/* ═══════════════════════════════════════════════════════════════
   PyPTO IDE Assistant — Layout & Shell Styles
   ═══════════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* ── Mapped to PTO design tokens ─────────────────────────────── */
  --bg-base:        var(--background);           /* #0b1220 */
  --bg-panel:       var(--background-elevated);  /* #14181f */
  --bg-panel2:      var(--surface-1);            /* #11161c */
  --bg-hover:       var(--surface-2);            /* #171d25 */
  --bg-active:      var(--surface-3);            /* #1d2530 */
  --bg-selected:    var(--state-selected);       /* rgba(67,105,239,0.14) */
  --border:         var(--border-default);       /* rgba(255,255,255,0.10) */
  --border-light:   var(--border-strong);        /* rgba(255,255,255,0.16) */

  --text-primary:   var(--foreground);           /* #eaeaea */
  --text-secondary: var(--foreground-secondary); /* #b3b3b3 */
  --text-muted:     var(--foreground-muted);     /* #8b8f97 */
  --text-accent:    var(--accent);               /* #7c8db8 */

  --accent-blue:    var(--primary);              /* #4369ef */
  --accent-green:   var(--success);              /* #04d793 */
  --accent-orange:  var(--warning);              /* #ffaa3b */
  --accent-purple:  #a78bfa;
  --accent-red:     var(--danger);               /* #ff4b7b */
  --accent-yellow:  var(--warning);              /* #ffaa3b */

  /* ── Layout ──────────────────────────────────────────────────── */
  --titlebar-h:     44px;
  --statusbar-h:    24px;
  --activity-w:     46px;
  --ai-panel-w:     360px;

  font-family: var(--font-mono);
  font-size: 13px;
  line-height: var(--line-height-body);
  color: var(--foreground);
  background: var(--background);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* ──────────── SCROLLBAR ──────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-active); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ══════════════════════════════════════════════════════════════
   TOOLBAR (PTO unified)
   ══════════════════════════════════════════════════════════════ */
.toolbar {
  height: var(--titlebar-h);
  background: color-mix(in srgb, var(--bg-base) 92%, black);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  gap: 12px;
  flex-shrink: 0;
  backdrop-filter: blur(12px);
  z-index: 100;
}

.toolbar-l,
.toolbar-r {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.home-link {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.home-link:hover {
  background: rgba(255, 255, 255, 0.10);
  border-color: var(--border-light);
  color: var(--text-primary);
}

.toolbar-sep {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 2px;
  flex-shrink: 0;
}

.app-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.chip {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 3px;
  letter-spacing: 0.4px;
  white-space: nowrap;
}
.chip--blue  { background: #172554; color: #60a5fa; }
.chip--green { background: #064e3b; color: #34d399; }

.toolbar-tabs {
  display: flex;
  gap: 2px;
  background: var(--bg-base);
  border-radius: 6px;
  padding: 3px;
}

.tb-tab {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 14px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.tb-tab:hover { background: var(--bg-hover); color: var(--text-secondary); }
.tb-tab.active { background: var(--bg-active); color: var(--text-primary); font-weight: 500; }

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 6px var(--accent-green);
  animation: pulse-green 2s ease-in-out infinite;
}
@keyframes pulse-green {
  0%,100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.status-text { font-size: 11px; color: var(--accent-green); }

.tb-btn {
  padding: 4px 12px;
  background: var(--bg-active);
  border: none;
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s;
}
.tb-btn:hover { background: var(--bg-hover); }

/* ══════════════════════════════════════════════════════════════
   MAIN LAYOUT
   ══════════════════════════════════════════════════════════════ */
#main-layout {
  display: flex;
  flex-direction: row;
  height: calc(100vh - var(--titlebar-h) - var(--statusbar-h));
  overflow: hidden;
  padding: 12px;
  background: var(--bg-base);
}

/* ──────────── ACTIVITY BAR ──────────── */
#activity-bar { display: none; }
#activity-bar-hidden {
  width: var(--activity-w);
  background: var(--bg-base);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 0;
  flex-shrink: 0;
  gap: 4px;
}

.ab-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 100%;
}
.ab-group.ab-bottom { margin-top: auto; }

.ab-btn {
  width: 36px; height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
}
.ab-btn svg { width: 18px; height: 18px; }
.ab-btn:hover { background: var(--bg-hover); color: var(--text-secondary); }
.ab-btn.active {
  color: var(--accent-blue);
  background: var(--bg-active);
}
.ab-btn.active::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 2px; height: 20px;
  background: var(--accent-blue);
  border-radius: 0 2px 2px 0;
}

/* ──────────── EDITOR AREA ──────────── */
#editor-area {
  flex: 1 1 0;
  min-width: 0;
  position: relative;
  overflow: hidden;
}

/* ──────────── SCENARIOS ──────────── */
.scenario {
  display: none;
  flex-direction: row;
  height: 100%;
  width: 100%;
  overflow: hidden;
  gap: 12px;
}
.scenario.active { display: flex; }

/* ──────────── PANELS (card style) ──────────── */
.panel {
  display: flex;
  flex-direction: column;
  background: var(--bg-panel2);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  min-height: 0;
}
.panel-center { flex: 1 1 0; }
.flex-grow { flex: 1 1 0; min-width: 0; }

.panel-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  height: 36px;
  background: transparent;
  flex-shrink: 0;
}

.ph-icon { font-size: 13px; line-height: 1; }
.ph-title { font-size: 12px; font-weight: 600; color: var(--text-primary); flex: 1 1 auto; }
.ph-badge {
  font-size: 10px; padding: 1px 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px; color: var(--text-muted);
}

.ph-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.ph-act-btn {
  padding: 2px 8px;
  background: transparent;
  border: none;
  border-radius: 3px;
  color: var(--text-secondary);
  font-size: 10px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.ph-act-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.ph-act-btn.active-toggle { background: var(--bg-active); color: var(--accent-blue); }

.panel-body {
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
}
.panel-body.scroll { overflow-y: auto; padding: 14px; }
.panel-body.flex-col { display: flex; flex-direction: column; }

/* ══════════════════════════════════════════════════════════════
   STATUS BAR
   ══════════════════════════════════════════════════════════════ */
#statusbar {
  height: var(--statusbar-h);
  background: var(--accent-blue);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px;
  flex-shrink: 0;
  font-size: 11px;
  color: var(--primary-foreground);
}

.sb-left, .sb-right { display: flex; align-items: center; gap: 12px; }
.sb-item { white-space: nowrap; }
.sb-branch { color: var(--primary-foreground); font-weight: 500; }

/* ══════════════════════════════════════════════════════════════
   AI SIDE PANEL
   ══════════════════════════════════════════════════════════════ */
#ai-side-panel {
  position: fixed;
  right: 0; top: var(--titlebar-h);
  width: var(--ai-panel-w);
  height: calc(100vh - var(--titlebar-h) - var(--statusbar-h));
  background: var(--bg-panel2);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 200;
  box-shadow: -4px 0 20px rgba(0,0,0,0.4);
  transition: transform 0.2s ease;
}
#ai-side-panel.hidden {
  transform: translateX(100%);
  pointer-events: none;
}

.asp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  flex-shrink: 0;
}
.asp-title { font-size: 13px; font-weight: 600; color: var(--accent-purple); }
.asp-close {
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 14px; padding: 2px;
  border-radius: 3px; transition: color 0.15s;
}
.asp-close:hover { color: var(--text-primary); }

.asp-tabs {
  display: flex;
  flex-shrink: 0;
  background: var(--bg-base);
  padding: 3px;
  gap: 2px;
}
.asp-tab {
  flex: 1;
  padding: 5px 0;
  background: none;
  border: none;
  border-radius: 4px;
  color: var(--text-muted);
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}
.asp-tab:hover { background: var(--bg-hover); color: var(--text-primary); }
.asp-tab.active { background: var(--bg-active); color: var(--accent-blue); }

.asp-body {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.asp-body.hidden { display: none; }

/* ══════════════════════════════════════════════════════════════
   CHAT UI
   ══════════════════════════════════════════════════════════════ */
.chat-messages {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.chat-messages.short { max-height: 180px; min-height: 80px; }
.chat-messages.tall  { min-height: 0; flex: 1; }

.chat-msg {
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.chat-msg.user { flex-direction: row-reverse; }

.cm-avatar {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--bg-active);
  display: flex; align-items: center; justify-content: center;
  font-size: 9px; font-weight: 700; color: var(--accent-blue);
  flex-shrink: 0;
}
.chat-msg.user .cm-avatar {
  color: var(--accent-green);
}

.cm-bubble {
  max-width: 86%;
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.6;
  background: var(--bg-active);
  color: var(--text-secondary);
}
.chat-msg.user .cm-bubble {
  background: var(--bg-selected);
  color: var(--text-primary);
}
.cm-bubble code {
  background: var(--bg-base);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 11px;
  color: var(--text-accent);
}

.chat-input-area {
  display: flex;
  gap: 6px;
  padding: 8px;
  flex-shrink: 0;
  background: var(--bg-panel2);
}
.chat-input {
  flex: 1;
  background: var(--bg-base);
  border: none;
  border-radius: 6px;
  padding: 6px 8px;
  color: var(--text-primary);
  font-size: 12px;
  font-family: inherit;
  resize: none;
  height: 54px;
  line-height: 1.5;
}
.chat-input:focus { outline: none; }

.chat-send {
  width: 32px; height: 54px;
  background: var(--accent-blue);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  transition: background 0.15s;
  flex-shrink: 0;
}
.chat-send:hover { background: #2563eb; }

.chat-divider {
  padding: 6px 12px;
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-base);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  flex-shrink: 0;
}

/* ══════════════════════════════════════════════════════════════
   FILE TABS / CODE PANES
   ══════════════════════════════════════════════════════════════ */
.file-tabs {
  display: flex;
  gap: 2px;
  border-radius: 4px;
  padding: 2px;
  background: var(--bg-base);
}
.ftab {
  padding: 2px 10px;
  background: transparent;
  border: none;
  border-radius: 3px;
  color: var(--text-muted);
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.12s;
}
.ftab.active { background: var(--bg-active); color: var(--text-primary); }
.ftab:hover:not(.active) { color: var(--text-secondary); }

.code-pane {
  display: none;
  height: 100%;
  overflow-y: auto;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-base);
}
.code-pane.active { display: block; }
.code-pane pre {
  padding: 16px 20px;
  margin: 0;
  white-space: pre;
  font-family: inherit;
  counter-reset: lines;
}
.code-pane .line {
  display: block;
  padding-left: 44px;
  position: relative;
  min-height: 20px;
}
.code-pane .line::before {
  counter-increment: lines;
  content: counter(lines);
  position: absolute;
  left: 0; width: 36px;
  text-align: right;
  color: var(--text-muted);
  user-select: none;
  font-size: 11px;
}
.code-pane .line:hover { background: var(--bg-hover); }

/* Syntax tokens */
.tok-kw  { color: #ff7b72; }
.tok-fn  { color: #d2a8ff; }
.tok-str { color: #a5d6ff; }
.tok-num { color: #79c0ff; }
.tok-cmt { color: #8b949e; font-style: italic; }
.tok-dec { color: #ffa657; }
.tok-cls { color: #f0883e; }
.tok-id  { color: #c9d1d9; }

/* ══════════════════════════════════════════════════════════════
   GRAPH SVG
   ══════════════════════════════════════════════════════════════ */
#precision-graph {
  background: var(--bg-base);
  cursor: grab;
}
#precision-graph:active { cursor: grabbing; }

.graph-legend {
  position: absolute;
  bottom: 10px; left: 10px;
  display: flex;
  gap: 12px;
  background: rgba(11,18,32,0.88);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 5px 10px;
  pointer-events: none;
}
.gl-item { display: flex; align-items: center; gap: 5px; font-size: 10px; color: var(--text-secondary); }
.gl-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

/* ══════════════════════════════════════════════════════════════
   SWIMLANE CANVAS
   ══════════════════════════════════════════════════════════════ */
#swimlane-canvas {
  position: absolute;
  top: 0; left: 0;
  cursor: default;
}

.canvas-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  pointer-events: none;
}

.timeline-ruler {
  height: 28px;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
  font-size: 10px;
  color: var(--text-muted);
}

.task-tooltip {
  position: absolute;
  background: var(--bg-base);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 11px;
  color: var(--text-secondary);
  pointer-events: none;
  z-index: 50;
  min-width: 160px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
}
.task-tooltip.hidden { display: none; }

/* ══════════════════════════════════════════════════════════════
   CONSTRAINT PANEL
   ══════════════════════════════════════════════════════════════ */
.constraint-panel {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: rgba(11,18,32,0.96);
  border-top: 1px solid var(--border-light);
  padding: 10px 14px;
  max-height: 220px;
  overflow-y: auto;
  z-index: 10;
}
.constraint-panel.hidden { display: none; }

.ct-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-yellow);
}
.ct-header button {
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 13px;
}

/* ══════════════════════════════════════════════════════════════
   MISC UTILITIES
   ══════════════════════════════════════════════════════════════ */
.code-placeholder, .cp-icon, .cp-text, .opt-placeholder { text-align: center; }
.code-placeholder {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  height: 100%;
  gap: 12px;
}
.cp-icon { font-size: 32px; color: var(--text-muted); opacity: 0.4; }
.cp-text { font-size: 12px; color: var(--text-muted); line-height: 1.7; }
.opt-placeholder { font-size: 12px; color: var(--text-muted); padding: 20px 0; }

.bubble-dot {
  width: 8px; height: 8px; border-radius: 2px;
  background: repeating-linear-gradient(45deg, #ef4444 0 2px, transparent 0 4px);
  border: 1px solid #ef4444;
}

.legend-row {
  display: flex; align-items: center; gap: 6px;
  font-size: 10px; color: var(--text-secondary);
}
.lg-dot { width: 8px; height: 8px; border-radius: 2px; flex-shrink: 0; }