidebar: visibile solo su desktop */
.sidebar { min-width: 0; }
.main-column { min-width: 0; }

/* Hamburger per sidebar su mobile */
.sidebar-toggle {
    display: none;
    width: 100%;
    align-items: center;
    gap: 10px;
    background: var(--brand);
    color: #fff;
    border: 0;
    border-radius: var(--radius-sm);
    padding: 11px 16px;
    font-size: .9rem;
    font-weight: 600;
    cursor: pointer;
    margin-bottom: var(--space-3);
}
.sidebar-toggle i { font-size: 1rem; }
.sidebar-toggle .toggle-label-close { display: none; }
.sidebar-toggle.is-open .toggle-label-open { display: none; }
.sidebar-toggle.is-open .toggle-label-close { display: inline; }

/* ─── PORTAL BOX (cards) ─────────────────────────────────────────────────── */
.portal-box {
    background: var(--surface);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: var(--space-4);
    transition: box-shadow 0.2s;
}
.portal-box:last-child { margin-bottom: 0; }

.box-title {
    margin: 0;
    padding: 10px 16px;
    border-bottom: 1px solid var(--gray-300);
    font-family: var(--font-body);
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    line-height: 1.3;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--gray-100);
    color: var(--gray-700);
}
.box-title i { font-size: .85rem; }
.box-title-blue {
    background: linear-gradient(135deg, var(--brand-light), #f0f6fc);
    color: var(--brand-dark);
    border-bottom-color: #c8dff0;
}
.box-title-teal {
    background: linear-gradient(135deg, var(--accent-light), #ecfaf8);
    color: var(--accent-dark);
    border-bottom-color: #b8e0dd;
}
.box-title-gold {
    background: linear-gradient(135deg, var(--warm-gold-bg), #fef5da);
    color: var(--warm-gold);
    border-bottom-color: #e8d8a0;
}

/* ─── SIDEBAR NAV ────────────────────────────────────────────────────────── */
.side-nav { display: grid; }
.side-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--brand);
    border-bottom: 1px solid var(--gray-100);
    font-size: .9rem;
    font-weight: 500;
    transition: background 0.15s, color 0.15s, padding-left 0.15s;
}
.side-nav a:last-child { border-bottom: 0; }
.side-nav a:hover {
    background: var(--brand-light);
    color: var(--brand-dark);
    padding-left: 20px;
    text-decoration: none;
}
.side-nav a[aria-current="page"] {
    background: linear-gradient(90deg, var(--brand-light), #f8fbff);
    color: var(--brand-dark);
    font-weight: 700;
    border-left: 3px solid var(--brand);
}
.side-nav-icon { width: 18px; text-align: center; color: var(--brand-mid); flex-shrink: 0; }
.side-nav-arrow { margin-left: auto; color: var(--gray-300); font-size: .75rem; }

/* ─── QUICK / SPONSOR LINKS ──────────────────────────────────────────────── */
.quick-links { display: grid; }
.quick-links a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 16px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    font-size: .88rem;
    transition: background 0.15s, color 0.15s;
}
.quick-links a:last-child { border-bottom: 0; }
.quick-links a:hover {
    background: var(--warm-gold-bg);
    color: var(--warm-gold);
    text-decoration: none;
}
.quick-links .ql-icon { width: 18px; text-align: center; color: var(--warm-gold); flex-shrink: 0; }
.quick-links .ql-ext { margin-left: auto; font-size: .7rem; color: var(--gray-300); }

/* ─── NEWSLETTER ─────────────────────────────────────────────────────────── */
.newsletter p { margin: 12px 16px 10px; font-size: .88rem; line-height: 1.5; color: var(--gray-700); }
.inline-form { display: flex; gap: 6px; padding: 0 16px 10px; }
.inline-form input[type="email"] {
    min-width: 0; width: 100%;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    font-size: .85rem;
    transition: border-color 0.15s;
}
.inline-form input[type="email"]:focus { border-color: var(--brand); outline: none; }
.inline-form button {
    border: 1px solid var(--brand-dark);
    border-radius: var(--radius-sm);
    color: #fff;
    background: linear-gradient(135deg, var(--brand-mid), var(--brand-dark));
    padding: 8px 14px;
    font-size: .82rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: opacity 0.15s;
    display: flex; align-items: center; gap: 6px;
}
.inline-form button:hover { opacity: .88; }
.gdpr-check {
    padding: 0 16px 14px;
    font-size: .78rem;
    color: var(--gray-500);
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.45;
}
.gdpr-check input[type="checkbox"] {
    margin-top: 2px;
    width: 14px; height: 14px;
    flex-shrink: 0;
    accent-color: var(--brand);
    cursor: pointer;
}
.gdpr-check a { color: var(--brand); }

/* ─── HOME CATALOG ───────────────────────────────────────────────────────── */
.home-hero {
    padding: var(--space-5) var(--space-5) var(--space-4);
    border-bottom: 1px solid var(--gray-100);
}
.home-hero h1 {
    font-size: clamp(1.5rem, 3vw, 2.4rem);
    color: var(--brand-dark);
    margin-bottom: var(--space-2);
}
.home-hero p {
    color: var(--gray-700);
    margin: 0;
    max-width: 65ch;
    font-size: .95rem;
}
.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
    padding: var(--space-5);
}
.catalog-card {
    background: var(--surface);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: box-shadow 0.2s, transform 0.2s;
}
.catalog-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.catalog-card-cover {
    aspect-ratio: 16 / 7;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
}
.catalog-mini-cover {
    width: 80px;
    aspect-ratio: 2/3;
    border-radius: 4px;
    box-shadow: 3px 3px 10px rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-family: var(--font-heading);
    font-size: .65rem;
    font-weight: 700;
    text-align: center;
    padding: 6px;
    line-height: 1.2;
    flex-shrink: 0;
}
.catalog-card-body {
    padding: var(--space-4);
    flex: 1;
    display: flex;
    flex-direction: column;
}
.catalog-card-body h2 {
    font-size: 1.05rem;
    color: var(--brand-dark);
    margin-bottom: 6px;
    font-family: var(--font-heading);
}
.catalog-card-body p {
    font-size: .85rem;
    color: var(--gray-700);
    margin: 0 0 var(--space-4);
    flex: 1;
    line-height: 1.5;
}
.catalog-card-footer {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

/* ─── BOOK DETAIL ────────────────────────────────────────────────────────── */
.book-grid {
    display: grid;
    grid-template-columns: 155px minmax(0, 1fr) 230px;
    gap: 24px;
    padding: 20px 20px 24px;
    align-items: start;
}
.book-cover {
    aspect-ratio: 2 / 3;
    min-height: 232px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    text-align: center;
    padding: 22px 12px 14px;
    color: #fff;
    border-radius: 5px;
    box-shadow: 4px 4px 16px rgb(0 0 0 / 28%), inset 0 0 0 1px rgba(255,255,255,0.15);
}
.book-cover strong {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    line-height: 1.15;
    text-shadow: 0 1px 3px rgba(0,0,0,0.4);
}
.book-cover strong:first-child { margin-top: 4px; }
.book-cover span {
    margin-top: auto;
    font-size: .62rem;
    letter-spacing: .2em;
    text-transform: uppercase;
    opacity: .7;
}
.cover-blue   { background: radial-gradient(circle at 50% 55%, #2e7896 0 20%, transparent 21%), linear-gradient(145deg, #1a4b7d, #071e3c); }
.cover-green  { background: linear-gradient(145deg, #2f7d5e, #0f4030); }
.cover-purple { background: linear-gradient(145deg, #5e316a, #271334); }
.cover-navy   { background: linear-gradient(145deg, #1d5e8c, #0b2e54); }

.book-copy h2 {
    margin: 0 0 10px;
    font-family: var(--font-heading);
    font-size: 1.45rem;
    color: var(--gray-900);
    line-height: 1.2;
}
.book-copy p { line-height: 1.6; margin: 0 0 12px; color: var(--gray-700); }
.check-list {
    list-style: none;
    padding: 0;
    margin: 8px 0 18px;
    display: grid;
    gap: 6px;
}
.check-list li {
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: .9rem;
    color: var(--gray-700);
}
.check-list li i { color: var(--success); font-size: .85rem; margin-right: 2px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }

/* ─── METADATA ────────────────────────────────────────────────────────────── */
.metadata {
    margin: 0;
    padding: 0;
    border: 1px solid #e0d9c3;
    border-radius: var(--radius);
    background: linear-gradient(135deg, #fffdf7, #faf5e8);
    overflow: hidden;
}
.metadata div {
    display: grid;
    grid-template-columns: 110px 1fr;
    align-items: baseline;
    gap: 6px;
    padding: 10px 14px;
    border-bottom: 1px solid #e8e1ca;
}
.metadata div:last-child { border-bottom: 0; }
.metadata dt {
    color: var(--gray-500);
    font-size: .82rem;
    display: flex;
    align-items: baseline;
    gap: 5px;
    white-space: nowrap;
}
.metadata dt i { color: var(--warm-gold); font-size: .78rem; }
.metadata dd {
    margin: 0;
    font-weight: 600;
    font-size: .88rem;
    color: var(--gray-900);
    word-break: break-word;
}

/* ─── BUTTONS ────────────────────────────────────────────────────────────── */
.button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 7px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    min-height: 40px;
    padding: 8px 18px;
    font-weight: 600;
    font-size: .88rem;
    cursor: pointer;
    transition: all 0.18s;
    letter-spacing: .01em;
    white-space: nowrap;
}
.button:hover { text-decoration: none; }
.button i { font-size: .9rem; }

.button-primary {
    color: #fff;
    border-color: var(--brand-dark);
    background: linear-gradient(135deg, var(--brand-mid), var(--brand-dark));
    box-shadow: 0 2px 4px rgba(13,63,104,0.25);
}
.button-primary:hover {
    background: linear-gradient(135deg, var(--brand-dark), #092d50);
    box-shadow: 0 3px 8px rgba(13,63,104,0.35);
    color: #fff;
}
.button-secondary {
    color: var(--brand);
    border-color: var(--gray-300);
    background: var(--surface);
    box-shadow: var(--shadow-xs);
}
.button-secondary:hover {
    background: var(--brand-light);
    border-color: var(--brand);
    color: var(--brand-dark);
}
.button-prime {
    color: #111;
    border-color: #e6a100;
    background: linear-gradient(135deg, #ffd050, #ffad00);
    box-shadow: 0 2px 4px rgba(200, 120, 0, 0.2);
}
.button-prime:hover {
    background: linear-gradient(135deg, #ffc100, #e69500);
    color: #000;
    box-shadow: 0 3px 8px rgba(200, 120, 0, 0.3);
}
.button-prime i { color: #111; }
.button-small { min-height: 32px; padding: 5px 12px; font-size: .8rem; }

/* ─── RESOURCE TABLE ─────────────────────────────────────────────────────── */
.resource-table { display: grid; }
.resource-row {
    display: grid;
    grid-template-columns: 1.2fr 2fr .55fr .5fr .7fr;
    align-items: center;
    min-height: 46px;
    border-bottom: 1px solid var(--gray-100);
    transition: background 0.12s;
}
.resource-row:hover:not(.resource-head) { background: #fafbfc; }
.resource-row > * { padding: 9px 14px; min-width: 0; }
.resource-head {
    min-height: 36px;
    color: var(--gray-500);
    font-size: .75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    background: var(--gray-100);
    border-bottom: 2px solid var(--gray-300);
}
.resource-name { display: flex; align-items: center; gap: 10px; }
.resource-name-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px; height: 28px;
    border-radius: var(--radius-sm);
    background: var(--success-bg);
    color: var(--success);
    flex-shrink: 0;
    font-size: .9rem;
}
.resource-name span { font-size: .88rem; font-weight: 500; }
.resource-description { white-space: pre-line; overflow-wrap: anywhere; }

.format-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    border-radius: var(--radius-sm);
    padding: 3px 8px;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .04em;
    border: 1px solid currentColor;
}
.format-pdf { color: var(--danger); background: #fff5f5; }
.format-zip { color: var(--brand); background: var(--brand-light); }

.count-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: var(--gray-100);
    color: var(--gray-500);
    border-radius: 20px;
    padding: 3px 10px;
    font-size: .78rem;
    font-weight: 500;
}
.count-badge i { font-size: .7rem; }

.info-note {
    margin: 0;
    padding: 10px 14px;
    background: #fafbfc;
    color: var(--gray-500);
    font-size: .8rem;
    display: flex;
    align-items: center;
    gap: 7px;
}
.info-note i { color: var(--accent); }

.empty-state {
    display: grid;
    gap: 6px;
    padding: 36px;
    text-align: center;
    color: var(--gray-500);
}
.empty-state strong { color: var(--gray-700); display: block; margin-bottom: 4px; }
.empty-state i { font-size: 2.5rem; color: var(--gray-300); display: block; margin: 0 auto var(--space-3); }

/* ─── RELATED BOOKS ──────────────────────────────────────────────────────── */
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
}
.related-card {
    display: grid;
    grid-template-columns: 76px 1fr;
    gap: 14px;
    padding: 16px;
    border-right: 1px solid var(--gray-100);
    transition: background 0.15s;
}
.related-card:last-child { border-right: 0; }
.related-card:hover { background: #fafbfc; }
.related-card h3 {
    margin: 0 0 6px;
    font-family: var(--font-heading);
    font-size: .95rem;
    color: var(--brand-dark);
    line-height: 1.3;
}
.related-card p { margin: 0 0 10px; line-height: 1.45; font-size: .82rem; color: var(--gray-700); }
.related-card a { font-size: .82rem; font-weight: 600; }
.mini-cover {
    aspect-ratio: 2 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    color: #fff;
    text-align: center;
    font-size: .65rem;
    font-weight: 700;
    font-family: var(--font-heading);
    line-height: 1.2;
    border-radius: 4px;
    box-shadow: 2px 3px 8px rgb(0 0 0 / 22%);
}

/* ─── ERROR PANEL ────────────────────────────────────────────────────────── */
.error-panel {
    text-align: center;
    padding: var(--space-7) var(--space-5);
}
.error-panel i.error-icon { font-size: 4rem; color: var(--gray-300); display: block; margin-bottom: var(--space-4); }
.error-panel h1 {
    font-size: 4.5rem;
    line-height: 1;
    color: var(--brand);
    margin-bottom: var(--space-3);
    font-family: var(--font-heading);
}
.error-panel p { color: var(--gray-700); margin-bottom: var(--space-5); }

/* ─── PAGE PANEL (legal) ─────────────────────────────────────────────────── */
.page-panel .box-title { font-size: 1rem; text-transform: none; font-family: var(--font-heading); }
.page-panel h3 { font-size: 1rem; color: var(--brand-dark); margin-top: var(--space-4); }
.page-panel p { font-size: .92rem; color: var(--gray-700); line-height: 1.65; }

/* ─── ADMIN ──────────────────────────────────────────────────────────────── */
.admin-body { background: #f0f3f7; }
.admin-body .site-header { background: var(--brand-dark); border-bottom: none; }
.admin-body .brand-icon { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.25); color: #fff; }
.admin-body .brand:hover .brand-icon { background: rgba(255,255,255,0.2); }
.admin-body .brand-text strong { color: #fff; }
.admin-body .brand-text small { color: rgba(255,255,255,0.6); }
.admin-body .header-links a { color: rgba(255,255,255,0.75); }
.admin-body .header-links a:hover { background: rgba(255,255,255,0.12); color: #fff; }
.admin-content { padding: 20px; }
.admin-stat-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin: 20px 0 26px; }
.admin-stat { border: 1px solid var(--gray-300); border-radius: var(--radius); padding: 16px; text-align: center; background: #fff; }
.admin-stat strong { display: block; font-size: 1.8rem; line-height: 1.1; }
.admin-stat span { display: block; color: var(--gray-700); margin-top: 6px; font-size: .85rem; }
.admin-stat-books strong { color: #1b5f91; }.admin-stat-visits strong { color: #91611b; }.admin-stat-downloads strong { color: #6a2789; }.admin-stat-audit strong { color: #27666a; }
.admin-section { border-top: 1px solid var(--gray-200); padding-top: 18px; margin-top: 22px; }
.admin-section h2 { color: var(--brand-dark); font-size: 1.05rem; margin: 0 0 12px; }
.admin-section-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.admin-legend { color: var(--gray-700); font-size: .8rem; display: flex; align-items: center; gap: 5px; }.admin-legend span:not(:first-child) { margin-left: 10px; }
.legend-visits, .legend-downloads { width: 10px; height: 10px; border-radius: 2px; display: inline-block; }.legend-visits { background: #4d86b8; }.legend-downloads { background: #9b6db1; }
.admin-chart { min-height: 280px; padding: 14px 10px 0; border-bottom: 1px solid var(--gray-300); background: repeating-linear-gradient(to top, transparent 0, transparent 54px, #eef1f4 55px); }
.admin-chart-canvas-wrap { position: relative; height: 280px; }
.admin-chart-selection { min-height: 1.35em; margin-top: 8px; color: var(--brand-dark); font-size: .82rem; font-weight: 600; }
.admin-chart-fallback { margin-top: 12px; overflow-x: auto; }
.admin-chart-fallback-table { width: 100%; border-collapse: collapse; font-size: .78rem; }
.admin-chart-fallback-table caption { margin-bottom: 6px; text-align: left; color: var(--gray-700); font-weight: 700; }
.admin-chart-fallback-table th, .admin-chart-fallback-table td { padding: 6px 8px; border-bottom: 1px solid var(--gray-100); text-align: right; }
.admin-chart-fallback-table th:first-child { text-align: left; }
.admin-dashboard.chartjs-ready .admin-chart-fallback { display: none; }
.admin-muted { color: var(--gray-500); font-size: .8rem; }.admin-two-columns { display: block; }.admin-table-wrap { overflow-x: auto; }.admin-table { width: 100%; border-collapse: collapse; font-size: .78rem; }.admin-table th, .admin-table td { text-align: left; vertical-align: top; padding: 8px; border-bottom: 1px solid var(--gray-100); }.admin-table th { background: #f8f9fa; color: var(--brand-dark); white-space: nowrap; }.admin-table td:last-child { max-width: 190px; overflow-wrap: anywhere; }.admin-table code { color: var(--brand); }.admin-event { font-size: .72rem; font-weight: 700; }.admin-event-started { color: #27666a; }.admin-event-denied, .admin-event-failed { color: #a33a3a; }
.admin-pagination { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 8px; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--gray-200); color: var(--gray-500); font-size: .78rem; }
.admin-page-status { display: inline-flex; align-items: center; min-height: 34px; padding: 6px 10px; border: 1px solid var(--gray-300); border-radius: var(--radius-sm); background: #fff; color: var(--gray-700); white-space: nowrap; }
.admin-page-link { display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 34px; padding: 6px 11px; border: 1px solid var(--gray-300); border-radius: var(--radius-sm); background: #fff; color: var(--brand); font-weight: 700; text-decoration: none; box-shadow: var(--shadow-xs); white-space: nowrap; }
.admin-page-link:hover { border-color: var(--brand); background: var(--brand-light); color: var(--brand-dark); text-decoration: none; }.admin-page-link:focus-visible, .admin-page-status:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.admin-pagination.is-loading { opacity: .6; pointer-events: none; }
.search-content { padding: 20px; }.search-page-form label { display: block; color: var(--brand-dark); font-weight: 700; margin-bottom: 6px; }.search-page-form > div { display: flex; gap: 8px; }.search-page-form input { min-width: 0; flex: 1; border: 1px solid var(--gray-300); border-radius: var(--radius-sm); padding: 10px 12px; font: inherit; }.search-page-form input:focus { border-color: var(--brand); outline: 2px solid rgba(32,58,99,.18); }.search-hint { color: var(--gray-700); font-size: .9rem; }.search-results { display: grid; gap: 10px; margin-top: 18px; }.search-result { border: 1px solid var(--gray-200); border-radius: var(--radius-sm); padding: 14px 16px; }.search-result h2 { margin: 4px 0; font-size: 1.05rem; }.search-result h2 a { color: var(--brand-dark); }.search-result p { margin: 5px 0 0; color: var(--gray-700); font-size: .88rem; }.search-result-type { color: var(--teal, #27666a); font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }.search-result-parent { font-size: .78rem !important; color: var(--gray-500) !important; }

/* ─── FOOTER ─────────────────────────────────────────────────────────────── */
.site-footer {
    border-top: 1px solid #ddd8cf;
    background: #f9f7f3;
    color: var(--gray-500);
    font-size: .82rem;
    margin-top: auto;
}
.footer-inner {
    min-height: 54px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5);
    padding-block: var(--space-3);
}
.footer-inner nav { display: flex; gap: var(--space-4); flex-wrap: wrap; }
.footer-inner nav a { color: var(--gray-500); transition: color 0.15s; }
.footer-inner nav a:hover { color: var(--brand); }

/* ─── RESPONSIVE ─────────────────────────────────────────────────────────── */
@media (max-width: 1100px) {
    .portal-layout { grid-template-columns: 255px minmax(0, 1fr); gap: var(--space-4); }
    .book-grid { grid-template-columns: 140px 1fr; gap: 18px; }
    .metadata { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border-radius: 0 0 var(--radius) var(--radius); }
    .metadata div { display: grid; grid-template-columns: 100px 1fr; padding: 10px 14px; border-right: 1px solid #e8e1ca; border-bottom: 1px solid #e8e1ca; }
    .related-grid { grid-template-columns: 1fr 1fr; }
    .related-card:nth-child(2) { border-right: 0; }
    .related-card:nth-child(3) { grid-column: 1; border-right: 0; border-bottom: 0; }
}

@media (max-width: 860px) {
    .admin-stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }.admin-chart { padding-inline: 4px; }.admin-chart-canvas-wrap { height: 250px; }
    /* Sidebar: nascosta su mobile, visibile solo quando aperta */
    .portal-layout { grid-template-columns: 1fr; }
    .sidebar-toggle { display: flex; }
    .sidebar-content { display: none; }
    .sidebar-content.is-open { display: block; }
    .sidebar .portal-box { margin-bottom: var(--space-3); }

    .utility-links span, .utility-links a:nth-child(3) { display: none; }
    .header-links a span { display: none; }
    .site-search { width: min(240px, 40vw); }

    .resource-head { display: none; }
    .resource-row:not(.resource-head) {
        grid-template-columns: 1fr 1fr;
        gap: 4px 12px;
        padding: 12px;
        min-height: auto;
    }
    .resource-row > * { padding: 4px 0; }
    .resource-row [data-label]::before {
        content: attr(data-label) ": ";
        color: var(--gray-500);
        font-size: .75rem;
        font-weight: 700;
        display: block;
    }
    .book-grid { padding: 16px; gap: 16px; }
    .metadata div { grid-template-columns: 90px 1fr; }
}

@media (max-width: 620px) {
    .admin-content, .search-content { padding: 14px; }.admin-stat-grid { gap: 8px; }.admin-stat { padding: 12px 8px; }.admin-stat strong { font-size: 1.4rem; }.admin-chart { min-height: 230px; padding-inline: 2px; }.admin-chart-canvas-wrap { height: 220px; }.admin-chart-selection { font-size: .76rem; }.search-page-form > div { align-items: stretch; flex-direction: column; }
    .shell { width: calc(100% - 20px); }
    .utility-inner { justify-content: flex-end; }
    .utility-links { display: none; }
    .site-search { width: 100%; }
    .brand-row { min-height: 60px; }
    .brand-logo { width: 150px; height: 50px; }
    .brand-icon { width: 42px; height: 42px; font-size: 1.2rem; }
    .brand-text strong { font-size: 1.4rem; }
    .brand-text small { display: none; }
    .header-links { gap: var(--space-2); }
    .nav-toggle { display: flex; }
    .book-nav { display: none; flex-direction: column; }
    .book-nav.is-open { display: flex; }
    .book-nav a { border-right: 0; border-top: 1px solid rgba(255,255,255,0.1); }
    .portal-layout { padding-block: var(--space-4); gap: var(--space-3); }
    .book-grid { grid-template-columns: 1fr; }
    .book-cover { width: 130px; min-height: 195px; margin-inline: auto; }
    .book-copy h2 { font-size: 1.25rem; }
    .metadata { grid-template-columns: 1fr; }
    .metadata div { border-right: 0; grid-template-columns: 95px 1fr; }
    .resource-row:not(.resource-head) { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
    .related-card { border-right: 0; border-bottom: 1px solid var(--gray-100); }
    .footer-inner { flex-direction: column; align-items: flex-start; padding-block: var(--space-4); gap: var(--space-3); }
    .footer-inner nav { gap: 8px 16px; }
    .brand-row { gap: var(--space-3); }
    .catalog-grid { grid-template-columns: 1fr; padding: var(--space-4); }
}