/* ============================================================================
   GymDiet Master — UI Kit (Phase 1.2)
   Token-driven primitives: .gd-btn, .gd-card, .gd-input, .gd-chip, .gd-badge,
   .gd-skeleton. New screens should adopt these; legacy components keep their
   own styles until migrated in later phases.
   Depends on tokens.css.
   ============================================================================ */

/* ----------------------------------------------------------------------------
   Button
   Variants:  .gd-btn--primary | --accent | --ghost | --danger | --link
   Sizes:     .gd-btn--sm | --md (default) | --lg | --block (full width)
---------------------------------------------------------------------------- */
.gd-btn {
  appearance: none;
  -webkit-tap-highlight-color: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--gd-space-2);
  min-height: var(--gd-tap-min);
  padding: 0 var(--gd-space-5);
  border: 1px solid transparent;
  border-radius: var(--gd-radius-md);
  background: var(--gd-surface);
  color: var(--gd-text);
  font-family: var(--gd-font-sans);
  font-size: var(--gd-text-md);
  font-weight: var(--gd-weight-semibold);
  line-height: var(--gd-leading-tight);
  letter-spacing: 0;
  cursor: pointer;
  user-select: none;
  text-decoration: none;
  transition:
    background var(--gd-duration-fast) var(--gd-ease-standard),
    border-color var(--gd-duration-fast) var(--gd-ease-standard),
    color var(--gd-duration-fast) var(--gd-ease-standard),
    box-shadow var(--gd-duration-fast) var(--gd-ease-standard),
    transform var(--gd-duration-fast) var(--gd-ease-standard);
}

.gd-btn:focus-visible {
  outline: none;
  box-shadow: var(--gd-shadow-focus);
}

.gd-btn:disabled,
.gd-btn[aria-disabled='true'] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.gd-btn:active:not(:disabled) {
  transform: translateY(1px);
}

/* Variants */
.gd-btn--primary {
  background: var(--gd-brand-primary);
  color: var(--gd-text-on-brand);
  border-color: transparent;
  box-shadow: var(--gd-shadow-2);
}
.gd-btn--primary:hover:not(:disabled) {
  background: var(--gd-brand-primary-hover);
  box-shadow: var(--gd-shadow-3);
}
.gd-btn--primary:active:not(:disabled) {
  background: var(--gd-brand-primary-pressed);
}

.gd-btn--accent {
  background: var(--gd-brand-accent);
  color: var(--gd-text-on-accent);
  border-color: transparent;
  box-shadow: var(--gd-shadow-2);
}
.gd-btn--accent:hover:not(:disabled) {
  background: var(--gd-brand-accent-hover);
  box-shadow: var(--gd-shadow-3);
}

.gd-btn--ghost {
  background: transparent;
  border-color: var(--gd-border);
  color: var(--gd-text);
}
.gd-btn--ghost:hover:not(:disabled) {
  background: var(--gd-brand-primary-soft);
  border-color: var(--gd-brand-primary);
  color: var(--gd-brand-primary);
}

.gd-btn--danger {
  background: var(--gd-danger);
  color: #ffffff;
  border-color: transparent;
}
.gd-btn--danger:hover:not(:disabled) {
  filter: brightness(1.05);
}

.gd-btn--link {
  background: transparent;
  border-color: transparent;
  color: var(--gd-brand-primary);
  padding-left: var(--gd-space-1);
  padding-right: var(--gd-space-1);
  min-height: auto;
}
.gd-btn--link:hover:not(:disabled) {
  color: var(--gd-brand-primary-hover);
  text-decoration: underline;
}

/* Sizes */
.gd-btn--sm {
  min-height: 36px;
  padding: 0 var(--gd-space-3);
  font-size: var(--gd-text-sm);
  border-radius: var(--gd-radius-sm);
}
.gd-btn--lg {
  min-height: 52px;
  padding: 0 var(--gd-space-6);
  font-size: var(--gd-text-lg);
  border-radius: var(--gd-radius-lg);
}
.gd-btn--block {
  width: 100%;
}

/* Loading state — replaces text with spinner */
.gd-btn[aria-busy='true'] {
  position: relative;
  color: transparent !important;
}
.gd-btn[aria-busy='true']::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-top-color: transparent;
  color: var(--gd-text-on-brand);
  animation: gd-spin 0.7s linear infinite;
}

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

/* ----------------------------------------------------------------------------
   Card
---------------------------------------------------------------------------- */
.gd-card {
  background: var(--gd-surface);
  border: 1px solid var(--gd-border-subtle);
  border-radius: var(--gd-radius-lg);
  padding: var(--gd-space-5);
  box-shadow: var(--gd-shadow-2);
}

.gd-card--flat {
  box-shadow: none;
}

.gd-card--raised {
  box-shadow: var(--gd-shadow-3);
}

.gd-card--interactive {
  cursor: pointer;
  transition:
    transform var(--gd-duration-fast) var(--gd-ease-standard),
    box-shadow var(--gd-duration-fast) var(--gd-ease-standard);
}
.gd-card--interactive:hover {
  transform: translateY(-2px);
  box-shadow: var(--gd-shadow-3);
}

.gd-card__title {
  margin: 0 0 var(--gd-space-2);
  font-size: var(--gd-text-lg);
  font-weight: var(--gd-weight-semibold);
  color: var(--gd-text);
  line-height: var(--gd-leading-snug);
}

.gd-card__subtitle {
  margin: 0;
  font-size: var(--gd-text-sm);
  color: var(--gd-text-muted);
}

/* ----------------------------------------------------------------------------
   Accessibility utility
---------------------------------------------------------------------------- */
.gd-sr-only {
  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;
}

/* ----------------------------------------------------------------------------
   Dashboard components
---------------------------------------------------------------------------- */
.gd-calorie-ring-shell {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gd-macro-progress-list {
  display: flex;
  flex-direction: column;
  gap: var(--gd-space-3);
  list-style: none;
  margin: 0;
  padding: 0;
}

.gd-macro-progress-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: var(--gd-space-4);
  align-items: center;
  padding: var(--gd-space-4) 0;
  position: relative;
}

.gd-macro-progress-row + .gd-macro-progress-row {
  border-top: 1px solid var(--gd-dashboard-macro-separator);
}

.gd-macro-progress-icon {
  width: 48px;
  height: 48px;
  border-radius: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 10px 22px rgba(15, 23, 42, 0.14);
}

.gd-macro-progress-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.gd-macro-progress-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--gd-space-3);
}

.gd-macro-progress-title {
  min-width: 0;
}

.gd-macro-progress-value {
  white-space: nowrap;
  text-align: right;
}

.gd-macro-progress-track {
  width: 100%;
}

.gd-advice-card {
  width: 100%;
}

/* ----------------------------------------------------------------------------
   Input
---------------------------------------------------------------------------- */
.gd-input {
  appearance: none;
  -webkit-appearance: none;
  display: block;
  width: 100%;
  min-height: var(--gd-tap-min);
  padding: var(--gd-space-3) var(--gd-space-4);
  border: 1px solid var(--gd-border);
  border-radius: var(--gd-radius-md);
  background: var(--gd-surface);
  color: var(--gd-text);
  font-family: var(--gd-font-sans);
  font-size: var(--gd-text-md);
  line-height: var(--gd-leading-snug);
  transition:
    border-color var(--gd-duration-fast) var(--gd-ease-standard),
    box-shadow var(--gd-duration-fast) var(--gd-ease-standard);
}

.gd-input::placeholder {
  color: var(--gd-text-subtle);
}

.gd-input:focus-visible {
  outline: none;
  border-color: var(--gd-brand-primary);
  box-shadow: var(--gd-shadow-focus);
}

.gd-input[aria-invalid='true'] {
  border-color: var(--gd-danger);
}
.gd-input[aria-invalid='true']:focus-visible {
  box-shadow: 0 0 0 3px var(--gd-danger-bg);
}

.gd-input:disabled {
  background: var(--gd-surface-2);
  color: var(--gd-text-subtle);
  cursor: not-allowed;
}

.gd-field {
  display: flex;
  flex-direction: column;
  gap: var(--gd-space-1);
}
.gd-field__label {
  font-size: var(--gd-text-sm);
  font-weight: var(--gd-weight-medium);
  color: var(--gd-text-muted);
}
.gd-field__hint {
  font-size: var(--gd-text-xs);
  color: var(--gd-text-subtle);
}
.gd-field__error {
  font-size: var(--gd-text-xs);
  color: var(--gd-danger);
}

/* ----------------------------------------------------------------------------
   Chip / Pill — for filters, tags, statuses
---------------------------------------------------------------------------- */
.gd-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--gd-space-1);
  padding: var(--gd-space-1) var(--gd-space-3);
  border: 1px solid var(--gd-border);
  border-radius: var(--gd-radius-full);
  background: var(--gd-surface);
  color: var(--gd-text-muted);
  font-size: var(--gd-text-xs);
  font-weight: var(--gd-weight-medium);
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background var(--gd-duration-fast) var(--gd-ease-standard),
    border-color var(--gd-duration-fast) var(--gd-ease-standard),
    color var(--gd-duration-fast) var(--gd-ease-standard);
}
.gd-chip:hover {
  border-color: var(--gd-brand-primary);
  color: var(--gd-brand-primary);
}
.gd-chip[aria-pressed='true'],
.gd-chip.is-active {
  background: var(--gd-brand-primary-soft);
  border-color: var(--gd-brand-primary);
  color: var(--gd-brand-primary);
}

/* ----------------------------------------------------------------------------
   Badge — non-interactive status marker
---------------------------------------------------------------------------- */
.gd-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--gd-space-1);
  padding: 2px var(--gd-space-2);
  border-radius: var(--gd-radius-sm);
  font-size: var(--gd-text-2xs);
  font-weight: var(--gd-weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--gd-brand-primary-soft);
  color: var(--gd-brand-primary);
}
.gd-badge--success { background: var(--gd-success-bg); color: var(--gd-success); }
.gd-badge--warning { background: var(--gd-warning-bg); color: var(--gd-warning); }
.gd-badge--danger  { background: var(--gd-danger-bg);  color: var(--gd-danger); }
.gd-badge--info    { background: var(--gd-info-bg);    color: var(--gd-info); }

/* ----------------------------------------------------------------------------
   Skeleton — loading placeholder
---------------------------------------------------------------------------- */
.gd-skeleton {
  display: block;
  background: linear-gradient(
    90deg,
    var(--gd-surface-2) 0%,
    var(--gd-border-subtle) 50%,
    var(--gd-surface-2) 100%
  );
  background-size: 200% 100%;
  border-radius: var(--gd-radius-sm);
  animation: gd-skeleton-pulse 1.4s ease-in-out infinite;
}
.gd-skeleton--text  { height: 0.9em; margin: 4px 0; border-radius: var(--gd-radius-xs); }
.gd-skeleton--title { height: 1.4em; width: 60%; }
.gd-skeleton--row   { height: 56px; }
.gd-skeleton--card  { height: 140px; border-radius: var(--gd-radius-lg); }
.gd-skeleton--avatar{ width: 48px; height: 48px; border-radius: var(--gd-radius-full); }

@keyframes gd-skeleton-pulse {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ----------------------------------------------------------------------------
   Stack / Cluster utilities — light spacing helpers
---------------------------------------------------------------------------- */
.gd-stack       { display: flex; flex-direction: column; gap: var(--gd-space-4); }
.gd-stack-sm    { gap: var(--gd-space-2); }
.gd-stack-lg    { gap: var(--gd-space-6); }
.gd-cluster     { display: flex; flex-wrap: wrap; gap: var(--gd-space-2); align-items: center; }
.gd-cluster-sm  { gap: var(--gd-space-1); }
.gd-divider     { height: 1px; background: var(--gd-divider); border: 0; margin: var(--gd-space-4) 0; }