:root {
  --primary: #1e40af;
  --secondary: #10b981;
  --dark: #111827;
}
body {
  font-family: 'Poppins', sans-serif;
  background-color: #f8fafc;
  color: #374151;
}
.header-top {
  background: var(--dark);
  color: white;
  padding: 8px 0;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
}
.navbar-brand img { 
  height: 55px; 
}
 /* Section title */
 .section-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  position: relative;
  padding-bottom: 10px;
  margin-bottom: 25px;
  display: inline-block;
}
.section-title:after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 70px;
  height: 4px;
  background: var(--secondary);
  border-radius: 3px;
}

/* Article cards */
.article-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.08);
  margin-bottom: 25px;
  transition: 0.3s ease;
}
.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.12);
}

.badge-type {
  font-size: 0.75rem;
  padding: 6px 12px;
  border-radius: 20px;
  font-weight: 600;
}

.btn-abstract, .btn-pdf {
  font-size: 0.78rem;
  padding: 7px 16px;
  border-radius: 7px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-abstract { background: var(--primary); color: white !important; }
.btn-pdf { background: #dc2626; color: white !important; }

/* Sidebar */
.sidebar-box {
  background: white;
  border-radius: 12px;
  padding: 18px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.08);
  margin-bottom: 20px;
  border-left: 5px solid var(--secondary);
}

/* Footer */
.footer {
  background: var(--dark);
  color: white;
  padding: 50px 10px 20px;
  margin-top: 70px;
}

/* Responsive enhancements */
@media (max-width: 992px) {
  .navbar-nav .nav-link {
      padding: 10px 0;
      border-bottom: 1px solid #eee;
  }
}

@media (max-width: 768px) {
  .section-title {
      font-size: 1.25rem;
  }
  .article-card h5 {
      font-size: 1rem;
  }
  .sidebar-box h6 {
      font-size: 0.95rem;
  }
  .navbar-brand img { height: 45px; }
  .btn-abstract, .btn-pdf {
      width: 100%;
      justify-content: center;
      margin-bottom: 8px;
  }
}

@media (max-width: 576px) {
  .header-top { font-size: 0.82rem; }
  p, .small { font-size: 0.82rem; }
}
  /* About Journal Heading with Green Underline */
  .page-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--primary);
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
    margin-bottom: 50px;
}
.page-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100px;
    height: 6px;
    background: var(--secondary);
    border-radius: 4px;
}

/* Desktop Sidebar */
.about-sidebar-wrapper {
    position: sticky;
    top: 20px;
    align-self: flex-start;
    max-height: calc(100vh - 40px);
    overflow-y: auto;
}
.about-sidebar {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    padding: 30px 15px;
}
.about-sidebar .nav-link {
    color: #374151;
    padding: 14px 20px;
    font-weight: 500;
    border-left: 4px solid transparent;
    border-radius: 8px;
    margin: 5px 10px;
    transition: all 0.3s ease;
    font-size: 0.95rem;
}
.about-sidebar .nav-link:hover,
.about-sidebar .nav-link.active {
    background: #ecfdf5;
    color: var(--primary);
    border-left-color: var(--secondary);
    font-weight: 600;
}

/* Mobile Toggle Menu */
.mobile-menu-toggle {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    width: 100%;
    text-align: left;
    margin-bottom: 15px;
    display: none;
}
.mobile-menu-toggle i {
    float: right;
    transition: transform 0.3s;
}
.mobile-menu-toggle[aria-expanded="true"] i {
    transform: rotate(180deg);
}

/* Content */
.about-content {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    line-height: 1.9;
}
.about-content h4 {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.4rem;
    margin: 50px 0 22px;
    padding-bottom: 10px;
    border-bottom: 3px solid #e0e7ff;
    display: inline-block;
}
.about-content p, .about-content ol {
    margin-bottom: 20px;
    text-align: justify;
}

/* Responsive Adjustments */
@media (max-width: 992px) {
    .page-title {
        font-size: 2rem;
        text-align: center;
    }
    .page-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    .mobile-menu-toggle {
        display: block;
    }
    .about-sidebar-wrapper {
        position: static;
        max-height: none;
    }
    .about-sidebar {
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }
    .about-content {
        padding: 25px;
    }
    .about-content h4 {
        font-size: 1.3rem;
    }
}

@media (max-width: 576px) {
    .page-title {
        font-size: 1.8rem;
    }
    .about-content {
        padding: 20px;
    }
    .about-content h4 {
        font-size: 1.25rem;
    }
}
.fixed-menu {
            position: sticky;
            top: 0;
            z-index: 9999;
        }