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

:root {
  --bg: #f5f1eb;
  --bg-surface: #ffffff;
  --bg-elevated: #f0ece6;
  --border: #d9d1c7;
  --text: #2c2418;
  --text-muted: #8a7e72;
  --primary: #D97756;
  --primary-hover: #C4613F;
  --danger: #D9534F;
  --success: #7DB87D;
  --warning: #E5A84B;
  --radius: 8px;
  --toolbar-h: 52px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}

/* ── Toolbar ── */
#toolbar {
  height: var(--toolbar-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  gap: 8px;
}

.toolbar-left, .toolbar-right { display: flex; align-items: center; gap: 6px; }

.logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-right: 16px;
  white-space: nowrap;
}

.tool-group { display: flex; gap: 2px; }

.tool-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s;
}
.tool-btn:hover { background: var(--bg-elevated); color: var(--text); }
.tool-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.tool-btn span { font-size: 14px; }

.action-btn {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 12px;
  transition: all 0.15s;
  white-space: nowrap;
}
.action-btn:hover { background: var(--border); }
.action-btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.action-btn.primary:hover { background: var(--primary-hover); }
.action-btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.action-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.separator { width: 1px; height: 24px; background: var(--border); }

/* ── Workspace ── */
#workspace {
  display: flex;
  height: calc(100vh - var(--toolbar-h));
}

#canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

#konva-container { width: 100%; height: 100%; }

#zoom-info {
  position: absolute;
  bottom: 12px;
  left: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--text-muted);
}

/* ── Sidebar ── */
#sidebar {
  width: 280px;
  background: var(--bg-surface);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 10px 8px;
  font-size: 12px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

.tab-content { display: none; padding: 12px; overflow-y: auto; flex: 1; }
.tab-content.active { display: block; }

.tab-content h3 {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 12px 0 8px;
  letter-spacing: 0.5px;
}
.tab-content h3:first-child { margin-top: 0; }

/* ── Palette ── */
.palette-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.palette-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: grab;
  transition: all 0.15s;
  font-size: 11px;
  color: var(--text-muted);
}
.palette-item:hover { background: var(--bg-elevated); color: var(--text); border-color: var(--primary); }

.palette-icon {
  width: 36px;
  height: 36px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
}

/* ── Properties ── */
.prop-group {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.prop-group label {
  font-size: 12px;
  color: var(--text-muted);
  min-width: 60px;
}
.prop-group input, .prop-group select {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 4px;
  font-size: 12px;
}
.prop-group span {
  font-size: 12px;
  color: var(--text);
}

#no-selection { padding: 20px 0; text-align: center; }
#no-selection p { color: var(--text-muted); font-size: 13px; }

/* ── Metrics ── */
.metric-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 6px;
}
.metric-card.full-width { flex-direction: column; align-items: flex-start; gap: 4px; }
.metric-label { font-size: 12px; color: var(--text-muted); }
.metric-value { font-size: 14px; font-weight: 600; color: var(--text); }

#tab-metrics h4 {
  font-size: 11px;
  color: var(--text-muted);
  margin: 12px 0 6px;
  text-transform: uppercase;
}

/* ── Task List ── */
.task-empty {
  color: var(--text-muted);
  font-size: 12px;
  text-align: center;
  padding: 16px 0;
}

.task-row {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  margin-bottom: 4px;
  cursor: grab;
  transition: border-color 0.15s;
}
.task-row:hover { border-color: var(--primary); }
.task-row.dragging { opacity: 0.4; }
.task-row.drag-over { border-color: var(--primary); border-style: dashed; }

.task-num {
  min-width: 18px;
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
}

.task-name {
  width: 70px;
  flex-shrink: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 3px 5px;
  border-radius: 3px;
  font-size: 11px;
}

.task-object {
  flex: 1;
  min-width: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 3px 2px;
  border-radius: 3px;
  font-size: 11px;
}

.task-dur-wrap {
  display: flex;
  align-items: center;
  gap: 1px;
  flex-shrink: 0;
}

.task-dur {
  width: 36px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 3px 3px;
  border-radius: 3px;
  font-size: 11px;
  text-align: right;
}

.task-dur-label {
  font-size: 10px;
  color: var(--text-muted);
}

.task-del {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  padding: 0 2px;
  flex-shrink: 0;
}
.task-del:hover { color: var(--danger); }

/* ── Segment Rows ── */
.segment-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-muted);
  padding: 4px 0;
  border-bottom: 1px solid var(--border);
}
.seg-num {
  min-width: 16px;
  text-align: center;
  font-weight: 600;
  color: var(--primary);
}
.seg-names { flex: 1; }
.seg-dist { white-space: nowrap; font-weight: 500; color: var(--text); }

/* ── Modals ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 480px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
}
.modal.modal-lg { width: 640px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h2 { font-size: 16px; }

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
}

.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
}

/* Upload dropzone */
#upload-dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s;
}
#upload-dropzone:hover,
#upload-dropzone.dragover { border-color: var(--primary); }
#upload-dropzone p { color: var(--text-muted); margin-bottom: 4px; }
#upload-dropzone .hint { font-size: 12px; }

#preview-img {
  max-width: 100%;
  max-height: 200px;
  border-radius: var(--radius);
  margin-bottom: 8px;
}
#upload-info { font-size: 12px; color: var(--text-muted); }

.progress-bar {
  height: 4px;
  background: var(--bg);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 8px;
}
.progress-fill {
  height: 100%;
  background: var(--primary);
  width: 0%;
  transition: width 0.3s;
  animation: progress-indeterminate 1.5s infinite;
}
@keyframes progress-indeterminate {
  0% { width: 0%; margin-left: 0; }
  50% { width: 60%; margin-left: 20%; }
  100% { width: 0%; margin-left: 100%; }
}

#upload-status { font-size: 13px; color: var(--text-muted); text-align: center; }

/* Spinner */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Markdown-ish */
.markdown-body { font-size: 14px; line-height: 1.6; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { margin-top: 16px; margin-bottom: 8px; }
.markdown-body h1 { font-size: 18px; }
.markdown-body h2 { font-size: 16px; }
.markdown-body h3 { font-size: 14px; }
.markdown-body ul, .markdown-body ol { padding-left: 20px; margin: 8px 0; }
.markdown-body li { margin-bottom: 4px; }
.markdown-body strong { color: var(--primary); }
.markdown-body p { margin: 8px 0; }

/* Saved list */
.saved-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 6px;
  cursor: pointer;
}
.saved-item:hover { border-color: var(--primary); }
.saved-item .name { font-size: 13px; }
.saved-item .date { font-size: 11px; color: var(--text-muted); }
.saved-item .btn-del {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 14px;
}