:root {
  color-scheme: light dark;
  /* Spring palette — bright, but flat (no decorative gradients). */
  --bg: #f4ffeb;
  --bg-elev: #ffffff;
  --text: #082015;
  --text-dim: #4a6b58;
  --accent: #22c55e;        /* bright leaf green */
  --accent-strong: #16a34a;
  --accent-2: #38bdf8;       /* spring sky blue */
  --accent-2-strong: #0ea5e9;
  --accent-soft: rgba(34, 197, 94, 0.12);
  --accent-2-soft: rgba(56, 189, 248, 0.14);
  --border: #d6f5dd;
  --shadow: 0 1px 0 rgba(255,255,255,0.8) inset, 0 6px 18px rgba(15,90,40,0.06);
  --max-width: 920px;
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a261d;
    --bg-elev: #14392e;
    --text: #f0fdf4;
    --text-dim: #9bd0ae;
    --accent: #4ade80;
    --accent-strong: #86efac;
    --accent-2: #7dd3fc;
    --accent-2-strong: #bae6fd;
    --accent-soft: rgba(74, 222, 128, 0.14);
    --accent-2-soft: rgba(125, 211, 252, 0.14);
    --border: #1f4737;
    --shadow: 0 1px 0 rgba(255,255,255,0.04), 0 8px 22px rgba(0,0,0,0.35);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 96px;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  /* Match the photo's 4:3 ratio so the full image height is always visible.
     height anchors to 40vh; width follows. On narrow viewports max-width clamps
     and aspect-ratio shrinks height to match. */
  aspect-ratio: 4 / 3;
  height: 40vh;
  max-height: 40vh;
  width: auto;
  max-width: 100%;
  margin: 16px auto 24px;
  border-radius: var(--radius);
  overflow: hidden;
  isolation: isolate;
  box-shadow: var(--shadow);
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
}

/* Simple dark fade at the bottom only — purely functional, for caption legibility. */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 55%, rgba(0,0,0,0.50) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(0,0,0,0.45);
}

.hero-content-inner {
  width: 100%;
  padding: 22px 26px 20px;
}

.hero-content h1 {
  margin: 0 0 6px;
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  letter-spacing: -0.01em;
  line-height: 1.05;
}

.hero-content p {
  margin: 0;
  max-width: 60ch;
  color: #f6fff9;
  font-size: clamp(0.9rem, 1.4vw, 1rem);
}

/* ---------- Header / nav ---------- */

header.site-header {
  margin-bottom: 16px;
}

nav.toc {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

nav.toc a {
  font-size: 0.88rem;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 5px 11px;
  border-radius: 999px;
  color: var(--text-dim);
}

nav.toc a:hover {
  color: var(--accent-strong);
  text-decoration: none;
  border-color: var(--accent);
}

/* ---------- Category headings ---------- */

.category {
  margin: 32px 0 4px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  padding-left: 4px;
}

.category h2 {
  font-size: 1.4rem;
  margin: 0;
  letter-spacing: -0.01em;
  color: var(--accent-strong);
}

.category .count {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: var(--accent-strong);
  background: var(--accent-soft);
  border: 1px solid rgba(34,197,94,0.30);
  padding: 1px 8px;
  border-radius: 999px;
}

.category .desc {
  flex-basis: 100%;
  margin: 4px 0 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* ---------- App cards ---------- */

section.app {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 26px 22px;
  margin: 14px 0;
  box-shadow: var(--shadow);
}

section.app h2 {
  margin: 0 0 4px;
  font-size: 1.45rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

section.app .repo-path {
  color: var(--text-dim);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  margin: 0 0 12px;
}

section.app .tagline {
  color: var(--text);
  font-style: italic;
  margin: 0 0 12px;
  opacity: 0.88;
}

section.app h3 {
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--accent-strong);
  margin: 20px 0 8px;
}

section.app h3.optional {
  color: var(--accent-2-strong);
}

section.app ul {
  margin: 0;
  padding-left: 1.15rem;
}

section.app li {
  margin-bottom: 6px;
}

section.app li strong {
  color: var(--text);
  font-weight: 600;
}

section.app code {
  background: var(--accent-soft);
  color: var(--accent-strong);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.85em;
}

section.app .screenshot {
  margin: 4px 0 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg);
  max-width: 520px;
}

section.app .screenshot img {
  display: block;
  width: 100%;
  height: auto;
}

section.app .screenshot-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin: 4px 0 16px;
  max-width: 720px;
}

section.app .screenshot-row figure {
  margin: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg);
}

section.app .screenshot-row img {
  display: block;
  width: 100%;
  height: auto;
}

section.app .screenshot-row figcaption {
  font-size: 0.8em;
  color: var(--muted, #666);
  padding: 4px 8px 6px;
  text-align: center;
}

/* ---------- Tags ---------- */

.tag-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 0 0 12px;
}

.tag {
  font-size: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--accent-2-soft);
  color: var(--accent-2-strong);
  padding: 2px 9px;
  border-radius: 6px;
  border: 1px solid rgba(56,189,248,0.30);
}

.tag.platform {
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-color: rgba(34,197,94,0.30);
}

/* ---------- Responsive ---------- */

@media (max-width: 600px) {
  .hero-content-inner { padding: 18px 20px 16px; }
  section.app { padding: 22px 22px 18px; }
  .category h2 { font-size: 1.25rem; }
}