:root {
  --bg-color: #ffffff;
  --text-color: #000000;
  --card-bg: #f8f9fa;
  --border-color: #e0e0e0;
  --input-bg: #ffffff;
  --input-border: #d0d0d0;
  --button-bg: #0078d4;
  --button-hover: #106ebe;
  --button-text: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --card-bg: #2d2d2d;
    --border-color: #404040;
    --input-bg: #2d2d2d;
    --input-border: #505050;
    --button-bg: #0078d4;
    --button-hover: #1a86d9;
    --button-text: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  }
}

:root.light {
  --bg-color: #ffffff;
  --text-color: #000000;
  --card-bg: #f8f9fa;
  --border-color: #e0e0e0;
  --input-bg: #ffffff;
  --input-border: #d0d0d0;
  --button-bg: #0078d4;
  --button-hover: #106ebe;
  --button-text: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
}

:root.dark {
  --bg-color: #1a1a1a;
  --text-color: #ffffff;
  --card-bg: #2d2d2d;
  --border-color: #404040;
  --input-bg: #2d2d2d;
  --input-border: #505050;
  --button-bg: #0078d4;
  --button-hover: #1a86d9;
  --button-text: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 2rem;
  line-height: 1.6;
}

h1 {
  font-size: 2.5rem;
  font-weight: 600;
  margin: 0 0 2rem 0;
  color: var(--text-color);
}

.top-right-controls {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}

.top-right-controls label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.top-right-controls input[type="checkbox"] {
  cursor: pointer;
}

.top-right-controls select {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background-color: var(--input-bg);
  color: var(--text-color);
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.2s;
}

.top-right-controls select:hover {
  border-color: var(--button-bg);
}

.top-right-controls select:focus {
  outline: none;
  border-color: var(--button-bg);
  box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.2);
}

.form {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  padding: 1.5rem;
  background-color: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

.form > div {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form label {
  font-weight: 500;
  font-size: 0.95rem;
  white-space: nowrap;
}

.form input[type="date"] {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  background-color: var(--input-bg);
  color: var(--text-color);
  font-family: inherit;
  font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form input[type="date"]:hover {
  border-color: var(--button-bg);
}

.form input[type="date"]:focus {
  outline: none;
  border-color: var(--button-bg);
  box-shadow: 0 0 0 2px rgba(0, 120, 212, 0.2);
}

.form input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  cursor: pointer;
  accent-color: var(--button-bg);
}

.form button {
  padding: 0.6rem 1.5rem;
  background-color: var(--button-bg);
  color: var(--button-text);
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  box-shadow: var(--shadow-sm);
}

.form button:hover {
  background-color: var(--button-hover);
}

.form button:active {
  transform: translateY(1px);
}

.charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(600px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.chart {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  transition: box-shadow 0.3s, transform 0.3s;
}

.chart:hover {
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
}

/* both themes */
[aria-label="tip"] text {
  fill: #000 !important;
}

/* Responsive design */
@media (max-width: 768px) {
  body {
    padding: 1rem;
  }

  h1 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
  }

  .top-right-controls {
    position: static;
    margin-bottom: 1rem;
    justify-content: flex-start;
  }

  .form {
    flex-direction: column;
    align-items: flex-start;
  }

  .form > div {
    width: 100%;
  }

  .charts {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .chart {
    padding: 1rem;
  }
}