:root {
    --surface: #23133a;
    --surface2: #1f1232;
    --surface3: #883cf0e0;
    --border: #3a1c63;
    --border2: #5e309d;
    --accent: #883CF0;
    --accent2: #b33ff3;
    --accent3: #d258f8;
    --warn: #a855f7;
    --text: #c8d8f0;
    --text2: #d6d6d6;
    --text3: #d6d6d6;
    --success: #22c55e;
    --error: #ef4444;
  }

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

  html { scroll-behavior: smooth; }

  .delinea-event-pipeline-guide {
    background: #191127;
    color: var(--text);
    font-size: 15px;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
  }

  /* GRID BACKGROUND */
  .delinea-event-pipeline-guide::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(0,212,170,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(0,212,170,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
  }

  /* LAYOUT */
  .shell {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
  }

  /* SIDEBAR */
  .sidebar {
    width: 280px;
    flex-shrink: 0;
    background: #180f26;
    border-right: 1px solid var(--border);
    position: sticky;
    top: 0; left: 0; bottom: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    z-index: 1;
  }

  .sidebar::-webkit-scrollbar { width: 4px; }
  .sidebar::-webkit-scrollbar-track { background: transparent; }
  .sidebar::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

  .logo-area {
    padding: 24px 20px 20px;
    border-bottom: 1px solid var(--border);
  }

  .logo-tag {
    font-size: 10px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 6px;
  }

  .logo-title {
    
    font-size: 16px;
    font-weight: 800;
    color: var(--text);
    line-height: 1.2;
  }

  .logo-sub {
    font-size: 10px;
    color: var(--text3);
    margin-top: 4px;
  }

  .progress-bar-wrap {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
  }

  .progress-label {
    display: flex;
    justify-content: space-between;
    font-size: 10px;
    color: var(--text3);
    margin-bottom: 8px;
    text-transform: uppercase;
  }

  .progress-track {
    height: 3px;
    background: #282035;
    border-radius: 2px;
    overflow: hidden;
  }

  .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    border-radius: 2px;
    transition: width 0.4s ease;
    width: 0%;
  }

  .nav-section {
    padding: 12px 12px 4px;
  }

  .nav-section-label {
    font-size: 9px;
    font-weight: 600;
    color: var(--text3);
    text-transform: uppercase;
    padding: 0 8px;
    margin-bottom: 4px;
  }

  .nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s ease;
    margin-bottom: 1px;
    border: 1px solid transparent;
    text-decoration: none;
    color: var(--text2);
    font-size: 13px;
    font-weight: 400;
  }

  .nav-item:hover {
    background: #23133a9f;
    color: var(--text);
    border-color: var(--border);
  }

  .nav-item.active {
    background: #23133a;
    color: var(--accent);
    border-color: #3a1c63;
  }

  .nav-item.completed .nav-num {
    background: var(--success);
    color: #000;
  }

  .nav-num {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    background: var(--surface3);
    font-size: 9px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--text3);
    transition: all 0.2s;
  }

  .nav-item.active .nav-num {
    background: var(--accent);
    color: #000;
  }

  .sidebar-footer {
    margin-top: auto;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    font-size: 10px;
    color: var(--text3);
  }

  /* MAIN */
  .main {
    /* margin-left: 280px; */
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
  }

  /* TOP BAR */
  .topbar {
    position: sticky;
    top: 0;
    background: #191127;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 14px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 1;
  }

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    
    font-size: 11px;
    color: var(--text3);
  }

  .breadcrumb span { color: var(--accent); }

  .topbar-actions {
    display: flex;
    gap: 8px;
  }

  .btn {
    padding: 7px 16px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border2);
    background: var(--surface2);
    color: var(--text2);
    transition: all 0.15s;
  }

  .btn:hover { background: var(--surface3); color: var(--text); border-color: var(--border2); }

  .btn-accent {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
  }

  .btn-accent:hover { background: #883cf0e0; border-color: #3a1c63; color: #000; }

  /* SECTIONS */
  .section {
    display: none;
    padding: 48px 40px 80px;
    max-width: 960px;
    animation: fadeIn 0.3s ease;
  }

  .section.active { display: block; }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* HERO */
  .hero {
    margin-bottom: 48px;
  }

  .module-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #2a1647;
    border: 1px solid #3a1c63;
    border-radius: 20px;
    padding: 5px 12px;
    font-size: 10px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 16px;
  }

  .section-title {
    font-size: 38px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--text);
    margin-bottom: 12px;
  }

  .section-title .accent { color: var(--accent); }

  .section-subtitle {
    font-size: 16px;
    color: var(--text2);
    line-height: 1.6;
    max-width: 620px;
    font-weight: 300;
  }

  /* CONTENT COMPONENTS */
  h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
    margin: 40px 0 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
  }

  h3 {
    
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin: 24px 0 10px;
  }

  p { color: var(--text2); margin-bottom: 14px; line-height: 1.7; font-weight: 300; }
  strong { color: var(--text); font-weight: 500; }

  /* CARDS */
  .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
    margin: 20px 0;
  }

  .card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
  }

  .card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    opacity: 0;
    transition: opacity 0.2s;
  }

  .card:hover { border-color: var(--border2); transform: translateY(-2px); }
  .card:hover::before { opacity: 1; }

  .card-icon {
    font-size: 24px;
    margin-bottom: 10px;
    display: block;
  }

  .card-title {
    
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
  }

  .card-desc {
    font-size: 12px;
    color: var(--text2);
    line-height: 1.5;
    font-weight: 300;
  }

  /* STEPS */
  .steps { margin: 20px 0; }

  .step {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
    position: relative;
  }

  .step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 18px;
    top: 44px;
    bottom: -14px;
    width: 1px;
    background: var(--border);
  }

  .step-num {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: var(--surface2);
    border: 1px solid var(--border2);
    
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
  }

  .step-body { flex: 1; padding-top: 4px; }
  .step-label {  font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
  .step-desc { font-size: 13px; color: var(--text2); line-height: 1.6; font-weight: 300; }

  /* CODE BLOCKS */
  .code-block {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin: 16px 0;
    overflow: hidden;
  }

  .code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--surface3);
    border-bottom: 1px solid var(--border);
  }

  .code-lang {
    font-size: 10px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
  }

  .copy-btn {
    font-size: 10px;
    color: var(--text3);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.15s;
  }

  .copy-btn:hover { color: var(--accent); }

  code {
    display: block;
    padding: 16px;
    
    font-size: 12px;
    line-height: 1.7;
    color: #b8c9df;
    white-space: pre;
    overflow-x: auto;
  }

  code .kw { color: #ff79c6; }
  code .str { color: #f1fa8c; }
  code .cmt { color: var(--text3); font-style: italic; }
  code .fn { color: #50fa7b; }
  code .val { color: #bd93f9; }
  code .prop { color: #8be9fd; }

  /* ALERT BOXES */
  .alert {
    border-radius: 8px;
    padding: 14px 16px;
    margin: 16px 0;
    display: flex;
    gap: 12px;
    border: 1px solid;
    font-size: 13px;
    line-height: 1.5;
  }

  .alert-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }
  .alert-text { color: var(--text2); }
  .alert-text strong { display: block; margin-bottom: 2px; font-size: 13px; }

  .alert-info { background: rgba(0,153,255,0.06); border-color: rgba(0,153,255,0.2); }
  .alert-warn { background: rgba(245,166,35,0.06); border-color: rgba(245,166,35,0.2); }
  .alert-tip  { background: rgba(0,212,170,0.06); border-color: rgba(0,212,170,0.2); }
  .alert-danger { background: rgba(239,68,68,0.06); border-color: rgba(239,68,68,0.2); }

  /* PIPELINE DIAGRAM */
  .pipeline-diagram {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 28px 24px;
    margin: 20px 0;
    overflow-x: auto;
  }

  .pipeline-flow {
    display: flex;
    align-items: center;
    gap: 0;
    min-width: 700px;
  }

  .pipe-node {
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 8px;
    padding: 14px 16px;
    text-align: center;
    min-width: 120px;
    flex-shrink: 0;
    position: relative;
    transition: all 0.2s;
    cursor: pointer;
  }

  .pipe-node:hover { border-color: var(--accent); }
  .pipe-node:hover .pipe-icon { transform: scale(1.15); }

  .pipe-icon { font-size: 22px; display: block; margin-bottom: 6px; transition: transform 0.2s; }
  .pipe-label {  font-size: 11px; font-weight: 700; color: var(--text); display: block; margin-bottom: 3px; }
  .pipe-sub {  font-size: 9px; color: var(--text3); }

  .pipe-arrow {
    display: flex;
    align-items: center;
    padding: 0 6px;
    color: var(--text3);
    font-size: 18px;
    flex-shrink: 0;
  }

  .pipe-node.trigger { border-top: 2px solid var(--warn); }
  .pipe-node.filter  { border-top: 2px solid var(--accent2); }
  .pipe-node.task    { border-top: 2px solid var(--accent); }
  .pipe-node.action  { border-top: 2px solid var(--accent3); }

  /* TABLE */
  .data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 13px;
  }

  .data-table th {
    background: var(--surface2);
    padding: 10px 14px;
    text-align: left;
    font-size: 10px;
    font-weight: 600;
    color: var(--text3);
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
  }

  .data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text2);
    font-weight: 300;
    vertical-align: top;
  }

  .data-table tr:hover td { background: #1f1232; }
  .data-table tr:last-child td { border-bottom: none; }

  .tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
  }

  .tag-green { background: rgba(34,197,94,0.12); color: var(--success); }
  .tag-blue  { background: rgba(0,153,255,0.12); color: var(--accent2); }
  .tag-orange{ background: rgba(255,107,53,0.12); color: var(--accent3); }
  .tag-teal  { background: rgba(0,212,170,0.12); color: var(--accent); }

  /* QUIZ */
  .quiz-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 28px;
    margin: 24px 0;
  }

  .quiz-title {
    
    font-size: 14px;
    font-weight: 700;
    color: var(--warn);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .quiz-q {
    font-size: 15px;
    color: var(--text);
    margin-bottom: 16px;
    font-weight: 400;
    line-height: 1.5;
  }

  .quiz-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
  }

  .quiz-opt {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: 7px;
    border: 1px solid var(--border);
    background: var(--surface2);
    cursor: pointer;
    transition: all 0.15s;
    font-size: 13px;
    color: var(--text2);
    font-weight: 300;
  }

  .quiz-opt:hover { border-color: var(--border2); color: var(--text); }
  .quiz-opt.selected { border-color: var(--accent); background: rgba(0,212,170,0.07); color: var(--accent); }
  .quiz-opt.correct  { border-color: #77b255;
    background: #77b25520;
    color: #60c090; }
  .quiz-opt.wrong    { border-color: #dc143c;
    background: #dc143c2b;
    color:#ff7a90;
  }

  .quiz-opt-mark {
    width: 18px; height: 18px;
    border-radius: 50%;
    border: 1.5px solid var(--border2);
    flex-shrink: 0;
    transition: all 0.15s;
    display: flex; align-items: center; justify-content: center;
    font-size: 10px;
  }

  .quiz-opt.selected .quiz-opt-mark { border-color: var(--accent); background: var(--accent); color: #000; }
  .quiz-opt.correct .quiz-opt-mark  { border-color: #77b255;
    background: #77b25520;
    color: #60c090; }
  .quiz-opt.wrong .quiz-opt-mark    { border-color: #dc143c;
    background: #dc143c2b;
    color:#ff7a90; }

  .quiz-feedback {
    padding: 12px 14px;
    border-radius: 7px;
    font-size: 13px;
    line-height: 1.5;
    display: none;
  }

  .quiz-feedback.show { display: block; }
  .quiz-feedback.correct-fb {  background: #77b25520;
    border: 1px solid #77b255;
    color: #60c090; }
  .quiz-feedback.wrong-fb   { background: #dc143c2b;
    border: 1px solid #dc143c;
    color: #ff7a90; }

  /* COMPLETION BANNER */
  .completion-banner {
    background: linear-gradient(135deg, #3a1c63, #684895);
    border: 1px solid #3a1c63;
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    margin-top: 40px;
  }

  .completion-icon { font-size: 48px; margin-bottom: 12px; }
  .completion-title {  font-size: 24px; font-weight: 800; color: var(--text); margin-bottom: 8px; }
  .completion-sub   { color: var(--text2); font-size: 14px; font-weight: 300; }

  /* NAV FOOTER */
  .section-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 56px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
  }

  .section-nav .btn { padding: 10px 20px; font-size: 12px; }

  /* CHECKLIST */
  .checklist {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 16px 0;
  }

  .check-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 14px;
    border-radius: 7px;
    background: var(--surface);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.15s;
    font-size: 13px;
    color: var(--text2);
    user-select: none;
  }

  .check-item:hover { border-color: var(--border2); }
  .check-item.checked { border-color: rgba(34,197,94,0.3); }

  .check-box {
    width: 18px; height: 18px;
    border: 1.5px solid var(--border2);
    border-radius: 4px;
    flex-shrink: 0;
    margin-top: 1px;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.15s;
    font-size: 10px;
  }

  .check-item.checked .check-box { background: var(--success); border-color: var(--success); color: #000; }
  .check-item.checked .check-text { color: var(--text3); text-decoration: line-through; }

  /* TWO COL */
  .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 16px 0; }

  @media (max-width: 768px) {
    .sidebar { display: none; }
    .main { margin-left: 0; }
    .section { padding: 32px 20px 60px; }
    .two-col { grid-template-columns: 1fr; }
    .topbar { padding: 12px 20px; }
  }

  /* SCROLL TO TOP */
  .scroll-top {
    position: absolute;
    bottom: 28px; right: 28px;
    width: 40px; height: 40px;
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    font-size: 16px;
    color: var(--text2);
    transition: all 0.15s;
    z-index: 1;
    opacity: 0;
    pointer-events: none;
  }
  .scroll-top.visible { opacity: 1; pointer-events: all; }
  .scroll-top:hover { border-color: var(--accent); color: var(--accent); }

  /* HIGHLIGHT */
  .highlight { color: var(--accent); font-weight: 500; }
  .mono-inline {
    
    font-size: 11px;
    background: var(--surface2);
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: 3px;
    color: var(--accent2);
  }

  /* Architecture diagram */
  .arch-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 16px 0;
  }

  .arch-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
  }

  .arch-item-label {
    font-size: 9px;
    color: var(--text3);
    text-transform: uppercase;
    margin-bottom: 6px;
  }

  .arch-item-title {
    
    font-size: 13px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 4px;
  }

  .arch-item-desc {
    font-size: 11px;
    color: var(--text2);
    line-height: 1.5;
    font-weight: 300;
  }


  /* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #873cf015; }
::-webkit-scrollbar-thumb { background: #873cf015; border-radius: 3px; }