:root {
  color-scheme: light;
  --mbs-ink: #21313a;
  --mbs-muted: #64737c;
  --mbs-line: #d8e1e5;
  --mbs-soft: #f3f7f8;
  --mbs-panel: #ffffff;
  --mbs-accent: #246f86;
  --mbs-accent-dark: #184f62;
  --mbs-critical: #b24132;
  --mbs-warning: #a16413;
  --mbs-memo: #35689a;
  --mbs-ok: #2d7a4f;
}

* {
  box-sizing: border-box;
}

html {
  overflow-x: hidden;
}

body.mail-before-send-check-page {
  margin: 0;
  background: #edf3f5;
  color: var(--mbs-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: var(--mbs-accent-dark);
}

button,
input,
textarea {
  font: inherit;
}

.mbs-shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 42px;
}

.mbs-hero,
.mbs-panel,
.mbs-card,
.mbs-related,
.mbs-comments,
.mbs-ad {
  border: 1px solid var(--mbs-line);
  border-radius: 8px;
  background: var(--mbs-panel);
  box-shadow: 0 12px 28px rgba(33, 49, 58, 0.08);
}

.mbs-hero {
  padding: clamp(24px, 5vw, 48px);
}

.mbs-back {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--mbs-muted);
  font-size: 0.92rem;
  text-decoration: none;
}

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

.mbs-hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.15;
  letter-spacing: 0;
}

.mbs-lead {
  max-width: 820px;
  margin: 18px 0 0;
  color: #344953;
  font-size: clamp(1rem, 2vw, 1.15rem);
}

.mbs-notice {
  max-width: 840px;
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 4px solid #d69b32;
  border-radius: 8px;
  background: #fff7e8;
  color: #604617;
  font-weight: 700;
}

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

.mbs-policy span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid var(--mbs-line);
  border-radius: 999px;
  background: #fff;
  color: var(--mbs-muted);
  font-size: 0.88rem;
  font-weight: 800;
}

.mbs-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 16px;
  align-items: start;
}

.mbs-panel,
.mbs-card,
.mbs-related,
.mbs-comments {
  padding: clamp(18px, 3vw, 28px);
}

.mbs-panel h2,
.mbs-card h2,
.mbs-related h2 {
  margin: 0 0 14px;
  font-size: 1.35rem;
  letter-spacing: 0;
}

.mbs-field {
  display: grid;
  gap: 8px;
  margin: 0 0 14px;
  min-width: 0;
}

.mbs-field span,
.mbs-fieldset legend {
  font-weight: 800;
}

.mbs-field input,
.mbs-field textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid #cbd7dc;
  border-radius: 8px;
  background: #fff;
  color: var(--mbs-ink);
  padding: 12px 13px;
}

.mbs-field textarea {
  resize: vertical;
}

.mbs-field input:focus,
.mbs-field textarea:focus {
  border-color: var(--mbs-accent);
  outline: 3px solid rgba(36, 111, 134, 0.16);
}

.mbs-fieldset {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin: 0 0 14px;
  padding: 12px;
  border: 1px solid var(--mbs-line);
  border-radius: 8px;
  background: var(--mbs-soft);
}

.mbs-fieldset legend {
  padding: 0 4px;
}

.mbs-fieldset label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
}

.mbs-help,
.mbs-status,
.mbs-comment-note {
  margin: 8px 0 0;
  color: var(--mbs-muted);
}

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

.mbs-actions button {
  min-height: 44px;
  min-width: 0;
  border: 1px solid #b9c7cd;
  border-radius: 8px;
  background: #fff;
  color: var(--mbs-ink);
  cursor: pointer;
  font-weight: 800;
  padding: 10px 14px;
}

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

.mbs-actions button:hover,
.mbs-actions button:focus-visible {
  border-color: var(--mbs-accent-dark);
  outline: none;
}

.mbs-actions .mbs-primary:hover,
.mbs-actions .mbs-primary:focus-visible {
  background: var(--mbs-accent-dark);
}

.mbs-actions button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.mbs-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.mbs-summary div {
  min-width: 0;
  border: 1px solid var(--mbs-line);
  border-radius: 8px;
  background: var(--mbs-soft);
  padding: 12px;
  text-align: center;
}

.mbs-summary span {
  display: block;
  color: var(--mbs-muted);
  font-size: 0.86rem;
  font-weight: 800;
}

.mbs-summary strong {
  display: block;
  margin-top: 4px;
  font-size: 1.55rem;
  line-height: 1.1;
}

.mbs-result-list {
  display: grid;
  gap: 12px;
}

.mbs-result-card {
  min-width: 0;
  border: 1px solid var(--mbs-line);
  border-left-width: 5px;
  border-radius: 8px;
  background: #fff;
  padding: 14px;
}

.mbs-result-card h3 {
  margin: 8px 0 6px;
  font-size: 1.05rem;
  letter-spacing: 0;
}

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

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

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

.mbs-result-memo {
  border-left-color: var(--mbs-memo);
}

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

.mbs-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 3px 9px;
  border-radius: 999px;
  background: #e8eef2;
  color: var(--mbs-ink);
  font-size: 0.82rem;
  font-weight: 900;
}

.mbs-result-critical .mbs-badge {
  background: #fae7e3;
  color: var(--mbs-critical);
}

.mbs-result-warning .mbs-badge {
  background: #fff0d8;
  color: var(--mbs-warning);
}

.mbs-result-memo .mbs-badge {
  background: #e8f0f8;
  color: var(--mbs-memo);
}

.mbs-result-ok .mbs-badge {
  background: #e5f4eb;
  color: var(--mbs-ok);
}

.mbs-ad,
.mbs-info-grid,
.mbs-related,
.mbs-comments,
.mbs-footer {
  margin-top: 16px;
}

.mbs-ad {
  padding: 12px;
  text-align: center;
}

.mbs-ad-label {
  margin-bottom: 8px;
  color: var(--mbs-muted);
  font-size: 0.74rem;
  font-weight: 900;
}

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

.mbs-card p,
.mbs-card li,
.mbs-related span {
  color: var(--mbs-muted);
}

.mbs-card ul {
  margin: 8px 0 0;
  padding-left: 1.25rem;
}

.mbs-link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.mbs-link-grid a {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--mbs-line);
  border-radius: 8px;
  background: var(--mbs-soft);
  color: var(--mbs-ink);
  text-decoration: none;
}

.mbs-link-grid a:hover,
.mbs-link-grid a:focus-visible {
  border-color: var(--mbs-accent);
  background: #fff;
}

.mbs-link-grid strong,
.mbs-link-grid span {
  overflow-wrap: anywhere;
}

.mbs-comments {
  background: #fff;
}

.mbs-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  justify-content: space-between;
  color: var(--mbs-muted);
  font-size: 0.92rem;
}

@media (max-width: 860px) {
  .mbs-workspace,
  .mbs-info-grid,
  .mbs-link-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .mbs-shell {
    width: min(100% - 20px, 1120px);
    padding-top: 12px;
  }

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

  .mbs-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mbs-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

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