:root {
  color-scheme: dark;
  --bg: #0f172a;
  --panel: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --user: #1d4ed8;
  --agent: #14532d;
  --danger: #f87171;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  height: 100%;
}

body {
  margin: 0;
  height: 100dvh;
  height: var(--vvh, 100dvh);
  max-height: var(--vvh, 100dvh);
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

.header {
  display: flex;
  flex-shrink: 0;
  justify-content: space-between;
  align-items: flex-start;
  padding: max(0.75rem, env(safe-area-inset-top)) 1rem 0.5rem;
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
  border-bottom: 1px solid #334155;
  background: var(--bg);
}

.header-actions {
  display: flex;
  gap: 0.35rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

h1 {
  margin: 0.15rem 0 0;
  font-size: 1.25rem;
  font-weight: 600;
}

.icon-btn {
  border: 1px solid #475569;
  background: var(--panel);
  color: var(--text);
  border-radius: 0.5rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: 0 0.55rem;
  font-size: 0.9rem;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.status-bar {
  flex-shrink: 0;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  color: var(--muted);
  background: #111827;
}

.status-bar.ok {
  color: #86efac;
}

.status-bar.warn {
  color: #fde047;
}

.status-bar.error {
  color: var(--danger);
}

.chat {
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 1rem;
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
  touch-action: pan-y;
}

.bubble {
  max-width: 92%;
  padding: 0.75rem 0.9rem;
  border-radius: 1rem;
  line-height: 1.45;
  word-break: break-word;
}

.bubble:not(.markdown) {
  white-space: pre-wrap;
}

.bubble.markdown {
  white-space: normal;
}

.bubble.markdown :first-child {
  margin-top: 0;
}

.bubble.markdown :last-child {
  margin-bottom: 0;
}

.bubble.markdown p {
  margin: 0.5rem 0;
}

.bubble.markdown ul,
.bubble.markdown ol {
  margin: 0.5rem 0;
  padding-left: 1.25rem;
}

.bubble.markdown h1,
.bubble.markdown h2,
.bubble.markdown h3 {
  margin: 0.75rem 0 0.35rem;
  font-size: 1rem;
}

.bubble.markdown code {
  background: rgba(0, 0, 0, 0.25);
  padding: 0.1rem 0.35rem;
  border-radius: 0.25rem;
  font-size: 0.9em;
}

.bubble.markdown pre {
  overflow-x: auto;
  background: rgba(0, 0, 0, 0.3);
  padding: 0.5rem 0.65rem;
  border-radius: 0.5rem;
}

.bubble.markdown pre code {
  background: none;
  padding: 0;
}

.bubble.markdown table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.65rem 0;
  font-size: 0.85rem;
  display: block;
  overflow-x: auto;
}

.bubble.markdown th,
.bubble.markdown td {
  border: 1px solid rgba(226, 232, 240, 0.25);
  padding: 0.35rem 0.5rem;
  text-align: left;
  vertical-align: top;
}

.bubble.markdown th {
  background: rgba(0, 0, 0, 0.25);
  font-weight: 600;
}

.bubble.markdown tr:nth-child(even) td {
  background: rgba(0, 0, 0, 0.12);
}

.bubble.user {
  align-self: flex-end;
  background: var(--user);
}

.bubble.agent {
  align-self: flex-start;
  background: var(--agent);
}

.bubble.agent.marcus,
.bubble.marcus {
  border-left: 3px solid #fbbf24;
}

.bubble.marcus .marcus-approval {
  margin-top: 0.75rem;
  padding: 0.5rem 0.65rem;
  border-radius: 0.35rem;
  background: rgba(251, 191, 36, 0.15);
  color: #fde68a;
  font-size: 0.9rem;
}

.bubble.agent.skeleton {
  background: #1e3a2f;
  min-width: 12rem;
}

.bubble.agent.skeleton.marcus {
  background: #3b2f1a;
}

.skeleton-line {
  height: 0.65rem;
  border-radius: 0.25rem;
  background: linear-gradient(90deg, #14532d 0%, #166534 50%, #14532d 100%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.2s ease-in-out infinite;
  margin-bottom: 0.45rem;
}

.skeleton-line.short {
  width: 55%;
}

.skeleton-status {
  margin: 0.5rem 0 0;
  font-size: 0.8rem;
  color: #86efac;
}

@keyframes skeleton-shimmer {
  0% {
    background-position: 100% 0;
  }
  100% {
    background-position: -100% 0;
  }
}

.rewritten-hint {
  margin: 0 0 0.65rem;
  font-size: 0.8rem;
  color: #bbf7d0;
  opacity: 0.9;
}

.follow-up-offer {
  margin-top: 0.65rem;
  color: #d9f99d;
}

.bubble.agent .tool-activity {
  margin-top: 0.75rem;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(226, 232, 240, 0.2);
  font-size: 0.8rem;
  color: #bbf7d0;
}

.bubble.agent .tool-activity.warn {
  color: #fde68a;
}

.bubble.agent .tool-activity ul {
  margin: 0.35rem 0 0;
  padding-left: 1.1rem;
}

.bubble.agent .tool-activity li {
  margin: 0.15rem 0;
}

.bubble.agent .tool-activity code {
  font-size: 0.85em;
}

.composer {
  flex-shrink: 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  padding: 0.75rem;
  padding-bottom: max(0.75rem, env(safe-area-inset-bottom));
  padding-left: max(0.75rem, env(safe-area-inset-left));
  padding-right: max(0.75rem, env(safe-area-inset-right));
  border-top: 1px solid #334155;
  background: #111827;
}

.composer textarea {
  resize: none;
  border-radius: 0.75rem;
  border: 1px solid #475569;
  background: var(--panel);
  color: var(--text);
  padding: 0.65rem 0.75rem;
  font: inherit;
  font-size: 16px;
  line-height: 1.35;
  max-height: 40vh;
}

.composer button {
  border: none;
  border-radius: 0.75rem;
  background: var(--accent);
  color: #0f172a;
  font-weight: 600;
  min-width: 3.25rem;
  min-height: 2.75rem;
  padding: 0 1rem;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.composer button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.settings-dialog {
  border: 1px solid #475569;
  border-radius: 0.75rem;
  padding: 0;
  background: var(--panel);
  color: var(--text);
  width: min(24rem, 92vw);
}

.settings-dialog form {
  padding: 1rem;
  display: grid;
  gap: 0.75rem;
}

.settings-dialog label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
}

.settings-dialog input {
  border-radius: 0.5rem;
  border: 1px solid #475569;
  background: #0f172a;
  color: var(--text);
  padding: 0.5rem 0.65rem;
  font: inherit;
}

.hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
}

.dialog-actions button {
  border-radius: 0.5rem;
  border: 1px solid #475569;
  background: #0f172a;
  color: var(--text);
  padding: 0.45rem 0.75rem;
  cursor: pointer;
}

.dialog-actions button[type="submit"] {
  background: var(--accent);
  color: #0f172a;
  border-color: transparent;
  font-weight: 600;
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 1.1rem;
  }

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

  .composer button {
    width: 100%;
    min-height: 3rem;
  }

  .bubble {
    max-width: 100%;
  }

  .settings-dialog {
    width: min(24rem, 100vw);
    max-height: 90dvh;
    margin: auto;
  }
}

.charts-mount {
  display: grid;
  gap: 1rem;
  margin: 0.75rem 0 1rem;
}

.chart-wrap {
  margin: 0;
  padding: 0.75rem;
  border-radius: 0.65rem;
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid #334155;
}

.chart-title {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.chart-fallback {
  margin: 0.5rem 0 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.answer-summary + .charts-mount,
.charts-mount + .answer-tail {
  margin-top: 0.5rem;
}