/**
 * NutriCalc shared UI components.
 *
 * Add .nc-ui to a page or section and use only nc-* component classes.
 * The prefixed contract prevents the Phase 3 foundation from redesigning legacy templates.
 */

.nc-ui {
  min-width: 0;
  color: var(--nc-color-text);
  background: var(--nc-color-canvas);
  font-family: var(--nc-font-sans);
  font-size: var(--nc-font-size-md);
  line-height: var(--nc-line-height-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.nc-ui *,
.nc-ui *::before,
.nc-ui *::after {
  box-sizing: border-box;
}

.nc-ui :where(h1, h2, h3, h4, p) {
  margin-block-start: 0;
}

.nc-ui :where(h1, h2, h3, h4) {
  color: var(--nc-color-text);
  font-weight: var(--nc-font-weight-bold);
  line-height: var(--nc-line-height-tight);
}

.nc-ui :where(p, li) {
  max-width: var(--nc-size-reading);
}

.nc-ui :where(a) {
  color: var(--nc-color-accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.nc-ui :where(a:hover) {
  color: var(--nc-color-accent-hover);
}

.nc-ui :where(button, input, select, textarea) {
  font: inherit;
}

.nc-ui :where(button, [href], input, select, textarea, [tabindex]):focus-visible {
  outline: var(--nc-focus-width) solid var(--nc-color-focus);
  outline-offset: var(--nc-focus-offset);
}

.nc-ui :where([hidden]) {
  display: none !important;
}

.nc-container {
  width: min(100% - (2 * var(--nc-space-4)), var(--nc-size-content));
  margin-inline: auto;
}

.nc-stack {
  display: flex;
  flex-direction: column;
  gap: var(--nc-stack-gap, var(--nc-space-6));
}

.nc-cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--nc-cluster-gap, var(--nc-space-3));
}

.nc-surface {
  border: var(--nc-border-width) solid var(--nc-color-border);
  border-radius: var(--nc-radius-surface);
  background: var(--nc-color-surface);
  box-shadow: var(--nc-shadow-surface);
}

.nc-visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Forms */

.nc-form {
  display: grid;
  gap: var(--nc-space-6);
}

.nc-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--nc-space-5);
}

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

.nc-field--full {
  grid-column: 1 / -1;
}

.nc-label,
.nc-legend {
  color: var(--nc-color-text);
  font-size: var(--nc-font-size-sm);
  font-weight: var(--nc-font-weight-medium);
  line-height: 1.4;
}

.nc-required {
  color: var(--nc-color-danger);
}

.nc-hint,
.nc-field-error {
  margin: 0;
  font-size: var(--nc-font-size-sm);
  line-height: 1.45;
}

.nc-hint {
  color: var(--nc-color-text-muted);
}

.nc-field-error {
  color: var(--nc-color-danger);
  font-weight: var(--nc-font-weight-medium);
}

.nc-input,
.nc-select,
.nc-textarea,
.nc-ui .nc-field :where(input:not([type="checkbox"]):not([type="radio"]), select, textarea) {
  width: 100%;
  min-height: var(--nc-size-control);
  margin: 0;
  padding: var(--nc-space-3) var(--nc-space-4);
  color: var(--nc-color-text);
  border: var(--nc-border-width) solid var(--nc-color-border-strong);
  border-radius: var(--nc-radius-control);
  background: var(--nc-color-surface);
  box-shadow: 0 1px 2px rgb(23 32 51 / 0.05);
  transition:
    border-color var(--nc-duration-fast) var(--nc-ease-standard),
    box-shadow var(--nc-duration-fast) var(--nc-ease-standard),
    background-color var(--nc-duration-fast) var(--nc-ease-standard);
}

.nc-input::placeholder,
.nc-textarea::placeholder,
.nc-ui .nc-field :where(input, textarea)::placeholder {
  color: var(--nc-color-text-muted);
  opacity: 1;
}

.nc-input:hover,
.nc-select:hover,
.nc-textarea:hover,
.nc-ui .nc-field :where(input, select, textarea):hover {
  border-color: var(--nc-color-text-muted);
}

.nc-input:focus,
.nc-select:focus,
.nc-textarea:focus,
.nc-ui .nc-field :where(input, select, textarea):focus {
  outline: none;
  border-color: var(--nc-color-accent);
  background: var(--nc-color-surface);
  box-shadow: 0 0 0 3px rgb(11 99 206 / 0.16);
}

.nc-input[aria-invalid="true"],
.nc-select[aria-invalid="true"],
.nc-textarea[aria-invalid="true"],
.nc-ui .nc-field :where(input, select, textarea)[aria-invalid="true"] {
  border-color: var(--nc-color-danger);
}

.nc-input:disabled,
.nc-select:disabled,
.nc-textarea:disabled,
.nc-ui .nc-field :where(input, select, textarea):disabled {
  color: var(--nc-color-text-muted);
  border-color: var(--nc-color-border);
  background: var(--nc-color-surface-subtle);
  cursor: not-allowed;
  opacity: 1;
}

.nc-choice-group {
  display: grid;
  gap: var(--nc-space-3);
  padding: 0;
  border: 0;
}

.nc-choice {
  display: inline-flex;
  align-items: flex-start;
  gap: var(--nc-space-3);
  min-height: var(--nc-size-control);
  padding: var(--nc-space-2) 0;
  color: var(--nc-color-text);
  cursor: pointer;
}

.nc-choice :where(input[type="checkbox"], input[type="radio"]) {
  flex: 0 0 auto;
  width: 1.25rem;
  height: 1.25rem;
  margin: 0.12rem 0 0;
  accent-color: var(--nc-color-accent);
}

/* Buttons */

.nc-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--nc-space-2);
  min-height: var(--nc-size-control);
  max-width: 100%;
  padding: var(--nc-space-3) var(--nc-space-5);
  color: var(--nc-color-text-inverse);
  border: var(--nc-border-width) solid var(--nc-color-accent);
  border-radius: var(--nc-radius-control);
  background: var(--nc-color-accent);
  box-shadow: none;
  font-size: var(--nc-font-size-md);
  font-weight: var(--nc-font-weight-bold);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--nc-duration-fast) var(--nc-ease-standard),
    border-color var(--nc-duration-fast) var(--nc-ease-standard),
    color var(--nc-duration-fast) var(--nc-ease-standard),
    transform var(--nc-duration-fast) var(--nc-ease-standard);
}

.nc-button:hover {
  color: var(--nc-color-text-inverse);
  border-color: var(--nc-color-accent-hover);
  background: var(--nc-color-accent-hover);
  text-decoration: none;
}

.nc-button:active {
  border-color: var(--nc-color-accent-active);
  background: var(--nc-color-accent-active);
  transform: translateY(1px);
}

.nc-button--secondary {
  color: var(--nc-color-accent);
  border-color: var(--nc-color-border-strong);
  background: var(--nc-color-surface);
}

.nc-button--secondary:hover {
  color: var(--nc-color-accent-hover);
  border-color: var(--nc-color-accent);
  background: var(--nc-color-accent-soft);
}

.nc-button--quiet {
  color: var(--nc-color-accent);
  border-color: transparent;
  background: transparent;
}

.nc-button--quiet:hover {
  color: var(--nc-color-accent-hover);
  border-color: transparent;
  background: var(--nc-color-accent-soft);
}

.nc-button:disabled,
.nc-button[aria-disabled="true"] {
  color: var(--nc-color-text-muted);
  border-color: var(--nc-color-border);
  background: var(--nc-color-surface-subtle);
  cursor: not-allowed;
  transform: none;
}

.nc-button--block {
  width: 100%;
}

/* Alerts and validation summaries */

.nc-alert {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--nc-space-4);
  padding: var(--nc-space-4);
  color: var(--nc-color-text);
  border: var(--nc-border-width) solid var(--nc-color-border);
  border-inline-start-width: 0.25rem;
  border-radius: var(--nc-radius-control);
  background: var(--nc-color-surface-subtle);
}

.nc-alert__content {
  display: grid;
  gap: var(--nc-space-1);
}

.nc-alert__title,
.nc-alert__message {
  margin: 0;
}

.nc-alert__title {
  font-weight: var(--nc-font-weight-bold);
}

.nc-alert--info {
  border-color: var(--nc-color-info);
  background: var(--nc-color-info-soft);
}

.nc-alert--success {
  border-color: var(--nc-color-success);
  background: var(--nc-color-success-soft);
}

.nc-alert--warning {
  border-color: var(--nc-color-warning);
  background: var(--nc-color-warning-soft);
}

.nc-alert--danger {
  border-color: var(--nc-color-danger);
  background: var(--nc-color-danger-soft);
}

.nc-alert__dismiss {
  align-self: start;
  min-width: var(--nc-size-control);
  min-height: var(--nc-size-control);
  padding: var(--nc-space-2);
  color: var(--nc-color-text);
  border: 0;
  border-radius: var(--nc-radius-control);
  background: transparent;
  cursor: pointer;
}

.nc-alert__dismiss:hover {
  background: rgb(23 32 51 / 0.08);
}

/* Result cards, loading and empty states */

.nc-results {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--nc-space-4);
}

.nc-result-card {
  display: grid;
  align-content: start;
  gap: var(--nc-space-3);
  min-width: 0;
  padding: var(--nc-space-6);
  border: var(--nc-border-width) solid var(--nc-color-border);
  border-radius: var(--nc-radius-surface);
  background: var(--nc-color-surface);
}

.nc-result-card__label,
.nc-result-card__value,
.nc-result-card__meta {
  margin: 0;
}

.nc-result-card__label {
  color: var(--nc-color-text-muted);
  font-size: var(--nc-font-size-sm);
  font-weight: var(--nc-font-weight-medium);
}

.nc-result-card__value {
  color: var(--nc-color-text);
  font-size: var(--nc-font-size-2xl);
  font-variant-numeric: tabular-nums;
  font-weight: var(--nc-font-weight-bold);
  line-height: var(--nc-line-height-tight);
}

.nc-result-card__meta {
  color: var(--nc-color-text-muted);
  font-size: var(--nc-font-size-sm);
}

.nc-empty-state {
  display: grid;
  justify-items: start;
  gap: var(--nc-space-3);
  padding: var(--nc-space-8);
  border: var(--nc-border-width) dashed var(--nc-color-border-strong);
  border-radius: var(--nc-radius-surface);
  background: var(--nc-color-surface);
}

.nc-empty-state :where(h2, h3, p) {
  margin-block-end: 0;
}

.nc-skeleton {
  min-height: 1em;
  border-radius: var(--nc-radius-control);
  background: var(--nc-color-surface-strong);
}

@media (prefers-reduced-motion: no-preference) {
  .nc-skeleton {
    background-image: linear-gradient(
      90deg,
      transparent,
      rgb(255 255 255 / 0.52),
      transparent
    );
    background-size: 200% 100%;
    animation: nc-skeleton-shift 1.4s ease-in-out infinite;
  }
}

@keyframes nc-skeleton-shift {
  to {
    background-position-x: -200%;
  }
}

/* Navigation */

.nc-nav {
  position: relative;
  z-index: var(--nc-layer-sticky);
  min-height: 4rem;
  border-bottom: var(--nc-border-width) solid var(--nc-color-border);
  background: var(--nc-color-surface);
}

.nc-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--nc-space-4);
  min-height: 4rem;
}

.nc-nav__brand {
  min-width: 0;
  color: var(--nc-color-text);
  font-weight: var(--nc-font-weight-bold);
  line-height: 1.25;
  text-decoration: none;
}

.nc-nav__brand:hover {
  color: var(--nc-color-accent);
  text-decoration: none;
}

.nc-nav__links {
  display: flex;
  align-items: center;
  gap: var(--nc-space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nc-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: var(--nc-size-control);
  padding: var(--nc-space-2) var(--nc-space-3);
  color: var(--nc-color-text);
  border-radius: var(--nc-radius-control);
  font-weight: var(--nc-font-weight-medium);
  text-decoration: none;
  white-space: nowrap;
}

.nc-nav__link:hover,
.nc-nav__link[aria-current="page"] {
  color: var(--nc-color-accent-hover);
  background: var(--nc-color-accent-soft);
  text-decoration: none;
}

.nc-nav__toggle {
  display: none;
}

/* Tables */

.nc-table-wrap {
  max-width: 100%;
  overflow-x: auto;
  border: var(--nc-border-width) solid var(--nc-color-border);
  border-radius: var(--nc-radius-surface);
  background: var(--nc-color-surface);
  -webkit-overflow-scrolling: touch;
}

.nc-table {
  width: 100%;
  min-width: 38rem;
  margin: 0;
  border: 0;
  border-collapse: collapse;
  border-spacing: 0;
  background: transparent;
  box-shadow: none;
}

.nc-table :where(caption) {
  padding: var(--nc-space-4);
  color: var(--nc-color-text);
  font-weight: var(--nc-font-weight-bold);
  text-align: start;
}

.nc-table :where(th, td) {
  padding: var(--nc-space-3) var(--nc-space-4);
  color: var(--nc-color-text);
  border: 0;
  border-bottom: var(--nc-border-width) solid var(--nc-color-border);
  text-align: start;
  vertical-align: top;
}

.nc-table :where(th) {
  background: var(--nc-color-surface-subtle);
  font-size: var(--nc-font-size-sm);
  font-weight: var(--nc-font-weight-bold);
}

.nc-table tbody tr:last-child td {
  border-bottom: 0;
}

.nc-table tbody tr:hover {
  background: var(--nc-color-surface-subtle);
}

@media (max-width: 47.99rem) {
  .nc-container {
    width: min(100% - (2 * var(--nc-space-4)), var(--nc-size-content));
  }

  .nc-form-grid,
  .nc-results {
    grid-template-columns: minmax(0, 1fr);
  }

  .nc-button {
    white-space: normal;
  }

  .nc-nav__toggle {
    display: inline-flex;
  }

  .nc-nav__panel {
    position: absolute;
    inset: 100% 0 auto;
    padding: var(--nc-space-4);
    border-bottom: var(--nc-border-width) solid var(--nc-color-border);
    background: var(--nc-color-surface);
    box-shadow: var(--nc-shadow-raised);
  }

  .nc-nav__links {
    align-items: stretch;
    flex-direction: column;
  }

  .nc-nav__link {
    width: 100%;
  }

  .nc-alert {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (forced-colors: active) {
  .nc-button,
  .nc-input,
  .nc-select,
  .nc-textarea,
  .nc-alert,
  .nc-result-card,
  .nc-empty-state,
  .nc-table-wrap {
    border-color: CanvasText;
  }

  .nc-button:focus-visible,
  .nc-ui :where(button, [href], input, select, textarea, [tabindex]):focus-visible {
    outline-color: Highlight;
  }
}

@media print {
  .nc-ui {
    color: #172033;
    background: #ffffff;
  }

  .nc-nav,
  .nc-button,
  .nc-alert__dismiss {
    display: none !important;
  }

  .nc-result-card,
  .nc-table-wrap {
    break-inside: avoid;
    box-shadow: none;
  }
}