:root {
  --bg: #0f1115;
  --card-bg: #171a21;
  --accent: #6c5ce7;
  --accent-soft: rgba(108, 92, 231, 0.25);
  --green: #2ecc71;
  --red: #e74c3c;
  --text: #eef0f5;
  --text-dim: #9aa0ac;
  --border: #262a35;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at top, #1a1d27, #0f1115 60%);
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  padding: 24px;
}

.card {
  width: 100%;
  max-width: 420px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 32px 28px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

.header {
  text-align: center;
  margin-bottom: 12px;
}

.avatar {
  position: relative;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #3d3a8f);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
  margin: 0 auto 16px;
}

.pulse-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  opacity: 0;
}

.avatar.talking .pulse-ring {
  animation: pulse 1.4s ease-out infinite;
}

.avatar.connecting .pulse-ring {
  animation: pulse 1s ease-out infinite;
  border-color: var(--text-dim);
}

@keyframes pulse {
  0% {
    transform: scale(0.9);
    opacity: 0.8;
  }
  100% {
    transform: scale(1.35);
    opacity: 0;
  }
}

h1 {
  font-size: 20px;
  margin: 0 0 4px;
  font-weight: 600;
}

.subtitle {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
}

.timer {
  text-align: center;
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 1px;
  margin: 18px 0;
  color: var(--text-dim);
}

.controls {
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
}

.call-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border: none;
  border-radius: 999px;
  background: var(--green);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, opacity 0.2s ease;
}

.call-btn:hover {
  transform: translateY(-1px);
}

.call-btn:active {
  transform: translateY(0);
}

.call-btn.active {
  background: var(--red);
}

.call-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.transcript-wrapper {
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
}

.transcript-header {
  padding: 10px 14px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  background: #1c2029;
  border-bottom: 1px solid var(--border);
}

.transcript {
  max-height: 240px;
  overflow-y: auto;
  padding: 14px;
  font-size: 14px;
  line-height: 1.5;
}

.transcript .placeholder {
  color: var(--text-dim);
  margin: 0;
  font-style: italic;
}

.transcript .line {
  margin: 0 0 10px;
}

.transcript .line:last-child {
  margin-bottom: 0;
}

.transcript .speaker {
  font-weight: 600;
  margin-right: 6px;
}

.transcript .speaker.agent {
  color: var(--accent);
}

.transcript .speaker.user {
  color: var(--green);
}

.error-banner {
  margin-top: 16px;
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(231, 76, 60, 0.15);
  border: 1px solid rgba(231, 76, 60, 0.4);
  color: #ff8a80;
  font-size: 13px;
}

.hidden {
  display: none;
}