:root {
  --bg: #f4f6f9; --panel: #ffffff; --text: #17202c; --muted: #5d6b7c; --line: #dfe4ea;
  --accent: #0b63ce; --accent-ink: #ffffff;
  --ok: #16833a; --ok-bg: #e3f5e8; --warn: #9a6200; --warn-bg: #fff3d6;
  --bad: #c62828; --bad-bg: #fde7e7; --off: #56606d; --off-bg: #eceff3;
  --code-bg: #0f1720; --code-ink: #d7e2ee;
  --radius: 10px; --shadow: 0 1px 3px rgba(20, 30, 45, .08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f141a; --panel: #171e27; --text: #e5ebf2; --muted: #93a1b1; --line: #2a3441;
    --accent: #4b9bff; --accent-ink: #06121f;
    --ok: #54d37d; --ok-bg: #133321; --warn: #f2bb4b; --warn-bg: #3a2c0c;
    --bad: #ff7b7b; --bad-bg: #3d1717; --off: #a3aebb; --off-bg: #232c37;
    --code-bg: #0a0e13; --code-ink: #cfdbe7; --shadow: none;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
button, input, select { font: inherit; color: inherit; }
.hidden { display: none !important; }
h1, h2, h3 { margin: 0 0 .4em; line-height: 1.2; }
h2 { font-size: 1.3rem; } h3 { font-size: 1.05rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
code, pre, .mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: .86rem; }

/* top bar */
.topbar { position: sticky; top: 0; z-index: 5; display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center;
  padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 1.05rem; cursor: pointer; }
.brand span { color: var(--accent); }
.demo-badge { background: var(--warn-bg); color: var(--warn); border-radius: 99px; padding: 2px 10px; font-size: .78rem; font-weight: 600; }
nav { display: flex; gap: 4px; flex-wrap: wrap; }
nav button { background: none; border: 0; padding: 6px 10px; border-radius: 8px; cursor: pointer; color: var(--muted); }
nav button.active { background: var(--off-bg); color: var(--text); font-weight: 600; }
.me { margin-left: auto; display: flex; gap: 10px; align-items: center; font-size: .9rem; }
.role { background: var(--off-bg); padding: 1px 8px; border-radius: 99px; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; }
button.link { background: none; border: 0; color: var(--accent); cursor: pointer; padding: 0; }

main { max-width: 1240px; margin: 0 auto; padding: 18px 16px 60px; }

/* generic */
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.btn { border: 1px solid var(--line); background: var(--panel); padding: 7px 14px; border-radius: 8px; cursor: pointer; white-space: nowrap; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.btn.danger { background: var(--bad); color: #fff; border-color: var(--bad); font-weight: 600; }
.btn.small { padding: 4px 10px; font-size: .85rem; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
input[type=text], input[type=password], select, textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); }
input:focus, select:focus, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
label { display: block; font-size: .85rem; color: var(--muted); margin: 10px 0 4px; }
.help { font-size: .78rem; color: var(--muted); margin-top: 3px; }

.badge { display: inline-block; padding: 1px 9px; border-radius: 99px; font-size: .78rem; font-weight: 600; white-space: nowrap; }
.b-up { background: var(--ok-bg); color: var(--ok); }
.b-down { background: var(--bad-bg); color: var(--bad); }
.b-admin-down, .b-no-sfp { background: var(--off-bg); color: var(--off); }
.b-err-disabled, .b-warning { background: var(--warn-bg); color: var(--warn); }
.b-ok { background: var(--ok-bg); color: var(--ok); }
.b-error, .b-denied, .b-invalid { background: var(--bad-bg); color: var(--bad); }
.b-lock { background: var(--warn-bg); color: var(--warn); }

/* login */
.login { max-width: 360px; margin: 10vh auto; }
.login h1 { font-size: 1.4rem; }
.login .btn { width: 100%; margin-top: 16px; padding: 10px; }
.err { color: var(--bad); font-size: .9rem; margin-top: 10px; min-height: 1.2em; }

/* dashboard */
.dev-card h3 { font-size: 1.1rem; margin: 0; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 14px 0; }
.stat { background: var(--bg); border-radius: 8px; padding: 8px 10px; }
.stat b { display: block; font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.stat span { font-size: .78rem; color: var(--muted); }
.stat.bad b { color: var(--bad); } .stat.ok b { color: var(--ok); }
.alert { background: var(--bad-bg); color: var(--bad); border-radius: 8px; padding: 8px 10px; font-size: .88rem; margin-bottom: 10px; }

/* device page */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 14px 0 16px; overflow-x: auto; }
.tabs button { background: none; border: 0; border-bottom: 2px solid transparent; padding: 8px 14px; cursor: pointer; color: var(--muted); white-space: nowrap; }
.tabs button.active { border-color: var(--accent); color: var(--text); font-weight: 600; }
.filters { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0; }
.chip { border: 1px solid var(--line); background: var(--panel); border-radius: 99px; padding: 3px 12px; cursor: pointer; font-size: .85rem; }
.chip.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.table-wrap { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); background: var(--bg); position: sticky; top: 0; }
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: var(--bg); }
td.num { font-variant-numeric: tabular-nums; text-align: right; }

.actions-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.action-card h3 { margin-bottom: 2px; }
.action-card .hi { font-size: .82rem; color: var(--muted); margin-bottom: 8px; }
.action-card .btn { margin-top: 12px; }
.kind { font-size: .7rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.lock-note { font-size: .8rem; color: var(--muted); margin-top: 8px; }

.port-actions { display: grid; gap: 8px; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); margin-top: 12px; }
.port-actions .btn { text-align: left; white-space: normal; }
.port-actions .btn small { display: block; color: var(--muted); font-weight: 400; }
.port-actions .btn.primary small, .port-actions .btn.danger small { color: inherit; opacity: .85; }

/* output */
pre.out { background: var(--code-bg); color: var(--code-ink); padding: 12px; border-radius: 8px; overflow: auto; max-height: 60vh; white-space: pre; margin: 8px 0 0; }
.cmd-list { background: var(--code-bg); color: #9fe7a8; padding: 10px 12px; border-radius: 8px; margin: 8px 0; white-space: pre-wrap; }
.warn-box { background: var(--warn-bg); color: var(--warn); border-radius: 8px; padding: 10px 12px; margin: 10px 0; font-weight: 500; }
.danger-box { background: var(--bad-bg); color: var(--bad); border-radius: 8px; padding: 10px 12px; margin: 10px 0; font-weight: 600; }
.diff { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.diff pre.out { max-height: 280px; }

/* modal */
.modal-back { position: fixed; inset: 0; background: rgba(8, 12, 18, .55); display: flex; align-items: flex-start; justify-content: center; padding: 5vh 12px; z-index: 20; overflow-y: auto; }
.modal { background: var(--panel); border-radius: 12px; width: 100%; max-width: 880px; box-shadow: 0 10px 40px rgba(0,0,0,.3); }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.modal-head h3 { margin: 0; }
.modal-body { padding: 16px 18px 20px; }
button.icon { background: none; border: 0; font-size: 1.1rem; cursor: pointer; color: var(--muted); }

.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 8px; z-index: 30; max-width: 90vw; }
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 640px) {
  .me { margin-left: 0; width: 100%; }
  .diff { grid-template-columns: 1fr; }
  th, td { padding: 7px 8px; }
  .hide-sm { display: none; }
}

textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); font-family: ui-monospace, Menlo, Consolas, monospace; font-size: .86rem; resize: vertical; }
.form-grid { display: grid; gap: 0 14px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
label.check { display: flex; gap: 8px; align-items: center; color: var(--text); margin: 14px 0 6px; }
.form-actions { margin-top: 14px; }
.ok-box { background: var(--ok-bg); color: var(--ok); border-radius: 8px; padding: 10px 12px; margin: 10px 0; font-weight: 600; }
.admin-row { margin-top: 14px; padding-top: 12px; border-top: 1px dashed var(--line); }
img.qr { display: block; width: 220px; height: 220px; margin: 12px auto; background: #fff; border-radius: 8px; padding: 6px; }
.login form .btn { width: 100%; margin-top: 14px; }

.optic { font-weight: 600; }
.optic-ok { color: var(--ok); } .optic-warn { color: var(--warn); } .optic-bad { color: var(--bad); }