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

:root {
  --bg: #0f1117;
  --bg-card: #1a1d27;
  --bg-card-hover: #22263a;
  --border: #2a2d3a;
  --text: #e1e4ed;
  --text-secondary: #8b8fa3;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 20px;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 700;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-user {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.version {
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-card);
  padding: 2px 8px;
  border-radius: 4px;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: var(--accent);
}

.card-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-value {
  font-size: 1.1rem;
  font-weight: 600;
}

.card-value.mono {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.85rem;
  word-break: break-all;
}

.card-value.big {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 6px;
}

.dot.green { background: var(--success); box-shadow: 0 0 8px var(--success); }
.dot.yellow { background: var(--warning); box-shadow: 0 0 8px var(--warning); }
.dot.red { background: var(--error); box-shadow: 0 0 8px var(--error); }
.dot.gray { background: #555; }

.btn-sm {
  margin-top: 8px;
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-sm:hover {
  border-color: var(--accent);
  color: var(--text);
}

.btn-sm:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Actions */
.actions {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

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

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

.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

/* Progress */
.progress-bar {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin-bottom: 8px;
  overflow: hidden;
}

.progress-inner {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: 2px;
  animation: progress-indeterminate 1.5s ease-in-out infinite;
}

@keyframes progress-indeterminate {
  0% { width: 0%; margin-left: 0; }
  50% { width: 60%; margin-left: 20%; }
  100% { width: 0%; margin-left: 100%; }
}

.progress-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  max-width: 420px;
  width: 90%;
}

.modal-content h3 {
  margin-bottom: 8px;
  font-size: 1.2rem;
}

.modal-desc {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.captcha-img {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 16px;
  background: #fff;
}

.captcha-input-row {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.captcha-input-row input {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}

.captcha-input-row input:focus {
  border-color: var(--accent);
}

.captcha-timer {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: center;
}

/* Form */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="password"] {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus {
  border-color: var(--accent);
}

.form-group input[type="checkbox"] {
  margin-right: 8px;
  accent-color: var(--accent);
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

/* Logs */
.logs-section {
  margin-top: 32px;
}

.logs-section h2 {
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.logs {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  max-height: 400px;
  overflow-y: auto;
}

.logs::-webkit-scrollbar {
  width: 6px;
}

.logs::-webkit-scrollbar-track {
  background: transparent;
}

.logs::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.log-entry {
  display: flex;
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  font-size: 0.85rem;
  align-items: flex-start;
}

.log-entry:last-child {
  border-bottom: none;
}

.log-time {
  color: var(--text-secondary);
  font-family: monospace;
  font-size: 0.8rem;
  white-space: nowrap;
  min-width: 75px;
}

.log-level {
  font-weight: 600;
  min-width: 40px;
  font-size: 0.75rem;
}

.log-level.success { color: var(--success); }
.log-level.warn { color: var(--warning); }
.log-level.error { color: var(--error); }
.log-level.info { color: var(--accent); }

.log-msg {
  flex: 1;
}

/* Utilities */
.hidden {
  display: none !important;
}

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

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  z-index: 200;
  animation: toast-in 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.toast.success { background: #166534; color: #bbf7d0; }
.toast.error { background: #7f1d1d; color: #fecaca; }
.toast.info { background: #1e3a5f; color: #bfdbfe; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Public Key Card */
.public-key-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin-bottom: 24px;
}

.public-key-card .card-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.public-key-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.public-key-value {
  flex: 1;
  min-width: 0;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.85rem;
  color: var(--success);
  background: var(--bg);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  word-break: break-all;
  border: 1px solid var(--border);
}

/* Login Page */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
}

.login-card h1 {
  font-size: 1.3rem;
  text-align: center;
  margin-bottom: 8px;
}

.login-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 28px;
}

.btn-full {
  width: 100%;
  justify-content: center;
  padding: 12px;
  font-size: 1rem;
  margin-top: 8px;
}

/* Responsive */
@media (max-width: 600px) {
  .cards {
    grid-template-columns: 1fr 1fr;
  }
  .actions {
    flex-direction: column;
  }
  .btn {
    width: 100%;
    justify-content: center;
  }
}