@layer base, components, utilities;

@layer base {
  :root {
    color-scheme: light dark;

    --text-color-light: rgba(0, 0, 0, 0.87);
    --text-color-dark: #ffffff;
    --selected-text-color-light: #d42a20;
    --selected-text-color-dark: #ff6b63;
    --valid-color-light: #188038;
    --valid-color-dark: #4ade80;
    --text-placeholder-color-light: rgba(0, 0, 0, 0.65);
    --text-placeholder-color-dark: rgba(255, 255, 255, 0.72);
    --text-link-color-light: #0060c7;
    --text-link-color-dark: #58a6ff;
    --background-color-light: #ffffff;
    --background-color-dark: #111111;
    --surface-color-light: #f8f8f8;
    --surface-color-dark: #191919;
    --divider-color-light: rgba(0, 0, 0, 0.16);
    --divider-color-dark: rgba(255, 255, 255, 0.18);
    --control-border-light: #757575;
    --control-border-dark: #8c8c8c;

    --text-color: var(--text-color-light);
    --selected-text-color: var(--selected-text-color-light);
    --valid-color: var(--valid-color-light);
    --text-placeholder-color: var(--text-placeholder-color-light);
    --text-link-color: var(--text-link-color-light);
    --background-color: var(--background-color-light);
    --surface-color: var(--surface-color-light);
    --divider-color: var(--divider-color-light);
    --control-border-color: var(--control-border-light);

    @media (prefers-color-scheme: dark) {
      --text-color: var(--text-color-dark);
      --selected-text-color: var(--selected-text-color-dark);
      --valid-color: var(--valid-color-dark);
      --text-placeholder-color: var(--text-placeholder-color-dark);
      --text-link-color: var(--text-link-color-dark);
      --background-color: var(--background-color-dark);
      --surface-color: var(--surface-color-dark);
      --divider-color: var(--divider-color-dark);
      --control-border-color: var(--control-border-dark);
    }

    @supports (color: light-dark(white, black)) {
      --text-color: light-dark(var(--text-color-light), var(--text-color-dark));
      --selected-text-color: light-dark(var(--selected-text-color-light), var(--selected-text-color-dark));
      --valid-color: light-dark(var(--valid-color-light), var(--valid-color-dark));
      --text-placeholder-color: light-dark(var(--text-placeholder-color-light), var(--text-placeholder-color-dark));
      --text-link-color: light-dark(var(--text-link-color-light), var(--text-link-color-dark));
      --background-color: light-dark(var(--background-color-light), var(--background-color-dark));
      --surface-color: light-dark(var(--surface-color-light), var(--surface-color-dark));
      --divider-color: light-dark(var(--divider-color-light), var(--divider-color-dark));
      --control-border-color: light-dark(var(--control-border-light), var(--control-border-dark));
    }

    accent-color: var(--selected-text-color);
  }

  :where(html, body, header, main, footer, section, article, search, details, summary, form, fieldset, legend, div, p, pre, code, ol, ul, li, input, select, textarea, button, progress, a) {
    box-sizing: border-box;
  }

  body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
  }

  a {
    color: var(--text-link-color);
    text-decoration: none;
  }

  a:hover {
    text-decoration: underline;
  }

  code, pre {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  }

  h1 {
    font-weight: 400;
    font-size: 1.55rem;
    margin: 0;
    letter-spacing: -0.01em;
  }

  h2 {
    font-weight: 500;
    font-size: 1.05rem;
    margin: 0;
  }

  h2:focus {
    outline: none;
  }

  h3 {
    font-weight: 500;
    font-size: 0.95rem;
    margin: 0.75rem 0 0.35rem;
  }

  :where(a:any-link, button, summary, input, select, textarea, pre):focus-visible {
    outline: 2px solid var(--selected-text-color);
    outline-offset: 2px;
  }
}

@layer components {
  .skip-link {
    position: fixed;
    inset-block-start: 0.75rem;
    inset-inline-start: 0.75rem;
    z-index: 100;
    padding: 0.5rem 0.85rem;
    background-color: var(--text-color);
    color: var(--background-color);
    border-radius: 3px;
    font-weight: 500;
  }

  .editor-container {
    width: 100%;
    max-width: 45em;
    margin-inline: auto;
    padding-inline: 6vmin;
  }

  .site-header {
    padding-block: 2rem 0.75rem;
  }

  .title-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
  }

  .caption {
    color: var(--text-placeholder-color);
    font-size: 0.85rem;
    margin-block: 0.2rem 0;
  }

  .section-bar {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
    margin-block: 0.75rem 0.5rem;
  }

  .workflow-heading {
    margin-block-start: 1.5rem;
  }

  /* itty.bitty.site/edit inputrow underline architecture */
  .filter-sheet {
    display: block;
    margin-block-end: 1.25rem;
  }

  .filter-bar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
  }

  .lang-reminder {
    margin-block: -0.5rem 1.25rem;
  }

  @media (max-width: 560px) {
    .filter-bar {
      grid-template-columns: 1fr;
      gap: 0;
    }
  }

  .field-group {
    margin-block-end: 0.5rem;
  }

  .field-hint {
    display: block;
    font-size: 0.8rem;
    color: var(--text-placeholder-color);
    margin-block-end: 0.15rem;
  }

  .error-msg {
    display: none;
    color: var(--selected-text-color);
    font-size: 0.82rem;
    font-weight: 500;
    margin-block-start: 0.2rem;
  }

  .inputrow {
    padding-block: 0.35em;
    border-block-end: 1px solid var(--control-border-color);
    display: flex;
    align-items: baseline;
    margin-block-end: 0.35em;
  }

  .inputrow:focus-within {
    border-block-end: 2px solid var(--text-color);
    padding-block-end: calc(0.35em - 1px);
  }

  .inputrow > label:first-child {
    min-inline-size: 5.25em;
    display: block;
    margin-inline-end: 0.75em;
    user-select: none;
    font-size: 0.88rem;
    color: var(--text-placeholder-color);
    transition: color 0.15s ease;
  }

  .filter-cell > label:first-child {
    min-inline-size: 4.5em;
  }

  .inputrow:focus-within > label:first-child {
    color: var(--text-color);
    font-weight: 500;
  }

  .inputrow > :where(input, select) {
    flex: 1 1 auto;
    min-inline-size: 0;
    border: none;
    background: transparent;
    color: var(--text-color);
    font: inherit;
    font-size: 1rem;
    padding-block: 0.25rem;
    min-block-size: 2.5rem;
  }

  .inputrow > select option {
    background-color: var(--background-color);
    color: var(--text-color);
  }

  .inputrow > :where(input, select):focus,
  .inputblock > textarea:focus {
    outline: none;
  }

  .inputrow > :where(input, select):focus-visible,
  .inputblock > textarea:focus-visible {
    outline: none;
  }

  ::placeholder {
    color: var(--text-placeholder-color);
  }

  .inputblock {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-block-start: 0.5rem;
    padding-block-end: 0.35rem;
    border-block-end: 1px solid var(--control-border-color);
  }

  .inputblock:focus-within {
    border-block-end: 2px solid var(--text-color);
    padding-block-end: calc(0.35rem - 1px);
  }

  .inputblock > label {
    font-size: 0.88rem;
    color: var(--text-placeholder-color);
    user-select: none;
  }

  .inputblock:focus-within > label {
    color: var(--text-color);
    font-weight: 500;
  }

  .inputblock > textarea {
    inline-size: 100%;
    border: none;
    background: transparent;
    color: var(--text-color);
    font: inherit;
    font-size: 1rem;
    resize: vertical;
    padding-block: 0.25rem;
  }

  /* Post-interaction validation (:user-invalid / :user-valid + :has() parent styling) */
  .field-group:has(:where(:user-invalid, .user-invalid-fallback)) :where(.inputrow, .inputblock),
  .field-group.has-error-fallback :where(.inputrow, .inputblock) {
    border-block-end: 2px solid var(--selected-text-color);
  }

  .field-group:has(:where(:user-invalid, .user-invalid-fallback)) label,
  .field-group.has-error-fallback label {
    color: var(--selected-text-color);
    font-weight: 600;
  }

  .field-group:has(:where(:user-invalid, .user-invalid-fallback)) .error-msg,
  .field-group.has-error-fallback .error-msg {
    display: block;
  }

  .field-group:has(:where(:user-valid, .user-valid-fallback)) :where(.inputrow, .inputblock) {
    border-block-end-color: var(--valid-color);
  }

  /* itty.bitty.site/edit menu-item buttons & links */
  .menu-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    background: transparent;
    border: 1px solid var(--control-border-color);
    padding: 0.35em 0.75em;
    min-block-size: 2.4rem;
    min-inline-size: 2.4rem;
    border-radius: 3px;
    font: inherit;
    font-size: 0.86rem;
    cursor: pointer;
    user-select: none;
    text-decoration: none;
    transition: background-color 0.12s ease, color 0.12s ease, border-color 0.12s ease;
  }

  .menu-item:where(:hover, :active):not(:disabled) {
    background-color: var(--text-color);
    color: var(--background-color);
    border-color: var(--text-color);
    text-decoration: none;
  }

  .menu-item:disabled {
    opacity: 0.55;
    cursor: not-allowed;
  }

  .btn-solid {
    background-color: var(--text-color);
    color: var(--background-color);
    border-color: var(--text-color);
    font-weight: 500;
  }

  .btn-solid:where(:hover, :active):not(:disabled) {
    background-color: var(--selected-text-color);
    border-color: var(--selected-text-color);
    color: #ffffff;
  }

  @media (pointer: coarse) {
    .menu-item,
    .inputrow > :where(input, select) {
      min-block-size: 3rem;
    }
  }

  /* Clean minimalist node rows */
  .nodes-list {
    display: flex;
    flex-direction: column;
    border-block-start: 1px solid var(--divider-color);
  }

  .node-card {
    padding-block: 1rem;
    border-block-end: 1px solid var(--divider-color);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .node-top {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-placeholder-color);
  }

  .node-code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    color: var(--text-color);
    font-weight: 500;
  }

  .status-pill {
    font-size: 0.76rem;
    letter-spacing: 0.02em;
  }

  .status-active {
    color: var(--text-color);
    font-weight: 600;
  }

  .status-active::before {
    content: "● ";
    content: "● " / "";
    color: var(--valid-color);
  }

  .status-pending_notebook {
    color: var(--text-placeholder-color);
  }

  .status-pending_notebook::before {
    content: "○ ";
    content: "○ " / "";
  }

  .node-title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 500;
  }

  .node-title a {
    color: var(--text-color);
  }

  .node-title a:hover {
    color: var(--text-link-color);
    text-decoration: underline;
  }

  .node-meta {
    font-size: 0.82rem;
    color: var(--text-placeholder-color);
  }

  .node-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-block-start: 0.2rem;
  }

  .empty-state {
    padding-block: 2rem;
    color: var(--text-placeholder-color);
    font-size: 0.92rem;
  }

  /* Footer with controller/erasure details & collapsible drawers */
  .site-footer {
    margin-block-start: 3rem;
    padding-block: 1.25rem 3rem;
    border-block-start: 1px solid var(--divider-color);
    font-size: 0.84rem;
    color: var(--text-placeholder-color);
  }

  .footer-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
    margin-block-end: 0.85rem;
  }

  .footer-meta strong {
    color: var(--text-color);
    font-weight: 500;
  }

  .sep {
    opacity: 0.6;
  }

  .footer-drawers {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-block: 0.75rem;
  }

  .footer-details {
    border-block-end: 1px solid var(--divider-color);
    padding-block-end: 0.5rem;
  }

  .footer-details > summary {
    list-style: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
  }

  .footer-details > summary::-webkit-details-marker {
    display: none;
  }

  .footer-details > summary::before {
    content: "+";
    content: "+" / "";
    font-family: ui-monospace, SFMono-Regular, monospace;
    font-weight: 600;
  }

  .footer-details[open] > summary {
    background-color: var(--text-color);
    color: var(--background-color);
    border-color: var(--text-color);
  }

  .footer-details[open] > summary::before {
    content: "−";
    content: "−" / "";
  }

  .drawer-content {
    margin-block-start: 0.75rem;
    padding: 1rem;
    background-color: var(--surface-color);
    border: 2px solid var(--text-color);
    box-shadow: 2px 1px var(--text-color);
    color: var(--text-color);
  }

  .drawer-subheading {
    margin-block: 0.75rem 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
  }

  .erasure-callout {
    padding-block-end: 0.75rem;
    margin-block-end: 0.75rem;
    border-block-end: 1px solid var(--divider-color);
    font-size: 0.85rem;
  }

  .erasure-callout p {
    margin: 0;
  }

  .disclaimer-pre {
    white-space: pre-wrap;
    font-family: inherit;
    font-size: 0.82rem;
    color: var(--text-color);
    margin: 0;
    max-block-size: 18rem;
    overflow-y: auto;
  }

  .form-actions {
    margin-block-start: 0.85rem;
  }

  .footer-telemetry {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    margin-block: 1rem 0;
    font-size: 0.76rem;
    color: var(--text-placeholder-color);
  }

  .footer-telemetry strong {
    color: var(--text-color);
    font-weight: 500;
  }

  .receipt-box {
    margin-block-start: 0.85rem;
    padding: 0.75rem;
    background-color: var(--background-color);
    border: 1px solid var(--control-border-color);
    font-size: 0.82rem;
    white-space: pre-wrap;
  }

  .banner-ok {
    margin-block: 0.75rem;
    padding: 0.75rem 1rem;
    border: 2px solid var(--text-color);
    box-shadow: 2px 1px var(--text-color);
    background-color: var(--surface-color);
    font-size: 0.88rem;
  }

  .inline-form {
    display: inline;
    margin: 0;
  }

  .workflow-list {
    padding-inline-start: 1.25rem;
    font-size: 0.9rem;
    margin-block: 0.5rem 1rem;
  }

  .workflow-list li {
    margin-block-end: 0.45rem;
  }

  /* Inline Node Chat & Progressive Ex Parte Workspace Drawer */
  .node-chat-drawer {
    margin-block-start: 0.4rem;
  }

  .chat-drawer-inner {
    padding: 0.9rem;
    background-color: var(--surface-color);
    border: 2px solid var(--text-color);
    box-shadow: 2px 1px var(--text-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
  }

  .chat-drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    padding-block-end: 0.45rem;
    border-block-end: 1px solid var(--divider-color);
  }

  .chat-mode-pill {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.78rem;
    font-weight: 600;
  }

  .chat-mode-unlocked {
    color: var(--valid-color);
  }

  .chat-close-btn {
    padding: 0.2rem 0.6rem;
    min-block-size: 2rem;
    font-size: 0.8rem;
  }

  .workspace-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
  }

  .workspace-tab-panel {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
  }

  .chat-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .chat-chip {
    justify-content: flex-start;
    text-align: left;
    font-size: 0.8rem;
    line-height: 1.35;
    padding: 0.35rem 0.65rem;
  }

  .chat-log {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    max-block-size: 22rem;
    overflow-y: auto;
  }

  .chat-log:empty {
    display: none;
  }

  .chat-msg {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--divider-color);
    background-color: var(--background-color);
    border-radius: 3px;
    font-size: 0.88rem;
  }

  .chat-msg-user {
    border-inline-start: 3px solid var(--text-color);
  }

  .chat-msg-assistant {
    border-inline-start: 3px solid var(--text-link-color);
  }

  .chat-msg-workspace {
    border-inline-start: 3px solid var(--valid-color);
  }

  .chat-msg-rate {
    border-inline-start: 3px solid var(--selected-text-color);
  }

  .chat-msg-top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.4rem;
    margin-block-end: 0.3rem;
  }

  .chat-role-label {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-placeholder-color);
  }

  .statutory-badge {
    font-size: 0.73rem;
    padding: 0.1rem 0.45rem;
    border: 1px solid var(--control-border-color);
    border-radius: 2px;
    color: var(--text-placeholder-color);
  }

  .chat-prose-p {
    margin: 0.25rem 0;
  }

  .chat-prose-list {
    margin: 0.25rem 0;
    padding-inline-start: 1.2rem;
  }

  .chat-prose-list li {
    margin-block-end: 0.2rem;
  }

  .chat-citations {
    margin-block-start: 0.5rem;
    padding-block-start: 0.45rem;
    border-block-start: 1px solid var(--divider-color);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
  }

  .citation-chip {
    font-size: 0.8rem;
  }

  .citation-summary {
    cursor: pointer;
    font-weight: 500;
    color: var(--text-link-color);
  }

  .citation-body {
    margin-block-start: 0.25rem;
    padding: 0.45rem 0.6rem;
    background-color: var(--surface-color);
    border-inline-start: 2px solid var(--control-border-color);
  }

  .citation-snippet {
    margin: 0 0 0.25rem;
    font-size: 0.8rem;
  }

  .verify-nb-link {
    align-self: flex-start;
    font-size: 0.8rem;
    font-weight: 500;
  }

  .chat-input-form {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    padding-block-end: 0.25rem;
    border-block-end: 1px solid var(--control-border-color);
  }

  .chat-input-form:focus-within {
    border-block-end: 2px solid var(--text-color);
    padding-block-end: calc(0.25rem - 1px);
  }

  .chat-textarea {
    flex: 1 1 auto;
    min-inline-size: 0;
    border: none;
    background: transparent;
    color: var(--text-color);
    font: inherit;
    font-size: 0.95rem;
    line-height: 1.4;
    padding-block: 0.35rem;
    min-block-size: 2.4rem;
    max-block-size: 8rem;
    resize: vertical;
  }

  .chat-textarea:focus,
  .chat-textarea:focus-visible {
    outline: none;
  }

  .chat-footer-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
  }

  .chat-unlock-trigger {
    font-size: 0.8rem;
    padding: 0.25rem 0.6rem;
    min-block-size: 2.1rem;
  }

  .unlock-panel {
    padding: 0.75rem;
    border: 1px solid var(--control-border-color);
    background-color: var(--background-color);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
  }

  .unlock-heading {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
  }

  .unlock-choices {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
  }

  @media (max-width: 600px) {
    .unlock-choices {
      grid-template-columns: 1fr;
    }
  }

  .unlock-choice-card {
    padding: 0.65rem;
    border: 1px solid var(--divider-color);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    font-size: 0.85rem;
  }

  .pass-token-form,
  .byok-form {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-block-start: 0.25rem;
  }

  .sponsor-card {
    padding: 0.75rem;
    border: 2px solid var(--text-color);
    background-color: var(--surface-color);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.45rem;
  }

  .sponsor-title {
    margin: 0;
    font-weight: 600;
    font-size: 0.92rem;
  }

  .sponsor-progress {
    inline-size: 100%;
    block-size: 0.6rem;
  }

  .hitl-vote-box {
    margin-block-start: 0.5rem;
    padding-block-start: 0.5rem;
    border-block-start: 1px solid var(--divider-color);
  }

  .hitl-prompt {
    margin: 0 0 0.25rem;
    font-weight: 500;
    font-size: 0.84rem;
  }

  .chat-inline-actions {
    margin-block-start: 0.5rem;
  }

  .profile-fieldset {
    border: 1px solid var(--divider-color);
    padding: 0.45rem 0.65rem;
    margin: 0;
  }

  .profile-radios {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.84rem;
  }

  .profile-radio-label {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    cursor: pointer;
  }

  .schedule-preview {
    max-block-size: 18rem;
    overflow-y: auto;
    margin-block-start: 0.25rem;
  }

  .byok-details {
    padding-block-start: 0.35rem;
    border-block-start: 1px solid var(--divider-color);
  }

  .byok-details > summary {
    cursor: pointer;
  }

  @media (pointer: coarse) {
    .chat-chip,
    .chat-close-btn,
    .chat-unlock-trigger,
    .profile-radio-label {
      min-block-size: 3rem;
    }
  }

  @media (forced-colors: active) {
    .drawer-content,
    .chat-drawer-inner,
    .sponsor-card,
    .banner-ok {
      border: 2px solid CanvasText;
    }

    .menu-item {
      border: 1px solid ButtonText;
    }

    .inputrow,
    .inputblock {
      border-block-end-color: CanvasText;
    }
  }
}

@layer utilities {
  /* Canonical visually-hidden utility with :focus-within / :active opt-out for skip links */
  .visually-hidden:where(:not(:focus-within, :active)) {
    position: absolute !important;
    clip-path: inset(50%) !important;
    overflow: hidden !important;
    width: 1px !important;
    height: 1px !important;
    margin: -1px !important;
    padding: 0 !important;
    border: 0 !important;
    white-space: nowrap !important;
  }

  .hidden {
    display: none !important;
  }
}