:root {
  --bg: #0f1419;
  --card: #1a2332;
  --border: #2d3a4d;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --success: #22c55e;
  --danger: #ef4444;
  --radius: 10px;
}

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

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
}

header h1 {
  font-size: 1.35rem;
  font-weight: 600;
}

header p {
  color: var(--muted);
  font-size: 0.875rem;
  margin-top: 4px;
}

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

.card h2 {
  font-size: 1rem;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.field input {
  width: 100%;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.9375rem;
}

.field input:focus {
  outline: none;
  border-color: var(--primary);
}

.field .hint {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 4px;
}

.field .badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 8px;
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
}

.callback-box {
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  font-family: ui-monospace, monospace;
  font-size: 0.8125rem;
  word-break: break-all;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.guide {
  color: var(--muted);
  font-size: 0.875rem;
  margin-bottom: 14px;
}

.guide strong {
  color: var(--text);
}

.guide ol {
  margin: 10px 0 0 1.2rem;
}

.guide li {
  margin-bottom: 6px;
}

.btn {
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: background 0.15s;
}

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

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

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

.btn-ghost:hover { color: var(--text); border-color: var(--muted); }

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8125rem;
  flex-shrink: 0;
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.hidden { display: none !important; }

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  z-index: 100;
  animation: fadeIn 0.2s ease;
}

.toast.error { border-color: var(--danger); color: #fca5a5; }
.toast.success { border-color: var(--success); }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-wrap {
  max-width: 400px;
  margin: 80px auto;
}

.login-wrap h1 {
  text-align: center;
  margin-bottom: 8px;
}

.login-wrap .subtitle {
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
  margin-bottom: 28px;
}

.user-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.875rem;
  color: var(--muted);
}

.kf-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.kf-account-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kf-account-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.kf-account-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.kf-account-info code {
  font-size: 0.8125rem;
  color: var(--muted);
  word-break: break-all;
}

.kf-account-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.upload-box {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.upload-box h3 {
  font-size: 0.9375rem;
  margin-bottom: 12px;
  font-weight: 600;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--muted);
  margin: 12px 0;
  cursor: pointer;
}

.upload-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.upload-file-label {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  margin: 0;
}

.upload-progress {
  margin-top: 14px;
}

.progress-bar {
  height: 8px;
  background: var(--bg);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--primary), #60a5fa);
  transition: width 0.25s ease;
}

.upload-errors {
  margin-top: 10px;
  padding: 10px 12px;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: 8px;
  font-size: 0.8125rem;
  color: #fca5a5;
  max-height: 120px;
  overflow: auto;
}

.file-input-hidden {
  position: absolute;
  width: 0;
  height: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}

.upload-dropzone {
  margin-top: 12px;
  padding: 20px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
  transition: border-color 0.15s, background 0.15s;
}

.upload-dropzone.dragover {
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.08);
  color: var(--text);
}

.browse-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.crumb-btn {
  padding: 2px 8px !important;
  font-size: 0.75rem !important;
}