body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: #222;
  background: #f5f5f5;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 20px 24px;
}

header {
  margin-bottom: 14px;
}

h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
}

.course,
.task {
  margin: 0;
}

.course {
  color: #1f5fbf;
}

.task {
  color: #555;
}

/* Filters */
.filters {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  background: #f9f9f9;
  border: 1px solid #e3e3e3;
  border-radius: 4px;
  padding: 8px 10px;
  margin-bottom: 10px;
  font-size: 0.875rem;
}

.filters label {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.filters select,
.filters input {
  font: inherit;
  padding: 4px 6px;
  border: 1px solid #ccc;
  border-radius: 3px;
  background: #fff;
}

.filters select { min-width: 160px; }
.filters select[id$="year-min"],
.filters select[id$="year-max"] { min-width: 90px; }

.filters .toggle-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.filters .toggle-group .option {
  min-height: 30px;
  align-items: center;
}

.filters .toggle-group label {
  flex-direction: row;
  align-items: center;
  gap: 4px;
}

.filters .toggle-group input {
  padding: 0;
  margin: 0;
  border: 0;
}

.filters button {
  font: inherit;
  padding: 5px 12px;
  border: 1px solid #1f5fbf;
  border-radius: 3px;
  background: #1f5fbf;
  color: #fff;
  cursor: pointer;
}

.status {
  margin: 0 0 10px;
  color: #555;
}

.status:empty { display: none; }

/* Chart panels */
.panel {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 14px 16px;
  margin-bottom: 14px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}

h2 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.option {
  display: flex;
  gap: 12px;
  font-size: 0.875rem;
}

.option label,
label.option {
  cursor: pointer;
}

.note {
  margin: 4px 0 10px;
  color: #555;
  font-size: 0.9rem;
}

.caption {
  margin: 6px 0 0;
  color: #777;
  font-size: 0.8rem;
}

.chart-box {
  position: relative;
  height: 380px;
}

footer {
  color: #777;
  font-size: 0.8rem;
}