/* =========================================================================
   Arx Research Circle — base styles
   Tokens, typography, header, logo animation, buttons, footer.
   Shared by every page. Dark-first, single look.
   ========================================================================= */

:root {
  /* Colour */
  --bg: #121212;
  --bg-raise: #1a1917;
  --fg: #ede8e0;
  --fg-soft: #d9d3ca;
  --muted: #9a938a;
  --line: #2b2926;
  --accent: #c4a27a;

  /* Type */
  --display: "Schibsted Grotesk", "Helvetica Neue", Arial, sans-serif;
  --body: "Schibsted Grotesk", "Helvetica Neue", Arial, sans-serif;
  --read: "Newsreader", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  /* Layout */
  --gutter: clamp(16px, 4vw, 56px);
  --max: 1240px;
  --head-h: 68px;

  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--head-h) + 16px);
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 400 17px/1.6 var(--body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap { max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }
.label {
  font: 500 12px/1.3 var(--mono); letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); margin: 0;
}
.skip-link {
  position: absolute; left: 16px; top: -100px; z-index: 100;
  background: var(--fg); color: var(--bg); padding: 10px 16px; border-radius: 6px;
  font: 600 14px/1 var(--display); text-decoration: none;
}
.skip-link:focus { top: 12px; }

/* ---------- Header ---------- */
.site-head {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.head-row { display: flex; align-items: center; gap: 28px; height: var(--head-h); }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.brand svg { width: 46px; height: auto; overflow: visible; }
.brand svg path { fill: none; stroke: var(--fg); stroke-width: 15; stroke-linecap: round; stroke-linejoin: round; }
.brand span { font: 600 15px/1.1 var(--display); letter-spacing: .01em; }
.brand small {
  display: block; font: 400 11px/1.2 var(--mono); color: var(--muted);
  letter-spacing: .08em; text-transform: uppercase; margin-top: 3px;
}
.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a { font-size: 14px; color: var(--muted); text-decoration: none; transition: color .2s; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--fg); }
.lms {
  display: inline-flex; align-items: center; gap: 8px; flex-shrink: 0;
  padding: 10px 18px; border-radius: 999px;
  background: var(--fg); color: var(--bg); text-decoration: none;
  font: 600 14px/1 var(--display); transition: background .2s;
}
.lms:hover { background: var(--accent); }
.lms svg { width: 14px; height: 14px; }

/* ---------- Mobile navigation ---------- */
.nav-toggle {
  display: none; margin-left: auto; flex-shrink: 0;
  width: 42px; height: 42px; padding: 0; border: 1px solid var(--line);
  border-radius: 999px; background: transparent; color: var(--fg);
  cursor: pointer; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  transition: border-color .2s, background .2s;
}
.nav-toggle:hover { border-color: var(--accent); }
.nav-toggle span {
  display: block; width: 16px; height: 1.6px; border-radius: 2px;
  background: currentColor;
  transition: transform .28s cubic-bezier(.35,.05,.28,1), opacity .2s;
}
@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; }
  .lms { margin-left: 0; }
  .head-row { gap: 14px; }
  .brand { margin-right: auto; }
  .nav {
    position: absolute; top: 100%; left: 0; right: 0;
    display: flex; flex-direction: column; gap: 0;
    margin-left: 0; padding: 8px var(--gutter) 18px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    opacity: 0; transform: translateY(-8px);
    visibility: hidden; pointer-events: none;
    transition: opacity .25s ease, transform .25s cubic-bezier(.35,.05,.28,1), visibility 0s .25s;
  }
  .site-head[data-open="true"] .nav {
    opacity: 1; transform: translateY(0);
    visibility: visible; pointer-events: auto;
    transition: opacity .25s ease, transform .25s cubic-bezier(.35,.05,.28,1), visibility 0s;
  }
  .nav a {
    padding: 13px 2px; font-size: 16px;
    border-bottom: 1px solid var(--line);
    opacity: 0; transform: translateY(-6px);
    transition: opacity .3s ease, transform .3s cubic-bezier(.35,.05,.28,1), color .2s;
  }
  .nav a:last-child { border-bottom: 0; }
  .site-head[data-open="true"] .nav a { opacity: 1; transform: translateY(0); }
  .site-head[data-open="true"] .nav a:nth-child(1) { transition-delay: .05s; }
  .site-head[data-open="true"] .nav a:nth-child(2) { transition-delay: .09s; }
  .site-head[data-open="true"] .nav a:nth-child(3) { transition-delay: .13s; }
  .site-head[data-open="true"] .nav a:nth-child(4) { transition-delay: .17s; }
  .site-head[data-open="true"] .nav a:nth-child(5) { transition-delay: .21s; }
  .site-head[data-open="true"] .nav a:nth-child(6) { transition-delay: .25s; }
  .site-head[data-open="true"] .nav-toggle span:nth-child(1) { transform: translateY(6.6px) rotate(45deg); }
  .site-head[data-open="true"] .nav-toggle span:nth-child(2) { opacity: 0; }
  .site-head[data-open="true"] .nav-toggle span:nth-child(3) { transform: translateY(-6.6px) rotate(-45deg); }
}
@media (max-width: 420px) {
  .brand small { display: none; }
  .lms { padding: 9px 14px; font-size: 13px; }
}

/* ---------- Logo animation ----------
   One continuous stroke draws the A, then the star twinkles forever.
   Used by the header mark (.brand) and the large hero mark (.mark). */
.brand .draw, .mark .draw {
  stroke-dasharray: 1; stroke-dashoffset: 1;
  animation: logo-draw 2.4s cubic-bezier(.35,.05,.28,1) .2s forwards;
}
.mark .draw { animation-duration: 3s; animation-delay: .3s; }
.brand .star, .mark .star {
  fill: var(--accent); stroke: none; opacity: 0;
  transform-box: fill-box; transform-origin: center;
  animation: logo-twinkle 1.55s ease-in-out 2.6s infinite;
}
.mark .star { animation-delay: 3.3s; }
@keyframes logo-draw { to { stroke-dashoffset: 0; } }
@keyframes logo-twinkle {
  0%, 100% { opacity: .15; transform: translateY(8%) scale(.55); }
  28%, 62% { opacity: 1;   transform: translateY(-8%) scale(1); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 26px; border-radius: 999px; text-decoration: none;
  font: 600 15px/1 var(--display); border: 1px solid var(--line);
  transition: background .2s, border-color .2s, color .2s;
}
.btn.primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn.primary:hover { background: var(--fg); border-color: var(--fg); }
.btn.ghost:hover { border-color: var(--fg); }

/* ---------- Footer ---------- */
.site-foot { border-top: 1px solid var(--line); padding-block: 44px 56px; }
.foot {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: 32px; font-size: 14px; color: var(--muted);
}
.foot b { color: var(--fg); font-weight: 600; display: block; margin-bottom: 8px; }
.foot p { margin: 0; }
.foot a { text-decoration: none; }
.foot a:hover { color: var(--fg); }
.fine { font: 400 12px/1.6 var(--mono); color: var(--muted); margin: 36px 0 0; letter-spacing: .02em; }
@media (max-width: 820px) { .foot { grid-template-columns: 1fr; } }

/* ---------- Motion preferences ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .brand .draw, .mark .draw { animation: none; stroke-dashoffset: 0; }
  .brand .star, .mark .star { animation: none; opacity: 1; }
}