/* =========================================================================
   CONCOURS — Museum & Collector
   JC Goodworks customer-site template concept (concours@0.1.0-concept)

   Cool, object-focused, and deliberately quiet — the opposite of Heritage's
   warm narrative. Typography is inverted against that template too: wide
   letterspaced sans for labels and headings, serif for reading text.
   The only interaction is a spotlight vignette that follows the pointer.
   ========================================================================= */

:root {
  /* --- BrandProfile tokens --- */
  --brand-primary:    #6e1a26;   /* oxblood — the single accent */
  --brand-secondary:  #8e8d89;
  --brand-accent:     #15171a;   /* graphite */
  --brand-background: #f2f1ee;
  --brand-surface:    #ffffff;
  --brand-text:       #15171a;
  --brand-heading-font: "Helvetica Neue", Helvetica, Arial, ui-sans-serif, system-ui, sans-serif;
  --brand-body-font:  Georgia, "Iowan Old Style", "Times New Roman", serif;

  --c-bg:      var(--brand-background);
  --c-surface: var(--brand-surface);
  --c-text:    var(--brand-text);
  --c-muted:   color-mix(in srgb, var(--brand-text) 62%, var(--brand-background));
  --c-line:    color-mix(in srgb, var(--brand-text) 16%, var(--brand-background));
  --c-line-strong: color-mix(in srgb, var(--brand-text) 36%, var(--brand-background));
  --c-on-primary: #f7f5f2;
  --c-ink:     var(--brand-accent);

  --t-fast: 200ms; --t-med: 420ms; --t-slow: 1000ms;
  --ease: cubic-bezier(.22,.6,.2,1);

  --shell: 1120px;
  --gutter: clamp(1.2rem, 5vw, 5rem);
  --step-0: clamp(1.02rem, .98rem + .2vw, 1.12rem);
  --step-1: clamp(1.15rem, 1.05rem + .5vw, 1.35rem);
  --step-2: clamp(1.5rem, 1.2rem + 1.2vw, 2.2rem);
  --step-3: clamp(2rem, 1.4rem + 2.4vw, 3.2rem);
  --step-4: clamp(2.4rem, 1.5rem + 4vw, 4.8rem);
}

html[data-theme="alt-a"] {
  --brand-primary:    #1f2c3a;
  --brand-secondary:  #8a8378;
  --brand-accent:     #7a6534;
  --brand-background: #f5f3ee;
  --brand-surface:    #ffffff;
  --brand-text:       #16181b;
  --c-on-primary:     #f6f4ef;
}
html[data-theme="alt-b"] {
  --brand-primary:    #c9a227;
  --brand-secondary:  #6c6c6a;
  --brand-accent:     #e9e7e2;
  --brand-background: #17181a;
  --brand-surface:    #1f2124;
  --brand-text:       #eceae5;
  --c-on-primary:     #17181a;
}

@media (prefers-reduced-motion: reduce) { :root { --t-fast: 0ms; --t-med: 0ms; --t-slow: 0ms; } }
html[data-motion="reduce"]              { --t-fast: 0ms; --t-med: 0ms; --t-slow: 0ms; }

/* ---------------------------------------------------------------- base -- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
html[data-motion="reduce"] { scroll-behavior: auto; }

body { margin: 0; background: var(--c-bg); color: var(--c-text); font-family: var(--brand-body-font); font-size: var(--step-0); line-height: 1.78; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
h1, h2, h3 { font-family: var(--brand-heading-font); font-weight: 400; line-height: 1.1; letter-spacing: -.01em; margin: 0; }
p { margin: 0 0 1.2rem; }
img, svg { display: block; max-width: 100%; }
a { color: var(--brand-primary); text-underline-offset: .22em; }
:focus-visible { outline: 2px solid var(--brand-primary); outline-offset: 4px; }
html[data-theme="alt-b"] :focus-visible { outline-color: var(--brand-primary); }

.shell { width: min(100% - (var(--gutter) * 2), var(--shell)); margin-inline: auto; }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: 1rem; top: -100px; z-index: 200; background: var(--brand-primary); color: var(--c-on-primary); padding: .8rem 1.2rem; font-family: var(--brand-heading-font); text-decoration: none; transition: top var(--t-fast) var(--ease); }
.skip-link:focus { top: 1rem; }

.rule-label {
  font-family: var(--brand-heading-font); font-size: .66rem; letter-spacing: .42em;
  text-transform: uppercase; color: var(--c-muted); margin: 0 0 1.4rem;
}
.rule-label--light { color: color-mix(in srgb, var(--c-on-primary) 74%, var(--brand-primary)); }
.dim { color: var(--c-muted); }

/* --------------------------------------------------------------- buttons -- */
.btn {
  --btn-bg: transparent; --btn-fg: var(--c-text); --btn-bd: var(--c-line-strong);
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  min-height: 52px; padding: .9rem 2rem; background: var(--btn-bg); color: var(--btn-fg);
  border: 1px solid var(--btn-bd); border-radius: 0;
  font-family: var(--brand-heading-font); font-size: .74rem; letter-spacing: .24em;
  text-transform: uppercase; text-decoration: none; cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.btn--solid { --btn-bg: var(--c-ink); --btn-fg: var(--c-bg); --btn-bd: var(--c-ink); }
.btn--solid:hover { --btn-bg: var(--brand-primary); --btn-bd: var(--brand-primary); color: var(--c-on-primary); }
.btn--line:hover { --btn-bd: var(--c-ink); }
.enquire .btn--line { --btn-fg: var(--c-on-primary); --btn-bd: color-mix(in srgb, var(--c-on-primary) 46%, transparent); }
.enquire .btn--line:hover { --btn-bd: var(--c-on-primary); }
.enquire .btn--solid { --btn-bg: var(--c-on-primary); --btn-fg: var(--brand-primary); --btn-bd: var(--c-on-primary); }
.enquire .btn--solid:hover { --btn-bg: transparent; color: var(--c-on-primary); --btn-bd: var(--c-on-primary); }

/* ---------------------------------------------------------------- header -- */
.site-header { position: sticky; top: 0; z-index: 90; background: color-mix(in srgb, var(--c-bg) 94%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid var(--c-line); }
.site-header__inner { display: flex; align-items: center; gap: 2rem; min-height: 82px; }
.brandmark { display: flex; align-items: center; gap: .8rem; text-decoration: none; color: var(--c-text); margin-right: auto; }
.brandmark__name { font-family: var(--brand-heading-font); font-size: 1.1rem; letter-spacing: .34em; text-transform: uppercase; }
.brandmark__rule { width: 26px; height: 1px; background: var(--c-line-strong); }
.brandmark__sub { font-family: var(--brand-heading-font); font-size: .62rem; letter-spacing: .34em; text-transform: uppercase; color: var(--c-muted); }

.primary-nav ul { display: flex; gap: 2rem; list-style: none; margin: 0; padding: 0; }
.primary-nav a { font-family: var(--brand-heading-font); color: var(--c-text); text-decoration: none; font-size: .68rem; letter-spacing: .22em; text-transform: uppercase; padding: .6rem 0; display: inline-block; border-bottom: 1px solid transparent; }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { border-bottom-color: var(--brand-primary); }
.nav-toggle { display: none; align-items: center; gap: .6rem; min-height: 46px; padding: .5rem .9rem; background: none; border: 1px solid var(--c-line-strong); color: var(--c-text); font-family: var(--brand-heading-font); font-size: .64rem; letter-spacing: .22em; text-transform: uppercase; cursor: pointer; }
.nav-toggle__bars { display: grid; gap: 5px; }
.nav-toggle__bars i { display: block; width: 18px; height: 1px; background: currentColor; }
html:not(.js) .nav-toggle { display: none !important; }
@media (max-width: 940px) {
  html.js .nav-toggle { display: inline-flex; }
  html.js .primary-nav { position: fixed; inset: 82px 0 auto; z-index: 80; background: var(--c-surface); border-bottom: 1px solid var(--c-line-strong); padding: .4rem var(--gutter) 1.6rem; transform: translateY(-120%); visibility: hidden; transition: transform var(--t-med) var(--ease), visibility var(--t-med); }
  html.js .primary-nav[data-open="true"] { transform: none; visibility: visible; }
  html.js .primary-nav ul { flex-direction: column; gap: 0; }
  html.js .primary-nav li + li { border-top: 1px solid var(--c-line); }
  html.js .primary-nav a { display: block; padding: 1rem 0; font-size: .8rem; border-bottom: 0; }
  html:not(.js) .primary-nav { overflow-x: auto; }
  html:not(.js) .site-header__inner { flex-wrap: wrap; gap: 1rem; }
}

/* ------------------------------------------------------------------ hero -- */
.hero { position: relative; overflow: hidden; background: var(--c-surface); }
.hero__figure { margin: 0; }
.hero__plate { width: 100%; height: auto; max-height: 76vh; object-fit: cover; }
/* The spotlight: a vignette centred on --mx / --my. No transform, no loop. */
.hero__spot {
  position: absolute; inset: 0; pointer-events: none;
  --mx: 50%; --my: 48%;
  background: radial-gradient(circle 34vmax at var(--mx) var(--my),
    transparent 0%,
    color-mix(in srgb, var(--c-text) 6%, transparent) 42%,
    color-mix(in srgb, var(--c-text) 34%, transparent) 78%,
    color-mix(in srgb, var(--c-text) 52%, transparent) 100%);
  transition: background var(--t-med) linear;
}
html:not(.js) .hero__spot, html[data-motion="reduce"] .hero__spot { --mx: 50%; --my: 48%; transition: none; }

.hero__fade {
  position: absolute; left: 0; right: 0; bottom: 0; height: 50%; pointer-events: none;
  background: linear-gradient(to top,
    var(--c-bg) 34%,
    color-mix(in srgb, var(--c-bg) 84%, transparent) 58%,
    transparent 100%);
}
@media (max-width: 720px) { .hero__fade { height: 34%; } }
.hero__caption { position: relative; z-index: 2; margin-top: -9.5rem; padding-bottom: clamp(2.5rem, 6vw, 4.5rem); }
@media (max-width: 720px) { .hero__caption { margin-top: -3rem; } }
.lot { font-family: var(--brand-heading-font); font-size: .66rem; letter-spacing: .34em; text-transform: uppercase; color: var(--c-muted); margin: 0 0 1.2rem; }
.hero__title { font-size: var(--step-4); letter-spacing: -.028em; margin: 0 0 1.2rem; }
.hero__sub { font-size: var(--step-1); color: var(--c-muted); margin: 0; }
.hero__hint { position: absolute; right: var(--gutter); top: 1.4rem; z-index: 2; margin: 0; font-family: var(--brand-heading-font); font-size: .6rem; letter-spacing: .24em; text-transform: uppercase; color: color-mix(in srgb, var(--c-text) 55%, transparent); }
html:not(.js) .hero__hint, html[data-motion="reduce"] .hero__hint { display: none; }

/* -------------------------------------------------------------- sections -- */
.plate, .essay, .provenance, .partners, .enquire { padding: clamp(4rem, 10vw, 8rem) 0; }
.section-head { margin-bottom: clamp(2.5rem, 6vw, 4rem); max-width: 40ch; }
.section-head--centred { margin-inline: auto; text-align: center; }
.section-head h2 { font-size: var(--step-2); letter-spacing: -.02em; }

/* ----------------------------------------------------------------- plate -- */
.plate { border-top: 1px solid var(--c-line); }
.plate__inner { max-width: 820px; margin-inline: auto; }
.plate__head { text-align: center; margin-bottom: clamp(2.5rem, 6vw, 4rem); }
.plate__head h2 { font-size: var(--step-3); margin-bottom: 1.4rem; }
.plate__standfirst { color: var(--c-muted); max-width: 52ch; margin-inline: auto; }
.plate__list { margin: 0; border-top: 1px solid var(--c-text); }
.plate__list > div { display: grid; grid-template-columns: 13rem minmax(0, 1fr); gap: 2rem; border-bottom: 1px solid var(--c-line); padding: 1rem 0; }
@media (max-width: 620px) { .plate__list > div { grid-template-columns: 1fr; gap: .1rem; padding: .9rem 0; } }
.plate__list dt { font-family: var(--brand-heading-font); font-size: .64rem; letter-spacing: .24em; text-transform: uppercase; color: var(--c-muted); padding-top: .45rem; }
.plate__list dd { margin: 0; font-size: 1.08rem; }
.plate__note { color: var(--c-muted); font-size: .84rem; }
.plate__foot { margin: 2rem 0 0; font-size: .84rem; color: var(--c-muted); text-align: center; }

/* ----------------------------------------------------------------- essay -- */
.essay { background: var(--c-surface); border-block: 1px solid var(--c-line); }
.essay__list { list-style: none; margin: 0; padding: 0; display: grid; gap: clamp(3rem, 7vw, 6rem); }
.essay__item { width: min(100% - (var(--gutter) * 2), 1240px); margin-inline: auto; }
.essay__item figure { margin: 0; }
.essay__item svg { width: 100%; height: auto; }
.essay__item figcaption { margin-top: 1rem; font-family: var(--brand-heading-font); font-size: .66rem; letter-spacing: .2em; text-transform: uppercase; color: var(--c-muted); }
.essay__num { color: var(--brand-primary); margin-right: .7rem; }
.essay__item--pair { display: grid; grid-template-columns: repeat(2, 1fr); gap: clamp(1rem, 3vw, 2.5rem); }
@media (max-width: 680px) { .essay__item--pair { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------ provenance -- */
.provenance__inner { max-width: 780px; margin-inline: auto; }
.prov-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--c-text); }
.prov-list li { display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: 2rem; border-bottom: 1px solid var(--c-line); padding: 1.1rem 0; }
@media (max-width: 560px) { .prov-list li { grid-template-columns: 1fr; gap: .2rem; } }
.prov-list__year { font-family: var(--brand-heading-font); font-size: .82rem; letter-spacing: .2em; color: var(--brand-primary); padding-top: .35rem; }
.prov-list__what { color: var(--c-muted); }
.provenance__note { margin: 1.6rem 0 0; font-size: .84rem; color: var(--c-muted); }

/* -------------------------------------------------------------- partners -- */
.partners { background: var(--c-bg); border-top: 1px solid var(--c-line); }
.partner-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1px; background: var(--c-line); border: 1px solid var(--c-line); list-style: none; margin: 0; padding: 0; max-width: 940px; margin-inline: auto; }
.partner-grid li[data-tier="title"] { grid-column: 1 / -1; }
.sponsor { display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; height: 100%; padding: var(--safe, 1.6rem 1.4rem); background: var(--c-bg); color: var(--c-text); text-decoration: none; transition: background var(--t-fast) var(--ease); }
.sponsor:hover { background: var(--c-surface); color: var(--brand-primary); }
.sponsor__mark { font-family: var(--brand-heading-font); letter-spacing: .1em; line-height: 1.2; overflow-wrap: anywhere; }
.sponsor__tier { display: block; font-family: var(--brand-heading-font); font-size: .56rem; letter-spacing: .28em; text-transform: uppercase; color: var(--c-muted); margin-top: .7rem; }
.sponsor[data-tier="title"]     { --safe: 2.6rem 2rem; }
.sponsor[data-tier="title"] .sponsor__mark     { font-size: clamp(1.3rem, 2.6vw, 1.9rem); }
.sponsor[data-tier="premier"]   { --safe: 1.9rem 1.4rem; }
.sponsor[data-tier="premier"] .sponsor__mark   { font-size: clamp(1rem, 1.8vw, 1.25rem); }
.sponsor[data-tier="associate"] { --safe: 1.5rem 1.2rem; }
.sponsor[data-tier="associate"] .sponsor__mark { font-size: clamp(.9rem, 1.3vw, 1.02rem); }

/* --------------------------------------------------------------- enquire -- */
.enquire { background: var(--brand-primary); color: var(--c-on-primary); }
.enquire__inner { max-width: 760px; margin-inline: auto; text-align: center; }
.enquire h2 { font-size: var(--step-3); margin-bottom: 1.2rem; letter-spacing: -.02em; }
.enquire p { color: color-mix(in srgb, var(--c-on-primary) 84%, var(--brand-primary)); max-width: 48ch; margin-inline: auto; }
.enquire__actions { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; margin: 2.2rem 0 3rem; }
.enquire :focus-visible { outline-color: var(--c-on-primary); }
.enquire .dim { color: color-mix(in srgb, var(--c-on-primary) 64%, var(--brand-primary)); }
.enquire__contact { margin: 0; text-align: left; border-top: 1px solid color-mix(in srgb, var(--c-on-primary) 28%, transparent); }
.enquire__contact > div { display: grid; grid-template-columns: 9rem 1fr; gap: 1.5rem; border-bottom: 1px solid color-mix(in srgb, var(--c-on-primary) 18%, transparent); padding: 1rem 0; }
@media (max-width: 560px) { .enquire__contact > div { grid-template-columns: 1fr; gap: .2rem; } }
.enquire__contact dt { font-family: var(--brand-heading-font); font-size: .62rem; letter-spacing: .24em; text-transform: uppercase; color: color-mix(in srgb, var(--c-on-primary) 70%, var(--brand-primary)); padding-top: .4rem; }
.enquire__contact dd { margin: 0; }
.enquire__contact a { color: var(--c-on-primary); }

/* ----------------------------------------------------------- empty state -- */
.empty-state { max-width: 48ch; margin-inline: auto; text-align: center; border-top: 1px solid var(--c-text); padding-top: 2rem; }
.empty-state h3 { font-size: var(--step-2); margin-bottom: 1rem; }
.empty-state p { color: var(--c-muted); }

/* ---------------------------------------------------------------- footer -- */
.site-footer { background: var(--c-bg); border-top: 1px solid var(--c-line); padding: clamp(3rem, 6vw, 4.5rem) 0 2rem; }
.site-footer__inner { display: flex; flex-wrap: wrap; gap: 2rem; justify-content: space-between; align-items: start; }
.site-footer__brand { font-size: .86rem; color: var(--c-muted); margin: 0; max-width: 34ch; }
.site-footer__brand b { color: var(--c-text); font-family: var(--brand-heading-font); font-weight: 400; letter-spacing: .16em; text-transform: uppercase; font-size: .78rem; }
.site-footer__nav ul { display: grid; gap: .6rem; list-style: none; margin: 0; padding: 0; }
.site-footer__nav a { font-family: var(--brand-heading-font); color: var(--c-muted); text-decoration: none; font-size: .66rem; letter-spacing: .22em; text-transform: uppercase; }
.site-footer__nav a:hover { color: var(--brand-primary); }
.site-footer__legal { margin-top: 3rem; border-top: 1px solid var(--c-line); padding-top: 1.4rem; }
.site-footer__legal p { font-size: .78rem; color: var(--c-muted); margin: 0; }

/* -------------------------------------------------------------- reveals -- */
/* Deliberately the slowest, smallest reveal of the ten: a fade only. */
html.js[data-motion="full"] [data-reveal] { opacity: 0; }
html.js[data-motion="full"] [data-reveal].is-in { opacity: 1; transition: opacity var(--t-slow) var(--ease); }

/* ------------------------------------------------- concept control panel -- */
.concept-controls { position: fixed; right: 1rem; bottom: 1rem; z-index: 150; font-family: var(--brand-heading-font); }
.concept-controls__toggle { display: inline-flex; align-items: center; gap: .5rem; min-height: 44px; padding: .6rem 1rem; background: var(--c-ink); color: var(--c-bg); border: 1px solid var(--c-ink); border-radius: 0; font: inherit; font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; cursor: pointer; }
.concept-controls__panel { position: absolute; right: 0; bottom: calc(100% + .6rem); width: min(84vw, 286px); background: var(--c-surface); border: 1px solid var(--c-line-strong); padding: 1rem; display: grid; gap: .9rem; box-shadow: 0 16px 40px rgb(21 23 26 / .16); max-height: 70vh; overflow: auto; }
.concept-controls__title { font-size: .6rem; letter-spacing: .18em; text-transform: uppercase; color: var(--c-muted); margin: 0; }
.concept-controls fieldset { border: 0; border-top: 1px solid var(--c-line); margin: 0; padding: .7rem 0 0; display: grid; gap: .45rem; }
.concept-controls legend { font-size: .6rem; letter-spacing: .22em; text-transform: uppercase; color: var(--c-muted); padding: 0; }
.concept-controls label { display: flex; align-items: center; gap: .55rem; font-size: .78rem; letter-spacing: .02em; text-transform: none; cursor: pointer; min-height: 28px; }
.concept-controls input { accent-color: var(--brand-primary); width: 18px; height: 18px; }
.concept-controls__hint { font-size: .68rem; color: var(--c-muted); line-height: 1.5; letter-spacing: 0; text-transform: none; }
@media print { .concept-controls { display: none; } }

/* --- narrow-screen safety ----------------------------------------------
   Long email addresses and fixed label columns are the one thing that can
   push a 375px viewport sideways. Stack the pair and let addresses wrap. */
@media (max-width: 560px) {
  .contact__list > div, .enquire__contact > div { grid-template-columns: 1fr; gap: .2rem; }
}
.contact__list dd, .enquire__contact dd, .contact__list a, .enquire__contact a,
.find__address, .visit__address { overflow-wrap: anywhere; }

/* --- small-screen header ------------------------------------------------
   The wordmark's wide tracking plus the menu button will not co-exist at
   375px, so the tracking tightens and the secondary word steps out. */
@media (max-width: 600px) {
  .site-header__inner { gap: .8rem; min-height: 68px; }
  .brandmark { gap: .5rem; min-width: 0; }
  .brandmark__name { font-size: .92rem; letter-spacing: .2em; }
  .brandmark__rule, .brandmark__sub { display: none; }
  .nav-toggle { letter-spacing: .12em; padding: .5rem .7rem; flex: none; }
  html.js .primary-nav { inset-block-start: 68px; }
}