/* Sheet 00 · access (login / register)
   Rotating rings based on "Animated Login Form - CSS" by Gogh (codepen.io/Gogh/pen/gOqVqBx),
   redrawn in the blueprint style. */

.access {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(24px, 5vw, 64px);
  align-items: center;
}
.intro .lede + .lede { margin-top: 14px; }

/* ---------- rings ---------- */
.ring {
  position: relative;
  width: min(460px, 82vw);
  aspect-ratio: 1;
  display: flex; justify-content: center; align-items: center;
}
.ring i {
  position: absolute; inset: 0;
  border: 1.5px solid var(--ink-3);
  transition: border-color 0.5s, border-width 0.5s, filter 0.5s;
}
.ring i:nth-child(1) { border-radius: 38% 62% 63% 37% / 41% 44% 56% 59%; animation: spin 6s linear infinite; }
.ring i:nth-child(2) { border-radius: 41% 44% 56% 59% / 38% 62% 63% 37%; animation: spin 4s linear infinite; border-style: dashed; }
.ring i:nth-child(3) { border-radius: 41% 44% 56% 59% / 38% 62% 63% 37%; animation: spin-back 10s linear infinite; }
.ring:hover i,
.ring:focus-within i {
  border-color: var(--clr);
  border-width: 3px;
  filter: drop-shadow(0 0 14px var(--clr));
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spin-back { from { transform: rotate(360deg); } to { transform: rotate(0deg); } }

/* ---------- forms ---------- */
.login {
  position: absolute;
  width: min(280px, 64%);
  height: 100%;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  gap: 14px;
  text-align: center;
}
.login[hidden] { display: none; }
.login h2 { margin: 0; font-size: clamp(30px, 4vw, 40px); }
.seg--auth { width: 100%; margin-bottom: 6px; }
.seg--auth button { padding: 10px 8px; }

.inputBx { width: 100%; }
.inputBx input {
  display: block; width: 100%;
  padding: 11px 14px;
  background: var(--fill);
  border: 1px solid var(--ink-3); border-radius: 0;
  color: var(--ink);
  font: 500 14px var(--mono);
  outline: none;
  transition: border-color 0.2s;
}
.inputBx input::placeholder { color: var(--ink-3); letter-spacing: 0.04em; }
.inputBx input:focus { border-color: var(--cyan); }
.inputBx input[aria-invalid="true"] { border-color: var(--red); }
.inputBx input[type="submit"] {
  background: var(--ink); border-color: var(--ink); color: var(--on-ink);
  font: 700 11.5px var(--mono); letter-spacing: 0.1em; text-transform: uppercase;
  cursor: pointer;
}
.inputBx input[type="submit"]:hover { background: var(--cyan); border-color: var(--cyan); }
.inputBx input[type="submit"]:disabled { opacity: 0.6; cursor: wait; }
.inputBx .btn { width: 100%; }

.links {
  width: 100%;
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
  font: 600 10.5px var(--mono); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-3);
}
.links a { color: var(--cyan); text-decoration: none; }
.links a:hover { color: var(--amber); }
.links:has(> a:only-child) { justify-content: center; }

.msg { margin: 0; min-height: 1.2em; font: 12px/1.45 var(--mono); color: var(--red); }
.msg.ok { color: var(--cyan); }
.note { margin: 0; font-size: 15px; line-height: 1.5; color: var(--ink-2); }
.note strong { color: var(--amber); word-break: break-all; }

.demo-banner {
  position: fixed; left: 50%; bottom: 16px; transform: translateX(-50%);
  max-width: calc(100% - 32px); margin: 0;
  padding: 8px 14px;
  border: 1px dashed var(--amber); background: var(--paper-deep);
  font: 11px/1.5 var(--mono); color: var(--ink-2); text-align: center;
}
.demo-banner code { color: var(--amber); }

/* ---------- small screens ---------- */
@media (max-width: 900px) {
  .access { grid-template-columns: 1fr; justify-items: center; overflow-x: clip; } /* spinning rings poke past the edge on phones */
  .intro { max-width: 560px; }
  .demo-banner { position: static; transform: none; margin: 0 auto 24px; }
}
@media (max-width: 420px) {
  .login { gap: 9px; width: 68%; }
  .inputBx input { padding: 9px 10px; font-size: 13px; }
  .links { font-size: 9.5px; letter-spacing: 0.06em; }
}