/* =========================================================
   STUDIO ERRIS — shared system
   Space Grotesk carries structure (headlines, labels, nav).
   Newsreader carries voice (the studio thinking out loud).
========================================================= */

:root {
  --paper: #f3f1ec;
  --paper-2: #e9e6df;
  --ink: #15171a;
  --ink-2: #3a3c3f;
  --muted: #6b6a66;
  --line: #d9d5cc;
  --accent: #ec4e20;

  --on-ink: #f3f1ec;
  --on-ink-muted: #9b9a95;
  --on-ink-line: #34363a;

  --grotesk: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;

  --m: max(16px, 5vw);              /* page margin */
  --gutter: clamp(16px, 2vw, 28px);
  --section: clamp(5.5rem, 12vw, 12rem);

  --t-display: clamp(2.45rem, 9.2vw, 10.5rem);
  --t-xl: clamp(2.3rem, 5.4vw, 5.75rem);
  --t-l: clamp(1.75rem, 3vw, 2.9rem);
  --t-lead: clamp(1.3rem, 1.75vw, 1.7rem);
  --t-body: 1.0625rem;
  --t-small: .8125rem;

  --ease: cubic-bezier(.2, .7, .2, 1);
}

*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--grotesk);
  font-size: var(--t-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p, ol, ul, figure { margin: 0; }
h1, h2 { text-wrap: balance; }
ol, ul { padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

img { display: block; max-width: 100%; height: auto; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

::selection { background: var(--ink); color: var(--paper); }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- layout primitives ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  padding-inline: var(--m);
}

.serif {
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -.005em;
}

.label {
  font-family: var(--grotesk);
  font-size: var(--t-small);
  font-weight: 500;
  line-height: 1.3;
  color: var(--muted);
}

.arrow {
  display: inline-block;
  transition: transform .35s var(--ease);
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  align-items: center;
  padding: 14px var(--m);
  background: var(--paper);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease;
}

.site-header.is-scrolled { border-bottom-color: var(--line); }

.logo {
  grid-column: 1 / 3;
  width: 58px;
  border-radius: 50%;
}

.logo img { width: 100%; }

.site-header .descriptor {
  grid-column: 4 / 9;
  font-size: var(--t-small);
  color: var(--muted);
}

.site-nav {
  grid-column: 9 / 13;
  display: flex;
  justify-content: flex-end;
  gap: clamp(20px, 2.6vw, 40px);
  font-size: .9375rem;
  font-weight: 500;
}

.site-nav a {
  position: relative;
  padding: 10px 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 6px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .35s var(--ease);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ---------- footer ---------- */

.site-footer {
  padding-block: 28px 32px;
  font-size: var(--t-small);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer > * { grid-column: span 4; }
.site-footer > :last-child { text-align: right; }

.site-footer.on-ink {
  background: var(--ink);
  color: var(--on-ink-muted);
  border-top-color: var(--on-ink-line);
}

/* ---------- small screens ---------- */

@media (max-width: 760px) {
  .site-header { padding-block: 10px; }
  .logo { width: 46px; grid-column: 1 / 4; }
  .site-header .descriptor { display: none; }
  .site-nav {
    grid-column: 4 / 13;
    gap: 22px;
    font-size: .9375rem;
  }

  .site-footer > * { grid-column: 1 / -1; text-align: left; }
  .site-footer > :last-child { text-align: left; }
  .site-footer > * + * { margin-top: 6px; }
}