/* ================================================================
   PDF Editor Pro — Premium Dark Theme Design System
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&family=Caveat:wght@400;700&display=swap');

/* ----------------------------------------------------------------
   CSS Custom Properties
   ---------------------------------------------------------------- */
:root {
  --bg-app:       #0d1117;
  --bg-bar:       #161b22;
  --bg-panel:     #1c2333;
  --bg-card:      #21262d;
  --bg-hover:     #30363d;
  --bg-active:    #388bfd1a;

  --accent:       #F59E0B;
  --accent-2:     #D97706;
  --accent-light: #FBBF24;
  --accent-glow:  rgba(245,158,11,0.25);
  --accent-text:  #FBBF24;
  --pdf-surface:  #2d2d35;
  --pdf-grid:     #333341;
  --pdf-glow:     rgba(245,158,11,0.03);

  --text-primary:   #e6edf3;
  --text-secondary: #8b949e;
  --text-muted:     #484f58;

  --border:         #30363d;
  --border-subtle:  #21262d;

  --shadow-sm:  0 1px 4px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-xl:  0 16px 64px rgba(0,0,0,0.7);

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;

  --font:       'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-head:  'Outfit', 'DM Sans', -apple-system, sans-serif;
  --font-mono:  'Courier New', monospace;

  --menubar-h:  44px;
  --toolbar-h:  80px;   /* 2 rows: 48px tools + 32px props */
  --statusbar-h: 28px;
  --sidebar-w:  220px;
  --props-w:    220px;
  --tool-sidebar-w: 48px;
}

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

html, body {
  width: 100%; height: 100%; overflow: hidden;
  font-family: var(--font);
  background: var(--bg-app);
  color: var(--text-primary);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

button { font-family: var(--font); cursor: pointer; border: none; outline: none; }
input, select, textarea { font-family: var(--font); outline: none; }
a { color: var(--accent-text); text-decoration: none; }

/* ----------------------------------------------------------------
   App Shell
   ---------------------------------------------------------------- */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
  max-width: 100%;
  overflow: hidden;
}

/* ----------------------------------------------------------------
   Menu Bar
   ---------------------------------------------------------------- */
#menu-bar {
  height: var(--menubar-h);
  background: var(--bg-bar);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 8px;
  flex-shrink: 0;
  z-index: 200;
  box-shadow: var(--shadow-sm);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.2s;
  flex-shrink: 0;
}
.logo:hover { background: var(--bg-hover); }
.logo-icon { width: 22px; height: 22px; flex-shrink: 0; }
.logo-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}
.logo-pro {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}

/* Menu Navigation */
.menu-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.menu-item {
  position: relative;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  user-select: none;
  transition: all 0.15s;
}
.menu-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Dropdown */
.dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 200px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 500;
  padding: 4px;
  animation: dropdownIn 0.15s ease;
}
@keyframes dropdownIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.menu-item:hover .dropdown,
.menu-item:focus-within .dropdown { display: block; }

.dropdown button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--text-primary);
  font-size: 13px;
  transition: background 0.15s;
}
.dropdown button:hover { background: var(--bg-hover); }
.dropdown-sep {
  height: 1px;
  background: var(--border);
  margin: 4px 8px;
}

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

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 8px var(--accent-glow);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow);
  filter: brightness(1.1);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary.btn-large { padding: 10px 22px; font-size: 14px; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-outline:hover {
  background: var(--bg-hover);
  border-color: var(--accent-light);
  color: var(--accent-text);
}
.btn-outline.btn-large { padding: 10px 22px; font-size: 14px; }

.btn-icon-sm {
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  font-size: 12px;
  transition: all 0.15s;
}
.btn-icon-sm:hover { background: var(--bg-hover); color: var(--text-primary); }

/* ----------------------------------------------------------------
   Main Toolbar — 2-row layout, NO overflow/clipping
   ---------------------------------------------------------------- */
#main-toolbar {
  background: var(--bg-bar);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 100;
  box-shadow: 0 1px 0 var(--border);
}

/* Row 1: tool buttons */
#toolbar-row1 {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px 8px 2px;
  flex-wrap: wrap;           /* wrap if screen is narrow */
  min-height: 48px;
}

/* Row 2: properties (color, size, font, opacity) */
#toolbar-row2 {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 2px 8px 4px;
  border-top: 1px solid var(--border-subtle);
  min-height: 32px;
  flex-wrap: wrap;
  background: rgba(0,0,0,0.15);
}

/* Group of related tool buttons */
.toolbar-group {
  display: flex;
  align-items: center;
  gap: 1px;
}

/* Vertical divider between groups */
.toolbar-div {
  width: 1px;
  height: 28px;
  background: var(--border);
  margin: 0 5px;
  flex-shrink: 0;
}

/* Property row divider */
.prop-div {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 2px;
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
}

/* ── Tool buttons ────────────────────────────────────────────── */
.tool-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  min-width: 44px;
  height: 40px;
  padding: 4px 6px;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all 0.15s;
  flex-shrink: 0;
  cursor: pointer;
}
.tool-btn svg { width: 15px; height: 15px; flex-shrink: 0; }
.tool-btn span {
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
  line-height: 1;
}
.tool-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border);
}
.tool-btn.active {
  background: var(--accent-glow);
  color: var(--accent-text);
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ★ Eraser — always visible, red tint when inactive, red border when active */
.eraser-btn {
  color: #f87171 !important;
  border-color: rgba(248,113,113,0.3) !important;
  min-width: 52px;
}
.eraser-btn:hover {
  background: rgba(248,113,113,0.1) !important;
  border-color: #f87171 !important;
  color: #fca5a5 !important;
}
.eraser-btn.active {
  background: rgba(248,113,113,0.2) !important;
  border-color: #f87171 !important;
  color: #fca5a5 !important;
  box-shadow: 0 0 10px rgba(248,113,113,0.4) !important;
}

/* ── Properties row ──────────────────────────────────────────── */
.prop-label {
  font-size: 10px;
  color: var(--text-muted);
  white-space: nowrap;
}
.prop-val {
  font-size: 10px;
  color: var(--text-secondary);
  min-width: 28px;
}
.prop-number {
  width: 44px;
  padding: 2px 4px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-primary);
  font-size: 11px;
}
.prop-icon-btn {
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
}
.prop-icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--accent);
}
.color-circle {
  width: 22px;
  height: 22px;
  padding: 1px;
  border-radius: 50%;
  border: 2px solid var(--border);
  cursor: pointer;
}
#prop-color {
  width: 28px;
  height: 28px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: none;
  cursor: pointer;
  padding: 1px;
}
#prop-size, #prop-opacity {
  width: 80px;
  accent-color: var(--accent);
}

/* Legacy selectors kept for compatibility */
.toolbar-section { display: flex; align-items: center; gap: 2px; }
.toolbar-label { display: none; }
.toolbar-sep { width: 1px; height: 28px; background: var(--border); margin: 0 4px; flex-shrink: 0; }
.toolbar-flex { flex: 1; }
#tool-props-bar { display: flex; align-items: center; gap: 8px; }


/* ----------------------------------------------------------------
   Main Layout
   ---------------------------------------------------------------- */
#main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

/* ----------------------------------------------------------------
   Left Sidebar (Page thumbnails)
   ---------------------------------------------------------------- */
#panel-sidebar {
  width: var(--sidebar-w);
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  transition: width 0.25s ease, opacity 0.25s ease;
}
#panel-sidebar.collapsed {
  width: 0;
  opacity: 0;
  pointer-events: none;
}

.panel-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.panel-tab {
  flex: 1;
  padding: 8px 4px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
  text-align: center;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}
.panel-tab:hover { color: var(--text-primary); background: var(--bg-hover); }
.panel-tab.active {
  color: var(--accent-text);
  border-bottom-color: var(--accent);
}

.panel-content {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.panel-content.active { display: block; }
.panel-content::-webkit-scrollbar { width: 4px; }
.panel-content::-webkit-scrollbar-track { background: transparent; }
.panel-content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.empty-msg {
  color: var(--text-muted);
  font-size: 12px;
  text-align: center;
  padding: 20px 8px;
}

/* Thumbnails */
#thumbnail-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.thumb-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s;
}
.thumb-item:hover { background: var(--bg-hover); }
.thumb-item.active {
  border-color: var(--accent);
  background: var(--accent-glow);
}
.thumb-canvas-wrap {
  width: 100%;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background: #fff;
}
.thumb-canvas-wrap canvas {
  width: 100%;
  height: auto;
  display: block;
}
.thumb-label {
  font-size: 10px;
  color: var(--text-muted);
}
.thumb-actions {
  display: none;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: center;
}
.thumb-item:hover .thumb-actions { display: flex; }
.thumb-action-btn {
  font-size: 10px;
  padding: 2px 6px;
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.1s;
}
.thumb-action-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.thumb-action-btn.danger:hover { border-color: #dc2626; color: #dc2626; }

/* ----------------------------------------------------------------
   PDF Container (Main Canvas Area)
   ---------------------------------------------------------------- */
#pdf-container {
  flex: 1;
  overflow: auto;
  background: var(--pdf-surface);
  background-image:
    radial-gradient(circle at 50% 50%, var(--pdf-glow) 0%, transparent 70%),
    linear-gradient(0deg, transparent 24px, var(--pdf-grid) 25px),
    linear-gradient(90deg, transparent 24px, var(--pdf-grid) 25px);
  background-size: auto, 25px 25px, 25px 25px;
  position: relative;
  display: flex;
  flex-direction: column;
  /* [issue-1] `safe center` centers pages when they fit, but falls back to
     start-alignment when a page is wider/taller than the viewport (at zoom)
     so the overflowing LEFT/TOP edge stays reachable by scrolling. Plain
     `center` clips the start edge and makes scrollLeft:0 unreachable. The
     plain `center` below is the fallback for browsers that don't grok `safe`
     (they keep today's behavior instead of reverting to `stretch`). */
  align-items: center;
  align-items: safe center;
  padding: 24px;
  gap: 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
#pdf-container::-webkit-scrollbar { width: 8px; height: 8px; }
#pdf-container::-webkit-scrollbar-track { background: transparent; }
#pdf-container::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* Drop Zone */
#drop-zone {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 100%;
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 10;
  pointer-events: all;
}
#drop-zone.hidden { display: none; }
#drop-zone.drag-over { background: rgba(245,158,11,0.07); }

.drop-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
  padding: 48px;
  background: var(--bg-panel);
  border: 2px dashed var(--border);
  border-radius: var(--radius-xl);
  max-width: 420px;
  transition: all 0.2s;
  animation: fadeInUp 0.4s ease;
}
.drop-content:hover {
  border-color: var(--accent);
  box-shadow: 0 0 40px var(--accent-glow);
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.drop-icon { font-size: 64px; line-height: 1; }
.drop-content h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}
.drop-content p {
  color: var(--text-secondary);
  font-size: 14px;
}
.drop-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.drop-hint {
  font-size: 11px;
  color: var(--text-muted);
}

/* PDF Pages */
#pdf-pages {
  display: flex;
  flex-direction: column;
  align-items: center;            /* fallback for browsers without `safe` */
  align-items: safe center;       /* [issue-1] keep left edge reachable at zoom */
  gap: 24px;
  width: 100%;
}

/* Individual page wrapper */
.pdf-page-wrapper {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.pdf-page-label {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-panel);
  padding: 2px 10px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.pdf-page {
  position: relative;
  box-shadow: var(--shadow-xl);
  border-radius: 2px;
  overflow: hidden;
  cursor: default;
  transition: box-shadow 0.2s;
  display: inline-block;
  flex-shrink: 0;
}
.pdf-page:hover { box-shadow: 0 16px 64px rgba(0,0,0,0.8); }

.pdf-canvas {
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}

/* Fabric.js generates a .canvas-container div with two canvases inside */
.canvas-container {
  position: absolute !important;
  top: 0 !important;
  left: 0 !important;
  z-index: 2 !important;
}
.canvas-container canvas {
  position: absolute !important;
  top: 0 !important;
  left: 0 !important;
}

/* ----------------------------------------------------------------
   Properties (now a LEFT tab: #panel-properties > #props-content)
   ---------------------------------------------------------------- */
#props-content {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.props-section {
  padding: 8px;
  border-radius: var(--radius-md);
  margin-bottom: 8px;
}
.props-section h4 {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.props-hint {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 12px 0;
}

.props-section label {
  display: block;
  font-size: 11px;
  color: var(--text-secondary);
  margin-bottom: 4px;
  margin-top: 10px;
}
.props-section label:first-of-type { margin-top: 0; }

.props-section input[type="color"] {
  width: 100%;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  cursor: pointer;
  padding: 2px;
}
.props-section input[type="number"],
.props-section select {
  width: 100%;
  padding: 6px 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 12px;
}
.props-section input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}
.props-section select option { background: var(--bg-card); }

.props-buttons {
  display: flex;
  gap: 6px;
  margin-top: 10px;
}
.fmt-btn {
  flex: 1;
  padding: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 13px;
  transition: all 0.15s;
}
.fmt-btn:hover { background: var(--bg-hover); border-color: var(--accent-light); }
.fmt-btn.active { background: var(--accent-glow); border-color: var(--accent); color: var(--accent-text); }

.action-btn {
  width: 100%;
  padding: 7px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 12px;
  text-align: left;
  transition: all 0.15s;
  margin-bottom: 4px;
}
.action-btn:hover { background: var(--bg-hover); }
.action-btn.danger { border-color: #4b1313; color: #f87171; }
.action-btn.danger:hover { background: rgba(220,38,38,0.15); border-color: #dc2626; }

/* ----------------------------------------------------------------
   Status Bar
   ---------------------------------------------------------------- */
#status-bar {
  height: var(--statusbar-h);
  background: var(--bg-bar);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  flex-shrink: 0;
  font-size: 11px;
  color: var(--text-muted);
}
.status-left, .status-center, .status-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.status-center { gap: 4px; }
#page-info { color: var(--text-secondary); font-weight: 500; }
.doc-name { color: var(--text-muted); max-width: 200px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.zoom-btn {
  width: 22px; height: 22px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.15s;
}
.zoom-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
#zoom-level { font-weight: 600; color: var(--text-secondary); min-width: 36px; text-align: center; }
#zoom-preset {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 11px;
  padding: 2px 4px;
}
#status-text { color: var(--text-muted); }

/* ----------------------------------------------------------------
   Modal
   ---------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.15s ease;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal-box {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 600px;
  max-width: 95vw;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: modalIn 0.2s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-header h2 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}
.modal-close {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  transition: all 0.15s;
}
.modal-close:hover { background: var(--bg-hover); color: #f87171; border-color: #dc2626; }

.modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.modal-tab {
  flex: 1;
  padding: 10px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}
.modal-tab:hover { color: var(--text-primary); background: var(--bg-hover); }
.modal-tab.active { color: var(--accent-text); border-bottom-color: var(--accent); }

.sig-panel {
  display: none;
  padding: 16px 20px;
  flex: 1;
  overflow-y: auto;
}
.sig-panel.active { display: block; }
.sig-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

/* Signature canvas */
.sig-canvas-wrap {
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #fff;
  cursor: crosshair;
}
#signature-pad {
  display: block;
  width: 100%;
  height: 200px;
  background: #fff;
}

.sig-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.sig-controls label { font-size: 11px; color: var(--text-muted); }
.sig-controls input[type="color"] {
  width: 32px; height: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 1px;
  background: var(--bg-card);
}
.sig-controls input[type="range"] { width: 80px; accent-color: var(--accent); }

/* Type signature */
.sig-text-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 24px;
  font-family: 'Caveat', cursive;
  margin-bottom: 12px;
  transition: border-color 0.15s;
}
.sig-text-input:focus { border-color: var(--accent); }

.sig-font-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.sig-font-option {
  padding: 12px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
  color: #1a1a2e;
}
.sig-font-option:hover { border-color: var(--accent-light); }
.sig-font-option.selected { border-color: var(--accent); background: var(--accent-glow); }

/* Upload signature */
.upload-area {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--bg-card);
}
.upload-area:hover { border-color: var(--accent); background: var(--accent-glow); }
.upload-icon { font-size: 40px; margin-bottom: 8px; }
.upload-hint { font-size: 11px; color: var(--text-muted); margin-top: 6px; }

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px 16px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* ----------------------------------------------------------------
   Stamp Panel Popup
   ---------------------------------------------------------------- */
.popup-panel {
  position: fixed;
  top: 100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  z-index: 800;
  padding: 16px;
  min-width: 300px;
  animation: modalIn 0.2s ease;
}
.popup-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.popup-header h3 { font-size: 14px; font-weight: 600; }

.stamp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.stamp-btn {
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 2px solid;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}
.stamp-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.stamp-btn.approved { border-color: #16a34a; color: #16a34a; background: rgba(22,163,74,0.1); }
.stamp-btn.approved:hover { background: rgba(22,163,74,0.2); }
.stamp-btn.draft { border-color: #6b7280; color: #9ca3af; background: rgba(107,114,128,0.1); }
.stamp-btn.confidential { border-color: #dc2626; color: #dc2626; background: rgba(220,38,38,0.1); }
.stamp-btn.rejected { border-color: #b91c1c; color: #f87171; background: rgba(185,28,28,0.1); }
.stamp-btn.revised { border-color: #0891b2; color: #22d3ee; background: rgba(8,145,178,0.1); }
.stamp-btn.review { border-color: #d97706; color: #fbbf24; background: rgba(217,119,6,0.1); }
.stamp-btn.void { border-color: #7c3aed; color: #a78bfa; background: rgba(124,58,237,0.1); }
.stamp-btn.copy { border-color: #64748b; color: #94a3b8; background: rgba(100,116,139,0.1); }

/* ----------------------------------------------------------------
   Search Panel
   ---------------------------------------------------------------- */
#search-panel {
  position: fixed;
  top: calc(var(--menubar-h) + var(--toolbar-h) + 8px);
  right: calc(var(--props-w) + 16px);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 600;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 320px;
  animation: modalIn 0.15s ease;
}
#search-input {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  color: var(--text-primary);
  font-size: 13px;
}
#search-input:focus { border-color: var(--accent); }
.search-count { font-size: 11px; color: var(--text-muted); white-space: nowrap; min-width: 50px; }
.search-nav-btn {
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 12px;
  transition: all 0.15s;
}
.search-nav-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.search-close-btn {
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  border-radius: var(--radius-sm);
  transition: all 0.15s;
}
.search-close-btn:hover { color: #f87171; }

/* Search highlights */
.search-highlight {
  position: absolute;
  background: rgba(255,215,0,0.4);
  border: 1px solid rgba(255,215,0,0.8);
  pointer-events: none;
  border-radius: 2px;
  z-index: 10;
}
.search-highlight.active {
  background: rgba(255,165,0,0.6);
  border-color: orange;
}

/* ----------------------------------------------------------------
   Context Menu
   ---------------------------------------------------------------- */
.context-menu {
  position: fixed;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 900;
  padding: 4px;
  min-width: 180px;
  animation: dropdownIn 0.1s ease;
}
.context-menu button {
  display: block;
  width: 100%;
  text-align: left;
  padding: 7px 12px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.1s;
}
.context-menu button:hover { background: var(--bg-hover); }

/* ----------------------------------------------------------------
   Toast
   ---------------------------------------------------------------- */
.toast {
  position: fixed;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 10px 20px;
  font-size: 13px;
  color: var(--text-primary);
  z-index: 2000;
  animation: toastIn 0.25s ease;
  max-width: 400px;
  text-align: center;
}
.toast.success { border-color: #16a34a; color: #4ade80; }
.toast.error { border-color: #dc2626; color: #f87171; }
@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ----------------------------------------------------------------
   Loading Spinner
   ---------------------------------------------------------------- */
.loading-page {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-panel);
  border-radius: 2px;
}
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ----------------------------------------------------------------
   Scrollbar for PDF container
   ---------------------------------------------------------------- */
#pdf-container::-webkit-scrollbar { width: 10px; height: 10px; }
#pdf-container::-webkit-scrollbar-track { background: #1a1a24; }
#pdf-container::-webkit-scrollbar-thumb {
  background: #30363d;
  border-radius: 5px;
  border: 2px solid #1a1a24;
}
#pdf-container::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ----------------------------------------------------------------
   Annotations: selected object highlight
   ---------------------------------------------------------------- */
.canvas-container { position: absolute !important; top: 0 !important; left: 0 !important; }

/* ----------------------------------------------------------------
   Responsive tweaks
   ---------------------------------------------------------------- */
@media (max-width: 900px) {
  #panel-sidebar { width: 180px; }
  #ami-dock { width: 280px; }
}
@media (max-width: 600px) {
  #panel-sidebar { display: none; }
  .logo-text { display: none; }
}

/* ----------------------------------------------------------------
   Loading Overlay
   ---------------------------------------------------------------- */
#loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(13,17,23,0.85);
  backdrop-filter: blur(4px);
  z-index: 3000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
#loading-overlay.hidden { display: none; }
#loading-msg {
  color: var(--text-secondary);
  font-size: 14px;
}
.spinner-lg {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ----------------------------------------------------------------
   Page rotation
   ---------------------------------------------------------------- */
.pdf-page.rotated-90  { transform: rotate(90deg); }
.pdf-page.rotated-180 { transform: rotate(180deg); }
.pdf-page.rotated-270 { transform: rotate(270deg); }

/* ----------------------------------------------------------------
   Highlight tool cursor
   ---------------------------------------------------------------- */
.tool-highlight-cursor { cursor: text; }
.tool-pen-cursor { cursor: crosshair; }
.tool-text-cursor { cursor: text; }

/* ----------------------------------------------------------------
   Keyboard shortcut badge
   ---------------------------------------------------------------- */
kbd {
  display: inline-block;
  padding: 2px 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

/* ----------------------------------------------------------------
   Eraser cursor — circle cursor is set per-canvas by Fabric's
   freeDrawingCursor in annotation.js (_buildEraserCursor). Fabric
   puts that cursor inline on the upper-canvas element, so we only
   tint the eraser toolbar button via .eraser-active here.
   ---------------------------------------------------------------- */
body.eraser-active #tool-eraser {
  background: rgba(248,113,113,0.2);
  box-shadow: 0 0 12px rgba(248,113,113,0.45);
}

/* ----------------------------------------------------------------
   Drop actions 3-button layout
   ---------------------------------------------------------------- */
.drop-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ----------------------------------------------------------------
   Active tool glow pulse
   ---------------------------------------------------------------- */
.tool-btn.active {
  animation: toolGlow 2s ease-in-out infinite alternate;
}
@keyframes toolGlow {
  from { box-shadow: 0 0 4px var(--accent-glow); }
  to   { box-shadow: 0 0 12px var(--accent-glow); }
}

/* ----------------------------------------------------------------
   Highlight color picker for toolbar
   ---------------------------------------------------------------- */
#highlight-color-btn {
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: rgba(255,235,59,0.6);
  cursor: pointer;
  transition: transform 0.15s;
}
#highlight-color-btn:hover { transform: scale(1.15); }

/* ----------------------------------------------------------------
   Ami assistant (4.4) - top-bar trigger + dedicated RIGHT dock + mobile overlay
   (Properties now lives in the LEFT tab group; Ami is no longer a left tab)
   ---------------------------------------------------------------- */
.btn-ami {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent); color: #1a1a2e;
  border: 1px solid var(--accent); border-radius: 8px;
  padding: 7px 13px; font: 700 13px var(--font); cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.btn-ami:hover { background: var(--accent-light); border-color: var(--accent-light); }
.btn-ami.active { background: var(--accent-light); border-color: var(--accent-light); }
.btn-ami svg { width: 15px; height: 15px; }

/* Properties moved to the LEFT tab group: let #props-content's own padding govern. */
#panel-properties.panel-content { padding: 0; }
/* Ami moved to a DEDICATED full-height RIGHT dock (closed by default -> canvas reclaims width). */
#ami-dock { width: 340px; flex-shrink: 0; background: var(--bg-panel); border-left: 1px solid var(--border); flex-direction: column; overflow: hidden; display: none; transition: width 0.2s ease; }
#ami-dock.open { display: flex; }
.ami-head { display: flex; align-items: center; justify-content: space-between; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.ami-title { font: 700 13px var(--font); color: var(--text-primary); }
.ami-close { display: inline-flex; background: none; border: none; color: var(--text-secondary); font-size: 16px; line-height: 1; cursor: pointer; padding: 2px 6px; }
.ami-tools { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.ami-tools-label { font-size: 11px; color: var(--text-secondary); }
.ami-chip { background: var(--bg-hover); border: 1px solid var(--border); color: var(--text-primary); border-radius: 14px; padding: 4px 11px; font: 600 12px var(--font); cursor: pointer; }
.ami-chip:hover { border-color: var(--accent); color: var(--accent-text); }
.ami-chip-ghost { margin-left: auto; color: var(--text-secondary); }
.ami-thread { flex: 1 1 auto; min-height: 120px; overflow-y: auto; padding: 10px; display: flex; flex-direction: column; gap: 8px; font-size: 13px; }
.ami-empty { color: var(--text-secondary); font-size: 12px; line-height: 1.5; }
.ami-msg { display: flex; flex-direction: column; gap: 2px; max-width: 100%; }
.ami-msg-you { align-items: flex-end; }
.ami-who { font: 700 10px var(--font); color: var(--text-secondary); }
.ami-bubble { display: inline-block; max-width: 92%; padding: 7px 10px; border-radius: 9px; border: 1px solid var(--border); line-height: 1.45; word-wrap: break-word; overflow-wrap: anywhere; }
.ami-msg-you .ami-bubble { background: var(--accent-glow); border-color: var(--accent); }
.ami-msg-ai .ami-bubble { background: var(--bg-card); }
.ami-thinking { color: var(--text-secondary); font-size: 12px; font-style: italic; }
.ami-input-row { display: flex; gap: 6px; padding: 8px 10px; border-top: 1px solid var(--border); }
.ami-input { flex: 1; min-width: 0; padding: 8px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; background: var(--bg-bar); color: var(--text-primary); }
.ami-send { padding: 8px 14px; background: var(--accent); color: #1a1a2e; border: 1px solid var(--accent); border-radius: 8px; font: 700 13px var(--font); cursor: pointer; }
.ami-send:hover { background: var(--accent-light); }
.ami-help { padding: 6px 10px 10px; font-size: 11px; color: var(--text-secondary); line-height: 1.4; }

/* Mobile / narrow: the open Ami dock becomes a full-screen overlay. */
@media (max-width: 600px) {
  #ami-dock.open { position: fixed; inset: 0; z-index: 2600; width: 100%; }
}