:root {
  color-scheme: dark;
  --zgv-bg: #050505;
  --zgv-panel: #1f2022;
  --zgv-panel-soft: #282a2d;
  --zgv-text: #e8eaed;
  --zgv-muted: #b5bac3;
  --zgv-subtle: #8e949e;
  --zgv-blue: #0b57d0;
  --zgv-link: #8ab4f8;
  --zgv-border: rgba(255, 255, 255, 0.1);
  --zgv-column: 920px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--zgv-bg);
  color: var(--zgv-text);
  font-family: Helvetica, Arial, sans-serif;
}

body {
  overflow: hidden;
}

.zgv-shell {
  position: relative;
  min-height: 100vh;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 18%, rgba(40, 91, 210, 0.16), transparent 22rem),
    radial-gradient(circle at 72% 12%, rgba(6, 95, 70, 0.14), transparent 22rem),
    var(--zgv-bg);
}

.zgv-topbar {
  flex: 0 0 auto;
  height: 72px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 18px;
  padding: 0 24px;
  z-index: 4;
}

.zgv-brand {
  color: #d7d9de;
  font-size: 24px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.zgv-upgrade {
  border: 0;
  border-radius: 999px;
  padding: 14px 24px;
  background: #075985;
  color: #dbeafe;
  font: inherit;
  font-weight: 700;
  cursor: default;
}

.zgv-menu {
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #d7d9de;
  font-size: 24px;
}

.zgv-hero {
  width: min(var(--zgv-column), calc(100vw - 48px));
  margin: clamp(110px, 22vh, 230px) auto 26px;
  transition: opacity 0.2s ease, transform 0.2s ease, height 0.2s ease, margin 0.2s ease;
}

.zgv-has-chat .zgv-hero {
  height: 0;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(-12px);
  pointer-events: none;
  overflow: hidden;
}

.zgv-hero p {
  margin: 0 0 12px;
  color: #d6d8dd;
  font-size: clamp(22px, 2.4vw, 34px);
  letter-spacing: 0.03em;
}

.zgv-hero h1 {
  margin: 0;
  color: #e8eaed;
  font-size: clamp(38px, 4vw, 62px);
  font-weight: 500;
  letter-spacing: -0.04em;
}

.zgv-thread {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding: 24px max(24px, calc((100vw - var(--zgv-column)) / 2)) 210px;
  scroll-behavior: smooth;
}

.zgv-thread:empty {
  display: none;
}

.zgv-turn {
  max-width: var(--zgv-column);
  margin: 0 auto 32px;
}

.zgv-user {
  display: flex;
  justify-content: flex-end;
  margin: 0 0 28px;
}

.zgv-user-bubble {
  max-width: min(62%, 560px);
  padding: 14px 18px;
  border-radius: 22px 22px 4px 22px;
  background: #0b57d0;
  color: #fff;
  font-size: 17px;
  line-height: 1.38;
}

.zgv-answer {
  color: #d7d9de;
  font-size: 17px;
  line-height: 1.68;
}

.zgv-answer h1,
.zgv-answer h2,
.zgv-answer h3 {
  color: #f1f3f4;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.zgv-answer h2 {
  font-size: 22px;
  margin: 24px 0 10px;
}

.zgv-answer h3 {
  font-size: 18px;
  margin: 18px 0 8px;
}

.zgv-answer a {
  color: var(--zgv-link);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.zgv-answer p {
  margin: 0 0 18px;
}

.zgv-answer ul,
.zgv-answer ol {
  padding-left: 28px;
  margin: 12px 0 20px;
}

.zgv-answer li {
  margin: 8px 0;
}

.zgv-loading {
  display: inline-flex;
  gap: 5px;
  padding: 16px 0;
}

.zgv-loading span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #8ab4f8;
  animation: zgv-pulse 1s infinite ease-in-out;
}

.zgv-loading span:nth-child(2) {
  animation-delay: 0.12s;
}

.zgv-loading span:nth-child(3) {
  animation-delay: 0.24s;
}

@keyframes zgv-pulse {
  0%, 80%, 100% { opacity: 0.35; transform: translateY(0); }
  40% { opacity: 1; transform: translateY(-4px); }
}

.zgv-show-more {
  display: inline-block;
  margin: 4px 0 12px;
  border: 0;
  background: transparent;
  color: #8ab4f8;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  padding: 0;
}

.zgv-afs {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--zgv-border);
}

.zgv-afs-title {
  margin: 0 0 14px;
  color: #aeb4bf;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.zgv-afs iframe {
  max-width: 100%;
}

.zgv-composer {
  position: static;
  z-index: 5;
  padding: 22px 24px 34px;
  background: transparent;
}

.zgv-has-chat .zgv-composer {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 18px 24px 34px;
  background: linear-gradient(180deg, rgba(5, 5, 5, 0), #050505 32%, #050505);
}

.zgv-composer-inner {
  width: min(var(--zgv-column), calc(100vw - 48px));
  min-height: 118px;
  margin: 0 auto;
  border-radius: 999px;
  background: var(--zgv-panel);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 0 36px 0 42px;
}

.zgv-composer input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: #f1f3f4;
  font: inherit;
  font-size: 32px;
}

.zgv-composer input::placeholder {
  color: #bdc1c6;
}

.zgv-composer-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #c7cacf;
}

.zgv-send {
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  font-size: 34px;
  cursor: pointer;
}

.zgv-send {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
}

.zgv-has-chat .zgv-composer-inner {
  min-height: 74px;
  grid-template-columns: 1fr auto;
  align-items: center;
  border-radius: 999px;
  padding: 12px 16px 12px 24px;
}

.zgv-has-chat .zgv-composer input {
  font-size: 18px;
}

.zgv-has-chat .zgv-send {
  width: 42px;
  height: 42px;
  font-size: 24px;
}

@media (max-width: 720px) {
  :root {
    --zgv-column: 100%;
  }

  .zgv-topbar {
    height: 64px;
    grid-template-columns: 1fr auto;
    padding: 0 16px;
  }

  .zgv-brand {
    font-size: 22px;
  }

  .zgv-upgrade {
    display: none;
  }

  .zgv-hero {
    width: calc(100vw - 40px);
    margin: 20vh auto 22px;
  }

  .zgv-hero p {
    font-size: 22px;
  }

  .zgv-hero h1 {
    font-size: 38px;
  }

  .zgv-thread {
    padding: 16px 18px 150px;
  }

  .zgv-user-bubble {
    max-width: 82%;
    font-size: 15px;
  }

  .zgv-answer {
    font-size: 16px;
  }

  .zgv-composer {
    padding: 14px 14px 18px;
  }

  .zgv-composer-inner {
    width: 100%;
    min-height: 72px;
    border-radius: 999px;
    padding: 0 18px 0 24px;
  }

  .zgv-composer input {
    font-size: 20px;
  }

  .zgv-send {
    width: 40px;
    height: 40px;
    font-size: 24px;
  }

  .zgv-has-chat .zgv-composer-inner {
    min-height: 62px;
  }
}