/* ============================================================================
   Tacit: shared site chrome. Loaded by every page after tacit.css.
   The top bar (inner pages), the menu dialog (every page), the form states,
   the skip link.
   ========================================================================== */

.skip {
  position: absolute; left: var(--pad); top: -4rem; z-index: 100;
  padding: 0.6rem 0.9rem; border-radius: var(--sc-r-sm);
  background: var(--you-ink); color: var(--you-canvas); font-weight: 500;
  text-decoration: none; transition: top var(--sc-d-fast) var(--sc-ease-out);
}
.skip:focus-visible { top: var(--sc-4); }

/* ----------------------------------------------------------------- bar -- */
.bar {
  position: sticky; top: 0; z-index: var(--sc-z-chrome);
  display: grid; grid-template-columns: auto 1fr auto auto; align-items: center;
  gap: var(--sc-5);
  padding: var(--sc-4) var(--pad);
  background: color-mix(in oklab, var(--you-canvas) 86%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sc-hairline);
}
/* The drawn wordmark. Sized by height; the SVG carries its own proportions. */
.bar__mark { display: block; line-height: 0; border-radius: var(--sc-r-sm); }
.bar__mark img, .menu__logo { display: block; height: 24px; width: auto; }
.divider__menu {
  font-family: var(--sc-font-display); font-weight: 600; font-size: 0.95rem;
  letter-spacing: var(--sc-track-snug); line-height: 1;
  color: var(--you-canvas); background: var(--you-ink);
  padding: 0.35rem 0.7rem; border-radius: var(--sc-r-sm);
  text-decoration: none; border: 0; cursor: pointer;
  box-shadow: var(--sc-e1);
}
.bar__mark:active, .divider__menu:active { transform: translateY(1px); }
.bar__nav { display: flex; gap: var(--sc-5); justify-content: center; }
.bar__nav a {
  font-size: var(--sc-t-sm); font-weight: 500; color: var(--you-soft);
  text-decoration: none; padding: 0.3rem 0; position: relative;
  transition: color var(--sc-d-fast) var(--sc-ease-out);
}
.bar__nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1.5px;
  background: var(--you-accent); transform: scaleX(0); transform-origin: 0 50%;
  transition: transform var(--sc-d-fast) var(--sc-ease-out);
}
.bar__nav a:hover { color: var(--you-ink); }
.bar__nav a[aria-current="page"] { color: var(--you-ink); }
.bar__nav a[aria-current="page"]::after, .bar__nav a:hover::after { transform: scaleX(1); }
.bar__cta {
  font-size: var(--sc-t-sm); font-weight: 500; color: var(--you-ink);
  text-decoration: underline; text-decoration-thickness: 1.5px;
  text-decoration-color: var(--you-accent); text-underline-offset: 0.25em;
  white-space: nowrap;
}
.bar__cta:hover { text-decoration-color: var(--you-ink); }
.bar__menu {
  font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: var(--sc-track-wide);
  text-transform: uppercase; color: var(--you-ink); background: transparent;
  border: 1px solid var(--sc-hairline-strong); border-radius: var(--sc-r-sm);
  padding: 0.45rem 0.6rem; cursor: pointer;
}
.bar__menu:active { transform: translateY(1px); }

/* The home page's menu control lives on the divider, under the wordmark. */
.divider__menu {
  position: absolute; top: calc(var(--sc-5) + 34px + 0.6rem); left: 50%; translate: -50% 0;
  font-family: var(--sc-font-mono); font-weight: 500; font-size: var(--sc-t-xs);
  letter-spacing: var(--sc-track-wide); text-transform: uppercase;
  padding: 0.35rem 0.55rem;
  transition: opacity var(--sc-d-base) var(--sc-ease-out);
}
.is-collapsing .divider__menu { opacity: calc(1 - var(--collapse) * 1.6); }

/* ---------------------------------------------------------------- menu -- */
.menu {
  border: 0; padding: 0; max-width: none; max-height: none;
  width: 100vw; height: 100dvh; inset: 0;
  background: var(--you-canvas); color: var(--you-ink);
  --sc-ink: var(--you-ink); --sc-ink-soft: var(--you-soft); --sc-accent: var(--you-accent);
}
.menu::backdrop { background: transparent; }
.menu__inner {
  min-height: 100%; display: grid; grid-template-rows: auto 1fr auto;
  padding: var(--sc-4) var(--pad) var(--sc-6);
  max-width: 72rem; margin-inline: auto; width: 100%;
}
.menu__top { display: flex; justify-content: space-between; align-items: center; }
.menu__close {
  font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: var(--sc-track-wide);
  text-transform: uppercase; color: var(--you-ink); background: transparent;
  border: 1px solid var(--sc-hairline-strong); border-radius: var(--sc-r-sm);
  padding: 0.45rem 0.6rem; cursor: pointer;
}
.menu__close:active { transform: translateY(1px); }
.menu__list { list-style: none; margin: 0; padding: var(--sc-8) 0 0; display: grid; gap: var(--sc-2); align-content: center; }
.menu__list a {
  font-family: var(--sc-font-display); font-variation-settings: "opsz" 96;
  font-weight: 500; font-size: clamp(2rem, 1.2rem + 3.4vw, 4.2rem);
  letter-spacing: var(--sc-track-tight); line-height: 1.05;
  color: var(--you-ink); text-decoration: none; display: inline-block;
  padding: 0.1em 0; border-bottom: 2px solid transparent;
  transition: border-color var(--sc-d-fast) var(--sc-ease-out);
}
.menu__list a:hover, .menu__list a:focus-visible { border-bottom-color: var(--you-accent); }
.menu__list a[aria-current="page"] { color: var(--you-soft); }
.menu__sub { display: flex; flex-wrap: wrap; gap: var(--sc-3) var(--sc-6); margin: 0; padding: var(--sc-7) 0 0; list-style: none; }
.menu__sub a {
  font-family: var(--sc-font-mono); font-size: var(--sc-t-xs); letter-spacing: var(--sc-track-wide);
  text-transform: uppercase; color: var(--you-soft); text-decoration: none;
}
.menu__sub a:hover { color: var(--you-ink); }
.menu__foot { font-size: var(--sc-t-xs); color: var(--you-soft); display: flex; gap: var(--sc-5); flex-wrap: wrap; }

/* home footer links. Lives here, not in pages.css: the home page must not
   load pages.css, whose layout classes are scoped to inner pages. */
.foot__nav { display: flex; flex-wrap: wrap; gap: var(--sc-4); }
.foot__nav a { color: var(--sc-ink-soft); text-decoration: none; }
.foot__nav a:hover { color: var(--sc-ink); }

/* ---------------------------------------------------------------- form -- */
.form { display: grid; gap: var(--sc-5); max-width: 40rem; }
.form__row { display: grid; gap: var(--sc-2); }
.form__row label { font-weight: 500; color: var(--sc-ink); }
.form__row .hint { margin: 0; font-size: var(--sc-t-sm); color: var(--sc-ink-soft); }
.form__row input, .form__row textarea {
  width: 100%; font-family: var(--sc-font-text); font-size: var(--sc-t-base);
  padding: 0.8rem 0.95rem; border-radius: var(--sc-r-sm);
  background: var(--sc-surface); color: var(--sc-ink);
  border: 1px solid color-mix(in oklab, var(--sc-ink) 32%, transparent);
  box-shadow: var(--sc-e1), var(--sc-edge);
  transition: border-color var(--sc-d-fast) var(--sc-ease-out);
}
.form__row textarea { min-height: 8rem; resize: vertical; line-height: 1.5; }
.form__row input:hover, .form__row textarea:hover { border-color: color-mix(in oklab, var(--sc-ink) 50%, transparent); }
.form__row input:focus-visible, .form__row textarea:focus-visible { outline: 2px solid var(--sc-accent); outline-offset: 2px; border-color: var(--sc-accent); }
.form__row input[aria-invalid="true"], .form__row textarea[aria-invalid="true"] { border-color: var(--sc-accent); }
.form__hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form__actions { display: flex; align-items: center; gap: var(--sc-5); flex-wrap: wrap; }
.form__status { margin: 0; font-family: var(--sc-font-mono); font-size: var(--sc-t-sm); color: var(--sc-ink-soft); }
.form__status[data-state="sent"] { color: var(--sc-ink); }
.form__status[data-state="failed"], .form__status[data-state="unconfigured"] { color: var(--sc-accent); }
.cta[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; }
.cta:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* --------------------------------------------------------------- mobile -- */
@media (max-width: 860px) {
  .bar { grid-template-columns: auto 1fr auto; gap: var(--sc-4); padding: var(--sc-3) var(--pad); }
  .bar__nav { display: none; }
  .bar__cta { display: none; }
  .divider__menu { top: 50%; left: auto; right: var(--pad); translate: 0 -50%; font-size: 0.6rem; padding: 0.3rem 0.45rem; }
  .menu__list { padding-top: var(--sc-6); }
}
@media (min-width: 861px) {
  .bar__menu { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .bar__nav a::after { transition: none; }
}