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

:root {
  /* Base Colors (Shared) */
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-light: rgba(59, 130, 246, 0.2);
  --danger: #ef4444;
  --danger-hover: #f87171;
  --success: #10b981;
  --warning: #f59e0b;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.3), 0 2px 4px -1px rgba(0,0,0,0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.3), 0 4px 6px -2px rgba(0,0,0,0.2);
}

/* Light Theme Palette */
html[data-theme="light"] {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --border: #e2e8f0;
  --border-dark: #cbd5e1;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.05), 0 4px 6px -2px rgba(0,0,0,0.03);
}

/* Dark Theme Palette (Default) */
html[data-theme="dark"] {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-alt: #334155;
  --border: #475569;
  --border-dark: #64748b;
  --text-main: #f8fafc;
  --text-muted: #cbd5e1;
  --text-light: #94a3b8;
}

body {
  font-family: 'Inter', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s, color 0.3s;
}

/* ===== Utility ===== */
.hidden { display: none !important; }

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-dark); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

/* ===== Layout ===== */
#app {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 24px clamp(12px, 2vw, 32px);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}
header h1 .material-symbols-rounded { color: var(--primary); font-size: 28px; }

/* ===== Stepper ===== */
.stepper {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  padding: 12px 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.step-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}
.step-item.active { color: var(--primary); }
.step-item.completed { color: var(--text-main); }
.step-item.step-navigable { cursor: pointer; border-radius: var(--radius-sm); padding: 4px 6px; margin: -4px -6px; }
.step-item.step-navigable:hover { background: var(--surface-alt); color: var(--primary); }
.step-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-alt);
  font-size: 0.8rem;
}
.step-item.active .step-num { background: var(--primary); color: #ffffff; }
.step-item.completed .step-num { background: var(--text-main); color: var(--surface); }
.step-divider { flex: 1; height: 2px; background: var(--border); min-width: 40px; }
.step-item.completed + .step-divider { background: var(--text-main); }

/* ===== Step Container ===== */
.step-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: opacity 0.3s ease;
}
.step-inner { padding: 32px; overflow-y: auto; height: 100%; display: flex; flex-direction: column; }

.step-title {
  font-size: 1.25rem; font-weight: 700; margin-bottom: 20px;
  color: var(--text-main);
  display: flex; align-items: center; gap: 8px;
  flex-shrink: 0;
}

/* ===== Buttons & Inputs ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border: none; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 600; cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #ffffff; box-shadow: 0 2px 4px rgba(59,130,246,0.2); }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); transform: translateY(-1px); }
.btn-secondary { background: var(--surface-alt); color: var(--text-main); border: 1px solid var(--border-dark); }
.btn-secondary:hover:not(:disabled) { background: var(--border); }

/* Soft Danger Button */
.btn-soft-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.btn-soft-danger:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.25);
}

.btn-danger-outline { background: transparent; color: var(--danger); border: 1px solid rgba(239,68,68,0.5); }
.btn-danger-outline:hover:not(:disabled) { background: rgba(239,68,68,0.2); border-color: var(--danger); }
/* 罫線モードONが分かりやすいようにする */
#btnDrawLine.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
  box-shadow: 0 2px 4px rgba(59,130,246,0.25);
}

.btn-sm { padding: 6px 14px; font-size: 0.85rem; }
.btn-icon { padding: 8px; min-width: 36px; border-radius: var(--radius); }
.material-symbols-rounded { font-variation-settings: 'FILL' 1, 'wght' 500, 'GRAD' 0, 'opsz' 24; font-size: 20px; }

/* Button Groups (Segmented Control) */
.btn-group {
  display: inline-flex;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px;
}
.btn-group .btn {
  background: transparent; color: var(--text-muted); border: none; box-shadow: none;
  border-radius: var(--radius-sm); padding: 8px 16px;
}
.btn-group .btn:hover:not(:disabled) { color: var(--text-main); background: rgba(255,255,255,0.05); transform: none; }
.btn-group .btn.active { background: var(--surface); color: var(--primary); box-shadow: var(--shadow-sm); font-weight: 700; border: 1px solid var(--border); }

.btn-group.toggle-group { height: 36px; align-items: stretch; }
.btn-group.toggle-group .btn { padding: 0 12px; font-size: 0.8rem; height: 100%; }

/* ===== Upload Area ===== */
.upload-area {
  border: 2px dashed var(--border-dark); border-radius: var(--radius-lg);
  padding: 64px 24px; text-align: center;
  transition: all 0.2s; background: var(--surface-alt);
  flex-shrink: 0;
}
.upload-area.dragover { border-color: var(--primary); background: var(--primary-light); }
.upload-icon .material-symbols-rounded { font-size: 64px; color: var(--text-light); margin-bottom: 16px; }
.upload-area.dragover .upload-icon .material-symbols-rounded { color: var(--primary); }
.upload-area p { color: var(--text-muted); margin-bottom: 24px; font-size: 1.1rem; }

/* ===== Step 2: Thumbnails ===== */
.page-filter-controls { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; flex-shrink: 0; }
.hint { font-size: 0.85rem; color: var(--text-muted); display: flex; align-items: center; gap: 4px; margin-bottom: 16px; flex-shrink: 0;}

.page-thumbnails {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  grid-auto-rows: max-content;
  gap: 16px;
  padding: 4px; flex: 1; overflow-y: auto;
  align-content: flex-start;
  min-height: 0;
}
.page-thumb {
  background: var(--surface); border: 2px solid var(--border); border-radius: var(--radius);
  overflow: hidden; cursor: zoom-in; transition: all 0.2s; position: relative;
  display: flex; flex-direction: column;
  aspect-ratio: 1;
}
.page-thumb:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--border-dark); }
.page-thumb.selected { border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-light); }
.page-thumb.selected::after {
  content: none !important;
  display: none !important;
}
.page-thumb-select {
  position: absolute !important; top: 8px; right: 8px; width: 34px; height: 34px;
  padding: 0; margin: 0; border-radius: 999px; border: 2px solid rgba(255,255,255,0.95);
  background: rgba(15,23,42,0.65); color: #ffffff; display: flex !important;
  align-items: center; justify-content: center; z-index: 20; cursor: pointer;
  box-shadow: var(--shadow-sm); transition: all 0.2s; line-height: 1;
  appearance: none; -webkit-appearance: none; flex: none;
}
.page-thumb-select:hover { transform: scale(1.08); background: var(--primary); }
.page-thumb-select .material-symbols-rounded { font-size: 22px; line-height: 1; }
.page-thumb.selected .page-thumb-select { background: var(--primary); border-color: #ffffff; }

.page-thumb-image-container {
  width: 100%;
  flex: 1;
  background-color: #ffffff;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  overflow: hidden;
  min-height: 0;
}
.page-thumb canvas {
  max-width: 100%;
  max-height: 100%;
  width: auto !important;
  height: auto !important;
  display: block;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

.page-thumb-info {
  padding: 8px 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.page-thumb-label { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); white-space: nowrap; }
.page-thumb-name {
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-main);
  text-align: left;
  flex: 1;
}

/* ===== Step 2 integrated layout ===== */
.step2-action-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 16px;
  flex-shrink: 0;
}
.step2-layout {
  display: flex;
  gap: 16px;
  flex: 1;
  min-height: 0;
  align-items: stretch;
}
.step2-main {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
  min-height: 0;
}
.step2-floor-panel {
  width: 320px;
  margin: 0;
  flex-shrink: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-self: stretch;
}
.floor-add-row {
  display: flex;
  align-items: stretch;
  gap: 8px;
  margin-bottom: 12px;
  flex-shrink: 0;
  min-width: 0;
}
.floor-add-row .floor-name-input {
  min-width: 0;
}
.floor-add-btn {
  flex-shrink: 0;
  white-space: nowrap;
  padding-left: 10px;
  padding-right: 10px;
}

/* ===== Step 3: Work Area ===== */
.work-area {
  display: flex; flex-direction: column; height: 100%; gap: 16px;
}
.work-layout {
  display: flex; flex: 1; gap: 16px; min-height: 0;
}

/* Toolbar Redesign */
.toolbar-container {
  background: var(--surface-alt); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 12px 20px;
}

.setting-item { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; }
.setting-item label { font-size: 0.75rem; font-weight: 600; color: var(--text-muted); padding-left: 2px; line-height: 1; transition: opacity 0.2s; }

/* list-name-displayをlist-name-inputに変更 */
.list-name-input {
  font-size: 1.1rem; font-weight: 700; color: var(--primary);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; flex: 1;
  background: transparent; border: none; border-bottom: 1px dashed var(--border-dark);
  outline: none; transition: border-color 0.2s; padding-bottom: 2px;
}
.list-name-input:focus { border-bottom-color: var(--primary); }

.badge-info {
  background: var(--surface); border: 1px solid var(--border); padding: 6px 12px;
  border-radius: 20px; font-size: 0.85rem; font-weight: 600; color: var(--text-main);
  display: flex; align-items: center; gap: 6px; box-shadow: var(--shadow-sm);
}

/* Canvas Container */
.main-canvas-wrapper {
  flex: 1; position: relative; border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg); overflow: auto;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
  z-index: 1;
}
#pdfCanvas { display: block; margin: 0 auto; background-color: #ffffff; }
.selection-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; cursor: crosshair; }
.edit-item-layer {
  box-sizing: border-box !important;
  background-origin: border-box !important;
  background-clip: border-box !important;
  z-index: 5 !important;
}

/* Side Panel */
.side-panel {
  width: 300px; display: flex; flex-direction: column; gap: 16px;
  background: var(--surface-alt); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.side-panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding-bottom: 12px; border-bottom: 1px solid var(--border-dark); flex-shrink: 0;
}
.side-panel-header h3 { font-size: 1rem; font-weight: 700; display: flex; align-items: center; gap: 6px; color: var(--text-main); }
.side-panel-header h3 span { color: var(--primary); }

.extracted-list {
  flex: 1; overflow-y: auto; display: flex; flex-direction: column;
  gap: 12px; align-content: flex-start;
  padding-right: 4px; min-height: 0;
}

/* グループヘッダーとコンテンツ用のスタイル */
.group-header {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--surface); padding: 8px 12px;
  border-radius: var(--radius-sm); border: 1px solid var(--border);
  cursor: pointer; font-size: 0.85rem; font-weight: 700; color: var(--text-main);
  box-shadow: var(--shadow-sm); transition: background-color 0.2s, border-color 0.2s;
}
.group-header:hover { background: var(--surface-alt); border-color: var(--border-dark); }
.group-content { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 8px; }
.group-content.collapsed { display: none; }
.group-toggle-icon { font-size: 20px; color: var(--text-muted); transition: transform 0.3s; }
.group-toggle-icon.collapsed { transform: rotate(-90deg); }

.extracted-item {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: transform 0.2s, box-shadow 0.2s;
  position: relative; display: flex; flex-direction: column;
}
.extracted-item:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--border-dark); }
.extracted-item img {
  width: 100%; height: 100px; flex-shrink: 0;
  object-fit: contain; background: #ffffff; display: block; cursor: pointer;
}

/* ファイル名入力用スタイル */
.extracted-item-name-input {
  flex: 1; border: none; background: transparent; color: var(--text-main);
  font-size: 0.7rem; font-weight: 600; text-align: left; padding: 6px 4px 6px 8px;
  outline: none; min-width: 0; transition: background-color 0.2s;
}
.extracted-item-name-input:focus {
  background: var(--surface); box-shadow: inset 0 0 0 1px var(--primary);
}
.extracted-item-ext {
  font-size: 0.65rem; color: var(--text-muted); padding-right: 8px; font-weight: 600; flex-shrink: 0;
}

.del-btn {
  position: absolute; top: 4px; right: 4px; width: 22px; height: 22px; border-radius: 50%;
  background: rgba(30, 41, 59, 0.9); border: 1px solid var(--border); color: #ef4444;
  display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}
.extracted-item:hover .del-btn { opacity: 1; }
.del-btn:hover { background: #ef4444; color: #ffffff; border-color: #ef4444; }
.del-btn .material-symbols-rounded { font-size: 14px; }

/* Selection Rects */
.selection-rect { position: absolute; border: 2px dashed; pointer-events: none; border-radius: 2px; z-index: 12; }
.selection-rect.header-sel { border-color: var(--warning); background: rgba(245,158,11,0.2); }
.selection-rect.fixed-header-sel { border-color: #8b5cf6; background: rgba(139,92,246,0.2); }
.selection-rect.header-row-sel { border-color: #06b6d4; background: rgba(6,182,212,0.2); }
.selection-rect.target-sel { border-color: var(--success); background: rgba(16,185,129,0.2); }
.selection-rect.edit-sel { border-color: #eab308; background: rgba(234, 179, 8, 0.2); }
.selection-rect.copy-sel { border-color: var(--primary); background: rgba(59, 130, 246, 0.2); }
.selection-rect.confirmed { border-style: solid; z-index: 10; }

.history-rect {
  opacity: 0.8 !important; border-color: var(--border-dark) !important;
  background: rgba(148, 163, 184, 0.15) !important; border-style: dashed !important; z-index: 1 !important;
}

/* Loading & Toast */
.loading-info {
  padding: 16px; background: rgba(59, 130, 246, 0.1); border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius); color: var(--primary-hover); font-weight: 600;
  display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 20px;
}
.loading-info .material-symbols-rounded { animation: spin 2s linear infinite; }
@keyframes spin { 100% { transform: rotate(360deg); } }

.toast {
  position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%) translateY(20px);
  padding: 12px 24px; background: var(--surface-alt); color: var(--text-main); font-weight: 500;
  border-radius: 30px; border: 1px solid var(--border); box-shadow: var(--shadow-lg); z-index: 1000;
  display: flex; align-items: center; gap: 8px;
  opacity: 0; pointer-events: none; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* Modal */
.preview-modal {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(15, 23, 42, 0.8); backdrop-filter: blur(4px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  z-index: 2000; cursor: default; animation: fadeIn 0.2s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.preview-close-btn { position: absolute; top: 24px; right: 24px; background: var(--surface); color: var(--text-main); border: 1px solid var(--border); border-radius: 50%; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; cursor: pointer; z-index: 10; box-shadow: var(--shadow); transition: all 0.2s; }
.preview-close-btn:hover { background: var(--danger); color: #fff; border-color: var(--danger); transform: scale(1.05); }
.preview-modal img { border-radius: var(--radius); box-shadow: var(--shadow-lg); background: #ffffff; cursor: default; }
.preview-modal-name { background: var(--surface); color: var(--text-main); padding: 8px 24px; border-radius: 30px; font-weight: 600; box-shadow: var(--shadow); border: 1px solid var(--border); display: flex; align-items: center; gap: 4px; cursor: text; margin: 0; }
.preview-name-input { background: transparent; border: none; color: inherit; font-family: inherit; font-size: inherit; font-weight: inherit; outline: none; text-align: left; min-width: 150px; border-bottom: 1px dashed var(--border-dark); transition: border-color 0.2s; }
.preview-name-input:focus { border-bottom-color: var(--primary); }
.preview-nav-btn { background: var(--surface); color: var(--text-main); border: 1px solid var(--border); box-shadow: var(--shadow); transition: all 0.2s; flex-shrink: 0; }
.preview-nav-btn:hover:not(:disabled) { background: var(--primary); color: #fff; border-color: var(--primary); transform: scale(1.05); }
.preview-nav-btn:disabled { opacity: 0.3; cursor: not-allowed; }

/* ===== Floor Setup ===== */
.floor-name-input {
  flex: 1; padding: 8px 12px; border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm); background: var(--surface);
  color: var(--text-main); font-size: 0.9rem; font-family: inherit;
  outline: none; transition: border-color 0.2s;
}
.floor-name-input:focus { border-color: var(--primary); }
.floor-list {
  display: flex; flex-direction: column; gap: 8px;
  flex: 1; overflow-y: auto; min-height: 0;
}
.floor-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 0.9rem; font-weight: 600; color: var(--text-main);
  transition: all 0.2s;
}
.floor-item:hover { border-color: var(--border-dark); box-shadow: var(--shadow-sm); }
.floor-item .floor-item-name { display: flex; align-items: center; gap: 8px; }
.floor-item .floor-item-name .material-symbols-rounded { color: var(--warning); font-size: 18px; }
.floor-item .floor-item-actions { display: flex; gap: 4px; }
.floor-item .floor-item-actions button {
  background: transparent; border: none; color: var(--text-muted);
  cursor: pointer; padding: 4px; border-radius: 4px; transition: all 0.2s; display: flex; align-items: center;
}
.floor-item .floor-item-actions button:hover { color: var(--danger); background: rgba(239,68,68,0.1); }
.floor-selector {
  flex: 1; padding: 6px 10px; border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm); background: var(--surface);
  color: var(--text-main); font-size: 0.85rem; font-weight: 600;
  font-family: inherit; outline: none; cursor: pointer;
}
.floor-selector:focus { border-color: var(--primary); }
.floor-subgroup-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 9px 12px; margin-top: 4px;
  border-radius: var(--radius-sm); cursor: pointer;
  font-size: 0.9rem; font-weight: 700; color: var(--text-main);
  background: rgba(245,158,11,0.12); border: 1px solid rgba(245,158,11,0.35);
  box-shadow: var(--shadow-sm);
  transition: background-color 0.2s, border-color 0.2s;
  grid-column: 1 / -1;
}
.floor-subgroup-header:hover { background: rgba(245,158,11,0.2); border-color: rgba(245,158,11,0.55); }
.floor-subgroup-header .group-toggle-icon { color: var(--warning); }
.group-content > .group-content { grid-column: 1 / -1; }
.extracted-item.dragging { opacity: 0.4; }
.floor-subgroup-header.drag-over,
.group-header.drag-over { background: var(--primary-light); border-color: var(--primary); }