:root {
  --bg: #0b0d12;
  --panel: #161922;
  --panel-2: #1d2030;
  --border: #252a3a;
  --text: #e6e8ef;
  --muted: #7a8198;
  --accent: #8b7cff;
  --accent-hov: #a094ff;
  --ok: #4ade80;
  --warn: #fbbf24;
  --err: #f87171;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI",
               system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* login */
.login-shell {
  display: flex; align-items: center; justify-content: center;
  height: 100vh; padding: 20px;
}
.login-card {
  background: var(--panel); padding: 36px; border-radius: 14px;
  width: 100%; max-width: 380px; box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.login-card h1 { font-size: 18px; color: var(--accent); margin-bottom: 6px; }
.login-card .hint { color: var(--muted); margin-bottom: 22px; }
.login-err { color: var(--err); font-size: 13px; margin-top: 10px; min-height: 18px; }

/* app shell */
.app { display: flex; height: 100vh; }

aside {
  width: 220px; background: var(--panel); padding: 24px 0;
  border-right: 1px solid var(--border); flex-shrink: 0;
  display: flex; flex-direction: column;
}
aside .brand {
  font-size: 13px; font-weight: 700; color: var(--accent);
  padding: 0 22px 24px; letter-spacing: 1.5px; text-transform: uppercase;
}
nav { flex: 1; }
nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 22px; color: var(--muted); cursor: pointer;
  font-size: 14px; border-left: 3px solid transparent;
  transition: all 0.12s ease;
}
nav a:hover { background: var(--panel-2); color: var(--text); }
nav a.active {
  background: var(--panel-2); color: var(--text);
  border-left-color: var(--accent);
}
aside .footer {
  padding: 16px 22px; color: var(--muted); font-size: 12px;
  border-top: 1px solid var(--border);
}
aside .footer a { color: var(--accent); cursor: pointer; }

main { flex: 1; overflow-y: auto; padding: 36px 40px; }
.section { display: none; }
.section.active { display: block; }

h2 { font-size: 22px; font-weight: 600; margin-bottom: 6px; }
.subtitle { color: var(--muted); margin-bottom: 24px; font-size: 13px; }

.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 22px; margin-bottom: 18px;
}
.card h3 {
  font-size: 12px; font-weight: 600; margin-bottom: 16px; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.6px;
}

/* stats grid */
.stats {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px; margin-bottom: 18px;
}
.stat {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 18px 20px;
}
.stat .l { color: var(--muted); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.6px; font-weight: 500; }
.stat .v { font-size: 26px; font-weight: 700; color: var(--accent); margin-top: 6px;
  font-variant-numeric: tabular-nums; }
.stat .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

/* tables */
.tbl-wrap { overflow-x: auto; margin: 0 -22px -22px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  text-align: left; padding: 10px 14px; color: var(--muted);
  font-weight: 500; border-bottom: 1px solid var(--border);
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px;
  background: var(--panel-2);
}
td { padding: 11px 14px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--panel-2); }
td.right { text-align: right; font-variant-numeric: tabular-nums; }
td.actions { text-align: right; white-space: nowrap; }

.mono {
  font-family: "SF Mono", "JetBrains Mono", Consolas, monospace;
  font-size: 12px; color: var(--accent-hov);
  background: var(--panel-2); padding: 3px 7px; border-radius: 5px;
}

/* forms */
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: end; }
.row .grow { flex: 1; min-width: 180px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-size: 11px; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.5px;
}
input, select, textarea {
  background: var(--panel-2); border: 1px solid var(--border);
  color: var(--text); padding: 9px 12px; border-radius: 8px;
  font-size: 13px; font-family: inherit; outline: none;
  transition: border-color 0.12s;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); }
textarea { resize: vertical; min-height: 80px; font-family: "SF Mono", monospace; }

.btn {
  padding: 9px 16px; border-radius: 8px; border: none;
  cursor: pointer; font-size: 13px; font-weight: 500;
  transition: all 0.12s; font-family: inherit;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hov); }
.btn-danger { background: #4a1818; color: var(--err); }
.btn-danger:hover { background: #5e1d1d; }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); background: var(--panel-2); }
.btn-sm { padding: 5px 11px; font-size: 12px; }

.badge {
  display: inline-block; padding: 3px 9px; border-radius: 20px;
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.5px;
}
.badge.on { background: rgba(74, 222, 128, 0.15); color: var(--ok); }
.badge.off { background: rgba(248, 113, 113, 0.15); color: var(--err); }
.badge.cool { background: rgba(251, 191, 36, 0.15); color: var(--warn); }
.badge.window { background: rgba(139, 124, 255, 0.15); color: var(--accent-hov); }

.alert {
  padding: 12px 16px; border-radius: 10px;
  margin-bottom: 14px; font-size: 13px;
}
.alert-success { background: rgba(74, 222, 128, 0.1);
  border: 1px solid rgba(74, 222, 128, 0.3); color: var(--ok); }
.alert-err { background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3); color: var(--err); }

.copy {
  background: none; border: none; color: var(--accent);
  cursor: pointer; font-size: 11px; margin-left: 6px;
}
.copy:hover { text-decoration: underline; }

.modal-bg {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: none; align-items: center; justify-content: center; z-index: 50;
  padding: 20px;
}
.modal-bg.show { display: flex; }
.modal {
  background: var(--panel); border-radius: 14px; padding: 28px;
  width: 100%; max-width: 540px; max-height: 90vh; overflow-y: auto;
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.modal h3 {
  margin-bottom: 18px; color: var(--text);
  text-transform: none; letter-spacing: 0; font-size: 17px;
}
.modal-grid { display: grid; gap: 12px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px;
  flex-wrap: wrap; }

.muted-small { color: var(--muted); font-size: 12px; }

/* progress + windows */
.bar-wrap {
  background: var(--panel-2); border-radius: 4px; height: 6px;
  overflow: hidden; min-width: 60px;
}
.bar { background: var(--accent); height: 100%; transition: width 0.3s; }
.bar.warn { background: var(--warn); }
.bar.danger { background: var(--err); }

.window-cell {
  display: flex; flex-direction: column; gap: 4px;
  min-width: 160px;
}
.window-cell .nums {
  font-size: 12px; color: var(--text); font-variant-numeric: tabular-nums;
}
.window-cell .nums .lim { color: var(--muted); }
.window-cell .timer {
  font-size: 11px; color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.window-cell .timer.warn { color: var(--warn); }
.window-cell .timer.danger { color: var(--err); }

.window-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 18px;
}
@media (max-width: 700px) {
  .window-grid { grid-template-columns: 1fr; }
}
.window-block {
  background: var(--panel-2); border-radius: 10px; padding: 16px 18px;
  border: 1px solid var(--border);
}
.window-block .title {
  font-size: 11px; color: var(--muted); text-transform: uppercase;
  letter-spacing: 0.5px; margin-bottom: 8px;
}
.window-block .nums {
  font-size: 20px; font-weight: 600; font-variant-numeric: tabular-nums;
  margin-bottom: 4px;
}
.window-block .nums .lim { color: var(--muted); font-weight: 400; font-size: 14px; }
.window-block .sub { color: var(--muted); font-size: 12px; margin-bottom: 8px; }

/* key cards (upstream + users) */
.key-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 14px;
}
.key-card {
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: 12px; padding: 18px;
}
.key-card .head {
  display: flex; justify-content: space-between; align-items: start;
  gap: 10px; margin-bottom: 12px;
}
.key-card .name {
  font-size: 15px; font-weight: 600;
}
.key-card .label-line {
  font-size: 12px; color: var(--muted); margin-top: 2px;
}
.key-card .keyline {
  margin: 8px 0 14px;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.key-card .windows-list {
  display: flex; flex-direction: column; gap: 12px;
  margin-bottom: 12px;
}
.key-card .win-row {
  display: grid; grid-template-columns: 50px 1fr 90px;
  gap: 10px; align-items: center;
}
.key-card .win-row .wlabel {
  font-size: 11px; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.5px;
}
.key-card .win-row .wdata {
  display: flex; flex-direction: column; gap: 4px;
}
.key-card .win-row .wnums {
  font-size: 12px; font-variant-numeric: tabular-nums;
}
.key-card .win-row .wnums .lim { color: var(--muted); }
.key-card .win-row .wtimer {
  font-size: 11px; text-align: right; font-variant-numeric: tabular-nums;
  color: var(--muted);
}
.key-card .win-row .wtimer.warn { color: var(--warn); }
.key-card .win-row .wtimer.danger { color: var(--err); }
.key-card .actions {
  display: flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end;
  margin-top: 6px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 12px 18px; font-size: 13px;
  box-shadow: var(--shadow); z-index: 60;
  transform: translateY(120%); transition: transform 0.3s ease;
}
.toast.show { transform: translateY(0); }
.toast.ok { border-left: 3px solid var(--ok); }
.toast.err { border-left: 3px solid var(--err); }

.empty {
  padding: 40px 20px; text-align: center; color: var(--muted);
  font-size: 13px;
}