:root {
  --bg: #0f1419;
  --card: #1a2332;
  --border: #2d3a4f;
  --text: #e8edf4;
  --muted: #8b9cb3;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #22c55e;
  --danger: #ef4444;
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top, #1e293b 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.6;
}

.page {
  max-width: 920px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.header {
  text-align: center;
  margin-bottom: 32px;
}

.header h1 {
  margin: 0 0 8px;
  font-size: 2rem;
  font-weight: 700;
}

.header p {
  margin: 0;
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.tab-btn {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 15px;
  transition: all 0.2s;
}

.tab-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.card h2 {
  margin: 0 0 16px;
  font-size: 1.1rem;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--muted);
}

.field input,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0d1117;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}

.field textarea {
  min-height: 110px;
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.hint {
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

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

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

.btn-secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

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

.result {
  margin-top: 20px;
  padding: 16px;
  border-radius: 8px;
  background: #0d1117;
  border: 1px solid var(--border);
}

.result-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}

.result-value {
  word-break: break-all;
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
  color: #93c5fd;
}

.alert {
  padding: 12px 14px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}

.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #fca5a5;
}

.alert-success {
  background: rgba(34, 197, 94, 0.15);
  border: 1px solid rgba(34, 197, 94, 0.4);
  color: #86efac;
}

.info-grid {
  display: grid;
  gap: 12px;
}

.info-item {
  padding: 12px;
  background: #0d1117;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.info-item strong {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}

.footer {
  text-align: center;
  margin-top: 32px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 600px) {
  .page {
    padding: 24px 16px 40px;
  }

  .header h1 {
    font-size: 1.5rem;
  }
}