:root {
    --shell-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shell-shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shell-shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
}

.site-home,
.manual-page {
    position: relative;
    min-height: 100vh;
}

.site-home::before,
.manual-page::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(circle at top right, rgba(229, 9, 20, 0.14), transparent 26rem),
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.1), transparent 22rem),
        linear-gradient(180deg, rgba(248, 250, 252, 0.98), rgba(255, 255, 255, 0.96) 32%, rgba(241, 245, 249, 0.88) 100%);
}

.site-header,
.manual-header {
    background: rgba(255, 255, 255, 0.9) !important;
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.85);
    box-shadow: var(--shell-shadow-sm);
}

.site-home #main,
.manual-main {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.34) 20%, rgba(248, 250, 252, 0.68) 100%);
}

.manual-page-hero {
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(226, 232, 240, 0.92);
    border-radius: 24px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.94)),
        linear-gradient(120deg, rgba(229, 9, 20, 0.08), rgba(37, 99, 235, 0.06));
    box-shadow: var(--shell-shadow-lg);
    padding: 1.75rem;
}

.manual-page-hero::after {
    content: '';
    position: absolute;
    top: -4rem;
    right: -3rem;
    width: 12rem;
    height: 12rem;
    border-radius: 9999px;
    background: radial-gradient(circle, rgba(229, 9, 20, 0.14), transparent 68%);
    pointer-events: none;
}

.manual-page-hero__eyebrow {
    display: inline-flex;
    margin-bottom: 0.875rem;
    padding: 0.35rem 0.75rem;
    border-radius: 9999px;
    background: rgba(229, 9, 20, 0.08);
    color: #e50914;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.manual-sidebar-panel {
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: 20px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.97), rgba(248, 250, 252, 0.94)),
        linear-gradient(180deg, rgba(229, 9, 20, 0.02), rgba(37, 99, 235, 0.02));
    box-shadow: var(--shell-shadow-md);
}

.manual-reading-surface {
    border: 1px solid rgba(226, 232, 240, 0.9);
    border-radius: 24px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.96)),
        linear-gradient(145deg, rgba(229, 9, 20, 0.02), rgba(37, 99, 235, 0.02));
    box-shadow: var(--shell-shadow-md);
}

.manual-footer {
    background: #0f172a;
    border-top: 1px solid rgba(51, 65, 85, 0.85);
}

@media (min-width: 640px) {
    .manual-page-hero {
        padding: 2.25rem;
    }
}