:root {
  --bg: #070d18;
  --card: #0d1729;
  --line: #1d2b45;
  --text: #e8f0fa;
  --muted: #8ea3bf;
  --ice: #5cc8ff;
  --ice-dim: #1f4f70;
  --alert: #ff4d4d;
  --ok: #3ddc84;
  --radius: 14px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); }
body { font: 15px/1.4 "Segoe UI", system-ui, -apple-system, Roboto, sans-serif; }
button, input, select { font: inherit; color: inherit; }
h2 { margin: 0 0 12px; font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
h2 small { text-transform: none; letter-spacing: 0; font-weight: 400; }
.muted { color: var(--muted); margin: 0; }
dl { margin: 0; }
dt { color: var(--muted); font-size: 13px; }
dd { margin: 2px 0 0; font-variant-numeric: tabular-nums; }

/* header */
.top { display: flex; align-items: center; gap: 16px; padding: 12px 20px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.logo { height: 64px; width: auto; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; flex: 1; }
.chip { padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.chip.on { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 50%, transparent); }
.chip.bad { color: var(--alert); border-color: color-mix(in srgb, var(--alert) 50%, transparent); }
.logout { color: var(--muted); font-size: 13px; }

/* layout */
.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; padding: 20px; max-width: 1400px; margin: 0 auto; }
.s4 { grid-column: span 4; } .s6 { grid-column: span 6; } .s8 { grid-column: span 8; } .s12 { grid-column: span 12; }
@media (max-width: 1000px) { .s4, .s6, .s8 { grid-column: span 12; } }
.view[hidden] { display: none; }
h3 { margin: 18px 0 10px; font-size: 13px; font-weight: 600; color: var(--muted); }
.small { font-size: 13px; }

/* tabs */
.tabs { display: flex; gap: 4px; padding: 12px 20px 0; max-width: 1400px; margin: 0 auto; border-bottom: 1px solid var(--line); }
.tabs button { background: none; border: none; border-bottom: 2px solid transparent; border-radius: 0; padding: 10px 16px; color: var(--muted); font-weight: 600; }
.tabs button[aria-selected="true"] { color: var(--text); border-bottom-color: var(--ice); }

/* key/value lists */
.kv { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px 20px; margin-top: 12px; }
.kv dd { font-size: 18px; word-break: break-word; }

/* flags */
.flags { display: flex; flex-wrap: wrap; gap: 8px; }
.flag { padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.flag.on { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 50%, transparent); }
.flag.on::before { content: "● "; }
.flag::before { content: "○ "; }

/* AF chips, EON table */
.aflist { display: flex; flex-wrap: wrap; gap: 6px; }
.af { padding: 3px 9px; border-radius: 6px; background: #0a1322; border: 1px solid var(--line); font-variant-numeric: tabular-nums; font-size: 14px; }
.af.cur { border-color: var(--ice); color: var(--ice); }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th { text-align: left; color: var(--muted); font-weight: 600; font-size: 12px; padding: 6px 8px; border-bottom: 1px solid var(--line); }
.table td { padding: 6px 8px; border-bottom: 1px solid color-mix(in srgb, var(--line) 50%, transparent); font-variant-numeric: tabular-nums; }

/* group statistics */
.groups { display: grid; gap: 6px; }
.grow { display: grid; grid-template-columns: 44px 1fr 150px; gap: 12px; align-items: center; font-size: 14px; }
.grow b { font-variant-numeric: tabular-nums; }
.grow .meterbar { height: 12px; }
.grow small { color: var(--muted); }

/* meter rows */
.meters { display: grid; gap: 10px; }
.mrow { display: grid; grid-template-columns: 140px 1fr 64px; gap: 12px; align-items: center; font-size: 14px; }
.mrow b { text-align: right; font-variant-numeric: tabular-nums; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; min-width: 0; }

/* frequency */
.freq-value { font-size: 52px; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.1; }
.freq-value small, .hero small { font-size: 18px; color: var(--muted); margin-left: 6px; font-weight: 400; }
.tune { display: flex; gap: 8px; margin: 14px 0; flex-wrap: wrap; }
.tune input { width: 100px; }
button, input, select { background: #0a1322; border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; }
button { cursor: pointer; }
button:hover { border-color: var(--ice-dim); }
button.primary { background: var(--ice-dim); border-color: var(--ice-dim); }
.bwsel { display: flex; flex-direction: column; gap: 6px; color: var(--muted); font-size: 13px; }
.bwsel select { color: var(--text); max-width: 220px; }

/* signal */
.signal-top { display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; }
.quality { margin: 0; font-size: 15px; color: var(--muted); }
.quality b { color: var(--text); }
.meterbar { position: relative; height: 14px; background: #0a1322; border-radius: 4px; overflow: hidden; }
.signal .meterbar { height: 16px; margin: 16px 0 4px; }
.meterfill { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--ice); border-radius: 0 4px 4px 0; transition: width .15s linear; }
.scale { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); margin-bottom: 18px; font-variant-numeric: tabular-nums; }
.scale .lim { color: var(--alert); }
.freq-value { font-size: 40px; }

/* rds */
.rds-row { display: flex; align-items: center; gap: 40px; flex-wrap: wrap; }
.rds-row .rds-meta { margin: 0; }
.ps { font-size: 64px; font-weight: 700; letter-spacing: .08em; font-family: Consolas, "Cascadia Mono", monospace; white-space: pre; min-height: 80px; line-height: 1.2; }
.rds-meta { display: flex; gap: 28px; margin: 10px 0; }
.rds-meta dd { font-size: 20px; }
.rt { margin: 12px 0 0; color: var(--text); min-height: 30px; font-size: 22px; }

/* deviation */
.hero { font-size: 72px; font-weight: 700; line-height: 1; font-variant-numeric: tabular-nums; }
.hero.over { color: var(--alert); }
.hero.small { font-size: 44px; }
.warn { color: #ffb347; margin: 8px 0 0; font-size: 13px; }
.devbar { position: relative; height: 14px; background: #0a1322; border-radius: 4px; margin: 18px 0 4px; overflow: hidden; }
.devfill { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--ice); border-radius: 0 4px 4px 0; transition: width .08s linear; }
.devover { position: absolute; top: 0; bottom: 0; left: calc(75 / 90 * 100%); width: 0; background: var(--alert); transition: width .08s linear; }
.devlimit { position: absolute; top: 0; bottom: 0; left: calc(75 / 90 * 100%); width: 2px; background: var(--alert); }
.stats { display: flex; gap: 28px; align-items: end; margin-top: 16px; }
.stats dd { font-size: 20px; }
.stats dd.over { color: var(--alert); }

/* signal tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 14px; }
.tiles dd { font-size: 24px; font-weight: 600; }

/* charts */
.chartbox { position: relative; height: 220px; }
.chartbox.small { height: 170px; }
.chartbox canvas { width: 100%; height: 100%; display: block; }
.tip { position: absolute; pointer-events: none; background: #050a14; border: 1px solid var(--line); border-radius: 6px; padding: 4px 8px; font-size: 13px; white-space: nowrap; font-variant-numeric: tabular-nums; }

/* login */
body.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; width: min(420px, 100%); display: flex; flex-direction: column; gap: 10px; }
.login-logo { width: 100%; height: auto; margin-bottom: 10px; }
.login-card label { color: var(--muted); font-size: 13px; }
.login-card button { background: var(--ice-dim); border-color: var(--ice-dim); margin-top: 6px; }
.login-error { color: var(--alert); margin: 0; }

@media (max-width: 600px) {
  .grid { padding: 12px; gap: 12px; }
  .logo { height: 48px; }
  .hero { font-size: 56px; }
  .ps { font-size: 40px; min-height: 52px; }
  .rt { font-size: 17px; }
}

/* settings */
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.settinggroups { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 16px; }
.settings { display: grid; gap: 10px; }
.srow { display: grid; grid-template-columns: 1fr 170px; gap: 12px; align-items: center; font-size: 14px; }
.srow select, .srow input[type="number"] { width: 100%; }
.srow.saving { opacity: .6; }
.switch { display: inline-flex; gap: 8px; align-items: center; cursor: pointer; }
.switch input { width: 18px; height: 18px; accent-color: var(--ice); }
.wifilist { display: grid; gap: 4px; margin-top: 12px; }
.wifilist button { display: flex; justify-content: space-between; text-align: left; }
.wifiform { display: grid; gap: 10px; margin-top: 14px; }
.wifiform label, .adminpw { display: grid; gap: 4px; color: var(--muted); font-size: 13px; }
.wifiform input, .adminpw input { color: var(--text); }
button.danger { border-color: color-mix(in srgb, var(--alert) 60%, transparent); color: var(--alert); }