:root {
  color-scheme: light;
  --surface: #ffffff;
  --surface-raised: #ffffff;
  --surface-muted: #f4f4f5;
  --border: #e4e4e7;
  --text: #0a0a0a;
  --text-muted: #71717a;
  --accent: #6366f1;
  --accent-fg: #ffffff;
  --success: #16a34a;
  --warn: #d97706;
  --user-bubble-bg: #0a0a0a;
  --user-bubble-fg: #ffffff;

  font-family:
    ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  color: var(--text);
  background: var(--surface-muted);
}

* {
  box-sizing: border-box;
}

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

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

a {
  color: var(--accent);
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.9em;
  background: var(--surface-muted);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

/* Dividers between repeated list items — top border on all but the first
   so there's no dangling line at either end. */
.jr-list-item + .jr-list-item {
  border-top: 1px solid var(--border);
}

@keyframes jr-shimmer {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}

.jr-shimmer {
  animation: jr-shimmer 1.4s ease-in-out infinite;
}

kbd {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  font-family:
    ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 11px;
  line-height: 1.3;
}

/* ==========================================================================
   App shell
   ========================================================================== */

.app {
  height: 100%;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--surface-muted);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-dot {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), color-mix(in oklab, var(--accent) 60%, #000));
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--accent) 20%, transparent);
}

.topbar-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.topbar-title {
  font-weight: 600;
  font-size: 14px;
}

.topbar-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.topbar-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.btn-ghost {
  background: transparent;
  border: 1px solid transparent;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
}
.btn-ghost:hover {
  background: var(--surface-muted);
  color: var(--text);
}

.btn-link {
  text-decoration: none;
  font-size: 13px;
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 8px;
}
.btn-link:hover {
  background: var(--surface-muted);
  color: var(--text);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-fg);
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==========================================================================
   Scrollable chat area
   ========================================================================== */

.scroll {
  overflow-y: auto;
  padding: 24px 20px 40px;
}

.thread {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.row {
  display: flex;
  width: 100%;
}

.row.user {
  justify-content: flex-end;
}

.row.assistant {
  justify-content: flex-start;
}

.bubble.user {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 16px 16px 4px 16px;
  background: var(--user-bubble-bg);
  color: var(--user-bubble-fg);
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.assistant-inner {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.assistant-text {
  font-size: 13px;
  line-height: 1.55;
  white-space: pre-wrap;
  color: var(--text);
}

.thinking {
  font-size: 13px;
  color: var(--text-muted);
}

/* Each rendered spec is wrapped in a structural container without any
   visual chrome of its own — the AI-generated Card (or whatever the
   root element is) carries the framing. `.thread` already provides the
   gap between messages, so no outer border is needed here. */
.spec-wrap {
  width: 100%;
}

.error {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid color-mix(in oklab, var(--warn) 40%, var(--border));
  background: color-mix(in oklab, var(--warn) 10%, transparent);
  color: var(--warn);
  font-size: 13px;
}

/* ==========================================================================
   Empty state
   ========================================================================== */

.empty {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 0;
}

.empty-inner {
  max-width: 720px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.eyebrow {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

.empty h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.lead {
  margin: 0;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.55;
}

.callout-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 620px) {
  .callout-row {
    grid-template-columns: 1fr;
  }
}

.callout {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 13px;
  line-height: 1.5;
}
.callout .cap {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.sugg-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 8px;
}
@media (max-width: 620px) {
  .sugg-grid {
    grid-template-columns: 1fr;
  }
}

.sugg {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  cursor: pointer;
  transition:
    border-color 0.15s,
    transform 0.05s;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sugg:hover {
  border-color: color-mix(in oklab, var(--accent) 40%, var(--border));
}
.sugg:active {
  transform: translateY(1px);
}

.sugg-label {
  font-size: 13px;
  font-weight: 600;
}

.sugg-prompt {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.45;
}

.sugg-blurb {
  font-size: 11px;
  color: var(--accent);
  margin-top: 4px;
}

/* ==========================================================================
   Composer
   ========================================================================== */

.composer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 12px 20px 14px;
}

.composer-inner {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  gap: 8px;
  align-items: flex-end;
}

.composer textarea {
  flex: 1;
  resize: none;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
  outline: none;
  min-height: 58px;
}
.composer textarea:focus {
  border-color: color-mix(in oklab, var(--accent) 50%, var(--border));
}

.composer .btn-primary {
  padding: 10px 18px;
  align-self: stretch;
}

.composer-hint {
  max-width: 760px;
  margin: 6px auto 0;
  font-size: 11px;
  color: var(--text-muted);
}