:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #4338ca;
            --dark: #1e293b;
            --light: #f8fafc;
            --gray: #64748b;
            --success: #10b981;
            --warning: #f59e0b;
            --error: #ef4444;
            --border-radius: 12px;
            --shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
            --card-bg: #ffffff;
            --body-bg: #f1f5f9;
            --text-color: #1e293b;
        }

        @media (prefers-color-scheme: dark) {
            :root {
                --dark: #f8fafc;
                --light: #1e293b;
                --gray: #94a3b8;
                --card-bg: #1e293b;
                --body-bg: #0f172a;
                --text-color: #f8fafc;
            }
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        .main-container {
            background-color: var(--body-bg);
            color: var(--text-color);
            line-height: 1.6;
            min-height: 100vh;
            padding: 20px;
            transition: var(--transition);
        }

        .container {
            width: 95%;
            margin: 0 auto;
        }

        .header-title {
            text-align: center;
            padding: 40px 20px;
        }

        h1 {
            font-size: 2.8rem;
            margin-bottom: 15px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            font-weight: 800;
        }

        .subtitle {
            font-size: 1.2rem;
            color: var(--gray);
            max-width: 700px;
            margin: 0 auto 30px;
        }

        .main-content {
            display: grid;
            grid-template-columns: 1fr;
            gap: 30px;
            margin-bottom: 40px;
        }

        .converter-card {
            background-color: var(--card-bg);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 30px;
            transition: var(--transition);
        }

        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
        }

        .card-title {
            font-size: 1.5rem;
            color: var(--primary);
            font-weight: 600;
        }

        .card-icon {
            font-size: 1.8rem;
            color: var(--primary);
        }

        .converter-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        @media (max-width: 768px) {
            .converter-grid {
                grid-template-columns: 1fr;
            }
        }

        .input-group {
            margin-bottom: 20px;
        }

        .input-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--text-color);
        }

        .input-field {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--gray);
            border-radius: 8px;
            font-size: 1rem;
            background-color: var(--body-bg);
            color: var(--text-color);
            transition: var(--transition);
        }

        .input-field:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
        }

        .btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn i {
            margin-right: 8px;
        }

        .btn-secondary {
            background-color: var(--gray);
        }

        .btn-secondary:hover {
            background-color: #475569;
        }

        .btn-group {
            display: flex;
            gap: 10px;
            margin-top: 15px;
        }

        .calculator {
            margin-top: 30px;
        }

        .calculator-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 10px;
            margin-top: 15px;
        }

        .calculator-btn {
            padding: 15px;
            font-size: 1.2rem;
            border-radius: 8px;
            border: none;
            background-color: var(--body-bg);
            color: var(--text-color);
            cursor: pointer;
            transition: var(--transition);
        }

        .calculator-btn:hover {
            background-color: var(--primary);
            color: white;
        }

        .calculator-btn.operator {
            background-color: var(--warning);
            color: white;
        }

        .calculator-btn.clear {
            background-color: var(--error);
            color: white;
        }

        .calculator-btn.equals {
            background-color: var(--success);
            color: white;
            grid-column: span 2;
        }

        .history-section {
            margin-top: 30px;
        }

        .history-title {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            color: var(--gray);
        }

        .history-items {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .history-item {
            padding: 12px 15px;
            background-color: var(--body-bg);
            border-radius: 8px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .history-item-content {
            font-family: 'Courier New', monospace;
        }

        .history-item-delete {
            color: var(--error);
            cursor: pointer;
        }

        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 40px 0;
        }

        .feature-card {
            background-color: var(--card-bg);
            padding: 25px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-5px);
        }

        .feature-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .feature-card h3 {
            margin-bottom: 10px;
            color: var(--text-color);
        }

        .feature-card p {
            color: var(--gray);
        }

        .info-text {
            background-color: rgba(37, 99, 235, 0.1);
            padding: 20px;
            border-radius: var(--border-radius);
            margin: 30px 0;
            border-left: 4px solid var(--primary);
        }

        .notification {
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 25px;
            background-color: var(--success);
            color: white;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            transform: translateX(150%);
            transition: transform 0.3s ease;
            z-index: 1000;
        }

        .notification.show {
            transform: translateX(0);
        }

        .theme-toggle {
            position: fixed;
            bottom: 20px;
            right: 20px;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: var(--shadow);
            z-index: 100;
        }

        

        @media (max-width: 600px) {
            h1 {
                font-size: 2.2rem;
            }
            
            .converter-card {
                padding: 20px;
            }
            
            .calculator-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }


 /* ===== ARTICLE SPECIFIC STYLES - NO BODY STYLES ===== */
 #binary-guide-article {
      width: 95%;
      margin: 0 auto;
      padding: 2rem 1.5rem 3rem 1.5rem;
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    }

    /* Hero Section */
    .binary-guide-hero {
      text-align: center;
      margin-bottom: 2.5rem;
      padding: 2rem 1.5rem;
      background: linear-gradient(135deg, #2563eb 0%, #4338ca 100%);
      border-radius: 32px;
      box-shadow: 0 12px 30px rgba(37, 99, 235, 0.3);
    }

    .binary-guide-hero h2 {
      font-size: 2.6rem;
      font-weight: 800;
      color: white;
      margin-bottom: 1rem;
      letter-spacing: -0.02em;
      font-family: 'Montserrat', serif;
    }

    .binary-guide-hero .binary-hero-sub {
      font-size: 1.2rem;
      color: rgba(255, 255, 255, 0.9);
      max-width: 720px;
      margin: 0 auto;
      line-height: 1.5;
    }

    .binary-guide-meta {
      display: flex;
      justify-content: center;
      gap: 2rem;
      color: rgba(255, 255, 255, 0.8);
      font-weight: 500;
      margin-top: 1.2rem;
      flex-wrap: wrap;
    }

    .binary-guide-meta span i {
      margin-right: 0.5rem;
    }

    /* Main Content */
    .binary-main-content {
      background: white;
      border-radius: 28px;
      padding: 2rem 2rem 2.5rem 2rem;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
      border: 1px solid rgba(37, 99, 235, 0.15);
    }

    .binary-main-content h2 {
      font-size: 1.8rem;
      font-weight: 700;
      margin-top: 2rem;
      margin-bottom: 1rem;
      color: #2563eb;
      border-left: 5px solid #4338ca;
      padding-left: 1rem;
      font-family: 'Montserrat', serif;
    }

    .binary-main-content h2:first-of-type {
      margin-top: 0;
    }

    .binary-main-content h3 {
      font-size: 1.35rem;
      font-weight: 600;
      margin: 1.5rem 0 0.75rem 0;
      color: #4338ca;
    }

    .binary-main-content p {
      font-size: 1.05rem;
      color: #2d3748;
      margin-bottom: 1.2rem;
      line-height: 1.6;
    }

    .binary-main-content ul, .binary-main-content ol {
      margin: 1rem 0 1.2rem 1.8rem;
      color: #2d3748;
      line-height: 1.6;
    }

    .binary-main-content li {
      margin-bottom: 0.5rem;
    }

    .binary-highlight-box {
      background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(67, 56, 202, 0.05));
      border-left: 6px solid #4338ca;
      padding: 1.25rem 1.5rem;
      border-radius: 20px;
      margin: 1.75rem 0;
    }

    .binary-pro-tip {
      background: rgba(67, 56, 202, 0.1);
      border-radius: 20px;
      padding: 1.2rem 1.5rem;
      margin: 1.5rem 0;
      display: flex;
      gap: 1rem;
      align-items: flex-start;
      border: 1px solid rgba(37, 99, 235, 0.3);
    }

    .binary-pro-tip i {
      font-size: 1.8rem;
      color: #4338ca;
    }

    .binary-stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.2rem;
      margin: 2rem 0;
    }

    .binary-stat-card {
      background: #f8f9fa;
      border-radius: 20px;
      padding: 1.2rem;
      text-align: center;
      transition: all 0.2s;
      border: 1px solid rgba(37, 99, 235, 0.2);
    }

    .binary-stat-card .stat-number {
      font-size: 2rem;
      font-weight: 800;
      color: #2563eb;
      margin-bottom: 0.25rem;
    }

    .binary-quote-block {
      background: #f8f9fa;
      padding: 1.5rem;
      border-radius: 24px;
      text-align: center;
      font-style: italic;
      margin: 1.5rem 0;
      border: 1px solid rgba(37, 99, 235, 0.2);
    }

    .binary-quote-block i {
      font-size: 2rem;
      color: #4338ca;
      margin-bottom: 0.5rem;
      display: inline-block;
    }

    .binary-table-wrapper {
      overflow-x: auto;
      margin: 1.5rem 0;
    }

    .binary-conversion-table {
      width: 100%;
      border-collapse: collapse;
      background: #f8f9fa;
      border-radius: 16px;
      overflow: hidden;
    }

    .binary-conversion-table th, .binary-conversion-table td {
      padding: 12px 16px;
      text-align: left;
      border-bottom: 1px solid rgba(37, 99, 235, 0.2);
    }

    .binary-conversion-table th {
      background: rgba(37, 99, 235, 0.1);
      font-weight: 600;
      color: #2563eb;
    }

    .binary-conversion-table tr:hover {
      background: rgba(67, 56, 202, 0.05);
    }

    .binary-formula-card {
      background: #f8f9fa;
      border-radius: 16px;
      padding: 1.2rem;
      margin: 1rem 0;
      text-align: center;
      border: 1px solid rgba(37, 99, 235, 0.2);
    }

    .binary-formula {
      font-family: 'Courier New', monospace;
      font-size: 1.2rem;
      font-weight: 700;
      color: #2563eb;
      background: white;
      display: inline-block;
      padding: 0.5rem 1rem;
      border-radius: 12px;
      margin: 0.5rem 0;
    }

    .binary-footer-note {
      margin-top: 2.5rem;
      text-align: center;
      font-size: 0.85rem;
      color: #718096;
      border-top: 1px solid #e2e8f0;
      padding-top: 2rem;
    }

    @media (max-width: 768px) {
      .binary-guide-hero h2 {
        font-size: 2rem;
      }
      .binary-main-content {
        padding: 1.5rem;
      }
      #binary-guide-article {
        padding: 1rem;
      }
    }