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

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

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

header {
  text-align: center;
  color: white;
  margin-bottom: 30px;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: 8px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
  font-size: 1.1rem;
  opacity: 0.95;
}

.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-bottom: 30px;
}

@media (max-width: 1024px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
}

/* Form Section */
.form-section, .preview-section {
  background: white;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.15);
}

h2 {
  font-size: 1.5rem;
  color: #2d3748;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #667eea;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  color: #4a5568;
  font-size: 0.95rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

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

.form-group textarea {
  resize: vertical;
  font-family: inherit;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 25px;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  flex: 1;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
  background: #e2e8f0;
  color: #4a5568;
}

.btn-secondary:hover {
  background: #cbd5e0;
}

.btn-print {
  background: #48bb78;
  color: white;
  margin-right: 10px;
}

.btn-print:hover {
  background: #38a169;
}

.btn-copy {
  background: #4299e1;
  color: white;
}

.btn-copy:hover {
  background: #3182ce;
}

/* Certificate Preview */
.preview-toolbar {
  margin-bottom: 20px;
  display: flex;
  gap: 10px;
}

.certificate {
  background: #fffef8;
  border: 3px solid #2d3748;
  border-radius: 4px;
  padding: 40px;
  position: relative;
  min-height: 500px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.cert-header {
  text-align: center;
  margin-bottom: 30px;
  border-bottom: 2px solid #2d3748;
  padding-bottom: 20px;
}

.company-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: #2d3748;
  margin-bottom: 15px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.cert-title {
  font-size: 2rem;
  font-weight: 900;
  color: #1a202c;
  margin-bottom: 8px;
  letter-spacing: 3px;
}

.cert-subtitle {
  font-size: 1.1rem;
  color: #4a5568;
  font-style: italic;
}

.cert-body {
  line-height: 2;
  font-size: 1.05rem;
}

.cert-date {
  text-align: right;
  margin-bottom: 25px;
  color: #4a5568;
}

.cert-number {
  margin-left: 30px;
  font-weight: 600;
}

.cert-content p {
  margin-bottom: 15px;
  text-align: justify;
}

.cert-debt-block {
  background: #fff5f5;
  border-left: 4px solid #e53e3e;
  padding: 20px;
  margin: 25px 0;
  border-radius: 0 8px 8px 0;
}

.cert-debt-label {
  font-weight: 700;
  color: #c53030;
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.cert-debt-amount {
  font-size: 1.3rem;
  color: #1a202c;
  margin-bottom: 8px;
}

.cert-debt-period {
  color: #4a5568;
  font-style: italic;
}

.cert-footer {
  margin-top: 40px;
  padding-top: 25px;
  border-top: 2px solid #e2e8f0;
}

.cert-purpose {
  color: #718096;
  font-style: italic;
  margin-bottom: 30px;
  text-align: center;
}

.cert-signature {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-top: 40px;
}

.signature-line {
  flex: 1;
}

.sig-role {
  font-weight: 600;
  color: #2d3748;
  font-size: 1.1rem;
}

.signature-space {
  text-align: right;
  color: #718096;
}

.signature-space span {
  display: block;
}

.sig-date {
  margin-top: 8px;
  font-size: 0.95rem;
}

.cert-watermark {
  position: absolute;
  bottom: 20px;
  right: 30px;
  font-size: 0.85rem;
  color: #cbd5e0;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  transform: rotate(-5deg);
}

footer {
  text-align: center;
  color: white;
  opacity: 0.9;
  padding: 20px;
}

/* Print styles */
@media print {
  body {
    background: white;
    padding: 0;
  }

  .form-section,
  .preview-toolbar,
  header,
  footer {
    display: none !important;
  }

  .main-grid {
    display: block;
  }

  .preview-section {
    box-shadow: none;
    padding: 0;
  }

  .certificate {
    border: 2px solid #000;
    box-shadow: none;
    padding: 30px;
  }

  .btn {
    display: none;
  }
}