.manual-shell {
    min-height: 100vh;
    background: #101820;
    color: #f8fafc;
    font-family: "Nunito", "Segoe UI", Arial, sans-serif;
}

.manual-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 22px clamp(18px, 4vw, 46px);
    background: rgba(255,255,255,.06);
    border-bottom: 1px solid rgba(255,255,255,.1);
}

.manual-topbar h1 {
    margin: 0;
    font-weight: 900;
}

.manual-topbar p {
    margin: 4px 0 0;
    color: #bfd1dd;
}

.manual-top-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.manual-layout {
    display: grid;
    grid-template-columns: 310px minmax(0, 1fr);
    gap: 24px;
    padding: 24px clamp(18px, 4vw, 46px) 36px;
}

.manual-index {
    align-self: start;
    position: sticky;
    top: 20px;
    padding: 18px;
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 8px;
    background: rgba(255,255,255,.07);
}

.manual-index h2 {
    font-size: 18px;
    font-weight: 900;
}

.manual-index nav {
    display: grid;
    gap: 8px;
}

.manual-index button {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    min-height: 42px;
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 8px;
    background: rgba(255,255,255,.08);
    color: #f8fafc;
    font-weight: 800;
    text-align: left;
}

.manual-search {
    position: relative;
    margin-bottom: 14px;
}

.manual-search i {
    position: absolute;
    top: 50%;
    left: 13px;
    transform: translateY(-50%);
    color: #6b7f8f;
}

.manual-search input {
    width: 100%;
    min-height: 42px;
    padding-left: 38px;
    border: 0;
    border-radius: 8px;
}

.manual-reader {
    min-width: 0;
}

.manual-book {
    margin: 0 auto;
}

.manual-page {
    background: #f8f3e7;
    color: #1f2933;
    border: 1px solid #d8cdbb;
    overflow: hidden;
}

.manual-page-inner {
    height: 100%;
    padding: 34px;
    position: relative;
    background: linear-gradient(90deg, rgba(0,0,0,.05), transparent 10%, transparent 92%, rgba(0,0,0,.05));
    overflow-y: auto;
    scrollbar-color: #b09a7e #f1e7d3;
    scrollbar-width: thin;
}

.manual-page-inner::-webkit-scrollbar {
    width: 9px;
}

.manual-page-inner::-webkit-scrollbar-track {
    background: #f1e7d3;
}

.manual-page-inner::-webkit-scrollbar-thumb {
    background: #b09a7e;
    border-radius: 999px;
}

.manual-page-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
    color: #1f6f78;
}

.manual-page-heading h2 {
    margin: 0;
    font-size: 27px;
    font-weight: 900;
}

.manual-page-content {
    font-size: 15px;
    line-height: 1.65;
    padding-bottom: 48px;
}

.manual-page-content p,
.manual-page-content li,
.manual-page-content td {
    overflow-wrap: anywhere;
}

.manual-page-content table {
    table-layout: fixed;
}

.manual-page-content h2,
.manual-page-content h3 {
    color: #172033;
    font-weight: 900;
}

.manual-page-number {
    position: sticky;
    bottom: 16px;
    display: block;
    margin-left: auto;
    right: 28px;
    color: #7a6955;
    font-size: 12px;
    font-weight: 900;
    width: max-content;
}

.manual-cover-page,
.manual-back-cover {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
}

.manual-cover-page h1,
.manual-back-cover h2 {
    font-size: 42px;
    font-weight: 900;
    color: #1f6f78;
}

.manual-badge,
.manual-tip,
.manual-alert {
    margin-top: 16px;
    padding: 12px 14px;
    border-radius: 8px;
    font-weight: 800;
}

.manual-badge,
.manual-tip {
    background: #e7f6ef;
    color: #166345;
}

.manual-alert {
    background: #fff1d6;
    color: #7c4a03;
}

.manual-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.manual-table th,
.manual-table td {
    border: 1px solid #d8cdbb;
    padding: 8px;
    vertical-align: top;
}

.manual-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
}

.manual-zoomed .manual-reader {
    transform: scale(1.08);
    transform-origin: top center;
}

.language-switch-form {
    display: inline-flex;
    gap: 2px;
    padding: 3px;
    border-radius: 999px;
    background: rgba(255,255,255,.9);
}

.language-switch-form button {
    min-width: 38px;
    height: 32px;
    border: 0;
    border-radius: 999px;
    background: transparent;
    color: #172033;
    font-weight: 900;
}

.language-switch-form button.active {
    background: #1f6f78;
    color: #fff;
}

@media (max-width: 991.98px) {
    .manual-topbar,
    .manual-top-actions {
        align-items: flex-start;
        flex-direction: column;
    }

    .manual-layout {
        grid-template-columns: 1fr;
    }

    .manual-index {
        position: static;
    }
}

@media (max-width: 575.98px) {
    .manual-page-inner {
        padding: 24px 20px;
    }

    .manual-controls {
        flex-direction: column;
    }
}