.page-help-fab {
    position: fixed;
    right: 1.25rem;
    bottom: calc(1.25rem + env(safe-area-inset-bottom, 0px));
    z-index: 9998;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 999px;
    border: 1px solid rgba(15, 23, 42, 0.12);
    background: #fff;
    color: #2563eb;
    font-size: 1rem;
    font-weight: 700;
    font-style: italic;
    font-family: Georgia, serif;
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.12);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.page-help-fab:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.15);
}

.page-help-modal[hidden] { display: none; }

.page-help-modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

@media (min-width: 640px) {
    .page-help-modal { align-items: center; }
}

.page-help-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
}

.page-help-sheet {
    position: relative;
    width: 100%;
    max-width: 420px;
    max-height: 85vh;
    background: #fff;
    border-radius: 16px 16px 0 0;
    box-shadow: 0 -8px 32px rgba(0,0,0,0.15);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

@media (min-width: 640px) {
    .page-help-sheet { border-radius: 16px; margin: 1rem; }
}

.page-help-sheet-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid #e2e8f0;
    background: #f8fafc;
}

.page-help-sheet-header h2 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: #0f172a;
}

.page-help-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    color: #64748b;
    cursor: pointer;
    padding: 0.25rem;
}

.page-help-sheet-body {
    padding: 1.25rem;
    overflow-y: auto;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: #334155;
}

.page-help-sheet-body p { margin: 0; }