:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --bg: #08111f;
  --panel: rgba(15, 29, 49, .88);
  --panel-strong: #10243b;
  --line: rgba(151, 177, 207, .18);
  --text: #f5f8fc;
  --muted: #92a8c0;
  --cyan: #45d6c8;
  --blue: #4a8dff;
  --red: #ff5d6c;
  --green: #37d996;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 15% 0%, #17365c 0, transparent 32%), radial-gradient(circle at 90% 8%, #123b42 0, transparent 30%), var(--bg); color: var(--text); }
button, input, select { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .42; }
.shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 34px 0 60px; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 22px; }
h1, h2, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(1.6rem, 3vw, 2.3rem); letter-spacing: -.04em; }
h2 { margin-bottom: 0; font-size: 1.08rem; }
.eyebrow, .section-label { margin-bottom: 5px; color: var(--cyan); font-size: .7rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.connection { display: flex; gap: 9px; align-items: center; padding: 9px 13px; border: 1px solid var(--line); border-radius: 999px; background: rgba(8, 17, 31, .6); color: var(--muted); font-size: .84rem; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: #687a8e; box-shadow: 0 0 0 4px rgba(104, 122, 142, .12); }
.connection[data-state="online"] .status-dot { background: var(--green); box-shadow: 0 0 0 4px rgba(55, 217, 150, .13); }
.connection[data-state="connecting"] .status-dot { background: #f4bd4f; }
.connection[data-state="error"] .status-dot { background: var(--red); }
.workspace { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 20px; align-items: start; }
.phone-column { display: grid; gap: 20px; }
.panel { border: 1px solid var(--line); border-radius: 22px; background: var(--panel); box-shadow: 0 24px 70px rgba(0, 0, 0, .24); backdrop-filter: blur(18px); }
.settings-panel, .diagnostics-panel { padding: 22px; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 19px; }
.text-button { border: 0; background: none; color: var(--cyan); font-size: .8rem; }
label { display: grid; gap: 7px; margin-bottom: 14px; color: #bdd0e3; font-size: .78rem; font-weight: 650; }
input, select { width: 100%; border: 1px solid var(--line); border-radius: 11px; outline: none; background: #09182a; color: var(--text); padding: 11px 12px; }
input:focus, select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(74, 141, 255, .13); }
.check-row { grid-template-columns: 18px 1fr; align-items: center; font-weight: 500; }
.check-row input { width: 16px; height: 16px; }
.primary-button, .secondary-button, .call-button, .answer-button, .hangup-button { border: 0; border-radius: 12px; padding: 12px 16px; color: white; font-weight: 800; }
.primary-button, .call-button { background: linear-gradient(135deg, #377af4, #4a9dff); }
.secondary-button { border: 1px solid var(--line); background: #142a43; }
.answer-button { background: var(--green); color: #06261b; }
.hangup-button { background: var(--red); }
.full { width: 100%; }
#disconnectButton { margin-top: 9px; }
.devices { margin-top: 28px; padding-top: 21px; border-top: 1px solid var(--line); }
.meter { height: 7px; overflow: hidden; margin: -3px 0 13px; border-radius: 999px; background: #071322; }
.meter span { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--cyan), #f3cf65); transition: width .08s linear; }
.phone-panel { overflow: hidden; }
.agent-strip { display: grid; grid-template-columns: auto 1fr 150px; gap: 12px; align-items: center; padding: 18px 21px; border-bottom: 1px solid var(--line); background: rgba(10, 24, 40, .66); }
.avatar { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 14px; background: linear-gradient(145deg, var(--blue), var(--cyan)); color: #061522; font-weight: 900; }
.agent-strip strong, .agent-strip span { display: block; }
.agent-strip span { margin-top: 2px; color: var(--muted); font-size: .75rem; }
.agent-strip select { padding: 9px 10px; }
.call-display { padding: 38px 22px 17px; text-align: center; }
.call-kicker { margin-bottom: 7px; color: var(--cyan); font-size: .72rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.call-display h2 { font-size: clamp(1.65rem, 5vw, 2.6rem); letter-spacing: -.045em; }
.call-display p:not(.call-kicker) { margin: 8px 0 0; color: var(--muted); }
.call-timer { margin-top: 12px; font-variant-numeric: tabular-nums; color: #cbd9e8; }
.incoming-actions { display: flex; justify-content: center; gap: 12px; padding: 0 20px 22px; }
.incoming-actions button { min-width: 130px; }
.call-controls { display: flex; justify-content: center; gap: 12px; padding: 12px 18px 23px; }
.round-control { width: 74px; height: 64px; border: 1px solid var(--line); border-radius: 17px; background: #10243a; color: var(--text); font-size: .76rem; }
.round-control.active { border-color: var(--cyan); color: var(--cyan); background: rgba(69, 214, 200, .1); }
.dialer { width: min(390px, calc(100% - 32px)); margin: 0 auto; padding: 0 0 30px; }
.dialer > input { text-align: center; font-size: 1.08rem; }
.keypad { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; margin: 16px 0; }
.keypad button { min-height: 54px; border: 1px solid var(--line); border-radius: 14px; background: #0d2035; color: var(--text); font-size: 1.05rem; font-weight: 750; }
.keypad button:active { transform: scale(.97); background: #193653; }
.keypad small { display: block; color: var(--muted); font-size: .5rem; letter-spacing: .13em; }
.call-button { width: 100%; }
#hangupButton { margin-top: 9px; }
.quality-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.quality-grid div { padding: 12px; border: 1px solid var(--line); border-radius: 13px; background: rgba(8, 19, 33, .55); }
.quality-grid span, .quality-grid strong { display: block; }
.quality-grid span { color: var(--muted); font-size: .68rem; }
.quality-grid strong { margin-top: 5px; font-size: .86rem; }
pre { max-height: 150px; overflow: auto; margin: 14px 0 0; padding: 13px; border-radius: 13px; background: #06111e; color: #9fb9d2; white-space: pre-wrap; font: .72rem/1.55 ui-monospace, SFMono-Regular, Consolas, monospace; }
dialog { width: min(390px, calc(100% - 30px)); border: 1px solid var(--line); border-radius: 18px; background: #10243b; color: var(--text); padding: 22px; }
dialog::backdrop { background: rgba(2, 8, 15, .72); backdrop-filter: blur(4px); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }
#remoteAudio { display: none; }

@media (max-width: 850px) {
  .workspace { grid-template-columns: 1fr; }
  .settings-panel { order: 2; }
  .phone-column { order: 1; }
}
@media (max-width: 560px) {
  .shell { width: min(100% - 18px, 1180px); padding-top: 18px; }
  .topbar { align-items: flex-start; }
  .agent-strip { grid-template-columns: auto 1fr; }
  .agent-strip select { grid-column: 1 / -1; }
  .call-controls { gap: 7px; }
  .round-control { width: 68px; }
  .quality-grid { grid-template-columns: repeat(2, 1fr); }
}