/* =========================================================================
   maestro web — design system
   Register: product (a tool; design serves the task).
   Identity: precise, calm, alive. Monospace-as-UI; signal-green = "alive".
   Theme: dark (default) + light, all via OKLCH custom-property tokens.
   ========================================================================= */

:root {
  /* ---- type ---- */
  --font-mono:
    ui-monospace, "SF Mono", "SFMono-Regular", "Cascadia Code", "JetBrains Mono",
    "Roboto Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --font-sans:
    system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  --fs-11: 0.6875rem;
  --fs-12: 0.75rem;
  --fs-13: 0.8125rem;
  --fs-14: 0.875rem;
  --fs-15: 0.9375rem;
  --fs-17: 1.0625rem;
  --fs-20: 1.25rem;

  /* ---- spacing ---- */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;

  /* ---- radii ----
     Terminal-native: crisp, near-square corners. Round dots (status, brand)
     use border-radius:50% directly and are unaffected; these tokens govern
     rectangles (buttons, inputs, cards, tags) and stay sharp on purpose. */
  --r-1: 2px;
  --r-2: 3px;
  --r-3: 4px;
  --r-pill: 3px;

  /* ---- sizing ---- */
  --row-h: 46px;
  --control-h: 30px;
  --tap: 40px;
  /* Height of the two top-of-pane bars (sidebar search + attach header) — shared
     so they line up across the split. */
  --bar-h: 34px;

  /* ---- motion ---- */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 120ms;
  --dur: 180ms;
  --dur-slow: 240ms;

  /* ---- z-index scale ---- */
  --z-sticky: 10;
  --z-backdrop: 40;
  --z-modal: 50;
  --z-toast: 60;

  /* ---- color: dark (default) ---- */
  color-scheme: dark;

  --bg: oklch(0.178 0.012 256);
  --bg-grid: oklch(0.215 0.014 256);
  --surface: oklch(0.214 0.014 256);
  --surface-2: oklch(0.252 0.016 256);
  --surface-3: oklch(0.292 0.018 256);
  --border: oklch(0.318 0.018 256);
  --border-strong: oklch(0.4 0.022 256);

  --ink: oklch(0.945 0.006 256);
  --muted: oklch(0.722 0.014 256);
  --faint: oklch(0.58 0.014 256);

  /* signal green = "alive", primary action, focus, selection */
  --accent: oklch(0.83 0.16 152);
  --accent-strong: oklch(0.88 0.17 152);
  --accent-ink: oklch(0.2 0.03 256);
  --accent-tint: oklch(0.83 0.16 152 / 0.12);
  --accent-ring: oklch(0.83 0.16 152 / 0.55);

  --live: oklch(0.84 0.17 152);
  --live-glow: oklch(0.84 0.17 152 / 0.55);

  --danger: oklch(0.72 0.18 25);
  --danger-tint: oklch(0.72 0.18 25 / 0.14);
  --warn: oklch(0.82 0.14 85);

  --shadow-1: 0 1px 2px oklch(0 0 0 / 0.4);
  --shadow-2:
    0 12px 28px -8px oklch(0 0 0 / 0.6), 0 2px 8px oklch(0 0 0 / 0.4);
  --term-bg: oklch(0.158 0.012 256);
}

:root[data-theme="light"],
:root[data-theme="light"] body {
  color-scheme: light;

  --bg: oklch(0.985 0.003 256);
  --bg-grid: oklch(0.93 0.006 256);
  --surface: oklch(1 0 0);
  --surface-2: oklch(0.965 0.004 256);
  --surface-3: oklch(0.93 0.006 256);
  --border: oklch(0.892 0.008 256);
  --border-strong: oklch(0.82 0.012 256);

  --ink: oklch(0.26 0.014 256);
  --muted: oklch(0.47 0.016 256);
  --faint: oklch(0.62 0.016 256);

  --accent: oklch(0.6 0.15 151);
  --accent-strong: oklch(0.55 0.16 151);
  --accent-ink: oklch(0.99 0.01 152);
  --accent-tint: oklch(0.6 0.15 151 / 0.12);
  --accent-ring: oklch(0.6 0.15 151 / 0.5);

  --live: oklch(0.6 0.16 151);
  --live-glow: oklch(0.6 0.16 151 / 0.45);

  --danger: oklch(0.55 0.21 27);
  --danger-tint: oklch(0.55 0.21 27 / 0.1);
  --warn: oklch(0.66 0.15 75);

  --shadow-1: 0 1px 2px oklch(0.5 0.02 256 / 0.12);
  --shadow-2:
    0 16px 36px -12px oklch(0.4 0.03 256 / 0.28),
    0 2px 8px oklch(0.5 0.02 256 / 0.1);
  --term-bg: oklch(0.165 0.012 256);
}

/* Follow the OS when the user hasn't pinned a theme. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    color-scheme: light;

    --bg: oklch(0.985 0.003 256);
    --bg-grid: oklch(0.93 0.006 256);
    --surface: oklch(1 0 0);
    --surface-2: oklch(0.965 0.004 256);
    --surface-3: oklch(0.93 0.006 256);
    --border: oklch(0.892 0.008 256);
    --border-strong: oklch(0.82 0.012 256);

    --ink: oklch(0.26 0.014 256);
    --muted: oklch(0.47 0.016 256);
    --faint: oklch(0.62 0.016 256);

    --accent: oklch(0.6 0.15 151);
    --accent-strong: oklch(0.55 0.16 151);
    --accent-ink: oklch(0.99 0.01 152);
    --accent-tint: oklch(0.6 0.15 151 / 0.12);
    --accent-ring: oklch(0.6 0.15 151 / 0.5);

    --live: oklch(0.6 0.16 151);
    --live-glow: oklch(0.6 0.16 151 / 0.45);

    --danger: oklch(0.55 0.21 27);
    --danger-tint: oklch(0.55 0.21 27 / 0.1);
    --warn: oklch(0.66 0.15 75);

    --shadow-1: 0 1px 2px oklch(0.5 0.02 256 / 0.12);
    --shadow-2:
      0 16px 36px -12px oklch(0.4 0.03 256 / 0.28),
      0 2px 8px oklch(0.5 0.02 256 / 0.1);
    --term-bg: oklch(0.165 0.012 256);
  }
}

/* ---------- reset / base ---------- */

* {
  box-sizing: border-box;
}

*:focus {
  outline: none;
}

html,
body {
  height: 100%;
  margin: 0;
  /* No pull-to-refresh / scroll chaining — terminal scroll wins on touch. */
  overscroll-behavior: none;
}

body {
  overflow-x: hidden;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--fs-15);
  line-height: 1.45;
  font-feature-settings: "ss01", "cv01";
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* faint structural grid — terminal texture, not a CRT costume */
  background-image:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 100% 64px, 64px 100%;
  background-position: center top;
  /* dim the grid via opacity on a fixed overlay would cost a node; bake it low instead */
}

#app {
  /* `--app-vh` tracks the *visual* viewport (set by installViewportSizing) so
     the shell stays above the mobile soft keyboard; falls back to the layout
     viewport where `visualViewport` is unavailable. `--app-top` follows the
     layout viewport's scroll under the keyboard so the shell stays pinned to
     the visible region instead of drifting to the top. */
  height: var(--app-vh, 100%);
  transform: translateY(var(--app-top, 0px));
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  padding: 1px 5px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-1);
}

::selection {
  background: var(--accent-tint);
  color: var(--ink);
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

::placeholder {
  color: var(--faint);
  opacity: 1;
}

:focus-visible {
  outline: 2px solid var(--accent-ring);
  outline-offset: 2px;
  border-radius: var(--r-1);
}

/* ---------- buttons ----------
   Terminal-native: the brackets are the chrome. Default + primary wear
   [ brackets ]; ghost/icon drop them for quieter nav and single glyphs. */

.btn {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--ink);
  padding: 0 var(--sp-1);
  height: var(--control-h);
  min-height: var(--control-h);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  font-weight: 500;
  letter-spacing: 0.01em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  white-space: nowrap;
  transition:
    color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
}

.btn::before {
  content: "[";
  color: var(--faint);
}

.btn::after {
  content: "]";
  color: var(--faint);
}

.btn:hover {
  color: var(--accent);
}

.btn:hover::before,
.btn:hover::after {
  color: var(--accent);
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  color: var(--accent);
  font-weight: 600;
}

.btn-primary::before,
.btn-primary::after {
  color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-tint);
}

/* Ghost: no brackets — quiet nav (back, disconnect, theme, kit) and icons. */
.btn-ghost {
  color: var(--muted);
}

.btn-ghost::before,
.btn-ghost::after {
  content: none;
}

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

.btn-icon {
  width: var(--control-h);
  padding: 0;
  font-size: var(--fs-15);
}

.btn-icon::before,
.btn-icon::after {
  content: none;
}

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

/* ---------- app shell: sidebar + content ---------- */

/* Global app header: brand + app-level actions (spawn, theme toggle), spanning
   the full width above the split. */
.app-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex: 0 0 auto;
  padding: var(--sp-1) var(--sp-3);
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 82%, transparent);
  backdrop-filter: blur(8px);
}

/* Hamburger to the left of the brand — toggles the off-canvas session drawer.
   Mobile only (desktop keeps the sidebar permanently in view). */
.app-menu {
  display: none;
  place-items: center;
  flex: none;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: var(--r-1);
  background: transparent;
  color: var(--ink);
  font-size: var(--fs-17);
  cursor: pointer;
}
.app-menu:hover {
  background: var(--surface-2);
}

/* Three-part header: brand (left), status (centered), actions (right). Equal
   flex on the outer two keeps the status group truly centered. */
.app-header .brand {
  flex: 1 1 0;
  min-width: 0;
  margin-right: 0;
}

.app-status {
  flex: 0 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
  overflow: hidden;
}

.app-status .statusbar {
  border-bottom: 0;
  background: transparent;
  padding: 0;
  flex-wrap: nowrap;
}

.app-status .statusbar .spacer {
  display: none;
}

.app-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex: 1 1 0;
  justify-content: flex-end;
}

.app-shell {
  flex: 1 1 auto;
  min-height: 0;
}

/* Desktop: persistent two-pane split. Sidebar holds the session list; the
   content pane shows the welcome state or the attached terminal. */
@media (min-width: 860px) {
  .app-shell {
    display: grid;
    grid-template-columns:
      var(--sidebar-w, clamp(220px, 22vw, 320px)) minmax(0, 1fr);
  }
}

.sidebar {
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  overflow: hidden;
  position: relative;
  background: color-mix(in oklab, var(--surface) 26%, var(--bg));
  border-right: 1px solid var(--border);
}

/* Drag-to-resize grip on the sidebar's right edge (desktop split only). */
.sidebar-resize {
  position: absolute;
  top: 0;
  right: -3px;
  width: 6px;
  height: 100%;
  cursor: col-resize;
  z-index: var(--z-sticky);
  touch-action: none;
}

.sidebar-resize:hover,
.sidebar-resize:active {
  background: var(--accent-ring);
}

@media (max-width: 859px) {
  .sidebar-resize {
    display: none;
  }
  .app-status {
    display: none;
  }
}

/* Sidebar's own slim header: just the session search (app-level actions live
   in the global top bar). */
/* The search input IS the header — it spans edge to edge, flush, with just a
   bottom rule for separation. No wrapper padding, no boxed border/radius. */
.sidebar-search {
  flex: 0 0 auto;
}

.sidebar-search .search {
  width: 100%;
  max-width: none;
  height: var(--bar-h);
  border: 0;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  background: transparent;
}

.sidebar-search .search:hover {
  background: var(--surface-2);
  border-bottom-color: var(--border-strong);
}

.sidebar-search .search:focus {
  background: var(--surface-2);
  border-bottom-color: var(--accent);
  box-shadow: none;
}

.content {
  min-width: 0;
  min-height: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
}

.content-welcome {
  margin: auto;
  max-width: 48ch;
}

/* Off-screen home for parked-but-connected terminals. Kept in the DOM (not
   display:none) so the live WS keeps buffering into each terminal; on
   re-mount we fit + the scrollback is already there, so switching is instant. */
.conn-cache {
  position: fixed;
  left: -99999px;
  top: 0;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ---------- catalog ---------- */

.catalog {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
}

.catalog-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-bottom: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface) 82%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-right: auto;
}

.brand-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--live);
  box-shadow: 0 0 0 4px var(--live-glow);
  flex: 0 0 auto;
  animation: pulse 2.4s var(--ease-out) infinite;
}

.brand h1 {
  margin: 0;
  font-size: var(--fs-17);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.brand .blink {
  color: var(--accent);
  font-weight: 400;
  animation: blink 1.2s steps(1) infinite;
}

.catalog-actions {
  display: flex;
  flex: 1 1 280px;
  gap: var(--sp-2);
  align-items: center;
  justify-content: flex-end;
}

.search {
  flex: 1 1 200px;
  max-width: 340px;
  height: var(--control-h);
  padding: 0 var(--sp-3);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-2);
  color: var(--ink);
  transition:
    border-color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out);
}

.search:hover {
  border-color: var(--border-strong);
}

.search:focus {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

/* ---------- status bar ---------- */

.statusbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  font-size: var(--fs-12);
  color: var(--muted);
}

.statusbar .spacer {
  /* zero basis: claim leftover space without inflating the bar's min width */
  flex: 1 1 0;
  min-width: var(--sp-2);
}

.session-tally {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-variant-numeric: tabular-nums;
}

.session-tally::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--live);
  box-shadow: 0 0 5px var(--live-glow);
}

/* ---------- session tree ---------- */

.tree {
  flex: 1 1 auto;
  overflow: auto;
  padding: var(--sp-1) 0 var(--sp-4);
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.tree-folder {
  display: flex;
  flex-direction: column;
}

.tree-folder-header {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  background: transparent;
  border: 0;
  width: 100%;
  text-align: left;
  height: 38px;
  padding-right: var(--sp-4);
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  transition: color var(--dur-fast) var(--ease-out);
}

.tree-folder-header:hover {
  color: var(--ink);
}

.tree-folder-header .chevron {
  width: 16px;
  text-align: center;
  color: var(--faint);
  font-size: var(--fs-11);
  transition:
    transform var(--dur) var(--ease-out),
    color var(--dur-fast) var(--ease-out);
}

.tree-folder-header[aria-expanded="false"] .chevron {
  transform: rotate(-90deg);
}

.tree-folder-header:hover .chevron {
  color: var(--accent);
}

.folder-name {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--ink);
  font-size: var(--fs-14);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Earlier path segments collapse to their initial; the trailing segment (the
   one that actually names the dir) stays full. Dim the collapsed prefix. Shared
   by the sidebar tree and the spawn dialog's recent-directory picker. */
.folder-name .folder-stem,
.recent-dir .folder-stem {
  color: var(--faint);
}

.tree-leaf {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  min-height: 30px;
  margin: 1px var(--sp-2);
  padding: 4px var(--sp-3);
  border-radius: var(--r-1);
  color: var(--ink);
  position: relative;
  transition:
    background var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out);
}

/* "Alive" reads as a faint wash on the row itself — no per-row status icon. */
.tree-leaf[data-status="running"] {
  background: color-mix(in oklab, var(--accent) 6%, transparent);
}

.tree-leaf:hover {
  background: var(--surface-2);
}

.tree-leaf[data-status="running"]:hover {
  background: color-mix(in oklab, var(--accent) 13%, var(--surface-2));
}

.tree-leaf:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 1px var(--accent-ring);
}

/* The session currently mounted in the content pane. */
.tree-leaf.is-active,
.tree-leaf.is-active[data-status="running"] {
  background: var(--accent-tint);
  box-shadow: inset 0 0 0 1px var(--accent-ring);
}

.tree-leaf.is-active .leaf-name {
  color: var(--ink);
}

/* Exited sessions recede: dimmed name + an "exited" badge carry status, so it's
   never the running tint's absence alone doing the work. */
.tree-leaf[data-status="dead"] {
  color: var(--muted);
}

.tree-leaf[data-status="dead"] .leaf-name {
  color: var(--muted);
  font-weight: 400;
}

.leaf-name {
  font-weight: 500;
  font-size: var(--fs-13);
  flex: 0 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaf-meta {
  font-size: var(--fs-11);
  color: var(--muted);
  margin-left: auto;
  padding-left: var(--sp-2);
  min-width: 0;
  flex: 0 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: inline-flex;
  align-items: baseline;
  gap: var(--sp-2);
}

.leaf-cmd {
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaf-badge {
  font-size: var(--fs-11);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  padding: 1px 8px;
  flex: 0 0 auto;
}

.leaf-actions {
  position: absolute;
  right: var(--sp-1);
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  gap: 2px;
}

.leaf-act {
  background: var(--surface-3);
  color: var(--faint);
  border: 1px solid var(--border);
  border-radius: var(--r-1);
  width: 24px;
  height: 24px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-12);
  transition:
    color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
}

@media (hover: hover) {
  .leaf-actions {
    opacity: 0;
    transition: opacity var(--dur-fast) var(--ease-out);
  }
  .tree-leaf:hover .leaf-actions,
  .tree-leaf:focus-within .leaf-actions {
    opacity: 1;
  }
}

.leaf-clone:hover {
  color: var(--accent);
  background: var(--accent-tint);
  border-color: color-mix(in oklab, var(--accent) 40%, transparent);
}

.leaf-kill:hover {
  color: var(--danger);
  background: var(--danger-tint);
  border-color: color-mix(in oklab, var(--danger) 40%, transparent);
}

/* ---------- empty / loading ---------- */

.empty {
  padding: var(--sp-5) var(--sp-4);
  color: var(--muted);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-sans);
}

.empty-glyph {
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: var(--r-3);
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  background: var(--surface);
}

.empty-title {
  color: var(--ink);
  font-size: var(--fs-15);
  font-family: var(--font-mono);
}

.empty-hint {
  font-size: var(--fs-13);
  max-width: 42ch;
}

.empty-hint kbd {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: var(--r-1);
  padding: 1px 6px;
  color: var(--ink);
}

.empty-actions {
  display: flex;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
}

/* ---------- attach view ---------- */

.attach {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--bg);
}

.attach-header {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  height: var(--bar-h);
  padding: 0 var(--sp-2);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

/* Compact controls so the bar hugs the title — no tall buttons. */
.attach-header .btn {
  height: 26px;
  min-height: 26px;
}

.attach-header .btn-icon {
  width: 26px;
}

.attach-header .back {
  font-size: var(--fs-15);
  width: 28px;
  height: 26px;
}

/* Desktop keeps the session list permanently in view, so the in-header "back"
   arrow is redundant — the sidebar is the nav. Mobile (single-pane) keeps it. */
@media (min-width: 860px) {
  .attach-header .back {
    display: none;
  }
}

.attach-header .disconnect {
  color: var(--faint);
}

.attach-header .disconnect:hover {
  color: var(--danger);
  background: var(--danger-tint);
  border-color: color-mix(in oklab, var(--danger) 40%, transparent);
}

.attach-title {
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1 1 auto;
}

.attach-title .sid {
  color: var(--muted);
}

.attach-title .at-name {
  color: var(--ink);
  font-weight: 500;
}

.attach-title .at-cmd {
  color: var(--muted);
}

.attach-title .at-cmd::before {
  content: "·";
  margin: 0 6px;
  color: var(--faint);
}

.attach-title .at-host {
  color: var(--faint);
  margin-left: 6px;
}

.attach-title .at-host::before {
  content: "@";
  opacity: 0.6;
}

.attach-state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-12);
  padding: 2px var(--sp-2);
  border-radius: var(--r-pill);
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
  white-space: nowrap;
}

.attach-state::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.attach-state[data-state="connecting"] {
  color: var(--warn);
}

.attach-state[data-state="connecting"]::before {
  animation: pulse 1.2s var(--ease-out) infinite;
}

.attach-state[data-state="open"] {
  color: var(--accent);
}

.attach-state[data-state="open"]::before {
  box-shadow: 0 0 6px var(--live-glow);
}

.attach-state[data-state="closed"],
.attach-state[data-state="error"] {
  color: var(--danger);
}

.attach-body {
  flex: 1 1 auto;
  min-height: 0;
  padding: var(--sp-2);
  display: flex;
  overflow: hidden;
  background: var(--term-bg);
}

.attach-body .xterm {
  width: 100%;
  height: 100%;
}

/* xterm hard-codes overflow-y: scroll on its viewport — an always-on bar that
   (a) shows even with no scrollback and (b) makes FitAddon subtract its width,
   costing a column. Hide it entirely: scroll still works via wheel/touch/keys,
   and fit reclaims the full width. */
/* Higher specificity than xterm's own `.xterm .xterm-viewport` (which loads
   after this and would otherwise win the tie) so the always-on scrollbar
   reservation actually goes away. */
.attach-body .xterm .xterm-viewport {
  overflow-y: auto;
  scrollbar-width: none;
  /* We drive scrollback from touchmove (see attach.ts); claim vertical pans so
     the browser doesn't fight the handler or trigger gestures mid-scroll. */
  touch-action: pan-y;
}

.attach-body .xterm .xterm-viewport::-webkit-scrollbar {
  width: 0;
  height: 0;
}

/* Mobile: full-bleed terminal — the desktop frame padding wastes space and the
   sub-cell remainder it left was triggering a stray scrollbar. */
@media (max-width: 859px) {
  .attach-body {
    padding: 0;
  }
}

.attach-status {
  margin: var(--sp-4);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--r-2);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: var(--fs-14);
  color: var(--muted);
}

.attach-status.status-error {
  border-color: color-mix(in oklab, var(--danger) 50%, var(--border));
  color: var(--danger);
}

/* ---------- mobile special-key bar (Termux-style) ---------- */

/* Two compact rows (Termux layout) in a 5-column grid the 10 keys flow into:
   Esc/Tab + Ctrl/Alt on the left, cursor keys as a real-keyboard inverted-T on
   the right (Home/End fill the top corners). Layout is always defined; only
   *visibility* is gated: hidden on precise-pointer devices (a physical keyboard
   already has these keys), shown on touch where the soft keyboard omits them.
   The shell tracks the visual viewport (see `#app`), so it lands above it. */
.attach-keybar {
  display: none;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-1);
  padding: var(--sp-1) var(--sp-2);
  padding-bottom: calc(var(--sp-1) + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--border);
  background: var(--surface);
}

/* Shown on touch only while *this* terminal is focused (`keybar-active`, toggled
   on textarea focus/blur in attach.ts) AND the soft keyboard is actually up
   (`html.kb-open`, detected from the visual-viewport shrink in viewport.ts).
   Both are needed: dismissing the keyboard doesn't blur the terminal, so focus
   alone would leave the bar lingering. */
@media (pointer: coarse) {
  html.kb-open .attach-keybar.keybar-active {
    display: grid;
  }
}

.attach-keybar .keycap {
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--fs-13);
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-1);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
}

.attach-keybar .keycap:active {
  background: var(--surface-3);
  border-color: var(--border-strong);
}

/* Explicit press feedback: `pointerdown` preventDefault (kept for terminal
   focus) suppresses native `:active` on touch, so flash a quick spring. */
@keyframes keycap-press {
  0% {
    transform: scale(0.92);
    background: var(--accent-tint);
    border-color: var(--accent);
  }
  100% {
    transform: scale(1);
  }
}

.attach-keybar .keycap.is-pressed {
  animation: keycap-press 200ms var(--ease-out);
}

/* Armed sticky modifier (Ctrl/Alt): lit in signal-green until it folds into the
   next key. */
.attach-keybar .keycap-mod[aria-pressed="true"] {
  color: var(--accent-ink);
  background: var(--accent);
  border-color: var(--accent-strong);
}

/* ---------- modal ---------- */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: oklch(0.12 0.01 256 / 0.6);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
  z-index: var(--z-modal);
  animation: fade var(--dur) var(--ease-out);
}

@media (min-width: 600px) {
  .modal-backdrop {
    align-items: center;
    padding: var(--sp-6);
  }
}

.modal {
  background: var(--surface);
  border-radius: var(--r-3) var(--r-3) 0 0;
  border: 1px solid var(--border);
  width: 100%;
  max-width: 560px;
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-2);
  animation: sheet-up var(--dur-slow) var(--ease-out);
}

@media (min-width: 600px) {
  .modal {
    border-radius: var(--r-3);
    animation: pop var(--dur) var(--ease-out);
  }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-3);
  border-bottom: 1px solid var(--border);
}

.modal-header h2 {
  margin: 0;
  font-size: var(--fs-15);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}

.modal-header h2::before {
  content: "+";
  color: var(--accent);
  font-weight: 700;
}

.modal-body {
  padding: var(--sp-3);
  overflow: auto;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.modal-body label,
.spawn-form label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: var(--fs-12);
  color: var(--muted);
  letter-spacing: 0.01em;
}

.modal-body label.row-inline,
.spawn-form label.row-inline {
  flex-direction: row;
  align-items: center;
  gap: var(--sp-2);
  color: var(--ink);
  font-size: var(--fs-14);
  cursor: pointer;
}

.modal-body input[type="text"],
.modal-body input[type="search"],
.modal-body select,
.spawn-form input[type="text"] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-2);
  padding: 10px var(--sp-3);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--fs-15);
  width: 100%;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out);
}

.modal-body input[type="text"]:hover,
.modal-body select:hover,
.spawn-form input[type="text"]:hover {
  border-color: var(--border-strong);
}

.modal-body input[type="text"]:focus,
.modal-body input[type="search"]:focus,
.modal-body select:focus,
.spawn-form input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-tint);
}

.modal-body input[type="checkbox"],
.spawn-form input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  flex: 0 0 auto;
}

.worktree {
  border: 1px solid var(--border);
  border-radius: var(--r-2);
  padding: var(--sp-3);
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  background: color-mix(in oklab, var(--surface-2) 50%, transparent);
}

.worktree legend {
  padding: 0 6px;
  color: var(--ink);
  font-size: var(--fs-13);
}

.modal-actions {
  display: flex;
  gap: var(--sp-2);
  justify-content: flex-end;
  margin-top: var(--sp-2);
}

.form-error {
  color: var(--danger);
  margin: 0;
  font-size: var(--fs-13);
  min-height: 1.2em;
}

.form-error:not(:empty) {
  padding: var(--sp-2) var(--sp-3);
  background: var(--danger-tint);
  border-radius: var(--r-2);
}

/* ---------- spawn form: tiles + recents picker (#27) ---------- */

.spawn-modal .field,
.spawn-form .field {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.field-label {
  font-size: var(--fs-13);
  color: var(--ink);
}

/* One-click tiles: host row + command row. */
.tile-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.tile {
  flex: 1 1 auto;
  min-width: 96px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: flex-start;
  padding: var(--sp-2) var(--sp-3);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-2);
  color: var(--ink);
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out);
}

.tile:hover {
  border-color: var(--border-strong);
}

.tile.is-active {
  border-color: var(--accent);
  background: var(--accent-tint);
}

.tile-label {
  font-size: var(--fs-14);
  font-weight: 600;
}

.tile-sub {
  font-size: var(--fs-12);
  color: var(--muted);
  font-family: var(--font-mono);
}

.tile-more {
  flex: 0 0 auto;
  min-width: 0;
  justify-content: center;
  align-items: center;
  color: var(--muted);
}

/* Project picker rows (#59). Worktree rows are indented under their base
   repository; rows stale beyond 7 days are dimmed but still selectable. */
.picker {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  max-height: 220px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.project-filter {
  width: 100%;
}

.project-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: 6px var(--sp-3);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-2);
  color: var(--ink);
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition:
    border-color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out);
}

.project-row:hover {
  border-color: var(--border-strong);
}

.project-row.is-active {
  border-color: var(--accent);
  background: var(--accent-tint);
}

.project-row.is-worktree {
  margin-left: var(--sp-4);
}

.project-row.is-stale {
  opacity: 0.55;
}

.project-info {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  min-width: 0;
}

.project-name {
  font-size: var(--fs-13);
  font-weight: 600;
  white-space: nowrap;
}

.recent-dir {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.recent-cmd {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
}

.project-other .recent-dir {
  font-family: inherit;
  font-style: italic;
}

.picker-empty {
  margin: 0;
  padding: 6px var(--sp-3);
  color: var(--faint);
  font-size: var(--fs-13);
}

.picker-loading {
  margin: 0;
  padding: 6px var(--sp-3);
  color: var(--faint);
  font-size: var(--fs-13);
}

.raw-wrap {
  display: flex;
}

.raw-input {
  width: 100%;
}

/* Worktree-by-branch: inferred repo line + inline hint. */
.wt-hint {
  margin: 0;
  font-size: var(--fs-12);
  color: var(--muted);
}

.wt-body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.wt-repo {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--muted);
}

/* Generated-name field with a reroll button. */
.name-row {
  display: flex;
  gap: var(--sp-2);
  align-items: center;
}

.name-row input {
  flex: 1 1 auto;
}

.form-actions {
  display: flex;
  gap: var(--sp-2);
  justify-content: flex-end;
  margin-top: var(--sp-2);
}

.reroll {
  flex: 0 0 auto;
}

/* ---------- directory autocomplete (NAP-329) ---------- */

.dir-ac {
  position: fixed;
  z-index: var(--z-toast); /* above the modal it completes within */
  margin: 0;
  padding: var(--sp-1);
  list-style: none;
  max-height: 280px;
  overflow-y: auto;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-2);
  box-shadow: var(--shadow-2);
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.dir-ac-item {
  padding: 6px var(--sp-2);
  border-radius: var(--r-1);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dir-ac-item:hover {
  background: var(--surface-2);
}

.dir-ac-item.is-active {
  background: var(--accent-tint);
  color: var(--ink);
}

.dir-ac-more {
  padding: 6px var(--sp-2);
  color: var(--faint);
  font-size: var(--fs-12);
  font-style: italic;
}

/* ---------- not-found ---------- */

.not-found {
  margin: auto;
  padding: var(--sp-5) var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  align-items: center;
  text-align: center;
}

.not-found h1 {
  margin: 0;
  font-size: var(--fs-20);
}

.not-found p {
  margin: 0;
  color: var(--muted);
}

/* ---------- theme toggle ---------- */

.theme-toggle {
  position: relative;
  overflow: hidden;
}

.theme-toggle .sun,
.theme-toggle .moon {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  transition:
    transform var(--dur) var(--ease-out),
    opacity var(--dur) var(--ease-out);
}

.theme-toggle .moon {
  transform: translateY(0);
  opacity: 1;
}

.theme-toggle .sun {
  transform: translateY(120%);
  opacity: 0;
}

:root[data-theme="light"] .theme-toggle .moon {
  transform: translateY(-120%);
  opacity: 0;
}

:root[data-theme="light"] .theme-toggle .sun {
  transform: translateY(0);
  opacity: 1;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) .theme-toggle .moon {
    transform: translateY(-120%);
    opacity: 0;
  }
  :root:not([data-theme]) .theme-toggle .sun {
    transform: translateY(0);
    opacity: 1;
  }
}

/* ---------- keyframes ---------- */

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

@keyframes ripple {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  70%,
  100% {
    transform: scale(2.4);
    opacity: 0;
  }
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  50.01%,
  100% {
    opacity: 0;
  }
}

@keyframes fade {
  from {
    opacity: 0;
  }
}

@keyframes sheet-up {
  from {
    transform: translateY(16px);
    opacity: 0;
  }
}

@keyframes pop {
  from {
    transform: scale(0.98);
    opacity: 0;
  }
}

/* ---------- responsive ---------- */

@media (max-width: 520px) {
  .brand h1 {
    font-size: var(--fs-15);
  }
  .catalog-actions {
    flex: 1 1 100%;
    flex-wrap: wrap;
    justify-content: stretch;
  }
  .search {
    flex: 1 1 100%;
    max-width: none;
    order: -1;
  }
  .statusbar .spacer {
    display: none;
  }
  .tree-leaf .leaf-actions {
    opacity: 1;
  }
}

/* Mobile: no room for a split, so show one pane at a time. The catalog route
   shows the session list full-width; opening a session swaps to the terminal
   (its header's ← returns to the list). The connection still lives in the pool,
   so returning to it is instant. */
@media (max-width: 859px) {
  .app-shell[data-route="catalog"] > .content {
    display: none;
  }
  .app-shell:not([data-route="catalog"]) > .sidebar {
    display: none;
  }
  .sidebar {
    border-right: 0;
  }
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .brand-dot,
  [data-status="running"] .leaf-status::before,
  .tally-live::before {
    animation: none;
  }
}

/* ---------- debug HUD (#20) ---------- */

.debug-hud {
  position: fixed;
  right: var(--sp-3);
  bottom: var(--sp-3);
  z-index: var(--z-toast);
  min-width: 180px;
  max-width: 280px;
  padding: var(--sp-2) var(--sp-3);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-2);
  box-shadow: var(--shadow-2);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  line-height: 1.5;
  /* Diagnostics only — never intercept clicks on the terminal beneath it. */
  pointer-events: none;
  user-select: none;
}

.hud-head {
  color: var(--ink);
  font-weight: 600;
  margin-bottom: 2px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hud-row {
  display: flex;
  justify-content: space-between;
  gap: var(--sp-3);
}

.hud-k {
  color: var(--muted);
}

.hud-v {
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hud-v[data-activity="Active"] {
  color: var(--accent);
}

.hud-v[data-activity="AwaitingInput"] {
  color: var(--warn);
}

.hud-v[data-activity="Idle"] {
  color: var(--muted);
}

/* debug-HUD navbar toggle: lit when the HUD is on. */
.debug-toggle.is-active {
  color: var(--accent);
  border-color: var(--accent);
}

/* =========================================================================
   multi-view (#30 splits, #31 tabs, #33 highlights)
   Tabs of nested split trees; each session leaf hosts a live .attach. The
   focused pane reads at full strength, the rest recede — and the sidebar row
   for the focused session matches it (loud), open-elsewhere rows stay quiet.
   ========================================================================= */
.mv {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}
/* Mobile, single tab: the tab bar is pure chrome — collapse it (a floating ☰
   inside the pane keeps the sidebar drawer reachable). */
.mv-mobile-solo > .mv-tabs {
  display: none;
}

/* tab bar */
.mv-tabs {
  display: flex;
  align-items: stretch;
  gap: 2px;
  height: var(--bar-h);
  padding: 0 var(--sp-2);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
  flex: none;
}
.mv-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0 var(--sp-3);
  align-self: center;
  height: calc(var(--bar-h) - 8px);
  border-radius: var(--r-1);
  font: 500 var(--fs-12) / 1 var(--font-mono);
  color: var(--muted);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.mv-tab:hover {
  background: var(--surface-2);
  color: var(--ink);
}
.mv-tab.is-active {
  background: var(--surface-3);
  color: var(--ink);
  border-color: var(--border);
}
.mv-tab-close {
  opacity: 0.5;
  font-size: var(--fs-13);
  line-height: 1;
}
.mv-tab-close:hover {
  opacity: 1;
  color: var(--danger);
}
.mv-tab-add {
  align-self: center;
  width: 24px;
  height: 24px;
  border-radius: var(--r-1);
  color: var(--muted);
  font-size: var(--fs-15);
  background: transparent;
  border: none;
  cursor: pointer;
}
.mv-tab-add:hover {
  background: var(--surface-2);
  color: var(--ink);
}

/* canvas + welcome */
.mv-canvas {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  background: var(--bg);
}
.mv-canvas > .mv-split,
.mv-canvas > .mv-pane {
  position: absolute;
  inset: var(--sp-2);
}
.mv-canvas > .content-welcome {
  position: absolute;
  inset: 0;
  margin: auto;
  height: max-content;
}

/* splits + dividers */
.mv-split {
  display: flex;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
}
.mv-split.row {
  flex-direction: row;
}
.mv-split.col {
  flex-direction: column;
}
.mv-split > .mv-slot {
  min-width: 0;
  min-height: 0;
  display: flex;
}
.mv-split > .mv-slot > * {
  flex: 1;
  min-width: 0;
  min-height: 0;
}
.mv-divider {
  flex: none;
  position: relative;
  z-index: 2;
}
.mv-split.row > .mv-divider {
  width: 6px;
  cursor: col-resize;
}
.mv-split.col > .mv-divider {
  height: 6px;
  cursor: row-resize;
}
.mv-divider::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--border);
}
.mv-split.row > .mv-divider::after {
  width: 1px;
  height: 100%;
}
.mv-split.col > .mv-divider::after {
  height: 1px;
  width: 100%;
}
.mv-divider:hover::after,
.mv-divider.is-dragging::after {
  background: var(--accent);
}

/* a single pane = wrapper around a live .attach (or an empty placeholder) */
.mv-pane {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-2);
  overflow: hidden;
  background: var(--term-bg);
}
.mv-pane-host {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
}
.mv-pane-host > .attach {
  flex: 1;
  min-width: 0;
  min-height: 0;
}
/* per-session colour strip — maps a pane to its sidebar row */
.mv-pane::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--mv-color, transparent);
  z-index: 3;
  pointer-events: none;
}
/* focused pane: accent ring + glow, full strength */
.mv-pane.is-focused {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent), 0 0 22px -8px var(--accent-ring);
}
/* unfocused panes recede so the eye finds the live one */
.mv-pane:not(.is-focused) {
  border-color: color-mix(in oklab, var(--border) 70%, transparent);
}
.mv-pane:not(.is-focused) .attach-body {
  opacity: 0.45;
}
.mv-pane:not(.is-focused) .attach-header {
  opacity: 0.7;
}
/* per-pane back button is meaningless in multi-view (use Close pane instead) */
.mv-pane .attach-header .back {
  display: none;
}

/* Draft pane (#57): an empty pane renders the shared spawn form inline.
   The host is already a flex column; the form fills and scrolls within it. */
.mv-pane-host > .mv-draft {
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
  /* The modal form got its stacking and padding from `.modal-body`; in a pane
     the form is the host, so it carries them itself. */
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  padding: var(--sp-3);
}

/* pane tools cluster (disconnect / split / close), top-right corner. The attach
   header's own disconnect button is hidden — ⏻ lives here as the leftmost tool. */
.mv-pane-tools {
  position: absolute;
  top: 6px;
  right: 4px;
  z-index: 4;
  display: flex;
  gap: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.mv-pane .attach-header .disconnect {
  display: none;
}
.mv-tool-off:hover {
  background: var(--danger-tint);
  color: var(--danger);
}
.mv-pane:hover .mv-pane-tools {
  opacity: 1;
  pointer-events: auto;
}
/* The tools share the header's right corner with the connection-state label, so
   hide that label while hovering (tools showing) — no overlap. */
.mv-pane:hover .attach-state {
  visibility: hidden;
}
/* "connected" is noise — a streaming terminal already shows it's connected. Only
   the transient/meaningful states surface (connecting/error); a closed session
   auto-closes its pane, so "closed" is rarely seen. */
.attach-state[data-state="open"] {
  display: none;
}
.mv-tool {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: var(--r-1);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--muted);
  font-size: var(--fs-12);
  cursor: pointer;
}
.mv-tool:hover {
  background: var(--surface-3);
  color: var(--ink);
}

/* drag-to-dock (issue #32): a cursor-following ghost + the target pane's drop
   zone highlight. */
.mv-drag-ghost {
  position: fixed;
  z-index: var(--z-toast);
  pointer-events: none;
  padding: 2px 10px;
  border-radius: var(--r-2);
  background: var(--surface-3);
  border: 1px solid var(--accent);
  color: var(--ink);
  font: 600 var(--fs-12) / 1.4 var(--font-mono);
  box-shadow: var(--shadow-2);
}
.mv-dock-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  pointer-events: none;
}
.mv-dock-zone {
  background: color-mix(in oklab, var(--accent) 30%, transparent);
  border: 1px solid var(--accent);
  border-radius: var(--r-1);
}

/* sidebar two-tier highlight + colour dot (issue #33).
   .is-active = focused pane (loud, from existing rule); .is-open = open
   elsewhere (quiet). The dot uses the session's colour so a row maps to a pane. */
.tree-leaf.is-open {
  background: color-mix(in oklab, var(--accent) 6%, transparent);
}
.tree-leaf.is-open::after,
.tree-leaf.is-active::after {
  content: "";
  position: absolute;
  right: 9px;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  background: var(--mv-color, var(--accent));
  pointer-events: none;
}
.tree-leaf.is-open::after {
  opacity: 0.7;
}
.tree-leaf.is-active::after {
  box-shadow: 0 0 8px var(--mv-color, var(--accent-ring));
}

/* =========================================================================
   multi-view mobile (#35): below 860px the split tree projects to a pill strip
   with one pane visible; the sidebar becomes an off-canvas drawer (☰).
   ========================================================================= */
.mv-backdrop {
  display: none;
}

.mv-mobile {
  position: absolute;
  /* Flush to the edges — a single full-screen pane needs no canvas inset. */
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}
/* One pane fills the screen: no border, radius, or focus ring to box it in. */
.mv-mobile > .mv-pane,
.mv-mobile > .mv-pane.is-focused {
  border: none;
  border-radius: 0;
  box-shadow: none;
}
.mv-panebar {
  display: flex;
  gap: 4px;
  padding: var(--sp-1) var(--sp-2);
  overflow-x: auto;
  scrollbar-width: none;
  flex: none;
}
.mv-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 7px var(--sp-3);
  border-radius: var(--r-1);
  background: var(--surface-2);
  color: var(--muted);
  font: 600 var(--fs-12) / 1 var(--font-mono);
  white-space: nowrap;
  cursor: pointer;
  border: 1px solid transparent;
}
.mv-pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mv-color, var(--faint));
  flex: none;
}
.mv-pill.is-active {
  background: var(--accent-tint);
  color: var(--accent-strong);
  border-color: var(--accent-ring);
}
.mv-mobile > .mv-pane {
  flex: 1;
  min-height: 0;
}

@media (max-width: 859px) {
  .app-menu {
    display: inline-grid;
  }

  /* sidebar → off-canvas drawer (override the route-based show/hide) */
  .app-shell > .sidebar {
    display: flex !important;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: min(82vw, 320px);
    z-index: var(--z-modal);
    transform: translateX(-100%);
    transition: transform var(--dur) var(--ease-out);
    box-shadow: var(--shadow-2);
    border-right: 1px solid var(--border);
  }
  .app-shell.drawer-open > .sidebar {
    transform: none;
  }
  /* content always visible (the layout/projection); drawer floats over it */
  .app-shell[data-route="catalog"] > .content,
  .app-shell > .content {
    display: flex;
  }
  .app-shell.drawer-open > .mv-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: var(--z-backdrop);
    background: oklch(0 0 0 / 0.5);
  }
}