:root {
  --primary: #336791; --primary-hover: #264F73; --secondary: #599BD5;
  --accent: #10B981; --success: #10B981; --error: #EF4444;
  --bg: #0A0E14; --bg-elevated: #0D1420; --bg-card: #111B2A;
  --bg-input: #0B1018; --text: #D5DEE8; --text-muted: #7898B5; --text-dim: #3E5670;
  --border: #1A2A3E; --border-hover: #2A4060; --radius: 12px; --radius-sm: 8px;
  --font: 'Inter', system-ui, sans-serif; --mono: 'JetBrains Mono', monospace; --transition: 200ms ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;overflow:hidden}
.app{display:flex;flex-direction:column;height:100vh}

.header{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;background:var(--bg-elevated);border-bottom:1px solid var(--border);gap:10px;flex-shrink:0;flex-wrap:wrap}
.header-left{display:flex;align-items:center;gap:10px}
.logo{font-size:1.2rem}
.header-title{font-size:1rem;font-weight:700;color:var(--secondary)}
.badge{font-size:.6rem;padding:2px 8px;border-radius:10px;background:rgba(16,185,129,.15);color:var(--accent);font-weight:600}
.header-right{display:flex;gap:6px;align-items:center;flex-wrap:wrap}

.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;font-size:.78rem;font-weight:500;font-family:var(--font);border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);white-space:nowrap}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-hover));color:#fff;box-shadow:0 2px 8px rgba(51,103,145,.3)}
.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 16px rgba(51,103,145,.4)}
.btn-ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}
.btn-ghost:hover:not(:disabled){background:var(--bg-card);color:var(--text);border-color:var(--border-hover)}
.btn-sm{padding:5px 10px;font-size:.72rem}
.btn-xs{padding:3px 8px;font-size:.65rem}
.select-sm{padding:4px 8px;font-size:.7rem;font-family:var(--font);background:var(--bg-input);border:1px solid var(--border);border-radius:6px;color:var(--text);outline:none;cursor:pointer}

.main{display:grid;grid-template-columns:180px 1fr;flex:1;overflow:hidden}
.sidebar{background:var(--bg-elevated);border-right:1px solid var(--border);overflow-y:auto;padding:10px;display:flex;flex-direction:column;gap:8px}
.sidebar-title{font-size:.7rem;font-weight:600;color:var(--text-dim);text-transform:uppercase;letter-spacing:1px}
.schema-tree{font-size:.7rem;font-family:var(--mono);display:flex;flex-direction:column;gap:2px}
.schema-table{padding:4px 8px;border-radius:4px;cursor:pointer;color:var(--secondary)}
.schema-table:hover{background:rgba(89,155,213,.08)}
.schema-col{padding-left:16px;font-size:.65rem;color:var(--text-dim)}
.history-list{display:flex;flex-direction:column;gap:2px;font-size:.65rem}
.history-item{padding:4px 8px;border-radius:4px;cursor:pointer;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:var(--mono)}
.history-item:hover{background:rgba(89,155,213,.08);color:var(--text)}
.dim{font-size:.68rem;color:var(--text-dim);font-style:italic}

.editor-area{display:flex;flex-direction:column;overflow:hidden}
.editor-wrap{flex:1;min-height:120px;display:flex}
.code-editor{flex:1;padding:14px;font-family:var(--mono);font-size:.82rem;line-height:1.6;background:var(--bg-input);border:none;color:var(--accent);resize:none;outline:none;tab-size:2;border-bottom:1px solid var(--border)}
.code-editor:focus{background:rgba(11,16,24,.9)}
.code-editor::placeholder{color:var(--text-dim)}

.results-area{flex:1;display:flex;flex-direction:column;overflow:hidden;min-height:100px}
.results-header{display:flex;align-items:center;justify-content:space-between;padding:6px 14px;background:var(--bg-elevated);border-bottom:1px solid var(--border)}
.results-title{font-size:.72rem;font-weight:600}
.exec-time{font-size:.65rem;color:var(--accent);font-family:var(--mono)}
.results-table-wrap{flex:1;overflow:auto;padding:8px}
table{width:100%;border-collapse:collapse;font-size:.72rem;font-family:var(--mono)}
th{padding:6px 10px;text-align:left;background:var(--bg-card);color:var(--secondary);font-weight:600;position:sticky;top:0;border-bottom:1px solid var(--border)}
td{padding:5px 10px;border-bottom:1px solid rgba(26,42,62,.5);color:var(--text-muted)}
tr:hover td{background:rgba(89,155,213,.04)}
.error-msg{color:var(--error);font-size:.78rem;padding:10px}

::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
@media(max-width:768px){.main{grid-template-columns:1fr}.sidebar{display:none}.editor-area{min-height:0}}