/* ---------- Base ---------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
:root {
  --text: #1b1b1b;
  --muted: #5a5a5a;
  --border: #e9e9e9;
  --primary: #2b66d5;
  --radius: 16px;

  --space-1: clamp(0.6rem, 0.5rem + 0.3vw, 0.8rem);
  --space-2: clamp(1rem, 0.9rem + 0.5vw, 1.4rem);
  --space-3: clamp(1.6rem, 1.3rem + 1vw, 2.2rem);
  --space-4: clamp(2.4rem, 1.8rem + 2vw, 3.4rem);

  --fs-0: clamp(0.98rem, 0.9rem + 0.3vw, 1.06rem);
  --fs-1: clamp(1.15rem, 1rem + 0.6vw, 1.35rem);
  --fs-2: clamp(1.45rem, 1.2rem + 0.9vw, 1.9rem);
  --fs-3: clamp(2rem, 1.6rem + 1.8vw, 3rem);
}

body {
  margin: 0;
  background: #fff;                 /* pure white background */
  color: var(--text);
  font: 400 var(--fs-0)/1.6 ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, "Noto Sans";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  width: min(100% - 2rem, 900px);
  margin-inline: auto;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  padding: var(--space-1) 0;
}
h1 {
  margin: 0;
  font-size: var(--fs-3);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.tagline {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

/* ---------- Main ---------- */
main.container { padding: var(--space-3) 0 var(--space-4); }
section + section { margin-top: var(--space-4); }
h2 { font-size: var(--fs-2); margin: 0 0 var(--space-2); letter-spacing: -0.01em; }
p { margin: 0 0 var(--space-2); max-width: 68ch; }

/* ---------- Projects ---------- */
.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
}
@media (min-width: 720px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}
.project-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-2);
  background: #fff;
  box-shadow: 0 10px 30px rgba(0,0,0,0.06);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.project-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 40px rgba(0,0,0,.08);
  border-color: #dcdcdc;
}
.project-card h3 {
  margin: 0 0 0.4rem;
  font-size: var(--fs-1);
  letter-spacing: -0.01em;
}
.project-card p { margin: 0 0 var(--space-1); color: var(--muted); }

/* ---------- Links / button ---------- */
a { color: var(--primary); text-underline-offset: 3px; text-decoration-thickness: 2px; }
a:hover { text-decoration: underline; }
.project-link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  text-decoration: none; font-weight: 600;
  border: 1px solid var(--border);
  padding: 0.55rem 0.9rem; border-radius: 999px;
  transition: background .15s ease, transform .1s ease, border-color .2s ease;
}
.project-link:hover {
  background: #f6f8ff;
  border-color: #ccd7ff;
}
.project-link:active { transform: translateY(1px); }

/* ---------- Footer (full-bleed image with overlay credit) ---------- */
.site-footer {
  background: #fff;
  border-top: 1px solid #e9e9e9;
}

.footer-art {
  position: relative; /* needed for positioning the overlay box */
  margin: 0;
  padding: 0;
}

.footer-art picture,
.footer-art img {
  display: block;
  width: 100%;
  max-width: 4000px;
  margin-inline: auto;
  height: auto;
}

.footer-credit {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  background: rgba(255, 255, 255, 0.5);
  padding: 0.3rem 0.6rem;
  font-size: 0.85rem;
  color: rgba(0, 0, 0, 1);
  border-radius: 4px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}