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

    :root {
      --bg-primary: #0f1419;
      --bg-secondary: #1a1f28;
      --bg-card: #242b36;
      --border: #2f3845;
      --accent: #7c6ef5;
      --accent-hover: #6d5fe6;
      --text-primary: #f8fafc;
      --text-secondary: #94a3b8;
      --text-muted: #64748b;
      --success: #10b981;
      --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    body {
      font-family: 'Inter', sans-serif;
      background: var(--bg-primary);
      color: var(--text-primary);
      min-height: 100vh;
      padding: 40px 20px;
      line-height: 1.6;
    }

    .container {
      max-width: 900px;
      margin: 0 auto;
    }

    /* Header */
    header {
      text-align: center;
      margin-bottom: 60px;
    }

    header h1 {
      font-size: clamp(2rem, 5vw, 3rem);
      font-weight: 700;
      margin-bottom: 12px;
      background: linear-gradient(135deg, var(--accent), #a78bfa);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    header p {
      color: var(--text-secondary);
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto;
    }

    /* Section Titles */
    .section {
      margin-bottom: 60px;
    }

    .section-title {
      font-size: 1.5rem;
      font-weight: 600;
      margin-bottom: 24px;
      color: var(--text-primary);
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .section-title::before {
      content: '';
      width: 4px;
      height: 24px;
      background: var(--accent);
      border-radius: 2px;
    }

    /* Basic Accordion */
    .accordion {
      background: var(--bg-secondary);
      border: 1px solid var(--border);
      border-radius: 12px;
      overflow: hidden;
    }

    .accordion-item {
      border-bottom: 1px solid var(--border);
    }

    .accordion-item:last-child {
      border-bottom: none;
    }

    .accordion-header {
      width: 100%;
      padding: 20px 24px;
      background: transparent;
      border: none;
      color: var(--text-primary);
      font-size: 1rem;
      font-weight: 600;
      text-align: left;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all var(--transition);
      font-family: inherit;
    }

    .accordion-header:hover {
      background: rgba(124, 110, 245, 0.05);
    }

    .accordion-header.active {
      color: var(--accent);
      background: rgba(124, 110, 245, 0.08);
    }

    .accordion-icon {
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: transform var(--transition);
      font-size: 1.2rem;
      color: var(--text-muted);
    }

    .accordion-header.active .accordion-icon {
      transform: rotate(180deg);
      color: var(--accent);
    }

    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height var(--transition), padding var(--transition);
    }

    .accordion-content.active {
      max-height: 500px;
      padding: 0 24px 20px;
    }

    .accordion-body {
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.8;
    }

    /* Styled Accordion */
    .accordion-styled .accordion-item {
      background: var(--bg-card);
      border-radius: 10px;
      margin-bottom: 12px;
      border: 1px solid var(--border);
      overflow: hidden;
    }

    .accordion-styled .accordion-item:last-child {
      margin-bottom: 0;
    }

    .accordion-styled .accordion-header {
      padding: 18px 20px;
    }

    /* Icon Variants */
    .accordion-plus .accordion-icon::before {
      content: '+';
      font-size: 1.5rem;
      font-weight: 300;
    }

    .accordion-plus .accordion-header.active .accordion-icon::before {
      content: '−';
    }

    .accordion-plus .accordion-header.active .accordion-icon {
      transform: rotate(0deg);
    }

    /* With Numbers */
    .accordion-numbered .accordion-header {
      display: grid;
      grid-template-columns: auto 1fr auto;
      gap: 16px;
    }

    .accordion-number {
      width: 32px;
      height: 32px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(124, 110, 245, 0.1);
      border-radius: 8px;
      color: var(--accent);
      font-size: 0.9rem;
      font-weight: 700;
    }

    /* FAQ Style */
    .accordion-faq {
      background: transparent;
      border: none;
    }

    .accordion-faq .accordion-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      margin-bottom: 16px;
      transition: all var(--transition);
    }

    .accordion-faq .accordion-item:hover {
      border-color: var(--accent);
      box-shadow: 0 4px 20px rgba(124, 110, 245, 0.15);
    }

    .accordion-faq .accordion-header {
      padding: 24px;
      font-size: 1.05rem;
    }

    .accordion-faq .accordion-content.active {
      padding: 0 24px 24px;
    }

    /* Code Block */
    .code-section {
      background: var(--bg-secondary);
      border: 1px solid var(--border);
      border-radius: 12px;
      padding: 24px;
      margin-top: 40px;
    }

    .code-section h3 {
      font-size: 1.1rem;
      margin-bottom: 16px;
      color: var(--text-primary);
    }

    .code-block {
      background: #1e1e1e;
      border-radius: 8px;
      padding: 20px;
      overflow-x: auto;
      position: relative;
    }

    .code-block code {
      font-family: 'Courier New', monospace;
      font-size: 0.85rem;
      color: #d4d4d4;
      line-height: 1.6;
    }

    .copy-btn {
      position: absolute;
      top: 12px;
      right: 12px;
      padding: 6px 12px;
      background: var(--accent);
      color: white;
      border: none;
      border-radius: 6px;
      font-size: 0.75rem;
      cursor: pointer;
      transition: background var(--transition);
    }

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

    /* Responsive */
    @media (max-width: 640px) {
      .accordion-header {
        padding: 16px 18px;
        font-size: 0.95rem;
      }

      .accordion-content.active {
        padding: 0 18px 16px;
      }

      .accordion-faq .accordion-header {
        padding: 20px 18px;
      }
    }