@charset "UTF-8";

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

/* 상단 */
.date-diff-page .utility-top {
  padding: 34px 20px 30px;
  text-align: center;
}

.date-diff-page .utility-label {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 6px 14px;
  border-radius: 999px;
  background: #eef2ff;
  color: #4338ca;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.date-diff-page .utility-title {
  margin: 0;
  font-size: clamp(34px, 4vw, 48px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: #0f172a;
}

.date-diff-page .utility-desc {
  max-width: 860px;
  margin: 18px auto 0;
  color: #64748b;
  font-size: 15px;
  line-height: 1.8;
}

/* 요약 카드 */
.diff-summary-card {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.diff-summary-item {
  padding: 22px;
  border-radius: 22px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background:
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  box-shadow:
    0 14px 36px rgba(15, 23, 42, 0.06);
}

.diff-summary-item::before {
  content: "";
  display: block;
  width: 38px;
  height: 4px;
  margin-bottom: 14px;
  border-radius: 999px;
  background:
    linear-gradient(90deg, #6366f1, #06b6d4);
}

.diff-summary-item strong {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
  font-weight: 900;
  color: #0f172a;
}

.diff-summary-item span {
  display: block;
  color: #64748b;
  font-size: 13px;
  line-height: 1.7;
}

/* 카드 */
.diff-card,
.diff-history-card {
  margin-bottom: 28px;
  padding: 30px;
  border-radius: 28px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: #ffffff;
  box-shadow:
    0 18px 48px rgba(15, 23, 42, 0.08);
}

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

.diff-card-head h2 {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #0f172a;
}

.diff-card-head p {
  margin: 0;
  color: #64748b;
  font-size: 14px;
  line-height: 1.7;
}

.diff-status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 110px;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  background: #f1f5f9;
  color: #475569;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

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

.date-input-group {
  min-width: 0;
}

.date-diff-page .utility-field-label {
  display: block;
  margin-bottom: 10px;
  color: #0f172a;
  font-size: 15px;
  font-weight: 900;
}

.date-diff-page .utility-input {
  width: 100%;
  min-height: 56px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: #ffffff;
  padding: 0 16px;
  color: #0f172a;
  font-size: 15px;
  font-weight: 700;
}

.date-diff-page .utility-input:focus {
  outline: none;
  border-color: #6366f1;
  box-shadow:
    0 0 0 4px rgba(99, 102, 241, 0.12);
}

/* 옵션 */
.diff-option-section {
  margin-top: 26px;
}

.diff-section-title {
  margin: 0 0 12px;
  color: #0f172a;
  font-size: 15px;
  font-weight: 900;
}

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

.diff-option-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 16px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background:
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  color: #334155;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
}

.diff-option-item input {
  width: 16px;
  height: 16px;
  accent-color: #6366f1;
}

/* 버튼 */
.diff-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.date-diff-page .utility-btn {
  min-height: 48px;
  padding: 0 18px;
  border-radius: 14px;
  font-size: 14px;
  font-weight: 800;
}

.date-diff-page .utility-btn-primary {
  border-color: #312e81;
  background:
    linear-gradient(135deg, #312e81, #2563eb);
  color: #ffffff;
}

.date-diff-page .utility-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 14px 28px rgba(37, 99, 235, 0.24);
}

/* 메시지 */
.diff-message-box {
  min-height: 90px;
  margin-top: 24px;
  border-radius: 22px;
  border: 1px solid rgba(99, 102, 241, 0.14);
  background:
    linear-gradient(135deg, #eef2ff, #eff6ff);
  color: #3730a3;
  line-height: 1.8;
}

/* 결과 */
.diff-result-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.diff-result-card {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border-radius: 24px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background:
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  box-shadow:
    0 10px 24px rgba(15, 23, 42, 0.05);
}

.diff-result-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 4px;
  background:
    linear-gradient(90deg, #6366f1, #06b6d4);
}

.diff-result-label {
  margin: 0 0 12px;
  color: #64748b;
  font-size: 14px;
  font-weight: 700;
}

.diff-result-value {
  display: block;
  color: #0f172a;
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.04em;
}

/* 최근 기록 */
.diff-history-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.diff-history-item {
  position: relative;
  overflow: hidden;
  padding: 22px;
  border-radius: 22px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background:
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  box-shadow:
    0 10px 24px rgba(15, 23, 42, 0.05);
}

.diff-history-item::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 4px;
  background:
    linear-gradient(90deg, #6366f1, #06b6d4);
}

.diff-history-title {
  margin: 0 0 12px;
  color: #0f172a;
  font-size: 20px;
  line-height: 1.4;
  font-weight: 900;
}

.diff-history-meta {
  margin: 0 0 18px;
  color: #64748b;
  font-size: 13px;
  line-height: 1.8;
}

.diff-history-btn {
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(148, 163, 184, 0.24);
  border-radius: 12px;
  background: #ffffff;
  color: #334155;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.diff-history-btn:hover {
  transform: translateY(-1px);
  border-color: rgba(99, 102, 241, 0.4);
  background: #eef2ff;
  color: #3730a3;
}

.diff-empty-box {
  grid-column: 1 / -1;
  padding: 40px 24px;
  border-radius: 22px;
  border: 1px dashed rgba(148, 163, 184, 0.4);
  background: #f8fafc;
  text-align: center;
  color: #64748b;
  font-size: 15px;
  line-height: 1.8;
}

.diff-clear-history-btn {
  white-space: nowrap;
}

/* 집중 모드 */
.date-diff-page.is-focus-mode {
  position: fixed;
  inset: 0;
  z-index: 9999;
  max-width: none;
  width: 100vw;
  height: 100vh;
  padding: 32px;
  overflow-y: auto;
  background:
    radial-gradient(circle at top, rgba(99, 102, 241, 0.18), transparent 36%),
    linear-gradient(180deg, #020617 0%, #0f172a 100%);
}

.date-diff-page.is-focus-mode .utility-top,
.date-diff-page.is-focus-mode .diff-summary-card,
.date-diff-page.is-focus-mode .diff-history-card,
.date-diff-page.is-focus-mode .help-panel {
  display: none;
}

.date-diff-page.is-focus-mode .diff-card {
  max-width: 980px;
  margin: 5vh auto 0;
  padding: 34px;
  border-radius: 30px;
  background: rgba(15, 23, 42, 0.94);
  border: 1px solid rgba(148, 163, 184, 0.22);
  box-shadow:
    0 30px 90px rgba(0, 0, 0, 0.45);
}

.date-diff-page.is-focus-mode .diff-card-head h2,
.date-diff-page.is-focus-mode .diff-section-title,
.date-diff-page.is-focus-mode .utility-field-label {
  color: #ffffff;
}

.date-diff-page.is-focus-mode .diff-card-head p,
.date-diff-page.is-focus-mode .diff-result-label {
  color: #cbd5e1;
}

.date-diff-page.is-focus-mode .diff-result-value {
  color: #ffffff;
}

.date-diff-page.is-focus-mode .utility-input,
.date-diff-page.is-focus-mode .diff-option-item {
  background: rgba(30, 41, 59, 0.92);
  border-color: rgba(148, 163, 184, 0.18);
  color: #e2e8f0;
}

.date-diff-page.is-focus-mode .utility-btn {
  background: rgba(30, 41, 59, 0.92);
  border-color: rgba(148, 163, 184, 0.18);
  color: #e2e8f0;
}

.date-diff-page.is-focus-mode .utility-btn:hover {
  background: rgba(51, 65, 85, 0.92);
}

.date-diff-page.is-focus-mode .utility-btn-primary {
  background:
    linear-gradient(135deg, #4338ca, #2563eb);
  color: #ffffff;
}

.date-diff-page.is-focus-mode .diff-message-box {
  background:
    linear-gradient(135deg, rgba(30, 41, 59, 0.94), rgba(15, 23, 42, 0.94));
  border-color: rgba(99, 102, 241, 0.24);
  color: #c7d2fe;
}

.date-diff-page.is-focus-mode .diff-result-card {
  background:
    linear-gradient(180deg, rgba(30, 41, 59, 0.92) 0%, rgba(15, 23, 42, 0.92) 100%);
  border-color: rgba(148, 163, 184, 0.14);
}

/* 도움말 */
.date-diff-page .help-panel {
  margin-top: 32px;
}

.date-diff-page .help-panel > h2 {
  margin: 0 0 18px;
  font-size: 30px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #0f172a;
}

.date-diff-page .help-box {
  border-radius: 24px;
}

.date-diff-page .help-toggle-box summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  list-style: none;
  font-size: 18px;
  font-weight: 800;
  color: #0f172a;
}

.date-diff-page .help-toggle-box summary::-webkit-details-marker {
  display: none;
}

.date-diff-page .help-toggle-box summary::after {
  content: "+";
  color: #64748b;
  font-size: 20px;
}

.date-diff-page .help-toggle-box[open] summary::after {
  content: "−";
}

.date-diff-page .help-toggle-content {
  margin-top: 16px;
}

.date-diff-page .help-toggle-content p {
  margin: 0;
  color: #334155;
  line-height: 1.9;
}

/* 반응형 */
@media (max-width: 1080px) {
  .diff-result-grid,
  .diff-history-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .diff-summary-card,
  .diff-input-grid,
  .diff-option-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .date-diff-page {
    padding: 0 0 28px;
  }

  .date-diff-page .utility-top {
    padding: 24px 14px 22px;
  }

  .diff-card,
  .diff-history-card {
    padding: 22px;
    border-radius: 22px;
  }

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

  .diff-result-grid,
  .diff-history-list {
    grid-template-columns: 1fr;
  }

  .diff-controls,
  .date-diff-page .utility-btn {
    width: 100%;
  }

  .date-diff-page.is-focus-mode {
    padding: 18px;
  }

  .date-diff-page.is-focus-mode .diff-card {
    margin-top: 2vh;
    padding: 22px;
  }
}