/* MetriTek Blog — design system allineato a metritek.it */

:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #EFF6FF;
  --indigo: #4F46E5;
  --accent: #F59E0B;
  --success: #10B981;
  --danger: #EF4444;
  --dark: #0A0F1E;
  --dark-800: #111827;
  --dark-700: #1F2937;
  --gray-400: #9CA3AF;
  --gray-300: #D1D5DB;
  --gray-200: #E5E7EB;
  --gray-100: #F3F4F6;
  --gray-50: #F9FAFB;
  --text: #111827;
  --text-muted: #6B7280;
  --white: #FFFFFF;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 4px 16px rgba(0,0,0,.10);
  --shadow-lg: 0 20px 48px rgba(0,0,0,.14);
  --transition: .2s ease;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --navbar-h: 68px;
  --navbar-offset: calc(var(--navbar-h) + env(safe-area-inset-top, 0px));
  --content: 760px;
  --container: 1140px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: var(--navbar-offset);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap;
}
.skip-link:focus {
  position: fixed; top: 12px; left: 12px; z-index: 1000;
  width: auto; height: auto; clip: auto;
  background: var(--primary); color: #fff; padding: 10px 16px;
  border-radius: var(--radius-sm); font-weight: 600;
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container--narrow { max-width: calc(var(--content) + 48px); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius-sm); font-weight: 600;
  font-size: 15px; transition: var(--transition); border: none; cursor: pointer;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(37,99,235,.35);
}
.btn-outline {
  background: transparent; color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: #BFDBFE; color: var(--primary-dark); }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-lg { padding: 16px 32px; font-size: 16px; border-radius: var(--radius); }

.badge {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: .4px;
}
.badge-blue { background: var(--primary-light); color: var(--primary); }

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(37,99,235,.1); color: #1D4ED8;
  padding: 5px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: .3px;
  margin-bottom: 12px; text-transform: uppercase;
}

/* Navbar */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding-top: env(safe-area-inset-top, 0px);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow); }
.navbar__inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--navbar-h); gap: 16px;
}
.navbar__logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 20px; color: var(--primary);
  flex-shrink: 0;
}
.navbar__logo img,
.navbar__logo .custom-logo {
  height: 40px; width: auto; max-width: 180px;
}
.navbar__logo-badge {
  font-size: 11px; font-weight: 700; letter-spacing: .4px;
  text-transform: uppercase; color: var(--primary);
  background: var(--primary-light); padding: 4px 8px;
  border-radius: 999px;
}
.navbar__nav {
  display: flex; align-items: center; gap: 2px;
}
.navbar__link {
  position: relative; white-space: nowrap;
  padding: 8px 11px; border-radius: 999px;
  font-size: 13.5px; font-weight: 500; color: var(--text-muted);
  transition: color .2s ease, background .2s ease;
}
.navbar__link::after {
  content: ''; position: absolute; left: 11px; right: 11px; bottom: 4px;
  height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--indigo));
  transform: scaleX(0); transform-origin: left; transition: transform .22s ease;
}
.navbar__link:hover { color: var(--primary); }
.navbar__link:hover::after { transform: scaleX(1); }
.navbar__link.active {
  color: var(--primary); background: var(--primary-light); font-weight: 600;
}
.navbar__link.active::after { transform: scaleX(1); }
.navbar__actions { display: flex; align-items: center; gap: 10px; }
.navbar__toggle { display: none; padding: 8px; color: var(--text); border-radius: var(--radius-sm); }
.mobile-nav {
  display: none; border-top: 1px solid var(--gray-200);
  background: #fff; padding: 16px 0 24px;
}
.mobile-nav__list { display: flex; flex-direction: column; gap: 4px; margin-bottom: 16px; }
.mobile-nav__list a {
  display: block; padding: 12px 14px; border-radius: 10px;
  font-weight: 500; color: var(--text-muted);
}
.mobile-nav__list a:hover,
.mobile-nav__list .current-menu-item > a {
  background: var(--primary-light); color: var(--primary);
}
.mobile-nav__cta { width: 100%; }

/* Blog hero */
.blog-hero {
  background: linear-gradient(100deg, #243252 0%, #2B3C60 45%, var(--dark) 72%);
  color: #fff;
  padding: 64px 0 56px;
  position: relative;
  overflow: hidden;
}
.blog-hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 85% 20%, rgba(37,99,235,.35), transparent 60%),
    radial-gradient(ellipse 40% 50% at 10% 90%, rgba(79,70,229,.2), transparent 55%);
  pointer-events: none;
}
.blog-hero .container { position: relative; z-index: 1; }
.blog-hero--compact { padding: 48px 0 40px; }
.blog-hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .4px;
  text-transform: uppercase; color: #93C5FD; margin-bottom: 14px;
}
.blog-hero__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800; line-height: 1.15; letter-spacing: -.02em;
  max-width: 18ch; color: #fff;
}
.blog-hero__lead {
  margin-top: 16px; font-size: 1.0625rem; line-height: 1.65;
  color: #DCE7FF; max-width: 42ch;
}

/* Listing */
.blog-listing { padding: 56px 0 72px; background: var(--gray-50); }
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}
.post-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 14px;
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  box-shadow: var(--shadow-sm);
}
.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: #BFDBFE;
}
.post-card__media {
  display: block; aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
  overflow: hidden;
}
.post-card__img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .35s ease;
}
.post-card:hover .post-card__img { transform: scale(1.04); }
.post-card__placeholder {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); opacity: .45;
}
.post-card__body { padding: 22px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.post-card__title {
  font-size: 1.125rem; font-weight: 700; line-height: 1.35;
  letter-spacing: -.01em; margin-bottom: 10px;
}
.post-card__title a:hover { color: var(--primary); }
.post-card__excerpt {
  font-size: 14.5px; color: var(--text-muted); line-height: 1.6;
  flex: 1; margin-bottom: 16px;
}
.post-card__meta {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--gray-400); font-weight: 500;
}
.single-meta__dot {
  width: 3px; height: 3px; border-radius: 50%; background: var(--gray-300);
}

/* Pagination */
.navigation.pagination {
  margin-top: 48px; display: flex; justify-content: center;
}
.nav-links { display: flex; gap: 8px; flex-wrap: wrap; }
.page-numbers {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 40px; height: 40px; padding: 0 12px;
  border-radius: var(--radius-sm); font-weight: 600; font-size: 14px;
  color: var(--text-muted); background: #fff; border: 1px solid var(--gray-200);
}
.page-numbers.current,
.page-numbers:hover {
  background: var(--primary); color: #fff; border-color: var(--primary);
}

/* Single */
.single-hero { padding: 48px 0 28px; }
.single-hero__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800; line-height: 1.2; letter-spacing: -.02em;
  margin-top: 4px;
}
.single-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  margin-top: 18px; font-size: 14px; color: var(--text-muted); font-weight: 500;
}
.single-thumb { margin: 0 auto 36px; }
.single-thumb__img {
  width: 100%; border-radius: 14px;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow);
}

.entry-content {
  font-size: 1.0625rem; line-height: 1.8; color: var(--dark-700);
  padding-bottom: 40px;
}
.entry-content > * + * { margin-top: 1.25em; }
.entry-content h2,
.entry-content h3,
.entry-content h4 {
  color: var(--text); font-weight: 700; letter-spacing: -.015em;
  line-height: 1.25; margin-top: 1.75em;
}
.entry-content h2 { font-size: 1.5rem; }
.entry-content h3 { font-size: 1.25rem; }
.entry-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.entry-content a:hover { color: var(--primary-dark); }
.entry-content ul,
.entry-content ol { padding-left: 1.25em; }
.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }
.entry-content li + li { margin-top: .4em; }
.entry-content blockquote {
  border-left: 3px solid var(--primary);
  background: var(--primary-light);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--dark-700); font-weight: 500;
}
.entry-content code {
  font-size: .9em; background: var(--gray-100); padding: 2px 6px;
  border-radius: 4px;
}
.entry-content pre {
  background: var(--dark-800); color: #E5E7EB;
  padding: 18px 20px; border-radius: var(--radius); overflow-x: auto;
}
.entry-content img { border-radius: var(--radius); margin: 1.5em auto; }
.entry-content figure { margin: 1.75em 0; }
.entry-content figcaption {
  text-align: center; font-size: 13px; color: var(--text-muted); margin-top: 8px;
}

.single-footer { padding: 8px 0 56px; border-top: 1px solid var(--gray-200); }
.single-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 24px 0 32px; }
.post-nav {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.post-nav a {
  display: block; padding: 16px 18px;
  border: 1px solid var(--gray-200); border-radius: var(--radius);
  background: #fff; font-weight: 600; font-size: 14px; line-height: 1.4;
  transition: var(--transition);
}
.post-nav a:hover { border-color: #BFDBFE; color: var(--primary); box-shadow: var(--shadow-sm); }
.post-nav__next { text-align: right; }

/* Comments */
.comments-area {
  padding: 32px 0 64px;
  border-top: 1px solid var(--gray-200);
}
.comments-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 24px; }
.comment-list { margin-bottom: 32px; }
.comment-body {
  padding: 18px 0; border-bottom: 1px solid var(--gray-100);
}
.comment-author { font-weight: 700; }
.comment-meta { font-size: 13px; color: var(--text-muted); margin: 4px 0 10px; }
.comment-form label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm); font: inherit; margin-bottom: 14px;
}
.comment-form input:focus,
.comment-form textarea:focus {
  outline: 2px solid var(--primary); outline-offset: 1px; border-color: transparent;
}
.comment-form .submit {
  background: var(--primary); color: #fff; border: none;
  padding: 12px 22px; border-radius: var(--radius-sm); font-weight: 600; cursor: pointer;
}

/* CTA band */
.blog-cta {
  background: linear-gradient(100deg, #243252 0%, #2B3C60 50%, var(--dark) 100%);
  padding: 48px 0;
}
.blog-cta__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 28px; flex-wrap: wrap;
}
.blog-cta h2 {
  color: #fff; font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 800; letter-spacing: -.02em; max-width: 22ch;
}
.blog-cta p {
  margin-top: 8px; color: #DCE7FF; font-size: 15px; max-width: 42ch;
}

/* Empty */
.empty-state {
  text-align: center; padding: 64px 24px;
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: 14px;
}
.empty-state h2 { font-size: 1.5rem; font-weight: 800; margin-bottom: 8px; }
.empty-state p { color: var(--text-muted); margin-bottom: 24px; }

/* Search form */
.search-form { display: flex; gap: 8px; }
.search-form__input {
  flex: 1; padding: 10px 14px; border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm); font: inherit;
}

/* Footer */
.footer {
  background: var(--dark-800); color: rgba(255,255,255,.6);
  padding: 60px 0 32px;
}
.footer__grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 48px;
}
.footer__brand-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 800; color: white; margin-bottom: 12px;
}
.footer__brand-desc { font-size: 13px; line-height: 1.7; max-width: 32ch; }
.footer__col h3 {
  font-size: 13px; font-weight: 700; color: white;
  text-transform: uppercase; letter-spacing: .5px; margin-bottom: 16px;
}
.footer__link {
  display: block; font-size: 14px; padding: 4px 0;
  transition: color var(--transition);
}
.footer__link:hover { color: white; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  column-gap: 24px; row-gap: 6px; align-items: start;
}
.footer__copy { font-size: 13px; grid-column: 1; grid-row: 1; }
.footer__bottom > span:not(.footer__copy) {
  grid-column: 1; grid-row: 2; font-size: 12.5px; color: #9CA3AF;
  line-height: 1.45; max-width: 36em;
}
.footer__legal {
  display: flex; flex-wrap: wrap; gap: 12px 20px;
  grid-column: 2; grid-row: 1 / span 2;
  align-self: center; justify-content: flex-end;
}
.footer__legal .footer__link { display: inline; padding: 0; font-size: 13px; }

/* WP admin bar */
body.admin-bar .navbar { top: 32px; }
@media screen and (max-width: 782px) {
  body.admin-bar .navbar { top: 46px; }
}

/* Responsive */
@media (max-width: 980px) {
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .navbar__nav-wrap { display: none; }
  .navbar__link--site { display: none; }
  .navbar__toggle { display: inline-flex; }
  .mobile-nav { display: block; }
  .mobile-nav[hidden] { display: none !important; }
}
@media (max-width: 640px) {
  .post-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: 28px; }
  .footer__bottom { grid-template-columns: 1fr; }
  .footer__legal { grid-column: 1; grid-row: 3; justify-content: flex-start; margin-top: 8px; }
  .post-nav { grid-template-columns: 1fr; }
  .blog-cta__inner { flex-direction: column; align-items: flex-start; }
  .navbar__actions .btn { display: none; }
}