:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel2: #1c2333;
  --border: #2b3440;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #4f9dff;
  --green: #3fb950;
  --amber: #d29922;
  --red: #f85149;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: -apple-system, "Segoe UI", Roboto, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.hidden { display: none !important; }

/* login */
.login-screen {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
}
.login-box {
  background: var(--panel); border: 1px solid var(--border);
  padding: 40px; border-radius: 14px; width: 340px;
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
}
.login-box h1 { margin: 0 0 4px; font-size: 20px; }
.login-box .sub { color: var(--muted); margin: 0 0 24px; font-size: 13px; }
.login-box input {
  width: 100%; padding: 12px 14px; margin-bottom: 14px; font-size: 15px;
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; outline: none;
}
.login-box input:focus { border-color: var(--accent); }
.login-box button {
  width: 100%; padding: 12px; font-size: 15px; font-weight: 600; cursor: pointer;
  background: var(--accent); border: none; border-radius: 8px; color: #fff;
}
.login-box button:hover { filter: brightness(1.1); }
.err { color: var(--red); font-size: 13px; margin-top: 12px; min-height: 16px; }

/* topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; border-bottom: 1px solid var(--border);
  background: var(--panel); position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand .logo { font-size: 22px; }
.brand h1 { font-size: 17px; margin: 0; font-weight: 650; }
.toolbar { display: flex; align-items: center; gap: 12px; }
.ts { color: var(--muted); font-size: 12px; font-family: var(--mono); }
.btn {
  background: var(--panel2); color: var(--text); border: 1px solid var(--border);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 13px; font-weight: 500;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn.ghost { background: transparent; }

/* summary */
main { padding: 20px; max-width: 1500px; margin: 0 auto; }
.summary {
  display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 20px;
}
.stat-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 18px; min-width: 130px;
}
.stat-card .val { font-size: 24px; font-weight: 700; }
.stat-card .lab { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* grid of hosts */
.grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px;
}
.host-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  overflow: hidden; transition: border-color .2s, transform .1s;
}
.host-card:hover { border-color: #3a4553; }
.host-card.offline { opacity: .75; }
.host-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
}
.host-head .name { font-weight: 650; font-size: 15px; }
.host-head .region { color: var(--muted); font-size: 12px; }
.pill {
  padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 700;
  letter-spacing: .3px;
}
.pill.on { background: rgba(63,185,80,.15); color: var(--green); }
.pill.bad { background: rgba(248,81,73,.15); color: var(--red); }
.pill.off { background: rgba(139,148,158,.15); color: var(--muted); }

.host-body { padding: 14px 16px; display: grid; gap: 10px; }
.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.metric {
  background: var(--panel2); border: 1px solid var(--border); border-radius: 9px;
  padding: 8px 10px; text-align: center;
}
.metric .v { font-size: 15px; font-weight: 650; font-family: var(--mono); }
.metric .l { font-size: 10px; color: var(--muted); text-transform: uppercase; letter-spacing: .5px; }
.bar { height: 6px; background: var(--border); border-radius: 4px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--green); border-radius: 4px; }
.bar > i.warn { background: var(--amber); }
.bar > i.crit { background: var(--red); }

.meta { font-size: 12px; color: var(--muted); display: grid; gap: 3px; }
.meta b { color: var(--text); font-family: var(--mono); font-weight: 500; }
.host-foot {
  display: flex; gap: 8px; padding: 12px 16px;
  border-top: 1px solid var(--border);
}
.host-foot .btn.sm { padding: 6px 12px; font-size: 12px; flex: 1; }

/* modal */
.modal {
  position: fixed; inset: 0; background: rgba(0,0,0,.6); backdrop-filter: blur(2px);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal-box {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  width: min(860px, 92vw); max-height: 90vh; display: flex; flex-direction: column;
  box-shadow: 0 30px 80px rgba(0,0,0,.5);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
}
.modal-head h2 { margin: 0; font-size: 16px; }
.modal-head .x {
  background: none; border: none; color: var(--muted); font-size: 26px; cursor: pointer; line-height: 1;
}
.modal-head .x:hover { color: var(--text); }
.modal-body { padding: 20px; overflow: auto; display: grid; gap: 14px; }
.modal-actions { display: flex; gap: 10px; }
.btn.sm.start { color: var(--green); }
.btn.sm.restart { color: var(--amber); }
.btn.sm.stop { color: var(--red); }
textarea#configOut {
  width: 100%; min-height: 200px; resize: vertical;
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: 8px; padding: 12px; font-family: var(--mono); font-size: 12px; line-height: 1.5;
}
pre.traffic {
  background: var(--bg); color: var(--muted); border: 1px solid var(--border);
  border-radius: 8px; padding: 12px; font-family: var(--mono); font-size: 12px;
  overflow: auto; max-height: 220px;
}

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--panel2); border: 1px solid var(--border); color: var(--text);
  padding: 12px 20px; border-radius: 10px; font-size: 13px; z-index: 200;
  box-shadow: 0 10px 30px rgba(0,0,0,.4);
}
.toast.ok { border-color: var(--green); }
.toast.bad { border-color: var(--red); }

/* sections in modal */
.section h3 {
  margin: 0 0 10px; font-size: 13px; text-transform: uppercase;
  color: var(--muted); letter-spacing: .5px; font-weight: 600;
}
.users { display: grid; gap: 6px; margin-bottom: 12px; max-height: 220px; overflow: auto; }
.user-row {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 12px;
}
.user-row .uname { font-family: var(--mono); font-size: 13px; font-weight: 600; }
.user-row .uactions { display: flex; gap: 6px; }
.user-row .btn.tiny { padding: 4px 9px; font-size: 11px; }
.user-add { display: flex; gap: 8px; }
.user-add input {
  flex: 1; padding: 8px 10px; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; font-size: 13px; outline: none;
}
.user-add input:focus { border-color: var(--accent); }
.uri-box {
  font-family: var(--mono); font-size: 11px; color: var(--muted);
  word-break: break-all; background: var(--bg); border-radius: 6px; padding: 6px 8px; margin-top: 6px;
}

/* server modal form */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid label { display: grid; gap: 5px; font-size: 12px; color: var(--muted); }
.form-grid input[type="text"], .form-grid input[type="password"] {
  padding: 9px 11px; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; font-size: 14px; outline: none;
}
.form-grid input:focus { border-color: var(--accent); }
.form-grid .check { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text); }
.form-actions { grid-column: 1 / -1; display: flex; gap: 10px; }
.hint {
  margin-top: 16px; background: var(--panel2); border: 1px solid var(--border);
  border-radius: 8px; padding: 12px; font-size: 12px; color: var(--muted);
}
.hint code { color: var(--accent); }
.hint .pubkey { font-family: var(--mono); word-break: break-all; background: var(--bg); padding: 6px; border-radius: 6px; margin-top: 6px; }