/* ==========================================================================
   LEID GALLERY — Shared components
   Header, menu, contact list, buttons, reveal motion.
   ========================================================================== */

/* ---- Page tones -----------------------------------------------------------
   Sections declare data-tone; tone.js copies the active one to <html>.
   Without JS each section paints its own background (see .section). */
html[data-tone="light"]     { --tone-bg: var(--c-ivory);         --tone-fg: var(--c-ink); }
html[data-tone="cream"]     { --tone-bg: var(--c-cream);         --tone-fg: var(--c-ink); }
html[data-tone="dark"]      { --tone-bg: var(--c-charcoal);      --tone-fg: var(--c-ivory); }
html[data-tone="dark-soft"] { --tone-bg: var(--c-charcoal-soft); --tone-fg: var(--c-ivory); }

.section {
  position: relative;
  background-color: var(--section-bg);
  color: var(--section-fg);
}

.js .section {
  background-color: transparent;
}

.section[data-tone="light"]     { --section-bg: var(--c-ivory);         --section-fg: var(--c-ink); }
.section[data-tone="cream"]     { --section-bg: var(--c-cream);         --section-fg: var(--c-ink); }
.section[data-tone="dark"]      { --section-bg: var(--c-charcoal);      --section-fg: var(--c-ivory); }
.section[data-tone="dark-soft"] { --section-bg: var(--c-charcoal-soft); --section-fg: var(--c-ivory); }

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-header);
  --h-bg: var(--c-ivory);
  --h-fg: var(--c-ink);
  padding-block-start: env(safe-area-inset-top);
  color: var(--h-fg);
  transition:
    transform var(--d-base) var(--ease-out),
    background-color var(--d-tone) var(--ease-in-out),
    color var(--d-tone) var(--ease-in-out);
}

.site-header::after {
  /* hairline that appears once the header detaches from the hero */
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0;
  block-size: var(--hairline);
  background: currentColor;
  opacity: 0;
  transition: opacity var(--d-base) var(--ease-out);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  block-size: var(--header-h);
  padding-inline: max(var(--gutter), env(safe-area-inset-right)) max(var(--gutter), env(safe-area-inset-left));
  max-inline-size: var(--page-max);
  margin-inline: auto;
}

.site-header.is-solid {
  background-color: var(--h-bg);
  background-color: color-mix(in srgb, var(--h-bg) 86%, transparent);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  backdrop-filter: blur(14px) saturate(1.1);
}

.site-header.is-solid::after {
  opacity: 0.12;
}

.site-header.is-hidden {
  transform: translateY(-100%);
}

/* Wide screens: the model fills the left of the hero, so the menu moves to
   the right (inline-start) and the brand takes the centre. */
@media (min-width: 48em) {
  .site-header__inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
  }

  .site-header .menu-toggle {
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
  }

  .site-header .brand {
    grid-column: 2;
    grid-row: 1;
  }
}

/* Brand: monogram (black or gold PNG, never recoloured) + Latin wordmark */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  min-block-size: 44px;
}

.brand__mark {
  position: relative;
  inline-size: 2.625rem;              /* 42px; 46px on wide screens */
  aspect-ratio: 1223 / 1286;
  flex: none;
}

.brand__mark img {
  position: absolute;
  inset: 0;
  inline-size: 100%;
  block-size: 100%;
  object-fit: contain;
  transition: opacity var(--d-tone) var(--ease-in-out);
}

.brand__mark-gold { opacity: 0; }

/* More presence for the mark: the black PNG renders as soft grey at this size,
   so deepen its tonal contrast slightly (display only; the file is untouched). */
.brand__mark-black {
  filter: contrast(1.35) brightness(0.82);
}

@media (min-width: 48em) {
  .brand__mark {
    inline-size: 2.875rem;
  }
}

/* The header follows the section beneath it (tone.js sets data-tone on it). */
.site-header[data-tone="cream"]     { --h-bg: var(--c-cream); }
.site-header[data-tone="dark"]      { --h-bg: var(--c-charcoal);      --h-fg: var(--c-ivory); }
.site-header[data-tone="dark-soft"] { --h-bg: var(--c-charcoal-soft); --h-fg: var(--c-ivory); }

.site-header[data-tone^="dark"] .brand__mark-gold  { opacity: 1; }
.site-header[data-tone^="dark"] .brand__mark-black { opacity: 0; }

.brand__word {
  font-size: 0.8125rem;
  letter-spacing: 0.34em;
  line-height: 1;
  white-space: nowrap;
  font-variation-settings: "opsz" 11;
  /* margin compensates the trailing tracking so the word looks centred */
  margin-inline-end: -0.34em;
  transition: opacity var(--d-base) var(--ease-out), transform var(--d-base) var(--ease-out);
}

/* On top of the hero the giant LEID GALLERY already speaks; keep the wordmark quiet. */
.site-header.is-top .brand__word {
  opacity: 0;
  transform: translateX(0.5rem);
}

/* Menu toggle */
.menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  min-block-size: 44px;
  min-inline-size: 44px;
  padding-inline: var(--s-1);
  font-size: var(--t-small);
  font-weight: var(--w-light);
}

.menu-toggle__lines {
  position: relative;
  inline-size: 1.75rem;
  block-size: 0.5rem;
}

.menu-toggle__lines::before,
.menu-toggle__lines::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  block-size: var(--hairline);
  background: currentColor;
  transition: transform var(--d-base) var(--ease-out), inline-size var(--d-base) var(--ease-out);
}

.menu-toggle__lines::before { inset-block-start: 0; }
.menu-toggle__lines::after  { inset-block-end: 0; inline-size: 65%; inset-inline-end: auto; }

.menu-toggle:hover .menu-toggle__lines::after { inline-size: 100%; }

/* ==========================================================================
   Full-screen menu (cream)
   ========================================================================== */
.site-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  background-color: var(--c-cream);
  color: var(--c-ink);
  padding:
    calc(env(safe-area-inset-top)) max(var(--gutter), env(safe-area-inset-right))
    max(var(--s-5), env(safe-area-inset-bottom)) max(var(--gutter), env(safe-area-inset-left));
  overflow-y: auto;
  overscroll-behavior: contain;
  visibility: hidden;
  opacity: 0;
  clip-path: inset(0 0 100% 0);
  transition:
    clip-path var(--d-slow) var(--ease-in-out),
    opacity var(--d-base) var(--ease-out),
    visibility 0s linear var(--d-slow);
}

.site-menu.is-open {
  visibility: visible;
  opacity: 1;
  clip-path: inset(0 0 0 0);
  transition:
    clip-path var(--d-slow) var(--ease-in-out),
    opacity var(--d-fast) var(--ease-out),
    visibility 0s;
}

.site-menu__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  block-size: var(--header-h);
  flex: none;
  max-inline-size: var(--page-max);
  inline-size: 100%;
  margin-inline: auto;
}

.site-menu__close {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  min-block-size: 44px;
  min-inline-size: 44px;
  font-size: var(--t-small);
  font-weight: var(--w-light);
}

.site-menu__close-icon {
  position: relative;
  inline-size: 1.25rem;
  block-size: 1.25rem;
}

.site-menu__close-icon::before,
.site-menu__close-icon::after {
  content: "";
  position: absolute;
  inset-block-start: 50%;
  inset-inline: 0;
  block-size: var(--hairline);
  background: currentColor;
  transform: rotate(45deg);
}

.site-menu__close-icon::after { transform: rotate(-45deg); }

.site-menu__body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-inline-size: var(--page-max);
  inline-size: 100%;
  margin-inline: auto;
  padding-block: var(--s-7);
}

.site-menu__list {
  border-block-start: var(--hairline) solid var(--c-rule-light);
}

.site-menu__item {
  border-block-end: var(--hairline) solid var(--c-rule-light);
}

.site-menu__link {
  position: relative;
  display: grid;
  grid-template-columns: 3.25rem 1fr auto;
  align-items: baseline;
  gap: var(--s-4);
  padding-block: clamp(1rem, 2.6svh, 1.6rem);
  font-size: clamp(1.25rem, 1.1rem + 1vw, 1.875rem);
  font-weight: var(--w-light);
  line-height: 1.3;
}

.site-menu__num {
  font-family: var(--f-display);
  font-size: 1.125rem;
  color: var(--c-brown);
  direction: ltr;
  text-align: start;
  font-variation-settings: "opsz" 24;
}

.site-menu__latin {
  font-size: var(--t-latin-label);
  color: var(--c-ink-muted);
  align-self: center;
}

.site-menu__link::after {
  content: "";
  position: absolute;
  inset-block-end: -1px;
  inset-inline-start: 0;
  inline-size: 0;
  block-size: var(--hairline);
  background: var(--c-ink);
  transition: inline-size var(--d-slow) var(--ease-out);
}

.site-menu__link:hover::after,
.site-menu__link:focus-visible::after {
  inline-size: 100%;
}

.site-menu__link:focus-visible {
  outline-offset: -2px;
}

/* staggered entrance */
.site-menu__item,
.site-menu__foot {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity var(--d-base) var(--ease-out), transform var(--d-slow) var(--ease-out);
}

.site-menu.is-open .site-menu__item,
.site-menu.is-open .site-menu__foot {
  opacity: 1;
  transform: none;
}

.site-menu.is-open .site-menu__item:nth-child(1) { transition-delay: 220ms; }
.site-menu.is-open .site-menu__item:nth-child(2) { transition-delay: 290ms; }
.site-menu.is-open .site-menu__item:nth-child(3) { transition-delay: 360ms; }
.site-menu.is-open .site-menu__item:nth-child(4) { transition-delay: 430ms; }
.site-menu.is-open .site-menu__foot              { transition-delay: 520ms; }

.site-menu__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--s-5);
  max-inline-size: var(--page-max);
  inline-size: 100%;
  margin-inline: auto;
}

.site-menu__mark {
  inline-size: 3.25rem;
  opacity: 0.9;
}

.menu-open {
  overflow: hidden;
}

/* ==========================================================================
   Contact links (menu, discover, footer share one structure)
   ========================================================================== */
.contact-inline {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-5);
  font-size: var(--t-small);
  font-weight: var(--w-light);
}

.contact-inline a {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  min-block-size: 44px;
  background: linear-gradient(currentColor, currentColor) no-repeat 100% 100% / 0 var(--hairline);
  transition: background-size var(--d-base) var(--ease-out);
}

.contact-inline a:hover,
.contact-inline a:focus-visible {
  background-size: 100% var(--hairline);
}

/* Large editorial contact index (discover section) */
.contact-index {
  border-block-start: var(--hairline) solid var(--c-rule-dark);
}

.contact-index__item {
  border-block-end: var(--hairline) solid var(--c-rule-dark);
}

.contact-index__link {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto auto;   /* icon · label · latin · arrow */
  align-items: center;
  gap: var(--s-4);
  min-block-size: 4rem;
  padding-block: var(--s-4);
  font-size: var(--t-lead);
  font-weight: var(--w-light);
  isolation: isolate;
}

.contact-index__link::before {
  /* soft fill that rises on hover/touch */
  content: "";
  position: absolute;
  inset: 0 calc(var(--s-4) * -1);
  z-index: -1;
  background: rgb(243 237 227 / 0.05);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--d-base) var(--ease-out);
}

.contact-index__link:hover::before,
.contact-index__link:focus-visible::before,
.contact-index__link:active::before {
  transform: scaleY(1);
}

/* One line-icon family: 24px grid, 1.25 stroke, currentColor */
.contact-index__icon {
  inline-size: 1.25rem;
  block-size: 1.25rem;
  flex: none;
  opacity: 0.9;
}

.contact-index__latin {
  color: var(--c-paper-muted);
}

.contact-index__value {
  display: block;
  font-size: var(--t-small);
  color: var(--c-paper-muted);
  margin-block-start: var(--s-1);
}

.contact-index__value:empty {
  display: none;
}

.arrow {
  inline-size: 1.5rem;
  block-size: 1.5rem;
  flex: none;
  transition: transform var(--d-base) var(--ease-out);
}

.contact-index__link:hover .arrow,
.contact-index__link:focus-visible .arrow {
  transform: translateX(-0.375rem);
}

/* Persian-digit phone value, kept LTR */
.phone-number {
  direction: ltr;
  unicode-bidi: isolate;
  letter-spacing: 0.04em;
}

/* ==========================================================================
   Text link with growing rule (collections, etc.)
   ========================================================================== */
.text-link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  min-block-size: 44px;
  font-size: var(--t-small);
  font-weight: var(--w-light);
}

.text-link__rule {
  inline-size: 2rem;
  block-size: var(--hairline);
  background: currentColor;
  transition: inline-size var(--d-base) var(--ease-out);
}

.text-link:hover .text-link__rule,
.text-link:focus-visible .text-link__rule,
.is-touched .text-link__rule {
  inline-size: 3.5rem;
}

/* ==========================================================================
   Reveal motion (reveal.js adds .is-visible)
   ========================================================================== */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(1.5rem);
  transition:
    opacity var(--d-reveal) var(--ease-out),
    transform var(--d-reveal) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

.js [data-reveal="image"] {
  opacity: 1;
  transform: none;
  clip-path: inset(100% 0 0 0);
  transition: clip-path 1400ms var(--ease-in-out);
  transition-delay: var(--reveal-delay, 0ms);
}

.js [data-reveal="image"] img {
  transform: scale(1.08);
  transition: transform 1800ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

.js [data-reveal="rule"] {
  opacity: 1;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 1400ms var(--ease-in-out);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  clip-path: inset(0 0 0 0);
}

.js [data-reveal="image"].is-visible img {
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js [data-reveal],
  .js [data-reveal="image"],
  .js [data-reveal="rule"] {
    transform: none;
    clip-path: none;
    opacity: 0;
    transition: opacity 200ms linear;
    transition-delay: 0ms;
  }

  .js [data-reveal="image"] img {
    transform: none;
    transition: none;
  }

  .js [data-reveal].is-visible {
    opacity: 1;
  }

  .site-menu,
  .site-menu.is-open {
    clip-path: none;
    transition: opacity 200ms linear, visibility 0s linear 200ms;
  }

  .site-menu.is-open {
    transition: opacity 200ms linear, visibility 0s;
  }

  .site-menu__item,
  .site-menu__foot {
    transform: none;
    transition: opacity 200ms linear;
    transition-delay: 0ms !important;
  }
}