:root {
  color-scheme: dark;
  --bg: #090b0d;
  --surface: #111519;
  --surface-raised: #171c21;
  --line: #2a3138;
  --text: #f4f7f8;
  --muted: #8e9aa5;
  --green: #38d996;
  --green-strong: #1fb477;
  --amber: #f2bd57;
  --red: #ef5f62;
  --red-strong: #ce454b;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

button, input { font: inherit; letter-spacing: 0; }

.dialer-shell {
  width: min(100%, 520px);
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(20px, env(safe-area-inset-top)) 20px max(24px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { font-size: 20px; font-weight: 720; }

.line-label {
  margin-top: 3px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.status-pill {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

.status-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--muted);
}

.status-pill[data-state="ready"] .status-dot,
.status-pill[data-state="connected"] .status-dot { background: var(--green); }
.status-pill[data-state="working"] .status-dot { background: var(--amber); }
.status-pill[data-state="error"] .status-dot { background: var(--red); }

.call-surface,
.pairing-surface {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 0;
}

[hidden] { display: none !important; }

h1 {
  margin: 0 0 32px;
  font-size: 28px;
  line-height: 1.15;
  font-weight: 680;
}

label {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

.number-input,
.pairing-input {
  width: 100%;
  height: 64px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  outline: none;
  background: var(--surface);
  color: var(--text);
  font-size: 26px;
}

.pairing-input {
  height: 54px;
  margin-bottom: 18px;
  font-size: 18px;
}

.pairing-input:first-of-type {
  font-variant-numeric: tabular-nums;
  text-transform: uppercase;
}

.number-input:focus,
.pairing-input:focus {
  border-color: var(--green-strong);
  box-shadow: 0 0 0 3px rgb(56 217 150 / 16%);
}

.number-input:disabled { color: var(--muted); opacity: .75; }

.primary-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}

.command {
  height: 52px;
  border: 0;
  border-radius: 6px;
  color: #06110c;
  font-weight: 720;
  cursor: pointer;
  touch-action: manipulation;
}

.command.call { background: var(--green); }
.command.pair { margin-top: 2px; background: var(--green); }
.command.call:active { background: var(--green-strong); }
.command.hangup { background: var(--red); color: #fff; }
.command.hangup:active { background: var(--red-strong); }
.command:disabled { cursor: default; opacity: .36; }

.paired-row {
  min-height: 32px;
  margin: -20px 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
}

.paired-row button {
  border: 0;
  padding: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.keypad {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 28px;
}

.keypad button {
  aspect-ratio: 1.55;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-raised);
  color: var(--text);
  font-size: 20px;
  font-weight: 650;
  cursor: pointer;
  touch-action: manipulation;
}

.keypad button:active:not(:disabled) { background: #222a31; }
.keypad button:disabled { cursor: default; opacity: .34; }

.connection-row {
  height: 18px;
  margin-top: 24px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 5px;
}

.connection-row span {
  width: 3px;
  height: 5px;
  background: var(--line);
}

body[data-call-state="connected"] .connection-row span { background: var(--green-strong); }
body[data-call-state="connected"] .connection-row span:nth-child(2) { height: 9px; }
body[data-call-state="connected"] .connection-row span:nth-child(3) { height: 13px; }
body[data-call-state="connected"] .connection-row span:nth-child(4) { height: 17px; }

@media (max-height: 620px) {
  .dialer-shell { gap: 16px; }
  .call-surface { justify-content: flex-start; }
  h1 { margin-bottom: 18px; font-size: 24px; }
  .keypad { margin-top: 18px; gap: 8px; }
  .keypad button { min-height: 42px; }
  .connection-row { margin-top: 12px; }
}

@media (min-width: 700px) {
  .dialer-shell { padding-left: 32px; padding-right: 32px; }
}

@media (prefers-reduced-motion: no-preference) {
  .status-pill[data-state="working"] .status-dot { animation: pulse 1.2s ease-in-out infinite; }
  @keyframes pulse { 50% { opacity: .38; } }
}