/* Page chrome: navigation + footer */

/* ---------- Nav ---------- */
#nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: transform 0.6s var(--ease), background 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
}
#nav.is-scrolled {
  background: rgba(8, 8, 10, 0.72);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-color: var(--line);
}
#nav.is-hidden { transform: translateY(-100%); }

.nav__bar { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.nav__logo { display: flex; align-items: center; gap: 12px; font-weight: 600; letter-spacing: -0.02em; }
.nav__mark {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: 12px;
  background: var(--accent); color: var(--accent-ink);
  font-family: var(--font-serif); font-style: italic; font-size: 1.35rem; line-height: 1;
  transition: transform 0.6s var(--ease), border-radius 0.6s var(--ease);
}
.nav__logo:hover .nav__mark { transform: rotate(-8deg) scale(1.06); border-radius: 50%; }

.nav__links {
  display: flex;
  gap: 4px;
  padding: 5px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}
.nav__link {
  position: relative;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--muted);
  transition: color 0.3s, background 0.3s;
}
.nav__link:hover { color: var(--text); }
.nav__link.is-active { color: var(--text); background: rgba(255, 255, 255, 0.08); }

.nav__right { display: flex; align-items: center; gap: 12px; }

.nav__burger { display: none; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-2); position: relative; }
.nav__burger span {
  position: absolute; left: 13px; right: 13px; height: 1.5px; background: var(--text);
  transition: transform 0.5s var(--ease), top 0.5s var(--ease);
}
.nav__burger span:nth-child(1) { top: 18px; }
.nav__burger span:nth-child(2) { top: 25px; }
.menu-open .nav__burger span:nth-child(1) { top: 21.5px; transform: rotate(45deg); }
.menu-open .nav__burger span:nth-child(2) { top: 21.5px; transform: rotate(-45deg); }

.nav__sheet {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: rgba(8, 8, 10, 0.96);
  backdrop-filter: blur(20px);
  clip-path: circle(0% at calc(100% - 44px) 38px);
  transition: clip-path 0.8s var(--ease);
  display: flex;
  align-items: center;
}
.menu-open .nav__sheet { clip-path: circle(150% at calc(100% - 44px) 38px); }
.menu-open { overflow: hidden; }
.nav__sheet-inner { display: flex; flex-direction: column; gap: 6px; }
.nav__sheet-link {
  display: flex; align-items: baseline; gap: 16px;
  font-size: clamp(2.2rem, 10vw, 3.4rem); font-weight: 600; letter-spacing: -0.04em; line-height: 1.15;
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.5s, transform 0.7s var(--ease), color 0.3s;
}
.nav__sheet-link span { font-family: var(--font-mono); font-size: 0.8rem; color: var(--dim); letter-spacing: 0; }
.nav__sheet-link:hover { color: var(--accent); }
.menu-open .nav__sheet-link { opacity: 1; transform: none; transition-delay: calc(0.15s + var(--i) * 0.06s); }
.nav__sheet-cta { margin-top: 28px; align-self: flex-start; }

/* Scroll progress bar */
.progress {
  position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 60;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  transform-origin: 0 50%; transform: scaleX(0);
}

/* ---------- Footer ---------- */
#footer { border-top: 1px solid var(--line); background: var(--bg); overflow: hidden; }
.footer { padding-top: 72px; }
.footer__top { display: grid; grid-template-columns: 1.4fr 1fr auto; gap: 40px; align-items: start; }
.footer__tagline { font-size: 1.4rem; letter-spacing: -0.03em; font-weight: 500; max-width: 340px; line-height: 1.25; }
.footer__mail {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 16px;
  color: var(--muted); border-bottom: 1px solid var(--line-2); padding-bottom: 2px;
  transition: color 0.3s, border-color 0.3s;
}
.footer__mail svg { width: 16px; height: 16px; }
.footer__mail:hover { color: var(--accent); border-color: var(--accent); }
.footer__nav { display: grid; grid-template-columns: repeat(2, auto); gap: 10px 40px; justify-content: start; }
.footer__nav a { color: var(--muted); transition: color 0.3s; }
.footer__nav a:hover { color: var(--text); }
.footer__socials { display: flex; gap: 10px; }
.footer__socials a {
  display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%;
  border: 1px solid var(--line-2); color: var(--muted);
  transition: color 0.3s, border-color 0.3s, background 0.3s, transform 0.45s var(--ease);
}
.footer__socials a:hover { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
.footer__socials svg { width: 20px; height: 20px; }

.footer__word {
  margin-top: 56px;
  font-size: clamp(3.4rem, 15.5vw, 15rem);
  font-weight: 700;
  letter-spacing: -0.065em;
  line-height: 0.8;
  white-space: nowrap;
  text-align: center;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.01) 85%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  user-select: none;
}
.footer__bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 26px 0 32px; border-top: 1px solid var(--line);
  font-size: 0.85rem; color: var(--dim);
}
.footer__top-link { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); transition: color 0.3s; }
.footer__top-link svg { width: 15px; height: 15px; }
.footer__top-link:hover { color: var(--accent); }

@media (max-width: 960px) {
  .nav__links { display: none; }
  .nav__burger { display: block; }
  .nav__right .btn { display: none; }
  .footer__top { grid-template-columns: 1fr; }
}
@media (min-width: 961px) { .nav__sheet { display: none; } }