/* ══════════════════════════════════════════════════════════
   LAYOUT — title bar, main grid, sidebar, editor, preview,
            resize handles, status bar
   ══════════════════════════════════════════════════════════ */

/* ── Title bar ────────────────────────────────────────── */
#titlebar {
  height: var(--th);
  background: rgba(17,17,17,0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 10px;
  position: relative;
  z-index: 100;
  user-select: none;
  flex-shrink: 0;
  transition: background var(--trans), border-color var(--trans);
}

[data-theme="light"] #titlebar {
  background: rgba(245,245,247,0.9);
}

.app-title {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  pointer-events: none;
}

.toolbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Main area ────────────────────────────────────────── */
#main {
  display: flex;
  overflow: hidden;
  height: calc(100vh - var(--th) - var(--sh));
}

/* ── Sidebar ──────────────────────────────────────────── */
#sidebar {
  width: var(--sw);
  min-width: 140px;
  max-width: 380px;
  background: rgba(20,20,20,0.65);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
  transition: background var(--trans);
}

[data-theme="light"] #sidebar {
  background: rgba(240,240,242,0.75);
}

/* ── Resize handles ───────────────────────────────────── */
.rsz-h {
  width: 4px;
  background: transparent;
  cursor: col-resize;
  flex-shrink: 0;
  transition: background var(--trans);
  position: relative;
  z-index: 10;
}
.rsz-h:hover, .rsz-h.drag { background: var(--accent); }

.rsz-v {
  height: 4px;
  background: transparent;
  cursor: row-resize;
  flex-shrink: 0;
  transition: background var(--trans);
  position: relative;
  z-index: 10;
}
.rsz-v:hover, .rsz-v.drag { background: var(--accent); }

/* ── Editor pane ──────────────────────────────────────── */
#ed-pane {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#ed-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
}

#editor { height: 100%; }

/* ── Console panel ────────────────────────────────────── */
#console-panel {
  height: var(--ch);
  min-height: 50px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
  transition: background var(--trans), border-color var(--trans);
}

/* ── Preview pane ─────────────────────────────────────── */
#preview-pane {
  width: var(--pw);
  min-width: 180px;
  max-width: 900px;
  background: var(--card);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  transition: background var(--trans);
}
#preview-pane.hidden { display: none; }

#preview-frame {
  flex: 1;
  border: none;
  background: #fff;
  width: 100%;
}

/* ── Status bar ───────────────────────────────────────── */
#statusbar {
  height: var(--sh);
  background: rgba(0,255,136,0.06);
  border-top: 1px solid rgba(0,255,136,0.12);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: background var(--trans);
}

[data-theme="light"] #statusbar {
  background: rgba(0,168,85,0.07);
  border-top-color: rgba(0,168,85,0.18);
}

.s-sep { color: var(--border); }

#s-lang {
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  transition: color var(--trans);
}
#s-lang:hover { color: var(--accent-dim); }

#s-msg {
  margin-left: auto;
  transition: color var(--trans);
}
#s-msg.ok   { color: var(--accent); }
#s-msg.err  { color: var(--error); }
#s-msg.busy { color: var(--warning); }