/* ═══════════════════════════════════════════
 * Chroma — Archivio Letture
 * chromablog.it
 * ═══════════════════════════════════════════ */

/* ── Tokens ── */
:root {
  --ch-accent: #0C8C9C;
  --ch-accent-hover: #0A7A88;
  --ch-accent-soft: rgba(12, 140, 156, 0.04);
  --ch-bg: #FAFAF7;
  --ch-surface: #FFF;
  --ch-ink: #181614;
  --ch-body: #42403C;
  --ch-mid: #6E6A64;
  --ch-mute: #9D998F;
  --ch-rule: #E2DED4;
  --ch-rule-light: #EDEAD2;

  --f-serif: 'Cormorant Garamond', 'Garamond', 'Georgia', serif;
  --f-sans: 'Inter', -apple-system, sans-serif;
  --f-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --sw: 1160px;
}

/* ── Base ── */
.ch-letture {
  background: var(--ch-bg);
  min-height: 100vh;
  font-family: var(--f-sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--ch-ink);
}

.ch-wrap {
  max-width: var(--sw);
  margin: 0 auto;
  padding-left: 36px;
  padding-right: 36px;
}

/* ── FadeIn ── */
.ch-fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s, transform 0.5s;
}
.ch-fade-in.ch-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Links ── */
.ch-link {
  color: inherit;
  text-decoration: none;
  display: block;
}
.ch-link:focus-visible {
  outline: none;
  box-shadow: 0 0 0 1.5px var(--ch-accent), 0 0 0 4px rgba(12, 140, 156, 0.12);
}

/* ── Labels (mono uppercase) ── */
.ch-label {
  font-family: var(--f-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.ch-label--accent { color: var(--ch-accent); }
.ch-label--mute   { color: var(--ch-mute); }
.ch-label--sm     { font-size: 8.5px; }

/* ── Meta (mono small) ── */
.ch-meta {
  font-family: var(--f-mono);
  font-size: 9.5px;
  color: var(--ch-mid);
  letter-spacing: 0.04em;
}
.ch-meta--sm { font-size: 8.5px; }


/* ═══════════════════════════════════════════
 * HEADER
 * ═══════════════════════════════════════════ */

.ch-header {
  padding-top: 48px;
}

.ch-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
}

.ch-title-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 8px;
}

.ch-page-title {
  font-family: var(--f-serif);
  font-weight: 300;
  font-size: 40px;
  letter-spacing: -0.02em;
  line-height: 1.06;
  color: var(--ch-ink);
  margin: 0;
}

.ch-subtitle {
  font-family: var(--f-serif);
  font-size: 18px;
  font-style: italic;
  color: var(--ch-mid);
  max-width: 520px;
  margin: 0 0 36px;
}


/* ═══════════════════════════════════════════
 * FILTERS
 * ═══════════════════════════════════════════ */

.ch-filters {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--ch-rule);
}

.ch-filter {
  background: none;
  border: none;
  border-bottom: 1.5px solid transparent;
  cursor: pointer;
  padding: 8px 4px;
  font-family: var(--f-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ch-mute);
  transition: all 0.2s;
}
.ch-filter:focus-visible {
  outline: none;
  box-shadow: 0 0 0 1.5px var(--ch-accent), 0 0 0 4px rgba(12, 140, 156, 0.12);
}
.ch-filter--active {
  color: var(--ch-accent);
  border-bottom-color: var(--ch-accent);
}


/* ═══════════════════════════════════════════
 * FEATURED CARD
 * ═══════════════════════════════════════════ */

.ch-featured-wrap {
  padding-top: 40px;
}

.ch-feat {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--ch-rule);
  transition: opacity 0.15s;
}
.ch-feat:hover { opacity: 0.8; }

.ch-feat__img {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: #E5E2DA;
}
.ch-feat__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.ch-feat__body {
  padding: 44px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--ch-surface);
}

.ch-feat__meta {
  display: flex;
  gap: 8px;
  align-items: center;
}

.ch-feat__title {
  font-family: var(--f-serif);
  font-weight: 300;
  font-size: 32px;
  letter-spacing: -0.02em;
  line-height: 1.06;
  margin: 16px 0 0;
}

.ch-feat__author {
  font-family: var(--f-serif);
  font-size: 14.5px;
  font-style: italic;
  color: var(--ch-accent);
  margin: 6px 0 0;
}

.ch-feat__desc {
  font-family: var(--f-sans);
  font-size: 14.5px;
  color: var(--ch-body);
  line-height: 1.85;
  margin: 20px 0 0;
  max-width: 360px;
}

.ch-feat__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
}

.ch-read-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--ch-accent);
  transition: transform 120ms;
  display: inline-block;
}
.ch-feat:hover .ch-read-link {
  transform: translateX(2px);
}


/* ═══════════════════════════════════════════
 * RICH CARDS
 * ═══════════════════════════════════════════ */

.ch-rich-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding-top: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--ch-rule);
}

.ch-rich {
  display: flex;
  gap: 18px;
  padding: 12px 0;
  transition: opacity 0.12s;
}
.ch-rich:hover { opacity: 0.7; }

.ch-rich__img {
  width: 90px;
  height: 120px;
  flex-shrink: 0;
  overflow: hidden;
  background: #E5E2DA;
}
.ch-rich__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.ch-rich__meta {
  display: flex;
  gap: 6px;
}

.ch-rich__title {
  font-family: var(--f-serif);
  font-size: 19px;
  font-weight: 400;
  margin: 6px 0 0;
  line-height: 1.1;
  color: var(--ch-ink);
}

.ch-rich__author {
  font-family: var(--f-serif);
  font-size: 13px;
  font-style: italic;
  color: var(--ch-accent);
  margin: 3px 0 0;
}

.ch-rich__desc {
  font-family: var(--f-sans);
  font-size: 12px;
  color: var(--ch-body);
  line-height: 1.6;
  margin: 6px 0 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ch-rich__footer {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}


/* ═══════════════════════════════════════════
 * TOOLBAR (Search + Sort)
 * ═══════════════════════════════════════════ */

.ch-index-wrap {
  padding-bottom: 64px;
}

.ch-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  margin-bottom: 20px;
}

.ch-toolbar__controls {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.ch-search {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--ch-ink);
  background: transparent;
  border: 1px solid var(--ch-rule);
  padding: 5px 12px;
  width: 180px;
  transition: border-color 0.2s;
}
.ch-search:focus {
  outline: none;
  border-color: var(--ch-accent);
  box-shadow: none;
}
.ch-search:focus-visible {
  outline: none;
  border-color: var(--ch-accent);
  box-shadow: 0 0 0 3px rgba(12, 140, 156, 0.08);
}

.ch-sort {
  display: flex;
  gap: 4px;
}

.ch-sort-btn {
  background: none;
  border: none;
  border-bottom: 1px solid transparent;
  cursor: pointer;
  padding: 6px 4px;
  font-family: var(--f-mono);
  font-size: 8.5px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ch-mute);
  transition: all 0.2s;
}
.ch-sort-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 1.5px var(--ch-accent), 0 0 0 4px rgba(12, 140, 156, 0.12);
}
.ch-sort-btn--active {
  color: var(--ch-accent);
  border-bottom-color: var(--ch-accent);
}


/* ═══════════════════════════════════════════
 * INDEX ROWS
 * ═══════════════════════════════════════════ */

.ch-row {
  display: flex;
  gap: 20px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--ch-rule-light);
  transition: background 0.12s;
}
.ch-row:hover {
  background: var(--ch-accent-soft);
}

.ch-row__num {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--ch-accent);
  min-width: 28px;
  opacity: 0.6;
  transition: opacity 0.2s;
}
.ch-row:hover .ch-row__num { opacity: 1; }

.ch-row__main {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 16px;
}

.ch-row__title {
  font-family: var(--f-serif);
  font-size: 18px;
  font-weight: 400;
  color: var(--ch-ink);
  line-height: 1.15;
  flex: 1;
  transition: color 0.2s;
}
.ch-row:hover .ch-row__title { color: var(--ch-accent); }

.ch-row__author {
  font-family: var(--f-serif);
  font-size: 13px;
  font-style: italic;
  color: var(--ch-mid);
  flex-shrink: 0;
}

.ch-row__meta {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-shrink: 0;
}

.ch-row__arrow {
  font-size: 11px;
  font-weight: 600;
  color: var(--ch-accent);
  opacity: 0;
  transition: opacity 0.2s;
}
.ch-row:hover .ch-row__arrow { opacity: 1; }


/* ═══════════════════════════════════════════
 * EMPTY STATE
 * ═══════════════════════════════════════════ */

.ch-empty {
  padding-top: 56px;
  padding-bottom: 56px;
  text-align: center;
}
.ch-empty__text {
  font-family: var(--f-serif);
  font-size: 16px;
  font-style: italic;
  color: var(--ch-mute);
  margin: 0;
}


/* ═══════════════════════════════════════════
 * RESPONSIVE — Tablet (768–959)
 * ═══════════════════════════════════════════ */

@media (max-width: 959px) and (min-width: 768px) {
  .ch-feat {
    grid-template-columns: 1fr 1fr;
  }
  .ch-feat__img {
    aspect-ratio: 3 / 4;
  }
  .ch-feat__body {
    padding: 28px 24px;
  }
  .ch-feat__title {
    font-size: 26px;
  }
}


/* ═══════════════════════════════════════════
 * RESPONSIVE — Mobile (<768)
 * ═══════════════════════════════════════════ */

@media (max-width: 767px) {
  .ch-wrap {
    padding-left: 20px;
    padding-right: 20px;
  }

  .ch-header {
    padding-top: 32px;
  }
  .ch-breadcrumb { margin-bottom: 20px; }
  .ch-page-title { font-size: 30px; }
  .ch-subtitle { font-size: 16px; margin-bottom: 24px; }

  .ch-filters {
    gap: 10px;
    padding-bottom: 24px;
  }
  .ch-filter { font-size: 9px; }

  /* Featured */
  .ch-featured-wrap { padding-top: 28px; }
  .ch-feat {
    grid-template-columns: 1fr;
    padding-bottom: 24px;
  }
  .ch-feat__img { aspect-ratio: 3 / 2; }
  .ch-feat__body {
    padding: 20px 0;
    background: transparent;
  }
  .ch-feat__title { font-size: 24px; }
  .ch-feat__author { font-size: 13px; }

  /* Rich */
  .ch-rich-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-top: 24px;
    padding-bottom: 24px;
  }
  .ch-rich__img { width: 80px; height: 106px; }
  .ch-rich__title { font-size: 16px; }

  /* Toolbar */
  .ch-toolbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding-top: 20px;
  }
  .ch-toolbar__controls { gap: 10px; }
  .ch-search { width: 160px; }
  .ch-index-wrap { padding-bottom: 48px; }

  /* Rows */
  .ch-row { gap: 12px; padding: 14px 0; }
  .ch-row__main {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }
  .ch-row__title { font-size: 16px; }
  .ch-row__pub { display: none; }
  .ch-row__arrow { display: none; }
}