:root {
  --bg: #1b1b1f;
  --body: #2c2c33;
  --key: #444450;
  --key-active: #6a6a7a;
  --text: #f2f2f2;
  --accent: #3fb950;
  --danger: #d9534f;
  --display-bg: #0d1a0d;
  --display-text: #7CFC00;
  --radius: 14px;
  --font: system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
}

.phone {
  width: min(92vw, 340px);
  padding: 20px;
  background: var(--body);
  border-radius: calc(var(--radius) * 1.5);
}

.phone-selector { margin-bottom: 16px; }
.phone-selector label { display: block; margin-bottom: 6px; font-size: 0.9rem; }
.phone-selector select {
  width: 100%;
  padding: 10px;
  color: var(--text);
  background: var(--key);
  border: 0;
  border-radius: 8px;
  font: inherit;
}
.phone-selector select:disabled { opacity: 0.6; }

.display {
  min-height: 3rem;
  padding: 10px 14px;
  background: var(--display-bg);
  color: var(--display-text);
  font: 1.8rem monospace;
  text-align: right;
  border-radius: 8px;
  overflow: hidden;
}

.status {
  min-height: 1.4rem;
  margin: 8px 0 14px;
  font-size: 0.9rem;
  text-align: center;
  opacity: 0.8;
}

.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

button {
  font-family: inherit;
  color: var(--text);
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
  touch-action: manipulation;
}

.keypad button {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1.2;
  background: var(--key);
  font-size: 1.8rem;
}

.keypad button small { font-size: 0.6rem; opacity: 0.6; letter-spacing: 1px; }
.keypad button.active, .keypad button:active { background: var(--key-active); }

.actions { display: flex; gap: 10px; margin-top: 14px; }
.actions button { flex: 1; padding: 14px; font-size: 1rem; }
.pickup { background: var(--accent); }

.version {
  position: fixed;
  right: 8px;
  bottom: 6px;
  font-size: 0.7rem;
  opacity: 0.4;
}
.hangup { background: var(--danger); }