:root {
  --cb-surface: #121212;
  --cb-border: rgba(255, 255, 255, 0.18);
  --cb-border-hi: rgba(255, 255, 255, 0.34);
  --cb-text: #fff;
  --cb-muted: rgba(255, 255, 255, 0.64);
  --cb-accent: #d90429;
  --cb-shadow: 0 12px 30px rgba(0, 0, 0, 0.38);
}

.flint-chat-launcher {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 980;
  border: 1px solid var(--cb-border-hi);
  background: #fff;
  color: #000;
  padding: 0.62rem 0.9rem;
  font: 700 0.68rem/1 "Ubuntu", "Helvetica Neue", Helvetica, Arial, sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: var(--cb-shadow);
}

.flint-chat-launcher:hover,
.flint-chat-launcher:focus-visible {
  background: var(--cb-accent);
  border-color: var(--cb-accent);
  outline: none;
}

.flint-chat-panel {
  position: fixed;
  right: 1rem;
  bottom: 4rem;
  z-index: 981;
  width: min(420px, calc(100vw - 2rem));
  height: min(620px, calc(100vh - 6rem));
  border: 1px solid var(--cb-border-hi);
  background: var(--cb-surface);
  color: var(--cb-text);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  box-shadow: var(--cb-shadow);
}

.flint-chat-panel[hidden] {
  display: none;
}

.flint-chat-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.68rem 0.72rem;
  border-bottom: 1px solid var(--cb-border);
}

.flint-chat-title {
  margin: 0;
  font: 700 0.67rem/1 "Ubuntu", "Helvetica Neue", Helvetica, Arial, sans-serif;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.flint-chat-close {
  border: 1px solid var(--cb-border);
  background: transparent;
  color: var(--cb-text);
  width: 30px;
  height: 30px;
  cursor: pointer;
}

.flint-chat-close:hover,
.flint-chat-close:focus-visible {
  border-color: var(--cb-border-hi);
  outline: none;
}

.flint-chat-messages {
  margin: 0;
  padding: 0.72rem;
  list-style: none;
  display: grid;
  gap: 0.45rem;
  overflow: auto;
  align-content: start;
  background: #0a0a0a;
}

.flint-chat-bubble {
  border: 1px solid var(--cb-border);
  padding: 0.58rem 0.68rem;
  font: 400 0.85rem/1.44 "Ubuntu", "Helvetica Neue", Helvetica, Arial, sans-serif;
  white-space: pre-wrap;
}

.flint-chat-bubble.user {
  margin-left: 8%;
  border-color: var(--cb-border-hi);
  background: #171717;
}

.flint-chat-bubble.assistant {
  margin-right: 8%;
  background: #101010;
}

.flint-chat-status {
  margin: 0;
  padding: 0.45rem 0.72rem 0;
  color: var(--cb-muted);
  font: 400 0.73rem/1.3 "Ubuntu", "Helvetica Neue", Helvetica, Arial, sans-serif;
  min-height: 1.2em;
}

.flint-chat-status.error {
  color: #ff7a7a;
}

.flint-chat-form {
  border-top: 1px solid var(--cb-border);
  padding: 0.62rem;
  display: grid;
  gap: 0.45rem;
  background: #111;
}

.flint-chat-form label {
  font: 700 0.61rem/1 "Ubuntu", "Helvetica Neue", Helvetica, Arial, sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cb-muted);
}

.flint-chat-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.48rem;
}

.flint-chat-input {
  width: 100%;
  border: 1px solid var(--cb-border);
  background: #fff;
  color: #000;
  padding: 0.58rem 0.62rem;
  font: 400 0.86rem/1.3 "Ubuntu", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.flint-chat-input:focus-visible {
  outline: none;
  border-color: var(--cb-border-hi);
}

.flint-chat-send {
  border: 1px solid var(--cb-border-hi);
  background: #fff;
  color: #000;
  font: 700 0.66rem/1 "Ubuntu", "Helvetica Neue", Helvetica, Arial, sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0 0.95rem;
  cursor: pointer;
}

.flint-chat-send:hover,
.flint-chat-send:focus-visible {
  background: var(--cb-accent);
  border-color: var(--cb-accent);
  outline: none;
}

.flint-chat-send:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

@media (max-width: 640px) {
  .flint-chat-launcher {
    right: 0.65rem;
    bottom: 0.65rem;
  }

  .flint-chat-panel {
    left: 0.65rem;
    right: 0.65rem;
    width: auto;
    bottom: 3.3rem;
    height: min(74vh, 560px);
  }

  .flint-chat-bubble.user,
  .flint-chat-bubble.assistant {
    margin-left: 0;
    margin-right: 0;
  }
}