/* ============ Navigation ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  background: rgba(253, 248, 236, 0.0);
  backdrop-filter: blur(0);
  -webkit-backdrop-filter: blur(0);
  border-bottom: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
}
.nav.scrolled {
  background: rgba(253, 248, 236, 0.85);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: rgba(232, 225, 205, 0.9);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--serif);
  font-size: 1.3rem;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.brand-mark {
  width: 38px; height: 38px;
  flex: none;
}
.brand-mark svg { width: 100%; height: 100%; }
.brand-name {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  letter-spacing: 0.06em;
}
.brand-name b { font-weight: 500; color: var(--ink); }
.brand-name span { font-weight: 300; color: var(--muted); font-size: 0.95rem; }

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2.4rem);
  list-style: none;
  padding: 0;
}
.nav-links a {
  font-size: var(--step--1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  position: relative;
  padding: 0.4rem 0;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: var(--sky-deep);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav-links a:hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.nav-links a.active { color: var(--ink); }

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
  background: rgba(255, 253, 246, 0.6);
}
.lang-toggle button {
  border: 0;
  background: transparent;
  padding: 0.35rem 0.85rem;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.lang-toggle button.on {
  background: var(--ink);
  color: var(--ivory);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  width: 40px; height: 40px;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 8px; right: 8px;
  height: 1.5px;
  background: var(--ink);
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast) var(--ease), top var(--dur) var(--ease);
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 19px; }
.nav-toggle span:nth-child(3) { top: 24px; }
.nav-toggle.open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    flex-direction: column;
    gap: 0;
    padding: 2.5rem var(--gutter);
    background: var(--ivory);
    border-top: 1px solid var(--line);
    transform: translateY(-110%);
    transition: transform var(--dur) var(--ease);
  }
  .nav-links.open { transform: none; }
  .nav-links li { width: 100%; border-bottom: 1px solid var(--line-soft); }
  .nav-links a {
    display: block;
    padding: 1.2rem 0;
    font-family: var(--serif);
    font-size: 1.4rem;
    letter-spacing: 0.04em;
    text-transform: none;
  }
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.95rem 1.7rem;
  font-size: var(--step--1);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--ink);
  color: var(--ivory);
  border-color: var(--ink);
}
.btn-primary:hover {
  background: var(--sky-deep);
  border-color: var(--sky-deep);
  color: var(--ivory);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover {
  border-color: var(--ink);
  background: var(--ivory);
}
.btn .arrow {
  transition: transform var(--dur) var(--ease);
}
.btn:hover .arrow { transform: translateX(4px); }

/* ============ Footer ============ */
.footer {
  background: var(--ink);
  color: var(--ivory);
  padding: clamp(3rem, 7vw, 5.5rem) 0 2rem;
}
.footer .container {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.footer h5 {
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sky-soft);
  margin-bottom: 1.1rem;
  font-weight: 500;
}
.footer .brand-name b { color: var(--ivory); }
.footer .brand-name span { color: rgba(255, 253, 246, 0.5); }
.footer ul { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 0.7rem; }
.footer a { color: rgba(255, 253, 246, 0.7); font-size: 0.95rem; }
.footer a:hover { color: var(--sky); }
.footer .tagline {
  font-family: var(--serif);
  font-size: 1.3rem;
  line-height: 1.5;
  color: rgba(255, 253, 246, 0.85);
  max-width: 24ch;
  margin-top: 1rem;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 253, 246, 0.1);
  margin-top: 3rem;
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: rgba(255, 253, 246, 0.4);
  letter-spacing: 0.05em;
}
@media (max-width: 720px) {
  .footer .container { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 0.8rem; text-align: center; }
}

/* ============ Page header (non-home) ============ */
.page-head {
  padding-top: calc(var(--nav-h) + clamp(3rem, 7vw, 5rem));
  padding-bottom: clamp(2rem, 5vw, 4rem);
  text-align: center;
}
.page-head h1 {
  font-size: var(--step-5);
  margin-top: 0.6rem;
}
.page-head .subtitle {
  font-family: var(--serif);
  font-style: italic;
  font-size: var(--step-1);
  color: var(--muted);
  margin-top: 0.6rem;
}
.divider {
  width: 1px;
  height: 64px;
  background: linear-gradient(to bottom, transparent, var(--sky), transparent);
  margin: 2rem auto;
}

/* ============ Lightbox ============ */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(12, 14, 20, 0.94);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.lightbox.open { display: flex; opacity: 1; }
.lightbox img {
  max-width: 92vw;
  max-height: 88vh;
  object-fit: contain;
  border-radius: 4px;
}
.lightbox-close {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  background: transparent;
  border: 1px solid rgba(255, 253, 246, 0.3);
  color: var(--ivory);
  width: 44px; height: 44px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  transition: all var(--dur-fast) var(--ease);
}
.lightbox-close:hover { background: var(--ivory); color: var(--ink); }