/* ---------- Design tokens ---------- */
:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "Inter", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --max-w: 1100px;
  --gutter: clamp(1rem, 3vw, 2rem);
  --rhythm: 1.6;

  --radius: 2px;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.6);

  --transition: 200ms ease;
}

html[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-elev: #141414;
  --fg: #ededed;
  --fg-muted: #9b9b9b;
  --fg-dim: #6a6a6a;
  --border: #222;
  --accent: #ededed;
  --overlay: rgba(5, 5, 5, 0.96);
}

html[data-theme="light"] {
  --bg: #fafafa;
  --bg-elev: #ffffff;
  --fg: #141414;
  --fg-muted: #555;
  --fg-dim: #8a8a8a;
  --border: #e5e5e5;
  --accent: #141414;
  --overlay: rgba(250, 250, 250, 0.98);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img, svg, picture, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6, p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- Base ---------- */
html { color-scheme: dark light; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: var(--rhythm);
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background var(--transition), color var(--transition);
}

main { min-height: 60vh; }

/* ---------- Header ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem var(--gutter);
  max-width: var(--max-w);
  margin: 0 auto;
}

.site-brand {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  color: var(--fg-dim);
}
.brand-mark {
  width: 7px;
  height: 7px;
  border: 1px solid currentColor;
  border-radius: 50%;
  transition: color var(--transition), transform var(--transition);
}
.site-brand:hover .brand-mark {
  color: var(--fg);
  transform: scale(1.15);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.site-nav ul { display: flex; gap: 1.25rem; }
.site-nav a {
  font-size: 0.85rem;
  color: var(--fg-muted);
  transition: color var(--transition);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover { color: var(--fg); }
.site-nav a[aria-current="page"] {
  color: var(--fg);
  border-bottom-color: var(--fg);
}

.theme-toggle {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  color: var(--fg-muted);
  border-radius: 50%;
  transition: color var(--transition), background var(--transition);
}
.theme-toggle:hover { color: var(--fg); background: var(--bg-elev); }
html[data-theme="dark"] .theme-toggle .icon-sun,
html[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* ---------- Home / series grid ---------- */
.home {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem var(--gutter) 5rem;
}
.series-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}
@media (min-width: 720px) {
  .series-grid { grid-template-columns: repeat(2, 1fr); gap: 3.5rem 2rem; }
}

.series-card { }
.series-link { display: block; }
.series-cover {
  overflow: hidden;
  background: var(--bg-elev);
  aspect-ratio: 3 / 2;
}
.series-cover picture, .series-cover .series-cover-img { height: 100%; }
.series-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 600ms cubic-bezier(.2,.6,.2,1), filter var(--transition);
  filter: saturate(0.95);
}
.series-link:hover .series-cover img {
  transform: scale(1.02);
  filter: saturate(1);
}

.series-card-body { padding-top: 1rem; }
.series-card-title {
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.series-card-meta {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--fg-dim);
  margin-top: 0.25rem;
}
.series-card-desc {
  font-size: 0.9rem;
  color: var(--fg-muted);
  margin-top: 0.5rem;
  opacity: 0;
  transform: translateY(2px);
  transition: opacity var(--transition), transform var(--transition);
}
.series-card:hover .series-card-desc,
.series-card:focus-within .series-card-desc {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .series-card-desc { opacity: 1; transform: none; }
}
@media (hover: none), (pointer: coarse), (max-width: 719px) {
  .series-card-desc { opacity: 1; transform: none; }
}

.empty-state {
  max-width: 60ch;
  margin: 4rem auto;
  text-align: center;
  color: var(--fg-muted);
}
.empty-state code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-elev);
  padding: 0.1em 0.4em;
  border-radius: var(--radius);
}

/* ---------- Series page ---------- */
.series {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1rem var(--gutter) 5rem;
}
.series-header {
  text-align: center;
  margin: 2rem auto 4rem;
  max-width: 60ch;
}
.series-meta {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--fg-dim);
  margin-bottom: 0.75rem;
}
.series-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.15;
}
.series-description {
  margin-top: 1rem;
  color: var(--fg-muted);
  font-size: 1.05rem;
}

.photo-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}
.photo {
  margin: 0;
  max-width: 100%;
  cursor: zoom-in;
}
.photo picture, .photo img {
  width: 100%;
  height: auto;
}
.photo img {
  background-color: var(--bg-elev);
}
.photo figcaption {
  margin-top: 0.75rem;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--fg-dim);
  text-align: center;
}

.series-nav {
  margin-top: 5rem;
  text-align: center;
  font-size: 0.85rem;
}
.back-link {
  color: var(--fg-muted);
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.back-link:hover { color: var(--fg); border-bottom-color: var(--fg); }

/* ---------- Page (about/contact) ---------- */
.page {
  max-width: 65ch;
  margin: 0 auto;
  padding: 3rem var(--gutter) 5rem;
}
.page-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 400;
  margin-bottom: 2rem;
}
.page-body p { margin-bottom: 1.2em; }
.page-body a {
  border-bottom: 1px solid var(--border);
  transition: border-color var(--transition);
}
.page-body a:hover { border-bottom-color: var(--fg); }

.contact-links {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0;
}
.page-body .contact-link {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.9rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 0;
  color: inherit;
}
.page-body .contact-link:last-child {
  border-bottom: 1px solid var(--border);
}
.contact-link-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  color: var(--fg-muted);
  font-size: 1rem;
  transition: border-color var(--transition), color var(--transition);
}
.contact-link-text {
  min-width: 0;
  display: grid;
  gap: 0.05rem;
}
.contact-link-label {
  font-size: 0.82rem;
  color: var(--fg);
}
.contact-link-value {
  overflow-wrap: anywhere;
  font-size: 0.9rem;
  color: var(--fg-muted);
}
.contact-link-arrow {
  color: var(--fg-dim);
  transition: color var(--transition), transform var(--transition);
}
.page-body .contact-link:hover .contact-link-icon,
.page-body .contact-link:focus-visible .contact-link-icon {
  border-color: var(--fg);
  color: var(--fg);
}
.page-body .contact-link:hover .contact-link-arrow,
.page-body .contact-link:focus-visible .contact-link-arrow {
  color: var(--fg);
  transform: translateX(2px);
}

/* ---------- Footer ---------- */
.site-footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem var(--gutter);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid var(--border);
  color: var(--fg-dim);
  font-size: 0.78rem;
  flex-wrap: wrap;
}
.site-footer .socials { display: flex; gap: 1rem; }
.site-footer a { border-bottom: 1px solid transparent; }
.site-footer a:hover { color: var(--fg); border-bottom-color: var(--fg); }

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  display: none;
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: clamp(1rem, 3vw, 2.5rem);
}
.lightbox[aria-hidden="false"] { display: flex; }
.lightbox-figure {
  margin: 0;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}
.lightbox-figure img {
  max-width: 100%;
  max-height: 85vh;
  width: auto;
  height: auto;
  object-fit: contain;
  box-shadow: var(--shadow);
}
.lightbox-figure figcaption {
  color: var(--fg-muted);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-align: center;
}

.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute;
  color: var(--fg-muted);
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  font-size: 1.8rem;
  line-height: 1;
  border-radius: 50%;
  transition: color var(--transition), background var(--transition), opacity var(--transition);
}
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover {
  color: var(--fg);
  background: var(--bg-elev);
}
.lightbox-close { top: 1rem; right: 1rem; }
.lightbox-prev { left: 1rem; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 1rem; top: 50%; transform: translateY(-50%); }

@media (hover: hover) {
  .lightbox-prev, .lightbox-next { opacity: 0.25; }
  .lightbox:hover .lightbox-prev, .lightbox:hover .lightbox-next { opacity: 1; }
}

body.lightbox-open { overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}