.btn {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 9px 18px;
      border-radius: var(--radius);
      font-size: 13.5px;
      font-weight: 500;
      cursor: pointer;
      text-decoration: none;
      transition: opacity .15s, transform .1s;
      border: none;
      font-family: inherit;
    }

.btn-primary {
      background: var(--accent);
      color: #fff;
    }

.btn-primary:hover {
      opacity: .86;
    }

.feature-card {
      background: var(--surface);
      padding: 32px 28px 36px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), background 0.2s, border-color 0.2s, box-shadow 0.3s;
    }

.feature-card:hover {
      background: #1b1b1b;
      border-color: var(--accent-border);
      transform: translateY(-5px);
      box-shadow: 0 12px 30px -10px rgba(59, 130, 246, 0.15);
    }

.card-icon {
      width: 20px;
      height: 20px;
      color: var(--accent);
      display: block;
      margin-bottom: 16px;
    }

.step {
      display: grid;
      grid-template-columns: 36px 1fr;
      gap: 18px;
      padding: 26px 0;
    }

.step + .step {
      border-top: 1px solid var(--border);
    }

.cmd-wrapper {
      position: relative;
    }

.cmd-box {
      background: #000;
      border: 1px solid #333;
      border-radius: 6px;
      padding: 12px 42px 12px 14px;
      font-family: 'SF Mono', 'Fira Code', monospace;
      font-size: 11.5px;
      color: #9ecb9e;
      overflow-x: auto;
      white-space: pre;
    }

.copy-btn {
      position: absolute;
      top: 50%;
      right: 6px;
      transform: translateY(-50%);
      background: transparent;
      border: none;
      color: #666;
      width: 28px;
      height: 28px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      border-radius: 4px;
      transition: all .2s;
    }

.copy-btn:hover {
      background: #222;
      color: #fff;
    }

.copy-btn svg {
      width: 14px;
      height: 14px;
    }

.arch-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 24px 32px;
      transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.2s, box-shadow 0.3s;
    }

.arch-card:hover {
      border-color: var(--accent-border);
      transform: translateY(-5px);
      box-shadow: 0 12px 30px -10px rgba(59, 130, 246, 0.15);
    }

.prereq-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 24px 32px;
      transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.2s, box-shadow 0.3s;
    }

.prereq-card:hover {
      border-color: var(--accent-border);
      transform: translateY(-5px);
      box-shadow: 0 12px 30px -10px rgba(59, 130, 246, 0.15);
    }

.faq-item {
      border-top: 1px solid var(--border);
      padding: 24px 28px;
      transition: background .15s;
    }

.faq-item:hover {
      background: #131313;
    }

.faq-q {
      font-size: 14px;
      font-weight: 500;
      color: #fff;
      margin-bottom: 6px;
    }

.faq-a {
      font-size: 13.5px;
      color: var(--muted);
      line-height: 1.65;
    }

.changelog-item {
      display: grid;
      grid-template-columns: 140px 1fr;
      gap: 20px;
      padding: 24px 0;
    }

.changelog-item + .changelog-item {
      border-top: 1px solid var(--border);
    }

@media (max-width: 620px) {
  .changelog-item {
        grid-template-columns: 1fr;
        gap: 8px;
      }
}

.changelog-meta {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

.changelog-tag {
      display: inline-flex;
      align-items: center;
      width: fit-content;
      font-size: 10.5px;
      font-weight: 500;
      color: var(--accent);
      background: var(--accent-dim);
      border: 1px solid var(--accent-border);
      border-radius: 20px;
      padding: 2px 9px;
    }

.version-current {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      background: var(--surface);
      border: 1px solid var(--accent-border);
      border-radius: var(--radius);
      padding: 20px 24px;
      margin-bottom: 32px;
    }