/* IT Fundamentals Handbook: layout and colours shared with the Data Steward Team Guide */
:root {
  --navy: #0d1b2a;
  --navy-mid: #1a2f45;
  --accent: #2e7dbe;
  --accent-light: #4a9fd4;
  --accent-pale: #e8f4fc;
  --gold: #c8922a;
  --surface: #f7f9fc;
  --surface2: #edf2f7;
  --border: #d0dae6;
  --text: #1a2535;
  --text-muted: #5a6a7e;
  --sidebar-w: 280px;
  --header-h: 64px;
}

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

body {
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  background: var(--surface);
  color: var(--text);
  line-height: 1.65;
}

/* ── TOP HEADER BAR ── */
#topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--navy);
  display: flex;
  align-items: center;
  padding: 0 24px;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
  gap: 16px;
}
#topbar .logo-badge {
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 4px;
}
#topbar h1 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.02em;
  margin: 0;
  padding: 0;
  border: 0;
  text-transform: none;
  text-align: left;
}
#topbar > nav { margin-left: auto; display: flex; min-width: 0; }
.nav-links { display: flex; gap: 2px; list-style: none; margin: 0; padding: 0; }
.nav-links li { margin: 0; }
.nav-links a {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.08); text-decoration: none; }

#menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: #fff;
  font-size: 20px;
  margin-right: 8px;
}

/* ── SIDEBAR ── */
#sidebar {
  position: fixed;
  top: var(--header-h);
  left: 0;
  width: var(--sidebar-w);
  height: calc(100vh - var(--header-h));
  background: var(--navy-mid);
  overflow-y: auto;
  z-index: 90;
  padding: 16px 0 40px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
  transition: transform 0.3s ease;
}
#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

/* ── SIDEBAR SEARCH ── */
#sidebar-search-wrap {
  padding: 12px 14px 10px;
  position: sticky;
  top: 0;
  background: var(--navy-mid);
  z-index: 10;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
#sidebar-search {
  width: 100%;
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 6px;
  padding: 7px 32px 7px 10px;
  font-size: 12.5px;
  color: #d4eaf5;
  font-family: 'DM Sans', sans-serif;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}
#sidebar-search::placeholder { color: #7a98b0; }
#sidebar-search:focus { border-color: var(--accent); background: rgba(0,0,0,0.35); }
#sidebar-search-wrap .search-icon {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  color: #7ca4c0;
  font-size: 13px;
  pointer-events: none;
}
#search-no-results {
  display: none;
  padding: 10px 20px;
  font-size: 12px;
  color: #8eb4cc;
  font-style: italic;
}
.nav-search-hidden { display: none !important; }

.nav-section { margin-bottom: 2px; }
.nav-section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px 9px 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #7ca4c0;
  cursor: pointer;
  user-select: none;
  transition: color 0.15s;
}
.nav-section-header:hover { color: #fff; }
.nav-section-header .chevron {
  margin-left: auto;
  font-size: 14px;
  transition: transform 0.2s;
  color: #7ca4c0;
}
.nav-section-header.open .chevron { transform: rotate(90deg); }

.nav-top-link {
  display: block;
  padding: 9px 18px 9px 20px;
  font-size: 13px;
  font-weight: 500;
  color: #c5d8ea;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  border-left: 3px solid transparent;
}
.nav-top-link:hover, .nav-top-link.active {
  background: rgba(46,125,190,0.18);
  color: #fff;
  border-left-color: var(--accent-light);
  text-decoration: none;
}

.nav-sub-links { display: none; background: rgba(0,0,0,0.15); }
.nav-sub-links.open { display: block; }
.nav-sub-link, .nav-sub-link2 {
  display: block;
  padding: 7px 18px 7px 34px;
  font-size: 12.5px;
  color: #8eb4cc;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
  border-left: 3px solid transparent;
}
.nav-sub-link2 { padding-left: 50px; font-size: 12px; }
.nav-sub-link:hover, .nav-sub-link.active,
.nav-sub-link2:hover, .nav-sub-link2.active {
  background: rgba(46,125,190,0.15);
  color: #d4eaf5;
  border-left-color: var(--accent);
  text-decoration: none;
}

/* ── MAIN CONTENT ── */
.main-container {
  display: block;
  margin-left: var(--sidebar-w);
  margin-top: var(--header-h);
  padding: 40px 36px 80px;
  max-width: calc(1800px + var(--sidebar-w));
}

/* Each top-level topic is a card */
.main-container > div {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px 36px;
  margin-bottom: 28px;
  scroll-margin-top: calc(var(--header-h) + 20px);
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
  transition: box-shadow 0.2s;
}
.main-container > div:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.08); }
.main-container [id] { scroll-margin-top: calc(var(--header-h) + 20px); }

/* ── HEADINGS ── */
h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent-pale);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
}
h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 22px;
  background: var(--accent);
  border-radius: 2px;
  flex-shrink: 0;
}
h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--navy-mid);
  margin-top: 28px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
h3::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 16px;
  background: var(--accent-light);
  border-radius: 2px;
  flex-shrink: 0;
}
.main-container > div > h3:first-child { margin-top: 0; }
h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-top: 20px;
  margin-bottom: 8px;
}

/* ── TYPOGRAPHY ── */
p { margin: 0 0 10px; color: var(--text); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; color: var(--accent-light); }
strong { font-weight: 600; }
ul, ol { margin: 0 0 12px 22px; }
li { margin-bottom: 4px; }

p code, li code:not(pre code) {
  font-family: 'DM Mono', monospace;
  font-size: 12.5px;
  background: var(--surface2);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--navy);
}

/* ── TABLES ── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 13px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 0 0 1px var(--border);
}
th {
  background: var(--navy) !important;
  color: #fff;
  padding: 10px 16px;
  text-align: left;
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 0;
}
td {
  padding: 9px 16px;
  border: 0;
  border-bottom: 1px solid var(--surface2);
  vertical-align: top;
  text-align: left;
}
tr:nth-child(even) td { background: var(--surface); }

.comment { color: #718096; font-style: italic; }

/* ── PLACEHOLDER (like the tip callout) ── */
.placeholder-section {
  background: #fffbea;
  border-left: 4px solid var(--gold);
  border-radius: 7px;
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 13.5px;
  color: #6b4a10;
  font-style: italic;
}

/* ── CALLOUT BOXES ── */
.callout {
  border-radius: 7px;
  padding: 12px 16px;
  margin: 12px 0;
  font-size: 13.5px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.callout p:last-child { margin-bottom: 0; }
.callout-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
.callout.warn { background: #fff5f5; border-left: 4px solid #d63031; color: #8b2020; }
.callout.info { background: #eef7ff; border-left: 4px solid var(--accent); color: #1a4a6e; }
.callout.tip { background: #fffbea; border-left: 4px solid var(--gold); color: #6b4a10; }
.callout code {
  font-family: 'DM Mono', monospace;
  font-size: 12.5px;
  background: rgba(0,0,0,0.06);
  padding: 1px 5px;
  border-radius: 3px;
}
html[data-theme="dark"] .callout.warn { background: #2a1416; color: #f3b1b1; }
html[data-theme="dark"] .callout.info { background: #10263a; color: #b9daf5; }
html[data-theme="dark"] .callout.tip { background: #2a2210; color: #f0d59a; }
html[data-theme="dark"] .callout code { background: rgba(255,255,255,0.08); }

/* ── EMBEDDED VIDEOS ── */
.video-embed {
  display: block;
  width: 100%;
  max-width: 800px;
  aspect-ratio: 16 / 9;
  height: auto;
  border: 0;
  border-radius: 8px;
  margin: 8px 0 12px;
  background: #000;
}

/* Links that jump to a moment in the embedded video */
.video-step { margin: -2px 0 10px; }
.video-step a {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--accent-pale);
  color: var(--accent);
}
.video-step a:hover { text-decoration: none; filter: brightness(0.97); }
html[data-theme="dark"] .video-step a { color: #9ccbee; }

/* ── OVERLAY ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 80;
}
.sidebar-overlay.open { display: block; }

/* ── MOBILE ── */
@media (max-width: 900px) {
  #menu-toggle { display: block; }
  #topbar { padding: 0 16px; gap: 10px; }
  #topbar h1 {
    font-size: 14px;
    flex: 0 1 auto;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  #topbar > nav { flex: 1 1 auto; }
  #sidebar {
    bottom: 0;
    height: auto;
    transform: translateX(-100%);
    will-change: transform;
    z-index: 200;
    padding-bottom: calc(40px + env(safe-area-inset-bottom, 0px));
  }
  #sidebar.open { transform: translateX(0); }
  .main-container { margin-left: 0; padding: 24px 14px 60px; }
  .main-container > div { padding: 22px 18px; overflow-x: auto; }
  .main-container img { max-width: 100% !important; }
  table { display: block; overflow-x: auto; }
}
@media (max-width: 480px) {
  #topbar .logo-badge { display: none; }
}

/* ── DARK MODE ── */
html[data-theme="dark"] {
  --navy: #0a1420;
  --navy-mid: #122235;
  --accent: #4a9fd4;
  --accent-light: #7cbde6;
  --accent-pale: #16324a;
  --surface: #0e141c;
  --surface2: #1f2a37;
  --border: #2a3a4d;
  --text: #d8e0e9;
  --text-muted: #9aabbd;
}
html[data-theme="dark"] .main-container > div { background: #151d27; box-shadow: 0 1px 4px rgba(0,0,0,0.4); }
html[data-theme="dark"] h2 { color: #e8eef5; }
html[data-theme="dark"] h3 { color: #c9d6e3; }
html[data-theme="dark"] #topbar .logo-badge { background: #2e7dbe; }
html[data-theme="dark"] p code, html[data-theme="dark"] li code:not(pre code) { color: #e8eef5; }
html[data-theme="dark"] td { background: #151d27; }
html[data-theme="dark"] tr:nth-child(even) td { background: #111820; }
html[data-theme="dark"] .comment { color: #9aa5b4; }
html[data-theme="dark"] .placeholder-section { background: #2a2210; color: #f0d59a; }
html[data-theme="dark"] .main-container [style*="#fafafa"],
html[data-theme="dark"] .main-container [style*="#f9f9f9"],
html[data-theme="dark"] .main-container [style*="#f2f2f2"] { background-color: #1a2430 !important; }
html[data-theme="dark"] .main-container [style*="color: #666"],
html[data-theme="dark"] .main-container [style*="color: #777"] { color: #9aabbd !important; }

        /* ── New Dark Code Container Styles ── */
        .code-container {
            position: relative;
            margin: 16px 0;
            background-color: #131314;
            border-radius: 16px;
            padding: 16px 20px 20px 20px;
            box-sizing: border-box;
        }

        .code-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 10px;
            color: #e3e3e3;
            font-size: 12px;
            font-weight: 600;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            letter-spacing: 0.5px;
            border-bottom: 1px solid #2a2a2c;
            margin-bottom: 10px;
        }

        .header-controls {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .control-btn {
            background: transparent;
            border: none;
            color: #9aa0a6;
            cursor: pointer;
            padding: 5px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: color 0.2s, background-color 0.2s;
        }

        .control-btn:hover {
            color: #ffffff;
            background-color: #202124;
        }

        .code-scroll-wrapper {
            overflow-x: auto;
            overflow-y: auto;
        }

        .code-scroll-wrapper::-webkit-scrollbar { width: 6px; height: 6px; }
        .code-scroll-wrapper::-webkit-scrollbar-track { background: #131314; }
        .code-scroll-wrapper::-webkit-scrollbar-thumb { background: #3c4043; border-radius: 10px; }
        .code-scroll-wrapper::-webkit-scrollbar-thumb:hover { background: #4f5357; }

        .code-scroll-wrapper pre {
            margin: 0;
            white-space: pre;
        }

        .code-scroll-wrapper code {
            color: #e3e3e3;
            font-size: 13px;
            line-height: 1.65;
            font-family: 'Fira Code', Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
        }

        .code-scroll-wrapper .comment {
            color: #9aa0a6;
            font-style: italic;
        }

/* Short "what it is" summary at the top of each tool section */
.tool-overview {
  background: var(--surface);
  border-left: 3px solid var(--accent-light);
  border-radius: 6px;
  padding: 10px 14px;
  margin: 0 0 14px;
}
.tool-overview strong { color: var(--navy); }
html[data-theme="dark"] .tool-overview strong { color: #e8eef5; }