*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background: #1b1b1b;
  color: #e0e0e0;
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  line-height: 1.5;
}

.app-container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 16px;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.app-header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  color: #ffffff;
}

.app-header fluent-select {
  min-width: 140px;
}

/* Intro paragraph */
.intro-text {
  margin: 0 0 16px;
  color: #b0b0b0;
  font-size: 0.9rem;
}

/* Cards */
fluent-card {
  display: block;
  padding: 16px;
  margin-bottom: 12px;
}

/* Control row: button + time + switch */
.control-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.control-row fluent-button {
  min-width: 100px;
}

#time {
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.9rem;
  color: #b0b0b0;
  flex: 1;
}

.summer-time-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: #b0b0b0;
  white-space: nowrap;
}

/* Canvas sections */
.canvas-wrapper {
  overflow: hidden;
}

.canvas-wrapper canvas {
  width: 100%;
  display: block;
}

.card-heading {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 600;
  color: #ffffff;
}

/* Divider */
fluent-divider {
  margin: 20px 0;
}

/* Accordion */
fluent-accordion {
  margin-bottom: 24px;
}

fluent-accordion-item {
  --neutral-stroke-rest: #333;
}

fluent-accordion-item p {
  margin: 4px 0 8px;
  font-size: 0.9rem;
  color: #b0b0b0;
  line-height: 1.6;
}

fluent-accordion-item ul {
  margin: 4px 0 8px;
  padding-left: 20px;
}

fluent-accordion-item a {
  color: #4fc3f7;
}

fluent-accordion-item a:hover {
  color: #81d4fa;
}

/* Responsive */
@media (max-width: 600px) {
  .app-container {
    padding: 12px;
  }

  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .app-header h1 {
    font-size: 1.25rem;
  }

  .control-row {
    flex-direction: column;
    align-items: stretch;
  }

  #time {
    text-align: center;
  }
}