/* Shared Studio shell and controls. Workspace-specific layouts live alongside
   their features; all surfaces draw from studio-tokens.css. */
body {
  background: var(--page);
  color: var(--ink);
  font-size: 13px;
}

button, input, select, textarea {
  font-family: var(--font-sans);
  color: var(--ink);
}

button, input, select, textarea, summary, a, [tabindex] {
  outline-offset: 3px;
}

:is(button, input, select, textarea, summary, a, [tabindex]):focus-visible {
  outline: 2px solid var(--focus);
}

#main:focus-visible {
  outline-offset: -3px;
}

summary {
  min-height: 24px;
  cursor: pointer;
}

input[type="checkbox"], input[type="radio"], input[type="range"] {
  accent-color: var(--accent);
}

input:not([type="checkbox"]):not([type="radio"]):not([type="range"]),
select, textarea {
  border-color: var(--control-line);
  border-radius: var(--radius-sm);
}

textarea {
  background: var(--surface);
}

input::placeholder, textarea::placeholder {
  color: var(--muted);
  opacity: 1;
}

button:disabled, input:disabled, select:disabled, textarea:disabled {
  cursor: not-allowed;
}

.button {
  min-height: 38px;
  font-size: 12px;
  font-weight: 500;
}

.button-secondary {
  background: var(--surface);
  border-color: var(--control-line);
  color: var(--ink);
}

.button-secondary:hover:not(:disabled) {
  background: var(--hover);
}

.text-button, .icon-button {
  color: var(--accent);
}

.button:active:not(:disabled) {
  transform: translateY(1px);
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(27px, 2.7vw, 36px);
  letter-spacing: -.5px;
  font-weight: 400;
  line-height: 1.2;
}

h2, h3, h4, strong, b {
  font-weight: 500;
}

.eyebrow {
  font: 400 11px/1.6 var(--font-mono);
  letter-spacing: .09em;
}

code, pre, .version, .local-label, .step-marker, .phase-tag,
.workspace-location p, .session-stats strong, .monospace {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.topbar {
  height: auto;
  min-height: 76px;
  padding: 16px 28px;
  gap: 24px;
  background: var(--page);
  border-bottom: 0;
}

.brand {
  font: 400 30px/1 var(--font-display);
  letter-spacing: .075em;
  flex-shrink: 0;
}

.brand-mark {
  display: none;
}

.brand-description {
  font: 400 12px/1.4 var(--font-sans);
  letter-spacing: 0;
  margin-left: 6px;
  padding-left: 20px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
  min-width: 0;
}

.appearance-control {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  color: var(--muted);
  font-size: 11px;
  font-weight: 400;
}

.appearance-control select {
  min-height: 36px;
  width: auto;
  min-width: 94px;
  font-size: 12px;
  background: var(--page);
}

.sidebar-toggle {
  display: none;
}

.workspace-state {
  font-size: 11px;
  flex-wrap: wrap;
}

.status-dot {
  background: var(--success);
  box-shadow: none;
}

.version {
  background: var(--field);
  border: 0;
  padding: 4px 6px;
  font-size: 11px;
  margin-left: 2px;
}

#workspace-navigation {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0 24px;
  padding: 0 28px;
  margin: 0;
  background: var(--page);
  border-bottom: 1px solid var(--line);
}

#workspace-navigation .workspace-tab {
  min-height: 48px;
  padding: 12px 0;
  font-size: 12px;
  font-weight: 400;
  white-space: nowrap;
}

#workspace-navigation .workspace-tab span {
  font: 400 11px var(--font-mono);
  margin-right: 7px;
  opacity: 1;
}

#workspace-navigation .workspace-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

#workspace-navigation .workspace-tab:hover:not(.active) {
  color: var(--ink);
}

.shell {
  grid-template-columns: 244px minmax(0, 1fr);
  min-height: calc(100dvh - 125px);
}

.sidebar {
  background: var(--surface);
  padding: 28px 20px;
  min-width: 0;
}

.sidebar-heading {
  margin-bottom: 24px;
}

.sidebar .session-list {
  margin-inline: 0;
  gap: 4px;
}

.session-item {
  border-left: 2px solid transparent;
  padding: 11px 10px;
}

.session-item.active {
  background: var(--field);
  border-color: transparent;
  border-left-color: var(--accent);
}

.project-picker {
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.project-picker > label {
  background: transparent;
}

.project-create summary {
  color: var(--accent);
}

main {
  padding: 32px 32px 0;
}

.page-heading {
  margin-bottom: 26px;
  align-items: flex-start;
}

.page-description {
  max-width: 760px;
  font-size: 13px;
  line-height: 1.65;
}

.phase-tag {
  border: 0;
  background: transparent;
  font-size: 11px;
  padding: 4px 0;
  color: var(--muted);
}

.panel-heading h2 {
  font-size: 16px;
}

.field-hint, .optional, .page-footer {
  color: var(--muted);
  font-size: 11px;
}

.panel, .modal, .annotation-record-dialog {
  box-shadow: none;
}

.modal, .annotation-record-dialog {
  background: var(--surface);
  color: var(--ink);
  border-radius: var(--radius);
  border-color: var(--control-line);
}

dialog::backdrop {
  background: var(--backdrop);
}

.empty-assets {
  background: var(--surface-raised);
}

.source-dropzone {
  background: var(--surface-raised);
  border-color: var(--control-line);
}

.source-dropzone.dragging {
  background: var(--accent-soft);
}

.extract-timeline-range {
  border: 1px solid var(--accent);
}

.filter-button.active, .annotation-tools .active {
  background: var(--field);
  color: var(--ink);
  border-color: var(--control-line);
}

.skip-link, .benchmark-editor-toolbar .active {
  background: var(--primary);
  color: var(--on-primary);
}

.annotation-status.validated, .review-queue-badge.validated {
  color: var(--success);
  background: var(--success-soft);
}

.annotation-canvas-wrap, .prediction-visual, .dataset-import-image-wrap {
  color: var(--canvas-ink);
}

.annotation-box rect, .annotation-proposal-box rect {
  filter: drop-shadow(0 0 1px var(--annotation-edge));
}

@media (max-width: 1100px) {
  .topbar, #workspace-navigation { padding-inline: 22px; }
  .topbar-actions { gap: 16px; }
  #workspace-navigation { gap: 0 18px; }
  .shell { grid-template-columns: 220px minmax(0, 1fr); }
  .sidebar { padding: 24px 16px; }
  main { padding: 26px 24px 0; }
}

@media (max-width: 900px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar-toggle { display: inline-flex; }
  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 24px;
  }
  .brand-description { display: none; }
  .sidebar-heading { display: flex; }
  #workspace-navigation { gap: 0 18px; }
}

@media (max-width: 600px) {
  .topbar { padding: 16px; gap: 12px; flex-wrap: wrap; }
  .brand { font-size: 28px; }
  .topbar-actions { gap: 10px; flex-wrap: wrap; flex: 1; }
  .workspace-state { display: none; }
  .appearance-control { gap: 6px; }
  .appearance-control > span { display: none; }
  .appearance-control select { min-width: 88px; }
  .sidebar-toggle { padding: 8px 10px; font-size: 12px; }
  #workspace-navigation {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding: 0 12px;
    gap: 0 10px;
  }
  #workspace-navigation .workspace-tab {
    text-align: left;
    white-space: normal;
    line-height: 1.4;
    padding: 9px 2px;
    font-size: 12px;
  }
  #workspace-navigation .workspace-tab span { display: none; }
  main { padding: 24px 16px 0; }
  .page-heading { margin-bottom: 22px; }
  .page-description { font-size: 12px; }
  .sidebar { padding: 20px 16px; }
  .session-form { display: block; }
  .session-form label { margin-bottom: 7px; }
  .session-form input { margin-bottom: 14px; }
  .session-form .field-hint { font-size: 11px; margin: 0 0 14px; }
  .session-form h3 { margin-bottom: 16px; }
  .sidebar .session-list { grid-template-columns: minmax(0, 1fr); }
  .workspace-location { display: block; padding-top: 24px; }
  .modal { padding: 20px 16px; }
  .panel-heading { flex-wrap: wrap; }
}

@media (pointer: coarse) {
  .button, .text-button, .icon-button, .close-button,
  #appearance-select, .filter-button, summary { min-height: 44px; }
  .icon-button, .close-button { min-width: 44px; }
  input:not([type="checkbox"]):not([type="radio"]), select, textarea {
    font-size: 16px;
    min-height: 44px;
  }
}