/* ==========================================================================
   DeviceSafety — diagnostic-instrument visual language
   Palette: deep navy-charcoal base, restrained teal accent (the "scan"
   color), amber for caution, red for risk, green for confirmed-safe.
   Type: Space Grotesk (display) / Inter (body) / JetBrains Mono (readouts)
   ========================================================================== */

:root {
  --bg:        #0B1220;
  --bg-raise:  #111A2E;
  --bg-panel:  #0E1626;
  --line:      #1F2A44;
  --text:      #E7ECF3;
  --text-dim:  #8A97AE;
  --text-mute: #5B667C;

  --teal:      #2DD4BF;
  --teal-dim:  #17403C;
  --amber:     #F5A524;
  --amber-dim: #453212;
  --red:       #F0554B;
  --red-dim:   #45201D;
  --green:     #34D399;
  --green-dim: #123A2C;

  --radius: 10px;
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 900px 500px at 50% -10%, rgba(45,212,191,0.08), transparent 60%);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--teal); }

/* ---------- topbar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
}
.brand-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-dim);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; } 50% { opacity: .45; }
}
.topbar-note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-mute);
}

main { max-width: 960px; margin: 0 auto; padding: 0 20px 80px; }

/* ---------- hero / gauge ---------- */
.hero {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: center;
  padding: 56px 0 40px;
}
@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 36px; }
  .gauge-wrap { margin: 0 auto; }
}

.gauge-wrap { position: relative; width: 220px; height: 220px; }
.gauge-wrap svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.gauge-track { fill: none; stroke: var(--line); stroke-width: 10; }
.gauge-fill {
  fill: none;
  stroke: var(--teal);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 566;
  stroke-dashoffset: 566;
  transition: stroke-dashoffset 1.1s cubic-bezier(.4,0,.2,1), stroke 0.5s ease;
}
.gauge-sweep {
  position: absolute; inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0deg, rgba(45,212,191,0.35) 18deg, transparent 40deg);
  animation: sweep 1.6s linear infinite;
  opacity: 1;
  transition: opacity .4s ease;
}
.gauge-sweep.done { opacity: 0; }
@keyframes sweep { to { transform: rotate(360deg); } }

.gauge-center {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.gauge-score {
  font-family: var(--font-display);
  font-size: 2.6rem; font-weight: 700; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.gauge-grade {
  font-family: var(--font-mono);
  font-size: 0.78rem; color: var(--text-dim); letter-spacing: 0.08em;
  margin-top: 6px;
}

.hero-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}
.hero-copy p { color: var(--text-dim); margin: 0 0 14px; max-width: 46ch; }
.hero-status {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.8rem;
  color: var(--teal);
  border: 1px solid var(--teal-dim);
  background: rgba(45,212,191,0.06);
  padding: 6px 12px; border-radius: 999px;
}
.hero-status .blink { animation: pulse 1.1s ease-in-out infinite; }

/* ---------- readout panel (signature terminal log) ---------- */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 0;
  margin-bottom: 22px;
  overflow: hidden;
}
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-mute);
  text-transform: uppercase; letter-spacing: 0.08em;
}

.readout-row {
  display: grid;
  grid-template-columns: 20px 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  opacity: 0;
  transform: translateY(4px);
  animation: rowIn .35s ease forwards;
}
.readout-row:last-child { border-bottom: none; }
@keyframes rowIn { to { opacity: 1; transform: translateY(0); } }

.status-dot {
  width: 9px; height: 9px; border-radius: 50%; margin-top: 5px;
}
.status-dot.pass { background: var(--green); box-shadow: 0 0 0 3px var(--green-dim); }
.status-dot.warn { background: var(--amber); box-shadow: 0 0 0 3px var(--amber-dim); }
.status-dot.fail { background: var(--red);   box-shadow: 0 0 0 3px var(--red-dim); }
.status-dot.info { background: var(--text-dim); box-shadow: 0 0 0 3px var(--line); }

.readout-label { font-weight: 600; font-size: 0.92rem; }
.readout-detail {
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-dim);
  margin-top: 3px;
}
.readout-points {
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-mute);
  white-space: nowrap;
}

/* ---------- advice cards ---------- */
.advice-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}
@media (max-width: 640px) { .advice-grid { grid-template-columns: 1fr; } }

.advice-card {
  background: var(--bg-raise);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.advice-card.warn { border-left-color: var(--amber); }
.advice-card.fail { border-left-color: var(--red); }
.advice-card h3 {
  margin: 0 0 6px; font-size: 0.95rem; font-family: var(--font-display);
}
.advice-card p { margin: 0; color: var(--text-dim); font-size: 0.86rem; }

/* ---------- details table ---------- */
.details-table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 0.8rem; }
.details-table tr { border-bottom: 1px solid var(--line); }
.details-table tr:last-child { border-bottom: none; }
.details-table td { padding: 10px 18px; }
.details-table td:first-child { color: var(--text-mute); width: 40%; }
.details-table td:last-child { color: var(--text); word-break: break-all; }

details > summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-mute);
  text-transform: uppercase; letter-spacing: 0.08em;
}
details > summary::-webkit-details-marker { display: none; }
details > summary::after { content: '  ▾'; }
details[open] > summary::after { content: '  ▴'; }

/* ---------- footer / disclaimer ---------- */
.disclaimer {
  font-size: 0.78rem;
  color: var(--text-mute);
  border-top: 1px solid var(--line);
  padding-top: 18px;
  margin-top: 30px;
  line-height: 1.6;
}
.disclaimer strong { color: var(--text-dim); }

footer {
  text-align: center;
  padding: 30px 20px;
  color: var(--text-mute);
  font-size: 0.78rem;
  font-family: var(--font-mono);
}

/* accessibility */
a:focus-visible, summary:focus-visible, button:focus-visible {
  outline: 2px solid var(--teal); outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  .gauge-sweep, .brand-dot, .hero-status .blink, .readout-row { animation: none !important; }
  .readout-row { opacity: 1; transform: none; }
}