:root {
  --bg: #071018;
  --panel: #0d1b27;
  --card: #102433;
  --line: #1e3a4c;
  --text: #d7ece6;
  --muted: #7ea3a0;
  --cyan: #2ee6c5;
  --amber: #f0b429;
  --red: #ff5d73;
  --green: #3ddc97;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: "Segoe UI", "PingFang SC", sans-serif; }
body {
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 12% 8%, rgba(46, 230, 197, 0.12), transparent 28%),
    radial-gradient(circle at 90% 0%, rgba(240, 180, 41, 0.1), transparent 32%),
    linear-gradient(180deg, #071018 0%, #08141d 100%);
}

.app { max-width: 1280px; margin: 0 auto; padding: 24px 20px 48px; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; }
.top-right { display: flex; align-items: center; gap: 12px; }
.user-box { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand-mark {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #123, #0a2);
  color: var(--cyan); font-weight: 800; letter-spacing: 1px;
  border: 1px solid #2ee6c555;
}
.brand h1 { margin: 0; font-size: 22px; }
.brand p { margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.status-box {
  display: flex; align-items: center; gap: 10px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 10px 14px; min-width: 220px;
}
.status-box small { color: var(--muted); display: block; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--red); box-shadow: 0 0 8px var(--red); }
.dot.online { background: var(--green); box-shadow: 0 0 8px var(--green); }

.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
  background: transparent; color: var(--muted); border: 1px solid var(--line);
  border-radius: 999px; padding: 8px 16px; cursor: pointer;
}
.tab.active { color: #062019; background: var(--cyan); border-color: var(--cyan); font-weight: 700; }

.panel { display: none; }
.panel.active { display: block; }
.toolbar { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.hint { color: var(--muted); font-size: 13px; }
.btn {
  border: 1px solid var(--line); background: #123041; color: var(--text);
  border-radius: 10px; padding: 8px 14px; cursor: pointer;
}
.btn.primary { background: var(--cyan); color: #062019; border-color: var(--cyan); font-weight: 700; }
.btn.danger { background: transparent; color: var(--red); border-color: #ff5d7355; }

.table-wrap {
  overflow: auto; border: 1px solid var(--line); border-radius: 16px;
  background: var(--panel); box-shadow: var(--shadow);
}
table { width: 100%; border-collapse: collapse; min-width: 1180px; }
th, td { padding: 12px 10px; text-align: left; border-bottom: 1px solid #163244; font-size: 13px; }
th { color: var(--muted); font-weight: 600; background: #0f2230; position: sticky; top: 0; }
.empty { text-align: center; color: var(--muted); padding: 36px 0; }
.up { color: var(--red); }
.down { color: var(--green); }
.mono { font-variant-numeric: tabular-nums; }
.actions { display: flex; gap: 6px; }

.notify-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 18px; box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 12px; font-size: 16px; }
label { display: block; margin: 8px 0; color: var(--muted); font-size: 13px; }
input[type="text"], input[type="number"], input[type="password"], input:not([type]) {
  width: 100%; margin-top: 6px; padding: 9px 10px; border-radius: 8px;
  border: 1px solid var(--line); background: #0a1822; color: var(--text);
}
.switch { display: flex; align-items: center; gap: 8px; color: var(--text); }
.form-actions { grid-column: 1 / -1; display: flex; align-items: center; gap: 12px; }
.msg { color: var(--cyan); font-size: 13px; }
.msg.error { color: var(--red); }

.modal {
  position: fixed; inset: 0; background: rgba(3, 10, 16, 0.72);
  display: grid; place-items: center; padding: 16px;
}
.modal.hidden { display: none; }
.dialog {
  width: min(520px, 100%); background: #0e1f2c; border: 1px solid var(--line);
  border-radius: 18px; padding: 20px; box-shadow: var(--shadow);
}
fieldset { border: 1px dashed var(--line); border-radius: 12px; margin-top: 10px; }
.rule { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.rule input[type="number"] { width: 120px; margin-top: 0; }

.login-body { display: grid; place-items: center; min-height: 100vh; padding: 24px; }
.login-card {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.login-card .brand { margin-bottom: 18px; }
.login-card .btn { width: 100%; margin-top: 10px; }