:root {
  --bg-start: #07121f;
  --bg-mid: #12263f;
  --bg-end: #0b1624;
  --ring-idle: rgba(182, 209, 255, 0.28);
  --ring-listening: rgba(117, 216, 255, 0.8);
  --ring-thinking: rgba(255, 216, 142, 0.8);
  --ring-speaking: rgba(150, 255, 198, 0.95);
  --ring-error: rgba(255, 120, 120, 0.85);
  --panel: rgba(5, 12, 20, 0.5);
}

* {
  box-sizing: border-box;
  user-select: none;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background:
    radial-gradient(circle at top, rgba(80, 121, 175, 0.3), transparent 35%),
    linear-gradient(
      180deg,
      var(--bg-start) 0%,
      var(--bg-mid) 45%,
      var(--bg-end) 100%
    );
}

body {
  font-family: 'Segoe UI', sans-serif;
  touch-action: manipulation;
}

.app-shell {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

.ambient {
  position: absolute;
  inset: auto;
  border-radius: 999px;
  filter: blur(80px);
  opacity: 0.75;
  pointer-events: none;
}

.ambient-top {
  top: -12vh;
  left: -8vw;
  width: 34vw;
  height: 34vw;
  background: rgba(105, 176, 255, 0.2);
}

.ambient-bottom {
  right: -6vw;
  bottom: -14vh;
  width: 30vw;
  height: 30vw;
  background: rgba(127, 255, 219, 0.16);
}

.session-close {
  position: absolute;
  top: 24px;
  right: 24px;
  z-index: 6;
  height: 44px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(8, 18, 31, 0.72);
  color: rgba(236, 244, 255, 0.92);
  font: inherit;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  backdrop-filter: blur(10px);
  cursor: pointer;
}

.session-close-hidden {
  display: none;
}

.avatar-stage {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}

.avatar-container {
  position: relative;
  width: min(82vw, 980px);
  height: min(90vh, 1080px);
  z-index: 2;
}

.avatar-ring {
  position: absolute;
  width: min(54vw, 620px);
  height: min(54vw, 620px);
  border-radius: 50%;
  transform: translateZ(0);
  filter: blur(8px);
  z-index: 1;
  transition:
    box-shadow 180ms ease,
    border-color 180ms ease,
    opacity 180ms ease;
}

.avatar-ring::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 2px solid rgba(255, 255, 255, 0.22);
}

.state-idle {
  box-shadow: 0 0 32px 4px var(--ring-idle);
  opacity: 0.68;
}

.state-listening {
  box-shadow: 0 0 56px 10px var(--ring-listening);
  opacity: 1;
}

.state-thinking {
  box-shadow: 0 0 52px 12px var(--ring-thinking);
  animation: thinkingPulse 1.4s infinite ease-in-out;
  opacity: 1;
}

.state-speaking {
  box-shadow: 0 0 62px 14px var(--ring-speaking);
  animation: speakingPulse 0.9s infinite ease-in-out;
  opacity: 1;
}

.state-error {
  box-shadow: 0 0 54px 12px var(--ring-error);
  opacity: 1;
}

.startup-overlay[hidden],
.startup-overlay.is-hidden {
  display: none !important;
}

.startup-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  padding: 24px;
  background: rgba(4, 11, 20, 0.56);
  backdrop-filter: blur(14px);
}

.startup-modal {
  width: min(92vw, 460px);
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 28px;
  background: rgba(8, 18, 31, 0.9);
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.35);
}

.startup-kicker {
  margin-bottom: 8px;
  color: rgba(151, 255, 199, 0.88);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.startup-title {
  margin: 0;
  color: #f3f7ff;
  font-size: 30px;
  line-height: 1.12;
}

.startup-copy {
  margin: 14px 0 20px;
  color: rgba(220, 230, 248, 0.74);
  font-size: 14px;
  line-height: 1.55;
}

.startup-label {
  display: block;
  margin-bottom: 10px;
  color: rgba(226, 236, 250, 0.88);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.startup-input {
  width: 100%;
  height: 54px;
  padding: 0 16px;
  border: 1px solid rgba(162, 198, 255, 0.18);
  border-radius: 16px;
  background: rgba(14, 27, 43, 0.94);
  color: #f3f7ff;
  font: inherit;
  outline: none;
}

.startup-input:focus {
  border-color: rgba(121, 217, 255, 0.7);
  box-shadow: 0 0 0 4px rgba(121, 217, 255, 0.12);
}

.startup-error {
  margin-top: 12px;
  color: #ffb3b3;
  font-size: 13px;
  line-height: 1.5;
}

.startup-button {
  width: 100%;
  height: 52px;
  margin-top: 18px;
  border: 0;
  border-radius: 16px;
  background: linear-gradient(135deg, #6ad1ff 0%, #87ffcf 100%);
  color: #07121f;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.startup-button:disabled {
  cursor: wait;
  opacity: 0.72;
}

.brand-watermark {
  position: absolute;
  left: 50%;
  bottom: 4.5vh;
  transform: translateX(-50%);
  z-index: 3;
  padding: 8px 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(7, 18, 31, 0.32);
  color: rgba(236, 244, 255, 0.76);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.16);
  pointer-events: none;
}

.developer-indicator {
  position: absolute;
  left: 24px;
  bottom: 24px;
  padding: 8px 12px;
  border-radius: 999px;
  color: #e7eefc;
  background: var(--panel);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

canvas {
  display: block;
}

@keyframes thinkingPulse {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }
}

@keyframes speakingPulse {
  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.08);
  }
}

@media (max-width: 1200px) {
  .session-close {
    top: 16px;
    right: 16px;
    height: 40px;
    padding: 0 14px;
    font-size: 12px;
  }

  .avatar-container {
    width: min(96vw, 760px);
    height: min(92vh, 960px);
  }

  .avatar-ring {
    width: min(72vw, 540px);
    height: min(72vw, 540px);
  }

  .startup-modal {
    padding: 22px;
    border-radius: 22px;
  }

  .startup-title {
    font-size: 25px;
  }

  .brand-watermark {
    bottom: 3.2vh;
    font-size: 11px;
    letter-spacing: 0.14em;
    padding: 7px 12px;
  }
}