/* ============================================================
   blog.css — Taliesin Learning Hub (HackTricks-style knowledge base)
   Nested collapsible sidebar, article layout, code blocks,
   callouts, screenshot figures, tables, on-page contents.
   ============================================================ */

.kb-shell {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 1.75rem;
  align-items: start;
  width: var(--container-wide);
  margin-inline: auto;
  padding: clamp(1.5rem, 4vw, 2.75rem) 0;
}

.kb-shell.with-toc {
  grid-template-columns: 290px minmax(0, 1fr) 230px;
}

/* ---------- Sidebar ---------- */
.kb-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 1rem);
  max-height: calc(100vh - var(--header-height) - 2rem);
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  padding: 1rem 0.85rem 1.25rem;
}

.kb-sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.25rem 0.4rem 0.85rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

.kb-sidebar-head .kb-title {
  font-family: "Montserrat", sans-serif;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--text-strong);
}

.kb-search {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0.65rem;
  font: inherit;
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}

.kb-search:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 1px;
}

/* Nested folder-style navigation built from <details>/<summary> */
.kb-nav,
.kb-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.kb-nav .nav-group > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: "Montserrat", sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-strong);
  padding: 0.55rem 0.5rem;
  border-radius: 8px;
  user-select: none;
}

.kb-nav .nav-group > summary:hover {
  background: var(--surface-muted);
}

.kb-nav summary::-webkit-details-marker {
  display: none;
}

.kb-nav .nav-arrow {
  font-size: 0.6rem;
  color: var(--brand-secondary);
  transition: transform 0.2s ease;
  margin-left: auto;
}

.kb-nav details[open] > summary .nav-arrow {
  transform: rotate(90deg);
}

/* nested subgroup (folder within folder) */
.kb-nav .nav-subgroup > summary {
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-body);
  padding-left: 1.4rem;
}

.kb-nav .nav-subgroup,
.kb-nav .nav-links {
  margin-left: 0.55rem;
  padding-left: 0.55rem;
  border-left: 1px solid var(--border);
}

.kb-nav .nav-links a,
.kb-nav .nav-subgroup .nav-links a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-body);
  padding: 0.4rem 0.55rem;
  border-radius: 7px;
  line-height: 1.35;
}

.kb-nav .nav-links a:hover {
  background: var(--surface-muted);
  color: var(--brand-secondary);
}

.kb-nav .nav-links a.is-active {
  background: rgba(154, 205, 50, 0.16);
  color: var(--brand-secondary);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--brand-secondary);
}

.kb-nav .nav-links a .tag-soon {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0 0.3rem;
  margin-left: 0.35rem;
}

/* ---------- Article ---------- */
.kb-article {
  min-width: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: clamp(1.5rem, 3vw, 2.75rem);
}

.kb-breadcrumbs {
  font-family: "Consolas", "SFMono-Regular", monospace;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  word-break: break-word;
}

.kb-breadcrumbs a {
  color: var(--brand-secondary);
}

.kb-article h1 {
  font-family: "Montserrat", sans-serif;
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  line-height: 1.2;
  margin: 0 0 0.5rem;
  color: var(--text-strong);
}

.kb-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.1rem;
  margin-bottom: 1.6rem;
}

.kb-meta .difficulty {
  font-weight: 700;
}

.kb-article h2 {
  font-family: "Montserrat", sans-serif;
  font-size: 1.5rem;
  margin: 2.4rem 0 0.9rem;
  padding-top: 0.6rem;
  color: var(--text-strong);
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.kb-article h2::before {
  content: "# ";
  color: var(--brand-primary);
  font-family: "Consolas", monospace;
}

.kb-article h3 {
  font-family: "Montserrat", sans-serif;
  font-size: 1.16rem;
  margin: 1.8rem 0 0.6rem;
  color: var(--text-strong);
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.kb-article p,
.kb-article li {
  color: var(--text-body);
}

.kb-article ul,
.kb-article ol {
  padding-left: 1.4rem;
}

.kb-article li {
  margin-bottom: 0.45rem;
}

.kb-article a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---------- Step list ---------- */
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 1.25rem 0;
}

.steps > li {
  counter-increment: step;
  position: relative;
  padding: 0.2rem 0 1.2rem 3rem;
  border-left: 2px solid var(--border);
  margin-left: 1.1rem;
}

.steps > li:last-child {
  border-left-color: transparent;
  padding-bottom: 0.2rem;
}

.steps > li::before {
  content: counter(step);
  position: absolute;
  left: -1.1rem;
  top: 0;
  width: 2.2rem;
  height: 2.2rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-secondary), var(--brand-primary));
  color: #fff;
  font-family: "Montserrat", sans-serif;
  font-weight: 800;
  font-size: 0.95rem;
}

.steps > li > h3:first-child {
  margin-top: 0;
}

/* ---------- Code & terminal ---------- */
.code-block,
.command-block,
.terminal {
  position: relative;
  background: #0f1720;
  color: #d7e2ef;
  border-radius: 10px;
  padding: 0.95rem 1rem;
  overflow-x: auto;
  font-family: "Consolas", "SFMono-Regular", "Courier New", monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 1rem 0;
}

.terminal {
  padding-top: 2.4rem;
}

.terminal::before {
  content: "";
  position: absolute;
  top: 0.85rem;
  left: 1rem;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: #ff5f56;
  box-shadow: 1.1rem 0 0 #ffbd2e, 2.2rem 0 0 #27c93f;
}

.terminal .term-title {
  position: absolute;
  top: 0.6rem;
  left: 4rem;
  font-size: 0.78rem;
  color: #7c8ba1;
}

.code-block pre,
.terminal pre {
  margin: 0;
  white-space: pre;
}

.terminal .prompt {
  color: var(--brand-primary);
  user-select: none;
}

.terminal .comment {
  color: #6b7b8c;
}

.terminal .out {
  color: #9fb3c8;
}

.copy-btn {
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  background: rgba(255, 255, 255, 0.08);
  color: #d7e2ef;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 7px;
  font-size: 0.74rem;
  font-family: "Montserrat", sans-serif;
  padding: 0.25rem 0.55rem;
  cursor: pointer;
  transition: background 0.15s ease;
}

.copy-btn:hover {
  background: rgba(154, 205, 50, 0.25);
}

.copy-btn.copied {
  background: var(--brand-secondary);
  color: #fff;
  border-color: var(--brand-secondary);
}

code:not(.code-block code):not(.terminal code) {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.08rem 0.35rem;
  font-family: "Consolas", monospace;
  font-size: 0.88em;
  color: #324b00;
}

/* ---------- Callouts ---------- */
.callout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 10px;
  padding: 0.95rem 1.1rem;
  margin: 1.25rem 0;
  background: #fbfff2;
}

.callout .ico {
  font-size: 1.2rem;
  line-height: 1.4;
}

.callout p {
  margin: 0;
}

.callout p + p {
  margin-top: 0.5rem;
}

.callout-tip {
  border-left-color: #2f7f9f;
  background: #f2fbff;
}

.callout-warning {
  border-left-color: #be7b00;
  background: #fff9ef;
}

.callout-danger {
  border-left-color: #c0392b;
  background: #fff3f1;
}

.callout-note {
  border-left-color: var(--brand-secondary);
}

/* ---------- Screenshot figures ---------- */
.screenshot {
  margin: 1.5rem 0;
}

.screenshot img {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  background: var(--surface-muted);
}

.screenshot figcaption {
  margin-top: 0.55rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: center;
}

.screenshot figcaption .fig-num {
  font-weight: 700;
  color: var(--brand-secondary);
}

/* placeholder injected when a screenshot is not yet available */
.shot-placeholder {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 0.4rem;
  width: 100%;
  min-height: 200px;
  border: 2px dashed rgba(107, 142, 35, 0.4);
  border-radius: 10px;
  background:
    repeating-linear-gradient(45deg, #f7faf0, #f7faf0 12px, #f1f6e6 12px, #f1f6e6 24px);
  color: var(--text-muted);
  padding: 1.5rem;
}

.shot-placeholder .shot-ico {
  font-size: 1.6rem;
}

.shot-placeholder .shot-label {
  font-family: "Consolas", monospace;
  font-size: 0.82rem;
  color: var(--brand-secondary);
}

/* ---------- Tables ---------- */
.kb-article .table-wrap {
  overflow-x: auto;
  margin: 1.25rem 0;
}

.kb-article table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.kb-article th,
.kb-article td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  vertical-align: top;
}

.kb-article thead th {
  background: var(--surface-muted);
  font-family: "Montserrat", sans-serif;
}

.kb-article tbody tr:nth-child(even) {
  background: #fafcf5;
}

/* ---------- On-page table of contents ---------- */
.kb-toc {
  position: sticky;
  top: calc(var(--header-height) + 1rem);
  max-height: calc(100vh - var(--header-height) - 2rem);
  overflow-y: auto;
  font-size: 0.86rem;
}

.kb-toc strong {
  display: block;
  font-family: "Montserrat", sans-serif;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.kb-toc a {
  display: block;
  color: var(--text-muted);
  padding: 0.28rem 0.6rem;
  border-left: 2px solid var(--border);
  line-height: 1.35;
}

.kb-toc a.lvl-3 {
  padding-left: 1.4rem;
  font-size: 0.82rem;
}

.kb-toc a:hover,
.kb-toc a.is-active {
  color: var(--brand-secondary);
  border-left-color: var(--brand-secondary);
}

/* ---------- Prev / next ---------- */
.kb-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.kb-pager a {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.kb-pager a:hover {
  border-color: var(--brand-secondary);
  transform: translateY(-2px);
}

.kb-pager .dir {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.kb-pager .title {
  font-weight: 600;
  color: var(--text-strong);
}

.kb-pager .next {
  text-align: right;
}

/* ---------- Section landing (folder index) cards ---------- */
.kb-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.1rem;
  margin: 1.5rem 0;
}

.kb-index-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.2rem;
  background: #fff;
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.kb-index-card:hover {
  border-color: var(--brand-secondary);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.kb-index-card .num {
  font-family: "Consolas", monospace;
  font-size: 0.78rem;
  color: var(--brand-secondary);
}

.kb-index-card h3 {
  margin: 0;
  font-family: "Montserrat", sans-serif;
  font-size: 1.05rem;
  color: var(--text-strong);
}

.kb-index-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ---------- Numbered phase / step list ---------- */
.phase-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 1.5rem 0;
}

.phase-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  border: 1px solid var(--border);
  border-left: 4px solid var(--brand-secondary);
  border-radius: 10px;
  padding: 1rem 1.2rem;
  background: #fff;
}

.phase-item .phase-num {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: var(--brand-secondary);
  color: #fff;
  font-family: "Montserrat", sans-serif;
  font-weight: 800;
  font-size: 1rem;
}

.phase-item h3 {
  margin: 0 0 0.25rem;
  font-family: "Montserrat", sans-serif;
  font-size: 1.02rem;
  color: var(--text-strong);
}

.phase-item p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* learning-path progress strip */
.path-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 1rem 0 0;
}

.path-strip .node {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.7rem;
  background: #fff;
}

.path-strip .node.current {
  background: var(--brand-secondary);
  color: #fff;
  border-color: var(--brand-secondary);
}

.path-strip .arrow {
  color: var(--brand-primary);
}

/* mobile sidebar toggle */
.kb-sidebar-toggle {
  display: none;
}

@media (max-width: 1100px) {
  .kb-shell.with-toc {
    grid-template-columns: 290px minmax(0, 1fr);
  }
  .kb-toc {
    display: none;
  }
}

@media (max-width: 880px) {
  .kb-shell,
  .kb-shell.with-toc {
    grid-template-columns: 1fr;
  }

  .kb-sidebar-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    justify-content: space-between;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-family: "Montserrat", sans-serif;
    font-weight: 700;
    cursor: pointer;
    margin-bottom: 0.75rem;
  }

  .kb-sidebar {
    position: static;
    max-height: none;
    display: none;
  }

  .kb-sidebar.open {
    display: block;
  }

  .kb-pager {
    grid-template-columns: 1fr;
  }
}