:root {
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --success: #22c55e;
  --danger: #ef4444;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --muted: #94a3b8;
  --border: #e2e8f0;
}

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

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

.header {
  background: var(--primary);
  color: white;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.header h1 { font-size: 1.2rem; font-weight: 600; }
.header a { color: rgba(255,255,255,0.8); text-decoration: none; font-size: 0.9rem; }

.layout {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* Session list */
.session-list { margin-bottom: 2rem; }
.session-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: border-color 0.15s;
}
.session-item:hover { border-color: var(--primary); }
.session-item .session-title { font-weight: 600; }
.session-item .session-meta { color: var(--muted); font-size: 0.85rem; }
.session-item .session-id { font-family: monospace; color: var(--primary); }

/* Create session form */
.create-form {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
  margin-bottom: 2rem;
}
.create-form h2 { font-size: 1rem; margin-bottom: 1rem; }
.form-row {
  display: flex;
  gap: 0.8rem;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 0.8rem;
}
.form-group { flex: 1; min-width: 200px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.3rem;
}
.form-group input, .form-group select {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
}
.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}
.checkbox-row input[type="checkbox"] { width: 18px; height: 18px; }

/* Buttons */
.btn {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 500;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: white; }
.btn-sm { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-outline:hover { background: var(--bg); }

/* Question editor in session view */
.session-view { display: none; }
.session-view.active { display: block; }

.share-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.share-box .qr-code canvas { border-radius: 8px; }
.share-urls { flex: 1; min-width: 200px; }
.share-urls .url-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.share-urls label { font-size: 0.8rem; color: var(--muted); display: block; margin-bottom: 0.2rem; }
.share-urls input {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  font-family: monospace;
}
.share-urls .btn { white-space: nowrap; }

/* Question list */
.question-list { margin-top: 1rem; }
.question-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  margin-bottom: 0.8rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.question-item .q-info { flex: 1; }
.question-item .q-type {
  display: inline-block;
  font-size: 0.75rem;
  background: var(--bg);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  color: var(--muted);
  margin-right: 0.5rem;
}
.question-item .q-title { font-weight: 500; }
.question-item .q-actions { display: flex; gap: 0.4rem; }
.q-status-open { color: var(--success); font-size: 0.8rem; }
.q-status-closed { color: var(--danger); font-size: 0.8rem; }

.chart-type-select {
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8rem;
  background: white;
  cursor: pointer;
}

/* Add question form */
.add-question {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
  margin-top: 1rem;
}
.add-question h3 { font-size: 1rem; margin-bottom: 1rem; }
.option-list { margin: 0.5rem 0; }
.option-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.4rem;
}
.option-row input { flex: 1; padding: 0.5rem; border: 1px solid var(--border); border-radius: 6px; }
.option-row .btn-remove {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 1.2rem;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  cursor: pointer;
}
.back-btn:hover { color: var(--text); }

h2 { margin-bottom: 1rem; }

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

/* Chart info badge in question list */
.q-chart-info {
  font-size: 0.75rem;
  color: var(--primary);
  background: #eef2ff;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.3rem;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-panel {
  background: white;
  border-radius: 16px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.2rem;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 {
  font-size: 1rem;
  margin: 0;
}
.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
}
.modal-close:hover { color: var(--text); }
.modal-body {
  padding: 1.2rem;
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.8rem 1.2rem;
  border-top: 1px solid var(--border);
}

/* Color theme selector */
.color-theme-options {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.color-theme-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  padding: 0.5rem 0.7rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  background: white;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text);
  transition: border-color 0.15s;
}
.color-theme-btn.active {
  border-color: var(--primary);
  background: #eef2ff;
}
.color-swatches {
  display: flex;
  gap: 3px;
}
.color-swatches span {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  display: block;
}

/* Debug panel */
.debug-panel {
  margin-top: 1.5rem;
  border: 2px dashed #f59e0b;
  border-radius: 12px;
  overflow: hidden;
}
.debug-summary {
  padding: 0.8rem 1.2rem;
  background: #fffbeb;
  color: #92400e;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.debug-summary::before {
  content: '\26A0';
  font-size: 1.1rem;
}
.debug-summary::-webkit-details-marker { display: none; }
.debug-content {
  padding: 1.2rem;
  background: #fffdf5;
}
.debug-section {
  margin-bottom: 1.2rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid #fde68a;
}
.debug-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.debug-section h4 {
  font-size: 0.95rem;
  color: #92400e;
  margin-bottom: 0.3rem;
}
.debug-desc {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.8rem;
}
.debug-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.5rem;
}
.debug-status {
  font-size: 0.85rem;
  color: var(--success);
}
.debug-per-question {
  margin-top: 0.8rem;
}
.debug-q-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
  padding: 0.4rem 0.6rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.85rem;
}
.debug-q-row .q-label { flex: 1; }
.debug-q-row .q-count {
  color: var(--muted);
  font-size: 0.8rem;
  min-width: 50px;
  text-align: right;
}