/* ============================================================
   rorystone.com — "Celluloid Geometry"
   Dark photography-gallery hub. Monochrome by conviction.
   Tokens track Rory-Stone/DesignSystem.swift (app ↔ site continuity).
   See DESIGN.md.
   ============================================================ */

:root {
  /* Color — monochrome conviction */
  --void: #141414;            /* default page bg */
  --gallery-black: #000000;   /* full-bleed photography only */
  --surface: #1E1E1E;
  --surface-2: #2A2A2A;
  --line: #333333;            /* dividers, film-strip, hairlines (== app bg grey) */
  --text: #FFFFFF;
  --text-2: #999999;
  --text-3: #737373;
  --accent: #FFFFFF;
  --accent-fg: #141414;
  --ov-1: rgba(255,255,255,0.05);
  --ov-2: rgba(255,255,255,0.10);
  --ov-3: rgba(255,255,255,0.15);

  /* Type */
  --font-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "Space Mono", "SFMono-Regular", ui-monospace, monospace;

  /* Spacing */
  --s-xs: 0.25rem; --s-sm: 0.5rem; --s-md: 1rem; --s-lg: 1.5rem;
  --s-xl: 2rem; --s-xxl: 3rem; --s-section: 8rem;
  --container: 1240px;
  --pad: 1.5rem;

  --radius: 0;            /* geometric discipline */
  --pill: 9999px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--void);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--text); color: var(--void); }

img { max-width: 100%; display: block; }

a { color: var(--text); text-decoration: none; transition: color var(--transition); }

/* ---------- Layout primitives ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--pad); }
.section { padding: var(--s-section) 0; }
.section--tight { padding: var(--s-xxl) 0; }

/* ---------- Type ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: 0.01em;
}
h1, h2, h3 { font-family: var(--font-display); font-weight: 300; line-height: 1.1; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }

.hero-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: 0.04em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-3);
  display: inline-block;
}
.eyebrow .count { color: var(--text-2); }

.lede { font-size: 1.15rem; color: var(--text-2); max-width: 60ch; }
.muted { color: var(--text-2); }
.tertiary { color: var(--text-3); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8125rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.btn--primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.btn--primary:hover { background: transparent; color: var(--text); border-color: var(--text); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--text); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(20,20,20,0.85);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  max-width: var(--container); margin: 0 auto; padding: 0 var(--pad);
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.wordmark {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-size: 0.8125rem;
  color: var(--text);
}
.nav__links { display: flex; gap: 1.75rem; list-style: none; align-items: center; }
.nav__links a {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.6875rem;
  color: var(--text-2);
}
.nav__links a:hover, .nav__links a.active { color: var(--text); }
.nav__toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav__toggle span { display: block; width: 22px; height: 1px; background: var(--text); margin: 5px 0; transition: var(--transition); }

@media (max-width: 760px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--void); border-bottom: 1px solid var(--line);
    flex-direction: column; gap: 0; padding: 0;
    max-height: 0; overflow: hidden; transition: max-height var(--transition);
  }
  .nav__links.open { max-height: 360px; }
  .nav__links li { width: 100%; border-top: 1px solid var(--line); }
  .nav__links a { display: block; padding: 1rem var(--pad); font-size: 0.8125rem; }
}

/* ---------- Film-strip rule (threshold marker) ---------- */
.filmstrip {
  height: 14px;
  background:
    repeating-linear-gradient(90deg,
      transparent 0, transparent 10px,
      var(--line) 10px, var(--line) 16px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  opacity: 0.6;
}

/* ---------- Home: spiral hero ---------- */
.hero {
  min-height: calc(100vh - 64px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; position: relative; padding: var(--s-xxl) var(--pad);
}
.hero__spiral { width: min(46vw, 360px); margin-bottom: var(--s-xl); color: var(--text); }
.hero__spiral path { fill: none; stroke: currentColor; stroke-width: 1.25; }
.hero__title { margin-bottom: var(--s-md); }
.hero__sub { font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.2em;
  font-size: 0.75rem; color: var(--text-2); }
.hero__scroll { position: absolute; bottom: 2rem; font-family: var(--font-mono);
  font-size: 0.625rem; letter-spacing: 0.2em; color: var(--text-3); text-transform: uppercase; }

/* draw-on (home only) */
@media (prefers-reduced-motion: no-preference) {
  .hero__spiral path { stroke-dasharray: 2400; stroke-dashoffset: 2400; animation: draw 3.2s ease forwards; }
  @keyframes draw { to { stroke-dashoffset: 0; } }
}

/* ---------- Pillar index (home) ---------- */
.pillars { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line);
  border: 1px solid var(--line); }
.pillar {
  background: var(--void); padding: var(--s-xxl) var(--s-xl); min-height: 220px;
  display: flex; flex-direction: column; justify-content: space-between;
  transition: background var(--transition);
}
.pillar:hover { background: var(--surface); }
.pillar__num { font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.2em;
  color: var(--text-3); }
.pillar__title { font-family: var(--font-display); font-weight: 300; font-size: 1.75rem; margin: var(--s-md) 0 var(--s-sm); }
.pillar__desc { color: var(--text-2); font-size: 0.95rem; margin-bottom: var(--s-md); }
.pillar__go { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-3); }
.pillar:hover .pillar__go { color: var(--text); }
@media (max-width: 640px) { .pillars { grid-template-columns: 1fr; } }

/* ---------- Section header ---------- */
.sh { margin-bottom: var(--s-xxl); }
.sh h2 { margin: var(--s-sm) 0; }
.sh p { color: var(--text-2); max-width: 60ch; }

/* ---------- Gallery (Photography) ---------- */
.gallery {
  columns: 3 280px; column-gap: 4px;
}
.gallery__item { break-inside: avoid; margin-bottom: 4px; position: relative; cursor: pointer;
  background: var(--gallery-black); overflow: hidden; }
.gallery__item img { width: 100%; transition: opacity var(--transition), transform 0.6s ease; }
.gallery__item:hover img { opacity: 0.82; transform: scale(1.02); }
.gallery__cap {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 0.75rem;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
  font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.08em;
  color: var(--text-2); text-transform: uppercase; opacity: 0; transition: opacity var(--transition);
}
.gallery__item:hover .gallery__cap { opacity: 1; }

/* filter chips */
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: var(--s-xl); }
.chip {
  font-family: var(--font-mono); font-size: 0.625rem; text-transform: uppercase; letter-spacing: 0.1em;
  padding: 0.4rem 0.85rem; border-radius: var(--pill); cursor: pointer;
  background: var(--ov-1); border: 1px solid var(--ov-2); color: var(--text-2);
  transition: all var(--transition);
}
.chip:hover { border-color: var(--ov-3); color: var(--text); }
.chip.active { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }

/* lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(0,0,0,0.96);
  display: none; align-items: center; justify-content: center; padding: var(--s-xl);
}
.lightbox.open { display: flex; }
.lightbox__img { max-width: 88vw; max-height: 76vh; object-fit: contain; }
.lightbox__meta {
  position: absolute; bottom: var(--s-xl); left: 50%; transform: translateX(-50%);
  display: flex; flex-wrap: wrap; gap: var(--s-lg); justify-content: center;
  font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.06em;
  color: var(--text-2); text-transform: uppercase; max-width: 90vw;
}
.lightbox__meta .k { color: var(--text-3); margin-right: 0.4rem; }
.lightbox__close, .lightbox__nav {
  position: absolute; background: none; border: 0; color: var(--text); cursor: pointer;
  font-family: var(--font-mono); font-size: 1.5rem;
}
.lightbox__close { top: var(--s-xl); right: var(--s-xl); }
.lightbox__nav { top: 50%; transform: translateY(-50%); padding: 1rem; font-size: 2rem; color: var(--text-2); }
.lightbox__nav:hover { color: var(--text); }
.lightbox__nav--prev { left: var(--s-sm); }
.lightbox__nav--next { right: var(--s-sm); }

/* ---------- Metadata / EXIF rows ---------- */
.metarow { display: flex; gap: var(--s-lg); flex-wrap: wrap; font-family: var(--font-mono);
  font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-2); }
.metarow .k { color: var(--text-3); }

/* ---------- Cards (prints, writing list, bike) ---------- */
.card { background: var(--surface); border: 1px solid var(--line); padding: var(--s-xl);
  transition: border-color var(--transition), transform var(--transition); }
.card:hover { border-color: var(--ov-3); transform: translateY(-3px); }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-xl); }
@media (max-width: 760px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* print sizes table */
.ptable { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.ptable th, .ptable td { text-align: left; padding: 0.85rem 1rem; border-bottom: 1px solid var(--line); }
.ptable th { font-family: var(--font-mono); font-size: 0.625rem; text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--text-3); font-weight: 400; }
.ptable td.price { font-family: var(--font-mono); color: var(--text); }

/* ---------- Writing (prose) ---------- */
.prose { max-width: 68ch; margin: 0 auto; }
.prose p { margin-bottom: var(--s-lg); color: #d8d8d8; }
.prose h2 { margin: var(--s-xxl) 0 var(--s-md); }
.prose h3 { margin: var(--s-xl) 0 var(--s-sm); }
.prose a { border-bottom: 1px solid var(--text-3); }
.prose a:hover { border-color: var(--text); }
.prose blockquote { border-left: 1px solid var(--line); padding-left: var(--s-lg);
  color: var(--text-2); font-style: italic; margin: var(--s-lg) 0; }

.post-list { list-style: none; }
.post-list li { border-top: 1px solid var(--line); padding: var(--s-lg) 0; }
.post-list .date { font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-3); }
.post-list h3 { margin: var(--s-xs) 0; }
.post-list p { color: var(--text-2); font-size: 0.95rem; }

/* ---------- Forms (contact) ---------- */
.field { margin-bottom: var(--s-lg); }
.field label { display: block; font-family: var(--font-mono); font-size: 0.625rem;
  text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-3); margin-bottom: var(--s-sm); }
.field input, .field textarea {
  width: 100%; background: var(--surface); border: 1px solid var(--line); color: var(--text);
  padding: 0.85rem 1rem; font-family: var(--font-body); font-size: 1rem; border-radius: var(--radius);
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--text); }

/* ---------- Footer ---------- */
.footer { background: var(--gallery-black); border-top: 1px solid var(--line);
  padding: var(--s-xxl) 0; color: var(--text-2); }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--s-xl);
  margin-bottom: var(--s-xl); }
.footer__grid h3 { font-family: var(--font-mono); font-size: 0.625rem; text-transform: uppercase;
  letter-spacing: 0.14em; color: var(--text-3); font-weight: 400; margin-bottom: var(--s-md); }
.footer__grid ul { list-style: none; }
.footer__grid li { margin-bottom: var(--s-sm); }
.footer__grid a { color: var(--text-2); font-size: 0.9rem; }
.footer__grid a:hover { color: var(--text); }
.footer__bottom { border-top: 1px solid var(--line); padding-top: var(--s-lg);
  font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--s-sm); }
@media (max-width: 640px) { .footer__grid { grid-template-columns: 1fr; } }

/* utilities */
.center { text-align: center; }
.mt-lg { margin-top: var(--s-lg); }
.mt-xl { margin-top: var(--s-xl); }
.cross-note { font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3); }

/* ── Seen Live (concerts.html) ─────────────────────────────────────────────
   Two card treatments. `.artist` has a photograph; `.artist--stub` never did.
   The stub is typographic on purpose — a show with no frames is a real entry
   in the log, not a missing image, so it must not read as one. */
.artists {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 4px;
}
.artist {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  padding: 0;
  border: 0;
  background: var(--surface);
  color: inherit;
  cursor: pointer;
  overflow: hidden;
  text-align: left;
  font: inherit;
}
.artist img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: opacity var(--transition), transform 0.6s ease;
}
.artist:hover img { opacity: 0.82; transform: scale(1.03); }
.artist:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.artist--stub {
  background: linear-gradient(150deg, var(--surface-2), var(--void));
  border: 1px solid var(--line);
}
.artist__mark {
  position: absolute; top: var(--s-md); left: var(--s-md);
  font-family: var(--font-mono); font-size: 0.625rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--text-3);
}

.artist__cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  display: flex; flex-direction: column; gap: 0.2rem;
  padding: var(--s-md);
  background: linear-gradient(to top, rgba(0,0,0,0.88), transparent);
}
.artist--stub .artist__cap { background: none; }
.artist__cap strong {
  font-family: var(--font-display); font-weight: 500;
  font-size: 0.95rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text); line-height: 1.25;
}
.artist__cap em {
  font-family: var(--font-mono); font-style: normal;
  font-size: 0.7rem; color: var(--text-2);
}

/* One show inside an artist's detail view. */
.show {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: var(--s-md) 0;
  border-bottom: 1px solid var(--line);
  margin-top: var(--s-lg);
}
.show strong {
  font-family: var(--font-display); font-weight: 500; font-size: 1.05rem;
  margin-right: var(--s-md);
}
.show span { color: var(--text-2); font-size: 0.9rem; }
.show__unknown { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-3); }
.show + .gallery { margin-top: var(--s-md); }

@media (max-width: 560px) {
  .artists { grid-template-columns: repeat(2, 1fr); }
}