@layer components {
  /* Drag Handle */
  .drag-handle {
    cursor: grab;
    color: var(--text-muted);
    font-size: var(--font-size-md);
    user-select: none;
    padding: 0 2px;
    line-height: 1;
  }

  .drag-handle:active {
    cursor: grabbing;
  }

  /* Numeric Spinner */
  poly-numeric-spinner {
    display: inline-flex;
    align-items: stretch;
  }

  .spinner-input {
    text-align: center;
    font-family: var(--font-mono);
    font-size: var(--font-size-md);
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    padding: var(--space-xs);
    color: var(--text-primary);
    min-width: 3ch;
  }

  .spinner-input:focus {
    border-color: var(--border-color-focus);
    outline: none;
  }

  .spinner-btn-wrapper {
    display: flex;
    flex-direction: column;
  }

  .spinner-btn {
    background: var(--btn-bg);
    color: var(--text-muted);
    border: 1px solid var(--input-border);
    border-left: none;
    font-size: 0.5rem;
    line-height: 1;
    padding: 0 4px;
    cursor: pointer;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
  }

  .spinner-inc {
    border-radius: 0 var(--radius-sm) 0 0;
    border-bottom: none;
  }

  .spinner-dec {
    border-radius: 0 0 var(--radius-sm) 0;
  }

  .spinner-btn:hover {
    background: var(--btn-hover);
  }

  .spinner-label {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: var(--font-size-md);
  }

  /* Roller */
  .roller {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-surface);
    border-radius: var(--radius-md);
    flex-wrap: wrap;
    overflow: hidden;
    position: relative;
  }

  /* On desktop, wrapper divs are invisible to flex layout */
  .roller-controls,
  .roller-formula {
    display: contents;
  }

  .roller-name {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
    width: clamp(6ch, 20%, 16ch);
  }

  .roller-name:focus {
    border-color: var(--border-color-focus);
    outline: none;
  }

  .roller-d-label {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: var(--font-size-md);
  }

  .roller-result {
    font-family: var(--font-mono);
    font-size: var(--font-size-md);
    min-width: 8ch;
    text-align: center;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    white-space: nowrap;
  }

  .roller-result:empty {
    display: none;
  }

  .roller-result.crit,
  .roller-result .crit {
    color: var(--crit-color);
    background: var(--crit-bg);
    font-weight: bold;
  }

  .roller-result.fail,
  .roller-result .fail {
    color: var(--fail-color);
    background: var(--fail-bg);
    font-weight: bold;
  }

  /* Dropped dice (kept/dropped by slice) */
  .dropped {
    text-decoration: line-through;
    opacity: 0.4;
  }

  /* Comparison result badges */
  .comparison-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    margin-left: 0.5rem;
    vertical-align: middle;
  }

  .comparison-badge.pass {
    background: var(--crit-bg);
    color: var(--crit-color);
  }

  .comparison-badge.partial {
    background: rgba(230, 180, 0, 0.2);
    color: #d4a017;
  }

  .comparison-badge.fail {
    background: var(--fail-bg);
    color: var(--fail-color);
  }

  /* ── Modifier Panel ────────────────────────────────────────────────── */

  .modifier-panel {
    width: 100%;
    margin-top: 0.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 0.5rem;
  }

  .modifier-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
  }

  .modifier-row {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.375rem;
    background: var(--bg-tertiary);
    border-radius: 0.25rem;
    min-height: 2rem;
    flex-wrap: wrap;
  }

  .modifier-handle {
    cursor: grab;
    font-size: 0.75rem;
    opacity: 0.5;
  }

  .modifier-label {
    flex: 1;
    font-size: 0.8125rem;
    cursor: pointer;
    padding: 0.125rem 0;
  }

  .modifier-delete {
    font-size: 0.75rem;
    padding: 0 0.25rem;
    min-width: 1.5rem;
    min-height: 1.5rem;
  }

  .modifier-add-btn {
    width: 100%;
    margin-top: 0.375rem;
    font-size: 0.8125rem;
    padding: 0.375rem;
  }

  /* Add modifier menu */
  .modifier-menu {
    position: absolute;
    z-index: 100;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.5rem 0;
    min-width: 12rem;
    box-shadow: var(--shadow-md);
    max-height: 60vh;
    overflow-y: auto;
    color: var(--text-primary);
  }

  .modifier-menu-heading {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.5;
    padding: 0.5rem 0.75rem 0.25rem;
  }

  .modifier-menu-item {
    display: block;
    width: 100%;
    text-align: left;
    background: none;
    border: none;
    color: inherit;
    font-size: 0.8125rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
  }

  .modifier-menu-item:hover {
    background: var(--btn-bg);
  }

  /* Inline modifier editor */
  .modifier-editor {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    padding: 0.375rem 0;
    width: 100%;
  }

  .modifier-editor-field {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
  }

  .modifier-editor-field select,
  .modifier-editor-input {
    font-size: 0.75rem;
    padding: 0.125rem 0.25rem;
    background: var(--input-bg);
    color: var(--text-primary);
    border: 1px solid var(--input-border);
    border-radius: 0.25rem;
  }

  .modifier-editor-input {
    width: 3.5rem;
  }


  .roller-result.animating {
    white-space: pre;
    position: absolute;
    right: 3rem;
    top: 50%;
    transform: translateY(-50%);
    animation: pulse 0.3s ease-in-out infinite alternate;
    pointer-events: none;
    z-index: 1;
  }

  @keyframes pulse {
    from { opacity: 0.6; }
    to { opacity: 1; }
  }

  /* Buttons */
  .btn {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
    white-space: nowrap;
  }

  .btn-action {
    background: var(--accent);
    color: white;
  }

  .btn-action:hover {
    background: var(--accent-hover);
  }

  .btn-subtle {
    background: var(--btn-bg);
    color: var(--text-primary);
  }

  .btn-subtle:hover {
    background: var(--btn-hover);
  }

  .btn-danger {
    background: var(--btn-danger);
    color: white;
  }

  .btn-danger:hover {
    background: var(--btn-danger-hover);
  }

  .btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }

  /* Roller Group */
  poly-roller-group {
    display: block;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    margin-block-end: var(--space-lg);
    min-width: 0;
  }

  .group-header {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding-block-end: var(--space-sm);
    border-block-end: 1px solid var(--border-color);
    margin-block-end: var(--space-sm);
    flex-wrap: wrap;
  }

  .group-name {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
    font-size: var(--font-size-md);
    width: clamp(8ch, 25%, 20ch);
  }

  .group-name:focus {
    border-color: var(--border-color-focus);
    outline: none;
  }

  .group-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }

  .group-body.collapsed {
    display: none;
  }

  .group-add-roller {
    width: 100%;
    padding: var(--space-sm);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    background: transparent;
    margin-block-start: var(--space-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-fast), color var(--transition-fast);
  }

  .group-add-roller:hover {
    border-color: var(--accent);
    color: var(--text-primary);
  }

  /* Right-align delete buttons */
  .group-delete-btn,
  .roller-delete-btn {
    margin-inline-start: auto;
  }

  /* App */
  poly-roller-app {
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
    max-width: 100%;
    overflow-x: hidden;
  }

  .app-topbar {
    position: sticky;
    top: 0;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border-block-end: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 100;
  }

  .app-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
  }

  .app-unsaved-indicator {
    color: var(--accent);
    font-weight: bold;
  }

  .app-settings-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 199;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
  }

  .app-settings-overlay.open {
    opacity: 1;
    pointer-events: auto;
  }

  .app-settings {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 85vw);
    height: 100dvh;
    background: var(--bg-secondary);
    border-inline-start: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    z-index: 200;
    padding: var(--space-lg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }

  .app-settings.open {
    transform: translateX(0);
  }

  .app-settings label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
  }

  .app-settings hr {
    border: none;
    border-top: 1px solid var(--border-color);
  }

  .app-body {
    flex: 1;
    padding: var(--space-md);
    overflow-y: auto;
    overflow-x: hidden;
  }

  .app-add-group {
    width: 100%;
    padding: var(--space-sm);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    background: transparent;
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: border-color var(--transition-fast), color var(--transition-fast);
  }

  .app-add-group:hover {
    border-color: var(--accent);
    color: var(--text-primary);
  }

  .app-toast-container {
    position: fixed;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    pointer-events: none;
  }

  .app-toast {
    background: var(--toast-bg);
    color: var(--toast-text);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    animation: toast-in 0.3s ease;
    pointer-events: auto;
  }

  @keyframes toast-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .app-toast.fade-out {
    animation: toast-out 0.3s ease forwards;
  }

  @keyframes toast-out {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-10px); }
  }

  .api-key-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    padding-inline-start: var(--space-lg);
    margin-block-start: var(--space-sm);
  }

  .api-key-section input {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    padding: var(--space-xs) var(--space-sm);
  }

  .api-key-status {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
  }

  /* Card Stack (Results Carousel) */
  .group-card-stack {
    margin-block-start: var(--space-sm);
    overflow: hidden;
  }

  .card-stack-nav {
    display: flex;
    align-items: stretch;
    gap: var(--space-xs);
  }

  .card-nav-prev,
  .card-nav-next {
    flex-shrink: 0;
    width: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
  }

  .card-stack-viewport {
    flex: 1;
    min-width: 0;
    display: flex;
    gap: var(--space-sm);
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    min-height: 3rem;
    padding: var(--space-xs) 0;
  }

  .card-stack-viewport:empty::before {
    content: 'Roll dice to see results here';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-style: italic;
  }

  /* Hide scrollbar but keep scrolling */
  .card-stack-viewport {
    scrollbar-width: none;
  }
  .card-stack-viewport::-webkit-scrollbar {
    display: none;
  }

  .result-card {
    flex: 0 0 100%;
    scroll-snap-align: center;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-sm) var(--space-md);
    min-width: 0;
    user-select: text;
  }

  .result-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-block-end: var(--space-xs);
    padding-block-end: var(--space-xs);
    border-block-end: 1px solid var(--border-color);
  }

  .result-card-index {
    font-weight: bold;
    color: var(--text-secondary);
  }

  .result-card-source {
    margin-inline-start: auto;
    cursor: help;
    font-size: 1rem;
  }

  .result-card-roller {
    padding: var(--space-xs) 0;
  }

  .result-card-name {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
  }

  .result-card-total {
    font-family: var(--font-mono);
    font-size: var(--font-size-md);
    font-weight: bold;
    color: var(--text-primary);
  }

  .result-card-breakdown {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    padding-inline-start: var(--space-md);
  }

  .result-card-breakdown .crit {
    color: var(--crit-color);
    font-weight: bold;
  }

  .result-card-breakdown .fail {
    color: var(--fail-color);
    font-weight: bold;
  }

  .card-stack-slider {
    width: 100%;
    margin-block: var(--space-xs);
    accent-color: var(--accent);
    height: 1.5rem;
  }

  .card-stack-slider-label {
    display: block;
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
  }

  .card-stack-clear {
    display: block;
    margin: var(--space-xs) auto 0;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
  }

  /* Compact Roller (mobile view) */
  .roller-compact {
    display: none;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
  }

  .roller-compact-name {
    font-size: var(--font-size-md);
    color: var(--text-primary);
    cursor: pointer;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
  }

  .roller-compact-formula {
    font-family: var(--font-mono);
    font-size: var(--font-size-md);
    color: var(--text-secondary);
    cursor: pointer;
    flex: 1;
    text-align: center;
  }

  .roller-compact-roll {
    flex-shrink: 0;
  }

  .roller-expanded {
    display: contents;
  }

  /* Responsive */
  @media (max-width: 600px) {
    .app-body {
      padding: var(--space-sm);
    }

    .roller {
      gap: var(--space-xs);
      padding: var(--space-xs) var(--space-sm);
    }

    /* Compact roller cards on mobile */
    .roller-compact {
      display: flex;
    }

    .roller-expanded {
      display: none;
      flex-direction: column;
      gap: var(--space-sm);
      width: 100%;
      padding: var(--space-sm);
      background: var(--bg-tertiary);
      border-radius: var(--radius-sm);
      margin-block-start: var(--space-xs);
    }

    .roller-expanded.expanded {
      display: flex;
    }

    /* In expanded mode, controls and formula are real flex containers */
    .roller-expanded .roller-controls {
      display: flex;
      align-items: center;
      gap: var(--space-sm);
      width: 100%;
    }

    .roller-expanded .roller-formula {
      display: flex;
      align-items: center;
      gap: var(--space-sm);
      width: 100%;
      flex-wrap: wrap;
    }

    .roller-expanded .roller-controls .roller-name {
      flex: 1;
      min-width: 0;
    }

    /* 48px touch targets on mobile */
    .roller-compact-roll,
    .roller-expanded .btn {
      min-height: 48px;
      min-width: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .roller-compact-handle {
      min-width: 48px;
      min-height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    /* Hide desktop drag handle in expanded view on mobile */
    .roller-expanded .drag-handle {
      display: none;
    }

    .group-header {
      gap: var(--space-xs);
    }

    .group-name {
      width: clamp(6ch, 30%, 14ch);
    }

    poly-roller-group {
      padding: var(--space-sm);
    }

    /* Minimum touch target for card nav */
    .card-nav-prev,
    .card-nav-next {
      min-height: 44px;
      min-width: 44px;
    }

    .card-stack-slider {
      height: 2.5rem;
    }

    .roller-expanded .roller-roll-btn {
      display: none;
    }

    .modifier-row {
      min-height: 2.5rem;
    }

    .modifier-menu-item {
      min-height: 2.75rem;
      display: flex;
      align-items: center;
    }
  }

  @media (min-width: 601px) and (max-width: 1024px) {
    .app-body {
      width: 100%;
      padding: var(--space-md) var(--space-lg);
    }

    poly-roller {
      overflow: hidden;
    }

    /* 44px touch targets on tablet */
    .app-menu-toggle,
    .group-collapse-btn,
    .group-roll-btn,
    .group-clone-btn,
    .group-delete-btn,
    .roller-compact-roll,
    .roller-compact-handle {
      min-height: 44px;
      min-width: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .card-nav-prev,
    .card-nav-next {
      min-width: 44px;
    }

    .roller-expanded .btn {
      min-height: 44px;
      min-width: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    /* Transition zone: compact cards with wider spacing */
    .roller-compact {
      display: flex;
    }

    .roller-expanded {
      display: none;
      flex-direction: column;
      gap: var(--space-md);
      width: 100%;
      padding: var(--space-md);
      background: var(--bg-tertiary);
      border-radius: var(--radius-sm);
      margin-block-start: var(--space-sm);
    }

    .roller-expanded.expanded {
      display: flex;
    }

    .roller-expanded .roller-controls {
      display: flex;
      align-items: center;
      gap: var(--space-md);
      width: 100%;
    }

    .roller-expanded .roller-formula {
      display: flex;
      align-items: center;
      gap: var(--space-md);
      width: 100%;
      flex-wrap: wrap;
    }

    .roller-expanded .roller-controls .roller-name {
      flex: 1;
      min-width: 0;
    }

    .roller-expanded .drag-handle {
      display: none;
    }

    .roller-expanded .roller-roll-btn {
      display: none;
    }
  }

  @media (min-width: 1025px) {
    .app-body {
      width: 100%;
      max-width: 1200px;
      margin-inline: auto;
      padding: var(--space-lg);
    }
  }

  /* Mobile Layout (forced by compact mode or narrow viewport) */
  poly-roller-app.mobile-layout .app-topbar {
    padding: var(--space-xs) var(--space-sm);
  }

  poly-roller-app.mobile-layout .app-title,
  poly-roller-app.mobile-layout .app-unsaved-indicator {
    display: none;
  }

  poly-roller-app.mobile-layout .roller-compact {
    display: flex;
  }

  poly-roller-app.mobile-layout .roller-expanded {
    display: none;
    flex-direction: column;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-block-start: var(--space-xs);
  }

  poly-roller-app.mobile-layout .roller-expanded.expanded {
    display: flex;
  }

  poly-roller-app.mobile-layout .roller-expanded .roller-controls {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
  }

  poly-roller-app.mobile-layout .roller-expanded .roller-formula {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    width: 100%;
    flex-wrap: wrap;
  }

  poly-roller-app.mobile-layout .roller-expanded .roller-roll-btn {
    display: none;
  }

  /* Drag and Drop */
  .dragging {
    opacity: 0.4;
    outline: 2px dashed var(--accent);
  }

  .drop-indicator {
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
    margin: var(--space-xs) 0;
  }

  .drag-clone {
    position: fixed;
    pointer-events: none;
    opacity: 0.8;
    z-index: 1000;
    box-shadow: var(--shadow-md);
  }
}