* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: #0d0f1a;
  color: #e8eaf0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: #7c93ff; text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; background: #161a2b; border-bottom: 1px solid #2a2f45;
  position: sticky; top: 0; z-index: 10;
}
.topbar .logo { font-size: 18px; font-weight: 700; color: #fff; }
.topbar nav { display: flex; align-items: center; gap: 18px; }
.topbar nav a { color: #c5cae9; }
.topbar nav a.logout { color: #ff8a8a; }
.topbar nav .user { color: #9fa8da; font-size: 14px; }

.container { max-width: 1100px; width: 100%; margin: 0 auto; padding: 28px 20px; flex: 1; }

.footer { text-align: center; padding: 18px; color: #6c7095; font-size: 13px; border-top: 1px solid #1e2238; }

.auth-card { max-width: 380px; margin: 40px auto; background: #161a2b; padding: 28px; border-radius: 12px; border: 1px solid #2a2f45; }
.auth-card h1 { margin-bottom: 20px; color: #fff; }
.auth-card label { display: block; margin-bottom: 14px; font-size: 14px; color: #9fa8da; }
.auth-card input, .auth-card select {
  display: block; width: 100%; margin-top: 6px; padding: 10px 12px;
  background: #0d0f1a; border: 1px solid #2a2f45; border-radius: 6px; color: #fff;
  font-size: 14px;
}
.auth-card .hint { font-size: 12px; color: #6c7095; margin-top: -6px; margin-bottom: 14px; }

.btn {
  display: inline-block; padding: 10px 18px; border-radius: 6px; border: none; cursor: pointer;
  background: #3949ab; color: #fff; font-size: 14px; text-decoration: none;
}
.btn:hover { background: #5c6bc0; text-decoration: none; }
.btn.primary { background: #7c93ff; }
.btn.primary:hover { background: #9ab0ff; }

.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert.error { background: #3a1d1d; color: #ff8a8a; border: 1px solid #6e2b2b; }
.alert.success { background: #1d3a24; color: #8be89b; border: 1px solid #2b6e3a; }
.muted { color: #6c7095; font-size: 13px; margin-top: 16px; }
.muted a { color: #7c93ff; }

.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.page-head h1 { color: #fff; }

.empty { text-align: center; padding: 60px 20px; color: #6c7095; }
.empty a { color: #7c93ff; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 18px; }
.card {
  background: #161a2b; border: 1px solid #2a2f45; border-radius: 10px; padding: 18px;
  position: relative; display: flex; flex-direction: column; gap: 8px;
}
.card h3 { color: #fff; font-size: 16px; word-break: break-all; }
.card-badge {
  position: absolute; top: 12px; right: 12px; font-size: 11px; font-weight: 700;
  padding: 3px 8px; border-radius: 10px; color: #fff;
}
.sys-nes { background: #c62828; }
.sys-md { background: #1565c0; }
.sys-ps1 { background: #2e7d32; }
.card-meta { font-size: 12px; color: #6c7095; word-break: break-all; }
.card-actions { margin-top: 6px; }

.sys-tag {
  font-size: 12px; padding: 2px 8px; border-radius: 10px; background: #2a2f45; color: #9fa8da;
}