/* ═══════════════════════════════════════════════════════════════════════════
   MARBLELENS · ACCOUNT
   Sign up / log in belong to this world (§29): a sheet of MarbleLens paper
   placed on the page, not a white SaaS modal dropped on top of it. The fields
   are ordinary labelled inputs — a password manager, a screen reader and a
   keyboard all see exactly what they expect.
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── header account actions · quieter than the brand line (§23) ───────────*/
.nav-account { display: flex; align-items: center; gap: clamp(0.5rem, 1.2vw, 1rem); }
.acct-link {
  border: 0; background: none; cursor: pointer; padding: 0.4em 0.1em;
  font-family: var(--mono); font-size: var(--t-label);
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--graphite);
  transition: color var(--dur-fast) var(--ease-out);
}
.acct-link:hover { color: var(--ink); }
.acct-primary { color: var(--ink); }
.acct-primary::after {
  content: ""; display: block; height: 1px; margin-top: 2px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-out);
}
.acct-primary:hover::after { transform: scaleX(1); }
/* below 900px the account pair folds into the menu sheet, where it has room to
   be a real touch target instead of two cramped words beside CREATE */
@media (max-width: 900px) { .nav-account { display: none; } }
.nav-sep { display: block; height: 1px; background: var(--line); margin: 0.4rem 0; }
.nav-links .acct-link {
  display: flex; align-items: center;      /* same 44px floor as the links */
  min-height: 44px; padding: 0 0.6em; border-radius: 4px; text-align: left;
}
.nav-links .acct-link:hover { background: var(--paper-deep); }

/* ── product entry · the chapter is enterable ────────────────────────────*/
.enter { margin-top: var(--s-5); }
.btn-enter {
  display: inline-flex; align-items: center; gap: 0.7em;
  padding: 0.8em 1.3em; cursor: pointer;
  font-family: var(--sans); font-weight: 600; font-size: var(--t-small);
  color: var(--ink); background: var(--paper-hi);
  border: 1px solid var(--accent); border-radius: var(--radius-sm);
  box-shadow: var(--sh-pin);
  transition: transform var(--dur-fast) var(--ease-mount),
              box-shadow var(--dur-fast) var(--ease-out),
              background var(--dur-fast);
}
.btn-enter:hover { transform: translateY(-2px); box-shadow: var(--sh-mount); background: var(--paper); }
.btn-enter:active { transform: translateY(0) scale(0.985); }
.btn-enter .arr { transition: transform var(--dur-fast) var(--ease-out); }
.btn-enter:hover .arr { transform: translateX(3px); }

/* the conclusion of the website proof */
.build-handoff { margin-top: var(--s-7); text-align: center; }
.btn-lg { padding: 1em 1.7em; font-size: var(--t-body); }

/* ── THE SHEET ───────────────────────────────────────────────────────────*/
dialog.auth {
  padding: 0; border: 0; background: transparent;
  max-width: min(30rem, calc(100vw - 2rem));
  color: var(--ink-2);
}
dialog.auth::backdrop {
  background: rgba(31, 31, 28, 0.42);
  backdrop-filter: blur(3px);
}
.auth-sheet {
  position: relative;
  display: grid; gap: var(--s-3);
  padding: clamp(1.5rem, 4vw, 2.4rem);
  background: var(--paper-hi);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--sh-lift);
  /* placed, with a little weight — the same physics as every other sheet */
  animation: authPlace 0.32s steps(4, end);
}
@keyframes authPlace {
  from { opacity: 0; transform: translateY(-14px) scale(1.02); }
  to   { opacity: 1; transform: none; }
}
.auth-mark {
  font-family: var(--serif); font-weight: 700;
  font-size: 0.72rem; letter-spacing: 0.22em; color: var(--graphite-2);
}
.auth-h { font-family: var(--serif); font-size: var(--t-h3); color: var(--ink); }
.auth-intent {
  font-family: var(--mono); font-size: var(--t-label);
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent-ink);
  margin-top: -0.4rem;
}
.auth-intent b { font-weight: 600; }

.auth-field { display: grid; gap: 0.35em; margin-top: var(--s-2); }
.auth-field label {
  font-family: var(--mono); font-size: var(--t-label);
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--graphite);
}
.auth-field input {
  font: inherit; font-size: var(--t-body); color: var(--ink);
  padding: 0.75em 0.9em; width: 100%;
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius-sm); box-shadow: var(--sh-press);
}
.auth-field input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: var(--sh-press), 0 0 0 3px var(--accent-wash);
}
.auth-hint { font-size: 0.78rem; color: var(--graphite-2); }
.auth-err { min-height: 1.2em; font-size: var(--t-small); color: var(--red); }

.auth-actions { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-2); }
.auth-seam {
  margin-top: var(--s-3); padding-top: var(--s-3);
  border-top: 1px dashed var(--graphite-2);
  font-size: var(--t-small); color: var(--graphite);
}
.auth-x {
  position: absolute; top: 10px; right: 12px;
  border: 0; background: none; cursor: pointer;
  font-size: 0.9rem; line-height: 1; color: var(--graphite-2); padding: 0.4em;
}
.auth-x:hover { color: var(--ink); }

/* ── FOOTER · two-column now that the site is two products ───────────────*/
.footer-grid.two { grid-template-columns: minmax(0, 1.7fr) repeat(2, minmax(0, 1fr)); }
.footer-mail { display: inline-block; margin-top: var(--s-3); font-size: var(--t-small); }
.footer-col .acct-link { text-align: left; padding: 0; font-family: var(--sans);
  font-size: var(--t-small); letter-spacing: 0; text-transform: none; color: var(--ink-2); }
.footer-col .acct-link:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 780px) { .footer-grid.two { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 440px) { .footer-grid.two { grid-template-columns: 1fr; } }

@media (prefers-reduced-motion: reduce) {
  .auth-sheet { animation: none; }
  .btn-enter, .acct-link, .acct-primary::after { transition: none; }
}