.page-layout {
            display: grid;
            grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
            gap: 2rem;
            align-items: flex-start;
        }

        .toc-panel {
            position: sticky;
            top: 88px;
            align-self: start;
            padding: 1.4rem 1.35rem;
            background: rgba(4, 7, 9, 0.96);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 24px;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
        }

        .toc-drawer {
            border-radius: 18px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.08);
            background: rgba(4, 7, 9, 0.98);
        }

        .toc-drawer summary {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.2rem;
            font-size: 0.95rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--mb-green);
            cursor: pointer;
            list-style: none;
        }

        .toc-drawer summary::-webkit-details-marker {
            display: none;
        }

        .toc-drawer summary::after {
            content: '\25BE';
            transition: transform 0.25s ease;
            margin-left: 1rem;
        }

        .toc-drawer[open] summary::after {
            transform: rotate(180deg);
        }

        .toc-drawer nav {
            max-height: calc(100vh - 220px);
            overflow-y: auto;
            padding: 0.75rem 0 1rem;
        }

        .toc-drawer nav ul {
            margin: 0;
            padding: 0 1rem;
            list-style: none;
            display: grid;
            gap: 0.6rem;
        }

        .toc-drawer nav a {
            display: block;
            padding: 0.65rem 0.9rem;
            border-radius: 14px;
            color: var(--mb-text);
            background: rgba(255, 255, 255, 0.03);
            transition: background 0.25s ease, transform 0.2s ease;
        }

        .toc-drawer nav a:hover,
        .toc-drawer nav a:focus {
            background: rgba(126, 245, 216, 0.14);
            transform: translateX(2px);
        }

        .toc-drawer nav a:focus-visible {
            outline: 2px solid rgba(126, 245, 216, 0.6);
            outline-offset: 2px;
        }

        .page-content {
            min-width: 0;
        }

        .protagonist-intro {
            padding-top: 1.25rem;
        }

        .protagonist-intro .intro-content {
            width: min(100%, 74ch);
            margin-right: auto;
            margin-left: auto;
        }

        .protagonist-intro h2,
        .protagonist-intro h3 {
            width: 100%;
            margin-right: 0;
            margin-left: 0;
            text-align: left;
        }

        .protagonist-intro p,
        .protagonist-intro .intro-description {
            max-width: 100%;
            text-align: justify;
            text-align-last: left;
            hyphens: auto;
            overflow-wrap: break-word;
        }

        .protagonist-intro .center-image {
            width: min(100%, clamp(220px, 48vw, 420px));
            height: auto;
            max-height: min(68vh, 540px);
            margin: 1.35rem auto;
            border-radius: 16px;
            object-fit: contain;
            box-shadow:
                0 18px 42px rgba(0, 0, 0, 0.34),
                0 0 22px rgba(126, 245, 216, 0.12);
        }

        .protagonist-intro .center-image[src*="mbnightmare"] {
            width: min(100%, clamp(280px, 68vw, 680px));
            max-height: min(62vh, 430px);
        }

        @media (max-width: 900px) {
            .page-layout {
                grid-template-columns: 1fr;
            }

            .toc-panel {
                position: sticky;
                top: 58px;
                z-index: 20;
                margin-bottom: 0.9rem;
                padding: 0.35rem;
            }

            .toc-drawer {
                border-radius: 14px;
            }

            .toc-drawer summary {
                min-height: 42px;
                padding: 0.65rem 0.85rem;
                font-size: 0.82rem;
            }

            .toc-drawer nav {
                max-height: min(24vh, 160px);
                padding: 0.35rem 0 0.55rem;
            }

            .toc-drawer nav ul {
                gap: 0.35rem;
                padding: 0 0.55rem;
            }

            .toc-drawer nav a {
                padding: 0.45rem 0.62rem;
                border-radius: 10px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 768px) {
            .protagonist-intro {
                padding-top: 1rem;
            }

            .protagonist-intro .intro-content {
                width: min(100%, 68ch);
            }

            .protagonist-intro .center-image {
                width: min(100%, clamp(210px, 76vw, 360px));
                max-height: min(62vh, 470px);
                margin: 1.15rem auto;
                border-radius: 14px;
            }

            .protagonist-intro .center-image[src*="mbnightmare"] {
                width: min(100%, 92vw);
                max-height: min(54vh, 340px);
            }
        }

        @media (max-width: 480px) {
            .protagonist-intro {
                padding-top: 0.75rem;
            }

            .protagonist-intro p,
            .protagonist-intro .intro-description {
                text-align: justify;
                text-align-last: left;
            }

            .protagonist-intro .center-image {
                width: min(100%, 82vw);
                max-height: min(58vh, 390px);
                margin: 1rem auto;
            }

            .protagonist-intro .center-image[src*="mbnightmare"] {
                width: min(100%, 94vw);
                max-height: min(48vh, 300px);
            }
        }