:root {
  --bg: #f5f7fb;
  --bg-elevated: #ffffff;
  --bg-card: #ffffff;
  --border: #e5eaf2;
  --border-strong: #d0d7e3;
  --text: #1f2937;
  --text-muted: #6b7280;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eff6ff;
  --success: #16a34a;
  --danger: #dc2626;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 16px rgba(16, 24, 40, 0.06);
  --font: "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-badge {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--primary);
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 800;
  color: #fff;
}

.user-area {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.page-title {
  margin: 0 0 6px;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-desc {
  margin: 0 0 22px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

.card + .card {
  margin-top: 16px;
}

.card h2 {
  margin: 0 0 16px;
  font-size: 1.02rem;
  font-weight: 650;
  color: var(--text);
}

.grid-tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}

.tool-card {
  display: block;
  padding: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: inherit;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
  text-decoration: none;
}

.tool-card:hover {
  border-color: #bfdbfe;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.1);
  transform: translateY(-1px);
  text-decoration: none;
}

.tool-card h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  color: var(--text);
}

.tool-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.tool-card .tag {
  display: inline-block;
  margin-top: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
}

.form-grid {
  display: grid;
  gap: 14px;
}

.field label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.86rem;
  font-weight: 500;
  color: #4b5563;
}

.field label .req {
  color: var(--danger);
  margin-left: 2px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field input::placeholder,
.field textarea::placeholder {
  color: #9ca3af;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 700px) {
  .row-2 {
    grid-template-columns: 1fr;
  }
}

.url-list {
  display: grid;
  gap: 10px;
}

.url-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
}

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

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

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

.btn-secondary:hover {
  background: #f8fafc;
  border-color: #b6c0d1;
}

.btn-danger {
  background: #fff;
  border: 1px solid var(--border-strong);
  color: var(--danger);
  padding: 8px 12px;
}

.btn-danger:hover {
  background: #fef2f2;
  border-color: #fecaca;
}

.btn-sm {
  padding: 8px 12px;
  font-size: 0.88rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}

.output-box {
  width: 100%;
  min-height: 110px;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: #f8fafc;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  word-break: break-all;
  resize: vertical;
}

.hint {
  margin: 8px 0 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.hint code {
  padding: 1px 5px;
  border-radius: 4px;
  background: #eef2f7;
  font-size: 0.82em;
}

.error {
  color: var(--danger);
  font-size: 0.9rem;
  margin: 8px 0 0;
}

.success {
  color: var(--success);
  font-size: 0.9rem;
  margin: 8px 0 0;
}

.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(180deg, #eef3fb 0%, var(--bg) 55%);
}

.login-card {
  width: min(400px, 100%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.login-card h1 {
  margin: 0 0 6px;
  font-size: 1.35rem;
  color: var(--text);
}

.login-card .sub {
  margin: 0 0 22px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.login-card .field {
  margin-bottom: 14px;
}

.login-card .btn {
  width: 100%;
  margin-top: 6px;
}

.hidden {
  display: none !important;
}

.config-custom {
  margin-top: 10px;
}

.footer-note {
  margin-top: 28px;
  text-align: center;
  color: #9ca3af;
  font-size: 0.8rem;
}