:root {
  color-scheme: light;
  --bg: #eef2f7;
  --card: #ffffff;
  --ink: #172033;
  --muted: #667085;
  --line: #d6dde8;
  --primary: #0f6cbd;
  --success: #15803d;
  --danger: #b42318;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.phone-card {
  width: min(720px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: 0 20px 45px rgba(15, 23, 42, .12);
  padding: 22px;
}
.phone-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}
h1 { margin: 0 0 4px; font-size: 24px; letter-spacing: 0; }
p { margin: 0; color: var(--muted); }
.grid { display: grid; gap: 12px; margin-bottom: 12px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
label { display: grid; gap: 5px; font-size: 13px; color: #344054; font-weight: 650; }
input {
  width: 100%;
  border: 1px solid #c8d2df;
  border-radius: 8px;
  padding: 10px 11px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin: 14px 0; }
button {
  border: 1px solid #aab6c5;
  border-radius: 8px;
  background: #f8fafc;
  color: var(--ink);
  padding: 10px 14px;
  font-weight: 750;
  cursor: pointer;
}
button.primary { background: var(--primary); border-color: var(--primary); color: white; }
button.success { background: var(--success); border-color: var(--success); color: white; }
button.danger { background: var(--danger); border-color: var(--danger); color: white; }
button.ghost { background: #ecfdf3; color: var(--success); }
button:disabled { opacity: .55; cursor: not-allowed; }
hr { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }
.status {
  border-radius: 8px;
  background: #f2f6fb;
  border: 1px solid var(--line);
  padding: 10px 12px;
  color: #344054;
  font-weight: 650;
}
.status-dot {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: #ef4444;
  box-shadow: 0 0 0 4px rgba(239, 68, 68, .16);
  flex: 0 0 auto;
  margin-top: 8px;
}
.status-dot.on { background: #22c55e; box-shadow: 0 0 0 4px rgba(34, 197, 94, .16); }
.log {
  min-height: 130px;
  max-height: 220px;
  overflow: auto;
  white-space: pre-wrap;
  margin: 14px 0 0;
  padding: 12px;
  border-radius: 8px;
  background: #101828;
  color: #d1fadf;
  font: 12px/1.35 Consolas, monospace;
}
audio { display: none; }
@media (max-width: 680px) {
  .grid.two { grid-template-columns: 1fr; }
  .page { padding: 12px; }
  .phone-card { padding: 16px; }
}