:root {
  --background: #1b1f27;
  --panel: #252b36;
  --display: #313948;
  --accent: #3fc1c9;
  --good: #5fd38d;
  --warning: #e8b04a;
  --text: #ffffff;
  --dim: #9aa3b2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  display: flex;
  justify-content: center;
}

main { width: 100%; max-width: 560px; padding: 24px 16px 40px; }

header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.brand { font-size: 24px; font-weight: 700; }
.tag { color: var(--accent); font-weight: 600; letter-spacing: 0.08em; }

.card { background: var(--panel); border-radius: 12px; padding: 24px; }
.caption { margin: 0 0 6px; color: var(--dim); font-size: 13px; font-weight: 700; letter-spacing: 0.06em; }
h1 { margin: 0 0 6px; font-size: 26px; overflow-wrap: anywhere; }
.status { margin: 0 0 20px; color: var(--dim); font-size: 17px; }
.status.good { color: var(--good); }
.status.warning { color: var(--warning); }

button {
  width: 100%;
  padding: 16px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--background);
  font-size: 19px;
  font-weight: 700;
  cursor: pointer;
}
button:disabled { background: var(--display); color: var(--dim); cursor: default; }
button.stop { background: var(--display); color: var(--text); }

.meters { margin: 22px 0 18px; }
canvas { width: 100%; height: 14px; display: block; border-radius: 4px; background: var(--display); }

.volume { display: block; }
input[type=range] { width: 100%; accent-color: var(--accent); }

.details { margin: 16px 0 0; color: var(--dim); font-size: 14px; min-height: 1.2em; }
.foot { color: var(--dim); font-size: 14px; text-align: center; margin-top: 18px; }