* {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: #f9fafb;
  color: #111827;
}

input:focus,
select:focus,
button:focus {
  outline: 2px solid #10b981;
  outline-offset: 2px;
}

.panel {
  background-color: #ffffff;
  border-radius: 0.75rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 3px 12px rgba(15, 23, 42, 0.03);
}

.tab-btn-active {
  background-color: #088d61;
  color: #ffffff;
  border-color: #088d61;
}

.tab-btn-inactive {
  background-color: #ffffff;
  color: #374151;
  border-color: #e5e7eb;
}

.clock-card {
  background: linear-gradient(135deg, #ffffff 0%, #f9fafb 100%);
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  padding: 1.25rem;
  transition: all 0.2s ease;
}

.clock-card:hover {
  border-color: #10b981;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.1);
}

.time-display {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 2rem;
  font-weight: 700;
  color: #10b981;
}

.city-name {
  font-size: 1.125rem;
  font-weight: 600;
  color: #111827;
}

.timezone-info {
  font-size: 0.875rem;
  color: #6b7280;
}

.day-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.day-indicator.day {
  background-color: #fef3c7;
  color: #92400e;
}

.day-indicator.night {
  background-color: #dbeafe;
  color: #1e40af;
}

.meeting-timeline {
  display: grid;
  grid-template-columns: repeat(24, 1fr);
  gap: 2px;
  margin: 1rem 0;
  height: 40px;
}

.hour-block {
  border-radius: 2px;
  transition: all 0.2s;
}

.hour-block.work {
  background-color: #10b981;
}

.hour-block.sleep {
  background-color: #1e40af;
}

.hour-block.off {
  background-color: #e5e7eb;
}

.hour-block.overlap {
  background-color: #f59e0b;
}

.info-card {
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
  border-left: 4px solid #10b981;
  padding: 1rem;
  border-radius: 0.5rem;
  margin: 1rem 0;
}

@media (max-width: 640px) {
  .time-display {
    font-size: 1.5rem;
  }
  
  .city-name {
    font-size: 1rem;
  }
}