:root {
  --bg-color: #0d1117;
  --card-bg: #161b22;
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  --primary: #238636;
  --primary-hover: #2ea043;
  --danger: #da3633;
  --danger-hover: #f85149;
  --border-color: #30363d;
  --input-bg: #0d1117;
  --accent: #58a6ff;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3 {
  color: #fff;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

.hidden {
  display: none !important;
}

.btn {
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid rgba(27, 31, 35, 0.15);
  font-weight: 600;
  cursor: pointer;
  background-color: #21262d;
  color: #c9d1d9;
  border-color: var(--border-color);
  transition: 0.2s;
}

.btn:hover {
  background-color: #30363d;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
  border-color: rgba(27, 31, 35, 0.15);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-danger {
  background-color: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background-color: var(--danger-hover);
}

.input-group {
  margin-bottom: 1rem;
}

.input-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-main);
}

input[type="text"], input[type="password"], input[type="number"] {
  width: 100%;
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: var(--input-bg);
  color: var(--text-main);
  font-size: 14px;
}

input:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.3);
}