Revamp styles and improve UI elements in index.html

Updated CSS variables for a new color palette and improved UI elements. Adjusted HTML for better accessibility and responsiveness.

static/index.html

@@ -11,28 +11,38 @@
     *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
 
     :root {
-      --bg:          #1a1814;
-      --surface:     #211f1b;
-      --card:        #272420;
-      --card2:       #2e2b27;
-      --border:      #373330;
-      --border2:     #443f3a;
-      --accent:      #e8a455;
-      --accent2:     #c8843a;
-      --accent-dim:  rgba(232,164,85,0.10);
-      --accent-glow: rgba(232,164,85,0.20);
-      --sql-keyword: #e8a455;
-      --sql-func:    #8ecfa8;
-      --sql-string:  #c8a97e;
-      --sql-num:     #a8c4e0;
-      --sql-comment: #5c5650;
-      --sql-op:      #d4a574;
-      --sql-default: #d4cfc9;
-      --danger:      #c96b5a;
-      --success:     #7ab897;
-      --text:        #e8e0d5;
-      --text2:       #b8afa4;
-      --muted:       #7a7268;
+      /* ── Core palette: slate/blue professional ── */
+      --bg:          #0d1117;
+      --surface:     #161b22;
+      --card:        #1c2128;
+      --card2:       #21262d;
+      --border:      #30363d;
+      --border2:     #3d444d;
+
+      /* ── Accent: cool indigo-blue ── */
+      --accent:      #58a6ff;
+      --accent2:     #388bfd;
+      --accent-dim:  rgba(88,166,255,0.08);
+      --accent-glow: rgba(88,166,255,0.18);
+
+      /* ── SQL syntax colors (VSCode Dark+ inspired) ── */
+      --sql-keyword: #ff7b72;   /* red-orange — SELECT FROM WHERE */
+      --sql-func:    #d2a8ff;   /* purple — COUNT AVG MAX */
+      --sql-string:  #a5d6ff;   /* light blue — 'string values' */
+      --sql-num:     #79c0ff;   /* blue — numbers */
+      --sql-comment: #484f58;   /* grey — comments */
+      --sql-op:      #ffa657;   /* orange — = < > operators */
+      --sql-table:   #56d364;   /* green — table/column identifiers */
+      --sql-default: #c9d1d9;   /* light grey — base text */
+
+      /* ── Semantic ── */
+      --danger:      #f85149;
+      --success:     #3fb950;
+      --warn:        #d29922;
+      --text:        #e6edf3;
+      --text2:       #8b949e;
+      --muted:       #484f58;
+
       --mono:        'JetBrains Mono', monospace;
       --sans:        'Inter', sans-serif;
       --radius:      8px;
@@ -43,118 +53,137 @@
 
     html, body { height: 100%; background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 14px; line-height: 1.6; overflow-x: hidden; }
 
+    /* ── Layout ── */
     #app { display: grid; grid-template-rows: var(--header-h) 1fr; grid-template-columns: var(--sidebar-w) 1fr; height: 100vh; }
 
-    /* Header */
+    /* ── Header ── */
     header { grid-column: 1/-1; display: flex; align-items: center; gap: 12px; padding: 0 20px; background: var(--surface); border-bottom: 1px solid var(--border); z-index: 100; }
     .logo-wrap { display: flex; align-items: center; gap: 10px; }
-    .logo-icon { width: 30px; height: 30px; background: linear-gradient(135deg,var(--accent),var(--accent2)); border-radius: 7px; display: flex; align-items: center; justify-content: center; font-size: 15px; flex-shrink: 0; }
+    .logo-icon { width: 30px; height: 30px; background: linear-gradient(135deg, #388bfd, #58a6ff); border-radius: 7px; display: flex; align-items: center; justify-content: center; font-size: 15px; flex-shrink: 0; box-shadow: 0 0 12px rgba(88,166,255,0.3); }
     .logo-text { font-family: var(--mono); font-weight: 600; font-size: 14px; color: var(--text); letter-spacing: -0.2px; }
     .logo-text span { color: var(--accent); }
-    #menu-btn { display: none; background: none; border: none; cursor: pointer; color: var(--text2); font-size: 20px; padding: 4px; margin-right: 4px; }
+    #menu-btn { display: none; background: none; border: none; cursor: pointer; color: var(--text2); font-size: 20px; padding: 4px; margin-right: 4px; line-height: 1; }
     .header-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
-    .clear-btn { background: none; border: 1px solid var(--border2); color: var(--muted); font-size: 11px; padding: 4px 10px; border-radius: 5px; cursor: pointer; font-family: var(--mono); letter-spacing: 0.5px; transition: all 0.15s; }
-    .clear-btn:hover { border-color: var(--danger); color: #e07a6a; }
+    .clear-btn { background: none; border: 1px solid var(--border2); color: var(--text2); font-size: 10px; padding: 4px 10px; border-radius: 5px; cursor: pointer; font-family: var(--mono); letter-spacing: 0.8px; transition: all 0.15s; text-transform: uppercase; }
+    .clear-btn:hover { border-color: var(--danger); color: var(--danger); background: rgba(248,81,73,0.06); }
     .status-wrap { display: flex; align-items: center; gap: 6px; }
     .status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); animation: blink 3s ease-in-out infinite; }
-    .status-dot.ready { background: var(--success); animation: pulse-ok 2s ease-in-out infinite; }
+    .status-dot.ready { background: var(--success); animation: pulse-ok 2.5s ease-in-out infinite; }
     @keyframes blink { 0%,100%{opacity:.4} 50%{opacity:1} }
-    @keyframes pulse-ok { 0%,100%{box-shadow:0 0 0 0 var(--accent-glow)} 50%{box-shadow:0 0 0 4px transparent} }
-    .badge { font-family: var(--mono); font-size: 10px; padding: 3px 8px; border-radius: 4px; border: 1px solid var(--border2); color: var(--muted); letter-spacing: 0.5px; }
-    .badge.active { border-color: var(--accent2); color: var(--accent); background: var(--accent-dim); }
+    @keyframes pulse-ok { 0%,100%{box-shadow:0 0 0 0 rgba(63,185,80,0.4)} 50%{box-shadow:0 0 0 5px transparent} }
+    .badge { font-family: var(--mono); font-size: 10px; padding: 3px 8px; border-radius: 4px; border: 1px solid var(--border2); color: var(--text2); letter-spacing: 0.5px; }
+    .badge.active { border-color: rgba(88,166,255,0.4); color: var(--accent); background: var(--accent-dim); }
 
-    /* Sidebar */
+    /* ── Sidebar ── */
     aside { background: var(--surface); border-right: 1px solid var(--border); display: flex; flex-direction: column; overflow: hidden; transition: transform 0.25s ease; }
     .aside-section { padding: 16px 14px 12px; border-bottom: 1px solid var(--border); }
     .section-label { font-family: var(--mono); font-size: 9px; letter-spacing: 1.5px; color: var(--muted); text-transform: uppercase; margin-bottom: 10px; }
+
+    /* Upload */
     .upload-zone { border: 1.5px dashed var(--border2); border-radius: var(--radius); padding: 18px 12px; text-align: center; cursor: pointer; transition: all 0.2s; position: relative; background: var(--card); }
-    .upload-zone:hover, .upload-zone.dragover { border-color: var(--accent); background: var(--accent-dim); }
+    .upload-zone:hover, .upload-zone.dragover { border-color: var(--accent); background: var(--accent-dim); box-shadow: 0 0 0 3px rgba(88,166,255,0.08); }
     .upload-zone input[type="file"] { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; }
     .upload-icon { font-size: 20px; margin-bottom: 6px; display: block; }
-    .upload-zone p { font-size: 12px; color: var(--muted); line-height: 1.5; }
-    .upload-zone p strong { color: var(--text2); font-weight: 500; }
-    #file-info { display: none; background: var(--card); border: 1px solid var(--border2); border-radius: var(--radius); padding: 11px; font-size: 12px; }
+    .upload-zone p { font-size: 12px; color: var(--text2); line-height: 1.5; }
+    .upload-zone p strong { color: var(--text); font-weight: 500; }
+
+    /* File info */
+    #file-info { display: none; background: var(--card); border: 1px solid var(--border2); border-radius: var(--radius); padding: 11px; font-size: 12px; margin-top: 10px; }
     #file-info.show { display: block; }
     .file-name { font-family: var(--mono); font-size: 10px; color: var(--accent); word-break: break-all; margin-bottom: 7px; font-weight: 600; }
-    .file-info-row { display: flex; justify-content: space-between; color: var(--muted); margin-bottom: 3px; }
-    .file-info-row span:last-child { color: var(--text2); }
+    .file-info-row { display: flex; justify-content: space-between; color: var(--text2); margin-bottom: 3px; }
+    .file-info-row span:first-child { color: var(--muted); }
     .schema-label { font-family: var(--mono); font-size: 9px; letter-spacing: 1px; color: var(--muted); text-transform: uppercase; margin-top: 9px; margin-bottom: 4px; }
-    #schema-box { display: none; font-family: var(--mono); font-size: 10px; color: var(--muted); background: var(--bg); border: 1px solid var(--border); border-radius: 5px; padding: 8px; max-height: 100px; overflow-y: auto; white-space: pre-wrap; word-break: break-all; line-height: 1.7; }
+    #schema-box { display: none; font-family: var(--mono); font-size: 10px; color: var(--text2); background: var(--bg); border: 1px solid var(--border); border-radius: 5px; padding: 8px; max-height: 100px; overflow-y: auto; white-space: pre-wrap; word-break: break-all; line-height: 1.7; }
     #schema-box.show { display: block; }
+
+    /* Suggestions */
     .aside-section.suggestions { flex: 1; overflow-y: auto; }
     #suggestions-list { display: flex; flex-direction: column; gap: 5px; }
-    .suggestion-chip { padding: 7px 10px; border-radius: 6px; border: 1px solid var(--border); background: var(--card); font-size: 11px; color: var(--muted); cursor: pointer; transition: all 0.15s; text-align: left; font-family: var(--sans); }
+    .suggestion-chip { padding: 7px 10px; border-radius: 6px; border: 1px solid var(--border); background: transparent; font-size: 11px; color: var(--text2); cursor: pointer; transition: all 0.15s; text-align: left; font-family: var(--sans); line-height: 1.4; }
     .suggestion-chip:hover { border-color: var(--accent2); color: var(--text); background: var(--accent-dim); }
 
-    /* Main */
-    main { display: flex; flex-direction: column; overflow: hidden; }
-    #chat { flex: 1; overflow-y: auto; padding: 18px 20px; display: flex; flex-direction: column; gap: 16px; scroll-behavior: smooth; }
-    #empty-state { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; color: var(--muted); text-align: center; }
-    .empty-icon { font-size: 36px; animation: float 4s ease-in-out infinite; }
-    @keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-7px)} }
-    #empty-state h2 { font-size: 15px; color: var(--text2); font-weight: 500; }
-    #empty-state p { font-size: 12px; max-width: 320px; line-height: 1.7; }
-
-    /* Messages */
-    .msg { display: flex; flex-direction: column; gap: 3px; max-width: 780px; }
-    .msg.user { align-self: flex-end; align-items: flex-end; }
+    /* ── Main ── */
+    main { display: flex; flex-direction: column; overflow: hidden; background: var(--bg); }
+    #chat { flex: 1; overflow-y: auto; padding: 20px 24px; display: flex; flex-direction: column; gap: 16px; scroll-behavior: smooth; }
+
+    /* Empty state */
+    #empty-state { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; color: var(--text2); text-align: center; padding: 40px 20px; }
+    .empty-icon { font-size: 38px; animation: float 4s ease-in-out infinite; filter: drop-shadow(0 4px 12px rgba(88,166,255,0.2)); }
+    @keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
+    #empty-state h2 { font-size: 15px; color: var(--text); font-weight: 500; }
+    #empty-state p { font-size: 12px; max-width: 300px; line-height: 1.7; color: var(--text2); }
+
+    /* ── Messages ── */
+    .msg { display: flex; flex-direction: column; gap: 3px; max-width: 800px; width: 100%; }
+    .msg.user { align-self: flex-end; align-items: flex-end; max-width: 75%; }
     .msg.assistant { align-self: flex-start; align-items: flex-start; }
     .msg-meta { font-size: 10px; color: var(--muted); font-family: var(--mono); padding: 0 4px; }
     .bubble { padding: 11px 15px; border-radius: var(--radius-lg); font-size: 13.5px; line-height: 1.65; }
-    .msg.user .bubble { background: linear-gradient(135deg,var(--accent),var(--accent2)); color: #1a1410; border-bottom-right-radius: 4px; font-weight: 500; }
-    .msg.assistant .bubble { background: var(--card); border: 1px solid var(--border); border-bottom-left-radius: 4px; color: var(--text); }
+    .msg.user .bubble { background: var(--accent2); color: #fff; border-bottom-right-radius: 4px; font-weight: 400; }
+    .msg.assistant .bubble { background: var(--card); border: 1px solid var(--border); border-bottom-left-radius: 4px; color: var(--text); width: 100%; }
 
-    /* SQL block */
-    .sql-block { background: var(--bg); border: 1px solid var(--border2); border-radius: var(--radius); margin-top: 10px; overflow: hidden; }
+    /* ── SQL Block ── */
+    .sql-block { background: #010409; border: 1px solid var(--border2); border-radius: var(--radius); margin-top: 10px; overflow: hidden; }
     .sql-block-header { display: flex; align-items: center; justify-content: space-between; padding: 7px 12px; background: var(--card2); border-bottom: 1px solid var(--border); }
-    .sql-block-header span { font-family: var(--mono); font-size: 9px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent); }
-    .copy-btn { background: none; border: 1px solid var(--border2); color: var(--muted); font-size: 10px; padding: 3px 8px; border-radius: 4px; cursor: pointer; font-family: var(--mono); transition: all 0.15s; }
+    .sql-block-label { display: flex; align-items: center; gap: 6px; }
+    .sql-dot { width: 8px; height: 8px; border-radius: 50%; }
+    .sql-dot-r { background: #f85149; }
+    .sql-dot-y { background: #d29922; }
+    .sql-dot-g { background: #3fb950; }
+    .sql-block-header span.sql-lang { font-family: var(--mono); font-size: 9px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--text2); margin-left: 4px; }
+    .copy-btn { background: none; border: 1px solid var(--border2); color: var(--text2); font-size: 10px; padding: 3px 8px; border-radius: 4px; cursor: pointer; font-family: var(--mono); transition: all 0.15s; }
     .copy-btn:hover { border-color: var(--accent); color: var(--accent); }
-    .sql-code { padding: 14px 16px; font-family: var(--mono); font-size: 12.5px; line-height: 2; color: var(--sql-default); white-space: pre-wrap; word-break: break-word; }
-    .sql-code .kw { color: var(--sql-keyword); font-weight: 600; }
-    .sql-code .fn { color: var(--sql-func); }
-    .sql-code .st { color: var(--sql-string); }
-    .sql-code .nm { color: var(--sql-num); }
-    .sql-code .cm { color: var(--sql-comment); font-style: italic; }
-    .sql-code .op { color: var(--sql-op); }
-
-    /* Table */
-    .result-table-wrap { margin-top: 10px; border: 1px solid var(--border); border-radius: var(--radius); overflow: auto; max-height: 300px; }
+
+    /* SQL syntax highlighting */
+    .sql-code { padding: 16px 18px; font-family: var(--mono); font-size: 12.5px; line-height: 2; color: var(--sql-default); white-space: pre-wrap; word-break: break-word; }
+    .sql-code .kw  { color: var(--sql-keyword); font-weight: 600; }   /* SELECT FROM WHERE */
+    .sql-code .fn  { color: var(--sql-func); }                          /* COUNT AVG */
+    .sql-code .st  { color: var(--sql-string); }                        /* 'strings' */
+    .sql-code .nm  { color: var(--sql-num); }                           /* numbers */
+    .sql-code .cm  { color: var(--sql-comment); font-style: italic; }   /* -- comments */
+    .sql-code .op  { color: var(--sql-op); }                            /* = < > */
+    .sql-code .id  { color: var(--sql-table); }                         /* identifiers */
+
+    /* ── Result Table ── */
+    .result-table-wrap { margin-top: 10px; border: 1px solid var(--border); border-radius: var(--radius); overflow: auto; max-height: 280px; }
     table { width: 100%; border-collapse: collapse; font-size: 12px; }
     thead th { position: sticky; top: 0; background: var(--card2); padding: 8px 13px; text-align: left; font-family: var(--mono); font-size: 10px; color: var(--accent); letter-spacing: 0.8px; border-bottom: 1px solid var(--border2); white-space: nowrap; }
     tbody tr { border-bottom: 1px solid var(--border); transition: background 0.1s; }
     tbody tr:last-child { border-bottom: none; }
-    tbody tr:hover { background: rgba(232,164,85,0.05); }
-    td { padding: 7px 13px; color: var(--text2); white-space: nowrap; }
+    tbody tr:hover { background: rgba(88,166,255,0.04); }
+    td { padding: 7px 13px; color: var(--text2); white-space: nowrap; font-size: 12px; }
     .result-count { font-family: var(--mono); font-size: 10px; color: var(--muted); margin-top: 5px; padding-left: 2px; }
-    .error-bubble { background: rgba(201,107,90,0.08); border: 1px solid rgba(201,107,90,0.3); border-radius: var(--radius); padding: 10px 14px; font-size: 12px; color: #e07a6a; margin-top: 8px; font-family: var(--mono); }
+
+    /* Error */
+    .error-bubble { background: rgba(248,81,73,0.06); border: 1px solid rgba(248,81,73,0.25); border-radius: var(--radius); padding: 10px 14px; font-size: 12px; color: #ffa198; margin-top: 8px; font-family: var(--mono); }
 
     /* Thinking */
     .thinking { display: flex; gap: 5px; align-items: center; padding: 12px 16px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); border-bottom-left-radius: 4px; }
     .thinking span { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); animation: think 1.2s ease-in-out infinite; }
     .thinking span:nth-child(2){animation-delay:.2s} .thinking span:nth-child(3){animation-delay:.4s}
-    @keyframes think { 0%,60%,100%{transform:translateY(0);opacity:.35} 30%{transform:translateY(-6px);opacity:1} }
+    @keyframes think { 0%,60%,100%{transform:translateY(0);opacity:.3} 30%{transform:translateY(-6px);opacity:1} }
 
-    /* Input */
+    /* ── Input Bar ── */
     .input-bar { padding: 12px 20px 14px; background: var(--surface); border-top: 1px solid var(--border); }
     .input-row { display: flex; gap: 9px; align-items: flex-end; }
-    #question-input { flex: 1; background: var(--card); border: 1.5px solid var(--border2); border-radius: var(--radius); padding: 10px 13px; font-size: 14px; font-family: var(--sans); color: var(--text); resize: none; min-height: 44px; max-height: 120px; outline: none; transition: border-color 0.2s; line-height: 1.5; }
-    #question-input:focus { border-color: var(--accent); }
+    #question-input { flex: 1; background: var(--card); border: 1.5px solid var(--border2); border-radius: var(--radius); padding: 10px 13px; font-size: 14px; font-family: var(--sans); color: var(--text); resize: none; min-height: 44px; max-height: 120px; outline: none; transition: border-color 0.2s, box-shadow 0.2s; line-height: 1.5; }
+    #question-input:focus { border-color: var(--accent2); box-shadow: 0 0 0 3px rgba(88,166,255,0.1); }
     #question-input::placeholder { color: var(--muted); }
-    #question-input:disabled { opacity: 0.5; cursor: not-allowed; }
-    #send-btn { background: linear-gradient(135deg,var(--accent),var(--accent2)); color: #1a1410; border: none; border-radius: var(--radius); width: 44px; height: 44px; cursor: pointer; font-size: 18px; display: flex; align-items: center; justify-content: center; transition: all 0.2s; flex-shrink: 0; font-weight: 700; }
-    #send-btn:hover { opacity: 0.88; transform: scale(1.04); }
-    #send-btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none; }
+    #question-input:disabled { opacity: 0.4; cursor: not-allowed; }
+    #send-btn { background: var(--accent2); color: #fff; border: none; border-radius: var(--radius); width: 44px; height: 44px; cursor: pointer; font-size: 18px; display: flex; align-items: center; justify-content: center; transition: all 0.2s; flex-shrink: 0; font-weight: 700; }
+    #send-btn:hover { background: var(--accent); box-shadow: 0 0 12px rgba(88,166,255,0.35); transform: scale(1.04); }
+    #send-btn:disabled { opacity: 0.3; cursor: not-allowed; transform: none; box-shadow: none; }
     .input-hint { font-size: 11px; color: var(--muted); margin-top: 5px; padding-left: 2px; }
 
     /* Toast */
-    #toast { position: fixed; bottom: 20px; right: 20px; background: var(--card2); border: 1px solid var(--border2); border-radius: var(--radius); padding: 9px 15px; font-size: 12px; font-family: var(--mono); color: var(--text); z-index: 9999; transform: translateY(50px); opacity: 0; transition: all 0.3s cubic-bezier(.34,1.56,.64,1); pointer-events: none; }
+    #toast { position: fixed; bottom: 20px; right: 20px; background: var(--card2); border: 1px solid var(--border2); border-radius: var(--radius); padding: 9px 15px; font-size: 12px; font-family: var(--mono); color: var(--text); z-index: 9999; transform: translateY(50px); opacity: 0; transition: all 0.3s cubic-bezier(.34,1.56,.64,1); pointer-events: none; max-width: 280px; }
     #toast.show { transform: translateY(0); opacity: 1; }
-    #toast.success { border-color: var(--success); color: #8ecfa8; }
-    #toast.error { border-color: var(--danger); color: #e07a6a; }
+    #toast.success { border-color: rgba(63,185,80,0.4); color: #56d364; }
+    #toast.error { border-color: rgba(248,81,73,0.4); color: #ffa198; }
 
     /* Loading bar */
-    #loading-bar { position: fixed; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg,var(--accent),var(--accent2)); z-index: 10000; transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease; }
+    #loading-bar { position: fixed; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--accent2), var(--accent), #79c0ff); z-index: 10000; transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease; }
     #loading-bar.active { transform: scaleX(0.8); }
     #loading-bar.done { transform: scaleX(1); opacity: 0; transition: opacity 0.4s 0.1s; }
 
@@ -162,9 +191,10 @@
     ::-webkit-scrollbar { width: 5px; height: 5px; }
     ::-webkit-scrollbar-track { background: transparent; }
     ::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 10px; }
+    ::-webkit-scrollbar-thumb:hover { background: var(--text2); }
 
-    /* Overlay */
-    #overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.55); z-index: 90; }
+    /* Mobile overlay */
+    #overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 90; backdrop-filter: blur(2px); }
     #overlay.show { display: block; }
 
     /* ── RESPONSIVE ── */
@@ -172,28 +202,31 @@
       :root { --sidebar-w: 240px; }
       #chat { padding: 14px 16px; }
       .input-bar { padding: 10px 16px 12px; }
+      .msg.user { max-width: 85%; }
     }
 
     @media (max-width: 640px) {
       :root { --header-h: 50px; }
       #app { grid-template-columns: 1fr; }
-      #menu-btn { display: flex; }
-      aside { position: fixed; top: var(--header-h); left: 0; width: 280px; height: calc(100vh - var(--header-h)); z-index: 95; transform: translateX(-100%); box-shadow: 4px 0 20px rgba(0,0,0,0.4); }
+      #menu-btn { display: flex; align-items: center; }
+      aside { position: fixed; top: var(--header-h); left: 0; width: 80vw; max-width: 300px; height: calc(100vh - var(--header-h)); z-index: 95; transform: translateX(-100%); box-shadow: 6px 0 24px rgba(0,0,0,0.5); }
       aside.open { transform: translateX(0); }
       main { grid-column: 1; }
-      .msg { max-width: 95%; }
+      .msg { max-width: 100%; }
+      .msg.user { max-width: 88%; }
       #chat { padding: 12px; gap: 12px; }
       .bubble { padding: 10px 13px; font-size: 13px; }
-      .sql-code { font-size: 11.5px; padding: 12px; }
-      td, thead th { padding: 7px 10px; }
+      .sql-code { font-size: 11px; padding: 12px; line-height: 1.8; }
+      td, thead th { padding: 6px 10px; font-size: 11px; }
       .input-bar { padding: 8px 12px 10px; }
       .input-hint { display: none; }
       .status-wrap .badge { display: none; }
+      #toast { bottom: 12px; right: 12px; left: 12px; max-width: none; }
     }
 
     @media (max-width: 380px) {
       .logo-text { font-size: 13px; }
-      .clear-btn { padding: 3px 7px; font-size: 10px; }
+      .clear-btn { padding: 3px 7px; font-size: 9px; }
     }
   </style>
 </head>
@@ -210,10 +243,10 @@
       <div class="logo-text">Query<span>Mind</span></div>
     </div>
     <div class="header-right">
-      <button class="clear-btn" onclick="clearChat()">CLEAR</button>
+      <button class="clear-btn" onclick="clearChat()">Clear</button>
       <div class="status-wrap">
         <span id="status-dot" class="status-dot"></span>
-        <span id="status-label" class="badge">LOADING</span>
+        <span id="status-label" class="badge">Loading</span>
       </div>
     </div>
   </header>
@@ -237,7 +270,7 @@
     <div class="aside-section suggestions">
       <div class="section-label">Example Queries</div>
       <div id="suggestions-list">
-        <div class="suggestion-chip" style="color:var(--muted);font-style:italic;cursor:default;">Upload CSV to see examples</div>
+        <div class="suggestion-chip" style="cursor:default;font-style:italic;">Upload CSV to see examples</div>
       </div>
     </div>
   </aside>
@@ -247,13 +280,13 @@
       <div id="empty-state">
         <div class="empty-icon">🗂️</div>
         <h2>Ask anything about your data</h2>
-        <p>Upload a CSV from the sidebar, then ask a question in plain English. QueryMind converts it to SQL and shows results.</p>
+        <p>Upload a CSV from the sidebar, then ask a question in plain English. QueryMind converts it to SQL and shows results instantly.</p>
       </div>
     </div>
     <div class="input-bar">
       <div class="input-row">
         <textarea id="question-input" placeholder="e.g. Show top 10 rows by sales…" rows="1" disabled></textarea>
-        <button id="send-btn" disabled>↑</button>
+        <button id="send-btn" disabled title="Send (Enter)">↑</button>
       </div>
       <div class="input-hint">Enter to send &nbsp;·&nbsp; Shift+Enter new line</div>
     </div>
@@ -285,7 +318,7 @@
   checkHealth();
 
   let toastTimer;
-  function showToast(msg,type='success'){ toast.textContent=msg; toast.className=`show ${type}`; clearTimeout(toastTimer); toastTimer=setTimeout(()=>toast.className='',3000); }
+  function showToast(msg,type='success'){ toast.textContent=msg; toast.className=`show ${type}`; clearTimeout(toastTimer); toastTimer=setTimeout(()=>toast.className='',3200); }
 
   function startLoading(){ loadingBar.className='active'; isLoading=true; sendBtn.disabled=true; input.disabled=true; }
   function stopLoading(){ loadingBar.className='done'; isLoading=false; if(sessionId){sendBtn.disabled=false;input.disabled=false;} setTimeout(()=>loadingBar.className='',600); }
@@ -351,19 +384,31 @@
   }
 
   function highlightSQL(raw){
-    const kw=/\b(SELECT|FROM|WHERE|AND|OR|NOT|IN|IS|NULL|LIKE|BETWEEN|ORDER BY|GROUP BY|HAVING|LIMIT|OFFSET|DISTINCT|AS|JOIN|LEFT|RIGHT|INNER|OUTER|ON|UNION|ALL|INSERT|UPDATE|DELETE|CREATE|TABLE|DROP|ALTER|WITH|CASE|WHEN|THEN|ELSE|END|EXISTS|BY|ASC|DESC|INTO|VALUES|SET)\b/gi;
+    const kw=/\b(SELECT|FROM|WHERE|AND|OR|NOT|IN|IS|NULL|LIKE|BETWEEN|ORDER\s+BY|GROUP\s+BY|HAVING|LIMIT|OFFSET|DISTINCT|AS|JOIN|LEFT|RIGHT|INNER|OUTER|ON|UNION|ALL|INSERT|UPDATE|DELETE|CREATE|TABLE|DROP|ALTER|WITH|CASE|WHEN|THEN|ELSE|END|EXISTS|BY|ASC|DESC|INTO|VALUES|SET)\b/gi;
     const fn=/\b(COUNT|SUM|AVG|MAX|MIN|COALESCE|NULLIF|IFNULL|ROUND|FLOOR|CEIL|ABS|LENGTH|UPPER|LOWER|TRIM|SUBSTR|REPLACE|CAST|DATE|DATETIME|NOW|RANDOM|IIF|GROUP_CONCAT)\b/gi;
     return escapeHtml(raw)
       .replace(/(--[^\n]*)/g,m=>`<span class="cm">${m}</span>`)
-      .replace(/('([^'\\]|\\.)*')/g,m=>`<span class="st">${m}</span>`)
-      .replace(/\b(\d+(\.\d+)?)\b/g,m=>`<span class="nm">${m}</span>`)
+      .replace(/('(?:[^'\\]|\\.)*')/g,m=>`<span class="st">${m}</span>`)
+      .replace(/\b(\d+(?:\.\d+)?)\b/g,m=>`<span class="nm">${m}</span>`)
       .replace(kw,m=>`<span class="kw">${m}</span>`)
       .replace(fn,m=>`<span class="fn">${m}</span>`)
-      .replace(/([=<>!]+|[+\-*\/])/g,m=>`<span class="op">${m}</span>`);
+      .replace(/(?<![<\w])([=<>!]+|[+\-*\/])(?![\w>])/g,m=>`<span class="op">${m}</span>`);
   }
 
   function buildResultHtml(sql,results){
-    let html=`<div class="sql-block"><div class="sql-block-header"><span>Generated SQL</span><button class="copy-btn" onclick="copySql(this)">Copy</button></div><div class="sql-code">${highlightSQL(sql)}</div></div>`;
+    let html=`
+      <div class="sql-block">
+        <div class="sql-block-header">
+          <div class="sql-block-label">
+            <span class="sql-dot sql-dot-r"></span>
+            <span class="sql-dot sql-dot-y"></span>
+            <span class="sql-dot sql-dot-g"></span>
+            <span class="sql-lang">SQL</span>
+          </div>
+          <button class="copy-btn" onclick="copySql(this)">Copy</button>
+        </div>
+        <div class="sql-code">${highlightSQL(sql)}</div>
+      </div>`;
     if(!results||results.length===0) return html+`<div style="margin-top:9px;font-size:12px;color:var(--muted);">No rows returned.</div>`;
     const cols=Object.keys(results[0]);
     let tbl=`<div class="result-table-wrap"><table><thead><tr>${cols.map(c=>`<th>${escapeHtml(c)}</th>`).join('')}</tr></thead><tbody>`;