:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: #fff;
  --text: #162033;
  --muted: #68758a;
  --line: #dce3ee;
  --primary: #246bfd;
  --primary-dark: #1552cc;
  --ok: #0c8f55;
  --warn: #9a6700;
  --danger: #c83232;
  --shadow: 0 12px 32px rgba(26, 45, 78, .08);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif;
}
button, input { font: inherit; }
button, .button {
  border: 0; border-radius: 9px; padding: 10px 16px; background: var(--primary);
  color: white; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center;
  justify-content: center; font-weight: 650;
}
button:hover, .button:hover { background: var(--primary-dark); }
button.secondary, .button.secondary { background: #eef3ff; color: #2456ad; }
button.ghost { background: transparent; color: #dbe6ff; padding: 8px 12px; }
button.danger { background: #fff0f0; color: var(--danger); }
input {
  width: 100%; border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px;
  background: white; color: var(--text); outline: none;
}
input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(36,107,253,.12); }
label { display: grid; gap: 6px; font-weight: 600; color: #39465a; }
h1, h2, p { margin-top: 0; }
.muted { color: var(--muted); }
.auth-page { min-height: 100vh; display: grid; place-items: center; padding: 28px 16px; }
.auth-card {
  width: min(420px, 100%); background: var(--panel); border: 1px solid var(--line);
  border-radius: 18px; padding: 32px; box-shadow: var(--shadow); text-align: center;
}
.setup-card { width: min(560px, 100%); }
.brand-mark {
  width: 48px; height: 48px; border-radius: 14px; margin: 0 auto 16px; display: grid; place-items: center;
  background: linear-gradient(135deg,#246bfd,#69a0ff); color: white; font-size: 24px; font-weight: 800;
}
.stack { display: grid; gap: 16px; text-align: left; margin-top: 24px; }
.stack button { margin-top: 4px; }
.totp-box { margin: 24px 0; padding: 20px; background: #f7f9fc; border-radius: 14px; }
.totp-box h2, .stack h2 { font-size: 17px; }
.qr { width: 220px; max-width: 100%; border-radius: 12px; background: white; padding: 8px; }
.secret { display: grid; gap: 6px; }
.secret code { word-break: break-all; font-size: 14px; }
.topbar {
  height: 68px; padding: 0 max(20px, calc((100vw - 1180px)/2)); display: flex;
  align-items: center; justify-content: space-between; background: #142545; color: white;
}
.topbar div { display: flex; gap: 12px; align-items: baseline; }
.topbar span { color: #9fb4d6; font-size: 13px; }
.container { width: min(1180px, calc(100% - 32px)); margin: 28px auto 60px; }
.status-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-bottom: 20px; }
.status-grid article {
  background: var(--panel); border: 1px solid var(--line); border-radius: 13px; padding: 16px 18px;
  display: flex; justify-content: space-between; gap: 12px;
}
.status-grid span { color: var(--muted); }
.ok { color: var(--ok); }
.bad { color: var(--danger); }
.alert { padding: 12px 15px; border-radius: 10px; margin: 0 0 18px; }
.alert.success { background: #eaf8f1; color: #096a42; }
.alert.error { background: #fff0f0; color: #9f2626; }
.alert.warning { background: #fff7df; color: #7a5100; }
.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: 15px; padding: 22px;
  box-shadow: 0 4px 18px rgba(26,45,78,.04); margin-bottom: 20px;
}
.section-head h1 { margin-bottom: 2px; }
.section-head p { color: var(--muted); }
.create-form { display: grid; grid-template-columns: 1fr 1fr auto; align-items: end; gap: 14px; }
.user-list { display: grid; gap: 14px; }
.user-card { background: var(--panel); border: 1px solid var(--line); border-radius: 15px; overflow: hidden; }
.user-main {
  display: grid; grid-template-columns: minmax(180px,1.4fr) repeat(3,1fr); gap: 18px;
  align-items: center; padding: 20px 22px;
}
.user-main h2 { margin: 0 0 6px; font-size: 18px; }
.badge { display: inline-flex; border-radius: 99px; padding: 2px 9px; font-size: 12px; font-weight: 700; }
.badge.active { background: #e8f8f0; color: var(--ok); }
.badge.inactive { background: #f1f3f6; color: #6b7280; }
.metric { display: grid; }
.metric span, .metric small { color: var(--muted); font-size: 12px; }
.metric strong { font-size: 16px; }
.user-detail { border-top: 1px solid var(--line); padding: 15px 22px; background: #fbfcfe; }
.expiry { color: var(--muted); margin-bottom: 10px; }
.copy-row { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; }
.copy-row input { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; }
.actions {
  display: flex; gap: 8px; align-items: center; padding: 12px 22px; border-top: 1px solid var(--line);
}
.actions details { position: relative; }
.actions summary { cursor: pointer; color: #456184; padding: 8px 10px; }
.danger-menu {
  position: absolute; z-index: 5; right: 0; top: 36px; width: 190px; padding: 10px;
  background: white; border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow);
  display: grid; gap: 8px;
}
.danger-menu button { width: 100%; }
.empty { padding: 50px; text-align: center; color: var(--muted); background: white; border-radius: 15px; }
.sub-page { background: linear-gradient(180deg,#eef4ff 0,#f7f9fc 300px); min-height: 100vh; }
.sub-container { width: min(920px,calc(100% - 32px)); margin: 0 auto; padding: 42px 0 64px; }
.sub-header { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; }
.sub-header .brand-mark { margin: 0; }
.sub-header h1 { margin: 0; }
.sub-header p { margin: 2px 0 0; color: var(--muted); }
.sub-summary { display: grid; grid-template-columns: repeat(3,1fr); background: white; border: 1px solid var(--line); border-radius: 15px; margin-bottom: 20px; }
.sub-summary div { padding: 18px 20px; display: grid; gap: 4px; border-right: 1px solid var(--line); }
.sub-summary div:last-child { border-right: 0; }
.sub-summary span { color: var(--muted); font-size: 12px; }
.subscription-buttons { display: flex; gap: 10px; flex-wrap: wrap; }
.node-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.node-card { background: white; border: 1px solid var(--line); border-radius: 15px; padding: 24px; text-align: center; }
.node-card h2 { margin: 12px 0 4px; }
.node-card p { color: var(--muted); min-height: 46px; }
.node-card button { width: 100%; margin-top: 12px; }
.protocol { display: inline-flex; padding: 3px 10px; border-radius: 99px; font-size: 12px; font-weight: 700; }
.protocol.tcp { color: #2259be; background: #eaf1ff; }
.protocol.udp { color: #7b4d00; background: #fff4d6; }
.privacy-note { margin: 24px 0 0; text-align: center; color: var(--muted); font-size: 13px; }
@media (max-width: 760px) {
  .status-grid, .sub-summary, .node-grid { grid-template-columns: 1fr; }
  .create-form { grid-template-columns: 1fr; }
  .user-main { grid-template-columns: 1fr 1fr; }
  .copy-row { grid-template-columns: 1fr; }
  .actions { align-items: stretch; flex-wrap: wrap; }
  .topbar span { display: none; }
  .sub-summary div { border-right: 0; border-bottom: 1px solid var(--line); }
  .sub-summary div:last-child { border-bottom: 0; }
}