:root {
  --bg: #0b0e14;
  --panel: #12161f;
  --panel-2: #1a1f2b;
  --border: #263041;
  --text: #e6e9ef;
  --muted: #8b95a7;
  --accent: #f6821f; /* Cloudflare orange */
  --accent-2: #ffb454;
  --user: #1f6feb;
  --radius: 14px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, #1a1205 0%, transparent 55%),
    radial-gradient(1000px 500px at 0% 0%, #0d1524 0%, transparent 50%), var(--bg);
  color: var(--text);
}

.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 900px;
  margin: 0 auto;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo {
  font-size: 30px;
  filter: drop-shadow(0 0 12px rgba(246, 130, 31, 0.4));
}

.topbar h1 {
  font-size: 18px;
  margin: 0;
  letter-spacing: -0.01em;
}

.subtitle {
  margin: 2px 0 0;
  font-size: 12.5px;
  color: var(--muted);
}

.config {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.pill {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent-2);
  background: rgba(246, 130, 31, 0.08);
  border: 1px solid rgba(246, 130, 31, 0.25);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

/* Chat area */
.chat {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.empty {
  margin: auto;
  text-align: center;
  max-width: 520px;
  color: var(--muted);
}

.empty-icon {
  font-size: 44px;
  margin-bottom: 8px;
}

.empty h2 {
  color: var(--text);
  margin: 0 0 8px;
  font-size: 22px;
}

.empty p {
  font-size: 14px;
  line-height: 1.6;
}

.samples {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 18px;
}

.sample {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}

.sample:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* Messages */
.msg {
  display: flex;
  flex-direction: column;
  gap: 6px;
  animation: rise 0.25s ease;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.msg .role {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.bubble {
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 14.5px;
  line-height: 1.65;
  white-space: pre-wrap;
  word-wrap: break-word;
}

.msg.user {
  align-items: flex-end;
}

.msg.user .bubble {
  background: linear-gradient(135deg, #1f6feb, #2f81f7);
  color: #fff;
  border-bottom-right-radius: 4px;
  max-width: 80%;
}

.msg.assistant .bubble {
  background: var(--panel);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}

.bubble code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: rgba(255, 255, 255, 0.07);
  padding: 1px 5px;
  border-radius: 5px;
}

.cursor {
  display: inline-block;
  width: 8px;
  height: 1.05em;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink 1s steps(2) infinite;
  border-radius: 1px;
  margin-left: 1px;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* Sources */
.sources {
  margin-top: 4px;
}

.sources summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 12.5px;
  user-select: none;
  padding: 4px 0;
}

.sources summary:hover {
  color: var(--accent-2);
}

.source {
  border: 1px solid var(--border);
  background: var(--panel-2);
  border-radius: 10px;
  padding: 10px 12px;
  margin-top: 8px;
}

.source-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.source-file {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.score {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  flex-shrink: 0;
}

.source-content {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.55;
  max-height: 120px;
  overflow: auto;
  white-space: pre-wrap;
}

.error-bubble {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.4);
  color: #ffb3ae;
}

/* Composer */
.composer {
  border-top: 1px solid var(--border);
  padding: 14px 20px 18px;
  background: rgba(11, 14, 20, 0.6);
  backdrop-filter: blur(8px);
}

.composer-inner {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--muted);
  cursor: pointer;
}

.composer-inner {
  position: relative;
}

.composer-inner > .toggle {
  display: inline-flex;
}

#form {
  display: flex;
  gap: 10px;
}

#input {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 13px 16px;
  border-radius: 12px;
  font-size: 14.5px;
  outline: none;
  transition: border-color 0.15s;
}

#input:focus {
  border-color: var(--accent);
}

#send {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1205;
  border: none;
  padding: 0 22px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}

#send:hover {
  transform: translateY(-1px);
}

#send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.hint {
  margin: 10px 2px 0;
  font-size: 11.5px;
  color: var(--muted);
  text-align: center;
}

.hint code {
  font-family: var(--mono);
  color: var(--accent-2);
}

/* Toggles row */
.composer-inner {
  display: grid;
  grid-template-columns: auto auto 1fr;
  grid-template-areas:
    "t1 t2 ."
    "form form form";
  gap: 10px 16px;
  align-items: center;
}

.toggle:nth-of-type(1) {
  grid-area: t1;
}
.toggle:nth-of-type(2) {
  grid-area: t2;
}
#form {
  grid-area: form;
}

@media (max-width: 560px) {
  .config {
    display: none;
  }
}