/* 02-layout.css — app shell, sidebar, workspace */
/* === App Layout === */
.app {
  display: flex;
  flex-direction: column;
  height: 100%;
  height: 100dvh;
  min-height: -webkit-fill-available;
  width: 100%;
  overflow: hidden;
}

.app-workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.workspace-main {
  display: flex;
  flex-direction: row;
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

/* === Topbar === */
.app-topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  height: 46px;
  min-height: 46px;
  background: var(--topbar-background);
  border-bottom: 1px solid var(--topbar-border);
  flex-shrink: 0;
  z-index: 50;
  overflow: hidden;
}
.app-topbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.app-topbar-brand strong {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-primary);
}
.app-topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  min-width: 0;
  flex: 1 1 auto;
  justify-content: flex-end;
  overflow: hidden;
}

/* Agent tabs in topbar */
.agent-tabs,
.mode-tabs {
  display: flex;
  flex-shrink: 0;
  gap: var(--segmented-control-group-gap);
  padding: var(--segmented-control-group-padding);
  border: 1px solid rgba(56, 56, 56, 0.22);
  border-radius: var(--segmented-control-group-radius);
  background: var(--segmented-control-group-background);
  box-shadow: none;
  overflow: hidden;
}
.agent-tab,
.mode-tab {
  appearance: none;
  border: none;
  border-radius: var(--segmented-control-item-radius);
  background: var(--segmented-control-item-background);
  color: var(--segmented-control-item-color);
  box-shadow: none;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}
.agent-tab:hover,
.mode-tab:hover {
  background: var(--segmented-control-item-hover-background);
  color: var(--segmented-control-item-hover-color);
}
.agent-tab.active,
.mode-tab.active {
  color: var(--segmented-control-item-active-color);
  box-shadow: none;
}
.agent-tab {
  color: var(--segmented-control-item-color);
  font-family: var(--font-mono);
  font-size: var(--btn-md-font);
  font-weight: 700;
  text-transform: none;
  letter-spacing: var(--btn-letter-spacing);
  min-height: var(--btn-md-min-h);
  /* Slightly tighter than base btn pad — three agent tabs (Claude/Codex/Pi) fit without crowding cwd. */
  padding: var(--btn-md-pad-y) max(6px, calc(var(--btn-md-pad-x) - 2px));
  white-space: nowrap;
}
.agent-tab.active {
  background: var(--segmented-control-item-active-background);
}

/* Mode tabs in topbar */
.mode-tab {
  font-family: var(--font-mono);
  font-size: var(--btn-sm-font);
  font-weight: 700;
  text-transform: none;
  letter-spacing: var(--btn-letter-spacing);
  min-height: var(--btn-sm-min-h);
  padding: var(--btn-sm-pad-y) var(--btn-sm-pad-x);
  white-space: nowrap;
}
.mode-tab.active {
  background: var(--segmented-control-item-alt-active-background);
}

/* Shared compact control base (close/back/icon/small controls) */
:where(
  .topbar-icon-btn,
  .settings-back,
  .settings-panel h3 .settings-close,
  .settings-header .settings-close,
  .modal-close-btn,
  .attachment-chip-remove
) {
  appearance: none;
  border: var(--compact-control-border);
  border-radius: var(--compact-control-radius);
  background: var(--compact-control-background);
  color: var(--compact-control-color);
  cursor: pointer;
  line-height: 1;
  transition: background 140ms, color 140ms, transform 140ms, box-shadow 140ms, border-color 140ms;
}

:where(
  .topbar-icon-btn,
  .settings-back,
  .settings-panel h3 .settings-close,
  .settings-header .settings-close,
  .modal-close-btn,
  .attachment-chip-remove
):hover {
  background: var(--compact-control-hover-background);
  color: var(--compact-control-hover-color);
  transform: translate(var(--compact-control-hover-shift, 0), var(--compact-control-hover-shift, 0));
  box-shadow: none;
}

/* Topbar icon buttons */
.topbar-icon-btn {
  width: var(--btn-icon-size);
  height: var(--btn-icon-size);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: none;
  padding: 0;
  flex-shrink: 0;
  transition: background 140ms, color 140ms, transform 140ms, box-shadow 140ms, border-color 140ms;
}

.topbar-icon-btn:active {
  box-shadow: none;
}

.session-loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--loading-overlay-scrim);
}

.session-loading-card {
  width: min(440px, 100%);
  padding: 24px 24px 20px;
  border: 1px solid var(--loading-card-border);
  border-radius: var(--radius-nav);
  background: var(--loading-card-bg);
  box-shadow: none;
}

.session-loading-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 74px;
  margin-bottom: 12px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-nav);
  background: var(--loading-badge-bg);
  color: var(--loading-badge-text);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: none;
}

.session-loading-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0.04em;
  color: var(--text-primary);
}

.session-loading-label {
  margin-top: 8px;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.7;
}

.session-loading-bar {
  margin-top: 18px;
  height: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-nav);
  background: var(--loading-bar-bg);
}

.session-loading-bar-fill {
  display: block;
  width: 44%;
  height: 100%;
  background: var(--loading-bar-fill);
  animation: session-loading-pulse 1.2s ease-in-out infinite;
  transform-origin: left center;
}

@keyframes session-loading-pulse {
  0% {
    transform: translateX(-55%) scaleX(0.82);
    opacity: 0.72;
  }
  50% {
    transform: translateX(120%) scaleX(1.08);
    opacity: 1;
  }
  100% {
    transform: translateX(250%) scaleX(0.88);
    opacity: 0.72;
  }
}

/* === Sidebar === */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--sidebar-background);
  border-right: 1px solid var(--sidebar-border);
  display: flex;
  flex-direction: column;
  transition: transform 200ms ease;
  overflow: hidden;
}
/* === Sidebar Resizer === */
.sidebar-resizer {
  width: 4px;
  cursor: col-resize;
  background: transparent;
  flex-shrink: 0;
  transition: background 120ms;
}
.sidebar-resizer:hover {
  background: var(--line);
}

/* === Chat Main === */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  position: relative;
  background: var(--chat-background);
}
.chat-header {
  min-height: 40px;
  height: auto;
  display: flex;
  align-items: center;
  padding: 6px 12px;
  border-bottom: 1px solid var(--chat-header-border);
  background: var(--chat-header-background);
  gap: 8px;
  flex-shrink: 0;
  position: relative;
  overflow: visible;
}
.app-status-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
  z-index: 15;
}
.app-status-banner[hidden] {
  display: none !important;
}
.app-status-banner.is-error {
  background: #ffe3e3;
  color: var(--danger);
}
.app-status-banner.is-warn {
  background: #fff6cc;
  color: #8a6d00;
}
.app-status-banner.is-info {
  background: #e7f4ff;
  color: var(--blue-strong);
}
.app-status-banner.is-success {
  background: #e5f7ee;
  color: var(--success);
}
.app-status-banner-text {
  flex: 1;
  min-width: 0;
  line-height: 1.35;
}
.app-status-banner-action {
  flex-shrink: 0;
  padding: 4px 10px;
  border: 1px solid currentColor;
  border-radius: var(--radius-nav);
  background: var(--surface-strong);
  color: inherit;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
}
.app-status-banner-action:hover {
  background: var(--yellow);
}
.app-status-banner-close {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  color: inherit;
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  opacity: 0.7;
}
.app-status-banner-close:hover {
  opacity: 1;
}
.send-queue-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  max-width: min(920px, 100%);
  margin: 0 auto 8px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  background: var(--yellow);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}
.send-queue-bar[hidden] {
  display: none !important;
}
.send-queue-label {
  color: var(--text-primary);
}
.send-queue-clear {
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  cursor: pointer;
}
.send-queue-clear:hover {
  background: var(--bg-tertiary);
}
.chat-header-copy {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1px;
  overflow: hidden;
}
.chat-agent-context {
  margin-top: 0;
  padding: 0 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: var(--btn-letter-spacing);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.35;
}
.menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-nav);
  color: var(--text-primary);
  font-size: 14px;
  cursor: pointer;
  padding: 4px 8px;
}
.menu-btn:hover { background: var(--bg-tertiary); }
.chat-title {
  display: block;
  min-width: 0;
  max-width: 100%;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.01em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-primary);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: var(--button-radius);
  transition: background 120ms;
  line-height: 1.35;
}
.chat-title:hover { background: var(--bg-tertiary); }
.chat-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.chat-agent-btn {
  appearance: none;
  font-family: var(--font-mono);
  font-size: var(--btn-sm-font);
  font-weight: 700;
  text-transform: none;
  letter-spacing: var(--btn-letter-spacing);
  color: var(--text-primary);
  background: var(--surface);
  border: 1px solid var(--line);
  padding: var(--btn-sm-pad-y) 22px var(--btn-sm-pad-y) 10px;
  border-radius: var(--button-radius);
  box-shadow: none;
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
  min-height: var(--btn-sm-min-h);
  line-height: 1.2;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}
.chat-agent-btn::after {
  content: '\25BE';
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-48%);
  font-size: 9px;
  color: var(--text-secondary);
}
.chat-agent-btn:hover {
  background: var(--blue);
  box-shadow: none;
}
.chat-agent-menu {
  position: absolute;
  top: calc(100% - 6px);
  right: 16px;
  min-width: 148px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-nav);
  background: var(--surface-strong);
  box-shadow: none;
  z-index: 80;
}
.chat-agent-option {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 11px;
  border: none;
  border-radius: var(--radius-nav);
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: none;
  cursor: pointer;
}
.chat-agent-option:hover {
  background: var(--bg-tertiary);
}
.chat-agent-option.active {
  background: var(--accent-light);
  color: var(--blue-strong);
}
.chat-agent-option.active::after {
  content: '\5F53\524D';
  font-size: 9px;
  letter-spacing: 0.04em;
}
.chat-runtime-state {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--btn-sm-pad-y) var(--btn-sm-pad-x);
  border: 1px solid var(--line);
  border-radius: var(--button-radius);
  background: var(--yellow);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: var(--btn-sm-font);
  font-weight: 700;
  letter-spacing: var(--btn-letter-spacing);
  text-transform: none;
  flex-shrink: 0;
  line-height: 1.2;
}
.chat-runtime-state::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse 1.1s infinite;
}
.cost-display {
  display: inline-flex;
  align-items: center;
  max-width: 220px;
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.3;
}
.cost-display:empty,
.cost-display[hidden] {
  display: none !important;
}
.chat-session-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 0;
  min-width: 0;
  max-width: 100%;
  padding: 0 4px;
}
.chat-session-meta[hidden] {
  display: none !important;
}
.chat-header-cwd {
  color: var(--color-hollow);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: var(--font-weight-regular);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
  line-height: 1.43;
}
.chat-runtime-state.is-aborting {
  background: var(--orange, #f0c674);
}
.chat-runtime-state.is-interrupted {
  background: var(--red-soft, #f8d7da);
  animation: none;
}
.chat-runtime-state.is-waiting {
  background: var(--orange, #f0c674);
}
.interactive-request-msg {
  display: flex;
  justify-content: center;
  margin: 8px 0;
}
.interactive-request-card {
  max-width: min(560px, 92%);
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange, #d97706);
  background: var(--surface);
  padding: 12px 14px;
  border-radius: 6px;
}
.interactive-request-title {
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.interactive-request-body {
  font-size: 12px;
  color: var(--text-secondary);
  white-space: pre-wrap;
  line-height: 1.5;
}
.interactive-request-actions {
  margin-top: 10px;
  display: flex;
  gap: 8px;
}
.interactive-request-stop {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--background);
  color: var(--text-primary);
  cursor: pointer;
}
.interactive-request-stop:hover {
  border-color: var(--text-secondary);
}
.cmd-item-badge {
  flex-shrink: 0;
  margin-left: 6px;
  padding: 0 5px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.4;
  border: 1px solid var(--line);
  color: var(--text-secondary);
}
.cmd-item-badge.is-platform {
  color: var(--blue-strong, #2563eb);
  border-color: currentColor;
}
.cmd-item-badge.is-tui-only {
  color: var(--text-secondary);
  opacity: 0.85;
}
.cmd-item-badge.is-prompt {
  color: var(--accent, #0f766e);
  border-color: currentColor;
}
.cmd-item-badge.is-unavailable-badge {
  color: var(--danger, #b91c1c);
  border-color: currentColor;
}
.cmd-item.is-unavailable .cmd-item-cmd,
.cmd-item.is-unavailable .cmd-item-desc {
  opacity: 0.72;
}

/* Shared text control base (fields/selects/small text controls) */
:where(
  .login-box input,
  .force-change-form input,
  .settings-field input,
  .settings-select,
  .modal-select,
  .modal-text-input
) {
  background: var(--input-background);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-nav);
  color: var(--text-primary);
  font-size: 12px;
  font-family: var(--font-ui);
  outline: none;
  transition: border-color 120ms ease, background 120ms ease, box-shadow 120ms ease;
}

:where(
  .login-box input,
  .force-change-form input,
  .settings-field input,
  .settings-select,
  .modal-select,
  .modal-text-input
):focus {
  border-color: var(--blue);
}

:where(
  .mode-select,
  .mobile-topbar-select,
  .new-chat-dropdown button
) {
  color: var(--compact-text-control-color, var(--text-primary));
  font-family: var(--compact-text-control-font, var(--font-mono));
  font-size: var(--compact-text-control-size, 12px);
  font-weight: var(--compact-text-control-weight, 700);
  letter-spacing: var(--compact-text-control-spacing, 0.04em);
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease, border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

/* Mode selector */
.mode-select {
  -webkit-appearance: none;
  appearance: none;
  min-height: var(--btn-md-min-h);
  padding: var(--btn-sm-pad-y) 28px var(--btn-sm-pad-y) 10px;
  border: var(--toolbar-button-border);
  border-radius: var(--toolbar-button-radius);
  background: var(--toolbar-button-background);
  color: var(--toolbar-button-color);
  font-family: var(--font-mono);
  font-size: var(--btn-sm-font);
  font-weight: 700;
  text-transform: none;
  letter-spacing: var(--btn-letter-spacing);
  flex-shrink: 0;
  box-shadow: none;
  background-image: var(--select-caret-icon);
  background-repeat: no-repeat;
  background-position: right 10px center;
  cursor: pointer;
  line-height: 1.2;
}
.mode-select:hover {
  background-color: var(--toolbar-button-hover-background);
  color: var(--toolbar-button-hover-color);
  }
.mode-select:focus {
  border-color: var(--blue);
}
.mode-select option {
  background: var(--surface);
  color: var(--text-primary);
}

/* === Workspace Insights === */
.workspace-insights {
  display: none;
  width: 320px;
  border-left: 1px solid var(--line);
  background: var(--surface);
  flex-shrink: 0;
  overflow: hidden;
}
.workspace-insights.visible {
  display: flex;
  flex-direction: column;
}
.workspace-insights-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}
.workspace-insights-content {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Sidebar-first shell */
.app-workspace {
  height: 100%;
}

.sidebar {
  height: 100%;
}

.sidebar-top-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  min-height: var(--header-height);
  padding: 0 var(--spacing-12);
  border-bottom: 1px solid var(--color-hairline);
  flex-shrink: 0;
}

.sidebar-top-brand strong {
  font-size: var(--text-caption);
  font-weight: var(--font-weight-semibold);
  color: var(--color-graphite-ink);
}

.sidebar-top-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  min-width: 0;
  flex-shrink: 0;
}

.sidebar-cost {
  font-size: 12px;
  color: var(--color-hollow);
}

.sidebar-footer {
  flex-shrink: 0;
  padding: var(--spacing-12);
  border-top: 1px solid var(--color-hairline);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-10);
  text-align: left;
}

.sidebar-footer-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.sidebar-footer-label {
  font-size: 12px;
  font-weight: var(--font-weight-medium);
  color: var(--color-hollow);
  padding: 0 var(--spacing-6);
}

.sidebar-header {
  padding: var(--spacing-12);
  border-bottom: none;
  flex-shrink: 0;
  position: relative;
}

.session-search-wrap {
  position: relative;
  margin-top: var(--spacing-8);
}

.session-search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-hollow);
  pointer-events: none;
}

.session-search-input {
  width: 100%;
  box-sizing: border-box;
  padding: var(--spacing-8) 28px var(--spacing-8) 32px;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-nav);
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: var(--text-caption);
  outline: none;
}

.session-search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}

.session-search-clear {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  border-radius: var(--radius-nav);
}

.session-search-clear:hover {
  color: var(--text-primary);
  background: var(--color-hover-veil);
}

.session-search-input:focus {
  border-color: var(--color-edge-gray);
  box-shadow: none;
}

/* Chat column fills workspace; reading width applied to messages/input only */
.chat-stage-shell {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  width: 100%;
  max-width: none;
  margin: 0;
}

.input-area {
  background: var(--color-pure-white);
  border-top: 1px solid var(--color-hairline);
}