:root {
  --bg-color: #0d1117;
  --card-bg: #161b22;
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  --border-color: #30363d;
  --primary: #238636;
  --primary-hover: #2ea043;
  --danger: #da3633;
  --danger-hover: #f85149;
  --accent: #58a6ff;
  --input-bg: #0d1117;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  padding: 24px 16px;
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: 680px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

header {
  text-align: center;
  margin-bottom: 8px;
}

.logo {
  font-size: 2rem;
  font-weight: 700;
  color: #f0883e;
  letter-spacing: 1px;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 4px;
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  color: #f0f6fc;
}

.form-group {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}

.flex-1 {
  flex: 1;
}

label {
  font-size: 0.9rem;
  color: var(--text-main);
  font-weight: 500;
}

textarea, select, input[type="text"] {
  background-color: var(--input-bg);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s ease;
  width: 100%;
}

textarea {
  resize: vertical;
}

textarea:focus, select:focus, input[type="text"]:focus {
  outline: none;
  border-color: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: background-color 0.2s ease, opacity 0.2s ease;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
  width: 100%;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: #21262d;
  color: #c9d1d9;
  border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background-color: #30363d;
}

.btn-danger {
  background-color: var(--danger);
  color: #fff;
  width: 100%;
  font-size: 1.05rem;
  padding: 14px;
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--danger-hover);
}

.btn-link {
  background: transparent;
  color: var(--accent);
  margin-top: 12px;
  padding: 0;
  font-weight: 400;
}

.btn-link:hover {
  text-decoration: underline;
}

.copy-input-group {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

.alert {
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 0.9rem;
  margin-bottom: 16px;
  line-height: 1.5;
}

.alert-success {
  background-color: rgba(46, 160, 67, 0.15);
  border: 1px solid rgba(46, 160, 67, 0.4);
  color: #3fb950;
}

.alert-warning {
  background-color: rgba(210, 153, 34, 0.15);
  border: 1px solid rgba(210, 153, 34, 0.4);
  color: #d29922;
}

.alert-danger, .alert-error {
  background-color: rgba(248, 81, 73, 0.15);
  border: 1px solid rgba(248, 81, 73, 0.4);
  color: #f85149;
}

.hint {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.meta-info {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  text-align: center;
}

.loading {
  text-align: center;
  color: var(--text-muted);
  padding: 24px;
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.actions .btn {
  flex: 1;
}

.hidden {
  display: none !important;
}

footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: auto;
  padding: 12px 0;
}