:root {
  --ink: #1a1a1a;
  --muted: #6b6b6b;
  --line: #e6e6e6;
  --bg: #ffffff;
  --accent: #1a1a1a;
  --maxw: 1100px;
  --gap: 1.5rem;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--font-body);
  line-height: 1.55;
  font-size: 16px;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }

/* ---------- Header / nav ---------- */
.site-header {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.25rem 1rem;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

.brand {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.25rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.site-nav a:hover { color: var(--ink); border-bottom-color: var(--ink); }
.site-nav a.active { color: var(--ink); font-weight: 600; border-bottom-color: var(--ink); }

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: none;
  border-radius: 999px;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  cursor: pointer;
}

@media (max-width: 900px) {
  .site-header {
    flex-direction: column;
    align-items: center;
  }
  .site-nav { justify-content: center; }
}

@media (max-width: 600px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .nav-toggle-icon,
  .nav-toggle-icon::before,
  .nav-toggle-icon::after {
    display: block;
    width: 1.1rem;
    height: 2px;
    background: var(--ink);
  }
  .nav-toggle-icon {
    position: relative;
  }
  .nav-toggle-icon::before,
  .nav-toggle-icon::after {
    content: "";
    position: absolute;
    left: 0;
  }
  .nav-toggle-icon::before { top: -6px; }
  .nav-toggle-icon::after { top: 6px; }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: center;
  }
  .site-nav.is-open { display: flex; }
}

/* ---------- Main ---------- */
.site-main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.intro { margin-bottom: 2rem; }
.intro h1 { font-family: var(--font-title); font-size: 1.9rem; font-weight: 600; margin: 0 0 0.5rem; letter-spacing: -0.02em; }
.prose { color: var(--muted); }
.prose p { margin: 0 0 1rem; }
.prose h3, .prose h4, .prose h5 {
  font-family: var(--font-title);
  font-weight: 600;
  color: var(--ink);
  margin: 1.5rem 0 0.75rem;
  letter-spacing: -0.01em;
}
.prose h3 { font-size: 1.3rem; }
.prose h4 { font-size: 1.1rem; }
.prose h5 { font-size: 1rem; }
.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: #f3f3f3;
  padding: 0.1em 0.35em;
  border-radius: 4px;
}
.prose hr { border: none; border-top: 1px solid var(--line); margin: 1.75rem 0; }
.prose-image { margin: 1.5rem 0; }
.prose-image img { width: 100%; border-radius: var(--radius); }

/* ---------- Card grid ---------- */
.card-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--gap);
}

.card a {
  display: block;
  text-decoration: none;
  color: inherit;
}

.card-media {
  overflow: hidden;
  background: #f3f3f3;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.card a:hover .card-media img { transform: scale(1.04); }

.card-title {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--font-title);
  font-size: 1.02rem;
  font-weight: 600;
}

/* ---------- Project page ---------- */
.project-header { margin-bottom: 1.5rem; }
.project-header h1 { font-family: var(--font-title); font-size: 1.9rem; font-weight: 600; margin: 0 0 0.4rem; letter-spacing: -0.02em; }
.project-tag {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  margin: 0 0.4rem 0.4rem 0;
}
.project-tag:hover { color: var(--ink); border-color: var(--ink); }

.project-cover { margin: 0 0 1.5rem; }
.project-cover img { border-radius: var(--radius); }

.gallery {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
}
.gallery img { aspect-ratio: 1 / 1; object-fit: cover; width: 100%; border-radius: var(--radius); }
.gallery a { cursor: zoom-in; }

/* ---------- Lightbox (gallery) ---------- */
.lightbox {
  border: none;
  padding: 0;
  background: transparent;
  max-width: 92vw;
  max-height: 92vh;
}
.lightbox::backdrop { background: rgba(0, 0, 0, 0.85); }
.lightbox img { display: block; max-width: 92vw; max-height: 92vh; margin: 0 auto; }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: fixed;
  border: none;
  background: rgba(0, 0, 0, 0.4);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  cursor: pointer;
}
.lightbox-close { top: 1.25rem; right: 1.25rem; }
.lightbox-prev, .lightbox-next { top: 50%; transform: translateY(-50%); }
.lightbox-prev { left: 1.25rem; }
.lightbox-next { right: 1.25rem; }
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: rgba(0, 0, 0, 0.65); }

/* ---------- Free page ---------- */
.free-page h1 { font-family: var(--font-title); font-size: 1.9rem; font-weight: 600; letter-spacing: -0.02em; }
.page-cover { margin: 1rem 0 1.5rem; }
.page-cover img { border-radius: var(--radius); }

/* ---------- Footer ---------- */
.site-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

@media print {
  .site-nav, .site-footer { display: none; }
  a { color: #000; }
}