/* ==========================================================================
   TOKENS — mismos que la Memoria, para que se sientan de la misma familia
   ========================================================================== */
:root {
  --color-bg: #FAF6F0;
  --color-bg-alt: #FFFFFF;
  --color-text: #2B2622;
  --color-text-muted: #6E6358;
  --color-accent: #7A2E33;
  --color-pill-bg: #E4DCD2;
  --color-border: #E4DCD2;

  --font-heading: "Fraunces", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;

  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;

  --transition-base: 200ms ease;

  /* Tamaños de diapositiva: relativos a la altura de pantalla,
     con suelo y techo en px para que nunca sean ilegibles ni desmesurados.
     Presupuesto pensado para que la diapositiva más cargada (título de 3
     líneas + cuerpo + imagen + bullets + enlace) quepa con margen en 100vh. */
  --slide-pad-y: clamp(14px, 3.5vh, 40px);
  --slide-gap-xs: clamp(4px, 1vh, 12px);
  --slide-gap-sm: clamp(8px, 1.4vh, 18px);
  --slide-gap-md: clamp(10px, 1.8vh, 24px);
  --slide-gap-lg: clamp(14px, 2.2vh, 30px);

  --fs-eyebrow: clamp(14px, 2.2vh, 22px);
  --fs-title: clamp(32px, 5.5vh, 72px);
  --fs-body: clamp(20px, 3.2vh, 34px);
  --fs-bullet: clamp(19px, 2.8vh, 28px);
  --fs-link: clamp(15px, 2.2vh, 22px);
  --fs-caption: clamp(13px, 1.8vh, 18px);

  --img-h: clamp(100px, 20vh, 260px);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

code {
  font-family: "SF Mono", "Consolas", monospace;
  font-size: 0.85em;
  background: var(--color-pill-bg);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ==========================================================================
   DIAPOSITIVAS
   ========================================================================== */
#slides {
  height: 100vh;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
}

.slide {
  height: 100vh;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: var(--slide-pad-y) clamp(24px, 8vw, 120px);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.slide__inner {
  width: 100%;
  max-height: 100%;
  margin-top: auto;
  margin-bottom: auto;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
}

.slide__eyebrow {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--slide-gap-sm);
}

.slide__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-title);
  line-height: 1.08;
  color: var(--color-text);
  margin: 0 0 var(--slide-gap-md);
  max-width: 32ch;
}

.slide__body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--fs-body);
  line-height: 1.4;
  color: var(--color-text-muted);
  max-width: 72ch;
  margin: 0 0 var(--slide-gap-lg);
}

.slide__bullets {
  list-style: none;
  margin: 0 0 var(--slide-gap-lg);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--slide-gap-xs);
}

.slide__bullets li {
  position: relative;
  padding-left: 24px;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--fs-bullet);
  line-height: 1.4;
  color: var(--color-text);
  max-width: 72ch;
}

.slide__bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.slide__swatches {
  display: flex;
  gap: var(--slide-gap-md);
  margin: 0 0 var(--slide-gap-lg);
  flex-wrap: wrap;
}

.swatch {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--slide-gap-xs);
}

.swatch__chip {
  display: block;
  width: clamp(36px, 8vh, 72px);
  height: clamp(36px, 8vh, 72px);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.swatch__label {
  font-family: var(--font-body);
  font-size: var(--fs-caption);
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.4;
}

.slide__type-specimen {
  margin: 0 0 var(--slide-gap-md);
}

.type-specimen__sample {
  margin: 0;
  color: var(--color-text);
}

.type-specimen__sample--fraunces {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: clamp(20px, 4vh, 44px);
  line-height: 1.1;
}

.type-specimen__sample--inter {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: clamp(13px, 2vh, 22px);
  max-width: 40ch;
  line-height: 1.35;
}

.type-specimen__caption {
  margin: 2px 0 var(--slide-gap-sm);
  font-family: var(--font-body);
  font-size: var(--fs-caption);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.slide__compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--slide-gap-md);
  margin: 0 0 var(--slide-gap-md);
  width: 100%;
  max-width: 760px;
}

.slide__compare figure {
  margin: 0;
}

.slide__compare figcaption {
  margin-top: var(--slide-gap-xs);
  font-family: var(--font-body);
  font-size: var(--fs-caption);
  letter-spacing: 0.02em;
  color: var(--color-text-muted);
  text-align: center;
}

@media (max-width: 640px) {
  .slide__compare {
    grid-template-columns: 1fr;
  }
}

.slide__screenshot {
  margin: 0 0 var(--slide-gap-md);
  width: 100%;
  max-width: clamp(320px, 40vw, 560px);
}

.slide__screenshot figcaption {
  margin-top: var(--slide-gap-xs);
  font-family: var(--font-body);
  font-size: var(--fs-caption);
  color: var(--color-text-muted);
}

/* Sistema de ampliación: la miniatura puede ser pequeña sin problema,
   porque al pasar el cursor (o enfocar con teclado) se muestra una copia
   grande centrada en la pantalla, en position:fixed — así nunca afecta
   a la altura de la diapositiva ni se recorta por el overflow:hidden. */
.img-zoom {
  position: relative;
  display: block;
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  box-shadow: 0 4px 14px rgba(43, 38, 34, 0.08);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  cursor: zoom-in;
}

.img-zoom:hover,
.img-zoom:focus-within {
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px rgba(122, 46, 51, 0.16);
}

.img-zoom__thumb {
  display: block;
  width: 100%;
  height: var(--img-h);
  object-fit: cover;
  object-position: top center;
  border-radius: 7px;
}

/* Capa de degradado de suavizado inferior sin romper el desplegable fixed */
.img-zoom::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40px;
  background: linear-gradient(to bottom, rgba(250, 246, 240, 0) 0%, rgba(250, 246, 240, 0.85) 100%);
  border-bottom-left-radius: 7px;
  border-bottom-right-radius: 7px;
  pointer-events: none;
  transition: opacity var(--transition-base);
  z-index: 2;
}

.img-zoom:hover::before,
.img-zoom:focus-within::before {
  opacity: 0.1;
}

/* Insignia indicadora de ampliación tipo card/mockup */
.img-zoom::after {
  content: "🔍 Pasa el cursor para ampliar";
  position: absolute;
  bottom: 6px;
  right: 6px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 500;
  color: #2B2622;
  background: rgba(250, 246, 240, 0.94);
  border: 1px solid var(--color-border);
  padding: 2px 7px;
  border-radius: 4px;
  pointer-events: none;
  transition: opacity var(--transition-base);
  z-index: 5;
}

.img-zoom:hover::after,
.img-zoom:focus-within::after {
  opacity: 0;
}

.img-zoom__preview {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 88vw;
  max-height: 88vh;
  width: auto;
  height: auto;
  z-index: 99999;
  border-radius: 10px;
  border: 3px solid var(--color-bg-alt);
  box-shadow: 0 24px 64px rgba(20, 16, 14, 0.5);
  pointer-events: none;
}

.img-zoom:hover .img-zoom__preview,
.img-zoom:focus-within .img-zoom__preview,
.img-zoom__thumb:focus-visible ~ .img-zoom__preview {
  display: block;
}

.img-zoom__hint {
  display: none;
}

.slide__diagram {
  width: 100%;
  max-width: 760px;
  height: auto;
  max-height: clamp(90px, 20vh, 180px);
  margin: 0 0 var(--slide-gap-md);
}

.slide__link {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--fs-link);
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
  transition: opacity var(--transition-base);
}

.slide__link:hover { opacity: 0.7; }

.slide__links-final {
  display: flex;
  gap: var(--space-5);
  flex-wrap: wrap;
}

/* Portada */
.slide--portada {
  background: var(--color-text);
}

.slide--portada .slide__eyebrow {
  color: var(--color-pill-bg);
}

.slide--portada .slide__title {
  color: var(--color-bg);
  font-size: clamp(48px, 9vw, 110px);
}

.slide__title-dot {
  color: var(--color-accent);
}

.slide--portada .slide__sub {
  font-family: var(--font-body);
  font-size: clamp(18px, 2.2vw, 28px);
  color: var(--color-pill-bg);
  max-width: 42ch;
  margin: 0;
}

/* Cierre */
.slide--cierre .slide__inner {
  align-items: center;
  text-align: center;
}

.slide--cierre .slide__title {
  max-width: none;
}

.slide--cierre .slide__links-final {
  justify-content: center;
}

/* ==========================================================================
   NAVEGACIÓN
   ========================================================================== */
.progress-dots {
  position: fixed;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 50;
}

.progress-dots__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-pill-bg);
  transition: background var(--transition-base), transform var(--transition-base);
}

.progress-dots__dot.is-active {
  background: var(--color-accent);
  transform: scale(1.4);
}

.slide-counter {
  position: fixed;
  bottom: var(--space-4);
  left: var(--space-4);
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--color-text-muted);
  margin: 0;
  z-index: 50;
}

.slide-nav {
  position: fixed;
  bottom: var(--space-4);
  right: var(--space-4);
  display: flex;
  gap: var(--space-2);
  z-index: 50;
}

.slide-nav__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-base);
}

.slide-nav__btn:hover {
  background: var(--color-pill-bg);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .progress-dots { display: none; }
}