:root {
  --bg: #ffffff;
  --bg-alt: #fafaf9;
  --bg-card: #ffffff;
  --border: #e5e5e2;
  --border-muted: #f2f2f0;
  --text-primary: #111110;
  --text-secondary: #555450;
  --text-muted: #888780;
  --teal: #0D7A57;
  --teal-dark: #085041;
  --purple: #4338CA;
  --purple-dark: #312E81;
  --max-w: 680px;
  --nav-h: 52px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 0 2rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-muted);
}

.nav-inner {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--text-primary); }

@media (max-width: 480px) {
  .nav-links { display: none; }
}

/* ── Layout ── */
.section {
  padding: 4.5rem 2rem;
  border-bottom: 1px solid var(--border-muted);
}
.section:last-of-type { border-bottom: none; }

.inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

/* ── Section Headings ── */
.section-heading {
  font-size: 1.125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

/* ── Tags ── */
.card-tags, .tags {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.875rem;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.tag-product   { background: rgba(13, 122, 87, 0.08);  color: var(--teal); }
.tag-skill     { background: rgba(67, 56, 202, 0.08);  color: var(--purple); }
.tag-tool      { background: rgba(136, 135, 128, 0.08); color: var(--text-muted); }
.tag-live      { background: rgba(13, 122, 87, 0.06);  color: var(--teal); }
.tag-discovery { background: rgba(176, 138, 48, 0.1);   color: #b08a30; }
.tag-active    { background: rgba(67, 56, 202, 0.06);  color: var(--purple); }
.tag-github    { background: rgba(17, 17, 16, 0.05);  color: var(--text-primary); border: 1px solid var(--border); text-decoration: none; }

/* ── Typography Helpers ── */
em { color: var(--text-primary); font-style: italic; }
strong { color: var(--text-primary); font-weight: 600; }

/* ── Detail Page Specific ── */
.page {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 6rem 2rem 8rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: 4rem;
  transition: color 0.15s;
}
.back-link::before { content: '←'; }
.back-link:hover { color: var(--text-primary); }

.page-label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.page h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
}

.body-copy p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1.0625rem;
}
.body-copy p:last-child { margin-bottom: 0; }

.placeholder {
  margin-top: 3rem;
  padding: 1.5rem;
  border: 1px dashed var(--border);
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ── Modal Styles ── */
#imageModal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  cursor: zoom-out;
  overflow: auto;
  padding: 4rem 2rem;
}
#modalImg {
  display: block;
  margin: auto;
  max-width: 1200px;
  width: 100%;
  height: auto;
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  border-radius: 8px;
}
.modal-close {
  position: fixed;
  top: 2rem;
  right: 2.5rem;
  font-size: 2.5rem;
  font-weight: 200;
  color: var(--text-muted);
  cursor: pointer;
  line-height: 1;
}