/* ==========================================================================
   Primer Paso Digital — sistema "Sendero"
   Tokens + reset + componentes. Ver CLAUDE.md para la paleta y tipografía.
   ========================================================================== */

:root {
  --ink: #16211D;
  --niebla: #ECEEE7;
  --niebla-alt: #E2E5D9;
  --sendero: #12544A;
  --sendero-dark: #0C3B34;
  --marca: #F0A63A;
  --arcilla: #B5652D;
  --whatsapp: #25D366;
  --whatsapp-dark: #1DA851;
  --white: #FFFFFF;

  --font-display: 'Bricolage Grotesque', 'Segoe UI', sans-serif;
  --font-body: 'Public Sans', 'Segoe UI', sans-serif;
  --font-mono: 'Space Mono', 'Courier New', monospace;

  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;

  --container-max: 1180px;

  --ease: cubic-bezier(.4, 0, .2, 1);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--niebla);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
svg { display: block; }

:focus-visible {
  outline: 3px solid var(--marca);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -60px;
  background: var(--marca);
  color: var(--ink);
  padding: .75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 700;
  z-index: 1000;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 1rem; }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.section { position: relative; padding-block: clamp(4rem, 9vw, 7rem); overflow: hidden; }
.section--dark { background: var(--ink); color: var(--niebla); }
.section--light { background: var(--niebla); color: var(--ink); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--marca);
  margin-bottom: .85rem;
}

.section__head { max-width: 640px; margin-bottom: clamp(2.5rem, 6vw, 3.5rem); }
.section__head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 3.4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -.01em;
}
.section__sub { margin-top: .9rem; font-size: 1.05rem; opacity: .85; max-width: 52ch; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  padding: .9rem 1.6rem;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 1.15em; height: 1.15em; }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--whatsapp { background: var(--whatsapp); color: var(--white); }
.btn--whatsapp:hover { background: var(--whatsapp-dark); box-shadow: 0 10px 24px -8px rgba(37,211,102,.5); }

.btn--sm { padding: .55rem 1.1rem; font-size: .88rem; }
.btn--lg { padding: 1.05rem 2rem; font-size: 1.1rem; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: .85rem;
  font-weight: 700;
  border-bottom: 1.5px solid currentColor;
  padding-bottom: 2px;
  width: fit-content;
  transition: gap .18s var(--ease), opacity .18s var(--ease);
}
.link-arrow:hover { opacity: .75; }

/* ---------- Reveal on scroll ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in-view { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ---------- Waypoint (sendero) ---------- */
.waypoint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  width: fit-content;
  margin-inline: auto;
  margin-bottom: 1.75rem;
}
.waypoint__line {
  width: 2px;
  height: 56px;
  background-image: repeating-linear-gradient(to bottom, var(--marca) 0 6px, transparent 6px 15px);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .9s var(--ease);
}
.section.in-view .waypoint__line { transform: scaleY(1); }
@media (prefers-reduced-motion: reduce) {
  .waypoint__line { transform: scaleY(1) !important; }
}

.waypoint__marker {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .85rem;
  border: 2px solid var(--marca);
  color: var(--marca);
  background: rgba(240, 166, 58, .08);
  flex-shrink: 0;
}
.waypoint__marker--final {
  background: var(--marca);
  color: var(--ink);
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(22, 33, 29, .08);
}
/* Blur lives on a pseudo-element (not on .site-header itself) so the header
   never becomes the containing block for its position:fixed mobile nav —
   backdrop-filter on an ancestor hijacks fixed-position sizing/offsets. */
.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(236, 238, 231, .92);
  backdrop-filter: blur(8px);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: .9rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  color: var(--sendero);
  flex-shrink: 0;
}
.brand__mark { width: 2rem; height: 2rem; }
.brand__word {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
}
.brand__word strong { color: var(--sendero); font-weight: 800; }

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.25rem);
}
.nav__list a {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .95rem;
  position: relative;
  padding-block: .25rem;
}
.nav__list a::after {
  content: '';
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--marca);
  transition: right .25s var(--ease);
}
.nav__list a:hover::after,
.nav__list a.is-active::after { right: 0; }
.nav__list a.is-active { color: var(--sendero); }

.site-header__actions { display: flex; align-items: center; gap: 1rem; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.25rem;
  height: 2.25rem;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero { padding-top: clamp(3rem, 7vw, 5rem); }
.hero__topo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.hero__inner { position: relative; z-index: 1; }

.hero__content { max-width: 620px; }
.hero__content h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -.015em;
  margin-bottom: 1.25rem;
}
.hero__lead {
  font-size: 1.15rem;
  opacity: .85;
  max-width: 48ch;
  margin-bottom: 2rem;
}

.hero__media {
  margin-top: clamp(2.5rem, 6vw, 3.5rem);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.hero__media img { width: 100%; height: auto; }

@media (min-width: 900px) {
  .hero__inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 3rem; align-items: center; }
  .hero__media { margin-top: 0; }
}

/* ==========================================================================
   Qué hago — services
   ========================================================================== */
.services__grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: 0 1px 2px rgba(22,33,29,.05);
}
.service-card img {
  border-radius: var(--radius-md);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  margin-bottom: 1.25rem;
}
.service-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: .5rem;
  color: var(--sendero);
}
.service-card p { font-size: .95rem; opacity: .8; }

/* ==========================================================================
   Ventajas — advantages
   ========================================================================== */
.advantages__grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.advantage-card {
  background: rgba(236, 238, 231, .06);
  border: 1px solid rgba(236, 238, 231, .12);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}
.advantage-card img {
  border-radius: var(--radius-md);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  margin-bottom: 1.1rem;
}
.advantage-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: .4rem;
  color: var(--marca);
}
.advantage-card p { font-size: .92rem; opacity: .8; }

/* ==========================================================================
   Portafolio
   ========================================================================== */
.portfolio-card--featured { margin-bottom: 2.5rem; }
@media (min-width: 900px) {
  .portfolio-card--featured {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    align-items: stretch;
  }
  .portfolio-card--featured .portfolio-card__preview { display: flex; flex-direction: column; }
  /* La captura del sitio es más alta que ancha: se ancla en absolute para que
     llene la columna sin imponer su altura intrínseca a toda la tarjeta. */
  .portfolio-card--featured .portfolio-card__image { flex: 1; aspect-ratio: auto; min-height: 380px; position: relative; }
  .portfolio-card--featured .portfolio-card__image img { position: absolute; inset: 0; }
  .portfolio-card--featured .portfolio-card__body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem;
  }
}
.portfolio-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(22,33,29,.05);
}
.portfolio-card__preview { display: block; }
.browser-bar {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .65rem .9rem;
  background: var(--niebla-alt);
}
.browser-bar__dots { display: flex; gap: 5px; }
.browser-bar__dots i {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(22,33,29,.2);
  display: block;
}
.browser-bar__url {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--sendero);
  background: var(--white);
  padding: .2rem .7rem;
  border-radius: 999px;
}
.portfolio-card__image { display: block; aspect-ratio: 16 / 10; overflow: hidden; }
.portfolio-card__image img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform .4s var(--ease); }
.portfolio-card:hover .portfolio-card__image img { transform: scale(1.03); }
.portfolio-card__body { padding: 1.5rem; }
.portfolio-card__body h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--sendero);
  margin-bottom: .5rem;
}
.portfolio-card__body p { font-size: .95rem; opacity: .8; margin-bottom: 1rem; }
.portfolio-card__body .link-arrow { color: var(--sendero); }

/* ==========================================================================
   Demos por rubro (dentro de la sección Portafolio, fondo claro)
   ========================================================================== */
.demos__grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.demo-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(22, 33, 29, .08);
  box-shadow: 0 1px 2px rgba(22, 33, 29, .05);
  transition: border-color .2s var(--ease);
  display: flex;
  flex-direction: column;
}
.demo-card:hover { border-color: var(--sendero); }
.demo-card__image { display: block; aspect-ratio: 4 / 3; overflow: hidden; background: var(--niebla-alt); }
.demo-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s var(--ease); }
.demo-card:hover .demo-card__image img { transform: scale(1.05); }
.demo-card__body { padding: 1.25rem 1.4rem 1.5rem; display: flex; flex-direction: column; flex: 1; }
.demo-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--sendero);
  margin-bottom: .35rem;
}
.demo-card__desc { font-size: .9rem; opacity: .8; margin-bottom: .9rem; }
.demo-card__links { display: flex; flex-direction: column; gap: .55rem; margin-top: auto; }
.demo-card__links .link-arrow { color: var(--sendero); font-size: .82rem; }

/* ==========================================================================
   Contacto / CTA final
   ========================================================================== */
.contact {
  background: var(--sendero);
  color: var(--niebla);
  text-align: center;
}
.contact__inner { display: flex; flex-direction: column; align-items: center; }
.contact .section__head { margin-inline: auto; }
.contact .section__sub { margin-inline: auto; }
.contact .eyebrow { color: var(--marca); }
.contact h2 { color: var(--white); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: var(--ink); color: var(--niebla); padding-block: 2.5rem; }
.site-footer__inner { display: flex; flex-direction: column; align-items: center; gap: .75rem; text-align: center; }
.site-footer .brand__word { color: var(--niebla); }
.site-footer .brand__word strong { color: var(--marca); }
.site-footer .brand { color: var(--marca); }
.site-footer__tag { font-size: .9rem; opacity: .7; max-width: 40ch; }
.site-footer__copy { font-family: var(--font-mono); font-size: .78rem; opacity: .55; }

/* ==========================================================================
   Mobile nav
   ========================================================================== */
@media (max-width: 480px) {
  .site-header__actions .btn--sm span { display: none; }
  .site-header__actions .btn--sm { padding: .6rem; }
  .brand__word { font-size: .88rem; }
}

@media (max-width: 899px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    inset: 0 0 0 auto;
    top: 0;
    height: 100%;
    width: min(78vw, 320px);
    background: var(--niebla);
    padding: 6rem 2rem 2rem;
    transform: translateX(100%);
    transition: transform .3s var(--ease);
    box-shadow: -12px 0 30px rgba(22,33,29,.12);
  }
  .nav.is-open { transform: translateX(0); }
  .nav__list { flex-direction: column; align-items: flex-start; gap: 1.75rem; }
  .nav__list a { font-size: 1.15rem; }
}

@media (min-width: 900px) {
  .site-header__inner { gap: 2.5rem; }
}

/* ==========================================================================
   Volver arriba
   ========================================================================== */
.back-to-top {
  position: fixed;
  right: clamp(1rem, 4vw, 2rem);
  bottom: clamp(1rem, 4vw, 2rem);
  z-index: 90;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: none;
  background: var(--marca);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 24px -8px rgba(22, 33, 29, .4);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity .25s var(--ease), transform .25s var(--ease), background .2s var(--ease), color .2s var(--ease);
}
.back-to-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top:hover { background: var(--sendero); color: var(--niebla); }
.back-to-top svg { width: 1.4rem; height: 1.4rem; }

@media (prefers-reduced-motion: reduce) {
  .back-to-top { transition: opacity .001ms, color .001ms; }
}