/* ==========================================================================
   Valtx SDD — Layout and components
   Mobile first. All colours, spacing and type come from tokens.css.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Reset and base
   -------------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  margin: 0;
  color: var(--color-heading);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: var(--color-accent-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--color-accent-hover);
}

svg {
  display: block;
}

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

/* Skip-link target. It only receives focus programmatically, and the visible
   jump to the section is the indicator, so no ring around the whole page. */
main:focus {
  outline: none;
}

/* --------------------------------------------------------------------------
   2. Layout helpers
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--section-y);
}

.section--alt {
  background-color: var(--color-bg-alt);
  border-block: 1px solid var(--color-border);
}

.section__title {
  font-size: var(--text-2xl);
}

.section__intro {
  max-width: var(--measure);
  margin-top: var(--space-3);
  color: var(--color-muted);
  font-size: var(--text-lg);
}

.eyebrow {
  margin-bottom: var(--space-4);
  color: var(--color-accent-strong);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

/* --------------------------------------------------------------------------
   3. Skip link
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  z-index: 100;
  top: var(--space-2);
  left: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-decoration: none;
  transform: translateY(calc(-100% - var(--space-4)));
  transition: transform var(--duration-fast) var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   4. Header, logo and navigation
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: var(--color-bg); /* fallback for no color-mix() support */
  background-color: color-mix(in srgb, var(--color-bg) 88%, transparent);
  border-bottom: 1px solid var(--color-border);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  backdrop-filter: saturate(1.4) blur(10px);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: 4rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  color: var(--color-heading);
  text-decoration: none;
}

.logo__svg {
  width: 8.25rem;
  height: 1.5rem;
}

.logo__mark {
  fill: var(--color-accent);
}

.logo__glyph {
  stroke: var(--color-on-accent);
}

.logo__word {
  fill: currentColor;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
}

/* Navigation: visible by default so the page works without JavaScript.
   The collapsed mobile behaviour is only applied once main.js adds `.js`. */
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
}

.site-nav a {
  display: inline-block;
  padding-block: var(--space-2);
  color: var(--color-muted);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--color-heading);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background-color: transparent;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-heading);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  cursor: pointer;
}

.nav-toggle__icon {
  width: 1.25rem;
  height: 1.25rem;
}

@media (max-width: 47.99em) {
  .js .nav-toggle {
    display: inline-flex;
  }

  .js .site-nav {
    display: none;
    flex-basis: 100%;
  }

  .js .site-nav.is-open {
    display: block;
  }

  .js .site-nav__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: var(--space-4);
  }

  .js .site-nav a {
    padding-block: var(--space-3);
    font-size: var(--text-base);
  }
}

/* --------------------------------------------------------------------------
   5. Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.875rem;
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: background-color var(--duration-fast) var(--ease),
              border-color var(--duration-fast) var(--ease),
              color var(--duration-fast) var(--ease);
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-on-accent);
}

.btn--primary:hover {
  background-color: var(--color-accent-hover);
  color: var(--color-on-accent);
}

.btn--secondary {
  background-color: var(--color-surface);
  border-color: var(--color-border-strong);
  color: var(--color-heading);
}

.btn--secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-strong);
}

/* --------------------------------------------------------------------------
   6. Hero
   -------------------------------------------------------------------------- */

.hero {
  padding-block: clamp(3.5rem, 2rem + 7vw, 7rem);
}

.hero__inner {
  max-width: 46rem;
}

.hero__title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
}

.hero__subtitle {
  max-width: var(--measure);
  margin-top: var(--space-5);
  color: var(--color-muted);
  font-size: var(--text-lg);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-7);
}

/* --------------------------------------------------------------------------
   7. Cards — "Qué hacemos"
   -------------------------------------------------------------------------- */

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-7);
}

@media (min-width: 40em) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 60em) {
  .cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  padding: var(--space-5);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: var(--space-4);
  background-color: var(--color-accent-soft);
  border-radius: var(--radius-md);
  color: var(--color-accent-strong);
}

.card__icon svg {
  width: 1.375rem;
  height: 1.375rem;
}

.card__title {
  font-size: var(--text-xl);
}

.card__text {
  margin-top: var(--space-3);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

/* --------------------------------------------------------------------------
   8. Timeline — "Cómo trabajamos"
   -------------------------------------------------------------------------- */

.timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-top: var(--space-7);
}

.timeline__step {
  position: relative;
  padding-left: var(--space-6);
  border-left: 2px solid var(--color-border-strong);
}

.timeline__num {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-wide);
}

.timeline__step::before {
  content: "";
  position: absolute;
  top: 0.45rem;
  left: -0.4375rem;
  width: 0.75rem;
  height: 0.75rem;
  background-color: var(--color-accent);
  border: 2px solid var(--color-bg-alt);
  border-radius: var(--radius-pill);
}

.timeline__title {
  font-size: var(--text-lg);
}

.timeline__text {
  max-width: 34rem;
  margin-top: var(--space-2);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

/* Horizontal on wide screens: the connector runs along the top. */
@media (min-width: 60em) {
  .timeline {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
  }

  .timeline__step {
    padding-top: var(--space-5);
    padding-left: 0;
    border-left: 0;
    border-top: 2px solid var(--color-border-strong);
  }

  .timeline__step::before {
    top: -0.4375rem;
    left: 0;
  }
}

/* --------------------------------------------------------------------------
   9. Contact
   -------------------------------------------------------------------------- */

.contact__inner {
  max-width: var(--measure);
}

.contact__text {
  margin-top: var(--space-3);
  color: var(--color-muted);
  font-size: var(--text-lg);
}

.contact__action {
  margin-top: var(--space-6);
}

/* --------------------------------------------------------------------------
   10. Footer
   -------------------------------------------------------------------------- */

.site-footer {
  padding-block: var(--space-6);
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-footer p {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.site-footer a {
  color: var(--color-muted);
  font-weight: var(--weight-medium);
}

.site-footer a:hover {
  color: var(--color-accent-strong);
}

/* --------------------------------------------------------------------------
   11. Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}