:root {
  --bg-primary: #f6f7fb;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-link: #2563eb;
  --text-link-hover: #1d4ed8;
  --border-color: #e2e8f0;
  --code-bg: #f1f5f9;
  --code-border: #e2e8f0;
}

html[data-theme="black"] {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #1f232d;
  --text-primary: #e6edf3;
  --text-secondary: #9aa4b2;
  --text-link: #58a6ff;
  --text-link-hover: #79c0ff;
  --border-color: #2b2f3a;
  --code-bg: #161b22;
  --code-border: #2b2f3a;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  line-height: 1.6;
  font-size: 16px;
}

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

.container {
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 3rem;
}

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
}

.topbar {
  background-color: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 10;
}

html[data-theme="black"] .topbar {
  background-color: rgba(11, 11, 13, 0.95);
}

html[data-theme="black"] .gallery-header h1 {
  color: #9fef00;
}

html[data-theme="black"] .gallery-description {
  color: var(--text-secondary);
}

html[data-theme="black"] .multi-filter-section {
  background-color: var(--bg-secondary);
  border-color: #2a2e3d;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.45);
}

html[data-theme="black"] .filter-category-label {
  color: var(--text-link);
}

html[data-theme="black"] .filter-results {
  border-top-color: #2a2e3d;
}

html[data-theme="black"] .writeup-card {
  background-color: var(--bg-secondary);
  border-color: #2a2e3d;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.35);
}

html[data-theme="black"] .writeup-card:hover {
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.5);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 14px;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background-color: var(--text-link);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}

.nav-links {
  display: flex;
  gap: 20px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background: var(--bg-tertiary);
}

.theme-toggle button {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-toggle button.active {
  background: var(--text-link);
  color: #ffffff;
}

html[data-theme="black"] .theme-toggle button.active {
  color: #0b0b0d;
}

.nav-links a {
  color: var(--text-secondary);
}

.nav-links a.active,
.nav-links a:hover {
  color: var(--text-primary);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.theme-btn {
  background: transparent;
}

.site-header .brand {
  font-size: 14px;
}

.site-header .nav-links {
  font-size: 12px;
}

.page {
  max-width: 1600px;
  margin: 0 auto;
  padding: 2rem 3rem;
}

@media (max-width: 768px) {
  .page {
    padding: 1.5rem 1rem;
  }
}

/* Writeup Gallery Styles */
.writeup-gallery-page {
  max-width: 1600px;
  margin: 0 auto;
  padding: 2rem 0;
}

.gallery-header {
  text-align: center;
  margin-bottom: 3rem;
}

.gallery-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.gallery-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
}

/* Multi-Category Filter Styles */
.multi-filter-section {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.filter-category {
  margin-bottom: 1.5rem;
}

.filter-category:last-of-type {
  margin-bottom: 1rem;
}

.filter-category-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-link);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  border: 1px solid transparent;
  background: transparent;
}

.filter-btn:hover {
  transform: translateY(-2px);
  opacity: 0.85;
}

.filter-all {
  background-color: rgba(88, 166, 255, 0.15);
  color: #58a6ff;
  border: 1px solid #58a6ff;
}

.filter-all.active {
  background-color: #58a6ff;
  color: #ffffff;
}

.filter-easy {
  background-color: rgba(40, 167, 69, 0.2);
  color: #28a745;
  border: 1px solid #28a745;
}

.filter-easy.active {
  background-color: #28a745;
  color: #ffffff;
}

.filter-medium {
  background-color: rgba(253, 126, 20, 0.2);
  color: #fd7e14;
  border: 1px solid #fd7e14;
}

.filter-medium.active {
  background-color: #fd7e14;
  color: #ffffff;
}

.filter-hard {
  background-color: rgba(220, 53, 69, 0.2);
  color: #dc3545;
  border: 1px solid #dc3545;
}

.filter-hard.active {
  background-color: #dc3545;
  color: #ffffff;
}

.filter-insane {
  background: linear-gradient(135deg, rgba(192, 192, 192, 0.25), rgba(169, 169, 169, 0.25));
  color: #c0c0c0;
  border: 1px solid #a9a9a9;
  box-shadow: 0 0 8px rgba(192, 192, 192, 0.3);
}

.filter-insane.active {
  background: linear-gradient(135deg, #c0c0c0, #a9a9a9);
  color: #1f2937;
  box-shadow: 0 0 12px rgba(192, 192, 192, 0.5);
}

.filter-platform-hackthebox {
  background-color: rgba(159, 239, 0, 0.15);
  color: #9fef00;
  border: 1px solid #9fef00;
}

.filter-platform-hackthebox.active {
  background-color: #9fef00;
  color: #1f2937;
}

.filter-platform-tryhackme {
  background-color: rgba(33, 44, 66, 0.4);
  color: #88cc14;
  border: 1px solid #88cc14;
}

.filter-platform-tryhackme.active {
  background-color: #88cc14;
  color: #ffffff;
}

.filter-platform-proving-grounds {
  background-color: rgba(147, 51, 234, 0.2);
  color: #a855f7;
  border: 1px solid #a855f7;
}

.filter-platform-proving-grounds.active {
  background-color: #a855f7;
  color: #ffffff;
}

.filter-platform-btlo {
  background-color: rgba(56, 189, 248, 0.18);
  color: #38bdf8;
  border: 1px solid #38bdf8;
}

.filter-platform-btlo.active {
  background-color: #38bdf8;
  color: #0b1220;
}

.filter-platform-pwnable {
  background-color: rgba(88, 166, 255, 0.15);
  color: #58a6ff;
  border: 1px solid #58a6ff;
}

.filter-platform-pwnable.active {
  background-color: #58a6ff;
  color: #ffffff;
}

.filter-platform-picoctf {
  background-color: rgba(255, 123, 114, 0.15);
  color: #ff7b72;
  border: 1px solid #ff7b72;
}

.filter-platform-picoctf.active {
  background-color: #ff7b72;
  color: #ffffff;
}

.os-filter {
  background-color: rgba(100, 116, 139, 0.2);
  color: #94a3b8;
  border: 1px solid #475569;
}

.os-filter.active {
  background-color: #94a3b8;
  color: #1f2937;
  border-color: #94a3b8;
}

.os-filter.filter-all {
  background-color: rgba(88, 166, 255, 0.15) !important;
  color: #58a6ff !important;
  border: 1px solid #58a6ff !important;
}

.os-filter.filter-all.active {
  background-color: #58a6ff !important;
  color: #ffffff !important;
  border-color: #58a6ff !important;
}

.os-filter[data-filter="linux"],
.filter-btn[data-filter="linux"] {
  background-color: rgba(255, 193, 7, 0.15) !important;
  color: #ffc107 !important;
  border: 1px solid #ff9800 !important;
}

.os-filter[data-filter="email"],
.filter-btn[data-filter="email"] {
  background-color: rgba(94, 234, 212, 0.18) !important;
  color: #5eead4 !important;
  border: 1px solid #2dd4bf !important;
}

.os-filter[data-filter="linux"].active,
.filter-btn[data-filter="linux"].active {
  background-color: #ffc107 !important;
  color: #1f2937 !important;
  border-color: #ffc107 !important;
}

.os-filter[data-filter="windows"],
.filter-btn[data-filter="windows"] {
  background-color: rgba(0, 158, 224, 0.15) !important;
  color: #00a8e8 !important;
  border: 1px solid #0078d4 !important;
}

.os-filter[data-filter="windows"].active,
.filter-btn[data-filter="windows"].active {
  background-color: #00a8e8 !important;
  color: #ffffff !important;
  border-color: #00a8e8 !important;
}

.filter-results {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  margin-top: 1rem;
}

#results-count {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.clear-filters-btn {
  background-color: transparent;
  color: var(--text-link);
  border: 1px solid var(--text-link);
  padding: 0.4rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.clear-filters-btn:hover {
  background-color: var(--text-link);
  color: #ffffff;
  transform: translateY(-1px);
}

/* Writeup Grid */
.writeup-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

@media (max-width: 768px) {
  .writeup-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
  }
}

.writeup-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  text-decoration: none;
  transition: all 0.3s ease;
  display: block;
  height: 100%;
  min-height: 280px;
}

.writeup-card:hover {
  transform: translateY(-4px);
  border-color: var(--text-link);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
  text-decoration: none;
}

.card-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  height: 100%;
}

.card-icon {
  width: 220px;
  height: 220px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  overflow: hidden;
  background: transparent;
  padding: 0;
}

.card-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.card-icon--banner {
  width: 100%;
  height: 140px;
  border-radius: 14px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
}

.card-icon--banner img {
  object-fit: contain;
  border-radius: 12px;
  width: 100%;
  height: 100%;
}

.card-icon.fallback-icon {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 3rem;
  font-weight: 700;
}

.card-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0.5rem 0;
  line-height: 1.3;
}

.card-meta {
  display: flex;
  gap: 0.5rem;
  margin: 0.75rem 0;
  flex-wrap: wrap;
  justify-content: center;
}

.difficulty-badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
}

.difficulty-easy {
  background-color: rgba(40, 167, 69, 0.2);
  color: #28a745;
  border: 1px solid #28a745;
}

.difficulty-medium {
  background-color: rgba(253, 126, 20, 0.2);
  color: #fd7e14;
  border: 1px solid #fd7e14;
}

.difficulty-hard {
  background-color: rgba(220, 53, 69, 0.2);
  color: #dc3545;
  border: 1px solid #dc3545;
}

.difficulty-insane {
  background: linear-gradient(135deg, rgba(192, 192, 192, 0.25), rgba(169, 169, 169, 0.25));
  color: #c0c0c0;
  border: 1px solid #a9a9a9;
  box-shadow: 0 0 8px rgba(192, 192, 192, 0.3);
  text-shadow: 0 0 4px rgba(192, 192, 192, 0.5);
}

.platform-badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 500;
}

.platform-hackthebox {
  background-color: rgba(159, 239, 0, 0.15);
  color: #9fef00;
  border: 1px solid #9fef00;
}

.platform-tryhackme {
  background-color: rgba(33, 44, 66, 0.4);
  color: #88cc14;
  border: 1px solid #88cc14;
}

.platform-proving-grounds {
  background-color: rgba(147, 51, 234, 0.2);
  color: #a855f7;
  border: 1px solid #a855f7;
}

.platform-btlo {
  background-color: rgba(56, 189, 248, 0.18);
  color: #38bdf8;
  border: 1px solid #38bdf8;
}

.platform-pwnable {
  background-color: rgba(88, 166, 255, 0.15);
  color: #58a6ff;
  border: 1px solid #58a6ff;
}

.platform-picoctf {
  background-color: rgba(255, 123, 114, 0.15);
  color: #ff7b72;
  border: 1px solid #ff7b72;
}

.card-tags {
  display: flex;
  gap: 0.4rem;
  margin-top: auto;
  padding-top: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.tag-small {
  background-color: var(--bg-tertiary);
  padding: 3px 8px;
  border-radius: 8px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.os-badge-container {
  margin: 0.5rem 0;
}

.os-badge {
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 500;
  background-color: rgba(100, 116, 139, 0.2);
  color: #94a3b8;
  border: 1px solid #475569;
}

.os-badge[data-os="Linux"],
.os-badge[data-os="linux"] {
  background-color: rgba(255, 193, 7, 0.15);
  color: #ffc107;
  border: 1px solid #ff9800;
}

.os-badge[data-os="Windows"],
.os-badge[data-os="windows"] {
  background-color: rgba(0, 158, 224, 0.15);
  color: #00a8e8;
  border: 1px solid #0078d4;
}

.os-badge[data-os="Email"],
.os-badge[data-os="email"] {
  background-color: rgba(94, 234, 212, 0.18);
  color: #5eead4;
  border: 1px solid #2dd4bf;
}

/* Legacy layout support for CTF/post pages */
.site-header {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  padding: 1.5rem 0;
}

.site-header .breadcrumb a,
.site-header .breadcrumb .divider {
  color: var(--text-secondary) !important;
}

.site-header .breadcrumb a:hover {
  color: var(--text-primary) !important;
}

.page-title {
  color: var(--text-primary) !important;
}

.page-content {
  padding: 2rem 0 !important;
}

.meta {
  color: var(--text-secondary) !important;
}

/* Markdown content styling (Rootinator-inspired, dark-safe) */
.markdown-body {
  max-width: 100% !important;
  width: 100% !important;
  margin: 0 !important;
  padding: 2rem 0 !important;
  background-color: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  font-size: 15px !important;
  line-height: 1.7 !important;
  color: var(--text-primary) !important;
}

.markdown-body h1 {
  font-size: 2rem !important;
  color: var(--text-primary) !important;
  margin-top: 2rem !important;
  margin-bottom: 1rem !important;
  padding-bottom: 0.5rem !important;
  border-bottom: 2px solid var(--border-color) !important;
}

.markdown-body h2 {
  font-size: 1.6rem !important;
  color: var(--text-primary) !important;
  margin-top: 2rem !important;
  margin-bottom: 0.8rem !important;
  padding-bottom: 0.3rem !important;
  border-bottom: 1px solid var(--border-color) !important;
}

.markdown-body h3 {
  font-size: 1.3rem !important;
  color: var(--text-primary) !important;
  margin-top: 1.5rem !important;
  margin-bottom: 0.6rem !important;
}

.markdown-body h4 {
  font-size: 1.1rem !important;
  color: var(--text-secondary) !important;
  margin-top: 1.2rem !important;
  margin-bottom: 0.5rem !important;
}

/* Markdown block layout */
.markdown-body .content-block {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 2rem 2.25rem;
  margin: 2rem 0;
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
}

.markdown-body .content-block > *:first-child {
  margin-top: 0 !important;
}

.markdown-body .content-block > *:last-child {
  margin-bottom: 0 !important;
}

.markdown-body .content-block > h2 {
  margin-top: 0 !important;
}

html[data-theme="black"] .markdown-body .content-block {
  background: #121722;
  border-color: #2f3a4d;
  box-shadow:
    0 18px 36px rgba(0, 0, 0, 0.55),
    inset 0 0 0 1px rgba(148, 163, 184, 0.06);
}

.markdown-body p {
  margin-bottom: 1.2rem !important;
  color: var(--text-primary) !important;
}

.markdown-body ul,
.markdown-body ol {
  margin-bottom: 1.2rem !important;
  padding-left: 2rem !important;
  color: var(--text-primary) !important;
}

.markdown-body li {
  margin-bottom: 0.5rem !important;
  line-height: 1.6 !important;
}

.markdown-body pre {
  background-color: var(--code-bg) !important;
  border: 1px solid var(--code-border) !important;
  border-radius: 6px !important;
  padding: 1rem !important;
  overflow-x: auto !important;
  overflow-y: auto !important;
  max-height: 400px !important;
  margin-bottom: 1.5rem !important;
  line-height: 1.5 !important;
}

.markdown-body code {
  font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace !important;
  font-size: 0.9em !important;
  white-space: pre !important;
}

.markdown-body pre code {
  background: none !important;
  border: none !important;
  padding: 0 !important;
  color: var(--text-primary) !important;
  white-space: pre !important;
  word-break: normal !important;
  word-wrap: normal !important;
}

.markdown-body p code,
.markdown-body li code {
  background-color: var(--code-bg) !important;
  border: 1px solid var(--code-border) !important;
  padding: 2px 6px !important;
  border-radius: 3px !important;
  color: #b42318 !important;
  white-space: nowrap !important;
}

.markdown-body img {
  max-width: 100% !important;
  height: auto !important;
  border-radius: 6px !important;
  margin: 1.5rem 0 !important;
  border: 1px solid var(--border-color) !important;
  display: block !important;
}

.markdown-body blockquote {
  border-left: 4px solid var(--text-link) !important;
  padding-left: 1rem !important;
  margin: 1.5rem 0 !important;
  background-color: var(--bg-tertiary) !important;
  padding: 1rem !important;
  border-radius: 4px !important;
  color: var(--text-secondary) !important;
  font-style: italic !important;
}

.markdown-body table {
  width: 100% !important;
  border-collapse: collapse !important;
  margin: 1.5rem 0 !important;
  table-layout: fixed !important;
}

.markdown-body thead {
  background-color: var(--bg-tertiary) !important;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--border-color) !important;
  padding: 0.75rem 1rem !important;
  text-align: left !important;
  vertical-align: top !important;
  color: var(--text-primary) !important;
}

.markdown-body tr:nth-child(even) {
  background-color: rgba(15, 23, 42, 0.03) !important;
}

.markdown-body hr {
  border: none !important;
  border-top: 1px solid var(--border-color) !important;
  margin: 2rem 0 !important;
}

.markdown-body a {
  color: var(--text-link) !important;
  text-decoration: none !important;
  border-bottom: 1px solid transparent !important;
  transition: all 0.2s ease !important;
}

.markdown-body a:hover {
  color: var(--text-link-hover) !important;
  border-bottom-color: var(--text-link-hover) !important;
}

.markdown-body .footnotes {
  margin-top: 3rem !important;
  padding-top: 1rem !important;
  border-top: 1px solid var(--border-color) !important;
  font-size: 0.9em !important;
  color: var(--text-secondary) !important;
}

.markdown-body .admonition {
  border-left: 4px solid var(--text-link) !important;
  background-color: var(--bg-tertiary) !important;
  padding: 1rem !important;
  border-radius: 6px !important;
  color: var(--text-secondary) !important;
  margin: 1.5rem 0 !important;
}

.markdown-body .case-timeline {
  border-left: 2px solid var(--text-link) !important;
  margin: 1rem 0 2rem !important;
  padding-left: 1rem !important;
}

.markdown-body .timeline-date {
  font-family: "JetBrains Mono", "SF Mono", Monaco, Consolas, monospace !important;
  color: var(--text-link) !important;
  margin-bottom: 0.9rem !important;
  font-size: 0.95rem !important;
}

.markdown-body .timeline-item {
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border-color) !important;
  border-radius: 10px !important;
  padding: 0.75rem 0.95rem !important;
  margin-bottom: 0.75rem !important;
  box-shadow: 0 8px 16px rgba(15, 23, 42, 0.06) !important;
}

.markdown-body .timeline-time {
  font-family: "JetBrains Mono", "SF Mono", Monaco, Consolas, monospace !important;
  font-size: 0.9rem !important;
  color: var(--text-secondary) !important;
  margin-bottom: 0.25rem !important;
}

.markdown-body .timeline-source {
  font-size: 0.85rem !important;
  color: var(--text-secondary) !important;
  margin-bottom: 0.3rem !important;
}

.markdown-body .timeline-event {
  color: var(--text-primary) !important;
}

html[data-theme="black"] .markdown-body .timeline-item {
  box-shadow: 0 12px 22px rgba(0, 0, 0, 0.45) !important;
}