/* ==========================================================================
   INTERFERENCE — Design System
   Helvetica + pillole pastello. Minimale, veloce, senza elementi superflui.
   ========================================================================== */

:root {
  /* Pastel category palette (badges, pills, cards) */
  --color-music: #F0FF99;
  --color-cities: #FFC2E8;
  --color-society: #C2FFC6;
  --color-ideas: #C2B9FF;

  /* Saturated variants (article quote accents only — need contrast) */
  --accent-music: #B0C400;
  --accent-cities: #E6008A;
  --accent-society: #34A853;
  --accent-ideas: #6C4FE0;

  --black: #111111;
  --white: #FFFFFF;
  --grey-1: #6B6B6B;
  --grey-2: #ADADAD;
  --grey-3: #E5E5E5;
  --grey-4: #F5F5F5;

  --font: "Helvetica Neue", Helvetica, Arial, "Segoe UI", sans-serif;

  --max-width: 1600px;
  --gutter: 160px;      /* page margin, per Figma spec */
  --col-gutter: 30px;   /* 3-column grid gutter, per Figma spec */
  --radius: 0px;
}

@media (max-width: 1180px) {
  :root { --gutter: 64px; }
}
@media (max-width: 860px) {
  :root { --gutter: 32px; }
}
@media (max-width: 640px) {
  :root { --gutter: 20px; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--black);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  line-height: 1.4;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ------------------------------ HEADER ------------------------------ */

.site-header {
  padding: 44px var(--gutter) 8px;
}

.site-header .wrap {
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.logo {
  font-family: "Helvetica Now Display", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 76px;
  font-weight: 900;
  letter-spacing: -3px;
  text-transform: lowercase;
  line-height: 1;
}

.logo a { display: block; }

@media (max-width: 620px) {
  .logo { font-size: 44px; letter-spacing: -2px; }
}

.tagline {
  display: none;
}

/* --------------------------- CATEGORY FILTER --------------------------- */

.filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 24px var(--gutter) 40px;
}

.filter-pill {
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--grey-4);
  color: var(--black);
  font-family: var(--font);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 12px 22px;
  cursor: pointer;
  transition: transform 0.12s ease, filter 0.12s ease;
}

.filter-pill:hover { transform: translateY(-1px); }

.filter-pill[data-cat="all"] { background: var(--black); color: var(--white); }
.filter-pill[data-cat="all"].active { filter: brightness(1.3); }

/* categorie: solo contorno colorato finché non sono selezionate */
.filter-pill[data-cat="music"] { background: transparent; border-color: var(--color-music); }
.filter-pill[data-cat="cities"] { background: transparent; border-color: var(--color-cities); }
.filter-pill[data-cat="society"] { background: transparent; border-color: var(--color-society); }
.filter-pill[data-cat="ideas"] { background: transparent; border-color: var(--color-ideas); }

.filter-pill[data-cat="music"].active { background: var(--color-music); }
.filter-pill[data-cat="cities"].active { background: var(--color-cities); }
.filter-pill[data-cat="society"].active { background: var(--color-society); }
.filter-pill[data-cat="ideas"].active { background: var(--color-ideas); }

/* Distraction-free toggle (distinct from category pills) */

.dfree-toggle {
  background: var(--grey-4);
  color: var(--black);
}

.dfree-toggle.active {
  background: var(--black);
  color: var(--white);
}

/* ------------------------------ GRID (list layout) ------------------------------ */

.grid {
  display: flex;
  flex-direction: column;
  gap: 48px;
  padding: 4px var(--gutter) 40px;
}

/* ------------------------------ CARD (3-col grid: image col 1, text col 2-3) ------------------------------ */

.card {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: var(--col-gutter);
  align-items: start;
  cursor: pointer;
}

@media (max-width: 640px) {
  .card { display: block; }
}

.card-image {
  position: relative;
  grid-column: 1 / 2;
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--grey-4);
  border-radius: var(--radius);
}

@media (max-width: 640px) {
  .card-image { width: 100%; height: 220px; margin-bottom: 20px; }
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.card:hover .card-image img { transform: scale(1.04); }

.card-content {
  grid-column: 2 / 4;
  min-width: 0;
}

.card-category {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 5px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--black);
}

.card[data-cat="music"] .card-category { background: var(--color-music); }
.card[data-cat="cities"] .card-category { background: var(--color-cities); }
.card[data-cat="society"] .card-category { background: var(--color-society); }
.card[data-cat="ideas"] .card-category { background: var(--color-ideas); }

.card-date {
  display: block;
  margin-top: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--grey-2);
}

.card-title {
  max-width: 380px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  margin: 8px 0 8px;
  letter-spacing: -0.2px;
}

.card-desc {
  max-width: 415px;
  font-size: 14px;
  font-weight: 400;
  color: var(--grey-1);
  line-height: 1.5;
  margin: 0 0 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 640px) {
  .card-title, .card-desc { max-width: none; }
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--grey-1);
}

.card-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--grey-3);
  overflow: hidden;
  flex-shrink: 0;
}

.card-avatar img { width: 100%; height: 100%; object-fit: cover; }

/* ------------------------- DISTRACTION-FREE MODE ------------------------- */

body.distraction-free .card-image,
body.distraction-free .card-avatar,
body.distraction-free .article-hero,
body.distraction-free .article-image-block,
body.distraction-free .article-gallery,
body.distraction-free .embed-wrap,
body.distraction-free .embed-instagram,
body.distraction-free .embed-map,
body.distraction-free .related-image {
  display: none !important;
}

body.distraction-free .related-category {
  background: var(--grey-4) !important;
  border-color: transparent;
  color: var(--black) !important;
}

/* senza immagine, il testo si allinea al margine sinistro della pagina */
body.distraction-free .card-content {
  grid-column: 1 / 4;
}

body.distraction-free .card-category,
body.distraction-free .article-category {
  background: var(--grey-4) !important;
  border-color: transparent;
  color: var(--black) !important;
}

body.distraction-free .filter-pill:not([data-cat="all"]):not(.dfree-toggle) {
  background: transparent;
  border-color: var(--black);
  color: var(--black);
}

body.distraction-free .filter-pill:not([data-cat="all"]):not(.dfree-toggle).active {
  background: var(--grey-4);
}

body.distraction-free .article-quote {
  border-left-color: var(--black) !important;
}

/* --------------------------- PAGINATION --------------------------- */

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 20px var(--gutter) 60px;
}

.page-numbers {
  display: flex;
  gap: 8px;
}

.page-num {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--grey-4);
  color: var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

.page-num.active {
  background: var(--black);
  color: var(--white);
}

.page-btn {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--grey-4);
}

.page-btn.disabled {
  color: var(--grey-2);
  pointer-events: none;
}

/* ------------------------------ FOOTER ------------------------------ */

.site-footer {
  border-top: 1px solid var(--grey-3);
  padding: 30px var(--gutter);
  margin-top: 20px;
  font-size: 12px;
  color: var(--grey-1);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ============================ ARTICLE PAGE ============================ */

.article-back {
  display: inline-block;
  padding: 16px var(--gutter) 0;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.article-hero {
  width: 100%;
  max-height: 640px;
  overflow: hidden;
  margin-top: 14px;
  border-radius: var(--radius);
}

.article-hero img { width: 100%; height: 100%; object-fit: cover; }

.article-head {
  max-width: 820px;
  margin: 0 auto;
  padding: 36px var(--gutter) 10px;
}

.article-category {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 5px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--black);
  margin-bottom: 18px;
}

.article-category.music { background: var(--color-music); }
.article-category.cities { background: var(--color-cities); }
.article-category.society { background: var(--color-society); }
.article-category.ideas { background: var(--color-ideas); }

.article-title {
  font-size: 46px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -1px;
  margin: 0 0 16px;
}

@media (max-width: 620px) {
  .article-title { font-size: 32px; }
}

.article-subtitle {
  font-size: 19px;
  color: var(--grey-1);
  line-height: 1.4;
  margin: 0 0 22px;
  font-weight: 400;
}

.article-byline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  border-top: 1px solid var(--grey-3);
  border-bottom: 1px solid var(--grey-3);
  padding: 14px 0;
  margin-bottom: 10px;
}

.article-author {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.article-date {
  font-size: 13px;
  font-weight: 700;
  color: var(--grey-1);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

/* Share bar */

.share-bar {
  display: flex;
  gap: 8px;
  flex-wrap: nowrap;
}

.share-btn {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--grey-4);
  color: var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
}

.share-btn svg { width: 17px; height: 17px; display: block; }

.share-btn:hover { background: var(--black); color: var(--white); }

/* Article body */

.article-body {
  max-width: 820px;
  margin: 0 auto;
  padding: 10px var(--gutter) 60px;
  font-size: 19px;
  line-height: 1.7;
}

.article-body p { margin: 0 0 24px; }

.article-body .lead {
  font-size: 22px;
  font-weight: 400;
}

.article-preface {
  font-style: italic;
  color: var(--grey-1);
  border-top: 1px solid var(--grey-3);
  border-bottom: 1px solid var(--grey-3);
  padding: 28px 0;
  margin: 8px 0 40px;
}

.article-preface p { margin: 0 0 16px; }
.article-preface p:last-child { margin-bottom: 0; }

.article-preface-label {
  display: block;
  font-style: normal;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--grey-2);
  margin-bottom: 14px;
}

body.distraction-free .article-preface {
  border-color: var(--grey-3);
}

.article-quote {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin: 46px 0;
  padding-left: 24px;
  border-left: 6px solid var(--accent, var(--black));
}

.article-quote cite {
  display: block;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 400;
  color: var(--grey-1);
  font-style: normal;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.article-image-block { margin: 40px 0; }
.article-image-block img { width: 100%; border-radius: var(--radius); }
.article-image-block .caption {
  font-size: 13px;
  color: var(--grey-1);
  margin-top: 8px;
}

.article-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 40px 0;
}

@media (max-width: 620px) {
  .article-gallery { grid-template-columns: 1fr; }
}

.embed-wrap {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  margin: 40px 0;
  background: var(--grey-4);
  border-radius: var(--radius);
  overflow: hidden;
}

.embed-wrap iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  border: 0;
}

.embed-instagram, .embed-map {
  margin: 40px 0;
}

.embed-instagram iframe { width: 100%; min-height: 600px; border: 1px solid var(--grey-3); border-radius: var(--radius); }

.embed-map iframe { width: 100%; height: 420px; border: 0; border-radius: var(--radius); filter: grayscale(15%); }

.article-tags {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 var(--gutter) 60px;
  font-size: 12px;
  color: var(--grey-1);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

/* --------------------------- RELATED ARTICLES --------------------------- */

.related-articles {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px var(--gutter) 60px;
  border-top: 1px solid var(--grey-3);
}

.related-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--grey-1);
  margin: 0 0 28px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.related-card {
  display: block;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}

.related-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--grey-4);
  border-radius: var(--radius);
}

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

.related-category {
  display: inline-block;
  margin-top: 16px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 5px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--black);
}

.related-category.music { background: var(--color-music); }
.related-category.cities { background: var(--color-cities); }
.related-category.society { background: var(--color-society); }
.related-category.ideas { background: var(--color-ideas); }

.related-card-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.2px;
  margin: 10px 0 0;
}

.related-card:hover .related-card-title { text-decoration: underline; }

@media (max-width: 860px) {
  .related-grid { grid-template-columns: 1fr; gap: 24px; }
}