/* ==========================================================================
   DERMATITES BLOG — revista digital de cuidado de la piel
   Sistema de diseño editorial · dermatis.mx
   ========================================================================== */

:root {
  /* Paleta — papel cálido, tinta bronce, verde profundo de acento */
  --paper:        #F3ECE2;
  --paper-2:      #FAF6EF;
  --champagne:    #C5AD8D;
  --stone:        #D8CCBD;
  --taupe:        #665A4C;
  --ink:          #3C342D;
  --forest:       #064013;
  --ink-60:       rgba(60, 52, 45, .60);
  --ink-40:       rgba(60, 52, 45, .40);
  --ink-14:       rgba(60, 52, 45, .14);
  --forest-60:    rgba(6, 64, 19, .60);

  /* Tipografía — tres voces: editorial, lectura, archivo */
  --serif:  "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans:   "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono:   "JetBrains Mono", "SFMono-Regular", Menlo, monospace;

  /* Ritmo vertical */
  --gutter: clamp(1.25rem, 4vw, 4rem);
  --masthead-h: 3.25rem;

  --ease-out: cubic-bezier(.22, 1, .36, 1);
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: clamp(.875rem, .82rem + .2vw, .9375rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--forest); color: var(--paper); }

img { display: block; max-width: 100%; height: auto; }

a {
  color: inherit;
  text-decoration: none;
  transition: opacity .35s ease;
}
a:hover { opacity: .55; }

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--forest);
  outline-offset: 3px;
  border-radius: 1px;
}

/* Imágenes con revelado suave (blur-up) */
.blur-up {
  filter: blur(14px);
  transform: scale(1.02);
  transition: filter .9s var(--ease-out), transform 1.2s var(--ease-out);
}
.blur-up.is-loaded {
  filter: blur(0);
  transform: scale(1);
}

/* Accesibilidad */
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: fixed; top: -100%; left: var(--gutter);
  z-index: 200; background: var(--ink); color: var(--paper);
  font-family: var(--mono); font-size: .75rem;
  padding: .6rem 1rem;
  transition: top .3s ease;
}
.skip-link:focus { top: .75rem; opacity: 1; }

/* --------------------------------------------------------------------------
   Cabecera tipo cabecera de periódico
   -------------------------------------------------------------------------- */

.masthead {
  position: sticky; top: 0; z-index: 100;
  background: rgba(243, 236, 226, .82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ink-14);
}

.masthead__meta {
  display: flex; justify-content: space-between; align-items: center;
  gap: 1rem;
  height: 2rem; padding: 0 var(--gutter);
  border-bottom: 1px solid var(--ink-14);
  font-family: var(--mono);
  font-size: .625rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--ink-60);
  white-space: nowrap; overflow: hidden;
}
.masthead__meta span:nth-child(2) { overflow: hidden; text-overflow: ellipsis; }

.masthead__main {
  display: flex; align-items: center; justify-content: space-between;
  gap: 2rem;
  height: calc(var(--masthead-h) + 1.75rem);
  padding: 0 var(--gutter);
}

.wordmark {
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(1.5rem, 2.6vw, 2.125rem);
  letter-spacing: .045em;
  line-height: 1;
  color: var(--ink);
}
.wordmark em {
  font-style: normal;
  color: var(--forest);
}
.wordmark__sub {
  display: block;
  font-family: var(--mono);
  font-size: .5625rem;
  font-weight: 400;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--ink-60);
  margin-top: .35rem;
}

/* Navegación — lista editorial con índices */
.nav { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2.25rem); }

.nav a {
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink);
  display: inline-flex; align-items: baseline; gap: .45rem;
}
.nav a .nav__index { color: var(--champagne); font-size: .5625rem; }
.nav a[aria-current="page"] { color: var(--forest); }
.nav a[aria-current="page"] .nav__index { color: var(--forest); }

.nav__toggle {
  display: none;
  background: none; border: 0; cursor: pointer;
  font-family: var(--mono); font-size: .6875rem;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink); padding: .5rem 0;
}

@media (max-width: 44em) {
  .nav__toggle { display: block; }
  .nav__list {
    position: absolute; top: 100%; left: 0; right: 0;
    display: none; flex-direction: column; align-items: flex-start;
    gap: 0;
    background: var(--paper-2);
    border-bottom: 1px solid var(--ink-14);
    padding: .5rem var(--gutter) 1.25rem;
  }
  .nav__list.is-open { display: flex; }
  .nav__list a { padding: .8rem 0; width: 100%; border-bottom: 1px solid var(--ink-14); }
}

/* --------------------------------------------------------------------------
   Héroe — carrusel editorial a sangre completa
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  height: min(88vh, 56rem);
  min-height: 32rem;
  overflow: hidden;
  background: var(--ink);
}

.hero__slide {
  position: absolute; inset: 0;
  opacity: 0;
  transform: scale(1.045);
  transition: opacity 1.1s var(--ease-out), transform 6s linear;
  pointer-events: none;
}
.hero__slide.is-active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
  transition: opacity 1.1s var(--ease-out), transform 7s linear;
}
.hero__slide img { width: 100%; height: 100%; object-fit: cover; }
.hero__slide::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(to top,
    rgba(28, 22, 16, .62) 0%,
    rgba(28, 22, 16, .12) 38%,
    rgba(28, 22, 16, .18) 100%);
}

.hero__caption {
  position: absolute; left: var(--gutter); bottom: clamp(1.75rem, 6vh, 4rem);
  max-width: 40rem; z-index: 3;
  color: var(--paper);
  opacity: 0; transform: translateY(14px);
  transition: opacity .8s var(--ease-out) .3s, transform .8s var(--ease-out) .3s;
}
.hero__slide.is-active .hero__caption { opacity: 1; transform: none; }

.hero__kicker {
  font-family: var(--mono); font-size: .625rem;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--champagne);
  margin: 0 0 .9rem;
}
.hero__title {
  font-family: var(--serif);
  font-weight: 480;
  font-size: clamp(1.9rem, 4.6vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: -.01em;
  margin: 0 0 1.1rem;
  text-wrap: balance;
}
.hero__title a:hover { opacity: .78; }
.hero__cta {
  font-family: var(--mono); font-size: .6875rem;
  letter-spacing: .16em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: .6rem;
  border-bottom: 1px solid rgba(243, 236, 226, .5);
  padding-bottom: .3rem;
}

/* Corchetes de navegación en el borde izquierdo */
.hero__brackets {
  position: absolute; left: var(--gutter); top: 50%; transform: translateY(-50%);
  z-index: 4;
  display: flex; flex-direction: column; gap: 1.1rem;
}
@media (max-width: 44em) { .hero__brackets { display: none; } }

.hero__bracket {
  display: flex; align-items: center; gap: .7rem;
  background: none; border: 0; cursor: pointer;
  color: rgba(243, 236, 226, .55);
  font-family: var(--mono); font-size: .625rem; letter-spacing: .18em;
  padding: 0;
  transition: color .4s ease;
}
.hero__bracket::before {
  content: "";
  width: 1.4rem; height: 1px;
  background: currentColor;
  transition: width .45s var(--ease-out);
}
.hero__bracket.is-active { color: var(--paper); }
.hero__bracket.is-active::before { width: 2.8rem; }
.hero__bracket:hover { color: var(--paper); opacity: 1; }

.hero__counter {
  position: absolute; right: var(--gutter); bottom: clamp(1.75rem, 6vh, 4rem);
  z-index: 4;
  font-family: var(--mono); font-size: .625rem;
  letter-spacing: .2em; color: rgba(243, 236, 226, .75);
}

/* Barra de progreso del carrusel */
.hero__progress {
  position: absolute; left: 0; bottom: 0; z-index: 5;
  width: 100%; height: 2px;
  background: rgba(243, 236, 226, .18);
}
.hero__progress i {
  display: block; height: 100%; width: 0;
  background: var(--champagne);
}

/* --------------------------------------------------------------------------
   Estructura de secciones
   -------------------------------------------------------------------------- */

.section { padding: clamp(4rem, 9vw, 8rem) var(--gutter) 0; }

.section__head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 2rem; flex-wrap: wrap;
  border-top: 1px solid var(--ink);
  padding-top: 1.1rem;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}
.section__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.6rem, 3.4vw, 2.75rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  margin: 0;
  display: flex; align-items: baseline; gap: 1rem;
}
.section__title .section__index {
  font-family: var(--mono); font-size: .6875rem;
  letter-spacing: .16em; color: var(--champagne);
}
.section__note {
  font-family: var(--mono); font-size: .6875rem;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-60);
}

/* --------------------------------------------------------------------------
   Historia destacada — imagen a la izquierda, metadatos a la derecha
   -------------------------------------------------------------------------- */

.featured {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
}
@media (max-width: 56em) { .featured { grid-template-columns: 1fr; } }

.featured__media { overflow: hidden; }
.featured__media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }

.featured__body { padding-bottom: .5rem; }

.meta {
  font-family: var(--mono); font-size: .625rem;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink-60);
  display: flex; flex-wrap: wrap; gap: .4rem 1.1rem;
  margin: 0 0 1.4rem;
}
.meta .meta__topic { color: var(--forest); }

.featured__title {
  font-family: var(--serif);
  font-weight: 480;
  font-size: clamp(1.8rem, 3.6vw, 3.1rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  margin: 0 0 1.4rem;
  text-wrap: balance;
}
.featured__excerpt {
  font-size: clamp(.95rem, 1.1vw, 1.0625rem);
  line-height: 1.75;
  color: var(--taupe);
  max-width: 34rem;
  margin: 0 0 1.8rem;
}
.link-arrow {
  font-family: var(--mono); font-size: .6875rem;
  letter-spacing: .16em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: .6rem;
  border-bottom: 1px solid var(--ink-40);
  padding-bottom: .3rem;
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   Parrilla de historias — dos columnas con desplome vertical asimétrico
   -------------------------------------------------------------------------- */

.stories {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(1.5rem, 3.5vw, 4rem);
  row-gap: clamp(3.5rem, 7vw, 6.5rem);
  max-width: 110rem;
  margin: 0 auto;
}
@media (min-width: 64em) {
  .stories__col--a { padding-top: 0; }
  .stories__col--b { padding-top: clamp(6rem, 16vw, 15rem); }
}
@media (max-width: 44em) {
  .stories { grid-template-columns: 1fr; }
}

.story { display: block; }
.story__media { overflow: hidden; margin-bottom: 1.3rem; }
.story__media img {
  width: 100%; aspect-ratio: 4 / 5; object-fit: cover;
  transition: opacity .5s ease;
}
.story:hover .story__media img { opacity: .88; }
.story__media--wide img { aspect-ratio: 4 / 3; }

.story__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.25rem, 2vw, 1.7rem);
  line-height: 1.22;
  letter-spacing: -.005em;
  margin: 0 0 .7rem;
  text-wrap: balance;
}
.story__excerpt {
  color: var(--taupe);
  font-size: .9rem; line-height: 1.7;
  margin: 0 0 1rem;
  max-width: 30rem;
}

/* --------------------------------------------------------------------------
   Índice de temas — lista a la izquierda, panel a la derecha
   -------------------------------------------------------------------------- */

.topics {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: start;
}
@media (max-width: 56em) { .topics { grid-template-columns: 1fr; } }

.topics__list { list-style: none; margin: 0; padding: 0; }

.topics__item { border-bottom: 1px solid var(--ink-14); }

.topics__btn {
  display: flex; align-items: baseline; gap: 1.1rem;
  width: 100%;
  background: none; border: 0; cursor: pointer;
  text-align: left;
  padding: 1.2rem 0;
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 480;
  font-size: clamp(1.25rem, 2.4vw, 1.9rem);
  line-height: 1.15;
  transition: opacity .35s ease, padding-left .4s var(--ease-out);
}
.topics__btn .topics__count {
  font-family: var(--mono); font-size: .625rem;
  letter-spacing: .14em; color: var(--champagne);
}
.topics__btn:hover { opacity: .6; }
.topics__btn.is-active { color: var(--forest); padding-left: .9rem; }
.topics__btn.is-active .topics__count { color: var(--forest); }

.topics__panel { position: relative; min-height: 22rem; }

.topics__card {
  position: absolute; inset: 0;
  opacity: 0; transform: translateY(10px);
  transition: opacity .55s var(--ease-out), transform .55s var(--ease-out);
  pointer-events: none;
  display: flex; flex-direction: column; gap: 1.6rem;
}
.topics__card.is-active { opacity: 1; transform: none; pointer-events: auto; }

.topics__media { overflow: hidden; }
.topics__media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }

.topics__desc {
  color: var(--taupe);
  font-size: .95rem; line-height: 1.75;
  max-width: 34rem; margin: 0;
}
.topics__links { list-style: none; margin: 0; padding: 0; }
.topics__links li { border-top: 1px solid var(--ink-14); }
.topics__links a {
  display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
  padding: .85rem 0;
  font-size: .9rem;
}
.topics__links a .topics__arrow {
  font-family: var(--mono); font-size: .75rem; color: var(--champagne);
}

/* --------------------------------------------------------------------------
   Manifiesto — cita a tamaño generoso
   -------------------------------------------------------------------------- */

.manifest {
  text-align: center;
  padding-left: var(--gutter); padding-right: var(--gutter);
}
.manifest blockquote {
  margin: 0 auto;
  max-width: 56rem;
  font-family: var(--serif);
  font-weight: 440;
  font-size: clamp(1.7rem, 4.4vw, 3.6rem);
  line-height: 1.18;
  letter-spacing: -.01em;
  text-wrap: balance;
}
.manifest blockquote em { font-style: italic; color: var(--forest); }
.manifest cite {
  display: block; margin-top: 2rem;
  font-family: var(--mono); font-style: normal;
  font-size: .625rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--ink-60);
}

/* --------------------------------------------------------------------------
   Pie de página — colofón con aire generoso
   -------------------------------------------------------------------------- */

.footer {
  margin-top: clamp(5rem, 10vw, 9rem);
  border-top: 1px solid var(--ink);
  padding: 2.2rem var(--gutter) clamp(3rem, 7vw, 6rem);
}
.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 6fr) repeat(2, minmax(0, 3fr));
  gap: clamp(2rem, 5vw, 5rem);
}
@media (max-width: 56em) { .footer__grid { grid-template-columns: 1fr; } }

.footer__brand .wordmark { font-size: clamp(2.2rem, 5vw, 3.4rem); }
.footer__tag {
  color: var(--taupe);
  font-size: .92rem; line-height: 1.75;
  max-width: 26rem;
  margin: 1.4rem 0 0;
}

.footer__col h2 {
  font-family: var(--mono); font-size: .625rem;
  font-weight: 500; letter-spacing: .22em; text-transform: uppercase;
  color: var(--ink-60);
  margin: 0 0 1.2rem;
}
.footer__col ul { list-style: none; margin: 0; padding: 0; }
.footer__col li { margin-bottom: .7rem; }
.footer__col a { font-size: .9rem; }

.footer__legal {
  margin-top: clamp(3.5rem, 7vw, 6rem);
  padding-top: 1.4rem;
  border-top: 1px solid var(--ink-14);
  display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap;
  font-family: var(--mono); font-size: .625rem;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-60);
}
.footer__disclaimer {
  grid-column: 1 / -1;
  max-width: 46rem;
  font-size: .75rem; line-height: 1.7;
  letter-spacing: 0; text-transform: none;
  color: var(--ink-60);
  margin: 0;
}

/* --------------------------------------------------------------------------
   Página de artículo
   -------------------------------------------------------------------------- */

.progress {
  position: fixed; top: 0; left: 0; z-index: 300;
  width: 100%; height: 2px;
  background: transparent;
}
.progress i {
  display: block; height: 100%; width: 0;
  background: var(--champagne);
}

.crumbs {
  padding: 2.2rem var(--gutter) 0;
  font-family: var(--mono); font-size: .625rem;
  letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-60);
}
.crumbs a { color: var(--ink); }
.crumbs .crumbs__sep { color: var(--champagne); margin: 0 .5rem; }

.article {
  max-width: 43rem;
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 5rem) var(--gutter) 0;
}

.article__header { margin-bottom: clamp(2.5rem, 5vw, 4rem); }

.article__title {
  font-family: var(--serif);
  font-weight: 460;
  font-size: clamp(2.1rem, 5.4vw, 3.9rem);
  line-height: 1.08;
  letter-spacing: -.015em;
  margin: 0 0 1.6rem;
  text-wrap: balance;
}

.article__lead {
  font-family: var(--serif);
  font-weight: 380;
  font-size: clamp(1.1rem, 1.6vw, 1.3rem);
  line-height: 1.6;
  color: var(--taupe);
  margin: 0;
}

.article__media {
  margin: 0 calc(50% - 50vw + var(--gutter)) 3.5rem;
}
.article__media img { width: 100%; max-height: 34rem; object-fit: cover; }
.article__media figcaption {
  padding: .8rem var(--gutter) 0 0;
  font-family: var(--mono); font-size: .625rem;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-60);
}

/* Cuerpo del texto */
.article__body h2 {
  font-family: var(--serif);
  font-weight: 520;
  font-size: clamp(1.45rem, 2.6vw, 1.95rem);
  line-height: 1.2;
  letter-spacing: -.005em;
  margin: 2.8em 0 .9em;
}
.article__body h2 .h2-index {
  font-family: var(--mono); font-size: .7rem;
  letter-spacing: .16em; color: var(--champagne);
  margin-right: .8rem; vertical-align: .35em;
}
.article__body p { margin: 0 0 1.5em; }
.article__body ul, .article__body ol {
  margin: 0 0 1.5em; padding-left: 1.2rem;
}
.article__body li { margin-bottom: .55em; }
.article__body li::marker { color: var(--champagne); }
.article__body strong { font-weight: 600; color: var(--ink); }

.article__body > p:first-of-type::first-letter {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 3.4em;
  float: left;
  line-height: .82;
  padding: .06em .12em 0 0;
  color: var(--forest);
}

.pullquote {
  margin: 2.8em 0;
  padding: 0;
  border: 0;
  font-family: var(--serif);
  font-weight: 420;
  font-size: clamp(1.3rem, 2.4vw, 1.75rem);
  line-height: 1.35;
  color: var(--forest);
  text-wrap: balance;
}
.pullquote::before {
  content: "—";
  display: block;
  color: var(--champagne);
  margin-bottom: .6rem;
}

.article__note {
  margin: 3em 0 0;
  padding: 1.4rem 0 0;
  border-top: 1px solid var(--ink-14);
  font-size: .82rem; line-height: 1.75;
  color: var(--ink-60);
}

/* Navegación entre artículos */
.article__nav {
  display: grid; grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--ink);
  margin-top: clamp(3.5rem, 7vw, 6rem);
}
@media (max-width: 44em) { .article__nav { grid-template-columns: 1fr; } }

.article__nav a {
  padding: 1.8rem 0;
  display: flex; flex-direction: column; gap: .55rem;
}
.article__nav a + a { border-left: 1px solid var(--ink-14); padding-left: 2rem; }
.article__nav a:first-child { padding-right: 2rem; }
@media (max-width: 44em) {
  .article__nav a + a { border-left: 0; border-top: 1px solid var(--ink-14); padding-left: 0; }
}
.article__nav .article__nav-label {
  font-family: var(--mono); font-size: .625rem;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--champagne);
}
.article__nav .article__nav-title {
  font-family: var(--serif); font-weight: 500;
  font-size: 1.15rem; line-height: 1.3;
}
.article__nav a:hover { opacity: .55; }

/* --------------------------------------------------------------------------
   Movimiento reducido
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .hero__slide { transform: none; }
}