/* ===================================================
   Portfolio Fadix — Chirpy-Inspired Dark Theme
   =================================================== */

/* --- CSS Variables --- */
:root {
  --sidebar-width: 260px;
  --topbar-height: 52px;

  /* Dark theme (default) */
  --bg-primary: #1b1b1e;
  --bg-secondary: #27272a;
  --bg-card: #2c2c30;
  --bg-sidebar: #1e1e21;
  --bg-topbar: #242427;
  --text-primary: #d4d4d8;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #38bdf8;
  --accent-hover: #7dd3fc;
  --border-color: #3f3f46;
  --code-bg: #18181b;
  --success: #22c55e;
  --warning: #eab308;
  --danger: #ef4444;
  --shadow: 0 2px 12px rgba(0,0,0,.4);
}

[data-theme="light"] {
  --bg-primary: #f4f4f5;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-sidebar: #f8f8fa;
  --bg-topbar: #ffffff;
  --text-primary: #27272a;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  --accent: #0284c7;
  --accent-hover: #0369a1;
  --border-color: #e4e4e7;
  --code-bg: #f4f4f5;
  --shadow: 0 2px 12px rgba(0,0,0,.08);
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; }

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  overflow-y: auto;
  transition: transform .3s ease;
}

.sidebar-header {
  text-align: center;
  padding: 2rem 1.25rem 1rem;
}

.avatar-link { display: inline-block; }

.avatar {
  width: 112px;
  height: 112px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border-color);
  transition: border-color .3s;
}
.avatar:hover { border-color: var(--accent); }

.site-title {
  margin-top: .75rem;
  font-size: 1.35rem;
  font-weight: 700;
}
.site-title a { color: var(--text-primary); }
.site-title a:hover { color: var(--accent); }

.site-subtitle {
  font-size: .82rem;
  color: var(--text-muted);
  margin-top: .35rem;
  font-style: italic;
}

/* Nav */
.sidebar-nav { flex: 1; padding: 1rem 0; }

.nav-list { list-style: none; }

.nav-item a {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .6rem 1.5rem;
  color: var(--text-secondary);
  font-size: .92rem;
  font-weight: 400;
  transition: all .2s;
  border-left: 3px solid transparent;
}
.nav-item a:hover,
.nav-item.active a {
  color: var(--accent);
  background: rgba(56,189,248,.06);
  border-left-color: var(--accent);
}
.nav-item a i { width: 20px; text-align: center; font-size: .95rem; }

/* Social */
.sidebar-bottom {
  padding: 1rem 1.25rem 1.5rem;
  border-top: 1px solid var(--border-color);
}
.social-links { display: flex; justify-content: center; gap: 1rem; }
.social-links a {
  color: var(--text-muted);
  font-size: 1.15rem;
  transition: color .2s;
}
.social-links a:hover { color: var(--accent); }

/* Sidebar overlay & mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 999;
}

/* --- Main Wrapper --- */
#main-wrapper {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Top Bar --- */
#topbar-wrapper {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-topbar);
  border-bottom: 1px solid var(--border-color);
}
#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--topbar-height);
  padding: 0 1.25rem;
}
#sidebar-trigger { display: none; }
.btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.15rem;
  cursor: pointer;
  padding: .4rem;
  border-radius: 6px;
  transition: all .2s;
}
.btn:hover { color: var(--accent); background: rgba(56,189,248,.08); }

#breadcrumb {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
}

/* --- Content --- */
#content-wrapper { flex: 1; padding: 1.5rem 2rem; }

.container { max-width: 1150px; margin: 0 auto; }

/* --- Two Column Layout (Chirpy style) --- */
.two-column {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}
.main-col { flex: 1; min-width: 0; }

.right-panel {
  width: 260px;
  min-width: 260px;
  position: sticky;
  top: calc(var(--topbar-height) + 1.5rem);
}

/* --- Card-based post list (Home) --- */
.post-list { display: flex; flex-direction: column; gap: 1rem; }

.card-wrapper { display: block; }

.card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  transition: all .25s;
  box-shadow: var(--shadow);
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(56,189,248,.1);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: .35rem;
  color: var(--text-primary);
}
.card:hover .card-title { color: var(--accent); }

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  font-size: .8rem;
  color: var(--text-muted);
  margin-bottom: .6rem;
}
.card-meta i { margin-right: .25rem; }

.card-text {
  font-size: .9rem;
  color: var(--text-secondary);
  margin-bottom: .6rem;
}

.card-tags { display: flex; flex-wrap: wrap; gap: .4rem; }
.tag {
  display: inline-block;
  font-size: .72rem;
  padding: .15rem .55rem;
  border-radius: 4px;
  background: rgba(56,189,248,.1);
  color: var(--accent);
}

/* --- Category Badges on Cards --- */
.card-cat-badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .75rem;
  padding: .15rem .55rem;
  border-radius: 4px;
  font-weight: 600;
}
.card-cat-badge i { font-size: .7rem; }
.card-cat-badge--tryhackme { background: rgba(34,197,94,.12); color: var(--success); }
.card-cat-badge--hackthebox { background: rgba(156,255,20,.1); color: #9cff14; }
.card-cat-badge--cyber-notes { background: rgba(56,189,248,.1); color: var(--accent); }
.card-cat-badge--linux { background: rgba(234,179,8,.1); color: var(--warning); }
.card-cat-badge--networking { background: rgba(168,85,247,.1); color: #a855f7; }
.card-cat-badge--python-hacking { background: rgba(59,130,246,.1); color: #3b82f6; }

/* --- Card with Image (image on RIGHT like Chirpy) --- */
.card--has-image {
  display: flex;
  flex-direction: row;
  padding: 0;
  overflow: hidden;
}
.card--has-image .card-body {
  padding: 1.25rem 1.5rem;
  flex: 1;
  min-width: 0;
  order: 1;
}
.card-image {
  width: 210px;
  min-width: 210px;
  overflow: hidden;
  order: 2;
}
.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* --- Recently Updated Widget --- */
.recent-list {
  list-style: none;
}
.recent-list li {
  border-bottom: 1px solid var(--border-color);
}
.recent-list li:last-child { border-bottom: none; }
.recent-list a {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .5rem 0;
  color: var(--text-secondary);
  font-size: .82rem;
  transition: color .2s;
}
.recent-list a:hover { color: var(--accent); }
.recent-thumb {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
}
.recent-title { flex: 1; line-height: 1.4; }

/* --- Post Banner Image --- */
.post-banner {
  margin-bottom: 1.5rem;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  max-height: 240px;
}
.post-banner img {
  width: 100%;
  height: 240px;
  display: block;
  object-fit: cover;
}

/* --- Sticky TOC Widget --- */
.toc-widget {
  max-height: calc(100vh - var(--topbar-height) - 6rem);
  overflow-y: auto;
}

/* --- Post content --- */
.post-content { }
.post-header { margin-bottom: 2rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border-color); }
.post-header h1 { font-size: 1.8rem; font-weight: 700; line-height: 1.3; }

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: .5rem;
  font-size: .85rem;
  color: var(--text-muted);
}
.post-meta a { color: var(--text-muted); }
.post-meta a:hover { color: var(--accent); }

.difficulty {
  padding: .15rem .6rem;
  border-radius: 4px;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
}
.difficulty--facile { background: rgba(34,197,94,.15); color: var(--success); }
.difficulty--medium { background: rgba(234,179,8,.15); color: var(--warning); }
.difficulty--hard   { background: rgba(239,68,68,.15); color: var(--danger); }

.post-tags { margin-top: .5rem; display: flex; flex-wrap: wrap; gap: .4rem; }

/* --- Certification Link on Post --- */
.post-certification-link {
  margin-top: .5rem;
}
.post-certification-link a {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .82rem;
  padding: .25rem .7rem;
  border-radius: 6px;
  background: rgba(56,189,248,.1);
  color: var(--accent);
  transition: all .2s;
}
.post-certification-link a:hover {
  background: var(--accent);
  color: #fff;
}

/* TOC */
.toc-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}
.toc-wrapper h3 { font-size: .9rem; color: var(--text-muted); margin-bottom: .5rem; }
.toc-list { list-style: none; }
.toc-entry { padding: .2rem 0; }
.toc-entry a { font-size: .85rem; color: var(--text-secondary); }
.toc-entry a:hover { color: var(--accent); }
.toc-h3 { padding-left: 1rem; }

/* Article content styling */
.content h2 { font-size: 1.35rem; margin: 2rem 0 .75rem; padding-bottom: .35rem; border-bottom: 1px solid var(--border-color); }
.content h3 { font-size: 1.1rem; margin: 1.5rem 0 .5rem; }
.content p { margin-bottom: 1rem; }
.content ul, .content ol { margin: .5rem 0 1rem 1.5rem; }
.content li { margin-bottom: .3rem; }
.content code {
  font-family: 'Fira Code', monospace;
  background: var(--code-bg);
  padding: .15rem .4rem;
  border-radius: 4px;
  font-size: .85rem;
}
.content pre {
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
  position: relative;
}
.content pre code { background: none; padding: 0; }
.content blockquote {
  border-left: 3px solid var(--accent);
  padding: .5rem 1rem;
  margin: 1rem 0;
  background: rgba(56,189,248,.04);
  color: var(--text-secondary);
}
.content img { border-radius: 8px; margin: 1rem 0; max-width: 100%; height: auto; }
.content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}
.content th, .content td {
  border: 1px solid var(--border-color);
  padding: .5rem .75rem;
  text-align: left;
  font-size: .9rem;
}
.content th { background: var(--bg-card); font-weight: 600; }

/* --- Code Copy Button --- */
.code-copy-btn {
  position: absolute;
  top: .5rem;
  right: .5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: .3rem .5rem;
  border-radius: 5px;
  cursor: pointer;
  font-size: .8rem;
  opacity: 0;
  transition: all .2s;
  z-index: 2;
}
.content pre:hover .code-copy-btn { opacity: 1; }
.code-copy-btn:hover { color: var(--accent); border-color: var(--accent); }

/* --- Previous / Next Post Navigation --- */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}
.post-nav-item {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1rem;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: .85rem;
  transition: all .2s;
  max-width: 48%;
}
.post-nav-item:hover { border-color: var(--accent); color: var(--accent); }
.post-nav-item.disabled { visibility: hidden; }
.post-nav-next { margin-left: auto; text-align: right; }

/* --- Back to Top Button --- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  font-size: 1rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: all .3s;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(56,189,248,.3);
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

/* --- Certifications Page --- */
.certifications-page { max-width: 960px; margin: 0 auto; }

.cert-progress-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
.cert-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: .6rem;
}
.cert-progress-label { font-weight: 700; font-size: .95rem; }
.cert-progress-count { font-size: .85rem; color: var(--accent); font-weight: 600; }
.cert-progress-bar {
  width: 100%;
  height: 10px;
  background: var(--bg-primary);
  border-radius: 10px;
  overflow: hidden;
}
.cert-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #a78bfa);
  border-radius: 10px;
  transition: width .8s ease;
}

/* Filters */
.cert-filters {
  display: flex;
  gap: .5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.cert-filter {
  padding: .4rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: .82rem;
  cursor: pointer;
  transition: all .2s;
}
.cert-filter:hover,
.cert-filter.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Cert Grid */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

/* Cert Card (clickable <a> tag) */
a.cert-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.1rem;
  transition: all .25s;
  text-decoration: none;
  color: inherit;
}
a.cert-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(56,189,248,.08);
  border-color: var(--accent);
}

.cert-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: .6rem;
}
.cert-badge { font-size: 1.1rem; }
.cert-number { font-size: .75rem; color: var(--text-muted); font-weight: 600; }

.cert-card-body { flex: 1; }
.cert-title { font-size: 1rem; font-weight: 700; margin-bottom: .25rem; color: var(--text-primary); }
a.cert-card:hover .cert-title { color: var(--accent); }
.cert-provider { font-size: .8rem; color: var(--accent); margin-bottom: .35rem; }
.cert-desc { font-size: .82rem; color: var(--text-muted); line-height: 1.5; }

.cert-card-footer {
  margin-top: .75rem;
  padding-top: .5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.cert-status-text { font-size: .78rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: .5px; }
.cert-note-count { font-size: .75rem; color: var(--accent); }
.cert-note-count i { margin-right: .2rem; }

/* --- Certification Detail Page --- */
.cert-detail-page { max-width: 800px; margin: 0 auto; }

.cert-detail-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.cert-badge-lg { font-size: 2rem; }

.cert-detail-header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: .25rem;
}
.cert-detail-provider {
  font-size: .9rem;
  color: var(--text-muted);
  margin-bottom: .5rem;
}
.cert-detail-provider i { margin-right: .3rem; }

.cert-status-pill {
  display: inline-block;
  padding: .25rem .75rem;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.cert-status-pill--completed { background: rgba(34,197,94,.15); color: var(--success); }
.cert-status-pill--in-progress { background: rgba(234,179,8,.15); color: var(--warning); }
.cert-status-pill--not-started { background: rgba(239,68,68,.15); color: var(--danger); }

.cert-detail-desc {
  font-size: .95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.cert-notes-section h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.cert-notes-section h2 i { color: var(--accent); }

.cert-notes-list {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.cert-note-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  transition: all .25s;
  text-decoration: none;
  color: inherit;
}
.cert-note-card:hover {
  border-color: var(--accent);
  transform: translateX(4px);
  box-shadow: 0 4px 16px rgba(56,189,248,.08);
}

.cert-note-icon {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: rgba(56,189,248,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.cert-note-icon i { color: var(--accent); font-size: 1.1rem; }

.cert-note-info { flex: 1; min-width: 0; }
.cert-note-info h3 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: .2rem;
}
.cert-note-card:hover .cert-note-info h3 { color: var(--accent); }
.cert-note-meta {
  display: flex;
  gap: .75rem;
  font-size: .78rem;
  color: var(--text-muted);
  margin-bottom: .2rem;
}
.cert-note-info p {
  font-size: .82rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.cert-note-arrow {
  color: var(--text-muted);
  transition: all .2s;
}
.cert-note-card:hover .cert-note-arrow { color: var(--accent); transform: translateX(3px); }

.cert-notes-empty {
  text-align: center;
  padding: 2.5rem 1rem;
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  color: var(--text-muted);
}
.cert-notes-empty i { font-size: 2rem; margin-bottom: .75rem; display: block; }
.cert-notes-empty p { margin-bottom: .3rem; }
.cert-notes-hint { font-size: .82rem; }
.cert-notes-hint a { color: var(--accent); }

.cert-detail-back {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}
.cert-detail-back a {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .9rem;
  color: var(--text-muted);
  transition: color .2s;
}
.cert-detail-back a:hover { color: var(--accent); }

/* --- Categories & Tags Pages --- */
.taxonomy-section { margin-bottom: 2.5rem; }
.taxonomy-section h2 {
  font-size: 1.15rem;
  margin-bottom: .75rem;
  padding-bottom: .35rem;
  border-bottom: 1px solid var(--border-color);
}
.taxonomy-list { list-style: none; }
.taxonomy-list li {
  padding: .5rem 0;
  display: flex;
  align-items: center;
  gap: .6rem;
  border-bottom: 1px solid var(--border-color);
}
.taxonomy-list li:last-child { border-bottom: none; }
.taxonomy-list a { color: var(--text-secondary); font-size: .9rem; flex: 1; }
.taxonomy-list a:hover { color: var(--accent); }
.taxonomy-list .date { color: var(--text-muted); font-size: .8rem; white-space: nowrap; }

/* Tag Cloud / Trending */
.widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.1rem;
  margin-bottom: 1.25rem;
}
.widget-title {
  font-size: .92rem;
  font-weight: 700;
  margin-bottom: .75rem;
  color: var(--text-primary);
}
.widget-title i { color: var(--danger); margin-right: .35rem; }

.tag-cloud { display: flex; flex-wrap: wrap; gap: .4rem; }
.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .25rem .65rem;
  border-radius: 20px;
  background: rgba(56,189,248,.08);
  color: var(--accent);
  font-size: .78rem;
  transition: all .2s;
}
.tag-pill:hover { background: var(--accent); color: #fff; }
.tag-count {
  font-size: .68rem;
  background: rgba(0,0,0,.2);
  padding: .1rem .35rem;
  border-radius: 10px;
}

/* --- Archives --- */
.archive-year { margin-bottom: 2rem; }
.archive-year h2 { font-size: 1.25rem; color: var(--accent); }
.archive-list { list-style: none; }
.archive-list li {
  display: flex;
  gap: 1rem;
  padding: .4rem 0;
  border-bottom: 1px solid var(--border-color);
}
.archive-list .date { color: var(--text-muted); font-size: .82rem; min-width: 80px; }
.archive-list a { font-size: .92rem; }

/* --- Footer --- */
.site-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: .8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  margin-top: 2rem;
}

/* --- Page Content --- */
.page-content { margin: 0; }
.two-column .page-content { max-width: none; }
.page-title { font-size: 1.6rem; margin-bottom: 1.25rem; }

/* --- Responsive --- */
@media (max-width: 1100px) {
  .right-panel { width: 220px; min-width: 220px; }
}

@media (max-width: 849px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.active { display: block; }
  #sidebar-trigger { display: block; }
  #main-wrapper { margin-left: 0; }
  .two-column { flex-direction: column; }
  .right-panel { width: 100%; min-width: 100%; position: static; }
  #content-wrapper { padding: 1rem; }
  .cert-detail-header { flex-direction: column; }
}

@media (max-width: 576px) {
  #content-wrapper { padding: .75rem; }
  .cert-grid { grid-template-columns: 1fr; }
  .card { padding: 1rem; }
  .card--has-image { flex-direction: column; }
  .card-image { width: 100%; min-width: 100%; height: 180px; order: 1; }
  .card--has-image .card-body { order: 2; }
  .post-nav { flex-direction: column; }
  .post-nav-item { max-width: 100%; }
}