:root{
  --bg: #f7f7fc;
  --panel: #ffffff;
  --muted: #6b7280;
  --accent: #0A84FF;
  --bubble-user: #d1e7ff;
  --bubble-bot: #f1f3f5;
  --shadow: 0 6px 24px rgba(16,24,40,0.09);
  --radius: 12px;
  --max-width: 900px;
  --sidebar-width: 220px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Segoe UI Mono", "Helvetica Neue", monospace;
  --ui-font: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  --text-color: #0f172a;
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:var(--ui-font);background:var(--bg);color:var(--text-color)}
.app{display:flex;min-height:100vh;align-items:flex-start;justify-content:center;padding:24px}

/* Sidebar */
.sidebar{
  width:var(--sidebar-width);
  background:var(--panel);
  border-radius:var(--radius);
  padding:14px;
  margin-right:18px;
  box-shadow:var(--shadow);
  display:flex;
  flex-direction:column;
  gap:12px;
  height:calc(100vh - 48px);
  overflow:auto;
}
.logo{display:flex;gap:10px;align-items:center}
.logo-mark{
  width:40px;height:40px;border-radius:8px;background:linear-gradient(135deg,#0A84FF,#3B82F6);
  color:white;display:flex;align-items:center;justify-content:center;font-weight:700;
}
.logo-text{font-weight:700}
.new-chat{
  background:#0A84FF;color:white;padding:10px;border-radius:10px;text-align:center;cursor:pointer;font-weight:600;
}
.history{display:flex;flex-direction:column;gap:8px;margin-top:8px}
.history .item{
  padding:8px;
  border-radius:8px;
  background:#f3f4f6;
  color:var(--text-color);
  cursor:pointer;
  font-size:14px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.sidebar-footer{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:8px}
.theme-toggle{background:transparent;border:1px solid #e6e7eb;padding:6px;border-radius:8px;cursor:pointer}
.version{font-size:12px;color:var(--muted)}

/* Main panel */
.main{width:calc(var(--max-width));max-width:100%;display:flex;flex-direction:column;gap:12px}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 12px}
.title{margin:0;font-size:18px}
.btn{border:1px solid #dde3ee;background:white;padding:6px 10px;border-radius:8px;cursor:pointer}
.btn.small{padding:6px 8px;font-size:13px}

/* Chat frame */
.chat-frame{background:var(--panel);border-radius:12px;box-shadow:var(--shadow);display:flex;flex-direction:column;min-height:520px;overflow:hidden}
.messages{
  padding:18px;
  flex:1;
  overflow:auto;
  background:linear-gradient(180deg, rgba(0,0,0,0.02), transparent);
  display:flex;
  flex-direction:column;
  gap:12px;
}
.msg{display:flex;gap:10px;max-width:85%;align-items:flex-end}
.msg.bot{align-self:flex-start}
.msg.user{align-self:flex-end;flex-direction:row-reverse}
.avatar{
  width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-weight:700;color:white;background:#94a3b8
}
.bubble{
  padding:12px 40px 12px 14px; /* extra right padding for copy button */
  border-radius:12px;
  line-height:1.45;
  box-shadow:0 1px 0 rgba(0,0,0,0.02);
  position:relative;
  white-space:pre-wrap;
  word-wrap:break-word;
  color:var(--text-color);
}
.bubble.bot{background:var(--bubble-bot);border-top-left-radius:6px}
.bubble.user{background:var(--bubble-user);border-top-right-radius:6px}

/* Copy button inside bubble */
.copy-btn{
  border:none;
  background:transparent;
  cursor:pointer;
  font-size:14px;
  position:absolute;
  top:8px;
  right:8px;
  padding:4px;
  color:var(--accent);
  z-index:10;
}

/* JSON table styles */
.table-inline{margin-top:6px;border:1px solid #e6e7eb;border-radius:8px;overflow:auto}
.table-inline table{width:100%;border-collapse:collapse}
.table-inline th, .table-inline td{padding:8px;border-bottom:1px solid #eef2f6;font-size:13px;text-align:left}
.table-inline th{background:#f3f4f6;color:var(--text-color)}

/* ✅ NEW: AI table auto-fit + responsive */
.ai-table {
  width: 100%;
  table-layout: auto;      /* auto expand/contract columns */
  word-wrap: break-word;   /* wrap long text */
  white-space: normal;
  overflow-wrap: break-word;
  max-width: 100%;
}

/* Composer area */
.composer{display:flex;align-items:flex-end;padding:12px;border-top:1px solid #edf2f7;gap:8px}
.input{flex:1;padding:10px 12px;border-radius:10px;border:1px solid #e6e7eb;resize:none;font-size:15px;min-height:44px;color:var(--text-color);background:var(--panel);}
.icon-btn{border:0;background:transparent;cursor:pointer;font-size:18px;color:var(--text-color)}
.send-btn{background:var(--accent);color:white;padding:10px 14px;border-radius:10px;border:0;cursor:pointer}

/* Responsive */
@media (max-width:920px){
  .sidebar{display:none}
  .main{width:100%}
}

/* DARK theme */
:root[data-theme="dark"]{
  --bg:#0b1220;
  --panel:#0b1220;
  --muted:#94a3b8;
  --accent:#6aa6ff;
  --bubble-user:#00467f;
  --bubble-bot:#1a1f2c;
  --text-color:#e6eef8;
}

:root[data-theme="dark"] body{background:var(--bg);color:var(--text-color)}
:root[data-theme="dark"] .sidebar{background:#081223}
:root[data-theme="dark"] .logo-mark{background:linear-gradient(135deg,#6aa6ff,#3b82f6)}
:root[data-theme="dark"] .new-chat{background:#1f6feb}
:root[data-theme="dark"] .history .item{background:var(--bubble-user);color:var(--text-color)}
:root[data-theme="dark"] .bubble.bot{background:var(--bubble-bot);color:var(--text-color)}
:root[data-theme="dark"] .bubble.user{background:var(--bubble-user);color:var(--text-color)}
:root[data-theme="dark"] .messages{background:linear-gradient(180deg, rgba(255,255,255,0.02), transparent)}
:root[data-theme="dark"] .composer .input{background:#1a1f2c;color:var(--text-color);border:1px solid #2c3242}
:root[data-theme="dark"] .composer .icon-btn{color:var(--text-color)}
:root[data-theme="dark"] .table-inline th {background: var(--bubble-user); color: #ffffff;}
:root[data-theme="dark"] .table-inline td {color: #e6eef8;}

/* ============================
   ULTRA-COMPACT CHATGPT-STYLE SPACING
   ============================ */

/* Headings: extremely tight */
.chat-response h1,
.chat-response h2,
.chat-response h3,
.chat-response h4,
.chat-response h5,
.chat-response h6,
.bubble.bot h1,
.bubble.bot h2,
.bubble.bot h3,
.bubble.bot h4,
.bubble.bot h5,
.bubble.bot h6 {
  margin-top: 8px !important;
  margin-bottom: 4px !important;
  line-height: 1.15 !important;
}

/* Paragraphs super tight */
.chat-response p,
.bubble.bot p {
  margin: 0 !important;
  padding: 0 !important;
  line-height: 1.28 !important;
}

/* Bullet & number lists compact */
.chat-response ul,
.chat-response ol,
.bubble.bot ul,
.bubble.bot ol {
  margin: 0 0 4px 20px !important;
  padding: 0 !important;
}

.chat-response li,
.bubble.bot li {
  margin: 0 !important;
  padding: 0 !important;
  line-height: 1.28 !important;
}

/* Nested lists */
.chat-response ul ul,
.chat-response ol ol,
.chat-response ul ol,
.chat-response ol ul,
.bubble.bot ul ul,
.bubble.bot ol ol,
.bubble.bot ul ol,
.bubble.bot ol ul {
  margin-top: 2px !important;
  margin-bottom: 2px !important;
}

/* Code blocks */
.chat-response pre code,
.bubble.bot pre code {
  margin: 4px 0 !important;
  line-height: 1.2 !important;
}

/* Inline tables — tightest possible clean layout */
.table-inline table {
  border-collapse: collapse;
  width: 100%;
  margin: 4px 0 !important;
}

.table-inline th,
.table-inline td {
  padding: 2px 4px !important;
  border: 1px solid #ccc;
  line-height: 1.2 !important;
}

/* Remove extra whitespace after table */
.table-inline {
  margin-bottom: 4px !important;
}

/* Final safety override so nothing adds big gaps */
.chat-response *,
.bubble.bot * {
  margin-top: 0.2rem !important;
  margin-bottom: 0.2rem !important;
}