:root {
    --bg: #0b0f1a;
    --surface: #23133a;
    --surface2: #1f1232;
    --surface3: #3a1c63;
    --border: #3a1c63;
    --accent: #883CF0;
    --accent2: #af62c8;
    --accent3: #34d399;
    --danger: #f87171;
    --text: #e2e8f0;
    --muted: #c8d6e5;
    --muted2: #d6d6d6;
  }

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

  .secret-server-user-access-report-training {
    background: #191127;
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    height: 100vh;
    overflow-y: auto;
  }

  /* GRID BACKGROUND */
  .secret-server-user-access-report-training::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
      linear-gradient(rgba(56,189,248,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(56,189,248,0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    z-index: 0;
  }

  /* HEADER */
  .secret-server-user-access-report-training header {
    position: sticky;
    top: 0;
    z-index: 1;
    background: #180f26;
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.1rem;
  }

  .logo-icon {
    width: 32px; height: 32px;
    background: linear-gradient(135deg, var(--accent), #684895);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
  }

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

  .progress-bar-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.75rem;
    color: var(--muted2);
  }

  .progress-bar {
    width: 180px;
    height: 4px;
    background: #282035;
    border-radius: 99px;
    overflow: hidden;
  }

  .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #684895);
    border-radius: 99px;
    transition: width 0.5s cubic-bezier(0.4,0,0.2,1);
    width: 0%;
  }

  /* SIDEBAR NAV */
  .layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: calc(100vh - 64px);
    position: relative;
  }

  .secret-server-user-access-report-training nav {
    border-right: 1px solid var(--border);
    background: #180f26;
    position: sticky;
    top: 64px;
    height: calc(100vh - 64px);
    overflow-y: auto;
    padding: 1.5rem 0;
  }

  nav::-webkit-scrollbar { width: 4px; }
  nav::-webkit-scrollbar-track { background: transparent; }
  nav::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

  .nav-section-label {
    font-size: 0.65rem;
    color: var(--muted);
    text-transform: uppercase;
    padding: 0.75rem 1.5rem 0.4rem;
  }

  .nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.6rem 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
    border-left: 3px solid transparent;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--muted2);
    position: relative;
  }

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

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

  .nav-item .nav-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--border);
    flex-shrink: 0;
    transition: background 0.2s;
  }

  .nav-item.completed .nav-dot { background: var(--accent3); }
  .nav-item.active .nav-dot { background: var(--accent); }

  .nav-badge {
    margin-left: auto;
    font-size: 0.65rem;
    background: var(--surface3);
    color: var(--muted2);
    padding: 2px 6px;
    border-radius: 4px;
  }

  /* MAIN CONTENT */
  .secret-server-user-access-report-training main {
    padding: 3rem 4rem;
    max-width: 900px;
  }

  .section { display: none; }
  .section.active { display: block; animation: fadeIn 0.4s ease; }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* HERO SECTION */
  .hero {
    margin-bottom: 3rem;
  }

  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--accent);
    background: #23133a;
    border: 1px solid #3a1c63;
    padding: 4px 12px;
    border-radius: 99px;
    margin-bottom: 1.25rem;
  }

  h1 {
    font-weight: 800;
    font-size: 2.6rem;
    line-height: 1.1;
    margin-bottom: 1rem;
  }

  h1 em {
    font-style: normal;
    color: var(--accent);
  }

  .hero-desc {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--muted2);
    max-width: 640px;
    margin-bottom: 2rem;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
  }

  .stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
    transition: border-color 0.2s, transform 0.2s;
  }

  .stat-card:hover { border-color: var(--accent); transform: translateY(-2px); }

  .stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    display: block;
  }

  .stat-label {
    font-size: 0.7rem;
    color: var(--muted);
    text-transform: uppercase;
  }

  /* CONTENT TYPOGRAPHY */
  h2 {
    font-weight: 800;
    font-size: 1.75rem;
    margin-bottom: 1rem;
    margin-top: 2.5rem;
  }

  h3 {
    font-weight: 700;
    font-size: 1.15rem;
    margin-bottom: 0.6rem;
    margin-top: 1.5rem;
    color: var(--accent2);
  }

  p {
    line-height: 1.85;
    color: var(--muted2);
    margin-bottom: 1rem;
    font-size: 0.975rem;
  }

  strong { color: var(--text); font-weight: 600; }

  /* CALLOUT BOXES */
  .callout {
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
  }

  .callout-icon { font-size: 1.25rem; flex-shrink: 0; margin-top: 2px; }

  .callout.info { background: #1f1232; border: 1px solid #5e309d; }
  .callout.warning { background: #1f1232; border: 1px solid #5e309d; }
  .callout.success { background: #1f1232; border: 1px solid #5e309d; }
  .callout.tip { background: #1f1232; border: 1px solid #5e309d; }

  .callout p { margin: 0; font-size: 0.9rem; }
  .callout-title { font-weight: 700; font-size: 0.85rem; margin-bottom: 0.3rem; color: var(--text); }

  /* FEATURE CARDS */
  .feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1.5rem 0;
  }

  .feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    cursor: default;
    transition: all 0.25s;
    position: relative;
    overflow: hidden;
  }

  .feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    opacity: 0;
    transition: opacity 0.25s;
  }

  .feature-card:hover { border-color: #5e309d; transform: translateY(-2px); }
  .feature-card:hover::before { opacity: 1; }

  .feature-icon {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    display: block;
  }

  .feature-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 0.4rem;
  }

  .feature-desc {
    font-size: 0.82rem;
    line-height: 1.7;
    color: var(--muted2);
  }

  /* STEPS */
  .steps { margin: 1.5rem 0; }

  .step {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
    position: relative;
  }

  .step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 18px;
    top: 44px;
    bottom: -24px;
    width: 1px;
    background: var(--border);
  }

  .step-num {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--surface2);
    border: 2px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    flex-shrink: 0;
    z-index: 1;
    transition: all 0.2s;
  }

  .step:hover .step-num {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
  }

  .step-body { padding-top: 6px; }
  .step-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 0.35rem;
  }
  .step-desc { font-size: 0.85rem; color: var(--muted2); line-height: 1.7; margin: 0; }

  /* CODE / PATH */
  .path {
    font-size: 0.82rem;
    background: var(--surface2);
    border: 1px solid var(--border);
    padding: 3px 8px;
    border-radius: 6px;
    color: var(--accent2);
    white-space: nowrap;
  }

  .code-block {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.25rem;
    font-size: 0.82rem;
    color: var(--accent3);
    margin: 1rem 0;
    line-height: 1.8;
  }

  /* TABLE */
  .data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.875rem;
  }

  .data-table th {
    background: var(--surface2);
    color: var(--accent);
    font-size: 0.72rem;
    text-transform: uppercase;
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 2px solid var(--border);
  }

  .data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--muted2);
    line-height: 1.6;
  }

  .data-table tr:hover td { background: var(--surface2); }

  .badge {
    display: inline-block;
    font-size: 0.68rem;
    padding: 2px 8px;
    border-radius: 4px;
  }

  .badge.green { background: rgba(52,211,153,0.15); color: var(--accent3); border: 1px solid rgba(52,211,153,0.3); }
  .badge.blue { background: #1f1232; color: var(--accent2); border: 1px solid #3a1c63; }
  .badge.amber { background: rgba(245,158,11,0.15); color: var(--accent); border: 1px solid rgba(245,158,11,0.3); }
  .badge.red { background: rgba(248,113,113,0.15); color: var(--danger); border: 1px solid rgba(248,113,113,0.3); }

  /* QUIZ */
  .quiz-block {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    margin: 2rem 0;
  }

  .quiz-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
  }

  .quiz-tag {
    font-size: 0.68rem;
    text-transform: uppercase;
    background: rgba(167,139,250,0.15);
    color: #a78bfa;
    border: 1px solid rgba(167,139,250,0.3);
    padding: 3px 10px;
    border-radius: 99px;
  }

  .quiz-q {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text);
    margin-bottom: 1.25rem;
    line-height: 1.5;
  }

  .quiz-options { display: flex; flex-direction: column; gap: 0.6rem; }

  .quiz-option {
    background: var(--surface2);
    border: 2px solid var(--border);
    border-radius: 10px;
    padding: 0.85rem 1.1rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--muted2);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.2s;
  }

  .quiz-option:hover:not(.disabled) {
    border-color: var(--accent);
    color: var(--text);
    background: rgba(245,158,11,0.05);
  }

  .quiz-option.correct { border-color: var(--accent3); background: rgba(52,211,153,0.08); color: var(--accent3); }
  .quiz-option.wrong { border-color: var(--danger); background: rgba(248,113,113,0.08); color: var(--danger); }
  .quiz-option.disabled { cursor: not-allowed; }

  .option-letter {
    width: 28px; height: 28px;
    border-radius: 6px;
    background: var(--surface3);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.75rem;
    font-weight: 500;
    flex-shrink: 0;
  }

  .quiz-feedback {
    margin-top: 1rem;
    padding: 0.85rem 1.1rem;
    border-radius: 10px;
    font-size: 0.875rem;
    display: none;
    line-height: 1.7;
  }

  .quiz-feedback.show { display: block; }
  .quiz-feedback.correct-fb { background: rgba(52,211,153,0.1); border: 1px solid rgba(52,211,153,0.3); color: var(--accent3); }
  .quiz-feedback.wrong-fb { background: rgba(248,113,113,0.1); border: 1px solid rgba(248,113,113,0.3); color: var(--danger); }

  /* NAV BUTTONS */
  .nav-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
  }

  .btn {
    font-weight: 700;
    font-size: 0.875rem;
    padding: 0.65rem 1.5rem;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .btn-ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--muted2);
  }
  .btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

  .btn-primary {
    background: var(--accent);
    color: #0b0f1a;
  }
  .btn-primary:hover { background: #883cf0e0; transform: translateY(-1px); }

  .btn:disabled { opacity: 0.3; cursor: not-allowed; transform: none !important; }

  /* SCENARIO CARDS */
  .scenario {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1.25rem 0;
    position: relative;
    transition: border-color 0.2s;
  }
  .scenario:hover { border-color: #5e309d; }

  .scenario-label {
    position: absolute;
    top: -10px;
    left: 1.25rem;
    font-size: 0.68rem;
    text-transform: uppercase;
    background: var(--accent2);
    color: #0b0f1a;
    padding: 2px 10px;
    border-radius: 99px;
    font-weight: 500;
  }

  .scenario h4 {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 0.5rem;
  }
  .scenario p { font-size: 0.875rem; margin: 0; }

  /* COMPLETION */
  .completion-hero {
    text-align: center;
    padding: 3rem 0;
  }
  .completion-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    display: block;
    animation: pulse 2s infinite;
  }
  @keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
  }

  .cert-card {
    background: var(--surface);
    border: 2px solid var(--accent);
    border-radius: 16px;
    padding: 2.5rem;
    margin-top: 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .cert-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(179, 11, 245, 0.08), transparent 70%);
  }

  .cert-title {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
  }

  .score-display {
    font-size: 3rem;
    font-weight: 500;
    color: var(--accent3);
    margin: 1rem 0;
  }

  /* ACCORDION */
  .accordion { margin: 1rem 0; }

  .acc-item {
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    overflow: hidden;
  }

  .acc-header {
    padding: 1rem 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
    transition: background 0.2s;
    user-select: none;
  }
  .acc-header:hover { background: var(--surface2); }

  .acc-arrow {
    transition: transform 0.3s;
    color: var(--muted);
    font-size: 0.75rem;
  }

  .acc-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s cubic-bezier(0.4,0,0.2,1);
    background: var(--surface2);
  }

  .acc-body-inner {
    padding: 1rem 1.25rem;
    font-size: 0.875rem;
    color: var(--muted2);
    line-height: 1.8;
  }

  .acc-item.open .acc-arrow { transform: rotate(180deg); }
  .acc-item.open .acc-body { max-height: 400px; }

  /* TOOLTIP */
  .tooltip-wrap { position: relative; display: inline-block; }
  .tooltip-trigger {
    border-bottom: 1px dashed var(--accent);
    cursor: help;
    color: var(--accent);
  }
  .tooltip-box {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--surface3);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.6rem 0.9rem;
    width: 220px;
    font-size: 0.78rem;
    color: var(--text);
    line-height: 1.6;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 99;
    box-shadow: 0 8px 24px #291a3e;
  }
  .tooltip-wrap:hover .tooltip-box { opacity: 1; }

  /* SCROLLBAR */
  .secret-server-user-access-report-training main::-webkit-scrollbar { width: 4px; }
  .secret-server-user-access-report-training main::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

  @media (max-width: 768px) {
    .layout { grid-template-columns: 1fr; }
    .secret-server-user-access-report-training nav { position: relative; height: auto; top: 0; }
    .secret-server-user-access-report-training main { padding: 2rem 1.5rem; }
    .hero-stats { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: 1fr; }
    h1 { font-size: 1.9rem; }
  }

  ::-webkit-scrollbar { width: 6px; height: 6px; }
  ::-webkit-scrollbar-track { background: #873cf015; }
  ::-webkit-scrollbar-thumb { background: #873cf015; border-radius: 3px; }