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

:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --secondary: #10b981;
  --background: #f9fafb;
  --surface: #ffffff;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --error: #ef4444;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Header Styles */
.header {
  text-align: center;
  margin-bottom: 3rem;
}

.logo {
  display: inline-flex;
  margin-bottom: 1rem;
  animation: fadeInDown 0.6s ease-out;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  animation: fadeInDown 0.6s ease-out 0.1s both;
}

.subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  animation: fadeInDown 0.6s ease-out 0.2s both;
}

/* Content Layout */
.content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

/* Form Section */
.form-section {
  background: var(--surface);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  animation: fadeInLeft 0.6s ease-out;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.2s;
  font-family: inherit;
}

.form-group input[type="text"]:focus,
.form-group input[type="url"]:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group input[type="color"] {
  width: 100%;
  height: 50px;
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.form-group input[type="color"]:hover {
  border-color: var(--primary);
}

.helper-text {
  display: block;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

/* Button Styles */
.btn-primary {
  width: 100%;
  padding: 1rem 2rem;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  box-shadow: var(--shadow);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Preview Section */
.preview-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  animation: fadeInRight 0.6s ease-out;
}

.preview-card,
.info-card {
  background: var(--surface);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
}

.preview-card h3,
.info-card h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.preview-area {
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--background);
  border-radius: 8px;
  padding: 2rem;
  border: 2px dashed var(--border);
}

.placeholder {
  text-align: center;
  color: var(--text-secondary);
}

.placeholder p {
  margin-top: 1rem;
  font-size: 0.875rem;
}

.preview-area img,
.preview-area svg {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.preview-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.btn-secondary {
  flex: 1;
  padding: 0.75rem 1.5rem;
  background: var(--surface);
  color: var(--primary);
  border: 2px solid var(--primary);
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

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

/* Info Card */
.info-card ul {
  list-style: none;
}

.info-card li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.info-card li:last-child {
  border-bottom: none;
}

.info-card li strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.footer a:hover {
  text-decoration: underline;
}

/* Loading State */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

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

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

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

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  .header h1 {
    font-size: 2rem;
  }

  .content {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .preview-area {
    min-height: 300px;
  }
}

/* Alert Messages */
.alert {
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

.alert-success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.hidden {
  display: none;
}