/* ===== CSS Variables ===== */
/* articles.css - Updated Header and Toggle Styles */
/* ===== CSS Variables ===== */
:root {
  --primary: #2c3e50;
  --secondary: #8e44ad;
  --accent: #8e44ad;
  --secondary-color: #3498db;
  --light: #f9f9f9;
  --dark: #1a1a1a;
  --white: #ffffff;
  --text: #333;
  --muted: #7f8c8d;
}

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.7;
  font-size: 1rem;
  background: var(--white);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

/* ===== Header ===== */
header {
  background: var(--white);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  padding: 1rem 0;
}

.header-content {
  width: 90%;
  max-width: 1200px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  flex: 1;
}

.logo i {
  margin-right: 0.5rem;
  color: var(--accent);
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  color: var(--primary);
  cursor: pointer;
  transition: transform 0.3s ease;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1001;
}

.menu-toggle.active i::before {
  content: "\f00d"; /* FontAwesome close icon */
}

nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

nav ul li a {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-weight: 500;
  color: var(--primary);
  text-decoration: none;
}

nav ul li a:hover,
nav ul li a.active {
  color: var(--accent);
  background: rgba(142, 68, 173, 0.08);
}

/* ===== Mobile Styling ===== */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .logo {
    padding-right: 2.5rem; /* Space for the toggle */
  }

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--white);
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  }

  nav.active {
    max-height: 500px;
  }

  nav ul {
    flex-direction: column;
    align-items: center;
    padding: 1rem 0;
    gap: 0;
  }

  nav ul li {
    width: 100%;
    text-align: center;
  }

  nav ul li a {
    display: block;
    width: 100%;
    padding: 1rem;
  }
}


body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.7;
  font-size: 1rem;
  background: var(--white);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

img {
  max-width: 100%;
  display: block;
  border-radius: 8px;
}


/* ===== Layout Container ===== */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 3rem auto;
}

/* ===== Back Link ===== */
.back-link {
  display: inline-flex;
  align-items: center;
  margin-bottom: 2rem;
  font-weight: 500;
  color: var(--accent);
  transition: transform 0.3s ease, color 0.3s ease;
}

.back-link:hover {
  color: var(--primary);
  transform: translateX(-6px);
}

.back-link i {
  margin-right: 0.5rem;
}

/* ===== Page Header ===== */
.page-header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem;
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff, #f4f6f8);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
}

.page-header h1 {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
  position: relative;
}

.page-header h1::after {
  content: "";
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 4px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--secondary-color), var(--accent));
}

.page-header p {
  max-width: 720px;
  margin: auto;
  font-size: 1.1rem;
  color: var(--muted);
}

/* ===== Publications Grid ===== */
/* ===== Page Container ===== */
.publications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  padding: 2rem 1rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* ===== Publication Card ===== */
.publication-card {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 6px 16px rgba(0,0,0,0.08);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  padding: 1.75rem;  /* 🔥 more internal padding */
}

.publication-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 22px rgba(0,0,0,0.12);
}

/* ===== Title ===== */
.publication-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #2c3e50;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

/* ===== Meta Info ===== */
.publication-meta {
  font-size: 0.9rem;
  color: #7f8c8d;
  margin-bottom: 1rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===== Description ===== */
.publication-description {
  font-size: 0.95rem;
  color: #444;
  margin-bottom: 1rem;
  line-height: 1.55;
}

/* ===== See More/Less ===== */
.see-more {
  color: #3498db;
  font-weight: 500;
  cursor: pointer;
  margin-bottom: 1rem;
  display: inline-block;
  transition: color 0.3s;
}

.see-more:hover {
  color: #21618c;
}

/* ===== Read Article Link ===== */
.publication-link {
  text-decoration: none;
  font-size: 0.95rem;
  color: #3498db;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  margin-top: auto;
  transition: color 0.3s;
}

.publication-link i {
  margin-right: 8px;
}

.publication-link:hover {
  color: #21618c;
}

/* ===== Responsive Tweaks ===== */
@media (max-width: 600px) {
  .publication-card {
    padding: 1.25rem;
  }
  
  .publication-title {
    font-size: 1.1rem;
  }

  .publication-meta {
    font-size: 0.85rem;
  }

  .publication-description {
    font-size: 0.9rem;
  }
}


/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(to right, var(--accent), #6c3483);
  color: #fff;
  box-shadow: 0 4px 14px rgba(142, 68, 173, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(to right, #6c3483, #5b2c6f);
  transform: translateY(-2px);
}

.btn-outline {
  border: 2px solid var(--accent);
  color: var(--accent);
  background: transparent;
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* ===== Footer ===== */
footer {
  background: var(--primary);
  color: var(--white);
  padding: 3rem 0 2rem;
  margin-top: 5rem;
}

.footer-content {
  width: 90%;
  max-width: 1200px;
  margin: auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2.5rem;
}

.footer-section h3 {
  font-size: 1.2rem;
  margin-bottom: 1.2rem;
  color: var(--white);
}

.footer-section p,
.footer-links a {
  color: #bdc3c7;
  font-size: 0.95rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.6rem;
}

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

.footer-bottom {
  text-align: center;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.85rem;
  color: #bdc3c7;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  nav {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    background: var(--white);
    padding: 1.5rem;
    transition: left 0.3s ease;
  }
  nav.active {
    left: 0;
  }
  nav ul {
    flex-direction: column;
    gap: 1rem;
  }
  .page-header h1 {
    font-size: 2rem;
  }
  .publications-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .header-content {
    flex-direction: column;
    gap: 0.8rem;
  }
  .logo {
    font-size: 1.2rem;
  }
  .page-header h1 {
    font-size: 1.6rem;
  }
  .btn {
    width: 100%;
  }
}