/* CSS Custom Properties for theming */
:root {
  --primary-color: #0a2d77;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --success-color: #059669;
  --warning-color: #d97706;
  --danger-color: #dc2626;
  --background-color: #e9f3ff;
  --surface-color: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #0a2d77;
  --border-radius: 8px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

/* Container and layout */
.container {
  display: flex;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
  min-height: 100vh;
  flex-direction: column;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border-color);
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

/* Main content */
.main-content {
  flex: 1;
}

/* Introduction section */
.intro-section {
  background: var(--surface-color);
  padding: 0.4rem 1.4rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1rem;
  border-left: 4px solid var(--primary-color);
}

.intro-text {
  font-size: 1rem;
  color: var(--text-primary);
  margin: 1rem 0rem;
}

.instructions-list {
  list-style: none;
  padding: 0;
}

.instructions-list li {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.1;
}

.instructions-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 0;
  color: rgb(215, 47, 47);
  font-weight: bold;
  font-size: 1rem;
}

/* Form styles */
.calculator-form {
  background: var(--surface-color);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.radio-group-label {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-group input[type="number"],
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  background: var(--surface-color);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

.input-helper {
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.radio-alignment {
  display: flex;
  gap: 0.75rem;
}

.radio-alignment input {
  width: auto;
}

.radio-label {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
}

/* Submit button */
.submit-btn {
  width: 100%;
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 1rem 2rem;
  font-size: 1.125rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.submit-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

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

.submit-btn:disabled {
  background: var(--secondary-color);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-loader {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  display: none;
}

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

.submit-btn.loading .btn-text {
  opacity: 0.7;
}

.submit-btn.loading .btn-loader {
  display: block;
}

/* Result section */
.result-section {
  background: var(--surface-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  opacity: 0.6;
  transition: opacity 0.3s ease;
}

.result-section.active {
  opacity: 1;
}

.result-card {
  padding: 2rem;
  text-align: center;
}

.result-card h2 {
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.risk-percentage {
  font-size: 4rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 1rem;
  transition: all 0.3s ease;
}

.risk-percentage.high-risk {
  color: var(--danger-color);
}

.risk-percentage.medium-risk {
  color: var(--warning-color);
}

.risk-percentage.low-risk {
  color: var(--success-color);
}

.risk-interpretation {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--background-color);
  border-radius: var(--border-radius);
}

.disclaimer {
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  margin-top: 1rem;
}

/* Footer */
.footer {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Responsive design */
/* @media (max-width: 300px) {
  .container {
    padding: 1rem 0.5rem;
  }

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

  .calculator-form {
    padding: 1.5rem;
  }

  .radio-group {
    flex-direction: column;
    gap: 1rem;
  }

  .risk-percentage {
    font-size: 3rem;
  }
} */

/* Form validation states */
.form-group input:invalid:not(:focus):not(:placeholder-shown),
.form-group select:invalid:not(:focus) {
  border-color: var(--danger-color);
}

.form-group input:valid,
.form-group select:valid {
  border-color: var(--success-color);
}

/* Smooth animations */
.result-section,
.calculator-form,
.intro-section {
  animation: fadeInUp 0.5s ease forwards;
}

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