* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f1117;
  color: #e1e4e8;
  min-height: 100vh;
}

header {
  padding: 1.5rem 2rem 0.5rem;
}

h1 {
  font-size: 1.4rem;
  font-weight: 600;
  color: #f0f0f0;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem 2rem;
}

.controls {
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.input-group.inline {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

label {
  font-size: 0.8rem;
  color: #8b949e;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

input[type="text"], input[type="number"], select {
  background: #1c1f26;
  border: 1px solid #30363d;
  color: #e1e4e8;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-size: 0.95rem;
  outline: none;
}

input[type="text"] { width: 260px; }
input[type="number"] { width: 80px; }

input:focus, select:focus {
  border-color: #58a6ff;
}

select {
  cursor: pointer;
}

button#fetch-btn {
  background: #238636;
  color: #fff;
  border: none;
  padding: 0.5rem 1.5rem;
  border-radius: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  font-weight: 500;
}

button#fetch-btn:hover { background: #2ea043; }
button#fetch-btn:disabled { opacity: 0.5; cursor: not-allowed; }

#status {
  font-size: 0.85rem;
  color: #8b949e;
}

.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid #30363d;
  margin-bottom: 1rem;
}

.tab {
  background: none;
  border: none;
  color: #8b949e;
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  font-size: 0.9rem;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}

.tab:hover { color: #e1e4e8; }
.tab.active { color: #58a6ff; border-bottom-color: #58a6ff; }

.tab-content { display: none; }
.tab-content.active { display: block; }

.chart {
  width: 100%;
  min-height: 500px;
  background: #161b22;
  border-radius: 8px;
  border: 1px solid #30363d;
}

.slider-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

input[type="range"] {
  flex: 1;
  min-width: 200px;
  accent-color: #58a6ff;
}

.result {
  font-size: 0.95rem;
  color: #f0c040;
  font-weight: 500;
}