/* === Auth =============================================================
 * Sign in / Sign up screen — light SaaS panel with gradient border
 * and gentle animated background washes.
 * ===================================================================== */

.auth {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  overflow: hidden;
  padding: var(--s-6);
}

.auth__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 28%, var(--primary-tint), transparent 50%),
    radial-gradient(circle at 82% 72%, var(--indigo-tint), transparent 50%),
    radial-gradient(circle at 50% 100%, var(--amber-tint), transparent 60%);
  pointer-events: none;
  animation: bgShift 32s ease-in-out infinite alternate;
}
@keyframes bgShift {
  from { transform: scale(1) rotate(0deg); }
  to   { transform: scale(1.06) rotate(1.5deg); }
}

.auth__panel {
  position: relative;
  width: 100%;
  max-width: 440px;
  padding: var(--s-12) var(--s-10) var(--s-8);
  background: var(--surface);
  border: 1px solid var(--b1);
  border-radius: var(--r);
  box-shadow: var(--sh-4);
  animation: panelIn 700ms var(--ease);
  z-index: 1;
}

/* Subtle gradient border ring */
.auth__panel::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: var(--r);
  padding: 1px;
  background: linear-gradient(135deg,
    var(--primary) 0%,
    transparent 30%,
    transparent 70%,
    var(--indigo) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
          mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: 0.35;
  pointer-events: none;
}

@keyframes panelIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); }
  to   { opacity: 1; transform: none; }
}

.auth__head {
  text-align: center;
  margin-bottom: var(--s-6);
}

.auth__mark {
  display: inline-flex;
  align-items: baseline;
  font-family: var(--fd);
  font-weight: var(--w-bold);
  font-size: 56px;
  letter-spacing: -0.04em;
  line-height: 0.9;
  margin-bottom: var(--s-3);
}
.auth__mark-d { color: var(--tx); }
.auth__mark-b { color: var(--primary); }

.auth__mark-sub {
  font-family: var(--fb);
  font-size: 10px;
  font-weight: var(--w-semibold);
  color: var(--t3);
  letter-spacing: 0.4em;
  text-transform: uppercase;
  margin-bottom: var(--s-5);
}
.auth__mark-sub::before, .auth__mark-sub::after {
  content: "—";
  margin: 0 var(--s-2);
  color: var(--t4);
}

.auth__title {
  font-family: var(--fd);
  font-size: var(--text-xl);
  font-weight: var(--w-semibold);
  color: var(--tx);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 6px;
}

.auth__subtitle {
  font-size: var(--text-sm);
  color: var(--t2);
  max-width: 300px;
  margin: 0 auto;
  line-height: 1.5;
}

.auth__form {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.auth__error {
  font-size: var(--text-sm);
  color: var(--negative);
  background: var(--negative-tint);
  border-radius: var(--rs);
  padding: 10px 12px;
  line-height: 1.4;
}

.auth__alt {
  margin-top: var(--s-2);
}
.auth__alt .btn {
  font-size: var(--text-sm);
  color: var(--t3);
}
.auth__alt .btn:hover {
  color: var(--primary-deep);
  background: transparent;
}

.auth__foot {
  margin-top: var(--s-8);
  text-align: center;
  border-top: 1px solid var(--b1);
  padding-top: var(--s-4);
}
.auth__foot-line {
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: 0.1em;
  color: var(--t3);
}