:root {
  --primary-color: #0071e3;
  --primary-hover: #0077ed;
  --text-color: #333;
  --light-gray: #f5f5f7;
  --medium-gray: #d2d2d7;
  --dark-gray: #86868b;
  --border-radius: 8px;
  --box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font-family);
  color: var(--text-color);
  background-color: var(--light-gray);
  line-height: 1.6;
}

.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--medium-gray);
}

h1, h2, h3 {
  font-weight: 600;
}

.actions {
  display: flex;
  gap: 10px;
}

.btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 10px 16px;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

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

.btn-small {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-add {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
  padding: 8px 14px;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 14px;
  margin-top: 10px;
  transition: var(--transition);
}

.btn-add:hover {
  background-color: rgba(0, 113, 227, 0.1);
}

.btn-remove {
  background-color: transparent;
  color: #ff3b30;
  border: 1px solid #ff3b30;
  padding: 6px 12px;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 13px;
  margin-top: 10px;
  align-self: flex-start;
  transition: var(--transition);
}

.btn-remove:hover {
  background-color: rgba(255, 59, 48, 0.1);
}

.editor-container {
  display: grid;
  grid-template-columns: 200px 1fr 1fr;
  gap: 20px;
  height: calc(100vh - 120px);
}

.sidebar {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 20px;
  height: 100%;
  overflow-y: auto;
}

.section-nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section-btn {
  background-color: transparent;
  border: none;
  text-align: left;
  padding: 10px;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
}

.section-btn:hover {
  background-color: var(--light-gray);
}

.section-btn.active {
  background-color: var(--light-gray);
  font-weight: 500;
  color: var(--primary-color);
}

.form-container {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 25px;
  height: 100%;
  overflow-y: auto;
}

.form-section {
  display: none;
}

.form-section.active {
  display: block;
}

.form-section h2 {
  margin-bottom: 20px;
  font-size: 18px;
}

.form-group {
  margin-bottom: 15px;
}

.form-row {
  display: flex;
  gap: 15px;
}

.form-row .form-group {
  flex: 1;
}

label {
  display: block;
  margin-bottom: 5px;
  font-size: 14px;
  color: var(--dark-gray);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="month"],
textarea,
select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--medium-gray);
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: 14px;
  transition: var(--transition);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(0, 113, 227, 0.2);
}

textarea {
  resize: vertical;
}

.checkbox-group {
  display: flex;
  align-items: center;
  margin-top: 5px;
}

.checkbox-group input {
  margin-right: 5px;
}

.checkbox-group label {
  margin-bottom: 0;
  font-size: 13px;
}

.item-container {
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  padding: 15px;
  margin-bottom: 15px;
}

.preview-container {
  height: 100%;
  overflow-y: auto;
  background-color: var(--light-gray);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 25px;
}

.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.tag {
  background-color: var(--light-gray);
  padding: 5px 10px;
  border-radius: 20px;
  font-size: 13px;
  display: flex;
  align-items: center;
}

.tag-remove {
  margin-left: 5px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

.image-preview {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: var(--light-gray);
  margin-top: 10px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.image-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.empty-notice {
  color: var(--dark-gray);
  font-style: italic;
  font-size: 14px;
}