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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  min-height: 100vh;
}

/* Login */
.login-screen {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; background: #0f172a;
}
.login-box {
  background: #1e293b; padding: 40px; border-radius: 12px;
  text-align: center; min-width: 320px;
  box-shadow: 0 25px 50px rgba(0,0,0,.5);
}
.login-box h1 { margin-bottom: 24px; font-size: 1.5rem; }
.login-box input {
  width: 100%; padding: 10px 14px; margin-bottom: 12px;
  background: #0f172a; border: 1px solid #334155; border-radius: 6px;
  color: #e2e8f0; font-size: 14px;
}
.login-box button {
  width: 100%; padding: 10px; background: #3b82f6; color: #fff;
  border: none; border-radius: 6px; cursor: pointer; font-size: 14px; font-weight: 600;
}
.login-box button:hover { background: #2563eb; }
.error { color: #ef4444; margin-top: 8px; font-size: 13px; }

/* Nav */
nav {
  display: flex; align-items: center; gap: 16px;
  padding: 0 24px; height: 56px;
  background: #1e293b; border-bottom: 1px solid #334155;
}
.nav-brand { font-weight: 700; font-size: 1.1rem; margin-right: 24px; }
.nav-tabs { display: flex; gap: 4px; flex: 1; }
.tab {
  padding: 8px 16px; background: transparent; color: #94a3b8;
  border: none; border-radius: 6px; cursor: pointer; font-size: 13px; font-weight: 500;
}
.tab:hover { background: #334155; color: #e2e8f0; }
.tab.active { background: #3b82f6; color: #fff; }
.btn-logout {
  padding: 6px 12px; background: transparent; color: #94a3b8;
  border: 1px solid #475569; border-radius: 6px; cursor: pointer; font-size: 12px;
}
.btn-logout:hover { background: #ef4444; color: #fff; border-color: #ef4444; }

/* Tab content */
.tab-content { display: none; padding: 24px; }
.tab-content.active { display: block; }

/* Stats */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px; margin-bottom: 24px;
}
.stat-card {
  background: #1e293b; padding: 24px; border-radius: 10px;
  border-left: 4px solid #3b82f6;
}
.stat-card.stat-online { border-left-color: #22c55e; }
.stat-card.stat-offline { border-left-color: #ef4444; }
.stat-card.stat-users { border-left-color: #a855f7; }
.stat-number { font-size: 2rem; font-weight: 700; }
.stat-label { color: #94a3b8; font-size: 13px; margin-top: 4px; }

/* Card */
.card {
  background: #1e293b; border-radius: 10px; padding: 20px;
  overflow-x: auto;
}

/* Table */
table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left; padding: 10px 12px; font-size: 13px;
  border-bottom: 1px solid #334155;
}
th { color: #94a3b8; font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }
tr:hover { background: #263248; }

/* Toolbar */
.toolbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px; flex-wrap: wrap; gap: 8px;
}
.toolbar h2 { font-size: 1.2rem; }
.toolbar div { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.toolbar input, .toolbar select {
  padding: 6px 10px; background: #0f172a; border: 1px solid #334155;
  border-radius: 6px; color: #e2e8f0; font-size: 13px;
}
.toolbar label { font-size: 13px; color: #94a3b8; display: flex; align-items: center; gap: 4px; }

/* Buttons */
.btn {
  padding: 6px 14px; border: 1px solid #475569; background: transparent;
  color: #e2e8f0; border-radius: 6px; cursor: pointer; font-size: 13px;
}
.btn:hover { background: #334155; }
.btn-primary { background: #3b82f6; border-color: #3b82f6; color: #fff; }
.btn-primary:hover { background: #2563eb; }
.btn-danger { background: #ef4444; border-color: #ef4444; color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* Status badge */
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 10px;
  font-size: 11px; font-weight: 600;
}
.badge-online { background: #166534; color: #4ade80; }
.badge-offline { background: #7f1d1d; color: #fca5a5; }
.badge-expired { background: #78350f; color: #fcd34d; }

/* Toast */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: #1e293b; border: 1px solid #334155; border-radius: 8px;
  padding: 12px 20px; font-size: 13px; opacity: 0;
  transition: opacity .3s; pointer-events: none;
  z-index: 1000; max-width: 400px;
}
.toast.show { opacity: 1; pointer-events: auto; }
.toast.error { border-color: #ef4444; }
.toast.success { border-color: #22c55e; }

/* Key display */
.key-text {
  font-family: monospace; font-size: 11px; background: #0f172a;
  padding: 2px 6px; border-radius: 4px; word-break: break-all;
  cursor: pointer;
}
.key-text:hover { background: #334155; }