:root {
  --bg: #000000;
  --surface: #0c0c0e;
  --surface-2: #141417;
  --ink: #f4f4f5;
  --muted: #c4c4cc;
  --line: #232328;
  --brand: #f4f4f5;
  --brand-2: #d4d4d8;
  --brand-ink: #09090b;
  --brand-soft: #27272c;
  --link: #60a5fa;
  --danger: #f87171;
  --danger-soft: #35181d;
  --display: Arial, Helvetica, sans-serif;
  --body: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #0c0c0e;
    --surface-2: #141417;
    --ink: #f4f4f5;
    --muted: #c4c4cc;
    --line: #232328;
    --brand: #f4f4f5;
    --brand-2: #d4d4d8;
    --brand-ink: #09090b;
    --brand-soft: #27272c;
    --link: #60a5fa;
    --danger: #f87171;
    --danger-soft: #35181d;
  }
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-padding-top: env(safe-area-inset-top, 0px);
  color-scheme: dark;
}
body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.45 var(--body);
  -webkit-tap-highlight-color: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* top banner */
.banner {
  width: 100%;
  padding: 38px 20px 92px;
  text-align: center;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: none;
}
.seal {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
  position: relative;
  z-index: 1;
  box-shadow: 0 10px 24px -10px rgba(0, 0, 0, 0.35);
  padding: 6px;
}
.seal img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
}
.banner h1 {
  position: relative;
  z-index: 1;
  color: #fff;
  font: 800 24px/1.25 var(--display);
  letter-spacing: -0.01em;
  margin: 0;
  max-width: 320px;
  margin-inline: auto;
}

/* card, pulled up to overlap the banner */
.wrap {
  width: 100%;
  max-width: 420px;
  padding: 0 18px;
  margin-top: -62px;
  position: relative;
  z-index: 2;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 22px 20px 26px;
  box-shadow:
    0 1px 2px rgba(20, 20, 30, 0.04),
    0 24px 48px -24px rgba(20, 20, 30, 0.28);
}
.card.shake {
  animation: shake 0.32s;
}
@keyframes shake {
  10%,
  90% {
    transform: translateX(-1px);
  }
  20%,
  80% {
    transform: translateX(2px);
  }
  30%,
  50%,
  70% {
    transform: translateX(-4px);
  }
  40%,
  60% {
    transform: translateX(4px);
  }
}

/* pill tabs */
.seg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  padding: 4px;
  background: var(--surface-2);
  border-radius: 12px;
  margin-bottom: 20px;
}
.seg label {
  position: relative;
}
.seg input {
  position: absolute;
  opacity: 0;
  inset: 0;
  margin: 0;
  cursor: pointer;
}
.seg span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 9px;
  font: 700 14px var(--body);
  color: var(--muted);
}
.seg input:checked + span {
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(20, 20, 30, 0.14);
}
.seg input:focus-visible + span {
  outline: 3px solid var(--brand);
  outline-offset: 1px;
}

h2 {
  font: 700 18px var(--body);
  margin: 0 0 16px;
  text-align: center;
}

/* fields: flat fill, no visible border */
.field {
  margin-bottom: 12px;
}
.field label {
  display: block;
  font: 600 12.5px var(--body);
  color: var(--muted);
  margin-bottom: 5px;
  margin-left: 2px;
}
.field input {
  width: 100%;
  min-height: 48px;
  padding: 10px 14px;
  border-radius: 11px;
  border: 1.5px solid transparent;
  background: var(--surface-2);
  color: var(--ink);
  font-size: 16px;
}
.field input::placeholder {
  color: var(--muted);
  opacity: 1;
}
.field input:focus-visible {
  outline: none;
  border-color: var(--brand);
  background: var(--surface);
}
.pw-row {
  position: relative;
}
.pw-row input {
  padding-right: 46px;
}
.pw-toggle {
  position: absolute;
  right: 4px;
  top: 4px;
  bottom: 4px;
  width: 40px;
  border: 0;
  background: transparent;
  color: var(--muted);
  display: grid;
  place-items: center;
  border-radius: 8px;
  cursor: pointer;
}
.pw-toggle:hover {
  background: var(--line);
}
.pw-toggle:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.err {
  display: none;
  background: var(--danger-soft);
  color: var(--danger);
  font: 600 13px var(--body);
  padding: 9px 12px;
  border-radius: 10px;
  margin: 2px 0 14px;
  overflow-wrap: anywhere;
}
.err.show {
  display: block;
}

/* amber button */
.btn {
  width: 100%;
  min-height: 48px;
  border: 0;
  border-radius: 12px;
  color: var(--brand-ink);
  background: var(--brand);
  font: 700 15.5px var(--body);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  transition:
    transform 0.12s ease,
    opacity 0.12s ease;
  margin-top: 6px;
  box-shadow: 0 10px 20px -10px rgba(244, 244, 245, 0.35);
}
.btn:active {
  transform: scale(0.98);
}
.btn:disabled {
  opacity: 0.75;
  cursor: default;
}
.btn:hover:not(:disabled) {
  filter: brightness(0.92);
}
.spin {
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 2.5px solid rgba(9, 9, 11, 0.28);
  border-top-color: var(--brand-ink);
  display: none;
  animation: spin 0.7s linear infinite;
}
.btn.loading .spin {
  display: inline-block;
}
.btn.loading .btn-label {
  opacity: 0.85;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .spin {
    animation: none;
  }
}

.note {
  text-align: center;
  font-size: 12.5px;
  color: var(--muted);
  margin: 16px 0 0;
  line-height: 1.5;
}
.note b {
  color: var(--ink);
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 22px 0 28px;
  color: var(--link);
  font: 700 14px var(--body);
  text-decoration: none;
}
.back:hover {
  text-decoration: underline;
}
.back svg {
  flex: none;
}

@media (prefers-reduced-motion: no-preference) {
  .wrap {
    animation: up 0.25s ease-out;
  }
}
@keyframes up {
  from {
    transform: translateY(10px);
    opacity: 0;
  }
  to {
    transform: none;
    opacity: 1;
  }
}
@media (max-width: 360px) {
  .banner {
    padding: 28px 16px 82px;
  }
  .banner h1 {
    font-size: 21px;
  }
  .wrap {
    padding-inline: 12px;
  }
  .card {
    padding-inline: 16px;
  }
}