main.css

#app {
  min-height: 100vh;
}

.page-shell {
  --footer-nav-reserve: calc(5.25rem + env(safe-area-inset-bottom, 0px));

  min-height: 100vh;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
}

.page-main {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: var(--layout-page-max-width);
  margin: 0 auto;

  --layout-shell-padding-bottom: calc(var(--space-5) + var(--footer-nav-reserve));
}

.workspace-shell,
.form-shell,
.field-stack,
.token-gate,
.token-dialog,
.workspace-hero,
.utility-strip,
.utility-strip__items,
.app-footer__inner,
.field-block {
  display: grid;
}

.workspace-shell {
  width: 100%;
  max-width: var(--layout-rail-shell);
  margin: 0 auto;
  gap: var(--section-gap);
}

.workspace-shell--centered,
.workspace-hero,
.utility-strip,
.app-footer__inner {
  justify-items: center;
}

.workspace-content {
  width: 100%;
  display: grid;
  gap: var(--space-4);
  align-content: center;
  min-height: clamp(20rem, 52vh, 36rem);
}

.workspace-hero {
  gap: var(--space-1);
  text-align: center;
}

.workspace-shell--loading {
  max-width: 32rem;
  padding-top: var(--space-7);
}

.form-shell--minimal,
.result-shell {
  width: 100%;
  margin: 0 auto;
  padding: clamp(var(--space-4), 4vw, var(--space-5));
}

.form-shell--minimal {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.result-shell {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  gap: var(--section-gap);
}

.form-shell--minimal,
.result-shell,
.field-stack,
.token-gate {
  gap: var(--space-4);
}

.token-dialog {
  width: min(100%, var(--layout-field-max-width));
  max-width: var(--layout-field-max-width);
  padding: 0;
  border: 0;
  background: transparent;
}

.token-dialog::backdrop {
  background: var(--overlay-scrim);
}

.dominant-field {
  position: relative;
  align-items: center;
  min-width: 0;
}

.form-shell--minimal .dominant-field {
  width: 100%;
  max-width: 52rem;
  margin: 0 auto;
}

.result-shell .dominant-field {
  --control-input-lg-min-height: 4rem;
  --control-input-lg-padding-inline: 1.25rem 5rem;
  --control-input-lg-font-size: clamp(1rem, 1.8vw, 1.22rem);
  --control-input-lg-letter-spacing: var(--letter-spacing-title);
  --dominant-field-action-top: var(--space-2);
  --dominant-field-action-right: var(--space-2);
  --dominant-field-action-text-min-width: 4rem;
  --dominant-field-action-text-padding-inline: var(--space-3);
  --dominant-field-action-soft-bg: var(--surface-base);
  --dominant-field-action-soft-hover-bg: var(--border-subtle);
}

.field-block {
  gap: var(--space-2);
  min-width: 0;
}

.field-block--centered {
  justify-items: center;
}

.field-block--compact {
  gap: var(--space-2);
}

.field-block--stretch {
  justify-items: stretch;
}

.result-shell .field-block--centered {
  justify-items: start;
}

.field-error {
  color: var(--danger);
  font-size: var(--font-size-00);
  text-align: center;
}

.field-error:empty {
  display: none;
}

.field-help,
.result-meta {
  margin: 0;
  color: var(--text-muted);
  text-align: center;
  font-size: var(--font-size-0);
  line-height: var(--line-height-base);
}

.field-help--alert {
  color: var(--danger);
}

.field-help--warning {
  color: var(--text-body);
}

.catalog-hit-list {
  width: 100%;
  max-width: var(--layout-rail-reading);
  margin: 0 auto;
  text-align: start;
}

.catalog-hit {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border: var(--border-width) solid transparent;
  border-radius: var(--radius-md);
  color: inherit;
  text-decoration: none;
}

.catalog-hit:hover,
.catalog-hit:focus-visible,
.catalog-hit[data-active] {
  text-decoration: none;
  background: var(--surface-base);
}

.catalog-hit:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-color: var(--border-strong);
}

.catalog-hit[data-active] {
  background: var(--surface-elevated);
  border-color: var(--border-strong);
}

.catalog-hit__excerpt {
  color: var(--text-muted);
  font-size: var(--font-size-00);
}

.dominant-field__action {
  position: absolute;
  right: var(--dominant-field-action-right, var(--space-3));
  top: var(--dominant-field-action-top, var(--space-3));
  width: var(--dominant-field-action-size, 3rem);
  height: var(--dominant-field-action-size, 3rem);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--dominant-field-action-bg, var(--surface-elevated));
  color: var(--text-strong);
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast),
    opacity var(--transition-fast);
}

.dominant-field__action--text {
  width: auto;
  min-width: var(--dominant-field-action-text-min-width, 4rem);
  padding: 0 var(--dominant-field-action-text-padding-inline, var(--space-3));
  font-size: var(--font-size-00);
  letter-spacing: var(--letter-spacing-meta);
  text-transform: uppercase;
}

.dominant-field__action--soft {
  background: var(--dominant-field-action-soft-bg, var(--surface-base));
  color: var(--text-muted);
}

.dominant-field__action:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.dominant-field__action:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.dominant-field__action:hover:not(:disabled) {
  transform: translateX(var(--motion-nudge));
  background: var(--border-subtle);
}

.dominant-field__action--soft:hover:not(:disabled) {
  background: var(--dominant-field-action-soft-hover-bg, var(--border-subtle));
  color: var(--text-strong);
}

.notice {
  display: grid;
  gap: var(--space-2);
  width: 100%;
  max-width: var(--layout-field-max-width);
  margin: 0 auto;
}

.notice.layout-rail-reading {
  max-width: var(--layout-rail-reading);
}

.notice__content {
  flex: 1;
  min-width: 0;
}

.notice__code {
  display: inline-block;
  margin-top: var(--space-2);
  padding: var(--space-1) var(--space-2);
  background: rgb(var(--color-rgb-white) / 6%);
  border: var(--border-width) solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-00);
  user-select: all;
  cursor: pointer;
  color: var(--text-strong);
  width: fit-content;
}

.notice__title {
  color: var(--text-strong);
  font-weight: var(--font-weight-semibold);
}

.notice__intro,
.notice__meta {
  color: var(--text-muted);
}

.notice[data-tone="error"] {
  border-color: var(--border-danger);
  background: var(--bg-danger);
}

.notice[data-tone="success"] {
  border-color: var(--border-success);
  background: var(--bg-success);
}

.notice[data-state="loading"] {
  justify-items: center;
  text-align: center;
}

.token-gate {
  width: 100%;
  max-width: var(--layout-field-max-width);
  margin: 0 auto;
  gap: var(--space-3);
}

.token-dialog .token-gate {
  background: linear-gradient(180deg, var(--overlay-top-light), transparent), var(--canvas);
}

.token-gate__copy {
  display: grid;
  gap: var(--space-1);
  justify-items: start;
  text-align: left;
}

.token-gate__actions {
  display: grid;
  gap: var(--space-3);
  justify-items: end;
}

.token-gate__back {
  justify-self: start;
}

.token-gate__nudge {
  color: var(--text-muted);
  font-size: var(--font-size-0);
  line-height: var(--line-height-base);
}

.token-gate__nudge-link {
  text-decoration: none;
  color: var(--eyebrow-color);
}

.token-gate__nudge-link:hover,
.token-gate__nudge-link:focus-visible {
  color: var(--text-body);
  text-decoration: underline;
  text-underline-offset: 0.16em;
}

.field-block--stretch .field-error {
  text-align: left;
}

.result-header {
  text-align: left;
  justify-items: start;
  padding-top: var(--space-2);
}

.preview-feedback {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-0);
  color: var(--text-muted);
  line-height: var(--line-height-base);
  padding: var(--space-2) 0;
}

.preview-feedback--error {
  color: var(--text-soft);
}

.preview-feedback__spinner {
  width: 0.85rem;
  height: 0.85rem;
  border: var(--border-width) solid var(--border-muted);
  border-top-color: var(--text-strong);
  border-radius: var(--radius-pill);
  animation: spin 0.9s linear infinite;
}

.notice[data-state="loading"] p {
  color: var(--text-muted);
}

.notice__actions {
  margin-top: var(--space-3);
}

.notice__spinner {
  width: 1rem;
  height: 1rem;
  border: var(--border-width) solid var(--border-muted);
  border-top-color: var(--accent);
  border-radius: var(--radius-pill);
  animation: spin 0.9s linear infinite;
}

.utility-strip {
  width: 100%;
  max-width: var(--layout-page-max-width);
}

.utility-strip__items {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

.utility-link,
.utility-button {
  border: 0;
  background: transparent;
  color: var(--text-muted);
  padding: 0;
  font-size: var(--font-size-00);
  cursor: pointer;
}

.utility-link:focus-visible,
.utility-button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-color: var(--border-strong);
}

.utility-link:hover,
.utility-button:hover {
  color: var(--text-strong);
}

.utility-button--toggle {
  letter-spacing: var(--eyebrow-letter-spacing);
  text-transform: uppercase;
}

.app-footer {
  position: fixed;
  inset-inline: 0;
  bottom: 0;
  z-index: 20;
  display: grid;
  justify-items: center;
  padding: var(--space-2) var(--space-3) calc(var(--space-2) + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(180deg, transparent 0%, rgb(var(--color-rgb-black) / 68%) 56%);
  backdrop-filter: blur(4px);
}

.app-footer__inner {
  width: 100%;
  max-width: var(--layout-page-max-width);
}

@media (width < 48rem) {
  .page-shell {
    --footer-nav-reserve: 0px;
  }

  .page-main,
  .workspace-shell {
    width: 100%;
    max-width: 100%;
    margin-inline: 0;
  }

  .workspace-shell {
    gap: var(--space-4);
  }

  .workspace-content {
    min-height: clamp(16rem, 42vh, 26rem);
  }

  .form-shell--minimal {
    padding: var(--space-4);
    border-radius: var(--radius-md);
  }

  .result-shell {
    padding: 0;
    border-radius: 0;
  }

  .form-shell--minimal .dominant-field,
  .result-shell .dominant-field {
    --control-input-lg-min-height: 4rem;
  }

  .layout-section-divided,
  .form-shell--minimal .dominant-field,
  .result-shell .dominant-field {
    width: 100%;
  }

  .token-gate__actions {
    justify-items: stretch;
  }

  .dominant-field__action {
    top: var(--space-2);
    right: var(--space-2);
    width: 3rem;
    height: 3rem;
  }

  .dominant-field__action--text {
    min-width: 4rem;
    padding-inline: var(--space-3);
  }

  .app-footer {
    position: static;
    inset-inline: auto;
    bottom: auto;
    z-index: auto;
    margin-top: auto;
    padding: var(--space-5) var(--space-3) calc(var(--space-3) + env(safe-area-inset-bottom, 0px));
    border-top: var(--border-width) solid var(--border-subtle);
    background: transparent;
    backdrop-filter: none;
  }

  .utility-link,
  .utility-button {
    color: var(--text-faint);
    font-size: var(--font-size-00);
    opacity: 0.92;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}