/* ── PAGE HERO ── */
.page-hero {
  background: linear-gradient(135deg, var(--navy) 0%, #1e4d7b 50%, #2d6a9f 100%);
  padding: 52px 5% 56px; position: relative; overflow: hidden;
}
.page-hero::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 80% 50%, rgba(168,212,240,.1) 0%, transparent 60%); }
.breadcrumb { display: flex; align-items: center; gap: 8px; margin-bottom: 18px; font-size: 12.5px; }
.breadcrumb a { color: rgba(168,212,240,.7); text-decoration: none; }
.breadcrumb a:hover { color: var(--sky); }
.breadcrumb span { color: rgba(168,212,240,.4); }
.breadcrumb strong { color: var(--sky); }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 7px; background: rgba(76,175,125,.18); border: 1px solid rgba(76,175,125,.4); color: #7edba8; padding: 5px 14px; border-radius: 30px; font-size: 11.5px; font-weight: 600; letter-spacing: .6px; text-transform: uppercase; margin-bottom: 16px; }
.page-hero h1 { font-family: 'Playfair Display',serif; font-size: clamp(28px,4vw,44px); color: var(--white); font-weight: 700; margin-bottom: 14px; }
.page-hero p { color: rgba(168,212,240,.82); max-width: 560px; font-size: 15px; line-height: 1.7; }
.hero-stats { display: flex; gap: 32px; margin-top: 28px; flex-wrap: wrap; }
.hero-stat { text-align: left; }
.hero-stat-num { font-family: 'Space Grotesk',sans-serif; font-size: 26px; font-weight: 700; color: var(--sky); line-height: 1; }
.hero-stat-num sup { font-size: 14px; color: var(--teal); }
.hero-stat-label { font-size: 11px; color: rgba(168,212,240,.6); text-transform: uppercase; letter-spacing: .5px; margin-top: 3px; }

/* ── MAIN LAYOUT ── */
.main-layout { display: grid; grid-template-columns: 240px 1fr; gap: 32px; max-width: 1200px; margin: 0 auto; padding: 40px 5% 64px; align-items: start; }

/* ── SIDEBAR ── */
.sidebar { position: sticky; top: 84px; }
.sidebar-card { background: var(--white); border-radius: 14px; border: 1.5px solid var(--border); overflow: hidden; margin-bottom: 16px; }
.sidebar-header { background: var(--navy); padding: 14px 18px; font-family: 'Space Grotesk',sans-serif; font-size: 12px; font-weight: 600; color: var(--sky); letter-spacing: .8px; text-transform: uppercase; }
.year-nav { padding: 8px 0; }
.year-nav-item { border-bottom: 1px solid var(--border); }
.year-nav-item:last-child { border-bottom: none; }
.year-btn {
  width: 100%; background: none; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between;
  padding: 11px 18px; font-family: 'Space Grotesk',sans-serif;
  font-size: 14px; font-weight: 600; color: var(--navy);
  transition: background .15s;
}
.year-btn:hover { background: var(--bg); }
.year-btn.active { color: var(--blue); background: var(--bg); }
.year-btn .yr-badge { font-size: 10.5px; font-weight: 500; background: var(--bg); color: var(--muted); padding: 2px 8px; border-radius: 10px; }
.year-btn.active .yr-badge { background: #e8f0fb; color: var(--blue); }
.vol-links { background: var(--bgsoft); }
.vol-link {
  display: flex; align-items: center; gap: 9px;
  padding: 9px 18px 9px 28px; text-decoration: none;
  font-size: 12.5px; color: var(--muted); transition: all .15s;
  border-left: 3px solid transparent;
}
.vol-link:hover { color: var(--blue); background: var(--bg); }
.vol-link.active { color: var(--blue); font-weight: 600; border-left-color: var(--blue); background: var(--bg); }
.vol-link .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--border); flex-shrink: 0; }
.vol-link.active .dot, .vol-link:hover .dot { background: var(--blue); }
.vol-link .current-tag { font-size: 9.5px; background: var(--teal); color: var(--white); padding: 1px 6px; border-radius: 8px; font-weight: 600; margin-left: auto; }
.sidebar-cta { background: linear-gradient(135deg, var(--navy), #2d6a9f); border-radius: 14px; padding: 22px 20px; text-align: center; }
.sidebar-cta h4 { font-family: 'Space Grotesk',sans-serif; font-size: 14px; font-weight: 600; color: var(--white); margin-bottom: 8px; }
.sidebar-cta p { font-size: 12px; color: rgba(168,212,240,.75); margin-bottom: 14px; line-height: 1.55; }
.sidebar-cta .btn-teal { width: 100%; text-align: center; display: block; font-size: 13px; padding: 10px; background: #4caf7d;
    color: #fff; }

/* ── CONTENT ── */
.content-area { min-width: 0; }

/* Filter bar */
.filter-bar {
  background: var(--white); border-radius: 12px; border: 1.5px solid var(--border);
  padding: 14px 18px; display: flex; align-items: center; gap: 12px;
  margin-bottom: 24px; flex-wrap: wrap;
}
.filter-label { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .6px; flex-shrink: 0; }
.filter-chips { display: flex; gap: 8px; flex-wrap: wrap; flex: 1; }
.chip {
  padding: 5px 14px; border-radius: 20px; font-size: 12.5px; font-weight: 500;
  cursor: pointer; border: 1.5px solid var(--border); background: var(--bgsoft);
  color: var(--muted); transition: all .18s;
}
.chip:hover { border-color: var(--blue); color: var(--blue); }
.chip.active { background: var(--blue); border-color: var(--blue); color: var(--white); }
.search-mini { display: flex; gap: 0; background: var(--bgsoft); border-radius: 8px; border: 1.5px solid var(--border); overflow: hidden; margin-left: auto; }
.search-mini input { border: none; background: transparent; padding: 7px 12px; font-size: 13px; outline: none; font-family: 'Inter',sans-serif; width: 180px; color: var(--text); }
.search-mini input::placeholder { color: var(--muted); }
.search-mini button { background: var(--blue); border: none; color: var(--white); padding: 7px 12px; cursor: pointer; font-size: 13px; }

/* Volume block */
.volume-block { margin-bottom: 40px; scroll-margin-top: 90px; }
.volume-header {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 16px;
}
.volume-badge {
  background: var(--navy); color: var(--white);
  font-family: 'Space Grotesk',sans-serif; font-size: 11px; font-weight: 600;
  padding: 6px 14px; border-radius: 30px; letter-spacing: .5px; flex-shrink: 0;
}
.volume-badge.current { background: var(--teal); }
.volume-title-group h2 { font-family: 'Space Grotesk',sans-serif; font-size: 18px; font-weight: 700; color: var(--navy); }
.volume-meta { display: flex; gap: 16px; margin-top: 4px; font-size: 12px; color: var(--muted); flex-wrap: wrap; }
.volume-meta span { display: flex; align-items: center; gap: 5px; }
.volume-divider { flex: 1; height: 1px; background: var(--border); }

/* Article cards */
.articles-list { display: flex; flex-direction: column; gap: 12px; }
.article-card {
  background: var(--white); border-radius: 12px; border: 1.5px solid var(--border);
  padding: 0; overflow: hidden; transition: all .2s;
  display: flex; flex-direction: column;
}
.article-card:hover { border-color: var(--blue); box-shadow: 0 4px 20px rgba(45,106,159,.1); }
.article-card-inner { padding: 15px 16px 12px; flex: 1; }
.article-top { display: flex; align-items: flex-start; gap: 14px; }
.article-number {
  flex-shrink: 0; width: 32px; height: 32px; border-radius: 7px;
  background: var(--bg); display: flex; align-items: center; justify-content: center;
  font-family: 'Space Grotesk',sans-serif; font-size: 11.5px; font-weight: 700; color: var(--blue);
  margin-top: 2px;
}
.article-body { flex: 1; min-width: 0; }
.article-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 7px; }
.tag {
  font-size: 10px; font-weight: 600; padding: 2px 8px; border-radius: 4px;
  text-transform: uppercase; letter-spacing: .4px;
}
.tag-bio    { background: #e7f5ef; color: #2d7a55; }
.tag-agri   { background: #f0f7e0; color: #5a8c2a; }
.tag-food   { background: #fff3e0; color: #b76e00; }
.tag-med    { background: #fce4ec; color: #a0254d; }
.tag-env    { background: #e0f7fa; color: #006978; }
.tag-chem   { background: #e8f0fb; color: var(--blue); }
.tag-soc    { background: #f3e5f5; color: #6a1b9a; }
.tag-tech   { background: #e8eaf6; color: #283593; }
.article-title {
    font-weight: 600;
    font-size: 16px;
    color: var(--navy);
    line-height: 1.48;
    margin-bottom: 8px;
    text-transform: capitalize;
    padding-top: 7px;
}
.article-authors { font-size: 12.5px; color: var(--muted); margin-bottom: 6px; }
.article-authors strong { color: #4a6b80; }
.article-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 20px; border-top: 1px solid var(--border);
  background: var(--bgsoft); flex-wrap: wrap; gap: 8px;
}
.article-meta-row { display: flex; gap: 16px; flex-wrap: wrap; }
.article-meta-item { font-size: 11.5px; color: var(--muted); display: flex; align-items: center; gap: 4px; }
.article-actions { display: flex; gap: 8px; }
.btn-icon {
  display: flex; align-items: center; gap: 5px;
  padding: 5px 12px; border-radius: 6px; font-size: 12px; font-weight: 600;
  text-decoration: none; transition: all .18s; border: 1.5px solid;
}
.btn-view { color: var(--blue); border-color: var(--border); background: var(--white); }
.btn-view:hover { border-color: var(--blue); background: var(--bg); }
.btn-pdf { color: var(--white); border-color: var(--teal); background: var(--teal); }
.btn-pdf:hover { background: #3d9a6b; border-color: #3d9a6b; }
.doi-chip { font-size: 10.5px; color: var(--muted); font-family: monospace; background: var(--bg); padding: 2px 8px; border-radius: 4px; }

/* Abstract toggle */
.abstract-toggle { 
  background: none; border: none; cursor: pointer; 
  font-size: 12px; color: var(--blue); font-weight: 500; 
  display: flex; align-items: center; gap: 4px; padding: 0;
  font-family: 'Inter', sans-serif; margin-top: 6px;
}
.abstract-toggle:hover { color: var(--navy); }
.abstract-body {
  display: none; margin-top: 10px; padding: 12px 14px;
  background: var(--bgsoft); border-radius: 8px; border-left: 3px solid var(--sky);
  font-size: 13px; color: #3a5268; line-height: 1.7;
}
.abstract-body.open { display: block; }

/* Year divider */
.year-divider {
  display: flex; align-items: center; gap: 16px; margin: 40px 0 24px;
  scroll-margin-top: 90px;
}
.year-label {
  font-family: 'Playfair Display',serif; font-size: 28px; font-weight: 700;
  color: var(--navy); flex-shrink: 0;
}
.year-line { flex: 1; height: 2px; background: linear-gradient(90deg, var(--border), transparent); }
.year-count { font-size: 12px; color: var(--muted); background: var(--bg); padding: 4px 12px; border-radius: 20px; flex-shrink: 0; }

.float-end{
  float: right;
}