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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  min-height: 100vh;
  color: #e2e8f0;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.page-header {
  text-align: center;
  margin-bottom: 28px;
}

.page-header h1 {
  font-size: 28px;
  font-weight: 700;
}

.subtitle {
  margin-top: 8px;
  color: #94a3b8;
  font-size: 14px;
}

.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

@media (max-width: 720px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.card {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.card h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

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

.tab {
  flex: 1;
  padding: 10px 0;
  background: transparent;
  border: 1px solid #334155;
  border-radius: 10px;
  color: #94a3b8;
  cursor: pointer;
  font-size: 15px;
  transition: all 0.2s;
}

.tab.active {
  background: #3b82f6;
  border-color: #3b82f6;
  color: #fff;
  font-weight: 600;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13px;
  color: #94a3b8;
  margin-bottom: 6px;
}

.field input,
.field select {
  width: 100%;
  padding: 10px 12px;
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 10px;
  color: #e2e8f0;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.field input:focus,
.field select:focus {
  border-color: #3b82f6;
}

.btn {
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
  background: #334155;
  color: #e2e8f0;
}

.btn:hover {
  opacity: 0.88;
}

.btn.primary {
  background: #3b82f6;
  color: #fff;
}

.btn.danger {
  background: #ef4444;
  color: #fff;
}

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

.hint {
  margin-top: 12px;
  font-size: 13px;
  min-height: 18px;
  word-break: break-all;
}

.hint.error {
  color: #f87171;
}

.hint.success {
  color: #34d399;
}

.profile {
  display: grid;
  grid-template-columns: 90px 1fr;
  row-gap: 10px;
  margin-bottom: 20px;
}

.profile dt {
  color: #94a3b8;
  font-size: 13px;
  padding-top: 2px;
}

.profile dd {
  font-size: 14px;
  word-break: break-all;
}

.actions {
  display: flex;
  gap: 12px;
}

.security-note {
  margin-top: 32px;
  background: #111c30;
  border: 1px solid #1e3a5f;
  border-radius: 12px;
  padding: 20px 24px;
  font-size: 13px;
  color: #94a3b8;
  line-height: 1.9;
}

.security-note h3 {
  color: #e2e8f0;
  font-size: 15px;
  margin-bottom: 8px;
}

.security-note ul {
  padding-left: 20px;
}

.security-note code {
  background: #0f172a;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 12px;
  color: #93c5fd;
}