/* 
 * GeoPatterns Modernization CSS
 * Clean, academic, inheriting main site aesthetics with subtle modern touches.
 */

:root {
  --gd-gp-accent: #000000; /* Inherits main blue */
  --gd-gp-accent-hover: #000000;
  --gd-gp-bg: #f8f9fa;
  --gd-gp-surface: #ffffff;
  --gd-gp-text: #212529;
  --gd-gp-text-muted: #6c757d;
  --gd-gp-border: #dee2e6;
  --gd-gp-shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
  --gd-gp-shadow-hover: 0 10px 20px rgba(0,0,0,0.08);
}

/* Hero Section */
.gd-gp-hero {
  background: linear-gradient(135deg, #000000 0%, #202020 100%);
  color: white;
  padding: 4rem 0;
  margin-bottom: 3rem;
  position: relative;
  overflow: hidden;
}

.gd-gp-hero::after {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background: radial-gradient(circle at top right, rgba(255,255,255,0.1), transparent 50%);
  pointer-events: none;
}

.gd-gp-hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: white;
  letter-spacing: -0.02em;
}

.gd-gp-hero p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0;
}

/* Layout Grid */
.gd-gp-layout {
  font-family: var(--wp--preset--font-family--system-font, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol");
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
  max-width: 1200px;
  margin: 0 auto;
  padding: 3rem 1rem;
}

@media (max-width: 991px) {
  .gd-gp-layout {
    grid-template-columns: 1fr;
  }
}

/* Modernized Sidebar Navigation */
.gd-gp-sidebar {
  position: sticky;
  top: 2rem;
  background: var(--gd-gp-surface);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--gd-gp-shadow-sm);
  border: 1px solid var(--gd-gp-border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gd-gp-sidebar:hover {
  box-shadow: var(--gd-gp-shadow-hover);
}

.gd-gp-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.gd-gp-nav-item {
  display: block;
}

.gd-gp-nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--gd-gp-text);
  text-decoration: none;
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.gd-gp-nav-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gd-gp-accent);
  transform: scaleY(0);
  transition: transform 0.2s ease;
  transform-origin: center;
}

.gd-gp-nav-link:hover, .gd-gp-nav-link:focus {
  background: rgba(0, 0, 0, 0.05);
  color: var(--gd-gp-accent);
  padding-left: 1.25rem;
}

.gd-gp-nav-link.active {
  background: rgba(0, 0, 0, 0.08);
  color: var(--gd-gp-accent);
  font-weight: 600;
}

.gd-gp-nav-link.active::before {
  transform: scaleY(1);
}

.gd-gp-nav-sub {
  margin-left: 1.5rem;
  font-size: 0.9em;
  padding: 0.5rem 1rem;
  color: var(--gd-gp-text-muted);
}

/* Content Area */
.gd-gp-content {
  background: var(--gd-gp-surface);
  border-radius: 12px;
  padding: 2.5rem;
  box-shadow: var(--gd-gp-shadow-sm);
  border: 1px solid var(--gd-gp-border);
}

.gd-gp-content h2 {
  font-size: 1.8rem;
  color: var(--gd-gp-text);
  margin-top: 0;
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--gd-gp-border);
}

.gd-gp-content p {
  color: var(--gd-gp-text);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.gd-gp-content ul {
    padding-left: 0;
    margin-bottom: 1.5rem;
    list-style: none;
  }

.gd-gp-content li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
    position: relative;
    padding-left: 1.5rem;
    list-style: none;
  }
  .gd-gp-content li::before {
    content: '\2192';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--gd-gp-accent, #000000);
    font-weight: 700;
  }

/* Specialized Components */
.gd-gp-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: white; color: var(--gd-ocean); border: 2px solid var(--gd-ocean);
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
  margin-bottom: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.gd-gp-download-btn:hover {
  background: var(--gd-ocean); transform: translateY(-2px); box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3); color: white;
}

.gd-gp-staff-list {
  list-style: none;
  padding: 0;
}

.gd-gp-staff-list li {
  padding: 1rem 0;
  border-bottom: 1px solid var(--gd-gp-border);
}

.gd-gp-staff-list li:last-child {
  border-bottom: none;
}

.gd-gp-staff-role {
  font-weight: 600;
  color: var(--gd-gp-accent);
  display: block;
  margin-bottom: 0.25rem;
}

.gd-gp-staff-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gd-gp-text);
}

.gd-gp-staff-org {
  color: var(--gd-gp-text-muted);
  font-size: 0.95rem;
  margin-top: 0.25rem;
}

.gd-gp-volumes-list {
  display: grid;
  gap: 1rem;
}

.gd-gp-volume-card {
  display: block;
  padding: 1.25rem;
  background: var(--gd-gp-bg);
  border: 1px solid var(--gd-gp-border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--gd-gp-text);
  transition: all 0.2s ease;
}

.gd-gp-volume-card:hover {
  background: var(--gd-gp-surface);
  border-color: var(--gd-gp-accent);
  transform: translateX(5px);
  box-shadow: var(--gd-gp-shadow-sm);
}

.gd-gp-volume-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--gd-gp-accent);
  margin-bottom: 0.25rem;
}

.gd-gp-volume-meta {
  font-size: 0.9rem;
  color: var(--gd-gp-text-muted);
}


/* Subtitles match courses page */
.gd-gp-content h2 {
    border-bottom: 3px solid var(--gd-terracotta);
    padding-bottom: 0.35rem;
    margin-bottom: 1.5rem;
    width: max-content;
    max-width: 100%;
    color: var(--gd-ink);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.gd-gp-content h3 {
    border-bottom: 2px solid rgba(var(--gd-terracotta-rgb, 185, 28, 28), 0.35);
    padding-bottom: 0.25rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    width: max-content;
    max-width: 100%;
    color: var(--gd-ink);
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ── Definition list (Author Guidelines) ── */
.gd-gp-definition-list {
    margin: 0 0 1.5rem;
    padding: 0;
}

.gd-gp-definition-list dt {
    font-weight: 700;
    color: var(--gd-ink);
    margin-top: 1.25rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.gd-gp-definition-list dd {
    margin: 0.35rem 0 0 0;
    padding: 0 0 1rem 1rem;
    border-left: 3px solid var(--gd-gp-border);
    color: var(--gd-slate, #3a3a3a);
    line-height: 1.75;
}

/* ── Volumes list ── */
.gd-gp-volumes {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.gd-gp-volume-group {
    border-top: 1px solid var(--gd-gp-border);
    padding: 1.25rem 0;
}

.gd-gp-volume-group:last-child {
    border-bottom: 1px solid var(--gd-gp-border);
}

.gd-gp-volume-group h3 {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gd-terracotta, #b91c1c);
    margin: 0 0 0.75rem;
    padding: 0;
    border: none;
    width: auto;
}

.gd-gp-issue-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.4rem 0;
}

.gd-gp-issue-label {
    font-size: 0.97rem;
    color: var(--gd-ink);
    font-weight: 500;
}

.gd-gp-issue-actions {
    display: flex;
    gap: 0.75rem;
    flex-shrink: 0;
}

.gd-gp-issue-link {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gd-gp-accent);
    text-decoration: none;
    padding: 0.3rem 0.75rem;
    border: 1px solid var(--gd-gp-accent);
    border-radius: 4px;
    transition: background 0.18s ease, color 0.18s ease;
    white-space: nowrap;
}

.gd-gp-issue-link:hover {
    background: var(--gd-gp-accent);
    color: #fff;
}

.gd-gp-issue-link--pdf {
    color: var(--gd-terracotta, #b91c1c);
    border-color: var(--gd-terracotta, #b91c1c);
}

.gd-gp-issue-link--pdf:hover {
    background: var(--gd-terracotta, #b91c1c);
    color: #fff;
}

@media (max-width: 600px) {
    .gd-gp-issue-row {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ── Indexing list ── */
.gd-gp-index-list {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.gd-gp-index-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--gd-gp-border);
}

.gd-gp-index-item:first-child {
    border-top: 1px solid var(--gd-gp-border);
}

.gd-gp-index-name {
    font-weight: 600;
    color: var(--gd-ink);
    font-size: 0.97rem;
}

.gd-gp-index-link {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gd-gp-accent);
    text-decoration: none;
    white-space: nowrap;
    transition: color 0.18s ease;
}

.gd-gp-index-link:hover {
    color: var(--gd-gp-accent-hover);
    text-decoration: underline;
}

@media (max-width: 600px) {
    .gd-gp-index-item {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ── Submission steps ── */
.gd-gp-steps {
    padding-left: 1.25rem;
    margin: 1.25rem 0 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.gd-gp-steps li {
    padding: 0.9rem 1.1rem;
    background: var(--gd-gp-bg);
    border-left: 3px solid var(--gd-gp-accent);
    border-radius: 0 6px 6px 0;
    line-height: 1.65;
    color: var(--gd-ink);
}

.gd-gp-steps li strong {
    display: block;
    margin-bottom: 0.3rem;
    font-size: 0.95rem;
    color: var(--gd-gp-accent);
}

/* ── Contact card ── */
.gd-gp-contact-card {
    background: var(--gd-gp-bg);
    border: 1px solid var(--gd-gp-border);
    border-left: 4px solid var(--gd-gp-accent);
    border-radius: 0 8px 8px 0;
    padding: 1.5rem 1.75rem;
    margin-top: 1.5rem;
    line-height: 1.65;
}

.gd-gp-contact-role {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gd-gp-text-muted);
    margin: 0 0 0.35rem;
}

.gd-gp-contact-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--gd-ink);
    margin: 0 0 0.25rem;
}

.gd-gp-contact-affil {
    color: var(--gd-slate, #3a3a3a);
    margin: 0 0 0.5rem;
    font-size: 0.95rem;
}

.gd-gp-contact-email {
    margin: 0;
}

.gd-gp-contact-email a {
    color: var(--gd-gp-accent);
    font-weight: 600;
    text-decoration: none;
}

.gd-gp-contact-email a:hover {
    text-decoration: underline;
}

/* ── Improved Sidebar Navigation ── */
.gd-gp-nav {
    gap: 0.1rem;
}

.gd-gp-nav-item {
    display: block;
}

.gd-gp-nav-item + .gd-gp-nav-item:not(.gd-gp-nav-sub) {
    margin-top: 0.1rem;
}

/* Separator before certain groups */
.gd-gp-nav-item:nth-child(4),
.gd-gp-nav-item:nth-child(7) {
    border-top: 1px solid var(--gd-gp-border);
    margin-top: 0.6rem;
    padding-top: 0.5rem;
}

.gd-gp-nav-sub .gd-gp-nav-link {
    padding-left: 2rem;
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--gd-gp-text-muted);
}

.gd-gp-nav-sub .gd-gp-nav-link::before {
    display: none;
}

.gd-gp-nav-sub .gd-gp-nav-link:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--gd-gp-accent);
    padding-left: 2.25rem;
}

/* Individual Issue View */
  .gd-gp-issue-meta { color: var(--gd-gp-text-muted); margin-bottom: 2.5rem; font-size: 1rem; font-weight: 500; }
  .gd-gp-issue-header { display: flex; justify-content: space-between; align-items: center; border-bottom: 2px solid var(--gd-gp-border); padding-bottom: 1.25rem; margin-bottom: 3rem; flex-wrap: wrap; gap: 1rem; }
  .gd-gp-issue-header h3 { margin: 0; font-size: 1.5rem; border: none; color: var(--gd-ink); font-weight: 700; letter-spacing: -0.01em; }
  
  /* Premium Article Cards */
  .gd-gp-article { 
      background: var(--gd-gp-surface, #ffffff);
      border-radius: 12px;
      padding: 2rem;
      margin-bottom: 2rem;
      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.03), 0 1px 3px rgba(0, 0, 0, 0.05);
      border: 1px solid rgba(0, 0, 0, 0.04);
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
      overflow: hidden;
  }
  .gd-gp-article::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; height: 3px;
      background: linear-gradient(90deg, var(--gd-terracotta, #b91c1c), var(--gd-gp-accent, #000000));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.4s ease;
  }
  .gd-gp-article:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.06), 0 4px 8px rgba(0, 0, 0, 0.04);
  }
  .gd-gp-article:hover::before {
      transform: scaleX(1);
  }
  
  .gd-gp-article h3 { 
      margin: 0 0 0.75rem 0; 
      font-size: 1.25rem; 
      line-height: 1.5; 
      border-bottom: none; 
      padding-bottom: 0; 
      width: auto; 
      max-width: none; 
      text-transform: none; 
      color: var(--gd-ink, #000000); 
      font-weight: 700; 
      letter-spacing: -0.01em; 
  }
  .gd-gp-article h3 a { 
      color: var(--gd-ink, #000000); 
      text-decoration: none; 
      transition: color 0.2s ease; 
  }
  .gd-gp-article h3 a:hover { 
      color: var(--gd-gp-accent, #000000); 
  }
  
  .gd-gp-article-author { 
      color: var(--gd-terracotta, #b91c1c); 
      font-weight: 700; 
      margin-bottom: 1.25rem; 
      font-size: 0.85rem; 
      text-transform: uppercase; 
      letter-spacing: 0.05em; 
      display: inline-block;
      background: rgba(185, 28, 28, 0.05);
      padding: 0.4rem 0.8rem;
      border-radius: 6px;
  }
  
  .gd-gp-article-abstract { 
      margin-bottom: 1.5rem; 
      font-size: 0.95rem; 
      line-height: 1.7; 
      color: var(--gd-slate, #3a3a3a); 
  }
  
  .gd-gp-article-keywords { 
      margin-bottom: 1.5rem; 
      font-size: 0.85rem; 
      color: var(--gd-gp-text-muted); 
      display: block;
  }
  .gd-gp-article-keywords em {
      font-style: normal;
      background: #f1f5f9;
      color: #3a3a3a;
      padding: 0.3rem 0.75rem;
      border-radius: 20px;
      font-weight: 500;
      letter-spacing: 0.01em;
  }
  
  .gd-gp-article-link { 
      display: inline-flex; 
      align-items: center;
      gap: 0.4rem;
      font-size: 0.9rem; 
      font-weight: 600; 
      color: var(--gd-gp-accent); 
      text-decoration: none; 
      padding: 0.5rem 1rem;
      border: 1px solid rgba(0, 0, 0, 0.2);
      border-radius: 6px;
      transition: all 0.2s ease;
  }
  .gd-gp-article-link:hover { 
      background: white; color: var(--gd-ocean); border: 2px solid var(--gd-ocean);
      border-color: var(--gd-gp-accent);
      text-decoration: none;
  }
  .gd-gp-article-link::after, .gd-action-link::after, .gd-action-button::after, .gd-gp-download-btn::after {
      content: '\2192';
      transition: transform 0.2s ease;
      display: inline-block;
      margin-left: 0.2rem;
  }
  .gd-gp-article-link:hover::after, .gd-action-link:hover::after, .gd-action-button:hover::after, .gd-gp-download-btn:hover::after {
      transform: translateX(4px);
  }