/* ============================================================
   BOLETÍN DE ACTUALIDAD QUÍMICA
   Responsabilidad Integral Colombia
   Paleta: Pantone 300C #0057A8 + Pantone 7724C #1B7B4D
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700&family=DM+Sans:wght@400;500;600&family=DM+Mono:wght@400;500&display=swap');

:root {
  --navy:        #0a2d5e;
  --blue:        #0057A8;
  --blue-mid:    #1a4a8a;
  --teal:        #00b89a;
  --green:       #1B7B4D;
  --green-light: #279660;
  --ivory:       #f5f3ef;
  --white:       #ffffff;
  --ink:         #12243e;
  --ink-mid:     #3a4a62;
  --ink-light:   #6b7a92;
  --border:      #dde2ed;
  --border-dark: #c0cbdc;
  --tinted:      #eef1f8;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;

  --shadow-sm: 0 1px 3px rgba(10,45,94,0.08), 0 1px 2px rgba(10,45,94,0.05);
  --shadow-md: 0 4px 16px rgba(10,45,94,0.10), 0 2px 6px rgba(10,45,94,0.06);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --max-width:  860px;
  --transition: 200ms ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--ivory);
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ── Utilidades ── */
.container { max-width: var(--max-width); margin-inline: auto; padding-inline: 1.5rem; }
@media (max-width: 600px) { .container { padding-inline: 1rem; } }

/* ── Header de navegación ── */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding-block: 1rem;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.site-header .logo img { height: 40px; width: auto; }
.header-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-light);
  text-align: right;
  line-height: 1.5;
}
.header-label strong {
  display: block;
  color: var(--green);
}

/* ── Portada de edición ── */
.edition-hero {
  background: linear-gradient(135deg, var(--navy) 0%, #0d4d8a 55%, #0a5c4a 100%);
  color: var(--white);
  padding-block: 3rem 2.5rem;
}
.edition-hero .container {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: end;
}
.edition-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.edition-eyebrow::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 1px;
  background: currentColor;
}
.edition-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}
.edition-subtitle {
  font-size: 1rem;
  color: rgba(255,255,255,0.68);
  max-width: 540px;
  line-height: 1.65;
}
.edition-meta {
  text-align: right;
  flex-shrink: 0;
}
.edition-num {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1;
  color: rgba(255,255,255,0.12);
}
.edition-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 0.25rem;
}
@media (max-width: 580px) {
  .edition-hero .container { grid-template-columns: 1fr; }
  .edition-meta { text-align: left; }
}

/* ── Barra de categorías ── */
.categories-bar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding-block: 0.75rem;
  position: sticky;
  top: 0;
  z-index: 10;
}
.categories-bar .container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.cat-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--ink-mid);
  background: var(--white);
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition);
  white-space: nowrap;
}
.cat-pill:hover,
.cat-pill.active {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}
.cat-pill[data-cat="Responsible Care"].active    { background: #1B7B4D; border-color: #1B7B4D; }
.cat-pill[data-cat="Seguridad de Procesos"].active { background: #c0392b; border-color: #c0392b; }
.cat-pill[data-cat="Regulación Colombia"].active  { background: #0057A8; border-color: #0057A8; }
.cat-pill[data-cat="Sostenibilidad"].active       { background: #279660; border-color: #279660; }

/* ── Contenido principal ── */
.boletin-body { padding-block: 2.5rem; }

.noticias-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* ── Tarjeta de noticia ── */
.noticia-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition),
              transform var(--transition);
  position: relative;
  overflow: hidden;
}
.noticia-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--green);
  opacity: 0;
  transition: opacity var(--transition);
}
.noticia-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-dark);
  transform: translateX(2px);
}
.noticia-card:hover::before { opacity: 1; }

.noticia-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.noticia-categoria {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 100px;
  background: rgba(27,123,77,0.10);
  color: var(--green);
  border: 1px solid rgba(27,123,77,0.22);
  white-space: nowrap;
}
.noticia-categoria.cat-procesos   { background: rgba(192,57,43,0.08);  color: #c0392b;  border-color: rgba(192,57,43,0.22); }
.noticia-categoria.cat-colombia   { background: rgba(0,87,168,0.08);   color: var(--blue); border-color: rgba(0,87,168,0.22); }
.noticia-categoria.cat-intl       { background: rgba(10,45,94,0.07);   color: var(--navy); border-color: rgba(10,45,94,0.18); }
.noticia-categoria.cat-salud      { background: rgba(0,184,154,0.10);  color: #007a65;  border-color: rgba(0,184,154,0.25); }
.noticia-categoria.cat-industria  { background: rgba(26,74,138,0.08);  color: var(--blue-mid); border-color: rgba(26,74,138,0.2); }
.noticia-categoria.cat-rc         { background: rgba(27,123,77,0.10);  color: var(--green);    border-color: rgba(27,123,77,0.22); }
.noticia-categoria.cat-sostenib   { background: rgba(39,150,96,0.10);  color: var(--green-light); border-color: rgba(39,150,96,0.22); }
.noticia-categoria.cat-ri         { background: rgba(0,87,168,0.12);   color: var(--blue);     border-color: rgba(0,87,168,0.30); font-weight: 600; }

.noticia-fuente-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-light);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.noticia-fuente-meta .source-name {
  font-weight: 500;
  color: var(--ink-mid);
}

.noticia-card h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 0.6rem;
  letter-spacing: -0.01em;
}
.noticia-card p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ink-mid);
  margin-bottom: 1rem;
}
.noticia-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--green);
  border-bottom: 1px solid transparent;
  transition: gap var(--transition), border-color var(--transition);
}
.noticia-link:hover {
  gap: 0.55rem;
  border-bottom-color: var(--green);
}
.noticia-link svg { flex-shrink: 0; }

/* Tarjeta destacada */
.noticia-card--featured {
  border-color: rgba(27,123,77,0.3);
  background: linear-gradient(135deg, rgba(27,123,77,0.03) 0%, var(--white) 60%);
}
.noticia-card--featured::before { opacity: 1; background: var(--green); }
.noticia-card--featured h2 { font-size: 1.3rem; }

/* ── Separador de sección ── */
.section-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-block: 2rem 1.25rem;
}
.section-divider__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-light);
  white-space: nowrap;
}
.section-divider__line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Bloque CTA / nota del editor ── */
.editor-note {
  background: var(--tinted);
  border: 1px solid var(--border);
  border-left: 3px solid var(--blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1rem 1.25rem;
  margin-block: 2rem;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--ink-mid);
}
.editor-note strong { color: var(--blue); }

/* ── Navegación entre ediciones ── */
.edition-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 2rem;
  border-top: 1px solid var(--border);
  margin-top: 2.5rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.edition-nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--blue);
  transition: gap var(--transition);
}
.edition-nav a:hover { gap: 0.6rem; }
.edition-nav__archive {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-light);
  text-align: center;
}
.edition-nav__archive a { color: var(--green); font-size: inherit; }

/* ── Footer ── */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.55);
  padding-block: 2.5rem;
  margin-top: 2rem;
}
.site-footer .container {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
}
.footer-logo img { height: 36px; width: auto; margin-bottom: 0.75rem; }
.footer-tagline {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  line-height: 1.6;
  max-width: 320px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: right;
}
.footer-links a {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
  transition: color 150ms ease;
}
.footer-links a:hover { color: var(--white); }
.footer-bottom {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.72rem;
  color: rgba(255,255,255,0.25);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
@media (max-width: 560px) {
  .site-footer .container { grid-template-columns: 1fr; }
  .footer-links { text-align: left; }
}

/* ── Página de Archivo ── */
.archive-hero {
  background: var(--navy);
  color: var(--white);
  padding-block: 3rem;
}
.archive-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.archive-hero p {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.6);
}
.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  padding-block: 2.5rem;
}
.archive-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.archive-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--border-dark);
}
.archive-card__num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-light);
}
.archive-card__title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--blue);
  line-height: 1.25;
}
.archive-card__count {
  font-size: 0.8rem;
  color: var(--ink-light);
}
.archive-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--green);
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  transition: gap var(--transition);
}
.archive-card__link:hover { gap: 0.5rem; }

/* ── Animaciones ── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
.noticia-card { animation: fadeUp 0.4s ease both; }
.noticia-card:nth-child(2) { animation-delay: 0.05s; }
.noticia-card:nth-child(3) { animation-delay: 0.10s; }
.noticia-card:nth-child(4) { animation-delay: 0.15s; }
.noticia-card:nth-child(5) { animation-delay: 0.20s; }
.noticia-card:nth-child(6) { animation-delay: 0.25s; }
.noticia-card:nth-child(7) { animation-delay: 0.30s; }