/* ===========================
   RESET E VARIABILI
   =========================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

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

:root {
    --primary: #0056b3;
    --primary-light: #e8f0fb;
    --primary-dark: #003d82;
    --bg: #f4f6f9;
    --white: #ffffff;
    --ink: #111827;
    --ink2: #374151;
    --ink3: #6b7280;
    --border: #e5e7eb;
    --shadow: 0 2px 8px rgba(0,0,0,0.07);
    --shadow-hover: 0 6px 20px rgba(0,0,0,0.11);
    --font: 'Inter', sans-serif;
    --radius: 12px;
    --gray-light: #f9fafb;
}

body {
    font-family: var(--font);
    background-color: var(--bg);
    color: var(--ink);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: var(--primary);
}

a:hover {
    text-decoration: underline;
}

/* ===========================
   HEADER
   =========================== */
.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    max-width: 1040px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.site-title {
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--ink);
    letter-spacing: -0.5px;
    text-decoration: none;
}

.site-title span {
    color: var(--primary);
}

.site-header nav a {
    margin-left: 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ink3);
    text-decoration: none;
    transition: color 0.2s;
}

.site-header nav a:hover {
    color: var(--primary);
    text-decoration: none;
}

/* ===========================
   MAIN CONTAINER
   =========================== */
.page-content {
    max-width: 1040px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
}

/* ===========================
   HOME — HERO CARD
   =========================== */
.hero-card {
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 2rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    box-shadow: var(--shadow);
}

.hero-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--primary-light);
    border: 2px solid #b8d0f5;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--primary);
    flex-shrink: 0;
}

.hero-text .role {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1.2px;
    margin-bottom: 0.4rem;
}

.hero-text h1 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--ink);
    letter-spacing: -0.5px;
    margin-bottom: 0.4rem;
}

.hero-text p {
    font-size: 0.875rem;
    color: var(--ink3);
    line-height: 1.6;
}

/* ===========================
   HOME — LAYOUT A DUE COLONNE
   =========================== */
.home-layout {
    display: grid;
    grid-template-columns: 1fr 310px;
    gap: 2rem;
    align-items: start;
}

.section-title {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--ink3);
    margin-bottom: 1rem;
    padding-left: 2px;
}

/* ===========================
   HOME — POST CARDS
   =========================== */
.post-card {
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    transition: box-shadow 0.25s, transform 0.25s, border-color 0.25s;
    cursor: pointer;
    display: block;
    color: inherit;
    text-decoration: none;
}

.post-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
    border-color: #c7d8f5;
    text-decoration: none;
}

.post-card:hover .card-title {
    color: var(--primary);
}

.card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.card-cat {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--primary);
    background: var(--primary-light);
    padding: 3px 10px;
    border-radius: 20px;
    white-space: nowrap;
}

.card-date {
    font-size: 0.75rem;
    color: var(--ink3);
    white-space: nowrap;
    flex-shrink: 0;
    margin-top: 2px;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--ink);
    line-height: 1.35;
    margin-bottom: 0.5rem;
    transition: color 0.2s;
}

.card-excerpt {
    font-size: 0.875rem;
    color: var(--ink3);
    line-height: 1.65;
}

.card-footer {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
}

.read-more {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
}

/* ===========================
   SIDEBAR
   =========================== */
.sidebar-card {
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow);
}

.sidebar-card h3 {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--ink3);
    margin-bottom: 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--border);
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
    margin-bottom: 1.25rem;
}

.stat {
    text-align: center;
    padding: 0.75rem 0.5rem;
    background: var(--gray-light);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.stat-num {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    display: block;
}

.stat-label {
    font-size: 0.65rem;
    color: var(--ink3);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    line-height: 1.3;
}

/* Social links */
.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    border-radius: 8px;
    background: var(--gray-light);
    border: 1px solid var(--border);
    transition: border-color 0.2s, background 0.2s;
    text-decoration: none;
}

.social-link:hover {
    border-color: #b8d0f5;
    background: var(--primary-light);
    text-decoration: none;
}

.social-link svg {
    width: 15px;
    height: 15px;
    fill: var(--ink2);
    flex-shrink: 0;
}

.social-link span {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--ink2);
}

/* Cert tiers */
.cert-tier-label {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--ink3);
    margin: 0.9rem 0 0.45rem;
    padding-left: 2px;
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.75rem;
    border-radius: 8px;
    margin-bottom: 0.4rem;
    border: 1px solid transparent;
}

.cert-item.tier-top {
    background: #eff6ff;
    border-color: #bfdbfe;
}

.cert-item.tier-top .cert-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
}

.cert-item.tier-top .cert-name {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--primary);
}

.cert-item.tier-top .cert-issuer {
    font-size: 0.7rem;
    color: #6366f1;
    display: block;
    line-height: 1.2;
}

.cert-item.tier-cisco {
    background: var(--gray-light);
    border-color: var(--border);
}

.cert-item.tier-cisco .cert-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #1d4ed8;
    flex-shrink: 0;
}

.cert-item.tier-cisco .cert-name {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--ink2);
}

.cert-item.tier-cisco .cert-issuer {
    font-size: 0.68rem;
    color: var(--ink3);
    display: block;
}

.cert-item.tier-other {
    background: var(--gray-light);
    border-color: var(--border);
}

.cert-item.tier-other .cert-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--ink3);
    flex-shrink: 0;
}

.cert-item.tier-other .cert-name {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--ink2);
}

.cert-item.tier-other .cert-issuer {
    font-size: 0.68rem;
    color: var(--ink3);
    display: block;
}

/* ===========================
   POST LAYOUT
   =========================== */
.post-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 2rem;
    align-items: start;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--ink3);
    margin-bottom: 1.5rem;
    text-decoration: none;
    transition: color 0.2s;
}

.back-link:hover {
    color: var(--primary);
    text-decoration: none;
}

.post-container {
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    overflow: hidden;
}

/* Cover image — solo se presente */
.post-cover {
    width: 100%;
    max-height: 280px;
    overflow: hidden;
}

.post-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.post-header {
    padding: 2rem 2rem 1.5rem;
}

.post-cat {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--primary);
    background: var(--primary-light);
    padding: 3px 10px;
    border-radius: 20px;
    display: inline-block;
    margin-bottom: 1rem;
}

.post-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--ink);
    line-height: 1.2;
    letter-spacing: -0.5px;
    margin-bottom: 1.25rem;
}

.post-byline {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.byline-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--primary-light);
    border: 2px solid #b8d0f5;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.85rem;
    color: var(--primary);
    flex-shrink: 0;
}

.byline-name {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--ink);
    display: block;
}

.byline-meta {
    font-size: 0.78rem;
    color: var(--ink3);
}

/* ===========================
   POST BODY — TIPOGRAFIA
   =========================== */
.post-body {
    padding: 1.75rem 2rem 2rem;
}

.post-body p {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--ink2);
    margin-bottom: 1.5rem;
}

.post-body h2 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--ink);
    margin: 2.25rem 0 0.9rem;
    letter-spacing: -0.3px;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-light);
}

.post-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--ink);
    margin: 1.75rem 0 0.6rem;
}

.post-body ul,
.post-body ol {
    margin: 0 0 1.5rem 1.25rem;
}

.post-body li {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--ink2);
    margin-bottom: 0.3rem;
}

.post-body strong,
.post-body b {
    color: var(--ink);
    font-weight: 700;
}

.post-body em,
.post-body i {
    font-style: italic;
    color: var(--ink2);
}

.post-body blockquote {
    border-left: 3px solid var(--primary);
    padding: 1rem 1.25rem;
    margin: 1.75rem 0;
    background: var(--primary-light);
    border-radius: 0 8px 8px 0;
}

.post-body blockquote p {
    color: var(--ink);
    margin-bottom: 0;
    font-size: 0.95rem;
}

.post-body pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 1.25rem 1.5rem;
    border-radius: 8px;
    font-size: 0.875rem;
    line-height: 1.7;
    margin: 1.5rem 0;
    overflow-x: auto;
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
}

.post-body code {
    background: #f1f5f9;
    color: #0f172a;
    padding: 2px 7px;
    border-radius: 4px;
    font-size: 0.875em;
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
}

.post-body pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    font-size: inherit;
}

.post-body img {
    max-width: 100%;
    border-radius: 8px;
    margin: 1.5rem 0;
    border: 1px solid var(--border);
    display: block;
}

.post-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

/* Post footer */
.post-footer {
    padding: 1.25rem 2rem;
    border-top: 1px solid var(--border);
    background: var(--gray-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.tags {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.tag {
    padding: 4px 10px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--ink3);
    font-weight: 500;
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: var(--primary);
    color: var(--white) !important;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    transition: background 0.2s;
    text-decoration: none;
}

.btn-back:hover {
    background: var(--primary-dark);
    text-decoration: none;
}

/* ===========================
   SIDEBAR ARTICOLO
   =========================== */
.author-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.75rem;
}

.author-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-light);
    border: 2px solid #b8d0f5;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.1rem;
    color: var(--primary);
}

.author-name {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--ink);
}

.author-bio {
    font-size: 0.8rem;
    color: var(--ink3);
    line-height: 1.55;
}

.author-links {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 0.25rem;
}

.author-link {
    padding: 5px 12px;
    background: var(--primary-light);
    border: 1px solid #b8d0f5;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    transition: background 0.2s;
    text-decoration: none;
}

.author-link:hover {
    background: #d1e4fb;
    text-decoration: none;
}

.related-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
}

.related-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.related-item:first-child {
    padding-top: 0;
}

.related-cat {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 0.2rem;
}

.related-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.35;
    transition: color 0.2s;
    text-decoration: none;
    display: block;
}

.related-item:hover .related-title {
    color: var(--primary);
}

.related-date {
    font-size: 0.75rem;
    color: var(--ink3);
    margin-top: 0.2rem;
}

/* ===========================
   FOOTER
   =========================== */
.site-footer {
    text-align: center;
    padding: 2rem;
    font-size: 0.8rem;
    color: var(--ink3);
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 768px) {
    .home-layout,
    .post-layout {
        grid-template-columns: 1fr;
    }

    .hero-card {
        flex-direction: column;
        text-align: center;
    }

    .post-title {
        font-size: 1.4rem;
    }

    .post-body {
        padding: 1.25rem 1.25rem 1.5rem;
    }

    .post-header {
        padding: 1.5rem 1.25rem 1.25rem;
    }

    .post-footer {
        padding: 1rem 1.25rem;
        flex-direction: column;
        align-items: flex-start;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}