/* Extracted from guide.html — keep in sync if structure changes. */
        .guide-hero {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(139, 92, 246, 0.05));
            border-bottom: 1px solid var(--border-color);
            padding: 4rem 0;
            text-align: center;
        }
        .guide-hero h1 { font-size: 2.2rem; margin-bottom: 0.5rem; }
        .guide-hero .guide-meta { color: var(--muted-text); font-size: 0.9rem; }
        .guide-hero .guide-meta .cat-badge {
            display: inline-block; padding: 0.2rem 0.8rem; border-radius: 20px;
            font-size: 0.8rem; font-weight: 600; margin-left: 0.5rem;
            background: rgba(0,212,255,0.12); color: var(--primary-color);
        }

        .guide-content {
            max-width: 780px;
            margin: 3rem auto;
            padding: 0 1.5rem;
            line-height: 1.9;
            color: var(--light-text);
            font-size: 1rem;
        }
        .guide-content h2 {
            font-size: 1.6rem;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            color: var(--primary-color);
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 0.5rem;
        }
        .guide-content h3 {
            font-size: 1.25rem;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            color: var(--light-text);
        }
        .guide-content p { margin-bottom: 1.2rem; }
        .guide-content ul, .guide-content ol {
            margin-bottom: 1.2rem;
            padding-left: 1.5rem;
        }
        .guide-content li { margin-bottom: 0.4rem; }
        .guide-content code {
            background: rgba(0,212,255,0.08);
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-color);
        }
        .guide-content blockquote {
            border-left: 3px solid var(--primary-color);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: rgba(0,212,255,0.03);
            border-radius: 0 8px 8px 0;
            color: var(--muted-text);
            font-style: italic;
        }
        .guide-content img {
            max-width: 100%;
            border-radius: 10px;
            margin: 1.5rem 0;
        }

        /* Guide-specific boxes */
        .guide-section {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 1.5rem 2rem;
            margin: 2rem 0;
        }
        .guide-tip-box {
            background: rgba(0,212,255,0.05);
            border: 1px solid rgba(0,212,255,0.15);
            border-radius: 10px;
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
        }
        .guide-tip-box strong { color: var(--primary-color); }

        .guide-loading {
            text-align: center;
            padding: 4rem 2rem;
            color: var(--muted-text);
            font-size: 1rem;
        }
        .guide-error {
            text-align: center;
            padding: 4rem 2rem;
            color: #ff6b6b;
        }
        .guide-error a { color: var(--primary-color); }

        .guide-back {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            color: var(--primary-color);
            text-decoration: none;
            font-size: 0.9rem;
            margin-bottom: 2rem;
        }
        .guide-back:hover { text-decoration: underline; }