@layer components {

  /* ─── Custom elements — layout-transparent wrappers ───── */

  confirm-dialog,
  autosave-form,
  details-menu,
  days-picker,
  med-search {
    display: contents;
  }

  /* ─── Buttons ──────────────────────────────────────────── */

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-block-size: var(--tap-min);
    padding-inline: var(--space-6);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    touch-action: manipulation;
    transition: background-color var(--transition), color var(--transition),
                border-color var(--transition), box-shadow var(--transition);
    user-select: none;
  }

  .btn--primary {
    background-color: var(--color-primary);
    color: var(--color-card);
  }

  .btn--primary:hover {
    background-color: color-mix(in srgb, var(--color-primary) 85%, var(--color-text));
  }

  .btn--secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
  }

  .btn--secondary:hover {
    background-color: color-mix(in srgb, var(--color-primary) 10%, transparent);
  }

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

  .btn--full {
    inline-size: 100%;
  }

  .btn--sm {
    padding-block: 0.4em;
    padding-inline: 0.9em;
    font-size: var(--font-size-sm);
    min-block-size: unset;
  }

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


  /* ─── Form elements ─────────────────────────────────────── */

  .form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }

  .form-group label {
    font-weight: 600;
    font-size: var(--font-size-base);
    color: var(--color-text);
  }

  .input {
    inline-size: 100%;
    min-block-size: var(--tap-min);
    padding-inline: var(--space-4);
    background-color: var(--color-card);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
    touch-action: manipulation;
  }

  .input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 25%, transparent);
  }

  .input::placeholder {
    color: var(--color-muted);
  }

  .input--error {
    border-color: var(--color-danger);
  }

  .field-error {
    font-size: var(--font-size-sm);
    color: var(--color-danger);
  }


  /* ─── Alert banner ──────────────────────────────────────── */

  .alert {
    padding: var(--space-4);
    border-radius: var(--radius-sm);
    font-weight: 500;
  }

  .alert--error {
    background-color: color-mix(in srgb, var(--color-danger) 12%, transparent);
    color: var(--color-danger);
    border: 1px solid color-mix(in srgb, var(--color-danger) 30%, transparent);
  }

  .alert--success {
    background-color: color-mix(in srgb, var(--color-primary) 12%, transparent);
    color: color-mix(in srgb, var(--color-primary) 70%, var(--color-text));
    border: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
  }

  .alert--warning {
    background-color: color-mix(in srgb, var(--color-warning) 12%, transparent);
    color: color-mix(in srgb, var(--color-warning) 70%, var(--color-text));
    border: 1px solid color-mix(in srgb, var(--color-warning) 30%, transparent);
  }

  .alert--info {
    background-color: color-mix(in srgb, var(--color-primary) 10%, transparent);
    color: var(--color-text);
    border: 1px solid color-mix(in srgb, var(--color-primary) 40%, transparent);
  }

  .alert__link {
    color: inherit;
    font-weight: 700;
    text-decoration: underline;
  }

  /* ─── Pro gate ───────────────────────────────────────────── */

  .pro-gate {
    display: flex;
    align-items: center;
    gap: 1em;
    padding: 1em;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    flex-wrap: wrap;
  }

  .pro-gate p {
    margin: 0;
    flex: 1;
  }

  /* ─── Upgrade nav link ───────────────────────────────────── */

  .app-nav__link--upgrade {
    color: var(--color-primary);
    font-weight: 600;
  }

  .profile-option--upgrade {
    color: var(--color-primary);
    font-weight: 600;
  }


  /* ─── Card ──────────────────────────────────────────────── */

  .card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
  }


  /* ─── Auth layout ───────────────────────────────────────── */

  .auth-layout {
    display: grid;
    place-items: center;
    min-block-size: 100dvh;
    padding: var(--space-4);
    background-color: var(--color-surface);
  }

  .auth-card {
    inline-size: min(100%, 26rem);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    box-shadow: var(--shadow-md);
  }

  .auth-brand {
    text-align: center;
  }

  .auth-logo {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    letter-spacing: -0.02em;
  }

  .auth-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-muted);
    margin-block-start: var(--space-1);
  }

  .auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
  }

  .auth-switch {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--color-muted);
  }


  /* ─── Save indicator ─────────────────────────────────────── */

  .save-indicator {
    position: fixed;
    inset-block-end: var(--space-6);
    inset-inline-end: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding-block: var(--space-2);
    padding-inline: var(--space-4);
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    z-index: 50;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
  }

  .save-indicator--saved {
    opacity: 1;
    visibility: visible;
    color: var(--color-primary);
    animation: save-fade-out 0.35s ease-out 2s forwards;
  }

  @keyframes save-fade-out {
    to { opacity: 0; visibility: hidden; }
  }

  .save-indicator--error {
    opacity: 1;
    visibility: visible;
    color: var(--color-danger);
    pointer-events: auto;
    border-color: var(--color-danger);
  }

  @media (prefers-reduced-motion: reduce) {
    .save-indicator--saved {
      animation: save-fade-out 0.01s 2s forwards;
    }
  }


  /* ─── QR Button ──────────────────────────────────────────── */

  .qr-btn {
    display: inline-grid;
    grid-auto-flow: column;
    grid-auto-columns: auto;
    place-items: center;
    column-gap: 0.375em;
    min-block-size: var(--tap-min);
    padding-block: 0;
    padding-inline: var(--space-3);
    border: none;
    border-radius: var(--radius-md);
    background: none;
    color: var(--color-muted);
    font-size: var(--font-size-sm);
    cursor: pointer;
    touch-action: manipulation;
    user-select: none;
    transition: color var(--transition), background-color var(--transition);
  }

  .qr-btn:hover {
    color: var(--color-primary);
    background-color: color-mix(in srgb, var(--color-primary) 10%, transparent);
  }

  .qr-btn:focus-visible {
    outline: var(--focus-ring);
    outline-offset: var(--focus-offset);
  }

  .qr-btn svg {
    inline-size: 1.25rem;
    block-size: 1.25rem;
    flex-shrink: 0;
  }


  /* ─── QR Code Modal ──────────────────────────────────────── */

  .qr-modal {
    position: fixed;
    inset: 0;
    margin: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 0;
    background-color: var(--color-card);
    box-shadow: var(--shadow-lg);
    max-inline-size: min(22rem, calc(100vw - 2rem));
  }

  .qr-modal::backdrop {
    background-color: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(4px);
  }

  @media (prefers-reduced-motion: no-preference) {
    .qr-modal[open] {
      animation: qr-modal-in 220ms cubic-bezier(0.34, 1.2, 0.64, 1) forwards;
    }

    .qr-modal::backdrop {
      animation: qr-backdrop-in 220ms ease forwards;
    }
  }

  @keyframes qr-modal-in {
    from {
      opacity: 0;
      scale: 0.94;
      translate: 0 0.75rem;
    }
  }

  @keyframes qr-backdrop-in {
    from { opacity: 0; }
  }

  .qr-modal__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-6);
  }

  .qr-modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    inline-size: 100%;
  }

  .qr-modal__title {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text);
  }

  .qr-modal__close {
    all: unset;
    display: grid;
    place-items: center;
    inline-size: 2.25rem;
    block-size: 2.25rem;
    border-radius: var(--radius-sm);
    color: var(--color-muted);
    cursor: pointer;
    touch-action: manipulation;
    transition: color var(--transition), background-color var(--transition);
  }

  .qr-modal__close:hover {
    color: var(--color-text);
    background-color: color-mix(in srgb, var(--color-text) 8%, transparent);
  }

  .qr-modal__close:focus-visible {
    outline: var(--focus-ring);
    outline-offset: var(--focus-offset);
  }

  .qr-modal__close svg {
    inline-size: 1.125rem;
    block-size: 1.125rem;
  }

  .qr-modal__code {
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    display: block;
  }

  .qr-modal__hint {
    font-size: var(--font-size-sm);
    color: var(--color-muted);
    text-align: center;
    line-height: 1.5;
  }

  /* ─── Legal pages ───────────────────────────────────────────── */

  .legal-page {
    max-inline-size: 65ch;
    margin-inline: auto;
    padding: var(--space-8) var(--space-4);
  }

  .legal-page h1 {
    margin-block-end: var(--space-4);
  }

  .legal-page h2 {
    font-size: var(--font-size-lg);
    margin-block-start: var(--space-8);
    margin-block-end: var(--space-2);
  }

  .legal-page h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-block-start: var(--space-4);
    margin-block-end: var(--space-1);
  }

  .legal-page p,
  .legal-page ul,
  .legal-page ol {
    margin-block-end: var(--space-3);
    color: var(--color-text);
  }

  .legal-page ul,
  .legal-page ol {
    padding-inline-start: 1.5em;
  }

  .legal-page li {
    margin-block-end: var(--space-1);
  }

  .legal-back {
    margin-block-end: var(--space-6);
  }

  /* ─── Site footer (public / legal pages) ────────────────────── */

  .site-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-3) var(--space-6);
    padding: var(--space-6) var(--space-4);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-muted);
    margin-block-start: var(--space-8);
  }

  .site-footer__links {
    display: flex;
    gap: var(--space-4);
  }

  .site-footer__links a {
    color: var(--color-muted);
  }

  /* ─── Data actions (settings "Your data") ───────────────────── */

  .data-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    margin-block-start: var(--space-4);
  }

  .data-action {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
  }

  .data-action h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
  }

  .data-action > p {
    color: var(--color-muted);
    font-size: var(--font-size-sm);
    max-inline-size: 50ch;
  }

  /* ─── Checkbox field ─────────────────────────────────────────── */

  .form-group--checkbox {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .form-group--checkbox input[type="checkbox"] {
    flex-shrink: 0;
    inline-size: 1.25rem;
    block-size: 1.25rem;
    margin-block-start: 0.1em;
    accent-color: var(--color-primary);
    cursor: pointer;
  }

  .form-group--checkbox label {
    font-size: var(--font-size-sm);
    cursor: pointer;
    font-weight: normal;
  }
}