/* ===== Design tokens ===== */
:root {
  --bg: #ffffff;
  --fg: #111111;
  --muted: #777777;
  --border: #ececec;
  --font-sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --nav-height: 56px;
  --gap: 14px;
  --max-width: 1500px;
  --radius: 2px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
img { background: #fafafa; }

/* ===== Layout ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: calc(var(--nav-height) + 40px) 24px 80px; }

/* ===== Nav ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-height);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  transition: transform 0.3s ease;
}
.nav.hidden { transform: translateY(-100%); }
.brand {
  font-size: 13px; font-weight: 600; letter-spacing: 0.18em;
}
.nav-links { list-style: none; display: flex; gap: 28px; }
.nav-links a {
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--muted); padding: 4px 0; border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.nav-links a:hover { color: var(--fg); }
.nav-links a.active { color: var(--fg); border-bottom-color: var(--fg); }

/* ===== Hero ===== */
#hero {
  position: relative; height: 100vh; min-height: 560px; overflow: hidden;
}
#hero img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-name {
  position: absolute; left: 0; right: 0; top: 50%; transform: translateY(-50%);
  text-align: center; color: #fff;
  font-size: clamp(28px, 5vw, 56px); font-weight: 600; letter-spacing: 0.22em;
  text-shadow: 0 1px 24px rgba(0,0,0,0.4);
}
.hero-tagline {
  position: absolute; left: 0; right: 0; top: calc(50% + 52px);
  text-align: center; color: #fff; font-size: 13px; letter-spacing: 0.2em;
  text-transform: uppercase; text-shadow: 0 1px 12px rgba(0,0,0,0.4);
}

/* ===== Masonry ===== */
.masonry { column-width: 320px; column-gap: var(--gap); }
.masonry-item { break-inside: avoid; margin: 0 0 var(--gap) 0; }
.masonry-item img { transition: opacity 0.25s ease; cursor: zoom-in; }
.masonry-item a img:hover, .masonry-item img:hover { opacity: 0.82; }
#home-gallery { padding: var(--gap); }

/* ===== Collections / Projects grid ===== */
.collection-heading {
  font-size: 13px; text-transform: uppercase; letter-spacing: 0.2em;
  font-weight: 600; margin: 56px 0 6px;
}
.collection-desc { color: var(--muted); font-size: 13px; margin-bottom: 24px; }
.cover-card { position: relative; }
.cover-card a img { transition: opacity 0.25s ease; }
.cover-card a:hover img { opacity: 0.78; }
.cover-caption {
  font-size: 12px; color: var(--muted); letter-spacing: 0.04em; margin-top: 6px;
}

/* ===== Project detail ===== */
.back-link {
  display: inline-block; font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.14em; color: var(--muted); margin-bottom: 32px;
}
.back-link:hover { color: var(--fg); }
.project-title { font-size: clamp(26px, 4vw, 42px); font-weight: 600; letter-spacing: 0.04em; }
.project-meta { color: var(--muted); font-size: 13px; margin-top: 6px; }
.project-desc { max-width: 640px; color: var(--fg); margin: 24px 0 40px; }
.project-video { margin: var(--gap) 0 40px; max-width: 1000px; }
.project-nav {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--border);
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted);
}
.project-nav a:hover { color: var(--fg); }

/* ===== Lightbox ===== */
.lightbox {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.94);
  display: flex; align-items: center; justify-content: center;
}
.lightbox[hidden] { display: none; }
.lightbox-img { max-width: 92vw; max-height: 88vh; width: auto; height: auto; }
.lightbox-btn {
  position: absolute; background: none; border: none; color: #fff;
  font-size: 40px; cursor: pointer; padding: 16px; line-height: 1;
  opacity: 0.7; transition: opacity 0.2s ease;
}
.lightbox-btn:hover { opacity: 1; }
.lightbox-btn.prev { left: 8px; top: 50%; transform: translateY(-50%); }
.lightbox-btn.next { right: 8px; top: 50%; transform: translateY(-50%); }
.lightbox-btn.close { top: 8px; right: 16px; font-size: 28px; }

/* ===== About ===== */
.about-heading, .contact-heading {
  font-size: 13px; text-transform: uppercase; letter-spacing: 0.2em; font-weight: 600;
  margin-bottom: 24px;
}
.about-text { max-width: 640px; margin-bottom: 56px; }
.about-text p { margin-bottom: 1.2em; }
.contact-heading { margin-bottom: 12px; }
.contact-links { display: flex; flex-wrap: wrap; gap: 24px; font-size: 13px; }
.contact-links a { border-bottom: 1px solid transparent; }
.contact-links a:hover { border-bottom-color: var(--fg); }

/* ===== Footer ===== */
#site-footer {
  text-align: center; padding: 48px 24px 56px;
  color: var(--muted); font-size: 13px;
  border-top: 1px solid var(--border); margin-top: 40px;
}
.footer-mail:hover { color: var(--fg); }
.footer-year { margin-top: 6px; font-size: 12px; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .masonry { column-width: 50%; column-count: 2; column-gap: 10px; }
  .container { padding-left: 14px; padding-right: 14px; }
  .nav-links { gap: 18px; }
  #home-gallery { padding: 6px; }
}
@media (max-width: 480px) {
  .masonry { column-count: 1; column-width: auto; }
  .nav { padding: 0 14px; }
  .nav-links { gap: 14px; }
}