:root {
  --color-primary: #ff6b35;
  --color-secondary: #2e2e2e;
  --color-base: #faf8f6;
  --color-accent: #6b8e23;
  --color-white: #ffffff;
  --color-primary-light: #ff8b5f;
  --color-primary-dark: #e55a2a;
  --color-accent-light: #8bae3a;
  --color-accent-dark: #5a7a1c;
}

body {
  background-color: var(--color-base);
  font-family: sans-serif;
  margin: 0;
  color: var(--color-secondary);
}

header {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 1.5rem 0;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1rem;
  gap: 2rem;
}

.logo-container {
  flex-shrink: 0;
}

.logo {
  height: 48px;
  width: auto;
}

.header-content {
  flex-grow: 1;
  text-align: center;
}

.language-switch {
  flex-shrink: 0;
}

h1 {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--color-white);
}

p {
  margin-top: 0.5rem;
  font-size: 1.125rem;
  color: var(--color-white);
}

.language-switch select {
  padding: 0.5rem;
  border-radius: 0.375rem;
  background-color: var(--color-white);
  color: var(--color-secondary);
  border: none;
  font-weight: 500;
}

.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.intro-section {
  margin-bottom: 3rem;
  text-align: center;
  padding: 2rem 0;
}

.intro-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

.intro-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.intro-point {
  background-color: var(--color-white);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.intro-point:hover {
  transform: translateY(-5px);
}

.intro-icon {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
}

.intro-point h3 {
  color: var(--color-primary);
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.intro-point p {
  color: var(--color-secondary);
  font-size: 1rem;
  line-height: 1.5;
}

.intro-cta {
  text-align: center;
  margin-top: 2rem;
}

.intro-cta p {
  color: var(--color-secondary);
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

.cta-button {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 1rem 2rem;
  border-radius: 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  transition: all 0.3s ease;
}

.cta-button:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .intro-points {
    grid-template-columns: 1fr;
  }

  .intro-point {
    padding: 1.5rem;
  }

  .intro-icon {
    width: 48px;
    height: 48px;
  }
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-secondary);
}

.intro-image {
  margin: 1rem auto 0;
  width: 75%;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

@media (min-width: 768px) {
  .intro-image {
    width: 50%;
  }
}

button {
  margin-top: 1.5rem;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: var(--color-primary-dark);
}

button:disabled {
  background-color: #9ca3af;
  cursor: not-allowed;
}

.result-section {
  background-color: white;
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  margin-bottom: 3rem;
}

#phenoageResultPost {
  padding: 1rem;
  display: block !important;
  visibility: visible !important;
}

#phenoageResultPost p {
  margin-bottom: 1rem;
  display: block !important;
  visibility: visible !important;
}

#phenoageResultPost p span.zh-content,
#phenoageResultPost p span.en-content {
  display: block;
  visibility: visible;
  color: var(--color-secondary);
}

.chart-container {
  max-width: 32rem;
  margin: 1.5rem auto 0;
}

/* Styles for Percentile Bar Visualization */
.percentile-bar-container {
  position: relative;
  width: 100%;
  height: 25px; /* Height of the bar */
  margin-bottom: 2rem;
}

.percentile-bar {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to right,
    #ccc,
    #ff6b35
  ); /* Grey to Orange gradient */
  border-radius: 5px;
}

.percentile-marker {
  position: absolute;
  top: 50%;
  left: 0%; /* This will be set by JavaScript */
  transform: translate(-50%, -50%);
  width: 30px; /* Adjust size as needed */
  height: auto; /* Maintain aspect ratio */
  /* background-color: blue; Removed background color */
  /* border-radius: 50%; Removed border radius */
  border: none; /* Remove border */
  z-index: 1;
}

.percentile-labels {
  display: flex;
  justify-content: space-between;
  width: 100%;
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-secondary);
}

.metrics-section {
  display: grid;
  gap: 2rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .metrics-section {
    grid-template-columns: repeat(4, 1fr);
  }
}

.metric-card {
  background-color: var(--color-white);
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.metric-card:hover {
  transform: translateY(-5px);
}

.metric-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
}

.metric-image {
  margin-top: 0.5rem;
  width: 100%;
  border-radius: 0.5rem;
}

.calculator-section {
  background-color: white;
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  margin-bottom: 3rem;
}

.calculator-form {
  margin-top: 1.5rem;
  max-width: 28rem;
  margin-left: auto;
  margin-right: auto;
}

label {
  display: block;
  color: #4b5563;
}

input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #d1d5db;
  border-radius: 0.375rem;
  margin-top: 0.5rem;
}

.rhr-guide {
  margin-top: 1rem;
}

.rhr-guide h3 {
  font-size: 1.125rem;
  font-weight: 500;
}

.rhr-guide ol {
  list-style: decimal;
  list-style-position: inside;
  color: #4b5563;
  margin-top: 0.5rem;
}

.cta-section {
  text-align: center;
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: 3rem 1rem;
  border-radius: 0.5rem;
  margin-top: 3rem;
}

.cta-section h2 {
  color: var(--color-white);
}

.cta-section a {
  display: inline-block;
  margin-top: 1rem;
  background-color: var(--color-white);
  color: var(--color-accent);
  padding: 0.75rem 1.5rem;
  border-radius: 0.375rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.cta-section a:hover {
  background-color: var(--color-base);
  transform: translateY(-2px);
}

.waitlist-form {
  display: flex;
  gap: 1rem;
  max-width: 500px;
  margin: 2rem auto 0;
  padding: 0 1rem;
}

.waitlist-form input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 0.375rem;
  font-size: 1rem;
  min-width: 0;
}

.waitlist-form button {
  background-color: var(--color-white);
  color: var(--color-accent);
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.waitlist-form button:hover {
  background-color: var(--color-base);
  transform: translateY(-2px);
}

@media (max-width: 640px) {
  .waitlist-form {
    flex-direction: column;
  }

  .waitlist-form button {
    width: 100%;
  }
}

footer {
  background-color: var(--color-secondary);
  color: var(--color-white);
  padding: 2rem 0;
  text-align: center;
  margin-top: 3rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-logo {
  height: 40px;
  width: auto;
}

.footer-brand h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-white);
  margin: 0;
}

.footer-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.footer-links a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--color-primary-light);
}

.copyright {
  color: var(--color-white);
  opacity: 0.8;
  font-size: 0.875rem;
  margin: 0;
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }

  .footer-brand {
    flex-direction: row;
  }

  .footer-links {
    align-items: flex-end;
  }
}

.hidden {
  display: none;
}

/* PhenoAge Calculator Styles */
.phenoage-calculator {
  max-width: 600px;
  margin: 2rem auto;
  padding: 2rem;
  background: var(--color-white);
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.phenoage-calculator h3 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--color-secondary);
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--color-secondary);
  font-weight: 500;
}

.form-group input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 0.375rem;
  box-sizing: border-box;
  font-size: 1rem;
}

.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 0.375rem;
  box-sizing: border-box;
  font-size: 1rem;
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.2);
}

#calculateButton {
  width: 100%;
  padding: 1rem;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 6px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

#calculateButton:hover {
  background: var(--color-primary-dark);
}

.result {
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--color-base);
  border-radius: 8px;
  text-align: center;
}

.result.hidden {
  display: none;
}

.result h4 {
  color: var(--color-secondary);
  margin-bottom: 1rem;
}

#phenoageValue {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .header-container {
    flex-direction: column;
    text-align: center;
    gap: 1rem;
  }

  .logo {
    height: 40px;
  }

  .header-content {
    order: 2;
  }

  .language-switch {
    order: 3;
  }
}

/* Language-specific content visibility */
.zh-content {
  display: block;
}

.en-content {
  display: none;
}

html[lang="en"] .zh-content {
  display: none;
}

html[lang="en"] .en-content {
  display: block;
}

/* Add styles for metric card content */
.metric-card p {
  color: var(--color-secondary);
  margin-top: 1rem;
  line-height: 1.6;
}