/* ── Reset & base ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── LIGHT MODE — Glaucous / Periwinkle / Yellow / Tomato palette ───── */
/*   #7776bc Glaucous · #cdc7e5 Periwinkle · #fffbdb Light Yellow        */
/*   #ffec51 Banana Cream · #ff674d Tomato                                */
:root {
  --header-h: 52px;
  --bg:              #fffbdb;   /* Light Yellow — page bg */
  --surface:         #ffffff;
  --border:          #cdc7e5;   /* Periwinkle */

  /* Header */
  --header-bg:       #7776bc;   /* Glaucous */
  --header-fg:       #ffffff;
  --header-border:   rgba(255,255,255,0.18);

  /* Accent */
  --accent:          #ff674d;   /* Tomato */
  --accent-hover:    #e0503a;

  /* Badges */
  --badge-bg:        #ff674d;   /* Tomato */
  --badge-fg:        #fff;

  /* Buttons */
  --btn-bg:          #7776bc;   /* Glaucous */
  --btn-fg:          #ffffff;
  --btn-hover-bg:    #ff674d;   /* Tomato on hover */
  --btn-hover-fg:    #ffffff;

  /* Pane labels */
  --label-bg:        #5a59a0;   /* slightly darker Glaucous */
  --label-fg:        #cdc7e5;   /* Periwinkle */

  /* Status bar */
  --status-bar-bg:   #5a59a0;
  --status-bar-border: rgba(255,255,255,0.1);
  --status-fg:       #cdc7e5;
  --credit-fg:       #a8a6d8;

  /* Splitter */
  --splitter-bg:     #7776bc;
  --splitter-hover:  #ff674d;

  /* Diagram pane */
  --diagram-bg:      #fffbdb;   /* Light Yellow */
  --diagram-label-bg: #5a59a0;
  --empty-fg:        #a8a6d0;

  /* Select */
  --select-option-bg: #5a59a0;
  --select-option-fg: #ffffff;

  /* Zoom level text */
  --zoom-fg:         #cdc7e5;
  font-size: 14px;
}

/* ── DARK MODE (commented out for now) ─────────────────────────────── */
/*
body.dark {
  --bg:              #0f0f1a;
  --surface:         #1a1a2e;
  --border:          #2d2d4e;
  --header-bg:       #0d0d1a;
  --header-fg:       #e2e8f0;
  --header-border:   rgba(255,255,255,0.07);
  --accent:          #6366f1;
  --accent-hover:    #4f46e5;
  --badge-bg:        #6366f1;
  --badge-fg:        #fff;
  --btn-bg:          #16213e;
  --btn-fg:          #a8b2c3;
  --btn-hover-bg:    #1f2e5e;
  --btn-hover-fg:    #ffffff;
  --label-bg:        #0d0d1a;
  --label-fg:        #4a5568;
  --status-bar-bg:   #0d0d1a;
  --status-bar-border: rgba(255,255,255,0.05);
  --status-fg:       #4a5568;
  --credit-fg:       #3a4558;
  --splitter-bg:     #1a1a2e;
  --splitter-hover:  #6366f1;
  --diagram-bg:      #1a1a2e;
  --diagram-label-bg: #0d0d1a;
  --empty-fg:        #3a4568;
  --select-option-bg: #0d0d1a;
  --select-option-fg: #e2e8f0;
  --zoom-fg:         #4a5568;
}
*/

/* ── Body ────────────────────────────────────────────────────────────── */
body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: #1e293b;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
/* body.dark { color: #e2e8f0; } */

/* ── Header ─────────────────────────────────────────────────────────── */
#app-header {
  height: var(--header-h);
  background: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
  flex-shrink: 0;
  z-index: 10;
}

#app-header h1 {
  font-size: 15px;
  font-weight: 700;
  color: var(--header-fg);
  letter-spacing: 0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

#app-header h1 span { color: var(--accent); }

/* ── Pattern badges ─────────────────────────────────────────────────── */
#pattern-badges {
  display: flex;
  gap: 6px;
  flex: 1;
  flex-wrap: wrap;
  min-width: 0;
}

.badge {
  background: var(--badge-bg);
  color: var(--badge-fg);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 999px;
  white-space: nowrap;
  letter-spacing: 0.03em;
  animation: badge-in 0.2s ease;
}

@keyframes badge-in {
  from { opacity: 0; transform: scale(0.8); }
  to   { opacity: 1; transform: scale(1); }
}

/* ── Header controls ────────────────────────────────────────────────── */
.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.hbtn, #example-select {
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 6px;
  padding: 5px 12px;
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
  font-family: inherit;
  height: 30px;
  display: flex;
  align-items: center;
}

.hbtn:hover, #example-select:hover {
  background: var(--btn-hover-bg);
  color: var(--btn-hover-fg);
}

#example-select option {
  background: var(--select-option-bg);
  color: var(--select-option-fg);
}

/* ── Split container ────────────────────────────────────────────────── */
#split-container {
  display: grid;
  grid-template-columns: 1fr 6px 1fr;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

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

.pane-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 12px;
  background: var(--label-bg);
  color: var(--label-fg);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.CodeMirror {
  flex: 1 !important;
  height: 100% !important;
  font-size: 13px !important;
  line-height: 1.6 !important;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, 'Cascadia Code', monospace !important;
  border: none !important;
  border-radius: 0 !important;
}

.CodeMirror-scroll { height: 100% !important; }

/* ── Splitter ───────────────────────────────────────────────────────── */
#splitter {
  width: 100%;
  background: var(--splitter-bg);
  cursor: col-resize;
  position: relative;
  z-index: 5;
  transition: background 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

#splitter:hover { background: var(--splitter-hover); }

#splitter::after {
  content: '';
  display: block;
  width: 2px;
  height: 32px;
  background: rgba(255,255,255,0.15);
  border-radius: 1px;
}

/* ── Diagram pane ───────────────────────────────────────────────────── */
#diagram-pane {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  background: var(--diagram-bg);
  transition: background 0.2s;
}

#diagram-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: var(--diagram-label-bg);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  flex-shrink: 0;
}

#diagram-output {
  flex: 1;
  overflow: auto;
  padding: 24px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  background: var(--diagram-bg);
  transition: background 0.2s;
}

#diagram-output svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.10));
  transition: filter 0.2s;
}

/* body.dark #diagram-output svg {
  filter: drop-shadow(0 2px 12px rgba(0,0,0,0.45));
} */

.empty-state {
  color: var(--empty-fg);
  font-size: 13px;
  text-align: center;
  margin-top: 60px;
  line-height: 2;
  padding: 0 32px;
}

/* ── Zoom controls ──────────────────────────────────────────────────── */
#zoom-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}

.zbtn {
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  width: 24px;
  height: 24px;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.1s;
  line-height: 1;
}
.zbtn:hover { background: var(--btn-hover-bg); color: var(--btn-hover-fg); }

#zoom-level {
  font-size: 11px;
  color: var(--zoom-fg);
  min-width: 36px;
  text-align: center;
  font-family: ui-monospace, monospace;
}

/* ── Status bar ─────────────────────────────────────────────────────── */
#status-bar {
  height: 28px;
  background: var(--status-bar-bg);
  border-top: 1px solid var(--status-bar-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  flex-shrink: 0;
}

.status {
  font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  transition: color 0.2s;
}
.status-idle  { color: #cdc7e5; }
.status-busy  { color: #ffec51; }
.status-ok    { color: #10b981; }
.status-error { color: #ff674d; }

/* body.dark .status-idle { color: #4a5568; } */
/* body.dark .status-busy  { color: #f59e0b; } */

.status-credit {
  font-size: 11px;
  color: var(--credit-fg);
  font-family: system-ui, sans-serif;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.status-credit a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.status-credit a:hover { text-decoration: underline; }

/* ── Autocomplete dropdown ──────────────────────────────────────────── */
.CodeMirror-hints {
  background: #1e1c3a !important;
  border: 1px solid #7776bc !important;
  border-radius: 6px !important;
  box-shadow: 0 6px 20px rgba(0,0,0,0.3) !important;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace !important;
  font-size: 12px !important;
  padding: 4px 0 !important;
  z-index: 100 !important;
  max-height: 220px !important;
}

.CodeMirror-hint {
  color: #cdc7e5 !important;
  padding: 3px 14px !important;
  border-radius: 0 !important;
  white-space: nowrap !important;
}

li.CodeMirror-hint-active {
  background: #7776bc !important;
  color: #ffffff !important;
}

/* ── Lint error markers ─────────────────────────────────────────────── */
.CodeMirror-lint-mark-error {
  border-bottom: 2px wavy #ff674d;
}

.CodeMirror-lint-marker-error {
  background: none;
  width: 4px;
  height: 100%;
  background-color: #ff674d;
}

.CodeMirror-lint-tooltip {
  background: #1e1c3a !important;
  border: 1px solid #ff674d !important;
  color: #fca5a5 !important;
  border-radius: 5px !important;
  font-family: ui-monospace, monospace !important;
  font-size: 12px !important;
  padding: 6px 10px !important;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3) !important;
}

/* ── Syntax reference panel ─────────────────────────────────────────── */
#editor-pane { position: relative; }

#syntax-ref-panel {
  position: absolute;
  top: 32px;        /* sits just below the pane label */
  right: 0;
  width: 300px;
  max-height: calc(100% - 32px);
  overflow-y: auto;
  background: #1e1c3a;
  border-left: 2px solid #7776bc;
  z-index: 20;
  padding: 10px 12px 16px;
  scrollbar-width: thin;
  scrollbar-color: #7776bc transparent;
  box-shadow: -4px 0 16px rgba(0,0,0,0.25);
}

#syntax-ref-panel::-webkit-scrollbar { width: 5px; }
#syntax-ref-panel::-webkit-scrollbar-thumb {
  background: #7776bc;
  border-radius: 3px;
}

.ref-close {
  display: block;
  text-align: right;
  cursor: pointer;
  font-size: 12px;
  color: #7776bc;
  padding: 2px 4px;
  line-height: 1;
  margin-bottom: 8px;
}
.ref-close:hover { color: #ff674d; }

.ref-section { margin-bottom: 14px; }

.ref-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #ff674d;
  margin-bottom: 5px;
}

.ref-snippet {
  background: #14122e;
  border: 1px solid rgba(119,118,188,0.25);
  border-radius: 4px;
  padding: 7px 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
  font-size: 11px;
  line-height: 1.6;
  color: #cdc7e5;
  white-space: pre;
  overflow-x: auto;
  margin: 0;
}

/* ── Syntax ref toggle button ───────────────────────────────────────── */
.ref-toggle {
  margin-left: auto;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  width: 18px;
  height: 18px;
  font-size: 11px;
  font-weight: 700;
  color: var(--label-fg);
  cursor: pointer;
  line-height: 1;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 8px;
  transition: background 0.15s, color 0.15s;
  font-family: inherit;
}

.ref-toggle:hover,
.ref-toggle-active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ── Keyboard hint ──────────────────────────────────────────────────── */
.kbd {
  display: inline-block;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 3px;
  padding: 1px 5px;
  font-family: ui-monospace, monospace;
  font-size: 10px;
  color: var(--label-fg);
  margin-left: 6px;
}

/* ── Two-way class highlighting ─────────────────────────────────────── */

/* Editor: active class lines — subtle tint + left accent bar */
.lld-editor-active {
  background: rgba(119, 118, 188, 0.10) !important;
  border-left: 3px solid #7776bc !important;
}

/* Diagram: highlight rect is injected as SVG <rect class="lld-highlight-overlay">
   directly into the class-box group via getBBox(). No CSS needed for the overlay
   itself — it's styled via SVG attributes (stroke, fill, rx). */

/* ── Scrollbars ─────────────────────────────────────────────────────── */
#diagram-output::-webkit-scrollbar { width: 8px; height: 8px; }
#diagram-output::-webkit-scrollbar-track { background: transparent; }
#diagram-output::-webkit-scrollbar-thumb {
  background: rgba(100,80,60,0.2);
  border-radius: 4px;
}
#diagram-output::-webkit-scrollbar-thumb:hover {
  background: rgba(100,80,60,0.4);
}
body.dark #diagram-output::-webkit-scrollbar-thumb {
  background: rgba(100,100,120,0.3);
}

/* ── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  #split-container { grid-template-columns: 1fr 0 0; }
  #splitter, #diagram-pane { display: none; }
}