/* ---- Buttons / CTAs ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--step--1);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 1.05em 1.9em;
  border-radius: 0; /* sharp corners for all buttons */
  border: 1.5px solid transparent;
  transition: transform var(--dur-fast) var(--ease-out-quart),
    background-color var(--dur-fast) var(--ease-out-quart),
    color var(--dur-fast) var(--ease-out-quart),
    border-color var(--dur-fast) var(--ease-out-quart);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--fill-on-dark {
  background: var(--ember);
  color: var(--ink);
}
.btn--fill-on-dark:hover {
  background: var(--text-on-dark);
}

.btn--fill-on-light {
  background: var(--ink);
  color: var(--cream);
}
.btn--fill-on-light:hover {
  background: var(--graphite);
}

.btn--outline-on-dark {
  border-color: color-mix(in oklch, var(--cream) 50%, transparent);
  color: var(--text-on-dark);
}
.btn--outline-on-dark:hover {
  border-color: var(--orange);
  background: color-mix(in oklch, var(--orange) 14%, transparent);
}

.btn--outline-on-light {
  border-color: color-mix(in oklch, var(--ink) 35%, transparent);
  color: var(--text-on-light);
}
.btn--outline-on-light:hover {
  border-color: var(--accent-hover);
  background: color-mix(in oklch, var(--accent-hover) 10%, transparent);
}

/* Opt-in modifier: animated gradient border (black + orange), brand-colored;
   see css/motion.css for the shimmer animation (gated by prefers-reduced-motion). */
.btn--anim-gradient {
  position: relative;
  z-index: 0;
  border-color: transparent;
  background: none;
}
.btn--anim-gradient:hover {
  border-color: transparent;
}

.btn--anim-gradient::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  padding: 1.5px;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

.btn--anim-gradient::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--ink);
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease-out-quart);
}

.btn--anim-gradient:hover::after {
  opacity: 1;
}

/* Hover: freeze on a solid, readable black-bg / orange-border state
   instead of the shimmering gradient; see motion.css for the matching
   text-color override. */
.btn--anim-gradient:hover::before {
  background: var(--orange);
  animation: none !important;
}

.btn--outline-on-dark.btn--anim-gradient::before {
  background: linear-gradient(115deg, var(--ember), var(--orange), var(--ink) 50%, var(--orange), var(--ember));
  background-size: 300% 100%;
}

.btn--outline-on-light.btn--anim-gradient::before {
  background: linear-gradient(115deg, var(--accent-hover), var(--orange), var(--ink) 50%, var(--orange), var(--accent-hover));
  background-size: 300% 100%;
}

/* text-link CTA style (underline animates in) */
.link-cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding-bottom: 0.3em;
}

.link-cta::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transform: scaleX(0.35);
  transform-origin: left;
  transition: transform var(--dur-med) var(--ease-out-expo);
}

.link-cta:hover::after,
.link-cta:focus-visible::after {
  transform: scaleX(1);
}

.link-cta__arrow {
  transition: transform var(--dur-med) var(--ease-out-expo);
}
.link-cta:hover .link-cta__arrow {
  transform: translateX(4px);
}

/* ---- Nav ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--edge-pad);
  color: var(--text-on-dark);
  transition: background-color var(--dur-med) var(--ease-out-quart),
    box-shadow var(--dur-med) var(--ease-out-quart),
    padding var(--dur-med) var(--ease-out-quart),
    color var(--dur-med) var(--ease-out-quart);
}

.nav__links a {
  color: inherit;
}

.nav.is-scrolled {
  padding-block: var(--space-2);
  background-color: hsla(45, 6%, 86%, 0.6);
  box-shadow: 0 1px 0 color-mix(in oklch, var(--ink) 8%, transparent);
  backdrop-filter: blur(32px) saturate(280%);
  -webkit-backdrop-filter: blur(32px) saturate(280%);
  color: var(--text-on-light);
}

.nav.is-scrolled .nav__links a {
  color: inherit;
}

.nav__logo {
  display: block;
  height: 26px;
  width: auto;
}

.nav__logo-dark {
  display: block;
}
.nav__logo-light {
  display: none;
}
.nav.is-scrolled .nav__logo-dark {
  display: none;
}
.nav.is-scrolled .nav__logo-light {
  display: block;
}

/* On small screens the full wordmark gets cramped/distorted next to the
   nav links; swap to the icon mark instead, same dark/light logic. */
.nav__icon {
  display: none;
  height: 30px;
  width: auto;
}

@media (max-width: 639px) {
  .nav__logo,
  .nav.is-scrolled .nav__logo-dark,
  .nav.is-scrolled .nav__logo-light {
    display: none;
  }

  .nav__icon-dark {
    display: block;
  }
  .nav__icon-light {
    display: none;
  }
  .nav.is-scrolled .nav__icon-dark {
    display: none;
  }
  .nav.is-scrolled .nav__icon-light {
    display: block;
  }
}

.nav__links {
  display: none;
}

@media (min-width: 760px) {
  .nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--step--1);
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .nav__links a {
    opacity: 0.85;
    transition: opacity var(--dur-fast) var(--ease-out-quart);
  }
  .nav__links a:hover {
    opacity: 1;
  }
}

.nav__cta {
  padding: 0.7em 1.4em;
  font-size: 0.72rem;
  border-radius: 0;
}

/* ---- Tag chips (temas) ---- */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.tag {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: 0.02em;
  border-radius: 999px;
  padding: 0.6em 1.3em;
  border: 1.5px solid transparent;
}

.tag--lg {
  font-size: var(--step-1);
}
.tag--md {
  font-size: var(--step-0);
}
.tag--sm {
  font-size: var(--step--1);
  text-transform: uppercase;
}

.tag--fill-ink {
  background: var(--ink);
  color: var(--cream);
}
.tag--fill-orange {
  background: var(--orange);
  color: var(--ink);
}
.tag--outline {
  border-color: color-mix(in oklch, var(--ink) 30%, transparent);
  color: var(--ink);
}

/* ---- Platform row ---- */
.platform-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-5);
}

.platform-row__item {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step-0);
  color: var(--text-on-light);
  filter: grayscale(1);
  opacity: 0.6;
  transition: opacity var(--dur-fast) var(--ease-out-quart),
    filter var(--dur-fast) var(--ease-out-quart);
}

a.platform-row__item:hover,
a.platform-row__item:focus-visible {
  filter: grayscale(0);
  opacity: 1;
  color: var(--accent-hover);
}

.platform-row__item[aria-disabled="true"] {
  opacity: 0.35;
  cursor: default;
}

.platform-row__icon {
  width: 22px;
  height: 22px;
  flex: none;
}

/* ---- Footer ---- */
.footer {
  background: var(--ink);
  color: var(--text-on-dark-muted);
  padding-block: var(--space-6);
}

.footer__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--hairline-on-dark);
  margin-bottom: var(--space-4);
}

.footer__logo {
  height: 32px;
  width: auto;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-family: var(--font-display);
  font-size: var(--step--1);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.footer__links a:hover {
  color: var(--orange);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  font-size: var(--step--1);
}