chunyu_prject_react/src/pages/DateCalculator/DateCalculator.css

.date-calculator-page {
  min-height: 100vh;
  background: #f0f2f5;
}

.date-calculator-hero {
  min-height: 200px;
  background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 50%, #3b82f6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 40px 20px;
}

.date-calculator-hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 40%);
  animation: dcHeroLight 8s ease-in-out infinite alternate;
}

@keyframes dcHeroLight {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-20px, -10px); }
}

.date-calculator-hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.dc-particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  animation: dcFloat 6s ease-in-out infinite;
}

.dc-particle-1 { width: 50px; height: 50px; top: 15%; left: 8%; animation-delay: 0s; }
.dc-particle-2 { width: 35px; height: 35px; top: 65%; left: 18%; animation-delay: 1s; }
.dc-particle-3 { width: 65px; height: 65px; top: 25%; right: 12%; animation-delay: 2s; }
.dc-particle-4 { width: 25px; height: 25px; top: 70%; right: 25%; animation-delay: 0.5s; }
.dc-particle-5 { width: 40px; height: 40px; top: 45%; left: 45%; animation-delay: 1.5s; }
.dc-particle-6 { width: 30px; height: 30px; bottom: 20%; left: 30%; animation-delay: 3s; }

@keyframes dcFloat {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
  50% { transform: translateY(-18px) scale(1.1); opacity: 0.6; }
}

.date-calculator-hero-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.date-calculator-hero-icon {
  width: 64px;
  height: 64px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
  margin-bottom: 16px;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.date-calculator-hero-title {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin: 0;
  letter-spacing: 2px;
}

.dc-title-row {
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.dc-hero-fav {
  display: flex;
  align-items: center;
}

.date-calculator-container {
  max-width: 1100px;
  margin: -30px auto 0;
  padding: 0 20px 60px;
  position: relative;
  z-index: 2;
}

.dc-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.dc-back-btn {
  border-radius: 8px;
  font-weight: 500;
  color: #64748b;
  border-color: #e2e8f0;
}

.dc-back-btn:hover {
  color: #8b5cf6;
  border-color: #8b5cf6;
}

.dc-timezone-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  background: #fff;
  border-radius: 10px;
  padding: 10px 16px;
  border: 1px solid #e8ecf1;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.dc-timezone-label {
  font-size: 13px;
  font-weight: 600;
  color: #334155;
  white-space: nowrap;
}

.dc-timezone-select {
  min-width: 220px;
}

.dc-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.dc-panel {
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  border: 1px solid #e8ecf1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.3s ease;
}

.dc-panel:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.dc-panel-header {
  padding: 12px 16px;
  border-bottom: 1px solid #f1f5f9;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fafbfc;
}

.dc-panel-title {
  font-size: 14px;
  font-weight: 600;
  color: #334155;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dc-panel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #cbd5e1;
  transition: background 0.3s ease;
}

.dc-panel-dot.input-dot {
  background: #8b5cf6;
}

.dc-panel-dot.output-dot {
  background: #10b981;
}

.dc-panel-body {
  flex: 1;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.dc-input-area {
  width: 100%;
  padding: 14px 16px;
  font-family: "JetBrains Mono", "Fira Code", "Consolas", monospace;
  font-size: 15px;
  line-height: 1.6;
  background: #1e1e2e;
  color: #a6e3a1;
  border: 2px solid #2a2a3e;
  border-radius: 10px;
  outline: none;
  transition: border-color 0.3s ease;
  box-sizing: border-box;
}

.dc-input-area::placeholder {
  color: #6c7086;
}

.dc-input-area:focus {
  border-color: #8b5cf6;
}

.dc-date-picker {
  width: 100%;
}

.dc-date-picker .ant-picker {
  width: 100%;
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 14px;
}

.dc-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.dc-badge-seconds {
  background: #ede9fe;
  color: #7c3aed;
}

.dc-badge-milliseconds {
  background: #dbeafe;
  color: #2563eb;
}

.dc-mode-toggle {
  display: flex;
  gap: 0;
}

.dc-mode-toggle .ant-btn:first-child {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.dc-mode-toggle .ant-btn:last-child {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  margin-left: -1px;
}

.dc-results {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dc-result-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
  border: 1px solid #e8ecf1;
  border-radius: 10px;
  padding: 10px 14px;
  transition: all 0.2s ease;
  animation: dcFadeIn 0.3s ease;
}

.dc-result-item:hover {
  background: #f1f5f9;
  border-color: #c7d2fe;
}

@keyframes dcFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.dc-result-label {
  font-size: 12px;
  font-weight: 600;
  color: #64748b;
  min-width: 80px;
  flex-shrink: 0;
}

.dc-result-value {
  font-family: "JetBrains Mono", "Fira Code", "Consolas", monospace;
  font-size: 13px;
  color: #1e293b;
  word-break: break-all;
  flex: 1;
  margin: 0 12px;
}

.dc-result-copy {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 6px;
  border: 1px solid #e2e8f0;
  background: #fff;
  color: #94a3b8;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: all 0.2s ease;
  padding: 0;
}

.dc-result-copy:hover {
  color: #8b5cf6;
  border-color: #c4b5fd;
  background: #f5f3ff;
}

.dc-result-copy.copied {
  color: #10b981;
  border-color: #6ee7b7;
  background: #ecfdf5;
}

.dc-empty-hint {
  text-align: center;
  padding: 40px 16px;
  color: #94a3b8;
  font-size: 14px;
}

.dc-empty-hint-icon {
  font-size: 36px;
  color: #cbd5e1;
  margin-bottom: 12px;
}

.dc-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.dc-action-btn {
  height: 48px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.dc-action-get {
  background: linear-gradient(135deg, #8b5cf6, #6366f1) !important;
  border: none !important;
  color: #fff !important;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
}

.dc-action-get:hover {
  box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45) !important;
}

.dc-action-clear {
  background: #fff !important;
  color: #ef4444 !important;
  border-color: #ef4444 !important;
}

.dc-action-clear:hover {
  background: #fef2f2 !important;
}

@media (max-width: 768px) {
  .date-calculator-hero {
    min-height: 120px;
    padding: 24px 16px;
  }

  .date-calculator-hero-icon {
    width: 48px;
    height: 48px;
    font-size: 22px;
    margin-bottom: 12px;
  }

  .date-calculator-hero-title {
    font-size: 20px;
    letter-spacing: 1px;
  }

  .dc-title-row {
    gap: 8px;
  }

  .date-calculator-container {
    padding: 0 12px 40px;
    margin-top: -20px;
  }

  .dc-toolbar {
    flex-direction: column;
    align-items: stretch;
    margin-bottom: 12px;
  }

  .dc-back-btn {
    width: 100%;
    justify-content: center;
  }

  .dc-timezone-bar {
    flex-wrap: wrap;
    padding: 8px 12px;
    gap: 8px;
    margin-bottom: 12px;
  }

  .dc-timezone-label {
    font-size: 12px;
  }

  .dc-timezone-select {
    min-width: 0;
    flex: 1;
  }

  .dc-panels {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 16px;
  }

  .dc-panel-header {
    padding: 10px 12px;
  }

  .dc-panel-title {
    font-size: 13px;
  }

  .dc-panel-body {
    padding: 12px;
    gap: 12px;
  }

  .dc-input-area {
    font-size: 16px;
    padding: 12px;
  }

  .dc-date-picker .ant-picker {
    padding: 8px 12px;
    font-size: 14px;
  }

  .dc-result-item {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 12px;
  }

  .dc-result-label {
    min-width: 0;
    font-size: 13px;
  }

  .dc-result-value {
    margin: 0;
    width: 100%;
    font-size: 14px;
    word-break: break-all;
    padding: 8px;
    background: #f1f5f9;
    border-radius: 6px;
    order: 0;
  }

  .dc-result-copy {
    align-self: flex-end;
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .dc-mode-toggle {
    flex-shrink: 0;
  }

  .dc-mode-toggle .ant-btn {
    padding: 4px 12px;
    font-size: 12px;
  }

  .dc-empty-hint {
    padding: 24px 12px;
    font-size: 13px;
  }

  .dc-empty-hint-icon {
    font-size: 28px;
    margin-bottom: 8px;
  }

  .dc-actions {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 16px;
  }

  .dc-action-btn {
    height: 52px;
    font-size: 16px;
    border-radius: 10px;
  }
}

/* ===== Dark Mode ===== */
[data-theme="dark"] .date-calculator-page {
  background: #0f172a;
}

[data-theme="dark"] .dc-panel {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .dc-panel:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .dc-panel-header {
  background: rgba(139, 92, 246, 0.08);
  border-color: #334155;
}

[data-theme="dark"] .dc-panel-title {
  color: #f1f5f9;
}

[data-theme="dark"] .dc-panel-dot {
  background: #475569;
}

[data-theme="dark"] .dc-back-btn {
  color: #94a3b8 !important;
  border-color: #334155 !important;
}

[data-theme="dark"] .dc-back-btn:hover {
  color: #8b5cf6 !important;
  border-color: #8b5cf6 !important;
}

[data-theme="dark"] .dc-timezone-bar {
  background: #1e293b;
  border-color: #334155;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .dc-timezone-label {
  color: #f1f5f9;
}

[data-theme="dark"] .dc-result-item {
  background: rgba(30, 41, 59, 0.6);
  border-color: #334155;
}

[data-theme="dark"] .dc-result-item:hover {
  background: rgba(139, 92, 246, 0.1);
  border-color: #8b5cf6;
}

[data-theme="dark"] .dc-result-label {
  color: #94a3b8;
}

[data-theme="dark"] .dc-result-value {
  color: #f1f5f9;
  background: rgba(51, 65, 85, 0.5);
}

[data-theme="dark"] .dc-result-copy {
  background: #1e293b;
  border-color: #334155;
  color: #94a3b8;
}

[data-theme="dark"] .dc-result-copy:hover {
  color: #8b5cf6;
  border-color: #8b5cf6;
  background: rgba(139, 92, 246, 0.1);
}

[data-theme="dark"] .dc-result-copy.copied {
  color: #10b981;
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.1);
}

[data-theme="dark"] .dc-badge-seconds {
  background: rgba(139, 92, 246, 0.15);
  color: #a78bfa;
}

[data-theme="dark"] .dc-badge-milliseconds {
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
}

[data-theme="dark"] .dc-empty-hint-icon {
  color: #475569;
}

[data-theme="dark"] .dc-action-clear {
  background: #1e293b !important;
  color: #f87171 !important;
  border-color: #f87171 !important;
}

[data-theme="dark"] .dc-action-clear:hover {
  background: rgba(239, 68, 68, 0.1) !important;
}