:root {
  color-scheme: dark;
  --bg: #07090d;
  --panel: rgba(14, 18, 26, .92);
  --panel-2: #121824;
  --panel-3: #182131;
  --line: #273246;
  --text: #edf4ff;
  --muted: #91a0b7;
  --blue: #7dd3fc;
  --blue-2: #38bdf8;
  --green: #86efac;
  --yellow: #fde68a;
  --red: #fca5a5;
  --purple: #c4b5fd;
  --radius: 18px;
  --shadow: 0 22px 70px rgba(0, 0, 0, .36);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 15% -10%, rgba(56, 189, 248, .14), transparent 35%),
    radial-gradient(circle at 95% 15%, rgba(196, 181, 253, .10), transparent 32%),
    var(--bg);
  color: var(--text);
  font: 15px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
button, input { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.background-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.75), transparent 80%);
}
.shell { width: min(1480px, 100%); margin: 0 auto; padding: 18px; position: relative; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-icon { width: 46px; height: 46px; display: grid; place-items: center; border-radius: 14px; background: linear-gradient(135deg, #0c2637, #111827); border: 1px solid #23516a; color: var(--blue); font-weight: 900; font-size: 24px; box-shadow: inset 0 0 24px rgba(125,211,252,.10); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(1.25rem, 3vw, 1.75rem); }
h2 { margin-bottom: .45rem; font-size: clamp(1.15rem, 2.8vw, 1.65rem); line-height: 1.18; }
.eyebrow { margin-bottom: .25rem; color: var(--blue); font-size: .72rem; letter-spacing: .13em; text-transform: uppercase; font-weight: 800; }
.top-actions, .toolbar-actions, .hero-buttons { display: flex; gap: 9px; align-items: center; flex-wrap: wrap; }
.status-pill { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); background: var(--panel); border-radius: 999px; padding: 8px 12px; color: var(--muted); }
.status-pill i { width: 9px; height: 9px; border-radius: 50%; background: #64748b; box-shadow: 0 0 0 4px rgba(100,116,139,.12); }
.status-pill.connected { color: var(--green); border-color: rgba(134,239,172,.35); }
.status-pill.connected i { background: var(--green); box-shadow: 0 0 0 4px rgba(134,239,172,.13); }
.status-pill.connecting { color: var(--yellow); }
.status-pill.connecting i { background: var(--yellow); animation: pulse 1s infinite alternate; }
.status-pill.error { color: var(--red); border-color: rgba(252,165,165,.35); }
.status-pill.error i { background: var(--red); }
@keyframes pulse { to { opacity: .35; transform: scale(.7); } }

.button, .marker, .segment, .tab, .test-action {
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  padding: 10px 13px;
  border-radius: 12px;
  cursor: pointer;
  transition: transform .15s ease, border-color .15s ease, background .15s ease, opacity .15s ease;
}
.button:hover, .marker:hover, .segment:hover, .tab:hover, .test-action:hover { border-color: var(--blue); }
.button:active, .marker:active, .segment:active, .tab:active, .test-action:active { transform: translateY(1px); }
.button:disabled, .marker:disabled, .segment:disabled, .test-action:disabled { opacity: .42; cursor: not-allowed; transform: none; }
.button.primary { background: linear-gradient(135deg, #0369a1, #0ea5e9); border-color: #38bdf8; color: white; font-weight: 800; }
.button.secondary { background: #162334; border-color: #31506c; }
.button.ghost { background: transparent; }
.button.danger { background: #431923; border-color: #9f334a; color: #fecdd3; }
.button.danger-outline { background: transparent; border-color: #6f2e3c; color: var(--red); }
.button.large { padding: 13px 17px; }
.file-button input { display: none; }
.notice { border: 1px solid rgba(253,230,138,.35); background: rgba(75,57,15,.46); color: #fff2b5; border-radius: 14px; padding: 12px 14px; margin-bottom: 14px; }
.notice.error { color: #fecaca; background: rgba(83,24,35,.55); border-color: rgba(252,165,165,.35); }
.notice.good { color: #bbf7d0; background: rgba(22,78,51,.45); border-color: rgba(134,239,172,.35); }
.hidden { display: none !important; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; backdrop-filter: blur(13px); }
.hero { display: grid; grid-template-columns: 1.3fr .7fr; gap: 18px; align-items: stretch; }
.hero-copy { grid-row: span 2; }
.hero-copy > p:last-child { color: #b8c5d7; max-width: 820px; margin-bottom: 0; }
.model-box { background: var(--panel-2); border: 1px solid var(--line); border-radius: 15px; padding: 12px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.field-label { display: block; font-weight: 800; }
.model-box small { color: var(--muted); display: block; margin-top: 3px; }
.segmented { display: inline-flex; padding: 3px; background: #090d14; border-radius: 12px; border: 1px solid var(--line); }
.segment { min-width: 56px; padding: 8px 12px; background: transparent; border: 0; }
.segment.active { background: #12334a; color: var(--blue); box-shadow: 0 0 0 1px #315c75 inset; }
.protocol-bar { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.protocol-bar div { background: #0c111a; border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.protocol-bar span, .protocol-bar small { display: block; color: var(--muted); font-size: .75rem; }
.protocol-bar strong { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: var(--blue); }
.summary-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 10px; margin: 12px 0; }
.summary-card { background: rgba(14,18,26,.86); border: 1px solid var(--line); border-radius: 14px; padding: 12px; min-width: 0; }
.summary-card span { display: block; color: var(--muted); font-size: .76rem; }
.summary-card strong { display: block; margin-top: 2px; font-size: 1.2rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.muted-value { color: var(--muted); }
.tabs { display: flex; overflow-x: auto; gap: 7px; margin: 14px 0; padding-bottom: 3px; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab { flex: 0 0 auto; background: transparent; color: var(--muted); }
.tab.active { color: white; background: #152235; border-color: #31506c; }
.tab-page { display: none; }
.tab-page.active { display: block; }
.dashboard-layout { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 12px; }
.speed-panel { grid-column: span 4; display: flex; flex-direction: column; gap: 16px; align-items: center; justify-content: center; min-height: 360px; }
.speed-ring { width: min(250px, 75vw); aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center; background: radial-gradient(circle, #0b111b 55%, transparent 56%), conic-gradient(from 215deg, #0ea5e9, #7dd3fc 65%, #1e293b 66%); box-shadow: inset 0 0 40px rgba(56,189,248,.16), 0 0 60px rgba(14,165,233,.08); }
.speed-ring div { text-align: center; }
.speed-ring strong { display: block; font-size: clamp(3rem, 10vw, 5.8rem); letter-spacing: -.08em; line-height: .9; }
.speed-ring span { color: var(--muted); }
.speed-meta { width: 100%; display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; }
.speed-meta div, .profile-values div, .packet-health div { background: var(--panel-2); border: 1px solid var(--line); border-radius: 12px; padding: 10px; }
.speed-meta span, .profile-values span, .packet-health span { display: block; color: var(--muted); font-size: .72rem; }
.telemetry-panel { grid-column: span 8; }
.panel-title { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.confidence { border-radius: 999px; padding: 5px 8px; font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; white-space: nowrap; }
.confidence.high { color: var(--green); background: rgba(22,101,52,.28); border: 1px solid rgba(134,239,172,.24); }
.confidence.medium { color: var(--yellow); background: rgba(113,63,18,.28); border: 1px solid rgba(253,230,138,.24); }
.telemetry-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 9px; }
.telemetry, .unknown-grid > div { background: var(--panel-2); border: 1px solid var(--line); border-radius: 13px; padding: 12px; min-height: 92px; }
.telemetry span, .unknown-grid span { display: block; color: var(--muted); font-size: .74rem; }
.telemetry strong, .unknown-grid strong { display: block; font-size: 1.25rem; margin: 4px 0; }
.telemetry small, .unknown-grid small { color: #77869b; font-size: .68rem; }
.state-on { color: var(--green); }
.state-off { color: var(--muted); }
.state-warn { color: var(--yellow); }
.profile-panel { grid-column: span 5; }
.profile-values { display: grid; gap: 8px; }
.profile-values strong { font-size: 1.4rem; color: var(--blue); }
.profile-values small { color: var(--muted); }
.unknown-panel { grid-column: span 7; }
.unknown-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; }
.packet-panel { grid-column: span 12; }
.packet-health { display: grid; grid-template-columns: repeat(4,1fr); gap: 8px; }
.packet-health strong { font-size: 1.35rem; }
.last-packet { margin-top: 10px; background: #070b11; border: 1px solid var(--line); border-radius: 12px; padding: 10px; overflow: auto; }
.last-packet span { color: var(--muted); display: block; font-size: .72rem; margin-bottom: 4px; }
.last-packet code { white-space: nowrap; color: #c4d7ed; }
.warning-panel { color: #ffefb1; border-color: rgba(253,230,138,.32); }
.test-toolbar, .recorder-panel, .offline-panel { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 12px; }
.active-test-panel { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 12px; border-color: #34506d; }
.active-test-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.test-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 10px; }
.test-card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 14px; display: flex; flex-direction: column; min-height: 250px; box-shadow: var(--shadow); }
.test-card.passed { border-color: rgba(134,239,172,.48); box-shadow: inset 0 0 0 1px rgba(134,239,172,.10), var(--shadow); }
.test-card.active { border-color: var(--blue); }
.test-card.failed { border-color: rgba(252,165,165,.45); }
.test-card header { display: flex; justify-content: space-between; gap: 10px; }
.test-card h3 { margin-bottom: .3rem; }
.test-card p { color: var(--muted); font-size: .86rem; }
.test-status { border-radius: 999px; padding: 4px 7px; font-size: .67rem; height: fit-content; white-space: nowrap; background: var(--panel-3); color: var(--muted); }
.test-card.passed .test-status { color: var(--green); background: rgba(22,101,52,.25); }
.test-card.active .test-status { color: var(--blue); background: rgba(3,105,161,.25); }
.test-evidence { margin-top: auto; background: #0b1018; border: 1px solid var(--line); border-radius: 10px; padding: 9px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: #b6c4d7; font-size: .75rem; min-height: 50px; }
.test-card footer { margin-top: 10px; display: flex; gap: 8px; }
.test-action { width: 100%; }
.marker-panel, .log-panel { margin-top: 12px; }
.marker-grid { display: grid; grid-template-columns: repeat(6, minmax(0,1fr)); gap: 8px; }
.marker { padding: 12px 8px; }
.custom-marker { display: flex; gap: 8px; margin-top: 10px; }
.custom-marker input { flex: 1; min-width: 0; border: 1px solid var(--line); background: #0a0f17; color: var(--text); border-radius: 12px; padding: 11px 12px; }
.log-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.check { color: var(--muted); }
.table-wrap { overflow: auto; max-height: 600px; border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: .78rem; }
th, td { padding: 8px 9px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { position: sticky; top: 0; z-index: 1; background: #111722; color: var(--muted); }
td code { white-space: nowrap; }
.empty { text-align: center; color: var(--muted); padding: 30px; }
.offline-summary { display: grid; grid-template-columns: repeat(4,1fr); gap: 8px; }
.offline-summary > div { background: var(--panel-2); border: 1px solid var(--line); border-radius: 12px; padding: 11px; }
.offline-summary span { color: var(--muted); font-size: .72rem; display: block; }
.offline-summary strong { font-size: 1.2rem; }
.setup-panel ol { color: #c3ccda; padding-left: 1.3rem; }
.setup-panel li { margin-bottom: .7rem; }
.safety-box { background: rgba(22,78,51,.24); border: 1px solid rgba(134,239,172,.25); color: #d4ffe2; border-radius: 14px; padding: 13px; }
.safety-box p { margin: 4px 0 0; }
footer { color: #6f7e94; display: flex; justify-content: space-between; gap: 12px; padding: 18px 3px 8px; font-size: .75rem; }

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1fr; }
  .hero-copy { grid-row: auto; }
  .protocol-bar { grid-column: auto; }
  .summary-grid { grid-template-columns: repeat(3,1fr); }
  .speed-panel, .telemetry-panel, .profile-panel, .unknown-panel { grid-column: span 12; }
  .test-grid { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 700px) {
  .shell { padding: 10px; }
  .topbar { align-items: flex-start; }
  .top-actions { justify-content: flex-end; }
  .top-actions .status-pill { max-width: 155px; }
  .summary-grid { grid-template-columns: repeat(2,1fr); }
  .summary-card:last-child { grid-column: span 2; }
  .hero, .panel { padding: 14px; }
  .model-box, .test-toolbar, .recorder-panel, .offline-panel, .active-test-panel { align-items: stretch; flex-direction: column; }
  .protocol-bar { grid-template-columns: repeat(2,1fr); }
  .telemetry-grid { grid-template-columns: repeat(2,1fr); }
  .unknown-grid { grid-template-columns: repeat(2,1fr); }
  .packet-health { grid-template-columns: repeat(2,1fr); }
  .test-grid { grid-template-columns: 1fr; }
  .marker-grid { grid-template-columns: repeat(3,1fr); }
  .offline-summary { grid-template-columns: repeat(2,1fr); }
  .speed-meta { grid-template-columns: 1fr; }
  footer { flex-direction: column; }
}

@media (max-width: 410px) {
  .brand-icon { display: none; }
  .top-actions { width: 100%; }
  .topbar { flex-wrap: wrap; }
  .telemetry-grid, .unknown-grid, .marker-grid { grid-template-columns: repeat(2,1fr); }
}

/* Simple FFF1 mode + light controls */
.write-intro-panel { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 12px; }
.write-status-grid { min-width: min(100%, 440px); display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; }
.write-status-grid > div, .device-info-grid > div { background: var(--panel-2); border: 1px solid var(--line); border-radius: 12px; padding: 10px; min-width: 0; }
.write-status-grid span, .device-info-grid span { display: block; color: var(--muted); font-size: .7rem; }
.write-status-grid strong, .device-info-grid strong { display: block; margin-top: 4px; overflow-wrap: anywhere; }
.simple-write-panel { margin-bottom: 12px; }
.simple-write-header { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.toggle-switch { display: flex; align-items: center; gap: 10px; cursor: pointer; user-select: none; white-space: nowrap; }
.toggle-switch input { position: absolute; opacity: 0; pointer-events: none; }
.toggle-track { width: 58px; height: 32px; border-radius: 999px; background: #273142; border: 1px solid var(--line); padding: 3px; transition: .18s ease; display: inline-flex; align-items: center; }
.toggle-track i { width: 24px; height: 24px; border-radius: 50%; background: #a4afbf; transition: .18s ease; box-shadow: 0 2px 8px rgba(0,0,0,.4); }
.toggle-switch input:checked + .toggle-track { background: rgba(52,211,153,.28); border-color: rgba(52,211,153,.7); }
.toggle-switch input:checked + .toggle-track i { transform: translateX(26px); background: var(--green); }
.toggle-switch input:disabled + .toggle-track { opacity: .45; }
.command-availability-note { margin: 14px 0 0; border-radius: 11px; padding: 10px 12px; font-size: .82rem; }
.command-availability-note.pending { background: rgba(245,158,11,.10); border: 1px solid rgba(245,158,11,.25); color: #fbd38d; }
.command-availability-note.ready { background: rgba(52,211,153,.10); border: 1px solid rgba(52,211,153,.25); color: #b7f7d7; }
.simple-command-grid { margin-top: 12px; display: grid; grid-template-columns: 1.35fr .8fr; gap: 12px; }
.control-group { background: var(--panel-2); border: 1px solid var(--line); border-radius: 14px; padding: 13px; }
.mode-control-row { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 9px; }
.light-control-row { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px; }
.control-command { min-height: 86px; border: 1px solid var(--line); border-radius: 13px; background: #0b111a; color: var(--text); padding: 13px 10px; cursor: pointer; display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 7px; transition: .15s ease; }
.control-command span { font-weight: 800; font-size: 1rem; }
.control-command small { color: var(--muted); font-family: ui-monospace,SFMono-Regular,Menlo,monospace; font-size: .63rem; overflow-wrap: anywhere; }
.control-command:not(:disabled):hover { transform: translateY(-1px); border-color: var(--blue); background: rgba(56,189,248,.08); }
.control-command:disabled { cursor: not-allowed; opacity: .48; }
.read-panel, .write-history-panel { margin-top: 12px; }
.read-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.device-info-grid { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 8px; }
.write-result { text-transform: uppercase; font-size: .72rem; }
.write-result.passed { color: var(--green); }
.write-result.review, .write-result.sent, .write-result.pending { color: var(--yellow); }
.write-result.failed { color: var(--red); }

@media (max-width: 1050px) {
  .write-intro-panel { flex-direction: column; }
  .write-status-grid { width: 100%; }
  .device-info-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
}

@media (max-width: 700px) {
  .write-status-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .simple-write-header { align-items: stretch; flex-direction: column; }
  .toggle-switch { justify-content: space-between; padding: 12px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 12px; }
  .simple-command-grid { grid-template-columns: 1fr; }
  .device-info-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 430px) {
  .write-status-grid { grid-template-columns: 1fr; }
  .mode-control-row { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .control-command { min-height: 78px; padding: 10px 6px; }
  .control-command small { display: none; }
}