/* ====================================
   Root Variables and Base Styles
   ==================================== */
/* Root Variables */
:root {
  --primary-color: #81b71a;
  --secondary-color: #4ebbf7;
  --tertiary-color: #6d6d6d;
  --text-color: #000000;
  --background-light: #ffffff;

  /* Gradients */
  --primary-gradient: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );

  /* Typography */
  --heading-font: Helvetica, Arial, sans-serif;
  --body-font: Arial, sans-serif;
}

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

body {
  font-family: var(--body-font);
  line-height: 1.8;
  background: #fafafa;
  color: var(--text-color);
}

.container {
  width: 100%;
  max-width: 1800px;
  margin: 0 auto;
  overflow: hidden;
}

/* Article 4 Styles */
.article-4 {
  padding: 100px 40px;
  background: linear-gradient(135deg, #ffffff, #f8f9fa);
  position: relative;
  overflow: hidden;
}

/* Background Pattern */
.article-4::before {
  content: "";
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: radial-gradient(
    circle at 70% 30%,
    rgba(129, 183, 26, 0.1),
    transparent 60%
  );
  pointer-events: none;
}

.article-4 .article-content {
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

/* Intro Banner */
.article-4 .intro-banner {
  text-align: center;
  margin-bottom: 60px;
  padding: 40px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-radius: 30px;
  border: 1px solid rgba(129, 183, 26, 0.2);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.article-4 h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--tertiary-color);
  line-height: 1.2;
}

.article-4 h2 em {
  color: var(--primary-color);
  font-style: italic;
}

/* Treatment History */
.article-4 .treatment-history {
  margin: 60px 0;
}

.article-4 .history-text {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px;
}

.article-4 .history-text h3 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--tertiary-color);
  margin-bottom: 20px;
}

.article-4 .lead-text {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  color: var(--tertiary-color);
}

/* Treatment Grid */
.article-4 .treatment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.article-4 .treatment-item {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-radius: 20px;
  padding: 30px;
  border: 1px solid rgba(129, 183, 26, 0.2);
  transition: transform 0.3s ease;
}

.article-4 .treatment-item:hover {
  transform: translateY(-5px);
}

.article-4 .treatment-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.article-4 .treatment-icon {
  font-size: 2rem;
}

.article-4 .treatment-item h4 {
  font-size: clamp(1.2rem, 2vw, 1.4rem);
  color: var(--tertiary-color);
}

/* Problem Explanation */
.article-4 .problem-explanation {
  background: var(--primary-gradient);
  color: white;
  padding: 60px;
  border-radius: 30px;
  margin: 80px 0;
}

.article-4 .explanation-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.article-4 .explanation-text h3 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 30px;
}

.article-4 .explanation-text .emphasis {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  margin-bottom: 20px;
  font-weight: bold;
}

.article-4 .explanation-image img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  border: 4px solid rgba(255, 255, 255, 0.2);
}

.article-4 .explanation-image figcaption {
  color: white;
  text-align: center;
  margin-top: 15px;
  opacity: 0.8;
}

/* Key Insight */
.article-4 .key-insight {
  text-align: center;
  max-width: 900px;
  margin: 60px auto;
  padding: 40px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-radius: 30px;
  border: 1px solid rgba(129, 183, 26, 0.2);
}

.article-4 .key-insight h3 {
  font-size: clamp(1.6rem, 3vw, 2rem);
  color: var(--tertiary-color);
  margin-bottom: 30px;
}

.article-4 .highlight-box {
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  color: var(--tertiary-color);
  margin-bottom: 20px;
}

/* Warning Note */
.article-4 .warning-note {
  background: rgba(129, 183, 26, 0.1);
  padding: 30px;
  border-radius: 20px;
  max-width: 800px;
  margin: 40px auto 0;
}

.article-4 .warning-note p {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--tertiary-color);
}

.article-4 .warning-note strong {
  color: var(--primary-color);
}

/* Text Highlights */
.highlight-primary {
  color: var(--primary-color);
  font-weight: 600;
}

.highlight-secondary {
  color: var(--secondary-color);
  font-weight: 600;
}

/* Responsive Design */
@media (max-width: 992px) {
  .article-4 .explanation-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .article-4 {
    padding: 60px 20px;
  }

  .article-4 .intro-banner,
  .article-4 .key-insight {
    padding: 30px;
  }

  .article-4 .problem-explanation {
    padding: 40px;
  }

  .article-4 .treatment-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .article-4 {
    padding: 40px 15px;
  }

  .article-4 .intro-banner,
  .article-4 .key-insight {
    padding: 20px;
  }

  .article-4 .problem-explanation {
    padding: 30px;
  }
}