.bpc-ai-shortcode,
.bpc-ai-shortcode * { box-sizing: border-box; }

.bpc-ai-shortcode {
  --bpc-ai-bg: #17325d;
  --bpc-ai-surface: #ffffff;
  --bpc-ai-text: #10243d;
  --bpc-ai-muted: #5b6677;
  --bpc-ai-line: #dce5f1;
  --bpc-ai-user: #d9efff;
  --bpc-ai-bot: #f2f4f8;
  --bpc-ai-accent: #8dd7d2;
  --bpc-ai-primary: #2aa8dc;
  --bpc-ai-card-bg-start: #17325d;
  --bpc-ai-card-bg-end: #10254d;
  --bpc-ai-title-color: #ffffff;
  --bpc-ai-subtitle-color: #1cf0cf;
  --bpc-ai-font-family: inherit;
  --bpc-ai-heading-font-family: var(--bpc-ai-font-family);
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  color: var(--bpc-ai-text);
  font-family: var(--bpc-ai-font-family);
}

.bpc-ai-card {
  width: 100%;
  background: linear-gradient(180deg, var(--bpc-ai-card-bg-start) 0%, var(--bpc-ai-card-bg-end) 100%);
  border-radius: 24px;
  padding: 22px;
  box-shadow: 0 30px 60px rgba(15, 23, 42, 0.16);
}

.bpc-ai-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.bpc-ai-branding {
  display: flex;
  align-items: center;
  gap: 14px;
}

.bpc-ai-brand-avatar,
.bpc-ai-avatar {
  width: 48px;
  height: 48px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,0.14);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 48px;
}

.bpc-ai-brand-avatar img,
.bpc-ai-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.bpc-ai-title {
  color: var(--bpc-ai-title-color);
  font-size: 2rem;
  line-height: 1.05;
  font-weight: 800;
  font-family: var(--bpc-ai-heading-font-family);
}

.bpc-ai-subtitle {
  color: var(--bpc-ai-subtitle-color);
  font-size: 0.98rem;
  font-weight: 700;
  margin-top: 4px;
  font-family: var(--bpc-ai-heading-font-family);
}

.bpc-ai-messages {
  height: var(--bpc-ai-height, 420px);
  background: var(--bpc-ai-surface);
  border: 1px solid var(--bpc-ai-line);
  border-radius: 22px 22px 0 0;
  padding: 20px;
  overflow-y: auto;
}

.bpc-ai-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.bpc-ai-row.is-user {
  flex-direction: row-reverse;
}

.bpc-ai-row.is-user .bpc-ai-avatar {
  background: rgba(42, 168, 220, 0.18);
}

.bpc-ai-bubble {
  max-width: min(86%, 760px);
  padding: 16px 18px;
  border-radius: 18px;
  font-size: 1rem;
  line-height: 1.6;
  background: var(--bpc-ai-bot);
  color: var(--bpc-ai-text);
  word-break: break-word;
}

.bpc-ai-row.is-user .bpc-ai-bubble {
  background: var(--bpc-ai-user);
}

.bpc-ai-row.is-busy .bpc-ai-bubble {
  color: var(--bpc-ai-muted);
}

.bpc-ai-starters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 0 0;
}

.bpc-ai-starter {
  border: 1px solid rgba(255,255,255,0.22);
  background: rgba(255,255,255,0.08);
  color: #ffffff;
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
  font: inherit;
}

.bpc-ai-error {
  color: #ffd2d2;
  font-size: 0.95rem;
  min-height: 1.3em;
  padding: 10px 8px 0;
}

.bpc-ai-composer {
  display: flex;
  gap: 12px;
  align-items: center;
  background: var(--bpc-ai-surface);
  border: 1px solid var(--bpc-ai-line);
  border-top: 0;
  padding: 18px;
  border-radius: 0 0 22px 22px;
}

.bpc-ai-input {
  min-width: 0;
  width: 100%;
  border: 2px solid #c6d3e3;
  border-radius: 18px;
  min-height: 56px;
  padding: 0 18px;
  font: inherit;
  font-size: 16px;
  color: var(--bpc-ai-text);
  outline: none;
}

.bpc-ai-input:focus {
  border-color: var(--bpc-ai-primary);
  box-shadow: 0 0 0 4px rgba(42, 168, 220, 0.12);
}

.bpc-ai-send {
  flex: 0 0 56px;
  width: 56px;
  height: 56px;
  border: 0;
  border-radius: 16px;
  background: var(--bpc-ai-accent);
  color: #ffffff;
  cursor: pointer;
  font-size: 1.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.bpc-ai-send:disabled {
  opacity: 0.7;
  cursor: default;
}

.bpc-ai-footnote {
  color: rgba(255,255,255,0.78);
  font-size: 0.82rem;
  text-align: center;
  padding-top: 12px;
}

.bpc-ai-footnote a {
  color: #ffffff;
}

@media (max-width: 767px) {
  .bpc-ai-card { padding: 16px; border-radius: 18px; }
  .bpc-ai-title { font-size: 1.5rem; }
  .bpc-ai-subtitle { font-size: 0.9rem; }
  .bpc-ai-messages { height: min(58vh, var(--bpc-ai-height, 420px)); padding: 16px; }
  .bpc-ai-composer { padding: 14px; }
  .bpc-ai-bubble { max-width: 100%; font-size: 0.96rem; }
}