:root {
  --bg1: #0f1020;
  --bg2: #171a33;
  --panel: rgba(255, 255, 255, 0.06);
  --text: #eef2ff;
  --muted: #9aa3bf;
  --accent: #00d4aa;
  --danger: #ff6b6b;
  --ok: #7CFFB2;
  --border: rgba(255, 255, 255, 0.12);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Microsoft JhengHei", sans-serif;
  color: var(--text);
  background: linear-gradient(135deg, var(--bg1), var(--bg2));
}

.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 20% 0%, rgba(0, 212, 170, 0.18), transparent 35%);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  backdrop-filter: blur(10px);
  background: rgba(10, 12, 24, 0.75);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 700; letter-spacing: 0.3px; }
.topbar nav a {
  color: var(--muted);
  text-decoration: none;
  margin-left: 16px;
}
.topbar nav a:hover { color: var(--accent); }

.container {
  width: min(1100px, calc(100% - 32px));
  margin: 24px auto 48px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

h1, h2 { margin-top: 0; }
.muted { color: var(--muted); }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
}

input[type=text], input[type=password], input[type=number], textarea, select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
}

textarea { min-height: 90px; resize: vertical; }

.btn {
  display: inline-block;
  border: 0;
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn-primary { background: var(--accent); color: #04241d; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-secondary { background: rgba(255,255,255,0.12); color: var(--text); }

table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
th { color: var(--muted); font-size: 13px; }
.mono { font-family: Consolas, monospace; font-size: 12px; word-break: break-all; }

.alert {
  padding: 12px 14px;
  border-radius: 10px;
  margin-bottom: 16px;
}
.alert-ok { background: rgba(124, 255, 178, 0.12); border: 1px solid rgba(124, 255, 178, 0.35); }
.alert-error { background: rgba(255, 107, 107, 0.12); border: 1px solid rgba(255, 107, 107, 0.35); }

.sub-card {
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin-top: 10px;
}

.actions a, .actions form { display: inline-block; margin-right: 8px; }

.login-wrap {
  width: min(420px, 100%);
  margin: 80px auto;
}

@media (max-width: 800px) {
  .grid-2 { grid-template-columns: 1fr; }
}