/* ============================================================
   3dCMS — Knowledge Base (/learn)
   Brand tokens lifted from the /about design system
   (colors_and_type.css). Adds a full docs layout + a dark theme.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Figtree:ital,wght@0,300..900;1,300..900&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  /* ---------- Brand palette ---------- */
  --green-500: #a8ca4f;
  --green-600: #7e9b3a;
  --green-700: #6f8f33;
  --green-300: #c7df7a;
  --green-200: #dceba2;
  --green-100: #eef6d4;

  --slate-900: #1e2936;
  --slate-700: #3a4656;
  --slate-500: #5d6b7e;
  --slate-400: #7a8ca8;
  --slate-300: #b0c2e0;
  --slate-200: #c9d4e6;

  --gizmo-green: #1a9e6a;

  /* ---------- Surfaces & background ---------- */
  --app-bg:        #edf2f8;
  --app-bg-deep:   #dbe5f1;
  --surface:       #ffffff;
  --surface-2:     #f5f8fc;
  --surface-3:     #eaeff6;
  --hairline:      #e6ebf2;
  --hairline-soft: #eef2f7;

  --chip-dark:     rgba(30, 41, 54, 0.86);
  --chip-dark-fg:  #eef2f7;

  /* ---------- Semantic ---------- */
  --fg:          var(--slate-900);
  --fg-2:        var(--slate-500);
  --fg-muted:    var(--slate-400);
  --fg-label:    var(--slate-300);
  --fg-brand:    var(--green-700);
  --accent:      var(--green-500);
  --accent-ink:  var(--green-600);
  --accent-soft: var(--green-200);
  --accent-wash: var(--green-100);

  --danger:      #e07a7a;
  --danger-soft: #f6c9c9;
  --danger-bg:   #fdf2f2;

  --info:        #5b8ad6;
  --info-bg:     #eef4fc;
  --info-border: #cfe0f5;

  --warn:        #c98a2e;
  --warn-bg:     #fbf3e4;
  --warn-border: #f0dcb6;

  --money:       #2f9e6a;
  --money-bg:    #e9f7f0;
  --money-border:#bfe6d4;

  --code-bg:     #f4f7fb;
  --code-fg:     #44525f;
  --code-border: #e6ebf2;
  --kbd-bg:      #ffffff;
  --kbd-fg:      #3a4656;
  --kbd-border:  #d4dde9;
  --kbd-shadow:  0 1.5px 0 #d4dde9;

  /* ---------- Radii ---------- */
  --r-pill: 999px;
  --r-card: 20px;
  --r-panel: 16px;
  --r-input: 11px;
  --r-btn: 12px;
  --r-sm: 8px;

  /* ---------- Shadows ---------- */
  --shadow-pill:  0 2px 8px rgba(30,41,54,0.08), 0 1px 2px rgba(30,41,54,0.06);
  --shadow-card:  0 10px 30px rgba(30,41,54,0.08), 0 2px 6px rgba(30,41,54,0.04);
  --shadow-pop:   0 18px 50px rgba(30,41,54,0.16), 0 4px 12px rgba(30,41,54,0.08);
  --shadow-inset: inset 0 1px 2px rgba(30,41,54,0.05);
  --ring-accent:  0 0 0 3px rgba(168,202,79,0.32);

  /* ---------- Type ---------- */
  --font-sans: 'Figtree', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', monospace;

  --topbar-h: 60px;
  --sidebar-w: 296px;
  --content-max: 1180px;
}

/* ---------- Dark theme ---------- */
[data-theme="dark"] {
  --green-600: #acd25a;
  --green-700: #bcdd6e;

  --app-bg:        #141b24;
  --app-bg-deep:   #0f151d;
  --surface:       #1c2632;
  --surface-2:     #232f3d;
  --surface-3:     #2a3849;
  --hairline:      #2e3b4d;
  --hairline-soft: #283443;

  --chip-dark:     rgba(8, 12, 18, 0.7);

  --fg:          #eef2f7;
  --fg-2:        #b6c3d6;
  --fg-muted:    #8d9fb6;
  --fg-label:    #6d8099;
  --fg-brand:    var(--green-700);
  --accent:      var(--green-500);
  --accent-ink:  var(--green-300);
  --accent-soft: #3a4a26;
  --accent-wash: #232d18;

  --danger:      #ef9a9a;
  --danger-soft: #5e3535;
  --danger-bg:   #2a1c1c;

  --info:        #8fb6ec;
  --info-bg:     #1a2433;
  --info-border: #2c3d57;

  --warn:        #e6b667;
  --warn-bg:     #2a2316;
  --warn-border: #4a3b1f;

  --money:       #6fd3a3;
  --money-bg:    #16271f;
  --money-border:#274d3a;

  --code-bg:     #141d27;
  --code-fg:     #c5d2e0;
  --code-border: #2a3849;
  --kbd-bg:      #232f3d;
  --kbd-fg:      #d7e0ec;
  --kbd-border:  #38475b;
  --kbd-shadow:  0 1.5px 0 #11181f;

  --shadow-pill:  0 2px 8px rgba(0,0,0,0.30), 0 1px 2px rgba(0,0,0,0.24);
  --shadow-card:  0 10px 30px rgba(0,0,0,0.34), 0 2px 6px rgba(0,0,0,0.22);
  --shadow-pop:   0 18px 50px rgba(0,0,0,0.5), 0 4px 12px rgba(0,0,0,0.34);
  --ring-accent:  0 0 0 3px rgba(168,202,79,0.28);
}

/* ============================================================
   Base
   ============================================================ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }

body {
  font: 400 15px/1.6 var(--font-sans);
  color: var(--fg);
  background: var(--app-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

::selection { background: rgba(168,202,79,0.32); }

/* nice scrollbars */
.kb-sidebar::-webkit-scrollbar, .kb-toc::-webkit-scrollbar, .search-results::-webkit-scrollbar { width: 10px; }
.kb-sidebar::-webkit-scrollbar-thumb, .kb-toc::-webkit-scrollbar-thumb, .search-results::-webkit-scrollbar-thumb {
  background: var(--hairline); border-radius: 99px; border: 3px solid transparent; background-clip: padding-box;
}
.kb-sidebar:hover::-webkit-scrollbar-thumb { background: var(--slate-300); background-clip: padding-box; }

/* ============================================================
   Top bar
   ============================================================ */
.kb-topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h); z-index: 60;
  display: flex; align-items: center; gap: 14px; padding: 0 20px;
  background: color-mix(in srgb, var(--app-bg) 82%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--hairline);
}
.kb-brand {
  display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--fg);
  font-weight: 700; font-size: 17px; letter-spacing: -0.4px; white-space: nowrap;
}
.kb-brand:hover { text-decoration: none; }
.kb-brand .pill {
  display: inline-flex; align-items: center; background: var(--surface); border: 1px solid var(--hairline);
  border-radius: var(--r-pill); box-shadow: var(--shadow-pill); padding: 6px 13px;
}
.kb-brand .kb-tag {
  font: 600 11px/1 var(--font-sans); text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--fg-brand); padding: 4px 9px; border-radius: var(--r-pill);
  background: var(--accent-wash); border: 1px solid var(--accent-soft);
}
.kb-topbar-spacer { flex: 1; }

.kb-hamburger {
  display: none; align-items: center; justify-content: center; width: 38px; height: 38px;
  border-radius: var(--r-sm); border: 1px solid var(--hairline); background: var(--surface);
  color: var(--fg); cursor: pointer; flex: none;
}
.kb-hamburger:hover { background: var(--surface-2); }
.kb-hamburger i { width: 19px; height: 19px; }

/* search */
.kb-search { position: relative; flex: 1; max-width: 440px; }
.kb-search-input-wrap {
  display: flex; align-items: center; gap: 9px; height: 40px; padding: 0 12px;
  background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--r-input);
  box-shadow: var(--shadow-inset); transition: border-color .15s, box-shadow .15s;
}
.kb-search-input-wrap:focus-within { border-color: var(--accent); box-shadow: var(--ring-accent); }
.kb-search-input-wrap i.search-icn { width: 17px; height: 17px; color: var(--fg-muted); flex: none; }
.kb-search input {
  border: none; outline: none; background: transparent; width: 100%; color: var(--fg);
  font: 400 14.5px var(--font-sans);
}
.kb-search input::placeholder { color: var(--fg-muted); }
.kb-search .kbd-hint {
  font: 600 11px var(--font-mono); color: var(--fg-muted); border: 1px solid var(--hairline);
  border-radius: 6px; padding: 2px 7px; background: var(--surface-2); flex: none;
}
.search-results {
  position: absolute; top: calc(100% + 8px); left: 0; right: 0; max-height: 64vh; overflow-y: auto;
  background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--r-panel);
  box-shadow: var(--shadow-pop); padding: 7px; display: none; z-index: 70;
}
.search-results.open { display: block; }
.search-empty { padding: 22px 16px; text-align: center; color: var(--fg-muted); font-size: 14px; }
.search-empty b { color: var(--fg-2); }
.sr-item {
  display: block; width: 100%; text-align: left; border: none; cursor: pointer; background: transparent;
  padding: 10px 12px; border-radius: var(--r-sm); color: var(--fg); text-decoration: none;
}
.sr-item:hover, .sr-item.active { background: var(--accent-wash); text-decoration: none; }
.sr-item .sr-sec { font: 600 10.5px var(--font-sans); text-transform: uppercase; letter-spacing: .1em; color: var(--accent-ink); }
.sr-item .sr-title { font-weight: 600; font-size: 14.5px; margin: 1px 0; color: var(--fg); }
.sr-item .sr-snip { font-size: 12.5px; color: var(--fg-muted); line-height: 1.45; }
.sr-item mark { background: var(--accent-soft); color: inherit; border-radius: 3px; padding: 0 1px; }

/* top-bar buttons */
.kb-iconbtn {
  display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px;
  border-radius: var(--r-sm); border: 1px solid var(--hairline); background: var(--surface);
  color: var(--fg-2); cursor: pointer; flex: none; transition: background .15s, color .15s;
}
.kb-iconbtn:hover { background: var(--surface-2); color: var(--fg); }
.kb-iconbtn i { width: 18px; height: 18px; }
.kb-openeditor {
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; flex: none;
  font: 600 14px var(--font-sans); color: #1f2a10; background: var(--accent);
  border: none; border-radius: var(--r-btn); padding: 9px 15px; cursor: pointer; box-shadow: var(--shadow-pill);
  text-decoration: none;
}
.kb-openeditor:hover { filter: brightness(.96); text-decoration: none; }
.kb-openeditor i { width: 16px; height: 16px; }

/* ============================================================
   Shell layout
   ============================================================ */
.kb-shell { display: flex; padding-top: var(--topbar-h); min-height: 100vh; }

.kb-sidebar {
  position: sticky; top: var(--topbar-h); align-self: flex-start;
  width: var(--sidebar-w); flex: none; height: calc(100vh - var(--topbar-h));
  overflow-y: auto; overscroll-behavior: contain;
  border-right: 1px solid var(--hairline); background: var(--app-bg);
  padding: 18px 12px 60px;
}
.kb-main { flex: 1; min-width: 0; display: flex; justify-content: center; }
.kb-main-inner { width: 100%; max-width: 1160px; padding: 30px 40px 90px; display: flex; gap: 40px; }
.kb-article-col { flex: 1; min-width: 0; max-width: 800px; }
.kb-toc {
  position: sticky; top: calc(var(--topbar-h) + 30px); align-self: flex-start;
  width: 200px; flex: none; max-height: calc(100vh - var(--topbar-h) - 60px); overflow-y: auto;
}

/* ---------- Sidebar tree ---------- */
.kb-nav-section { margin-bottom: 4px; }
.kb-nav-head {
  display: flex; align-items: center; gap: 9px; width: 100%; cursor: pointer;
  background: transparent; border: none; color: var(--fg); text-align: left;
  padding: 9px 10px; border-radius: var(--r-sm); font: 600 13.5px var(--font-sans);
  transition: background .12s;
}
.kb-nav-head:hover { background: var(--surface-2); }
.kb-nav-head .sec-icn {
  width: 28px; height: 28px; flex: none; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  background: var(--accent-wash); color: var(--accent-ink); border: 1px solid var(--accent-soft);
}
.kb-nav-head .sec-icn i { width: 15px; height: 15px; }
.kb-nav-head .sec-name { flex: 1; }
.kb-nav-head .chev { width: 16px; height: 16px; color: var(--fg-muted); transition: transform .18s; flex: none; }
.kb-nav-section.collapsed .chev { transform: rotate(-90deg); }
.kb-nav-list {
  list-style: none; margin: 2px 0 6px; padding: 0 0 0 14px;
  border-left: 1.5px solid var(--hairline); margin-left: 23px;
  overflow: hidden;
}
.kb-nav-section.collapsed .kb-nav-list { display: none; }
.kb-nav-list a {
  display: block; padding: 7px 11px; border-radius: var(--r-sm); color: var(--fg-2);
  font-size: 13.5px; line-height: 1.35; text-decoration: none; transition: background .12s, color .12s;
}
.kb-nav-list a:hover { background: var(--surface-2); color: var(--fg); text-decoration: none; }
.kb-nav-list a.active {
  background: var(--accent-wash); color: var(--accent-ink); font-weight: 600;
  box-shadow: inset 2.5px 0 0 var(--accent);
}

.kb-sidebar-foot { margin-top: 18px; padding: 14px 10px 0; border-top: 1px solid var(--hairline); }
.kb-sidebar-foot a { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; color: var(--fg-2); padding: 5px 0; }
.kb-sidebar-foot a i { width: 15px; height: 15px; }

/* ---------- TOC (on this page) ---------- */
.kb-toc-title { font: 600 11px var(--font-sans); text-transform: uppercase; letter-spacing: .13em; color: var(--fg-label); margin-bottom: 12px; }
.kb-toc ul { list-style: none; margin: 0; padding: 0; }
.kb-toc a {
  display: block; padding: 4px 0 4px 12px; font-size: 13px; color: var(--fg-muted);
  border-left: 2px solid var(--hairline); line-height: 1.4; text-decoration: none;
}
.kb-toc a.sub { padding-left: 24px; font-size: 12.5px; }
.kb-toc a:hover { color: var(--fg); text-decoration: none; }
.kb-toc a.active { color: var(--accent-ink); border-left-color: var(--accent); font-weight: 600; }

/* ============================================================
   Article content
   ============================================================ */
.kb-breadcrumb { display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--fg-muted); margin-bottom: 14px; flex-wrap: wrap; }
.kb-breadcrumb a { color: var(--fg-muted); }
.kb-breadcrumb a:hover { color: var(--accent-ink); }
.kb-breadcrumb .sep { opacity: .5; }
.kb-breadcrumb .cur { color: var(--fg-2); font-weight: 600; }

.kb-eyebrow { font: 600 11.5px var(--font-sans); text-transform: uppercase; letter-spacing: .14em; color: var(--accent-ink); }
.article-h1 { font: 700 34px/1.15 var(--font-sans); letter-spacing: -.02em; color: var(--fg); margin: 8px 0 0; }
.article-summary { font-size: 17.5px; line-height: 1.55; color: var(--fg-2); margin: 14px 0 0; text-wrap: pretty; }
.article-divider { height: 1px; background: var(--hairline); border: none; margin: 26px 0 8px; }

.kb-body { font-size: 15.5px; line-height: 1.68; color: var(--fg); }
.kb-body > *:first-child { margin-top: 0; }
.kb-body p { margin: 0 0 16px; color: var(--fg); text-wrap: pretty; }
.kb-body h2 {
  font: 700 23px/1.25 var(--font-sans); letter-spacing: -.015em; color: var(--fg);
  margin: 38px 0 14px; scroll-margin-top: calc(var(--topbar-h) + 18px); position: relative;
}
.kb-body h3 {
  font: 600 18px/1.3 var(--font-sans); color: var(--fg); margin: 28px 0 10px;
  scroll-margin-top: calc(var(--topbar-h) + 18px);
}
.kb-body h4 { font: 600 15px var(--font-sans); color: var(--fg); margin: 20px 0 8px; text-transform: none; }
.heading-anchor {
  opacity: 0; margin-left: 8px; color: var(--fg-muted); cursor: pointer; font-size: .7em;
  border: none; background: transparent; vertical-align: middle; transition: opacity .12s, color .12s;
}
.kb-body h2:hover .heading-anchor, .kb-body h3:hover .heading-anchor { opacity: 1; }
.heading-anchor:hover { color: var(--accent-ink); }

.kb-body a { color: var(--accent-ink); font-weight: 500; text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent-ink) 30%, transparent); }
.kb-body a:hover { border-bottom-color: var(--accent-ink); text-decoration: none; }

.kb-body ul, .kb-body ol { margin: 0 0 16px; padding-left: 22px; }
.kb-body li { margin: 6px 0; }
.kb-body li::marker { color: var(--accent-ink); }
.kb-body ul ul, .kb-body ol ol, .kb-body ul ol, .kb-body ol ul { margin: 6px 0; }

.kb-body strong { font-weight: 700; color: var(--fg); }
.kb-body em { font-style: italic; }
.kb-body hr { border: none; border-top: 1px solid var(--hairline); margin: 30px 0; }

/* inline code */
.kb-body code, .mono {
  font: 500 13px var(--font-mono); background: var(--code-bg); color: var(--code-fg);
  border: 1px solid var(--code-border); border-radius: 6px; padding: 1.5px 6px; white-space: nowrap;
}
.kb-body h2 code, .kb-body h3 code { font-size: .9em; }

/* code blocks */
.kb-body pre {
  margin: 0 0 18px; background: var(--code-bg); border: 1px solid var(--code-border);
  border-radius: var(--r-panel); padding: 16px 18px; overflow-x: auto;
}
.kb-body pre code {
  font: 500 13px/1.65 var(--font-mono); background: transparent; border: none; padding: 0;
  color: var(--code-fg); white-space: pre;
}
.code-block { position: relative; }
.code-copy {
  position: absolute; top: 10px; right: 10px; font: 600 11px var(--font-sans);
  background: var(--surface); border: 1px solid var(--hairline); color: var(--fg-2);
  border-radius: 7px; padding: 4px 9px; cursor: pointer; opacity: 0; transition: opacity .14s, background .14s;
}
.code-block:hover .code-copy { opacity: 1; }
.code-copy:hover { background: var(--surface-2); color: var(--fg); }
.code-copy.copied { color: var(--money); border-color: var(--money-border); }

/* keyboard chips */
kbd {
  font: 600 12px var(--font-mono); background: var(--kbd-bg); color: var(--kbd-fg);
  border: 1px solid var(--kbd-border); border-bottom-width: 2px; border-radius: 6px;
  padding: 1.5px 7px; box-shadow: var(--kbd-shadow); white-space: nowrap; display: inline-block;
  line-height: 1.5;
}

/* ---------- callouts ---------- */
.callout {
  display: flex; gap: 13px; margin: 20px 0; padding: 15px 17px; border-radius: var(--r-panel);
  border: 1px solid var(--info-border); background: var(--info-bg); font-size: 14.5px; line-height: 1.6;
}
.callout .co-icn { flex: none; width: 22px; height: 22px; color: var(--info); margin-top: 1px; }
.callout .co-icn i { width: 22px; height: 22px; }
.callout .co-body { min-width: 0; }
.callout .co-body > *:first-child { margin-top: 0; }
.callout .co-body > *:last-child { margin-bottom: 0; }
.callout .co-title { font-weight: 700; color: var(--fg); display: block; margin-bottom: 2px; }
.callout p { margin: 0 0 8px; }
.callout code { background: color-mix(in srgb, var(--surface) 60%, transparent); }

.callout.tip   { border-color: var(--money-border); background: var(--money-bg); }
.callout.tip   .co-icn { color: var(--money); }
.callout.warn  { border-color: var(--warn-border); background: var(--warn-bg); }
.callout.warn  .co-icn { color: var(--warn); }
.callout.danger{ border-color: var(--danger-soft); background: var(--danger-bg); }
.callout.danger .co-icn { color: var(--danger); }
.callout.money { border-color: var(--money-border); background: var(--money-bg); }
.callout.money .co-icn { color: var(--money); }
.callout.note  { border-color: var(--hairline); background: var(--surface-2); }
.callout.note  .co-icn { color: var(--fg-muted); }

/* ---------- step list ---------- */
.steps { list-style: none; counter-reset: step; margin: 18px 0 22px; padding: 0; }
.steps > li {
  position: relative; padding: 2px 0 18px 46px; margin: 0;
  border-left: 2px solid var(--hairline); margin-left: 14px;
}
.steps > li:last-child { border-left-color: transparent; padding-bottom: 2px; }
.steps > li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: -15px; top: -2px; width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: #1f2a10; font: 700 13px var(--font-sans);
  display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-pill);
}
.steps > li .step-title { font-weight: 700; color: var(--fg); display: block; margin-bottom: 2px; }
.steps > li > *:last-child { margin-bottom: 0; }

/* ---------- tables ---------- */
.kb-table-wrap { overflow-x: auto; margin: 0 0 20px; border: 1px solid var(--hairline); border-radius: var(--r-panel); }
.kb-body table { border-collapse: collapse; width: 100%; font-size: 14px; }
.kb-body table th {
  text-align: left; font: 600 12px var(--font-sans); text-transform: uppercase; letter-spacing: .04em;
  color: var(--fg-2); background: var(--surface-2); padding: 11px 14px; border-bottom: 1px solid var(--hairline); white-space: nowrap;
}
.kb-body table td { padding: 10px 14px; border-bottom: 1px solid var(--hairline-soft); vertical-align: top; color: var(--fg); }
.kb-body table tr:last-child td { border-bottom: none; }
.kb-body table td code { white-space: nowrap; }
.kb-body table kbd { font-size: 11.5px; }

/* ---------- feature/link cards ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 14px; margin: 22px 0; }
.kb-card {
  display: flex; flex-direction: column; gap: 4px; text-decoration: none; color: var(--fg);
  background: var(--surface); border: 1px solid var(--hairline); border-radius: var(--r-card);
  box-shadow: var(--shadow-card); padding: 18px 18px; transition: transform .16s, box-shadow .16s; cursor: pointer;
}
.kb-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-pop); text-decoration: none; }
.kb-card .c-icn { width: 38px; height: 38px; border-radius: 11px; background: var(--accent-wash); color: var(--accent-ink); border: 1px solid var(--accent-soft); display: flex; align-items: center; justify-content: center; margin-bottom: 8px; }
.kb-card .c-icn i { width: 19px; height: 19px; }
.kb-card .c-title { font-weight: 700; font-size: 15.5px; }
.kb-card .c-desc { font-size: 13.5px; color: var(--fg-muted); line-height: 1.45; }

/* pill row */
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 20px; }
.tag-pill {
  font: 500 12.5px var(--font-mono); padding: 5px 11px; border-radius: var(--r-pill);
  background: var(--surface); border: 1px solid var(--hairline); color: var(--fg-2);
}

/* definition rows */
.deflist { margin: 18px 0; }
.deflist .def { padding: 12px 0; border-bottom: 1px solid var(--hairline-soft); }
.deflist .def:last-child { border-bottom: none; }
.deflist .def dt { font-weight: 700; color: var(--fg); margin-bottom: 2px; }
.deflist .def dd { margin: 0; color: var(--fg-2); font-size: 14.5px; }

/* ---------- prev / next ---------- */
.kb-pagination { display: flex; gap: 14px; margin-top: 46px; padding-top: 26px; border-top: 1px solid var(--hairline); }
.kb-pag {
  flex: 1; display: flex; flex-direction: column; gap: 3px; text-decoration: none;
  border: 1px solid var(--hairline); border-radius: var(--r-panel); padding: 14px 16px; background: var(--surface);
  transition: border-color .15s, box-shadow .15s; min-width: 0;
}
.kb-pag:hover { border-color: var(--accent); box-shadow: var(--shadow-pill); text-decoration: none; }
.kb-pag.next { text-align: right; align-items: flex-end; }
.kb-pag .pag-label { font: 600 11px var(--font-sans); text-transform: uppercase; letter-spacing: .1em; color: var(--fg-muted); }
.kb-pag .pag-title { font-weight: 700; color: var(--accent-ink); font-size: 14.5px; }

.kb-feedback { margin-top: 40px; text-align: center; color: var(--fg-muted); font-size: 13.5px; }
.kb-feedback a { font-weight: 600; }

/* ============================================================
   Home / landing
   ============================================================ */
.kb-home { max-width: 1000px; }
.home-hero {
  position: relative; overflow: hidden; border-radius: var(--r-card);
  background:
    radial-gradient(680px 300px at 12% -20%, rgba(168,202,79,0.22), transparent 70%),
    linear-gradient(160deg, var(--surface), var(--surface-2));
  border: 1px solid var(--hairline); box-shadow: var(--shadow-card); padding: 48px 44px; margin-bottom: 30px;
}
.home-hero .grid-bg {
  position: absolute; inset: 0; opacity: .5; pointer-events: none;
  background:
    linear-gradient(var(--hairline) 1px, transparent 1px) 0 0/40px 40px,
    linear-gradient(90deg, var(--hairline) 1px, transparent 1px) 0 0/40px 40px;
  mask-image: linear-gradient(120deg, transparent 40%, #000 120%);
  -webkit-mask-image: linear-gradient(120deg, transparent 40%, #000 120%);
}
.home-hero .hero-content { position: relative; z-index: 2; }
.home-hero .eyebrow { font: 600 12px var(--font-sans); text-transform: uppercase; letter-spacing: .16em; color: var(--accent-ink); }
.home-hero h1 { font: 700 clamp(30px, 4.4vw, 46px)/1.08 var(--font-sans); letter-spacing: -.025em; margin: 12px 0 0; max-width: 17ch; }
.home-hero h1 em { font-style: normal; color: var(--accent-ink); }
.home-hero .hero-sub { font-size: clamp(16px, 2vw, 19px); line-height: 1.55; color: var(--fg-2); max-width: 54ch; margin: 18px 0 0; }
.home-hero .hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.home-hero .hero-search-hint { margin-top: 18px; font-size: 13.5px; color: var(--fg-muted); }
.home-hero .hero-search-hint kbd { margin: 0 2px; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 9px; font: 600 15px var(--font-sans);
  background: var(--accent); color: #1f2a10; border: none; border-radius: var(--r-btn);
  padding: 12px 22px; cursor: pointer; box-shadow: var(--shadow-pill); text-decoration: none;
}
.btn-primary:hover { filter: brightness(.96); transform: translateY(-1px); text-decoration: none; }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 9px; font: 600 15px var(--font-sans);
  background: var(--surface); color: var(--fg); border: 1px solid var(--hairline); border-radius: var(--r-btn);
  padding: 12px 20px; cursor: pointer; box-shadow: var(--shadow-pill); text-decoration: none;
}
.btn-ghost:hover { background: var(--surface-2); text-decoration: none; }
.btn-primary i, .btn-ghost i { width: 17px; height: 17px; }

.home-section-title { font: 700 13px var(--font-sans); text-transform: uppercase; letter-spacing: .12em; color: var(--fg-label); margin: 36px 0 4px; }

.home-sections { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; margin-top: 16px; }
.home-sec-card {
  display: block; text-decoration: none; color: var(--fg); background: var(--surface);
  border: 1px solid var(--hairline); border-radius: var(--r-card); box-shadow: var(--shadow-card);
  padding: 20px; transition: transform .16s, box-shadow .16s;
}
.home-sec-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-pop); text-decoration: none; }
.home-sec-card .hs-top { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.home-sec-card .hs-icn { width: 40px; height: 40px; border-radius: 11px; background: var(--accent-wash); color: var(--accent-ink); border: 1px solid var(--accent-soft); display: flex; align-items: center; justify-content: center; flex: none; }
.home-sec-card .hs-icn i { width: 20px; height: 20px; }
.home-sec-card .hs-name { font-weight: 700; font-size: 16px; }
.home-sec-card .hs-blurb { font-size: 13.5px; color: var(--fg-muted); line-height: 1.5; }
.home-sec-card .hs-links { margin-top: 12px; display: flex; flex-direction: column; gap: 2px; }
.home-sec-card .hs-links span { font-size: 13px; color: var(--accent-ink); display: flex; align-items: center; gap: 6px; }
.home-sec-card .hs-links span::before { content: "›"; color: var(--accent); font-weight: 700; }

.home-foot { margin-top: 50px; padding-top: 24px; border-top: 1px solid var(--hairline); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px; color: var(--fg-muted); font-size: 13px; }
.home-foot a { color: var(--fg-2); }

/* mobile drawer scrim */
.kb-scrim { position: fixed; inset: 0; background: rgba(15,21,29,0.42); z-index: 55; opacity: 0; pointer-events: none; transition: opacity .2s; }
.kb-scrim.open { opacity: 1; pointer-events: auto; }

/* loading / not-found */
.kb-notfound { text-align: center; padding: 60px 20px; }
.kb-notfound h1 { font-size: 26px; margin-bottom: 8px; }
.kb-notfound p { color: var(--fg-muted); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1100px) {
  .kb-toc { display: none; }
  .kb-main-inner { padding: 28px 32px 80px; }
}
@media (max-width: 860px) {
  :root { --sidebar-w: 300px; }
  .kb-hamburger { display: inline-flex; }
  .kb-sidebar {
    position: fixed; top: var(--topbar-h); left: 0; bottom: 0; height: auto; z-index: 58;
    transform: translateX(-100%); transition: transform .24s cubic-bezier(.4,0,.2,1);
    box-shadow: var(--shadow-pop); background: var(--app-bg);
  }
  .kb-sidebar.open { transform: translateX(0); }
  .kb-main-inner { padding: 24px 22px 70px; }
  .kb-openeditor span { display: none; }
  .kb-openeditor { padding: 9px 11px; }
  .kb-brand .kb-tag { display: none; }
}
@media (max-width: 620px) {
  .kb-search .kbd-hint { display: none; }
  .article-h1 { font-size: 27px; }
  .article-summary { font-size: 16px; }
  .kb-body { font-size: 15px; }
  .home-hero { padding: 32px 24px; }
  .kb-main-inner { padding: 20px 17px 60px; }
  .kb-pagination { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}