/* roulang page: index */
:root {
      --bg-primary: #0b0e14;
      --bg-secondary: #121820;
      --bg-card: #161f2c;
      --border-color: rgba(255, 255, 255, 0.08);
      --accent-cyan: #00f0ff;
      --accent-amber: #ff9900;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 4px;
      width: 4px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: rgba(0, 240, 255, 0.3);
      border-radius: 2px;
    }
    .card-hover {
      transition: all 0.25s ease-in-out;
    }
    .card-hover:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-2px);
      box-shadow: 0 4px 20px rgba(0, 240, 255, 0.12);
    }
    .badge-cyan {
      background: rgba(0, 240, 255, 0.1);
      color: #00f0ff;
      border: 1px solid rgba(0, 240, 255, 0.25);
    }
    .badge-amber {
      background: rgba(255, 153, 0, 0.1);
      color: #ff9900;
      border: 1px solid rgba(255, 153, 0, 0.25);
    }

/* roulang page: article */
:root {
      --bg-primary: #0b0e14;
      --bg-secondary: #121820;
      --bg-card: #161f2c;
      --border-color: rgba(255, 255, 255, 0.08);
      --accent-cyan: #00f0ff;
      --accent-amber: #ff9900;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .card-hover {
      transition: all 0.25s ease-in-out;
    }
    .card-hover:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-2px);
      box-shadow: 0 4px 20px rgba(0, 240, 255, 0.12);
    }
    .badge-cyan {
      background: rgba(0, 240, 255, 0.1);
      color: #00f0ff;
      border: 1px solid rgba(0, 240, 255, 0.25);
    }
    .badge-amber {
      background: rgba(255, 153, 0, 0.1);
      color: #ff9900;
      border: 1px solid rgba(255, 153, 0, 0.25);
    }
    .article-body {
      color: #cbd5e1;
      line-height: 1.85;
      font-size: 1.05rem;
    }
    .article-body h2 {
      color: #ffffff;
      font-size: 1.45rem;
      font-weight: 700;
      margin-top: 2rem;
      margin-bottom: 1rem;
      padding-left: 0.75rem;
      border-left: 3px solid var(--accent-cyan);
    }
    .article-body h3 {
      color: #f1f5f9;
      font-size: 1.25rem;
      font-weight: 600;
      margin-top: 1.5rem;
      margin-bottom: 0.75rem;
    }
    .article-body p {
      margin-bottom: 1.25rem;
      text-align: justify;
    }
    .article-body blockquote {
      border-left: 4px solid var(--accent-amber);
      background: rgba(22, 31, 44, 0.7);
      padding: 1rem 1.25rem;
      margin: 1.5rem 0;
      border-radius: 0 4px 4px 0;
      color: #94a3b8;
    }
    .article-body ul, .article-body ol {
      margin: 1rem 0 1.5rem 1.5rem;
      list-style-type: square;
    }
    .article-body li {
      margin-bottom: 0.5rem;
    }
    .article-body img {
      max-width: 100%;
      border-radius: 6px;
      border: 1px solid var(--border-color);
      margin: 1.5rem auto;
    }

/* roulang page: category1 */
:root {
      --bg-primary: #0b0e14;
      --bg-secondary: #121820;
      --bg-card: #161f2c;
      --border-color: rgba(255, 255, 255, 0.08);
      --accent-cyan: #00f0ff;
      --accent-amber: #ff9900;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .card-hover {
      transition: all 0.25s ease-in-out;
    }
    .card-hover:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-2px);
      box-shadow: 0 4px 20px rgba(0, 240, 255, 0.12);
    }
    .badge-cyan {
      background: rgba(0, 240, 255, 0.1);
      color: #00f0ff;
      border: 1px solid rgba(0, 240, 255, 0.25);
    }
    .badge-amber {
      background: rgba(255, 153, 0, 0.1);
      color: #ff9900;
      border: 1px solid rgba(255, 153, 0, 0.25);
    }
    .filter-btn-active {
      background: rgba(0, 240, 255, 0.15);
      border-color: var(--accent-cyan);
      color: #00f0ff;
    }
    .hide-scrollbar::-webkit-scrollbar {
      display: none;
    }
    .hide-scrollbar {
      -ms-overflow-style: none;
      scrollbar-width: none;
    }

/* roulang page: category2 */
:root {
      --bg-primary: #0b0e14;
      --bg-secondary: #121820;
      --bg-card: #161f2c;
      --border-color: rgba(255, 255, 255, 0.08);
      --accent-cyan: #00f0ff;
      --accent-amber: #ff9900;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }
    .card-hover {
      transition: all 0.25s ease-in-out;
    }
    .card-hover:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-2px);
      box-shadow: 0 4px 20px rgba(0, 240, 255, 0.12);
    }
    .badge-cyan {
      background: rgba(0, 240, 255, 0.1);
      color: #00f0ff;
      border: 1px solid rgba(0, 240, 255, 0.25);
    }
    .badge-amber {
      background: rgba(255, 153, 0, 0.1);
      color: #ff9900;
      border: 1px solid rgba(255, 153, 0, 0.25);
    }
    .custom-scrollbar::-webkit-scrollbar {
      height: 4px;
      width: 4px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: rgba(0, 240, 255, 0.3);
      border-radius: 2px;
    }
    .custom-scrollbar::-webkit-scrollbar-track {
      background: rgba(255, 255, 255, 0.03);
    }