:root{
  --sidebar-w: 280px;
  --brand: #10a37f;
  --muted: #e5e7eb;
}

/* Lock page scroll to the app viewport */
html, body {
    height: 100%;
    margin: 0;
    background-color: #f9f9f9;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
    overflow: hidden;
    font-size: 14px;
}

/* App fills viewport and uses a 2-column layout */
#app { display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar stays visible; only its list scrolls */
aside#sidebar {
    flex: 0 0 var(--sidebar-w);
    width: var(--sidebar-w);
    background: #0b0c0f;
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-right: 1px solid rgba(255,255,255,0.08);
}

#msg {
  color:#22c55e;
}

.title-row {
  display: flex;
  align-items: flex-start;
  gap: 4px;
}
.ctitle {
  flex: 1 1 auto;
  max-height: 40px;
  overflow: hidden;
  line-clamp: auto;
  cursor: text;
}
.retitle-btn {
  flex: 0 0 auto;
  background: none;
  border: none;
  color: #9ca3af;
  font-size: 14px;
  cursor: pointer;
  padding: 0;
  height: auto;
  line-height: 1;
  opacity: 0;
  transition: opacity 0.15s;
}
#convlist li:hover .retitle-btn,
#convlist li.active .retitle-btn { opacity: 1; }
.retitle-btn:hover { color: #fff; }
.ctitle[contenteditable="true"] {
  outline: 1px solid var(--brand);
  border-radius: 4px;
  padding: 2px 4px;
  max-height: none;
  background: rgba(255,255,255,0.1);
}

.sidebar-header{
  padding: 16px 16px 8px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-header h1{
    font-size: 16px;
    margin: 0 0 8px 0;
    color: #fff;
}

.sidebar-actions{ display:flex; gap:8px; }
.sidebar-actions button{
    height: 34px;
    padding: 0 10px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.04);
    color:#fff;
    cursor:pointer;
}
.sidebar-actions button.primary{ background: var(--brand); border-color: var(--brand); }
#convlist{
  list-style:none; margin:0; padding:8px; overflow-y:auto; flex:1 1 auto; min-height:0;
}
#convlist li{
    border:1px solid rgba(255,255,255,0.08);
    border-radius: 10px;
    padding:10px;
    margin:8px;
    cursor:pointer;
    background: rgba(255,255,255,0.02);
}
#convlist li.active{ border-color: #9ce6d4; background: rgba(16,163,127,0.18); color:#fff; }
#convlist .subtitle{ display:block; font-size:12px; opacity:0.7; margin-top:4px; }
.footer{ padding:10px; font-size:12px; opacity:0.7; border-top: 1px solid rgba(255,255,255,0.08); }

/* Main area: column with sticky footer (.composer) and only chat scrolling */
main#wrapper {
    flex: 1 1 auto;
    min-width: 0;
    min-height: 0;
    display: flex;
    flex-direction: column;
    background: #fff;
    max-width: 1024px;
    margin-left: auto;
    margin-right: auto;
}
.topbar {
    flex: 0 0 auto;
    border-bottom: 1px solid var(--muted);
    background:#fff;
}

.headtxt { font-size: 1.2rem; padding: 10px 16px; }
#status{ margin-left: 16px; color:#6b7280; }

/* Chat container = [chatdiv (scrolls) + composer (fixed at bottom) ] */
#container{
    flex:1 1 auto;
    min-height:0;
    display:flex;
    flex-direction:column;
    width:100%;
    overflow:hidden;
}

#chatdiv{
    flex:1 1 auto;
    min-height:0;
    overflow-y:auto;
    display:flex;
    flex-direction:column;
    gap:8px;
    padding:24px 20px;
}

#chatdiv p {
    background-color: #f9f9f9;
    padding: 8px 12px;
    border-radius: 12px;
    display: inline-block;
    margin: 0;
}

#chatdiv h1,h2,h3,h4,h5,h6 {
    margin-bottom: 0;
}

#chatdiv ul, #chatdiv ol {
    background-color: #f9f9f9;
    padding: 8px 12px 8px 32px;
    border-radius: 12px;
    margin: 4px 0;
}

#chatdiv li {
    margin: 4px 0;
    line-height: 1.5;
}

#chatdiv hr {
    border: none;
    border-top: 1px solid var(--muted);
    margin: 16px 0;
}

#chatdiv table {
    border-collapse: collapse;
    width: 100%;
    margin: 8px 0;
    font-size: 13px;
}
#chatdiv th, #chatdiv td {
    border: 1px solid #d1d5db;
    padding: 6px 10px;
    text-align: left;
}
#chatdiv th {
    background: #f3f4f6;
    font-weight: 600;
}
#chatdiv tbody tr:nth-child(even) td {
    background: #f9fafb;
}

.composer{ flex:0 0 auto;
    width:100%;
    border-top:1px solid var(--muted);
    background:#fff;
    padding:12px 0;
}

.input-row{ display:flex;
    gap:8px;
    align-items:flex-end;
    margin: 0 12px 12px 12px;
}

#chatin{
  box-sizing:border-box;
    flex:1 1 auto;
    min-height:40px;
    max-height:240px;
    padding:10px 12px;
    border:1px solid var(--muted);
    border-radius:10px;
    resize:none;
}

#chatin:focus { border-color: var(--brand);
    outline:none;
    box-shadow: 0 0 0 3px rgba(16,163,127,0.2);
}

.userdata {
    align-self: flex-end;
    display:inline-block;
    max-width:80%;
    background: #e6f7f1;
    color:#0b0c0f;
    padding:8px 12px;
    border-radius:12px;
    word-wrap: break-word;
    text-align:left;
    white-space: break-spaces;
}
.userdata .n { font-weight: 600;
    margin-right: 6px;
    color: #6b7280;
}

/* Prism code block chrome */
code[class*="language-"], pre[class*="language-"] { text-shadow:none; }
pre code {
  display:block;
    background:#1e1e1e !important;
    color:#d4d4d4;
    font-family:"Fira Code","Consolas","Monaco",monospace;
    font-size:14px;
    line-height:1.5;
    padding:1em;
    border-radius:8px;
    overflow-x:auto;
    white-space:pre;
    tab-size:4;
}

.code-block{position:relative;}
.copy-code{ right:10px;
    position:absolute;
    top:22px;
    height:20px;
    padding:0 5px;
}
.inline-code {
    background-color: gainsboro;
}

/* Buttons */
button{ height:40px;
    padding:0 14px;
    border-radius:10px;
    border:1px solid var(--muted);
    background:#fff;
    cursor:pointer;
}

button.primary{ background: var(--brand);
    color:#fff;
    border-color: var(--brand);
}

button.primary:hover { background: #0f8f71; }
button.ghost{ background: transparent; }
#cancel { background: #fbf1f1; }
#reset { background: #f3feff; }

/* Thinking/reasoning block */
.think-block {
    margin: 8px 0;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    background: #fafafa;
    font-size: 13px;
}
.think-block summary {
    cursor: pointer;
    padding: 6px 12px;
    color: #6b7280;
    font-style: italic;
    user-select: none;
}
.think-content {
    padding: 8px 12px;
    color: #6b7280;
    white-space: pre-wrap;
    max-height: 300px;
    overflow-y: auto;
    border-top: 1px solid #e0e0e0;
}

/* RAG source attribution */
.rag-sources {
    font-size: 12px;
    color: #6b7280;
    padding: 6px 12px;
    margin: 4px 0 8px 0;
    border-left: 3px solid var(--brand);
    background: #f0fdf4;
    border-radius: 0 6px 6px 0;
}
.rag-label { font-weight: 600; }
.rag-sources a {
    color: var(--brand);
    text-decoration: none;
}
.rag-sources a:hover { text-decoration: underline; }

/* Token usage bar */
.token-usage {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 12px 4px 12px;
    height: 16px;
}
.token-track {
    flex: 1 1 auto;
    height: 4px;
    background: #e5e7eb;
    border-radius: 2px;
    overflow: hidden;
}
.token-fill {
    height: 100%;
    width: 0%;
    background: var(--brand);
    border-radius: 2px;
    transition: width 0.3s ease, background 0.3s ease;
}
.token-label {
    flex: 0 0 auto;
    font-size: 11px;
    color: #9ca3af;
    white-space: nowrap;
}