/* ============================================================================
   YFF Design System — Component Styles
   ============================================================================

   This file contains all component class styles, organized by component.

   LOAD ORDER: Must load AFTER yff-tokens.css, before portal-specific CSS.

   NAMING: All component classes are namespaced to avoid collisions:
   - .button, .button-icon, .button.variant-*, .button.size-*
   - .badge, .badge.variant-*
   - etc.

   NO INLINE STYLES: Components in JSX use className only, never style={}.
   All styling happens here via CSS variables from yff-tokens.css.

   THEME SUPPORT: All colors/shadows use CSS variables so light/dark themes work automatically.

   ============================================================================ */

/* ============================================================================
   BUTTON
   ============================================================================ */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: 48px;
  padding: 0 24px;
  border-radius: var(--md-shape-full);
  font: var(--md-label-lg);
  font-family: var(--md-font-display);
  background: var(--md-primary);
  color: var(--md-on-primary);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--md-dur-short) var(--md-ease-standard);
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
  user-select: none;
}

.button:hover:not(:disabled) {
  /* State layer: 8% overlay of currentColor */
  box-shadow: var(--md-elev-1),
              inset 0 0 0 9999px rgba(0, 0, 0, var(--md-state-hover));
}

.button:active:not(:disabled) {
  /* State layer: 10% overlay */
  box-shadow: var(--md-elev-1),
              inset 0 0 0 9999px rgba(0, 0, 0, var(--md-state-pressed));
}

.button:focus-visible {
  outline: 2px solid var(--md-outline);
  outline-offset: 2px;
}

.button:disabled,
.button.disabled {
  background: rgba(21, 32, 44, var(--md-disabled-container));
  color: rgba(21, 32, 44, var(--md-disabled-content));
  cursor: not-allowed;
  box-shadow: none;
}

/* Icon inside button */
.button-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ── Button Variants ─────────────────────────────────────────────────────── */

.button.variant-tonal {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  box-shadow: none;
}

.button.variant-tonal:hover:not(:disabled) {
  box-shadow: var(--md-elev-1),
              inset 0 0 0 9999px rgba(0, 0, 0, var(--md-state-hover));
}

.button.variant-outlined {
  background: transparent;
  color: var(--md-on-primary-container);
  border: 1px solid var(--md-outline);
  box-shadow: none;
}

.button.variant-outlined:hover:not(:disabled) {
  box-shadow: inset 0 0 0 9999px rgba(0, 0, 0, var(--md-state-hover));
}

.button.variant-text {
  background: transparent;
  color: var(--md-on-primary-container);
  border: none;
  box-shadow: none;
}

.button.variant-text:hover:not(:disabled) {
  box-shadow: inset 0 0 0 9999px rgba(0, 0, 0, var(--md-state-hover));
}

.button.variant-brand {
  background: var(--yff-brand);
  color: var(--yff-on-brand);
  box-shadow: var(--md-elev-1);
}

.button.variant-brand:hover:not(:disabled) {
  box-shadow: var(--md-elev-1),
              inset 0 0 0 9999px rgba(0, 0, 0, var(--md-state-hover));
}

.button.variant-danger {
  background: var(--md-error);
  color: var(--md-on-error);
  box-shadow: var(--md-elev-1);
}

.button.variant-danger:hover:not(:disabled) {
  box-shadow: var(--md-elev-1),
              inset 0 0 0 9999px rgba(0, 0, 0, var(--md-state-hover));
}

/* ── Button Sizes ────────────────────────────────────────────────────────── */

.button.size-sm {
  min-height: 40px;
  padding: 0 16px;
  font: var(--md-label-md);
  gap: var(--sp-2);
}

.button.size-lg {
  min-height: 56px;
  padding: 0 28px;
  font: var(--md-label-lg);
  gap: var(--sp-3);
}

/* ── Button Block (full width) ───────────────────────────────────────────── */

.button.block {
  display: flex;
  width: 100%;
}


/* ============================================================================
   BADGE
   ============================================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
  min-height: 24px;
  padding: var(--sp-1) var(--sp-2);
  border-radius: var(--md-shape-full);
  font: var(--md-label-sm);
  font-family: var(--md-font-display);
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border: none;
  user-select: none;
}

.badge.variant-tonal {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

.badge.variant-filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
}


/* ============================================================================
   CARD
   ============================================================================ */

.card {
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-lg);
  box-shadow: var(--md-elev-1);
  padding: var(--sp-5);
  overflow: hidden;
}

.card > *:first-child {
  margin-top: 0;
}

.card > *:last-child {
  margin-bottom: 0;
}


/* ============================================================================
   CHIP
   ============================================================================ */

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--md-shape-full);
  font: var(--md-label-md);
  font-family: var(--md-font-display);
  background: var(--md-surface-container-high);
  color: var(--md-on-surface-strong);
  border: 1px solid var(--md-outline-variant);
  cursor: pointer;
  transition: all var(--md-dur-short) var(--md-ease-standard);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

.chip:hover {
  background: var(--md-surface-container-highest);
}

.chip:focus-visible {
  outline: 2px solid var(--md-outline);
  outline-offset: 2px;
}

.chip.selected {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  border-color: var(--md-primary);
}


/* ============================================================================
   ICON BUTTON
   ============================================================================ */

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border-radius: var(--md-shape-full);
  background: transparent;
  color: var(--md-on-surface-variant);
  border: none;
  cursor: pointer;
  transition: all var(--md-dur-short) var(--md-ease-standard);
  -webkit-tap-highlight-color: transparent;
}

.icon-button:hover:not(:disabled) {
  background: rgba(0, 0, 0, var(--md-state-hover));
  color: var(--md-on-surface);
}

.icon-button:focus-visible {
  outline: 2px solid var(--md-outline);
  outline-offset: 2px;
}

.icon-button:disabled {
  color: rgba(21, 32, 44, var(--md-disabled-content));
  cursor: not-allowed;
}

.icon-button.variant-filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.icon-button.variant-filled:hover:not(:disabled) {
  background: var(--md-primary);
  box-shadow: inset 0 0 0 9999px rgba(0, 0, 0, var(--md-state-hover));
}


/* ============================================================================
   SWITCH
   ============================================================================ */

.switch {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.switch-track {
  position: relative;
  width: 52px;
  height: 32px;
  background: var(--md-surface-container-high);
  border-radius: var(--md-shape-full);
  border: 2px solid var(--md-outline-variant);
  transition: all var(--md-dur-short) var(--md-ease-standard);
  flex-shrink: 0;
}

.switch input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  cursor: pointer;
}

.switch input:checked ~ .switch-track {
  background: var(--md-primary);
  border-color: var(--md-primary);
}

.switch-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  border-radius: var(--md-shape-full);
  background: var(--md-outline-variant);
  box-shadow: var(--md-elev-1);
  transition: all var(--md-dur-short) var(--md-ease-standard);
}

.switch input:checked ~ .switch-track .switch-thumb {
  left: 26px;
  background: var(--md-on-primary);
}

.switch:focus-visible input {
  outline: 2px solid var(--md-outline);
  outline-offset: 2px;
}


/* ============================================================================
   TEXT FIELD / INPUT
   ============================================================================ */

.text-field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  width: 100%;
}

.text-field label {
  font: var(--md-label-md);
  font-family: var(--md-font-display);
  color: var(--md-on-surface-strong);
}

.text-field input,
.text-field textarea {
  font: var(--md-body-md);
  font-family: var(--md-font-body);
  color: var(--md-on-surface);
  background: var(--md-surface-container-low);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-md);
  padding: var(--sp-3) var(--sp-4);
  transition: all var(--md-dur-short) var(--md-ease-standard);
}

.text-field input::placeholder,
.text-field textarea::placeholder {
  color: var(--md-on-surface-variant);
}

.text-field input:focus,
.text-field textarea:focus {
  outline: none;
  border-color: var(--md-primary);
  background: var(--md-surface);
}

.text-field input:disabled,
.text-field textarea:disabled {
  background: rgba(21, 32, 44, var(--md-disabled-container));
  color: rgba(21, 32, 44, var(--md-disabled-content));
  cursor: not-allowed;
}

.text-field-help {
  font: var(--md-body-sm);
  color: var(--md-on-surface-variant);
  margin-top: var(--sp-1);
}

.text-field-error {
  color: var(--md-error);
}


/* ============================================================================
   STAT TILE
   ============================================================================ */

.stat-tile {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--md-shape-lg);
  padding: var(--sp-4);
  box-shadow: var(--md-elev-1);
}

.stat-tile-label {
  font: var(--md-label-sm);
  font-family: var(--md-font-display);
  color: var(--md-on-surface-variant);
  letter-spacing: var(--md-track-wide);
  text-transform: uppercase;
}

.stat-tile-value {
  font: var(--md-display-sm);
  font-family: var(--md-font-display);
  color: var(--md-on-surface);
  margin: 0;
}

.stat-tile-supporting {
  font: var(--md-body-sm);
  color: var(--md-on-surface-variant);
}


/* ============================================================================
   MODAL / DIALOG (Base styles for visibility)
   ============================================================================ */

.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--md-scrim);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--md-dur-medium) var(--md-ease-standard);
  z-index: 1000;
}

.modal.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background: var(--md-surface);
  border-radius: var(--md-shape-xl);
  box-shadow: var(--md-elev-5);
  padding: var(--sp-6);
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  animation: popIn var(--md-dur-medium) var(--md-ease-standard);
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}


/* ============================================================================
   SNACKBAR / TOAST
   ============================================================================ */

.snackbar {
  position: fixed;
  left: 50%;
  bottom: var(--sp-4);
  transform: translateX(-50%) translateY(16px);
  background: var(--md-inverse-surface);
  color: var(--md-inverse-on-surface);
  border-radius: var(--md-shape-full);
  padding: var(--sp-3) var(--sp-5);
  font: var(--md-body-md);
  box-shadow: var(--md-elev-5);
  opacity: 0;
  pointer-events: none;
  transition: all var(--md-dur-medium) var(--md-ease-standard);
  z-index: 1500;
}

.snackbar.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}


/* ============================================================================
   SEGMENTED CONTROL (Tab-like button group)
   ============================================================================ */

.segmented-control {
  display: inline-flex;
  align-items: center;
  gap: 0;
  background: var(--md-surface-container-high);
  border-radius: var(--md-shape-full);
  padding: var(--sp-1);
}

.segmented-control-button {
  flex: 1;
  padding: var(--sp-2) var(--sp-4);
  border: none;
  background: transparent;
  color: var(--md-on-surface-variant);
  font: var(--md-label-md);
  font-family: var(--md-font-display);
  cursor: pointer;
  border-radius: calc(var(--md-shape-full) - 2px);
  transition: all var(--md-dur-short) var(--md-ease-standard);
  -webkit-tap-highlight-color: transparent;
}

.segmented-control-button:hover {
  background: rgba(0, 0, 0, var(--md-state-hover));
}

.segmented-control-button.selected {
  background: var(--md-surface);
  color: var(--md-on-surface);
  box-shadow: var(--md-elev-1);
}


/* ============================================================================
   UTILITY CLASSES (Optional, for quick styling without components)
   ============================================================================ */

/* Visually hidden but accessible to screen readers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Disabled state */
.disabled {
  opacity: var(--md-disabled-content);
  cursor: not-allowed;
}

/* Text utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--md-on-surface-variant); }
.text-strong { color: var(--md-on-surface-strong); }

/* Spacing utilities (emergency only — prefer component padding) */
.gap-1 { gap: var(--sp-1); }
.gap-2 { gap: var(--sp-2); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }