:root {
    color-scheme: light;
    --spbc-ink: #1b2430;
    --spbc-muted: #5c6977;
    --spbc-line: #d7e2ec;
    --spbc-panel: #ffffff;
    --spbc-soft: #f5f9fc;
    --spbc-accent: #2667d8;
    --spbc-accent-dark: #184fae;
    --spbc-critical: #b42318;
    --spbc-warning: #a15c00;
    --spbc-memo: #2f5f91;
    --spbc-ok: #28704d;
    --spbc-radius: 8px;
}

* {
    box-sizing: border-box;
}

body.sns-post-before-check-page {
    margin: 0;
    color: var(--spbc-ink);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.75;
    background:
        linear-gradient(180deg, #f6fbff 0%, #ffffff 42%, #f7fafc 100%);
}

.spbc-shell {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    padding: 28px 0 40px;
}

.spbc-hero,
.spbc-panel,
.spbc-card,
.spbc-related,
.spbc-comments,
.spbc-ad {
    border: 1px solid var(--spbc-line);
    border-radius: var(--spbc-radius);
    background: var(--spbc-panel);
}

.spbc-hero {
    padding: 26px;
    box-shadow: 0 14px 38px rgba(27, 36, 48, 0.08);
}

.spbc-back {
    display: inline-flex;
    margin-bottom: 12px;
    color: var(--spbc-accent-dark);
    font-weight: 700;
    text-decoration: none;
}

.spbc-kicker {
    margin: 0 0 8px;
    color: var(--spbc-accent-dark);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
}

.spbc-hero h1 {
    margin: 0;
    font-size: clamp(1.75rem, 3vw, 2.55rem);
    line-height: 1.12;
    letter-spacing: 0;
}

.spbc-lead,
.spbc-notice,
.spbc-help,
.spbc-card p,
.spbc-card li,
.spbc-comment-note,
.spbc-footer {
    color: var(--spbc-muted);
}

.spbc-lead {
    margin: 16px 0 0;
    font-size: 1.02rem;
}

.spbc-notice {
    margin: 14px 0 0;
    padding: 14px;
    border-radius: var(--spbc-radius);
    background: var(--spbc-soft);
}

.spbc-policy {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0;
}

.spbc-policy span {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 5px 10px;
    border: 1px solid var(--spbc-line);
    border-radius: 999px;
    background: #fff;
    color: var(--spbc-muted);
    font-size: 0.78rem;
    font-weight: 800;
}

.spbc-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: 16px;
    align-items: start;
}

.spbc-panel,
.spbc-card,
.spbc-related,
.spbc-comments,
.spbc-ad {
    padding: 20px;
}

.spbc-panel h2,
.spbc-card h2,
.spbc-related h2 {
    margin: 0 0 12px;
    font-size: 1.28rem;
    line-height: 1.35;
    letter-spacing: 0;
}

.spbc-field {
    display: grid;
    gap: 6px;
    margin: 14px 0;
    font-weight: 700;
}

.spbc-field span,
.spbc-check span {
    color: var(--spbc-ink);
}

.spbc-field textarea,
.spbc-field select {
    width: 100%;
    max-width: 100%;
    border: 1px solid var(--spbc-line);
    border-radius: var(--spbc-radius);
    background: #fff;
    color: var(--spbc-ink);
    font: inherit;
}

.spbc-field textarea {
    min-height: 230px;
    padding: 12px;
    resize: vertical;
}

.spbc-field select {
    min-height: 44px;
    padding: 8px 10px;
}

.spbc-field-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.spbc-check {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    margin: 12px 0;
    font-weight: 700;
}

.spbc-check input {
    width: 18px;
    height: 18px;
    margin-top: 0.35em;
}

.spbc-help {
    margin: 10px 0 0;
    font-size: 0.94rem;
}

.spbc-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}

.spbc-actions button {
    min-height: 44px;
    padding: 9px 13px;
    border: 1px solid var(--spbc-line);
    border-radius: var(--spbc-radius);
    background: #fff;
    color: var(--spbc-ink);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.spbc-actions button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.spbc-actions .spbc-primary {
    border-color: var(--spbc-accent);
    background: var(--spbc-accent);
    color: #fff;
}

.spbc-actions .spbc-primary:hover {
    background: var(--spbc-accent-dark);
}

.spbc-status {
    min-height: 1.8em;
    margin: 12px 0 0;
    color: var(--spbc-muted);
    font-weight: 700;
}

.spbc-summary {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    margin: 12px 0 16px;
}

.spbc-summary div {
    min-width: 0;
    padding: 10px;
    border: 1px solid var(--spbc-line);
    border-radius: var(--spbc-radius);
    background: var(--spbc-soft);
    text-align: center;
}

.spbc-summary span,
.spbc-summary strong {
    display: block;
}

.spbc-summary span {
    color: var(--spbc-muted);
    font-size: 0.78rem;
    font-weight: 800;
}

.spbc-summary strong {
    color: var(--spbc-ink);
    font-size: 1.45rem;
    line-height: 1.2;
}

.spbc-result-list {
    display: grid;
    gap: 10px;
}

.spbc-result-card {
    padding: 14px;
    border: 1px solid var(--spbc-line);
    border-left-width: 5px;
    border-radius: var(--spbc-radius);
    background: #fff;
}

.spbc-result-card h3 {
    margin: 8px 0 4px;
    font-size: 1.02rem;
    line-height: 1.4;
    letter-spacing: 0;
}

.spbc-result-card p {
    margin: 0;
    color: var(--spbc-muted);
}

.spbc-result-critical {
    border-left-color: var(--spbc-critical);
}

.spbc-result-warning {
    border-left-color: var(--spbc-warning);
}

.spbc-result-memo,
.spbc-result-empty {
    border-left-color: var(--spbc-memo);
}

.spbc-result-ok {
    border-left-color: var(--spbc-ok);
}

.spbc-badge {
    display: inline-flex;
    padding: 3px 8px;
    border-radius: 999px;
    background: var(--spbc-soft);
    color: var(--spbc-muted);
    font-size: 0.78rem;
    font-weight: 800;
}

.spbc-info-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.spbc-card ul {
    margin: 0;
    padding-left: 1.2em;
}

.spbc-ad {
    margin-top: 16px;
    min-height: 120px;
}

.spbc-ad-label {
    margin-bottom: 8px;
    color: var(--spbc-muted);
    font-size: 0.75rem;
    font-weight: 800;
}

.spbc-related,
.spbc-comments {
    margin-top: 16px;
}

.spbc-link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 10px;
}

.spbc-link-grid a {
    display: grid;
    gap: 4px;
    min-width: 0;
    padding: 12px;
    border: 1px solid var(--spbc-line);
    border-radius: var(--spbc-radius);
    background: var(--spbc-soft);
    color: var(--spbc-accent-dark);
    text-decoration: none;
}

.spbc-link-grid span {
    color: var(--spbc-muted);
    font-size: 0.92rem;
}

.spbc-comments {
    background: #fff;
}

.spbc-comment-note {
    margin: 0 0 14px;
}

.spbc-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 18px;
    justify-content: space-between;
    margin-top: 20px;
    font-size: 0.95rem;
}

.spbc-footer a,
.spbc-link-grid strong,
.spbc-back {
    overflow-wrap: anywhere;
}

@media (max-width: 820px) {
    .spbc-workspace,
    .spbc-info-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .spbc-shell {
        width: min(100% - 20px, 1120px);
        padding-top: 16px;
    }

    .spbc-hero,
    .spbc-panel,
    .spbc-card,
    .spbc-related,
    .spbc-comments,
    .spbc-ad {
        padding: 16px;
    }

    .spbc-hero h1 {
        font-size: 1.85rem;
    }

    .spbc-field-row,
    .spbc-summary {
        grid-template-columns: 1fr;
    }

    .spbc-actions button {
        width: 100%;
    }
}