/* ============================================================
   DCMS Portal — 04 components
   Buttons, forms, badges, cards, modals, code UI, theme toggle.
   ============================================================ */

@layer components {
  /* ==================================================================
     Buttons
     ================================================================== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 16px;
    font-size: var(--fs-base);
    font-weight: 650;
    line-height: 1.2;
    white-space: nowrap;
    color: var(--text);
    border: 1px solid transparent;
    border-radius: var(--radius-input);
    cursor: pointer;
    user-select: none;
    text-decoration: none;
    transition: background var(--dur-fast) var(--ease-out),
      border-color var(--dur-fast) var(--ease-out),
      color var(--dur-fast) var(--ease-out),
      box-shadow var(--dur-quick) var(--ease-out),
      transform var(--dur-quick) var(--ease-out);
  }

  .btn:hover {
    text-decoration: none;
  }

  .btn:disabled {
    cursor: default;
  }

  /* Primary: amber gradient, near-black ink — never white on amber. */
  .btn-primary {
    background: linear-gradient(180deg, var(--accent-from), var(--accent-to));
    color: var(--on-accent);
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), var(--shadow-sm);
  }

  .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.35), var(--shadow-glow);
  }

  .btn-primary:active {
    transform: translateY(0);
    filter: brightness(0.96);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.12), var(--shadow-sm);
  }

  .btn-primary .icon {
    color: var(--on-accent);
  }

  /* Ghost: quiet outline. */
  .btn-ghost {
    background: transparent;
    border-color: var(--border-strong);
    color: var(--text);
  }

  .btn-ghost:hover {
    background: var(--surface-2);
  }

  .btn-ghost:active {
    background: var(--surface-3);
  }

  .btn-ghost .icon {
    color: var(--text-muted);
  }

  /* Danger ghost: destructive but calm until hovered. */
  .btn-danger-ghost {
    color: var(--danger-ink);
    border-color: transparent;
  }

  .btn-danger-ghost .icon {
    color: var(--danger-ink);
  }

  .btn-danger-ghost:hover {
    background: var(--danger-soft);
    border-color: transparent;
  }

  /* Inline text link button. */
  .btn-link {
    display: inline;
    padding: 0;
    background: none;
    border: 0;
    color: var(--accent-ink);
    font-size: inherit;
    font-weight: 650;
    cursor: pointer;
  }

  .btn-link:hover {
    text-decoration: underline;
    text-underline-offset: 3px;
  }

  .btn-link:disabled {
    opacity: 0.55;
    text-decoration: none;
  }

  /* Sizes / shapes. */
  .btn-block {
    display: flex;
    width: 100%;
  }

  .btn-lg {
    padding: 13px 20px;
    font-size: var(--fs-md);
    border-radius: 12px;
  }

  .btn-sm {
    padding: 6px 10px;
    font-size: var(--fs-sm);
    border-radius: var(--radius-sm);
    gap: 6px;
  }

  .btn-icon {
    padding: 8px;
  }

  .btn-icon-plain {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    background: transparent;
    border: 0;
    cursor: pointer;
    transition: background var(--dur-fast) var(--ease-out),
      color var(--dur-fast) var(--ease-out);
  }

  .btn-icon-plain:hover {
    background: var(--surface-2);
    color: var(--text);
  }

  .btn-label {
    pointer-events: none;
  }

  /* Busy: keep width, dim label, append a spinner. */
  .is-busy {
    pointer-events: none;
    opacity: 0.75;
  }

  .is-busy::after {
    content: "";
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 600ms linear infinite;
  }

  /* ==================================================================
     Forms
     ================================================================== */
  .field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: var(--space-4);
  }

  .field-label {
    font-size: var(--fs-sm);
    font-weight: 650;
    color: var(--text);
  }

  .field-label .muted {
    font-weight: 500;
  }

  .input {
    width: 100%;
    padding: 10px 12px;
    font-size: var(--fs-base);
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-input);
    transition: border-color var(--dur-fast) var(--ease-out),
      box-shadow var(--dur-fast) var(--ease-out),
      background var(--dur-fast) var(--ease-out);
  }

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

  .input:hover {
    border-color: var(--text-faint);
  }

  .input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-ring);
  }

  .input-lg {
    padding: 13px 14px;
    font-size: var(--fs-md);
    border-radius: 12px;
  }

  .select {
    appearance: none;
    padding-right: 38px;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%237E93A8' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
  }

  .textarea {
    resize: vertical;
    min-height: 96px;
    line-height: 1.55;
  }

  .field-error {
    font-size: var(--fs-sm);
    font-weight: 550;
    color: var(--danger-ink);
  }

  .form-error {
    margin: 0 0 var(--space-4);
    padding: 10px 12px;
    font-size: var(--fs-sm);
    font-weight: 550;
    color: var(--danger-ink);
    background: var(--danger-soft);
    border: 1px solid var(--danger-soft);
    border-radius: var(--radius-input);
  }

  .alert {
    display: block;
    margin-bottom: var(--space-5);
    padding: 12px 14px;
    font-size: var(--fs-sm);
    line-height: 1.5;
    border-radius: var(--radius-input);
    background: var(--info-soft);
    color: var(--info-ink);
    border: 1px solid transparent;
  }

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

  /* ==================================================================
     Badges
     ================================================================== */
  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    font-size: var(--fs-xs);
    font-weight: 650;
    letter-spacing: 0.02em;
    line-height: 1.5;
    white-space: nowrap;
    border-radius: var(--radius-pill);
    background: var(--surface-2);
    color: var(--text-muted);
  }

  .badge-dot::before {
    content: "";
    width: 6px;
    height: 6px;
    flex-shrink: 0;
    border-radius: 50%;
    background: currentColor;
  }

  .badge-success {
    background: var(--success-soft);
    color: var(--success-ink);
  }

  .badge-success.badge-dot::before,
  .node-online .badge-dot::before {
    animation: pulse-dot 2s var(--ease-in-out) infinite;
  }

  .badge-idle {
    background: var(--surface-2);
    color: var(--text-muted);
  }

  /* Connection status: claimed and verified, but not currently online. */
  .badge-verified {
    background: var(--info-soft);
    color: var(--info-ink);
  }

  .badge-plan {
    background: var(--accent-soft);
    color: var(--accent-ink);
  }

  .badge-reason {
    background: var(--surface-2);
    color: var(--text-muted);
  }

  .badge-priority-low {
    background: var(--info-soft);
    color: var(--info-ink);
  }

  .badge-priority-high {
    background: var(--danger-soft);
    color: var(--danger-ink);
  }

  .badge-status-open {
    background: var(--success-soft);
    color: var(--success-ink);
  }

  .badge-status-pending {
    background: var(--accent-soft);
    color: var(--accent-ink);
  }

  .badge-status-closed {
    background: var(--surface-2);
    color: var(--text-muted);
  }

  /* ==================================================================
     Cards
     ================================================================== */
  .card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: var(--space-5) var(--space-6);
    box-shadow: var(--shadow-sm);
  }

  .card-title {
    font-size: var(--fs-md);
    font-weight: 700;
    letter-spacing: -0.005em;
    margin-bottom: var(--space-3);
  }

  /* ==================================================================
     Modals
     ================================================================== */
  .modal-overlay {
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    background: var(--overlay);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
    opacity: 0;
    transition: opacity var(--dur-quick) var(--ease-out);
  }

  .modal-overlay.open {
    opacity: 1;
  }

  .modal {
    width: min(520px, 100%);
    max-height: calc(100dvh - 48px);
    overflow-y: auto;
    padding: var(--space-6);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lift);
    transform: scale(0.96) translateY(10px);
    transition: transform var(--dur-quick) var(--ease-spring);
  }

  .modal-overlay.open .modal {
    transform: none;
  }

  body.modal-open {
    overflow: hidden;
  }

  .modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
  }

  .modal-title {
    font-size: var(--fs-lg);
    font-weight: 700;
    letter-spacing: -0.01em;
  }

  .modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    margin-top: var(--space-5);
  }

  @media (max-width: 900px) {
    .modal-overlay {
      padding: var(--space-3);
      align-items: flex-end;
    }

    .modal {
      width: 100%;
      max-height: calc(100dvh - 24px);
    }
  }

  /* ==================================================================
     Segmented 6-digit code input
     ================================================================== */
  .code-input {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin: var(--space-2) 0 var(--space-4);
  }

  .code-digit {
    width: 52px;
    height: 64px;
    padding: 0;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 12px;
    caret-color: var(--accent);
    transition: border-color var(--dur-fast) var(--ease-out),
      box-shadow var(--dur-fast) var(--ease-out),
      transform var(--dur-fast) var(--ease-spring);
  }

  .code-digit:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-ring), var(--shadow-glow-soft);
    transform: scale(1.05);
  }

  .code-sep {
    width: 14px;
    height: 2px;
    flex-shrink: 0;
    border-radius: var(--radius-pill);
    background: var(--border-strong);
  }

  .shake {
    animation: shake 400ms var(--ease-out);
  }

  @media (max-width: 560px) {
    .code-input {
      gap: 6px;
    }

    .code-digit {
      width: 42px;
      height: 54px;
      font-size: 1.5rem;
    }

    .code-sep {
      width: 8px;
    }
  }

  /* ==================================================================
     Theme toggle (segmented radiogroup)
     ================================================================== */
  /* Single icon toggle: shows the moon in light theme (→ dark) and the sun
     in dark theme (→ light). Icon swap is driven purely by [data-theme]. */
  .theme-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    min-height: 38px;
    flex-shrink: 0;
    padding: 0;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-input);
    color: var(--text-muted);
    cursor: pointer;
    transition: background var(--dur-fast) var(--ease-out),
      color var(--dur-fast) var(--ease-out),
      border-color var(--dur-fast) var(--ease-out);
  }

  .theme-btn:hover {
    background: var(--surface-2);
    color: var(--text);
    border-color: var(--border-strong);
  }

  .theme-btn .icon {
    width: 18px;
    height: 18px;
  }

  .theme-icon-sun { display: none; }

  :root[data-theme="dark"] .theme-icon-sun { display: block; }
  :root[data-theme="dark"] .theme-icon-moon { display: none; }

  @media (prefers-color-scheme: dark) {
    :root[data-theme="system"] .theme-icon-sun { display: block; }
    :root[data-theme="system"] .theme-icon-moon { display: none; }
  }

  /* ==================================================================
     Code block (fixed dark in both themes)
     ================================================================== */
  .code-block {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: 12px 14px;
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: 12px;
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .code-line {
    flex: 1;
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    line-height: 1.6;
    color: var(--code-text);
    background: none;
    padding: 0;
    white-space: pre;
  }

  .code-block .btn-ghost {
    color: var(--code-muted);
    border-color: rgba(255, 255, 255, 0.14);
    flex-shrink: 0;
  }

  .code-block .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--code-text);
  }

  .code-block .btn-ghost .icon {
    color: inherit;
  }

  /* ==================================================================
     Empty states
     ================================================================== */
  .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-8) var(--space-6);
    text-align: center;
    border: 1.5px dashed var(--border-strong);
    border-radius: var(--radius-card);
  }

  .empty-icon {
    width: 44px;
    height: 44px;
    color: var(--text-faint);
    margin-bottom: var(--space-2);
  }

  .empty-title {
    font-size: var(--fs-lg);
    font-weight: 700;
  }

  .empty-state .muted {
    max-width: 46ch;
  }

  .empty-state .btn {
    margin-top: var(--space-3);
  }

  /* ==================================================================
     Error panel
     ================================================================== */
  .error-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    padding: 12vh var(--space-6) var(--space-8);
    text-align: center;
  }

  .error-code {
    font-size: var(--fs-hero);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.02em;
    background: linear-gradient(160deg, var(--accent-from), var(--accent-to));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .error-message {
    color: var(--text-muted);
    font-size: var(--fs-md);
    max-width: 52ch;
    margin-bottom: var(--space-3);
  }

  /* ==================================================================
     Back link
     ================================================================== */
  .back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: var(--space-4);
    font-size: var(--fs-sm);
    font-weight: 650;
    color: var(--text-muted);
    transition: color var(--dur-fast) var(--ease-out);
  }

  .back-link:hover {
    color: var(--accent-ink);
    text-decoration: none;
  }

  /* ==================================================================
     Logo mark
     ================================================================== */
  .dcms-logo {
    display: block;
    flex-shrink: 0;
    line-height: 0;
  }

  .logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
  }

  /* Theme-swapped official mark: charcoal on light, silver on dark. */
  .logo-on-dark { display: none; }

  :root[data-theme="dark"] .logo-on-light { display: none; }
  :root[data-theme="dark"] .logo-on-dark { display: block; }

  @media (prefers-color-scheme: dark) {
    :root[data-theme="system"] .logo-on-light { display: none; }
    :root[data-theme="system"] .logo-on-dark { display: block; }
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .auth-logo {
    width: 64px;
    height: 64px;
  }

  .hub-logo {
    width: 30px;
    height: 30px;
  }
}