:root {
  --bg: #0C0A09;
  --bg-secondary: #1c1917;
  --bg-card: #1c1917;
  --bg-input: #0c0a09;
  --text: #e7e5e4;
  --text-secondary: #a8a29e;
  --text-muted: #78716c;
  --primary: #06B6D4;
  --primary-light: #22d3ee;
  --accent: #A78BFA;
  --accent-light: #c4b5fd;
  --border: rgba(6,182,212,0.1);
  --border-strong: rgba(6,182,212,0.25);
  --shadow: 0 4px 14px rgba(0,0,0,0.5);
  --radius: 8px;
  --font: 'Inter',-apple-system,sans-serif;
  --mono: 'IBM Plex Mono',monospace;
  --transition: 0.2s ease;
  --glass: rgba(28,25,23,0.85);
}

[data-theme="light"] {
  --bg: #fafaf9;
  --bg-secondary: #f5f5f4;
  --bg-card: #ffffff;
  --bg-input: #ffffff;
  --text: #1c1917;
  --text-secondary: #57534e;
  --text-muted: #78716c;
  --border: rgba(6,182,212,0.15);
  --border-strong: rgba(6,182,212,0.3);
  --shadow: 0 4px 14px rgba(0,0,0,0.06);
  --glass: rgba(255,255,255,0.85);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;overflow:hidden;transition:background var(--transition),color var(--transition)}

.header{position:fixed;top:0;left:0;right:0;z-index:100;background:var(--glass);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);height:50px}
.header-inner{padding:0 16px;height:100%;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:8px}
.logo-icon{font-size:1.2rem}
.logo h1{font-size:1.05rem;font-weight:700;color:var(--primary)}
.header-actions{display:flex;gap:6px}

.btn{display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border:none;border-radius:var(--radius);font-family:var(--font);font-size:0.78rem;font-weight:500;cursor:pointer;transition:all var(--transition);white-space:nowrap}
.btn-icon{width:14px;height:14px}
.btn-primary{background:linear-gradient(135deg,var(--primary),#0891b2);color:#fff}
.btn-primary:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--bg-card);border-color:var(--border-strong)}
.btn-sm{padding:4px 10px;font-size:0.75rem}
.icon-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border:1px solid var(--border);border-radius:var(--radius);background:transparent;color:var(--text-secondary);cursor:pointer;transition:all var(--transition)}
.icon-btn:hover{background:var(--bg-card);color:var(--primary)}
.icon-btn svg{width:16px;height:16px}

[data-theme="dark"] .sun{display:block}[data-theme="dark"] .moon{display:none}
[data-theme="light"] .sun{display:none}[data-theme="light"] .moon{display:block}

.app-layout{display:flex;height:calc(100vh - 50px);margin-top:50px}

.sidebar{width:240px;background:var(--bg-secondary);border-right:1px solid var(--border);overflow-y:auto;flex-shrink:0;padding:12px}
.sidebar-section{margin-bottom:16px}
.sidebar-title{font-size:0.68rem;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin-bottom:8px}

.table-list,.history-list{list-style:none}
.table-list li,.history-list li{padding:6px 10px;border-radius:var(--radius);font-family:var(--mono);font-size:0.78rem;color:var(--text-secondary);cursor:pointer;transition:all var(--transition);display:flex;justify-content:space-between;align-items:center}
.table-list li:hover,.history-list li:hover{background:var(--bg-card);color:var(--primary)}
.table-list li.active{background:rgba(6,182,212,0.1);color:var(--primary)}
.row-count{font-size:0.65rem;color:var(--text-muted);background:rgba(6,182,212,0.08);padding:1px 6px;border-radius:99px}
.empty-msg{color:var(--text-muted);font-size:0.78rem;font-style:italic;cursor:default !important}
.history-list li{font-size:0.72rem;word-break:break-all}

.main-content{flex:1;overflow-y:auto;padding:16px;position:relative}

/* Drop Zone */
.drop-zone{border:2px dashed var(--border-strong);border-radius:var(--radius);padding:60px 20px;text-align:center;transition:all var(--transition);cursor:pointer}
.drop-zone.drag-over{border-color:var(--primary);background:rgba(6,182,212,0.05)}
.drop-icon{font-size:3rem;margin-bottom:12px;animation:float 3s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.drop-zone h2{font-size:1.2rem;font-weight:700;color:var(--primary);margin-bottom:6px}
.drop-zone p{font-size:0.85rem;color:var(--text-muted)}
.drop-zone code{background:rgba(6,182,212,0.1);padding:1px 5px;border-radius:4px;color:var(--primary);font-family:var(--mono);font-size:0.8rem}

/* Editor */
.editor-section{margin-bottom:14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.editor-header{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;border-bottom:1px solid var(--border)}
.editor-header h3{font-size:0.78rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em}
#query-editor{width:100%;padding:12px;border:none;background:var(--bg-input);color:var(--text);font-family:var(--mono);font-size:0.82rem;resize:vertical;min-height:80px;line-height:1.5}
#query-editor:focus{outline:none;box-shadow:inset 0 0 0 1px var(--primary)}

/* Schema */
.schema-panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:14px;margin-bottom:14px}
.schema-panel h3{font-size:0.85rem;font-weight:600;margin-bottom:10px}
.schema-grid{display:grid;gap:6px}
.schema-row{display:grid;grid-template-columns:2fr 1.5fr 1fr 1fr;gap:8px;padding:6px 10px;border-radius:4px;font-family:var(--mono);font-size:0.75rem}
.schema-row.header{font-weight:600;color:var(--text-muted);border-bottom:1px solid var(--border);text-transform:uppercase;font-size:0.68rem;letter-spacing:.04em}
.schema-row:not(.header){color:var(--text-secondary)}
.schema-row:not(.header):hover{background:rgba(6,182,212,0.05)}
.col-pk{color:var(--accent)}
.col-nn{color:var(--primary)}

/* Results */
.results-section{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.results-header{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;border-bottom:1px solid var(--border)}
.results-header h3{font-size:0.82rem;font-weight:600}
.results-meta{display:flex;gap:12px;font-size:0.72rem;color:var(--text-muted);font-family:var(--mono)}
.results-table-wrap{overflow-x:auto;max-height:420px;overflow-y:auto}
.results-table{width:100%;border-collapse:collapse;font-family:var(--mono);font-size:0.78rem}
.results-table th{padding:8px 12px;text-align:left;font-weight:600;color:var(--text-muted);background:var(--bg-secondary);position:sticky;top:0;z-index:1;border-bottom:1px solid var(--border);cursor:pointer;white-space:nowrap}
.results-table th:hover{color:var(--primary)}
.results-table td{padding:6px 12px;border-bottom:1px solid var(--border);color:var(--text-secondary);white-space:nowrap;max-width:300px;overflow:hidden;text-overflow:ellipsis}
.results-table tr:hover td{background:rgba(6,182,212,0.03)}
.null-val{color:var(--text-muted);font-style:italic}

.pagination{display:flex;align-items:center;justify-content:center;gap:12px;padding:10px;border-top:1px solid var(--border)}
.page-info{font-size:0.75rem;color:var(--text-muted);font-family:var(--mono)}

.toast-container{position:fixed;bottom:16px;right:16px;z-index:2000;display:flex;flex-direction:column;gap:6px}
.toast{padding:10px 16px;background:var(--bg-card);border:1px solid var(--border-strong);border-radius:var(--radius);box-shadow:var(--shadow);font-size:0.82rem;color:var(--text);animation:toastIn .3s ease,toastOut .3s ease 2.7s forwards;max-width:280px}
@keyframes toastIn{from{opacity:0;transform:translateX(16px)}to{opacity:1;transform:translateX(0)}}
@keyframes toastOut{from{opacity:1}to{opacity:0;transform:translateX(16px)}}

@media(max-width:768px){
  .sidebar{display:none}
  .app-layout{flex-direction:column}
  .schema-row{grid-template-columns:1fr 1fr}
}