:root {
  --qv-bg: #f4f6f8;
  --qv-bg-soft: #eef1f4;
  --qv-card: #ffffff;
  --qv-text: #13202b;
  --qv-muted: #5b6a78;
  --qv-border: rgba(19, 32, 43, 0.12);
  --qv-accent: #2863c6;
  --qv-accent-hover: #1e54ad;
  --qv-user-bubble: #1e2d3f;
  --qv-bot-bubble: #f5f7fa;
  --qv-shadow: 0 14px 40px rgba(18, 35, 52, 0.08);
}

* {
  box-sizing: border-box;
}

body,
html {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: "Manrope", "Segoe UI", sans-serif;
  color: var(--qv-text);
}

.qv-bg {
  background:
    radial-gradient(1200px 500px at 0% -10%, #dfe8f7 0%, transparent 50%),
    radial-gradient(1000px 380px at 100% 0%, #e7edf5 0%, transparent 45%),
    var(--qv-bg);
}

.qv-brand {
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.qv-meta,
.qv-muted,
.qv-muted-small {
  color: var(--qv-muted);
}

.qv-muted-small {
  font-size: 0.84rem;
}

.qv-auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.qv-auth-card {
  width: min(460px, 100%);
  background: var(--qv-card);
  border: 1px solid var(--qv-border);
  border-radius: 20px;
  box-shadow: var(--qv-shadow);
  padding: 28px;
}

.qv-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--qv-border);
  background: rgba(244, 246, 248, 0.8);
  backdrop-filter: blur(8px);
  padding: 12px 0;
}

.qv-pill {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--qv-border);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.8rem;
  background: #fff;
}

.qv-chat-layout {
  padding-top: 16px;
  padding-bottom: 20px;
}

.qv-chat-card,
.qv-sources-card,
.qv-panel {
  border: 1px solid var(--qv-border);
  border-radius: 18px;
  background: var(--qv-card);
  box-shadow: var(--qv-shadow);
}

.qv-chat-card {
  overflow: hidden;
}

.qv-chat-log {
  height: min(66vh, 680px);
  overflow-y: auto;
  padding: 14px;
  background: linear-gradient(180deg, rgba(244, 247, 251, 0.45) 0%, rgba(255, 255, 255, 0.8) 100%);
}

.qv-msg {
  max-width: 84%;
  margin-bottom: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  line-height: 1.4;
  white-space: pre-wrap;
  word-break: break-word;
}

.qv-msg-user {
  margin-left: auto;
  background: var(--qv-user-bubble);
  color: #fff;
}

.qv-msg-bot {
  margin-right: auto;
  background: var(--qv-bot-bubble);
  border: 1px solid var(--qv-border);
}

.qv-composer {
  padding: 12px;
  border-top: 1px solid var(--qv-border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
}

.qv-chat-footer {
  border-top: 1px solid var(--qv-border);
  background: var(--qv-bg-soft);
  padding: 8px 12px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.qv-input {
  border: 1px solid var(--qv-border);
  border-radius: 12px;
  padding: 11px 12px;
  box-shadow: none;
}

.qv-input:focus {
  border-color: rgba(40, 99, 198, 0.45);
  box-shadow: 0 0 0 0.2rem rgba(40, 99, 198, 0.16);
}

textarea.qv-input {
  resize: none;
  max-height: 200px;
}

.qv-btn-primary {
  background: var(--qv-accent);
  border: 1px solid var(--qv-accent);
  color: #fff;
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 600;
}

.qv-btn-primary:hover,
.qv-btn-primary:focus {
  background: var(--qv-accent-hover);
  border-color: var(--qv-accent-hover);
  color: #fff;
}

.qv-sources-card,
.qv-panel {
  margin-top: 14px;
  padding: 14px;
}

.qv-sources-list {
  display: grid;
  gap: 8px;
}

.qv-source-item {
  border: 1px solid var(--qv-border);
  border-radius: 12px;
  padding: 8px 10px;
  background: #fafcfe;
}

.qv-h2 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.qv-mono {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

@media (max-width: 768px) {
  .qv-chat-log {
    height: min(62vh, 560px);
  }

  .qv-composer {
    grid-template-columns: 1fr;
  }

  .qv-composer .qv-btn-primary {
    width: 100%;
  }

  .qv-chat-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}