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

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --secondary: #6b7280;
  --secondary-hover: #4b5563;
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --bg: #f9fafb;
  --card-bg: #ffffff;
  --text: #111827;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.navbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand a {
  color: var(--primary);
  text-decoration: none;
  font-weight: bold;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 15px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--secondary);
  color: white;
}

.btn-secondary:hover {
  background: var(--secondary-hover);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
}

.badge {
  background: var(--primary);
  color: white;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: bold;
}

.option {
  padding: 8px 12px;
  margin: 4px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
}

.option.selected {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.question-answer {
  margin-top: 8px;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

.auth-card {
  max-width: 400px;
  margin: 60px auto;
}

.hero {
  text-align: center;
  padding: 100px 20px;
}

.hero h1 {
  font-size: 3rem;
  color: var(--primary);
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 40px;
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.tab {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
}

.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
  font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.checkbox-label {
  display: flex !important;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.checkbox-label input {
  width: auto !important;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.page-header h2 {
  font-size: 1.5rem;
}

.survey-list {
  display: grid;
  gap: 16px;
}

.survey-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.survey-item h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.survey-item .meta {
  font-size: 12px;
  color: var(--text-muted);
}

.survey-item .actions {
  display: flex;
  gap: 8px;
}

.survey-status {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
}

.survey-status.active {
  background: #d1fae5;
  color: #065f46;
}

.survey-status.inactive {
  background: #fee2e2;
  color: #991b1b;
}

.question-item {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  position: relative;
}

.question-item .question-type {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.question-item .question-title {
  font-weight: 500;
  margin: 6px 0;
}

.question-item .question-required {
  color: var(--danger);
}

.question-item .question-options {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}

.question-item .question-actions {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  gap: 6px;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 24px 0;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.qr-card {
  text-align: center;
}

.qr-link {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
  word-break: break-all;
}

.response-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
}

.response-meta {
  color: var(--text-muted);
  margin-top: 8px;
}

.qr-panel {
  text-align: center;
  min-width: 220px;
}

#qrcode {
  display: inline-block;
  padding: 16px;
  background: white;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

#qrcode canvas {
  display: block;
}

.stats-card {
  display: flex;
  gap: 40px;
  margin-bottom: 20px;
}

.stat {
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--primary);
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}

.survey-fill .card {
  max-width: 700px;
  margin: 40px auto;
}

.survey-fill h2 {
  margin-bottom: 8px;
}

.survey-desc {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.survey-question {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.survey-question:last-of-type {
  border-bottom: none;
}

.survey-question label {
  font-weight: 500;
  display: block;
  margin-bottom: 8px;
}

.survey-question .required-star {
  color: var(--danger);
}

.survey-question input[type="text"],
.survey-question textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.survey-question input[type="radio"],
.survey-question input[type="checkbox"] {
  margin-right: 8px;
}

.survey-question .radio-option,
.survey-question .checkbox-option {
  display: block;
  margin: 8px 0;
}

.rating-options {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.rating-options label {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
}

.rating-options input {
  margin-top: 6px;
}

.success-card {
  text-align: center;
  max-width: 400px;
  margin: 40px auto;
}

.success-icon {
  width: 60px;
  height: 60px;
  background: var(--success);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin: 0 auto 20px;
}

.message {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-top: 16px;
  font-size: 14px;
}

.message.error {
  background: #fee2e2;
  color: #991b1b;
}

.message.success {
  background: #d1fae5;
  color: #065f46;
}

.response-item {
  padding: 16px;
  background: var(--bg);
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.response-item .response-time {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.response-item .response-answer {
  font-size: 14px;
}

.stat-overview {
  margin-bottom: 20px;
}

.stat-overview h4 {
  margin-bottom: 8px;
}

.stat-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.stat-bar .stat-label {
  min-width: 100px;
  font-size: 13px;
}

.stat-bar .stat-fill {
  flex: 1;
  height: 20px;
  background: var(--bg);
  border-radius: 4px;
  overflow: hidden;
}

.stat-bar .stat-fill-inner {
  height: 100%;
  background: var(--primary);
  transition: width 0.3s;
}

.stat-bar .stat-count {
  min-width: 60px;
  text-align: right;
  font-size: 13px;
}

#responsesList {
  max-height: 400px;
  overflow-y: auto;
}

@media (max-width: 768px) {
  .container {
    padding: 12px;
  }
  
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .actions {
    flex-direction: column;
  }
  
  .actions .btn {
    width: 100%;
  }
}