.contrast-checker-page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 8px 0 40px;
}

/* 상단 */

.contrast-checker-page .utility-top {
  text-align: center;
  padding: 30px 20px 28px;
}

.contrast-checker-page .utility-label {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 6px 13px;
  border-radius: 999px;
  background: #ecfeff;
  color: #155e75;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.contrast-checker-page .utility-title {
  margin: 0;
  font-size: clamp(32px, 4vw, 44px);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: #0f172a;
}

.contrast-checker-page .utility-desc {
  max-width: 820px;
  margin: 16px auto 0;
  color: #64748b;
  font-size: 15px;
  line-height: 1.8;
}

/* 요약 카드 */

.contrast-summary-card {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.contrast-summary-item {
  padding: 20px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 20px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.06);
}

.contrast-summary-item::before {
  content: "";
  display: block;
  width: 34px;
  height: 4px;
  margin-bottom: 14px;
  border-radius: 999px;
  background: linear-gradient(90deg, #06b6d4, #2563eb);
}

.contrast-summary-item strong {
  display: block;
  margin-bottom: 7px;
  font-size: 15px;
  font-weight: 900;
  color: #0f172a;
}

.contrast-summary-item span {
  font-size: 13px;
  color: #64748b;
  line-height: 1.6;
}

/* 카드 공통 */

.contrast-editor-card,
.contrast-result-card {
  padding: 28px;
  margin-bottom: 24px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: 24px;
  background: #ffffff;
  box-shadow: 0 18px 48px rgba(15, 23, 42, 0.08);
}

/* 카드 헤더 */

.contrast-card-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 24px;
}

.contrast-card-head h2 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #0f172a;
}

.contrast-card-head p {
  margin: 0;
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
}

/* 상단 버튼 */

.contrast-head-actions {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  min-width: 360px;
}

.contrast-head-actions .utility-btn {
  white-space: nowrap;
  flex: 0 0 auto;
}

.contrast-action-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* 입력 영역 */

.contrast-input-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.contrast-input-box .utility-field-label {
  display: block;
  margin-bottom: 10px;
  font-weight: 800;
  color: #0f172a;
}

.contrast-color-row {
  display: flex;
  gap: 10px;
}

.contrast-color-picker {
  width: 58px;
  height: 50px;
  padding: 4px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 14px;
  background: #ffffff;
  cursor: pointer;
  flex-shrink: 0;
}

.contrast-color-row .utility-input {
  flex: 1;
  min-height: 50px;
  font-weight: 800;
  font-family: Consolas, Monaco, "Courier New", monospace;
}

/* 미리보기 */

.contrast-preview-box {
  margin-top: 24px;
  padding: 34px;
  border-radius: 24px;
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: #ffffff;
  color: #111827;
  transition:
    background 0.2s ease,
    color 0.2s ease;
}

.contrast-preview-box span {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  font-size: 13px;
  font-weight: 800;
}

.contrast-preview-box strong {
  display: block;
  margin-bottom: 10px;
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 900;
  letter-spacing: -0.04em;
}

.contrast-preview-box p {
  max-width: 720px;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

/* 버튼 */

.contrast-action-row {
  margin-top: 22px;
}

.contrast-checker-page .utility-btn {
  min-height: 46px;
  padding: 0 20px;
  border-radius: 14px;
  font-weight: 800;
}

.contrast-checker-page .utility-btn-primary {
  background: linear-gradient(135deg, #0f172a, #164e63);
  color: #ffffff;
  border-color: #0f172a;
}

.contrast-checker-page .utility-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.18);
}

/* 상태 배지 */

.contrast-status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 82px;
  padding: 8px 13px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
}

.contrast-status-badge.is-ready {
  color: #475569;
  background: #f1f5f9;
}

.contrast-status-badge.is-success {
  color: #047857;
  background: #d1fae5;
}

.contrast-status-badge.is-error {
  color: #b91c1c;
  background: #fee2e2;
}

/* 점수 카드 */

.contrast-score-card {
  padding: 28px;
  border-radius: 24px;
  background: linear-gradient(135deg, #ecfeff, #eff6ff);
  border: 1px solid rgba(6, 182, 212, 0.2);
  text-align: center;
}

.contrast-score-card span {
  display: block;
  margin-bottom: 10px;
  color: #155e75;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.contrast-score-card strong {
  display: block;
  margin-bottom: 10px;
  color: #0f172a;
  font-size: clamp(42px, 6vw, 64px);
  font-weight: 900;
  letter-spacing: -0.05em;
}

.contrast-score-card p {
  margin: 0;
  color: #475569;
  font-size: 14px;
  line-height: 1.7;
}

/* 결과 패널 */

.contrast-pass-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.contrast-pass-item {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: #f8fafc;
}

.contrast-pass-item strong {
  display: block;
  margin-bottom: 8px;
  color: #0f172a;
  font-size: 14px;
  font-weight: 900;
}

.contrast-pass-item span {
  display: block;
  margin-bottom: 12px;
  color: #64748b;
  font-size: 13px;
}

.contrast-pass-item em {
  display: inline-flex;
  padding: 5px 10px;
  border-radius: 999px;
  background: #e2e8f0;
  color: #475569;
  font-size: 12px;
  font-style: normal;
  font-weight: 900;
}

.contrast-pass-item.is-pass {
  background: #ecfdf5;
  border-color: rgba(16, 185, 129, 0.24);
}

.contrast-pass-item.is-pass em {
  background: #d1fae5;
  color: #047857;
}

.contrast-pass-item.is-fail {
  background: #fef2f2;
  border-color: rgba(239, 68, 68, 0.24);
}

.contrast-pass-item.is-fail em {
  background: #fee2e2;
  color: #b91c1c;
}

/* 결과 박스 */

.contrast-result-box {
  min-height: 160px;
  max-height: 420px;
  margin-top: 20px;
  padding: 22px;
  border-radius: 18px;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: auto;
  line-height: 1.8;
  font-size: 14px;
  font-family:
    Consolas,
    Monaco,
    "SFMono-Regular",
    "Courier New",
    monospace;
}

.contrast-result-box.is-ready {
  border: 1px solid rgba(148, 163, 184, 0.24);
  background: #f8fafc;
  color: #64748b;
}

.contrast-result-box.is-success {
  border: 1px solid rgba(6, 182, 212, 0.28);
  background: #ecfeff;
  color: #155e75;
}

.contrast-result-box.is-error {
  border: 1px solid rgba(239, 68, 68, 0.28);
  background: #fef2f2;
  color: #991b1b;
}

/* 도움말 */

.contrast-checker-page .help-panel {
  margin-top: 30px;
}

.contrast-checker-page .help-panel > h2 {
  margin: 0 0 18px;
  font-size: 28px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #0f172a;
}

.contrast-checker-page .help-box {
  border-radius: 22px;
}

/* 반응형 */

@media (max-width: 900px) {

  .contrast-input-grid,
  .contrast-pass-grid {
    grid-template-columns: 1fr;
  }

  .contrast-card-head {
    grid-template-columns: 1fr;
  }

  .contrast-head-actions {
    min-width: 0;
    width: 100%;
    flex-wrap: wrap;
    justify-content: flex-start;
  }
}

@media (max-width: 768px) {

  .contrast-checker-page {
    padding: 0 0 28px;
  }

  .contrast-checker-page .utility-top {
    padding: 24px 14px 22px;
  }

  .contrast-summary-card {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .contrast-editor-card,
  .contrast-result-card {
    padding: 22px;
    border-radius: 20px;
  }

  .contrast-head-actions,
  .contrast-action-row,
  .contrast-color-row {
    width: 100%;
    flex-direction: column;
  }

  .contrast-head-actions .utility-btn,
  .contrast-action-row .utility-btn {
    width: 100%;
  }

  .contrast-color-picker {
    width: 100%;
  }

  .contrast-preview-box {
    padding: 24px;
  }

  .contrast-checker-page .utility-title {
    font-size: 32px;
  }
}