/* ---------- Design tokens ---------- */
:root {
  --color-bg: #ffffff;
  --color-text: #111111;
  --color-muted: #6b6b6b;
  --color-border: #e5e5e5;
  --color-accent: #4fd1a5;
  --header-h: 64px;
  --font-sans: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Instrument Serif', serif;
  --row-h: clamp(220px, 34vw, 480px);
  --gutter: 8px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }

a { color: inherit; }

h1, h2, h3, p { margin: 0; }

h1, h2, h3 { font-family: var(--font-heading); }

.eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 0.75rem;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: rgba(255, 255, 255, 0.96);
  padding: 0.9rem 1.5rem 0.9rem 1.25rem;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.06);
}

.menu-toggle {
  width: 26px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 0;
  flex-shrink: 0;
}

.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.brand-logo {
  height: 34px;
  width: auto;
}

.brand-tagline {
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-top: 0.3rem;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--color-accent);
  z-index: 51;
  transition: width 0.1s linear;
}

/* ---------- Full-screen menu overlay ---------- */
.site-menu {
  position: fixed;
  inset: 0;
  background: var(--color-bg);
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}

.site-menu.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.site-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: center;
}

.site-menu li { margin: 1.5rem 0; }

.site-menu a {
  font-size: clamp(1.75rem, 5vw, 3rem);
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 500;
}

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

/* ---------- Fixed filter panel (bottom-left, persists over the whole page) ---------- */
.filter-panel {
  position: fixed;
  z-index: 55;
  left: 1.25rem;
  bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.06);
}

.filter-bar {
  width: 100%;
}

.filter-toggle {
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.chevron {
  display: inline-block;
  transition: transform 0.2s ease;
}

.filter-toggle[aria-expanded="true"] .chevron {
  transform: rotate(90deg);
}

.filter-options {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.45rem;
  margin-top: 0.6rem;
}

.filter-options[hidden] {
  display: none;
}

.filter-btn {
  border: 1px solid var(--color-border);
  background: none;
  padding: 0.3rem 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.filter-btn.is-active,
.filter-btn:hover {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
}

/* ---------- Gallery (one carousel row per session, filename order) ---------- */
.work {
  /* Clears the fixed header — kept in sync with its real rendered height by
     syncHeaderHeight() in main.js, so the first row always starts exactly
     one header-height below the top of the page. */
  padding-top: var(--header-h);
}

.gallery-block.is-hidden { display: none; }

.gallery-block {
  /* Padding lives here rather than on .gallery-row-group: browsers drop the
     start-side padding of a horizontally-scrolling flex container at rest. */
  padding-left: 1.25rem;
}

.gallery-row-group {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  gap: var(--gutter);
}

.gallery-item {
  height: var(--row-h);
  flex: 0 0 auto;
  overflow: hidden;
  position: relative;
  cursor: pointer;
  scroll-snap-align: start;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  transition: transform 0.5s ease, opacity 0.6s ease;
  opacity: 0;
}

.gallery-item.is-visible img {
  opacity: 1;
}

.gallery-item:hover img {
  transform: scale(1.04);
}

/* ---------- About ---------- */
.about {
  padding: 6rem 1.5rem;
  border-top: 1px solid var(--color-border);
}

.about-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.about h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.about-text {
  color: var(--color-muted);
  line-height: 1.8;
  font-size: 0.95rem;
}

.about-edit-note {
  margin-top: 1rem;
  font-size: 0.8rem;
  font-style: italic;
}

/* ---------- Contact ---------- */
.contact {
  padding: 6rem 1.5rem 7rem;
  background: #fafafa;
  border-top: 1px solid var(--color-border);
}

.contact-inner {
  max-width: 520px;
  margin: 0 auto;
}

.contact .eyebrow,
.contact h2 {
  text-align: center;
}

.contact h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 500;
  margin-bottom: 2rem;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 2.5rem 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.footer-links {
  margin-top: 0.5rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--color-accent); }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 90vw;
  max-height: 88vh;
  object-fit: contain;
}

.lightbox-close,
.lightbox-nav {
  position: absolute;
  background: none;
  border: none;
  color: #fff;
  font-size: 2.5rem;
  cursor: pointer;
  line-height: 1;
  padding: 0.5rem;
}

.lightbox-close { top: 1rem; right: 1.25rem; font-size: 2rem; }
.lightbox-prev { left: 1rem; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 1rem; top: 50%; transform: translateY(-50%); }

.lightbox-caption {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: #fff;
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .site-header {
    padding: 0.6rem 1rem 0.6rem 0.75rem;
    gap: 0.85rem;
  }
  .brand-logo { height: 26px; }
  .brand-tagline { font-size: 0.55rem; }

  :root {
    --row-h: 220px;
    --gutter: 4px;
  }

  .gallery-block {
    padding-left: 0.75rem;
  }

  .filter-panel {
    left: 0.75rem;
    bottom: 0.75rem;
    padding: 0.6rem 0.75rem;
    max-width: 9rem;
  }

  .about, .contact { padding: 4rem 1.25rem; }

  .lightbox-prev, .lightbox-next { font-size: 1.8rem; }
}