:root {
  color-scheme: dark;
  --bg: #000;
  --panel: #0a0a0a;
  --border: #3a3a3a;
  --text: #f2f2f2;
  --muted: #8a8a8a;
  --cyan: #22d3ee;
  --cyan-dim: #0891b2;
  --danger: #f87171;
  --scrollbar: #22d3ee;
  --scrollbar-track: #1a1a1a;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;
}

.app {
  display: grid;
  grid-template-rows: auto 1fr auto auto;
  height: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 16px 10px;
  gap: 10px;
  overflow: hidden;
}

.logo-panel {
  border: 1px solid var(--border);
  padding: 12px 16px 10px;
  text-align: center;
  background: var(--panel);
}

.logo {
  margin: 0;
  color: var(--cyan);
  font-size: clamp(0.45rem, 1.4vw, 0.72rem);
  line-height: 1.15;
  overflow-x: auto;
}

.social-link {
  display: inline-block;
  margin-top: 8px;
  color: var(--cyan);
  text-decoration: none;
  font-size: 0.85rem;
}

.social-link:hover {
  text-decoration: underline;
}

.chat-layout {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 0;
  overflow: hidden;
  gap: 10px;
}

.chat-layout.models-open {
  grid-template-columns: 1fr 340px;
}

.chat-panel,
.models-panel {
  border: 1px solid var(--border);
  background: var(--panel);
  min-height: 0;
}

.chat-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar) var(--scrollbar-track);
}

.chat-messages::-webkit-scrollbar {
  width: 10px;
}

.chat-messages::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--scrollbar);
  border-radius: 8px;
  border: 2px solid var(--scrollbar-track);
}

.welcome p,
.footer-meta,
.models-header p,
.input-label {
  color: var(--muted);
  font-size: 0.85rem;
}

.welcome p {
  margin: 0 0 8px;
}

.message-block {
  margin-bottom: 18px;
}

.message-meta {
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 8px;
}

.message-meta strong {
  color: var(--text);
}

.message-meta .zylo {
  color: var(--cyan);
}

.message-body {
  word-break: break-word;
  line-height: 1.55;
}

.message-body.plain-text {
  white-space: pre-wrap;
}

.message-body.markdown-body {
  white-space: normal;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
}

.message-body.markdown-body > :first-child {
  margin-top: 0;
}

.message-body.markdown-body > :last-child {
  margin-bottom: 0;
}

.message-body.markdown-body h1,
.message-body.markdown-body h2,
.message-body.markdown-body h3,
.message-body.markdown-body h4 {
  color: var(--cyan);
  margin: 1.1em 0 0.45em;
  line-height: 1.3;
}

.message-body.markdown-body h1 {
  font-size: 1.35rem;
}

.message-body.markdown-body h2 {
  font-size: 1.15rem;
}

.message-body.markdown-body h3 {
  font-size: 1rem;
}

.message-body.markdown-body p,
.message-body.markdown-body ul,
.message-body.markdown-body ol,
.message-body.markdown-body blockquote,
.message-body.markdown-body pre,
.message-body.markdown-body table {
  margin: 0.65em 0;
}

.message-body.markdown-body ul,
.message-body.markdown-body ol {
  padding-left: 1.4em;
}

.message-body.markdown-body li + li {
  margin-top: 0.25em;
}

.message-body.markdown-body blockquote {
  border-left: 3px solid var(--cyan-dim);
  margin-left: 0;
  padding-left: 1em;
  color: var(--muted);
}

.message-body.markdown-body code,
.message-body.markdown-body pre {
  font-family: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;
}

.message-body.markdown-body code.inline-code {
  background: rgba(34, 211, 238, 0.14);
  color: #67e8f9;
  border: 1px solid rgba(34, 211, 238, 0.28);
  padding: 0.12em 0.4em;
  border-radius: 4px;
  font-size: 0.88em;
  font-weight: 500;
}

.message-body.markdown-body .code-block-wrap {
  position: relative;
  margin: 0.85em 0;
}

.message-body.markdown-body .code-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.75);
  color: var(--muted);
  padding: 0;
  border-radius: 4px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.message-body.markdown-body .code-copy-btn .code-copy-icon {
  display: block;
}

.message-body.markdown-body .code-copy-btn:hover,
.message-body.markdown-body .code-copy-btn:focus {
  outline: none;
  border-color: var(--cyan);
  color: var(--cyan);
}

.message-body.markdown-body .code-copy-btn.copied {
  border-color: var(--cyan);
  color: var(--cyan);
}

.message-body.markdown-body pre.code-block {
  background: #0d1117;
  border: 1px solid var(--border);
  border-left: 3px solid var(--cyan);
  padding: 36px 0 0;
  overflow-x: auto;
  border-radius: 6px;
  margin: 0;
}

.message-body.markdown-body pre.code-block .code-lang {
  display: block;
  padding: 0 44px 6px 16px;
  color: var(--muted);
  font-size: 0.72em;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.message-body.markdown-body pre.code-block code {
  display: block;
  background: none;
  color: #e6edf3;
  padding: 0 16px 14px;
  font-size: 0.84em;
  line-height: 1.5;
  white-space: pre;
}

.message-body.markdown-body a {
  color: var(--cyan);
}

.message-body.markdown-body a:hover {
  text-decoration: underline;
}

.message-body.markdown-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1em 0;
}

.message-body.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.9em;
}

.message-body.markdown-body th,
.message-body.markdown-body td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
}

.message-body.markdown-body th {
  color: var(--cyan);
}

.divider {
  color: var(--border);
  margin: 14px 0;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.thinking {
  color: var(--muted);
}

.thinking::before {
  content: "✦ ";
  color: var(--cyan);
}

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

.done-text {
  color: var(--muted);
  font-size: 0.8rem;
}

.models-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.models-panel.hidden {
  display: none;
}

.models-header {
  position: relative;
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--border);
}

.models-header h2 {
  margin: 0 0 4px;
  color: var(--cyan);
  font-size: 1rem;
}

.icon-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  width: 28px;
  height: 28px;
  cursor: pointer;
}

.models-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar) var(--scrollbar-track);
}

.model-item {
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  padding: 10px;
  margin-bottom: 6px;
  cursor: pointer;
  border-radius: 4px;
}

.model-item:hover,
.model-item.active {
  border-color: var(--cyan-dim);
  background: rgba(34, 211, 238, 0.08);
}

.model-item.active {
  background: rgba(34, 211, 238, 0.16);
}

.model-item-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}

.model-name {
  color: var(--text);
  font-size: 0.82rem;
}

.model-provider {
  color: var(--muted);
  font-size: 0.75rem;
}

.badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.68rem;
  border-radius: 999px;
}

.models-detail {
  border-top: 1px solid var(--border);
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.models-detail strong {
  color: var(--cyan);
}

.input-panel {
  border: 1px solid var(--border);
  background: var(--panel);
  padding: 10px 12px 12px;
}

.chart-preview {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  padding: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
}

.chart-preview.hidden {
  display: none;
}

.chart-preview img {
  max-height: 72px;
  max-width: 160px;
  border: 1px solid var(--border);
  border-radius: 4px;
  object-fit: contain;
}

.chart-remove-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  width: 28px;
  height: 28px;
  cursor: pointer;
  font: inherit;
}

.chart-remove-btn:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.input-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: end;
}

.attach-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  width: 42px;
  height: 42px;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
}

.attach-btn:hover,
.attach-btn.active {
  border-color: var(--cyan);
  color: var(--cyan);
}

#chatInput {
  width: 100%;
  resize: vertical;
  min-height: 54px;
  max-height: 180px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
}

#chatInput:focus {
  outline: none;
  border-color: var(--cyan);
}

.send-btn,
.footer-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 8px 12px;
  cursor: pointer;
  font: inherit;
}

.send-btn:hover,
.footer-btn:hover,
.icon-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.footer {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.78rem;
}

.footer-powered {
  margin-left: auto;
}

@media (max-width: 900px) {
  .chat-layout.models-open {
    grid-template-columns: 1fr;
  }

  .models-panel {
    max-height: 320px;
  }
}