/* Golden Fin — shared design tokens & base (PROTOTYPE ONLY) */
:root {
  /* Color */
  --charcoal-950: #121314;
  --charcoal-900: #1A1B1D;
  --graphite-800: #26282B;
  --graphite-700: #34373B;
  --graphite-500: #6B6E72;
  --stone-300: #B9B5AD;
  --offwhite-50: #F2EFE9;
  --paper-100: #E8E4DC;
  --champagne-400: #C8B48A;
  --brass-600: #9C7E4F;

  --bg: var(--charcoal-900);
  --fg: var(--offwhite-50);
  --fg-muted: var(--stone-300);
  --line: color-mix(in srgb, var(--graphite-700) 70%, transparent);
  --accent: var(--champagne-400);

  /* Type */
  --font-display-en: "Cormorant Garamond", "Times New Roman", serif;
  --font-sans-en: "Manrope", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  --font-sans-ar: "IBM Plex Sans Arabic", "Segoe UI", Tahoma, sans-serif;
  --font-display-ar: "Noto Naskh Arabic", "IBM Plex Sans Arabic", serif;
  --font-sans: var(--font-sans-en);
  --font-display: var(--font-display-en);
  --tracking-caps: .24em;
  --tracking-meta: .12em;

  /* Grid */
  --cols: 12;
  --margin: clamp(20px, 4.4vw, 64px);
  --gutter: 24px;

  /* Motion */
  --ease-fin: cubic-bezier(.7, 0, .2, 1);
  --ease-out: cubic-bezier(.2, .7, .2, 1);
  --t-ui: 240ms;
  --t-reveal: 800ms;
  --t-cine: 1200ms;

  --header-h: 72px;
}
html[lang="ar"] {
  --font-sans: var(--font-sans-ar);
  --font-display: var(--font-display-ar);
  --tracking-caps: 0;
  --tracking-meta: 0;
}
@media (max-width: 1199px) { :root { --cols: 8; } }
@media (max-width: 767px) { :root { --cols: 4; --gutter: 16px; --header-h: 60px; } }

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 400 16px/1.6 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
html[lang="ar"] body { font-size: 17px; line-height: 1.8; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.meta {
  font: 400 12px/1.4 var(--font-mono);
  letter-spacing: var(--tracking-meta);
  text-transform: uppercase;
  color: var(--fg-muted);
}
html[lang="ar"] .meta { font-family: var(--font-sans-ar); font-weight: 500; font-size: 13px; text-transform: none; }
.hairline { display: block; height: 1px; background: var(--accent); }
.arw { display: inline-block; }
html[dir="rtl"] .arw { transform: scaleX(-1); }

/* Visible architectural grid ("mullions") */
.gf-grid {
  position: absolute; inset: 0; pointer-events: none; z-index: 1;
  padding-inline: var(--margin);
  display: grid; grid-template-columns: repeat(var(--cols), 1fr); column-gap: var(--gutter);
}
.gf-grid span { border-inline: 1px solid var(--line); opacity: .45; }

/* Header */
.gf-header {
  position: fixed; inset-block-start: 0; inset-inline: 0; z-index: 50;
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-inline: var(--margin);
  color: var(--offwhite-50);
  mix-blend-mode: normal;
  transition: background var(--t-ui), backdrop-filter var(--t-ui);
}
.gf-header.is-solid { background: color-mix(in srgb, var(--charcoal-950) 82%, transparent); backdrop-filter: blur(10px); }
.gf-brand { display: flex; flex-direction: column; gap: 6px; }
.gf-brand b {
  font: 500 13px/1 var(--font-sans);
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
}
html[lang="ar"] .gf-brand b { font-size: 16px; text-transform: none; }
.gf-brand i { width: 28px; height: 1px; background: var(--accent); }
.gf-brand small { font: 400 10px/1 var(--font-mono); letter-spacing: .14em; color: var(--fg-muted); text-transform: uppercase; }
html[lang="ar"] .gf-brand small { font: 400 12px/1 var(--font-sans-ar); letter-spacing: 0; }
.gf-actions { display: flex; align-items: center; gap: clamp(12px, 2vw, 28px); }
.gf-lang { display: flex; align-items: center; gap: 2px; font: 500 12px/1 var(--font-mono); letter-spacing: .1em; }
.gf-lang button { min-width: 44px; min-height: 44px; padding: 0 6px; color: var(--fg-muted); transition: color var(--t-ui); }
.gf-lang button[aria-pressed="true"] { color: var(--fg); }
.gf-lang button[lang="ar"] { font: 500 15px/1 var(--font-sans-ar); }
.gf-lang .sep { width: 1px; height: 14px; background: var(--graphite-500); }
.gf-menu-btn {
  min-height: 44px; display: flex; align-items: center; gap: 12px;
  font: 500 12px/1 var(--font-sans); letter-spacing: var(--tracking-caps); text-transform: uppercase;
}
html[lang="ar"] .gf-menu-btn { font-size: 15px; text-transform: none; }
.gf-menu-btn .bars { display: grid; gap: 5px; width: 26px; }
.gf-menu-btn .bars i { height: 1px; background: currentColor; transition: transform var(--t-ui) var(--ease-fin), width var(--t-ui); }
.gf-menu-btn .bars i:last-child { width: 60%; justify-self: end; background: var(--accent); }
.gf-menu-btn[aria-expanded="true"] .bars i:first-child { transform: translateY(3px) rotate(12deg); }
.gf-menu-btn[aria-expanded="true"] .bars i:last-child { width: 100%; transform: translateY(-3px) rotate(-12deg); }

/* Menu overlay */
.gf-menu {
  position: fixed; inset: 0; z-index: 40;
  background: var(--charcoal-950);
  display: grid; grid-template-columns: 1fr 1fr;
  padding: calc(var(--header-h) + 4vh) var(--margin) 6vh;
  visibility: hidden; opacity: 0;
  clip-path: inset(0 0 100% 0);
  transition: clip-path var(--t-reveal) var(--ease-fin), opacity 0s linear var(--t-reveal), visibility 0s linear var(--t-reveal);
}
.gf-menu.is-open { visibility: visible; opacity: 1; clip-path: inset(0 0 0 0); transition: clip-path var(--t-reveal) var(--ease-fin); }
.gf-menu nav ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.2vh; }
.gf-menu nav a {
  display: flex; align-items: baseline; gap: 24px; min-height: 56px;
  font: 300 clamp(40px, 6.4vw, 96px)/1.05 var(--font-sans);
  letter-spacing: -.02em; color: var(--fg-muted);
  transition: color var(--t-ui);
}
html[lang="ar"] .gf-menu nav a { letter-spacing: 0; font-weight: 400; font-size: clamp(36px, 5.6vw, 84px); line-height: 1.35; }
.gf-menu nav a span { font: 400 12px/1 var(--font-mono); color: var(--accent); letter-spacing: .12em; }
.gf-menu nav a:hover, .gf-menu nav a:focus-visible { color: var(--fg); }
.gf-menu .gf-menu-media { position: relative; overflow: hidden; align-self: stretch; }
.gf-menu .gf-menu-media img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transform: scale(1.04); transition: opacity 500ms var(--ease-out), transform 900ms var(--ease-out);
}
.gf-menu .gf-menu-media img.is-on { opacity: 1; transform: scale(1); }
.gf-menu-foot { grid-column: 1 / -1; align-self: end; display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; padding-top: 24px; border-top: 1px solid var(--line); }
.gf-menu-foot button { min-height: 44px; }
@media (max-width: 767px) {
  .gf-menu { grid-template-columns: 1fr; }
  .gf-menu .gf-menu-media { display: none; }
}

/* Prototype badge */
.gf-proto {
  position: fixed; top: calc(var(--header-h) / 2); left: 50%; transform: translate(-50%, -50%); z-index: 60; pointer-events: none; white-space: nowrap;
  font: 400 10px/1 var(--font-mono); letter-spacing: .12em; text-transform: uppercase;
  padding: 7px 10px; border: 1px solid var(--graphite-700); background: var(--charcoal-950); color: var(--fg-muted);
}

@media (max-width: 767px) { .gf-brand small { display: none; } .gf-proto { display: none; } }
html[lang="ar"] .gf-proto { font: 400 12px/1 var(--font-sans-ar); letter-spacing: 0; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 1ms !important; animation-iteration-count: 1 !important; transition-duration: 150ms !important; scroll-behavior: auto !important; }
}
html.gf-reduced *, html.gf-reduced *::before, html.gf-reduced *::after { animation-duration: 1ms !important; transition-duration: 150ms !important; }