/*
  Global styles — friend-portfolio
  Reset, page typography, nav, footer and scroll-reveal.
*/

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

html,
body {
  margin: 0;
  padding: 0;
}

body,
body * {
  letter-spacing: var(--tracking);
}

body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-weight: var(--weight);
  font-size: var(--text-s);
  -webkit-font-smoothing: antialiased;
}

h1, h2 {
  font-weight: inherit;
  font-size: inherit;
}

h1, h2, p, ul {
  margin: 0;
  padding: 0;
}

ul { list-style: none; }

a {
  color: inherit;
  text-decoration: none;
}

img { display: block; }

:focus-visible {
  outline: var(--focus-w) solid var(--color-ink);
  outline-offset: var(--focus-offset);
}

/* ---------- Nav ---------- */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  padding: var(--nav-pad-y) var(--gutter);
  background: var(--color-bg);
}

.nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__left,
.nav__center {
  display: flex;
  align-items: center;
}

.nav__left { gap: var(--gap-l); }
.nav__center { gap: var(--gap-m); }

.nav__logo {
  font-size: var(--text-m);
  line-height: var(--lh-tight);
}

.clock {
  display: flex;
  justify-content: center;
  width: var(--clock-w);
  line-height: var(--lh-tight);
}

.nav__link {
  display: flex;
  flex-direction: column;
  gap: var(--gap-xs);
  line-height: var(--lh-tight);
}

.nav__link::after {
  content: "";
  height: var(--underline);
  background: var(--color-ink);
  opacity: 0;
  transform: scaleX(0);
  transition: transform var(--dur-link) var(--ease-link), opacity var(--dur-link) var(--ease-link);
}

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

/* ---------- Footer ---------- */

.footer {
  padding: var(--footer-pad) var(--gutter);
  background: var(--color-bg);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  height: var(--footer-h);
  max-width: var(--footer-max);
  margin: 0 auto;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-self: stretch;
}

.footer__logo {
  font-size: var(--text-xl);
  line-height: var(--lh-tight);
  letter-spacing: -0.03em;
}

.footer__copy,
.footer__social a {
  color: var(--color-muted);
}

.footer__copy,
.footer__list p {
  line-height: var(--lh-tight);
}

.footer__links {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-self: stretch;
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--gap-s);
}

.footer__social a {
  transition: color var(--dur-link) var(--ease-link);
}

.footer__social a:hover,
.footer__social a:focus-visible {
  color: var(--color-ink);
}

.to-top {
  display: flex;
  align-items: center;
  gap: var(--gap-s);
  line-height: var(--lh-tight);
}

.to-top svg {
  width: var(--icon);
  height: var(--icon);
  transform: rotate(-45deg);
}

/* ---------- Scroll reveal (JS adds .js to <html>) ---------- */

.js .reveal {
  opacity: 0;
  transition: opacity var(--dur-reveal) var(--ease), transform var(--dur-reveal) var(--ease);
}

.js .reveal--up { transform: translateY(var(--reveal-up)); }
.js .reveal--down { transform: translateY(var(--reveal-hero)); }
.js .nav.reveal--down { transform: translateY(var(--reveal-nav)); }

.js .reveal--down { transition-delay: var(--delay-reveal); }

.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal,
  .nav__link::after,
  .footer__social a {
    transition: none;
  }
  .js .reveal {
    opacity: 1;
    transform: none;
  }
}
