/* ============================================
   Calcolo-Mutuo.com — Stylesheet
   Simula, Confronta, Risparmia
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Fira+Code:wght@400;500&display=swap');

:root {
    --color-primary: #1A3A6B;
    --color-primary-light: #2B5EA7;
    --color-primary-dark: #0F2445;
    --color-accent: #E8523F;
    --color-accent-light: #F07563;
    --color-accent-dark: #C93D2B;
    --color-bg: #F7F8FC;
    --color-bg-warm: #EEF1F8;
    --color-bg-card: #FFFFFF;
    --color-text: #1E293B;
    --color-text-light: #475569;
    --color-text-muted: #94A3B8;
    --color-border: #D5DAE6;
    --color-border-light: #E8ECF4;
    --color-success: #16A34A;
    --color-warning: #CA8A04;
    --color-danger: #DC2626;
    --color-info: #2563EB;
    --font-heading: 'DM Serif Display', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'Consolas', monospace;
    --max-width: 1240px;
    --content-width: 760px;
    --sidebar-width: 330px;
    --radius: 8px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px rgba(15,36,69,0.06);
    --shadow-md: 0 4px 16px rgba(15,36,69,0.08);
    --shadow-lg: 0 12px 40px rgba(15,36,69,0.12);
    --transition: 0.2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 17px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-primary-dark);
    line-height: 1.2;
}

/* --- Top Bar --- */
.top-bar {
    background: var(--color-primary-dark);
    color: rgba(255,255,255,0.65);
    font-size: 0.76rem;
    padding: 5px 0;
    letter-spacing: 0.03em;
}
.top-bar .container { display: flex; justify-content: space-between; align-items: center; }
.top-bar a { color: rgba(255,255,255,0.8); }
.top-bar a:hover { color: var(--color-accent-light); }

/* --- Header --- */
.site-header {
    background: var(--color-bg-card);
    border-bottom: 2px solid var(--color-primary);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}
.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}
.site-logo {
    font-family: var(--font-body);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.02em;
}
.site-logo .logo-icon {
    width: 36px; height: 36px;
    background: var(--color-accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 1.1rem;
}
.site-logo .accent { color: var(--color-accent); }

/* --- Nav --- */
.main-nav ul { list-style: none; display: flex; gap: 2px; }
.main-nav a {
    display: block;
    padding: 7px 13px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text);
    border-radius: var(--radius);
    transition: all var(--transition);
    white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active { background: var(--color-primary); color: white; }

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--color-primary-dark);
    padding: 8px;
}

/* --- Container --- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* --- Hero --- */
.hero {
    background: linear-gradient(145deg, var(--color-primary-dark) 0%, var(--color-primary) 60%, var(--color-primary-light) 100%);
    color: white;
    padding: 72px 0 60px;
    position: relative;
    overflow: hidden;
}
.hero::after {
    content: '';
    position: absolute;
    top: -50%; right: -10%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(232,82,63,0.15) 0%, transparent 70%);
    border-radius: 50%;
}
.hero .container { position: relative; z-index: 1; }
.hero h1 {
    font-size: 2.6rem;
    color: white;
    margin-bottom: 18px;
    max-width: 680px;
}
.hero p { font-size: 1.15rem; opacity: 0.88; max-width: 580px; margin-bottom: 30px; line-height: 1.65; }
.hero-stats { display: flex; gap: 36px; margin-top: 32px; }
.hero-stat { text-align: center; }
.hero-stat .number {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--color-accent-light);
    display: block;
}
.hero-stat .label { font-size: 0.82rem; opacity: 0.7; text-transform: uppercase; letter-spacing: 0.05em; }

/* --- Search Bar --- */
.search-section { margin-top: -28px; position: relative; z-index: 10; margin-bottom: 44px; }
.search-box {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 20px 28px;
    display: flex;
    gap: 14px;
    align-items: center;
    max-width: 660px;
    margin: 0 auto;
}
.search-box input {
    flex: 1;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 13px 16px;
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition);
}
.search-box input:focus { border-color: var(--color-primary); }
.search-box button {
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: var(--radius);
    padding: 13px 26px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--transition);
}
.search-box button:hover { background: var(--color-accent-dark); }

/* --- Category Grid --- */
.categories-section { padding: 56px 0; }
.section-title { font-size: 1.9rem; text-align: center; margin-bottom: 10px; }
.section-subtitle { text-align: center; color: var(--color-text-light); margin-bottom: 44px; font-size: 1rem; }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.category-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 26px 22px;
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.category-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: var(--cat-color, var(--color-primary));
    transform: scaleX(0);
    transition: transform var(--transition);
}
.category-card:hover::after { transform: scaleX(1); }
.category-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.category-card .cat-icon { font-size: 2.2rem; margin-bottom: 12px; display: block; }
.category-card h3 { font-size: 1.02rem; margin-bottom: 6px; }
.category-card p { font-size: 0.82rem; color: var(--color-text-muted); line-height: 1.5; }
.category-card .article-count {
    margin-top: 12px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* --- Featured --- */
.featured-section { padding: 56px 0; background: var(--color-bg-warm); }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.article-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}
.article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.article-card-top {
    padding: 5px 14px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: white;
    background: var(--cat-color, var(--color-primary));
}
.article-card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.article-card h3 { font-size: 1.05rem; margin-bottom: 10px; line-height: 1.3; }
.article-card h3 a { color: var(--color-primary-dark); }
.article-card h3 a:hover { color: var(--color-accent); }
.article-card .excerpt { font-size: 0.86rem; color: var(--color-text-light); flex: 1; margin-bottom: 14px; line-height: 1.55; }
.article-card .meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    padding-top: 12px;
    border-top: 1px solid var(--color-border-light);
}

/* --- Article Layout --- */
.article-layout {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: 44px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 36px 20px 72px;
    align-items: start;
}

/* --- Article Content --- */
.article-header { margin-bottom: 32px; padding-bottom: 24px; border-bottom: 2px solid var(--color-border); }
.article-category-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    padding: 4px 10px;
    border-radius: 4px;
    color: white;
    margin-bottom: 14px;
}
.article-header h1 { font-size: 2.2rem; line-height: 1.18; margin-bottom: 16px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 18px; font-size: 0.85rem; color: var(--color-text-muted); }
.article-meta span { display: flex; align-items: center; gap: 5px; }

.article-body { font-size: 1.02rem; line-height: 1.82; }
.article-body p { text-align: justify; margin-bottom: 1.35em; hyphens: auto; overflow-wrap: break-word; }
.article-body h2 {
    font-size: 1.55rem;
    margin-top: 2.6em;
    margin-bottom: 0.85em;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-border-light);
    scroll-margin-top: 85px;
}
.article-body h3 { font-size: 1.25rem; margin-top: 2em; margin-bottom: 0.65em; color: var(--color-primary-light); scroll-margin-top: 85px; }
.article-body ul, .article-body ol { margin-bottom: 1.35em; padding-left: 1.6em; }
.article-body li { margin-bottom: 0.45em; text-align: justify; }
.article-body strong { color: var(--color-primary-dark); }
.article-body blockquote {
    border-left: 4px solid var(--color-accent);
    background: var(--color-bg-warm);
    padding: 18px 22px;
    margin: 1.6em 0;
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
    color: var(--color-text-light);
}

/* Info Boxes */
.info-box { border-radius: var(--radius-lg); padding: 22px 26px; margin: 1.8em 0; border-left: 5px solid; }
.info-box.tip { background: #ECFDF5; border-color: var(--color-success); }
.info-box.warning { background: #FFFBEB; border-color: var(--color-warning); }
.info-box.danger { background: #FEF2F2; border-color: var(--color-danger); }
.info-box.info { background: #EFF6FF; border-color: var(--color-info); }
.info-box .box-title { font-weight: 700; font-size: 0.96rem; margin-bottom: 6px; display: flex; align-items: center; gap: 6px; }
.info-box p { text-align: left !important; margin-bottom: 0.45em; }
.info-box p:last-child { margin-bottom: 0; }

/* Tables */
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.8em 0;
    font-size: 0.9rem;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.article-body thead { background: var(--color-primary); color: white; }
.article-body th { padding: 12px 16px; text-align: left; font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.03em; }
.article-body td { padding: 11px 16px; border-bottom: 1px solid var(--color-border-light); }
.article-body tbody tr:nth-child(even) { background: var(--color-bg-warm); }
.article-body tbody tr:hover { background: #DBEAFE; }

/* --- TOC --- */
.toc {
    background: var(--color-bg-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin: 0 0 2.2em;
    overflow: hidden;
}
.toc-header { padding: 14px 22px; background: var(--color-bg-warm); border-bottom: 1px solid var(--color-border-light); font-size: 0.92rem; }
.toc nav { padding: 14px 22px; }
.toc ol { list-style: none; counter-reset: toc-counter; padding-left: 0; margin-bottom: 0; }
.toc li { counter-increment: toc-counter; margin-bottom: 5px; text-align: left; }
.toc li::before { content: counter(toc-counter) "."; color: var(--color-accent); font-weight: 700; margin-right: 7px; font-size: 0.85rem; }
.toc a { font-size: 0.9rem; color: var(--color-text); }
.toc a:hover { color: var(--color-primary-light); }
.toc li.toc-sub { padding-left: 22px; font-size: 0.85rem; }
.toc li.toc-sub::before { content: "→"; color: var(--color-text-muted); }

/* --- Affiliate --- */
.affiliate-box {
    display: flex; align-items: center; justify-content: space-between; gap: 18px;
    background: var(--color-bg-warm);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 22px 26px;
    margin: 1.8em 0;
    transition: all var(--transition);
}
.affiliate-box:hover { border-color: var(--color-accent); box-shadow: var(--shadow-sm); }
.affiliate-highlight { background: linear-gradient(135deg, #FEF3C7, #FDE68A); border-color: var(--color-warning); }
.affiliate-content h4 { font-family: var(--font-body); font-size: 0.96rem; font-weight: 700; color: var(--color-primary-dark); margin-bottom: 3px; }
.affiliate-content p { text-align: left !important; font-size: 0.85rem; color: var(--color-text-light); margin-bottom: 0 !important; }
.affiliate-cta {
    display: inline-block;
    background: var(--color-accent);
    color: white !important;
    padding: 11px 22px;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 0.85rem;
    white-space: nowrap;
    transition: background var(--transition);
}
.affiliate-cta:hover { background: var(--color-accent-dark); color: white !important; }

/* --- Sidebar --- */
.sidebar { position: sticky; top: 84px; }
.sidebar-widget {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 22px;
    margin-bottom: 20px;
}
.sidebar-widget h4 {
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-primary-dark);
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-accent);
}
.sidebar-widget ul { list-style: none; padding: 0; margin: 0; }
.sidebar-widget li { padding: 9px 0; border-bottom: 1px solid var(--color-border-light); font-size: 0.85rem; }
.sidebar-widget li:last-child { border-bottom: none; }
.sidebar-widget li a { color: var(--color-text); }
.sidebar-widget li a:hover { color: var(--color-primary-light); }

.sidebar-cta {
    border-radius: var(--radius-lg);
    padding: 26px 22px;
    text-align: center;
    margin-bottom: 20px;
    color: white;
}
.sidebar-cta h4 { color: white; font-family: var(--font-heading); font-size: 1.15rem; margin-bottom: 8px; border: none; padding: 0; text-transform: none; letter-spacing: 0; }
.sidebar-cta p { font-size: 0.85rem; opacity: 0.9; margin-bottom: 16px; }
.sidebar-cta a { display: inline-block; background: white; color: var(--color-primary-dark) !important; padding: 10px 24px; border-radius: var(--radius); font-weight: 700; font-size: 0.88rem; }

.ad-block {
    margin: 1.8em 0;
    text-align: center;
    min-height: 90px;
    background: var(--color-bg-warm);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px dashed var(--color-border);
}

/* --- Category Page --- */
.category-hero { padding: 44px 0 36px; background: var(--color-bg-warm); border-bottom: 1px solid var(--color-border); }
.category-hero h1 { font-size: 2rem; margin-bottom: 10px; }
.category-hero p { color: var(--color-text-light); font-size: 1rem; }

.articles-list { display: flex; flex-direction: column; gap: 18px; margin-top: 28px; }
.article-list-item {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: 22px 26px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    transition: all var(--transition);
}
.article-list-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.article-list-item h3 { font-size: 1.05rem; margin-bottom: 5px; }
.article-list-item h3 a { color: var(--color-primary-dark); }
.article-list-item p { font-size: 0.85rem; color: var(--color-text-light); }
.read-more {
    background: var(--color-primary);
    color: white !important;
    padding: 9px 18px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.82rem;
    white-space: nowrap;
}
.read-more:hover { background: var(--color-primary-dark); }

/* --- Breadcrumb --- */
.breadcrumb { padding: 14px 0; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 5px; font-size: 0.8rem; padding: 0; margin: 0; }
.breadcrumb li::after { content: "›"; margin-left: 7px; color: var(--color-text-muted); }
.breadcrumb li:last-child::after { display: none; }
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary-light); }
.breadcrumb li:last-child span { color: var(--color-text); font-weight: 500; }

/* --- Footer --- */
.site-footer { background: var(--color-primary-dark); color: rgba(255,255,255,0.78); padding: 56px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 36px; }
.footer-col h4 { color: white; font-family: var(--font-body); font-size: 0.85rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 16px; }
.footer-col p { font-size: 0.85rem; line-height: 1.6; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col li { margin-bottom: 9px; }
.footer-col a { color: rgba(255,255,255,0.65); font-size: 0.85rem; }
.footer-col a:hover { color: var(--color-accent-light); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; font-size: 0.78rem; color: rgba(255,255,255,0.45); }
.footer-disclaimer { background: rgba(0,0,0,0.2); padding: 14px 0; font-size: 0.75rem; color: rgba(255,255,255,0.4); text-align: center; line-height: 1.5; }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
    .sidebar { position: static; }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .article-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .main-nav { display: none; }
    .main-nav.open {
        display: block;
        position: absolute;
        top: 68px; left: 0; right: 0;
        background: var(--color-bg-card);
        border-bottom: 2px solid var(--color-primary);
        box-shadow: var(--shadow-md);
        padding: 14px;
        z-index: 999;
    }
    .main-nav.open ul { flex-direction: column; }
    .mobile-toggle { display: block; }
}

@media (max-width: 768px) {
    html { font-size: 16px; }
    .header-inner { height: 58px; }
    .main-nav.open { top: 58px; }
    .hero { padding: 48px 0 40px; }
    .hero h1 { font-size: 1.9rem; }
    .hero-stats { flex-direction: column; gap: 14px; align-items: flex-start; }
    .category-grid { grid-template-columns: 1fr; }
    .article-grid { grid-template-columns: 1fr; }
    .article-header h1 { font-size: 1.7rem; }
    .article-list-item { flex-direction: column; align-items: flex-start; }
    .footer-grid { grid-template-columns: 1fr; }
    .affiliate-box { flex-direction: column; text-align: center; }
    .search-box { flex-direction: column; }
}

/* --- Utility --- */
.text-center { text-align: center; }

@media print {
    .site-header, .sidebar, .ad-block, .affiliate-box, .site-footer, .toc { display: none; }
    .article-layout { grid-template-columns: 1fr; }
}