:root {
  --primary-color: #9b59b6;
  --secondary-color: #f8f9fa;
  --text-dark: #2a2a2a;
  --text-light: #444;
  --white: #ffffff;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
  --border-radius: 8px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Arial', sans-serif;
}

/* Header & Navigation */
header {
  background-color: var(--primary-color);
  padding: 1rem;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1000;
}

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

.logo {
  color: var(--white);
  font-size: clamp(1.2rem, 3vw, 2rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
  align-items: center;
}

.nav-links a {
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem;
  border-radius: 4px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-links a:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Article Section */
.article-container {
  max-width: 1200px;
  margin: 3rem auto;
  padding: 2rem;
  background-color: var(--white);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.article-header h1 {
  color: var(--text-dark);
  font-size: clamp(2rem, 4vw, 2.5rem);
  margin-bottom: 1rem;
}

.article-content {
  line-height: 1.8;
  color: var(--text-light);
  font-size: 1.1rem;
}

.article-image {
  width: 100%;
  height: clamp(250px, 40vw, 400px);
  object-fit: cover;
  border-radius: var(--border-radius);
  margin: 2rem 0;
}

.article-content h2 {
  color: var(--primary-color);
  margin: 2.5rem 0 1.5rem;
  font-size: clamp(1.5rem, 3vw, 1.8rem);
}

.highlight {
  background-color: var(--secondary-color);
  padding: 1.5rem;
  border-left: 4px solid var(--primary-color);
  margin: 2rem 0;
  border-radius: 4px;
}

.callout {
  font-size: 1.2rem;
  text-align: center;
  padding: 2rem;
  margin: 3rem 0;
  background-color: var(--secondary-color);
  border-radius: var(--border-radius);
}

/* Footer */
.footer {
  background-color: #2a2a2a;
  color: var(--white);
  padding: 2rem 0;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.social-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
}

.social-item {
  color: var(--white);
  font-size: 1.5rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
}

.social-item:hover {
  color: var(--primary-color);
  background-color: rgba(255, 255, 255, 0.2);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    flex-wrap: wrap;
    justify-content: center;
  }

  .article-container {
    margin: 2rem auto;
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* styles.css */
:root {
  --primary-color: #9b59b6;
  --secondary-color: #f8f9fa;
  --text-dark: #2a2a2a;
  --text-light: #444;
  --white: #ffffff;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
  --border-radius: 8px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Arial', sans-serif;
}

/* Header & Navigation */
header {
  background-color: var(--primary-color);
  padding: 1rem;
  box-shadow: var(--shadow);
  position: relative;
  z-index: 1000;
}

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

.logo {
  color: var(--white);
  font-size: clamp(1.2rem, 3vw, 2rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
  align-items: center;
}

.nav-links a {
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem;
  border-radius: 4px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-links a:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Presenter Page Styles */
.presenter-main {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.slogan {
  text-align: center;
  font-size: 1.8rem;
  color: var(--primary-color);
  margin: 2rem 0;
}

.bio-card {
  background: var(--white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
  overflow: hidden;
  transition: var(--transition);
}

.bio-card:hover {
  transform: translateY(-3px);
}

.bio-preview {
  display: flex;
  align-items: center;
  padding: 1.5rem;
  gap: 1.5rem;
  cursor: pointer;
}

.bio-img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid var(--primary-color);
}

.bio-title {
  color: var(--primary-color);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.bio-summary {
  color: var(--text-light);
  margin-bottom: 1rem;
}

.read-more-btn {
  background: var(--primary-color);
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.read-more-btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.bio-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 1.5rem;
}

.bio-details.expanded {
  max-height: 2000px;
  padding: 1.5rem;
}

/* Footer */
.footer {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 2rem 0;
  margin-top: 3rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.social-links {
  display: flex;
  gap: 1.5rem;
}

.social-item {
  color: var(--white);
  font-size: 1.5rem;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
}

.social-item:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.footer-copy {
  text-align: center;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .bio-preview {
    flex-direction: column;
    text-align: center;
  }

  .bio-img {
    margin: 0 auto 1rem;
  }

  .footer-row {
    flex-direction: column;
    gap: 1.5rem;
  }
}