/* ============================================================
   GATE GROUP — shared design system
   Graphite · White · Petrol (primary) · Burgundy (secondary)
   Helvetica Neue · Swiss restraint
   ============================================================ */

:root {
  --graphite: #16181A;
  --graphite-2: #1F2225;
  --ink: #16181A;
  --paper: #F8F8F6;
  --paper-2: #FFFFFF;
  --mist: #ECEDEA;
  --petrol: #1F4E48;
  --petrol-bright: #2C6A60;
  --burgundy: #6B2230;
  --steel: #8C9091;
  --steel-d: #54585A;
  --hair: #E2E3DF;
  --hair-dark: rgba(255,255,255,0.12);

  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas, monospace;

  --maxw: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
}

* { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* ---- layout ---- */
.container { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(64px, 11vh, 132px); }
.section--tight { padding-block: clamp(48px, 8vh, 88px); }
.dark { background: var(--graphite); color: var(--paper); }
.dark .muted { color: rgba(255,255,255,0.6); }
.hair { height: 1px; background: var(--hair); border: 0; margin: 0; }
.dark .hair { background: var(--hair-dark); }

/* ---- type ---- */
.eyebrow {
  font-size: 11px; font-weight: 600; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--steel); margin: 0;
}
.eyebrow--petrol { color: var(--petrol); }
.dark .eyebrow { color: var(--petrol-bright); }
.dark .eyebrow--steel { color: rgba(255,255,255,0.5); }

h1, h2, h3, h4 { font-weight: 500; letter-spacing: -0.025em; margin: 0; line-height: 1.04; }
.display {
  font-size: clamp(40px, 6.4vw, 84px);
  font-weight: 500; letter-spacing: -0.03em; line-height: 0.98;
}
.h1 { font-size: clamp(34px, 5vw, 60px); }
.h2 { font-size: clamp(28px, 3.6vw, 46px); }
.h3 { font-size: clamp(20px, 2.2vw, 27px); font-weight: 600; letter-spacing: -0.015em; }
.lead { font-size: clamp(18px, 1.6vw, 21px); line-height: 1.55; color: var(--steel-d); font-weight: 400; }
.dark .lead { color: rgba(255,255,255,0.66); }
.muted { color: var(--steel-d); }
.mono { font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; color: var(--steel); }
.measure { max-width: 56ch; }
.measure-sm { max-width: 42ch; }

/* ---- buttons / links ---- */
.btn {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  padding: 14px 22px; background: var(--petrol); color: var(--paper);
  border: 0; cursor: pointer; transition: background .25s ease, transform .25s ease;
}
.btn:hover { background: var(--petrol-bright); }
.btn .arr { transition: transform .25s ease; }
.btn:hover .arr { transform: translateX(4px); }
.btn--ghost { background: transparent; color: inherit; border: 1px solid currentColor; }
.btn--ghost:hover { background: currentColor; }
.btn--ghost:hover span { color: var(--graphite); }

.link-ul {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase;
  padding-bottom: 6px; position: relative;
}
.link-ul::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 100%;
  background: currentColor; transform-origin: left; transform: scaleX(1); transition: transform .3s ease;
}
.link-ul:hover .arr { transform: translateX(4px); }
.link-ul .arr { transition: transform .25s ease; }

/* ---- header / nav ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--hair);
  transition: background .35s ease, border-color .35s ease, color .35s ease;
}
.site-header.transparent { background: transparent; backdrop-filter: none; border-bottom-color: transparent; }
.site-header.on-dark {
  background: color-mix(in srgb, var(--graphite) 80%, transparent);
  border-bottom-color: var(--hair-dark); color: var(--paper);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-links a {
  font-size: 13px; letter-spacing: 0.06em; color: var(--steel-d); position: relative; padding: 4px 0;
  transition: color .2s ease;
}
.on-dark .nav-links a { color: rgba(255,255,255,0.62); }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: inherit; }
.on-dark .nav-links a:hover, .on-dark .nav-links a[aria-current="page"] { color: var(--paper); }
.nav-links a[aria-current="page"]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px; background: var(--petrol);
}
.nav-cta { font-size: 13px; letter-spacing: 0.06em; }

/* ---- logo lockup ---- */
.logo { display: inline-flex; align-items: center; gap: 12px; }
.logo .mark { width: 26px; height: 26px; flex: none; }
.logo .wordmark { font-weight: 600; letter-spacing: 0.2em; font-size: 15px; }

/* ---- portal mark (svg uses currentColor for frame, var for threshold) ---- */
.mark .frame { fill: currentColor; }
.mark .thresh { fill: var(--petrol); }
.on-dark .mark .thresh, .dark .mark .thresh { fill: var(--petrol-bright); }

/* ---- image placeholders / slots ---- */
image-slot { display: block; width: 100%; background: var(--mist); }
.dark image-slot { background: #23262A; }
/* cohesive, art-directed grade so stock/dropped photos read as one muted, cool set */
image-slot[src] { filter: grayscale(0.5) contrast(1.05) brightness(0.97); }
.ph {
  position: relative; width: 100%; background: var(--mist);
  background-image: repeating-linear-gradient(135deg, rgba(0,0,0,0.045) 0 1px, transparent 1px 10px);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.ph::after {
  content: attr(data-label);
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--steel);
}

/* ---- grids ---- */
.grid { display: grid; gap: clamp(20px, 3vw, 44px); }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }

/* ---- numbered item ---- */
.numbered { border-top: 2px solid var(--petrol); padding-top: 18px; }
.numbered.alt { border-top-color: var(--burgundy); }
.numbered .idx { font-family: var(--mono); font-size: 12px; color: var(--steel); margin-bottom: 14px; }

/* ---- stat ---- */
.stat .figure { font-size: clamp(40px, 5vw, 64px); font-weight: 500; letter-spacing: -0.03em; line-height: 1; }
.stat .figure .mono-unit { font-family: var(--mono); font-size: 0.4em; vertical-align: middle; letter-spacing: 0; color: var(--steel); }
.stat .label { margin-top: 12px; font-size: 14px; color: var(--steel-d); }
.dark .stat .label { color: rgba(255,255,255,0.6); }

/* ---- footer ---- */
.site-footer { background: var(--graphite); color: var(--paper); padding-block: clamp(56px, 8vh, 88px); }
.site-footer a { color: rgba(255,255,255,0.7); }
.site-footer a:hover { color: var(--paper); }

/* ---- form ---- */
.field { display: flex; flex-direction: column; gap: 9px; }
.field label { font-size: 11px; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--steel); }
.field input, .field select, .field textarea {
  font-family: var(--sans); font-size: 16px; color: var(--ink);
  background: var(--paper-2); border: 1px solid var(--hair); padding: 14px 16px; width: 100%;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.field textarea { resize: vertical; min-height: 130px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--petrol); box-shadow: 0 0 0 3px color-mix(in srgb, var(--petrol) 14%, transparent);
}

/* ---- reveal animation (hidden state only applies when JS is active) ---- */
@media (prefers-reduced-motion: no-preference) {
  html.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
  html.js .reveal.in { opacity: 1; transform: none; }
  html.js .reveal[data-d="1"] { transition-delay: .08s; }
  html.js .reveal[data-d="2"] { transition-delay: .16s; }
  html.js .reveal[data-d="3"] { transition-delay: .24s; }
}

/* ---- menu toggle ---- */
.menu-toggle { display: none; background: none; border: 0; color: inherit; font-size: 24px; line-height: 1; cursor: pointer; padding: 4px 6px; }

/* ---- responsive ---- */
@media (max-width: 880px) {
  .cols-2, .cols-3, .cols-4 { grid-template-columns: 1fr; }
  .menu-toggle { display: block; }
  .nav-links {
    position: fixed; top: 76px; left: 0; right: 0; bottom: 0;
    display: none; flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--hair); padding: 6px 0;
    z-index: 60; overflow-y: auto;
  }
  .nav-links.show { display: flex; }
  .on-dark .nav-links { background: var(--graphite); border-bottom-color: var(--hair-dark); }
  .nav-links a { padding: 15px var(--gutter); border-top: 1px solid var(--hair); }
  .on-dark .nav-links a { border-top-color: var(--hair-dark); }
  .nav-cta { padding-block: 18px !important; }
  .hide-mobile { display: none !important; }
  .site-footer .grid { grid-template-columns: 1fr !important; gap: 36px !important; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
}