.auth-form-register {
  --auth-error-color: #ff9daa;
}

body.theme-light .auth-form-register {
  --auth-error-color: #b3263b;
}

html body.auth-page-body #auth-page-form.auth-form-register .auth-field-error {
  display: block;
  margin: 5px 0 0;
  color: var(--auth-error-color) !important;
  font-size: 0.8rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

html body.auth-page-body .auth-form-register input[aria-invalid='true'] {
  border-color: var(--auth-error-color) !important;
}

.auth-form-register .auth-field-status {
  display: block;
  margin: 5px 0 0;
  color: var(--ui-muted);
  font-size: 0.8rem;
  line-height: 1.55;
}

.auth-form-register .auth-field-error[hidden],
.auth-form-register .auth-field-status[hidden] {
  display: none !important;
}

.community-agreement {
  margin-top: 10px;
  padding-top: 26px;
  border-top: 1px solid var(--ui-line);
}

.community-agreement-heading,
.band-challenge-heading,
.band-challenge-legend,
.band-position-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.community-agreement-heading h2 {
  margin: 0;
  font-size: 1.15rem;
  color: var(--ui-text);
}

.community-agreement-heading > span,
.band-challenge-eyebrow,
.band-challenge-legend,
.band-position-heading {
  color: var(--ui-muted);
  font-size: 0.78rem;
}

.community-agreement-rules {
  list-style: none;
  counter-reset: covenant;
  padding: 0;
  margin: 18px 0;
}

.community-agreement-rules li {
  counter-increment: covenant;
  display: grid;
  grid-template-columns: 24px 110px minmax(0, 1fr);
  align-items: baseline;
  gap: 8px;
  padding: 10px 0;
  font-size: 0.83rem;
  line-height: 1.7;
}

.community-agreement-rules li::before {
  content: '0' counter(covenant);
  font:
    0.7rem ui-monospace,
    monospace;
  color: var(--ui-muted);
}

.community-agreement-rules strong {
  color: var(--ui-text);
  font-weight: 600;
}

.community-agreement-rules li > span,
.community-moderation {
  color: var(--ui-muted);
}

.community-moderation,
.band-challenge-hint {
  font-size: 0.8rem;
  line-height: 1.8;
}

.community-moderation summary,
.band-challenge-hint summary {
  cursor: pointer;
  color: var(--ui-text);
  width: fit-content;
}

.community-moderation ol {
  padding-left: 22px;
}

.community-moderation li {
  margin: 8px 0;
}

.community-agreement-consent {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding-top: 20px;
  margin-top: 18px;
  border-top: 1px solid var(--ui-line);
  color: var(--ui-text);
  font-size: 0.86rem;
  line-height: 1.6;
  cursor: pointer;
}

html body.auth-page-body .auth-form input[type='checkbox'] {
  appearance: auto;
  width: 18px;
  height: 18px;
  min-height: 18px;
  flex: 0 0 18px;
  margin: 2px 0 0;
  padding: 0;
  accent-color: var(--ui-action);
  cursor: pointer;
}

.band-challenge {
  box-sizing: border-box;
  width: min(620px, calc(100vw - 32px));
  max-width: none;
  max-height: calc(100dvh - 32px);
  padding: 28px;
  border: 1px solid var(--ui-line-strong);
  border-radius: 16px;
  color: var(--ui-text);
  background: var(--ui-surface);
  box-shadow: var(--ui-shadow);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.band-challenge::backdrop {
  background: rgb(8 14 18 / 64%);
  backdrop-filter: blur(5px);
}

body:has(.band-challenge[open]) {
  overflow: hidden;
}

.band-challenge h2 {
  margin: 18px 0 10px;
  font-size: clamp(1.25rem, 3.8vw, 1.6rem);
  line-height: 1.5;
  color: var(--ui-text);
}

#band-challenge-task {
  margin: 0 0 20px;
  font-size: 0.92rem;
  line-height: 1.7;
}

.band-challenge button {
  font: inherit;
  cursor: pointer;
}

.band-challenge-close {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--ui-line);
  border-radius: 50%;
  background: transparent;
  color: var(--ui-text);
  font-size: 1.4rem !important;
}

.band-challenge-plot {
  padding: 14px 12px 12px;
  margin-bottom: 16px;
  border: 1px solid var(--ui-line);
  border-radius: 10px;
  background: var(--ui-surface-soft);
}

#band-challenge-graph {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
  touch-action: none;
  cursor: grab;
}

#band-challenge-graph:active {
  cursor: grabbing;
}

.band-grid path {
  fill: none;
  stroke: var(--ui-line);
  stroke-dasharray: 3 6;
}

.band-axes {
  fill: none;
  stroke: var(--ui-muted);
}

.band-axis-label {
  fill: var(--ui-muted);
  font:
    13px ui-monospace,
    monospace;
}

.band-curve {
  fill: none;
  stroke: var(--ui-text);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.band-particle-guide {
  fill: none;
  stroke: var(--ui-muted);
  stroke-dasharray: 4 4;
}

.band-candidates circle {
  fill: var(--ui-surface);
  stroke: var(--ui-text);
  stroke-width: 2;
}

.band-candidates text {
  fill: var(--ui-muted);
  font:
    600 14px ui-monospace,
    monospace;
}

.band-particle-halo {
  fill: #dc6450;
  opacity: 0.15;
}

.band-particle-core {
  fill: #b84230;
  stroke: #fff;
  stroke-width: 2;
}

.band-particle.is-hole .band-particle-core {
  fill: #21697b;
}

.band-particle.is-hole .band-particle-halo {
  fill: #419eb3;
}

.band-particle text {
  fill: #fff;
  font:
    600 14px system-ui,
    sans-serif;
  user-select: none;
}

.band-position-heading {
  margin-top: 12px;
}

#band-challenge-position,
#wien-challenge-position {
  display: block;
  box-sizing: border-box;
  width: 100%;
  height: 28px;
  margin: 4px 0;
  padding: 0;
  accent-color: #b84230;
  cursor: ew-resize;
}

.band-challenge-controls,
.band-challenge-expiry {
  margin: 4px 0 0;
  color: var(--ui-muted);
  font-size: 0.73rem;
  line-height: 1.7;
}

.band-challenge-hint {
  color: var(--ui-muted);
}

.band-challenge-hint p {
  margin: 8px 0;
}

.band-challenge-status {
  min-height: 1.5em;
  margin: 14px 0;
  color: var(--ui-text);
  font-size: 0.83rem;
  line-height: 1.7;
}

.band-challenge-actions {
  display: flex;
  align-items: stretch;
  gap: 12px;
}

.band-challenge-actions button {
  min-height: 48px;
  padding: 10px 18px;
  border: 1px solid var(--ui-line-strong);
  border-radius: 8px;
  color: var(--ui-text);
  background: transparent;
  font-size: 0.87rem;
}

.band-challenge-actions .auth-submit {
  flex: 1;
  width: auto;
  margin: 0;
}

.band-challenge button:disabled,
#band-challenge-position:disabled,
#wien-challenge-position:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.band-challenge-expiry {
  text-align: right;
  margin-top: 10px;
}

.wien-challenge-legend {
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 4px 12px;
}

.band-challenge:has(#wien-challenge-plot:not([hidden])) h2 {
  margin: 10px 0 6px;
}

.band-challenge:has(#wien-challenge-plot:not([hidden])) #band-challenge-task {
  margin-bottom: 12px;
}

.band-challenge:has(#wien-challenge-plot:not([hidden])) .band-challenge-status {
  margin: 8px 0;
}

.wien-challenge-plot {
  margin-bottom: 10px;
}

#wien-challenge-graph {
  display: block;
  width: 100%;
  height: auto;
  max-height: 285px;
  margin-top: 10px;
  overflow: visible;
  touch-action: none;
}

.wien-wire {
  fill: none;
  stroke: var(--ui-text);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.wien-wire .wien-amplifier {
  fill: var(--ui-surface);
}

.wien-wire .wien-junction {
  fill: var(--ui-text);
  stroke: none;
}

.wien-wire .wien-rheostat-track {
  fill: var(--ui-surface);
  stroke: #b84230;
  stroke-width: 3;
}

.wien-circuit-label {
  fill: var(--ui-text);
  font:
    23px system-ui,
    sans-serif;
  user-select: none;
}

.wien-wiper {
  cursor: ew-resize;
}

.wien-wiper-halo {
  fill: #b84230;
  opacity: 0.14;
}

.wien-wiper-handle {
  fill: #b84230;
  stroke: var(--ui-surface);
  stroke-width: 2;
}

.wien-wiper-arrow {
  fill: none;
  stroke: #b84230;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.wien-wiper-grip {
  fill: none;
  stroke: #fff;
  stroke-width: 1.5;
}

.wien-challenge-plot .band-position-heading {
  flex-wrap: wrap;
  gap: 4px 12px;
  margin-top: 8px;
}

#wien-challenge-position-value {
  color: var(--ui-text);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.wien-transient {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--ui-line);
}

#wien-challenge-waveform {
  display: block;
  width: 100%;
  height: auto;
  max-height: 135px;
}

.wien-wave-grid {
  fill: none;
  stroke: var(--ui-line);
  stroke-dasharray: 3 6;
}

.wien-wave-axes {
  fill: none;
  stroke: var(--ui-muted);
}

.wien-wave-label {
  fill: var(--ui-muted);
  font:
    20px ui-monospace,
    monospace;
}

.wien-wave-curve {
  fill: none;
  stroke: var(--ui-text);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (max-width: 600px) {
  .community-agreement-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .community-agreement-rules li {
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 2px 8px;
  }

  .community-agreement-rules li > span {
    grid-column: 2;
  }

  .band-challenge {
    width: calc(100vw - 20px);
    max-height: calc(100dvh - 20px);
    padding: 18px;
  }

  .band-challenge-plot {
    padding: 12px 8px;
  }

  .band-challenge-legend {
    font-size: 0.68rem;
  }

  .band-candidates text {
    font-size: 24px;
  }

  .band-axis-label {
    font-size: 20px;
  }

  .band-candidates circle {
    r: 7px;
  }

  .band-particle-core {
    r: 21px;
  }

  .band-particle-halo {
    r: 30px;
  }

  .band-particle text {
    font-size: 20px;
  }

  .band-challenge-actions {
    gap: 8px;
  }

  .band-challenge-actions button {
    padding: 10px 12px;
    font-size: 0.8rem;
  }
}