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

body {
  font-family: "Inter", sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  background: white;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.header {
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  color: white;
  padding: 40px;
  text-align: center;
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.header p {
  font-size: 1.1rem;
  opacity: 0.9;
  font-weight: 300;
}

.proposal-form {
  padding: 40px;
}

.form-group {
  margin-bottom: 30px;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  color: #2d3748;
  margin-bottom: 8px;
  letter-spacing: 0.025em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 16px 20px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
  background: #f8fafc;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #667eea;
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  transform: translateY(-2px);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #a0aec0;
  font-weight: 400;
}

.generate-btn {
  width: 100%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 18px 32px;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  letter-spacing: 0.025em;
}

.generate-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
}

.generate-btn:active {
  transform: translateY(-1px);
}

.btn-icon {
  font-size: 1.2rem;
}

.output-section {
  background: #f8fafc;
  padding: 40px;
  border-top: 1px solid #e2e8f0;
}

.output-section h3 {
  color: #2d3748;
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.proposal-output {
  background: white;
  padding: 24px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  white-space: pre-wrap;
  font-size: 1rem;
  line-height: 1.7;
  color: #2d3748;
  margin-bottom: 20px;
  max-height: 400px;
  overflow-y: auto;
}

.copy-btn {
  background: #48bb78;
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.copy-btn:hover {
  background: #38a169;
  transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  .header {
    padding: 30px 20px;
  }

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

  .proposal-form,
  .output-section {
    padding: 30px 20px;
  }

  .form-group input,
  .form-group textarea {
    padding: 14px 16px;
  }

  .generate-btn {
    padding: 16px 24px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 1.8rem;
  }

  .header p {
    font-size: 1rem;
  }

  .proposal-form,
  .output-section {
    padding: 20px 15px;
  }
}