/* ============================================================ тема «Null» ===
   Строгая терминальная TUI: настоящий чёрный фон, моноширинный текст, один
   уровень линий и никаких декоративных поверхностей. */

html[data-theme="zero"] {
  --font-body: ui-monospace, "Cascadia Mono", "Cascadia Code", Consolas,
    "SF Mono", "Roboto Mono", monospace;
  --font-display: var(--font-body);
  --font-title: var(--font-body);
  --font-numeric: var(--font-body);
  --display-weight: 500;
  --display-spacing: 0;
  --title-weight: 500;
  --label-spacing: 0.04em;

  --radius-lg: 0;
  --radius-md: 0;
  --radius-sm: 0;
  --radius-chip: 0;
  --rail-width: 1px;

  --bg: #000;
  --surface-1: #000;
  --surface-2: #080808;
  --surface-3: #111;
  --sunken: #000;

  --line: #2f2f2f;
  --line-strong: #777;

  --card-bg: #000;
  --card-bg-open: #080808;
  --card-texture: none;
  --card-border: #2f2f2f;
  --card-border-open: #777;
  --card-shadow: none;

  --plate-bg: #000;
  --plate-texture: none;
  --plate-shadow: none;
  --turn-shadow: none;

  --text: #e6e6e6;
  --text-soft: #c8c8c8;
  --text-muted: #8a8a8a;
  --text-faint: #5f5f5f;

  --accent: #fff;
  --accent-soft: #101010;
  --accent-line: #bdbdbd;
  --accent-glow: none;
  --selection: #3d3d3d;
  --brand-gradient: none;
  --brand-shadow: none;

  --provider-none: #737373;
  --provider-codex: #d8d8d8;
  --provider-claude: #949494;
  --provider-tone-lightness: 0.74;
  --provider-tone-chroma: 0.01;
  --provider-tone-alpha: 0.16;
  --ok: #d8d8d8;
  --pending: #9a9a9a;

  --dot-input: #d8d8d8;
  --dot-cache: #b0b0b0;
  --dot-output: #858585;
  --dot-think: #5f5f5f;

  --space-glow-a: transparent;
  --space-glow-b: transparent;
  --space-base: #000;
  --space-star: transparent;
  --star-opacity: 0;
  --decor-opacity: 0;

  --shell-header-background: #000;
  --shell-header-border: 1px solid var(--line);
  --shell-header-gap: 0.55rem;
  --shell-header-height: 3.35rem;
  --shell-header-padding-left: clamp(0.65rem, 1.2vw, 1.1rem);
  --shell-header-padding-right: clamp(0.65rem, 1.2vw, 1.1rem);
  --shell-header-rule: none;
  --shell-header-rule-opacity: 0;
  --shell-header-shadow: none;
  --shell-control-background: transparent;
  --shell-control-border: 1px solid var(--line);
  --shell-control-shadow: none;
  --shell-view-switch-background: transparent;
  --shell-view-switch-border: 0;
  --shell-view-switch-radius: 0;
  --shell-view-switch-shadow: none;
  --shell-view-switch-gap: 0.15rem;
  --shell-view-switch-padding: 0;
  --shell-tab-border: 0;
  --shell-tab-active-background: transparent;
  --shell-tab-active-border: 0;
  --shell-tab-active-shadow: inset 0 -1px 0 var(--accent);
  --shell-workspace-padding-top: 0;
  --shell-panel-border: 1px solid var(--line);
  --shell-panel-border-image: none;
  --shell-stream-tabs-background: #000;
  --shell-stream-tabs-border: 0;
  --shell-stream-tabs-border-bottom: 1px solid var(--line);
  --shell-stream-tabs-border-image: none;
  --shell-stream-tabs-padding: 0;
  --shell-stream-tabs-min-height: 3.35rem;
  --shell-stream-tab-background: transparent;
  --shell-stream-tab-border: 0;
  --shell-stream-tab-hover-background: #080808;
  --shell-stream-tab-active-background: transparent;
  --shell-stream-card-background: transparent;
  --shell-stream-card-border: 0;
  --shell-stream-card-border-image: none;
  --shell-stream-card-shadow: none;
}

html[data-theme="zero"] body,
html[data-theme="zero"] .app-header {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: #000;
}

html[data-theme="zero"] body::before,
html[data-theme="zero"] body::after,
html[data-theme="zero"] .app-header::after {
  content: none;
}

html[data-theme="zero"] .theme-atmosphere {
  display: none;
}

html[data-background-override="true"][data-background="zero"] {
  --hub-background-color: #000;
  --hub-background-image: none;
}

html[data-theme="zero"] :focus-visible {
  border-radius: 0;
  outline: 1px solid var(--accent);
  outline-offset: 1px;
}

html[data-theme="zero"] * {
  scrollbar-color: var(--line-strong) #000;
}

html[data-theme="zero"] *::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 0;
}

html[data-theme="zero"] *::-webkit-scrollbar-track {
  background: #000;
}

html[data-theme="zero"] .task-rail,
html[data-theme="zero"] .chat,
html[data-theme="zero"] .activity-rail,
html[data-theme="zero"] .stream-tabs,
html[data-theme="zero"] .composer {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: #000;
  box-shadow: none;
}

html[data-theme="zero"] .view-tab,
html[data-theme="zero"] .view-settings,
html[data-theme="zero"] .icon-button,
html[data-theme="zero"] .chip-button,
html[data-theme="zero"] .option-chip,
html[data-theme="zero"] .composer-send,
html[data-theme="zero"] .composer-attach {
  background: transparent;
  border-color: transparent;
  border-radius: 0;
  box-shadow: none;
  color: var(--text-muted);
}

html[data-theme="zero"] .view-tab:hover,
html[data-theme="zero"] .view-settings:hover,
html[data-theme="zero"] .icon-button:hover,
html[data-theme="zero"] .chip-button:hover,
html[data-theme="zero"] .option-chip:hover,
html[data-theme="zero"] .composer-send:hover:not(:disabled),
html[data-theme="zero"] .composer-attach:hover {
  background: #080808;
  border-color: var(--line-strong);
  color: var(--text);
}

html[data-theme="zero"] .view-tab[aria-pressed="true"],
html[data-theme="zero"] .option-chip[aria-pressed="true"] {
  background: transparent;
  color: var(--accent);
}

html[data-theme="zero"] .task-rail-head,
html[data-theme="zero"] .activity-rail-head {
  border-bottom: 1px solid var(--line);
}

html[data-theme="zero"] .task-rail-title,
html[data-theme="zero"] .activity-rail-toggle,
html[data-theme="zero"] .workspace-task-panel > header strong {
  color: var(--text-soft);
  font-weight: 500;
  letter-spacing: var(--label-spacing);
}

html[data-theme="zero"] .task-count {
  background: transparent;
  color: var(--text-faint);
  padding-inline: 0.2rem;
}

html[data-theme="zero"] .task-search {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  margin-bottom: 0.35rem;
  padding-inline: 0;
}

html[data-theme="zero"] .task-search:focus-within {
  border-bottom-color: var(--accent);
}

html[data-theme="zero"] .task-workspace-item {
  background: transparent;
  border: 0;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  box-shadow: none;
  margin: 0;
  min-height: 2.35rem;
  padding-inline: 0.55rem;
}

html[data-theme="zero"] .task-workspace-item:hover,
html[data-theme="zero"] .task-workspace-item:focus-visible {
  background: #080808;
  border-bottom-color: var(--line);
}

html[data-theme="zero"] .task-workspace-item[data-selected] {
  background: transparent;
  border-bottom-color: var(--accent);
  box-shadow: inset 1px 0 0 var(--accent);
}

html[data-theme="zero"] .task-workspace-name {
  font-weight: 400;
}

html[data-theme="zero"] .stream-tab-name,
html[data-theme="zero"] .activity-stream-name,
html[data-theme="zero"] .workspace-task-title,
html[data-theme="zero"] .msg-body strong,
html[data-theme="zero"] .msg-reasoning strong {
  font-weight: 500;
}

html[data-theme="zero"] .activity-stream-list {
  gap: 0;
  padding-inline: 0.55rem;
}

html[data-theme="zero"] .activity-stream-item {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  box-shadow: none;
}

html[data-theme="zero"] .activity-stream-item[data-current] {
  background: transparent;
  border-bottom-color: var(--accent);
}

html[data-theme="zero"] .workspace-task-panel {
  border-top-color: var(--line);
}

html[data-theme="zero"] .stream-tabs {
  gap: 0;
}

html[data-theme="zero"] .stream-tab {
  border-right: 1px solid var(--line);
  border-radius: 0;
  color: var(--text-muted);
}

html[data-theme="zero"] .stream-tab[aria-pressed="true"] {
  box-shadow: inset 0 -1px 0 var(--accent);
  color: var(--text);
}

html[data-theme="zero"] .stream-tab-card {
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

html[data-theme="zero"] .stream-tab-create .stream-tab-card {
  border: 0;
}

html[data-theme="zero"] .stream-tab-create-mark {
  color: var(--text-muted);
}

html[data-theme="zero"] .chat-overlay-actions > .chip-button {
  background: #000;
  border: 1px solid transparent;
}

html[data-theme="zero"] .chat-log {
  gap: 0.35rem;
}

html[data-theme="zero"] .msg,
html[data-theme="zero"] .msg-user,
html[data-theme="zero"] .msg-agent,
html[data-theme="zero"] .msg-live,
html[data-theme="zero"] .msg-system {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

html[data-theme="zero"] .msg {
  max-width: min(52rem, 94%);
  padding: 0.45rem 0.65rem;
}

html[data-theme="zero"] .msg-user {
  border-left: 1px solid var(--line-strong);
}

html[data-theme="zero"] .msg-live {
  border-left: 1px dashed var(--accent);
}

html[data-theme="zero"] .msg-system {
  border-bottom: 1px dashed var(--line);
  color: var(--text-faint);
  max-width: min(52rem, 94%);
  width: 100%;
}

html[data-theme="zero"] .msg-head {
  margin-bottom: 0.2rem;
}

html[data-theme="zero"] .msg-author,
html[data-theme="zero"] .msg-stage {
  color: var(--text-soft);
  font-weight: 400;
}

html[data-theme="zero"] .msg-body {
  font-size: 0.84rem;
  font-weight: 400;
  line-height: 1.48;
}

html[data-theme="zero"] .msg-reasoning,
html[data-theme="zero"] .msg-body blockquote,
html[data-theme="zero"] .msg-reasoning blockquote {
  border-left: 1px solid var(--line-strong);
}

html[data-theme="zero"] .msg-body code,
html[data-theme="zero"] .msg-reasoning code,
html[data-theme="zero"] .msg-body pre,
html[data-theme="zero"] .msg-reasoning pre {
  background: transparent;
  border-color: var(--line);
  border-radius: 0;
  box-shadow: none;
}

html[data-theme="zero"] .composer {
  gap: 0.25rem;
  padding-block: 0.4rem;
}

html[data-theme="zero"] .composer-input {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  box-shadow: none;
}

html[data-theme="zero"] .composer-input:focus-within {
  border-bottom-color: var(--accent);
  box-shadow: none;
}

html[data-theme="zero"] .composer-input > textarea {
  font-family: var(--font-body);
}

html[data-theme="zero"] .composer-send {
  border: 1px solid var(--line);
}

html[data-theme="zero"] .composer-send:hover:not(:disabled) {
  border-color: var(--accent);
}

html[data-theme="zero"] .annotation,
html[data-theme="zero"] .attachment,
html[data-theme="zero"] .attachment-file-type,
html[data-theme="zero"] .task-new-menu,
html[data-theme="zero"] .stream-context-menu {
  background: #000;
  border-color: var(--line-strong);
  border-radius: 0;
  box-shadow: none;
}

@media (max-width: 720px) {
  html[data-theme="zero"] {
    --shell-header-height: 3.25rem;
  }

  html[data-theme="zero"] .msg {
    max-width: 100%;
    padding-inline: 0.5rem;
  }
}