:root {
  --bg-app: #0d1117;
  --bg-panel: #161b22;
  --bg-panel-alt: #21262d;
  --bg-hover: #30363d;
  --border: #30363d;
  --text-main: #e6edf3;
  --text-muted: #848d97;
  --accent: #2f81f7;
  --accent-strong: #1f6feb;
  --success: #3fb950;
  --danger: #f85149;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow: 0 8px 24px rgba(1, 4, 9, 0.75);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-app);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-panel-alt);
  color: var(--text-main);
  padding: 5px 12px;
  cursor: pointer;
  transition: background 0.1s ease, border-color 0.1s ease;
  font-size: 14px;
}

button:hover {
  background: var(--bg-hover);
  border-color: #8b949e;
}

button.primary {
  background: #238636;
  border-color: rgba(240, 246, 252, 0.1);
  color: #ffffff;
}

button.primary:hover {
  background: #2ea043;
  border-color: rgba(240, 246, 252, 0.1);
}

button.primary-blue {
  background: var(--accent-strong);
  border-color: rgba(240, 246, 252, 0.1);
  color: #ffffff;
}

button.primary-blue:hover {
  background: var(--accent);
  border-color: rgba(240, 246, 252, 0.1);
}

button.danger {
  border-color: rgba(248, 81, 73, 0.4);
  color: #f85149;
}

button.danger:hover {
  background: rgba(248, 81, 73, 0.1);
  border-color: #f85149;
}

input,
select,
textarea {
  width: 100%;
  padding: 5px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-app);
  color: var(--text-main);
  font-size: 14px;
  transition: border-color 0.1s ease, box-shadow 0.1s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 129, 247, 0.15);
}

textarea {
  min-height: 96px;
  resize: vertical;
}