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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
  color: #333;
}

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

/* Header */
.header {
  text-align: center;
  margin-bottom: 30px;
  animation: fadeInDown 0.6s ease;
}

.header h1 {
  color: white;
  font-size: 2.5rem;
  margin-bottom: 10px;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.header p {
  color: rgba(255,255,255,0.9);
  font-size: 1.1rem;
}

/* Demo Banner */
.demo-banner {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  color: white;
  padding: 15px 25px;
  border-radius: 12px;
  margin-bottom: 25px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(240, 147, 251, 0.4);
  animation: slideInDown 0.5s ease;
}

/* Section Card */
.section {
  background: white;
  border-radius: 16px;
  padding: 30px;
  margin-bottom: 25px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.1);
  animation: fadeInUp 0.6s ease;
}

.section-title {
  font-size: 1.8rem;
  color: #2d3748;
  margin-bottom: 25px;
  padding-bottom: 15px;
  border-bottom: 3px solid transparent;
  background: linear-gradient(90deg, #667eea, #764ba2) border-box;
  border-image: linear-gradient(90deg, #667eea, #764ba2) 1;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 25px;
  background: #f7fafc;
  padding: 8px;
  border-radius: 12px;
}

.tab {
  flex: 1;
  padding: 14px 24px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: #718096;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.tab:hover {
  background: white;
  color: #667eea;
}

.tab.active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

/* Tab Content */
.tab-content {
  display: none;
  animation: fadeIn 0.4s ease;
}

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

/* Form */
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.form-group {
  margin-bottom: 0;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

label {
  display: block;
  margin-bottom: 8px;
  color: #4a5568;
  font-weight: 600;
  font-size: 0.95rem;
}

label.required::after {
  content: ' *';
  color: #e53e3e;
}

input, textarea, select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: #f7fafc;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: #667eea;
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea {
  min-height: 100px;
  resize: vertical;
  font-family: inherit;
}

.btn-submit {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 14px 36px;
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
  width: 100%;
  margin-top: 20px;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-submit:active {
  transform: translateY(0);
}

/* Cards List */
.cards-list {
  display: grid;
  gap: 20px;
}

.card {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  border-radius: 12px;
  padding: 24px;
  transition: all 0.3s ease;
  border-left: 5px solid #667eea;
  animation: fadeInUp 0.5s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.card-title {
  font-size: 1.4rem;
  color: #2d3748;
  font-weight: 700;
}

.card-badge {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.card-body {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.card-body p {
  color: #4a5568;
  line-height: 1.6;
  font-size: 0.95rem;
}

.card-body p strong {
  color: #2d3748;
  margin-right: 5px;
}

.card-footer {
  margin-top: 15px;
  padding-top: 15px;
  border-top: 1px solid rgba(0,0,0,0.1);
  font-size: 0.85rem;
  color: #718096;
}

/* Toast Notification */
.toast {
  position: fixed;
  top: 30px;
  right: 30px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 16px 28px;
  border-radius: 10px;
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
  z-index: 1000;
  animation: slideInRight 0.4s ease;
  display: none;
}

.toast.show {
  display: block;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInDown {
  from { opacity: 0; transform: translateY(-30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(100px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Responsive */
@media (max-width: 768px) {
  .header h1 {
    font-size: 1.8rem;
  }
  
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .card-body {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: 20px;
  }
}

@media (max-width: 480px) {
  body {
    padding: 10px;
  }
  
  .tabs {
    flex-direction: column;
  }
}