:root {
  --bg-1: #0f1420;
  --bg-2: #1a2236;
  --card: #151b2c;
  --card-border: #262f47;
  --text: #e8ecf6;
  --text-dim: #8891a8;
  --accent: #5b8cff;
  --accent-dim: #33406b;
  --listening: #34d399;
  --speaking: #f0b429;
  --danger: #e5484d;
  --danger-hover: #ff5c60;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at 50% -10%, var(--bg-2), var(--bg-1) 60%);
  color: var(--text);
}

.card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 40px 32px 32px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

h1 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 6px;
}

.subtitle {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin: 0 0 36px;
  line-height: 1.4;
}

.stage {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.call-button {
  position: relative;
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: white;
  transition: background 0.2s ease, transform 0.15s ease;
}

.call-button:hover {
  transform: scale(1.04);
}

.call-button:active {
  transform: scale(0.97);
}

.call-button:disabled {
  cursor: wait;
  opacity: 0.7;
  transform: none;
}

.call-button svg {
  position: relative;
  z-index: 1;
}

.ring {
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  opacity: 0;
}

/* Connecting: spinning dashed ring */
.card[data-state="connecting"] .ring {
  opacity: 1;
  border-style: dashed;
  animation: spin 1.2s linear infinite;
}

/* Connected + quiet: slow steady breathing ring */
.card[data-state="connected"] .ring {
  opacity: 0.6;
  animation: breathe 2.4s ease-in-out infinite;
}

/* User speaking: green pulse, faster */
.card[data-state="user-speaking"] .call-button {
  background: var(--listening);
}
.card[data-state="user-speaking"] .ring {
  opacity: 1;
  border-color: var(--listening);
  animation: pulse 0.9s ease-out infinite;
}

/* Bot speaking: amber pulse */
.card[data-state="bot-speaking"] .call-button {
  background: var(--speaking);
}
.card[data-state="bot-speaking"] .ring {
  opacity: 1;
  border-color: var(--speaking);
  animation: pulse 0.9s ease-out infinite;
}

.card[data-state="connecting"] .call-button,
.card[data-state="connected"] .call-button,
.card[data-state="user-speaking"] .call-button,
.card[data-state="bot-speaking"] .call-button {
  background: var(--danger);
}
.card[data-state="connecting"] .call-button:hover,
.card[data-state="connected"] .call-button:hover,
.card[data-state="user-speaking"] .call-button:hover,
.card[data-state="bot-speaking"] .call-button:hover {
  background: var(--danger-hover);
}

.card[data-state="error"] .call-button {
  background: var(--accent-dim);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes breathe {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.35;
  }
  50% {
    transform: scale(1.08);
    opacity: 0.7;
  }
}

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

.status {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-dim);
  min-height: 1.3em;
}

.card[data-state="error"] .status {
  color: var(--danger);
}