:root {
    --green: #00ff41;
    --green-dim: #00cc33;
    --green-glow: rgba(0, 255, 65, 0.15);
    --amber: #ffb000;
    --cyan: #00d4ff;
    --bg: #0a0a0a;
    --bg-terminal: #0d1117;
    --border: #1a2332;
    --text-dim: #4a6a4a;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --panel-bg: #161b22;
    --hover-bg: #1f2329;
    --error: #ff6b6b;
    --success: #51cf66;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    background: var(--bg);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    line-height: 1.5;
}

/* CRT scanline effect */
.scanline {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 999;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 0, 0, 0.08) 2px,
        rgba(0, 0, 0, 0.08) 4px
    );
}

.scanline::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(
        ellipse at center,
        transparent 60%,
        rgba(0, 0, 0, 0.4) 100%
    );
}

/* App layout */
.app {
    height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

/* Header */
.app-header {
    background: var(--panel-bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--green);
    text-shadow: 0 0 10px var(--green-glow);
}

.actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Buttons */
.btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 8px 16px;
    font-family: inherit;
    font-size: 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn:hover {
    background: var(--hover-bg);
    border-color: var(--green-dim);
}

.btn-primary {
    background: var(--green);
    border-color: var(--green);
    color: var(--bg);
}

.btn-primary:hover {
    background: var(--green-dim);
    border-color: var(--green-dim);
}

.btn-secondary {
    border-color: var(--cyan);
    color: var(--cyan);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
}

.btn-small {
    padding: 6px 12px;
    font-size: 11px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: var(--border);
    color: var(--text-dim);
}

.btn:disabled:hover {
    background: transparent;
    border-color: var(--border);
}

/* Dialect select */
.dialect-select {
    background: var(--panel-bg);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 8px 12px;
    font-family: inherit;
    font-size: 12px;
    border-radius: 4px;
    cursor: pointer;
    outline: none;
}

.dialect-select:hover,
.dialect-select:focus {
    border-color: var(--green-dim);
}

/* App body */
.app-body {
    flex: 1;
    display: flex;
    min-height: 0;
}

/* Schema sidebar */
.schema-sidebar {
    width: 280px;
    background: var(--bg-terminal);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 16px 20px 12px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h3 {
    color: var(--amber);
    font-size: 14px;
    font-weight: 500;
}

.tables-container {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
}

.no-tables {
    text-align: center;
    color: var(--text-dim);
    padding: 40px 0;
}

.no-tables small {
    font-size: 11px;
    opacity: 0.7;
}

.table-item {
    margin-bottom: 16px;
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.table-header {
    background: var(--panel-bg);
    padding: 10px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: background 0.2s;
}

.table-header:hover {
    background: var(--hover-bg);
}

.table-name {
    color: var(--cyan);
    font-weight: 500;
}

.table-row-count {
    color: var(--text-dim);
    font-size: 11px;
}

.table-columns {
    background: var(--bg-terminal);
}

.column-item {
    padding: 6px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    border-top: 1px solid rgba(26, 35, 50, 0.5);
}

.column-name {
    color: var(--text-primary);
}

.column-type {
    color: var(--amber);
    font-size: 10px;
    text-transform: uppercase;
}

/* Main content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Section styles */
.editor-section,
.results-section {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.editor-section {
    flex: 1;
    border-bottom: 1px solid var(--border);
}

.results-section {
    flex: 1;
}

.section-header {
    background: var(--panel-bg);
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.section-header h3 {
    color: var(--amber);
    font-size: 14px;
    font-weight: 500;
}

/* Editor */
.editor-container {
    flex: 1;
    position: relative;
}

.sql-editor {
    height: 100%;
}

.sql-editor .cm-editor {
    height: 100%;
    background: var(--bg-terminal);
    color: var(--text-primary);
}

.sql-editor .cm-focused {
    outline: none;
}

.sql-editor .cm-content {
    padding: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
}

.sql-editor .cm-line {
    color: var(--text-primary);
}

/* Results */
.results-container {
    flex: 1;
    background: var(--bg-terminal);
    overflow: auto;
}

.results-table {
    height: 100%;
    position: relative;
}

.no-results {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-dim);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-terminal);
    font-size: 12px;
}

.data-table th {
    background: var(--panel-bg);
    color: var(--amber);
    padding: 12px 16px;
    text-align: left;
    font-weight: 500;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table td {
    padding: 10px 16px;
    border-bottom: 1px solid rgba(26, 35, 50, 0.3);
    color: var(--text-primary);
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.data-table tr:hover {
    background: rgba(26, 35, 50, 0.3);
}

.data-table td.null {
    color: var(--text-dim);
    font-style: italic;
}

.data-table td.number {
    color: var(--cyan);
    text-align: right;
}

.data-table td.string {
    color: var(--text-primary);
}

/* Status bar */
.status-bar {
    background: var(--panel-bg);
    border-top: 1px solid var(--border);
    padding: 6px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.status-bar .error {
    color: var(--error);
}

.status-bar .success {
    color: var(--success);
}

/* Drop overlay */
.drop-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.drop-zone {
    text-align: center;
    padding: 40px;
    border: 2px dashed var(--cyan);
    border-radius: 12px;
    background: rgba(0, 212, 255, 0.05);
}

.drop-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.drop-zone h3 {
    color: var(--cyan);
    margin-bottom: 8px;
}

.drop-zone p {
    color: var(--text-secondary);
    font-size: 12px;
}

.hidden {
    display: none !important;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-dim);
}

/* Responsive design */
@media (max-width: 1024px) {
    .schema-sidebar {
        width: 240px;
    }
}

@media (max-width: 768px) {
    .app-header {
        padding: 10px 16px;
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .actions {
        order: 3;
        width: 100%;
        justify-content: space-between;
    }
    
    .schema-sidebar {
        width: 200px;
    }
    
    .section-header {
        padding: 10px 16px;
    }
    
    .sql-editor .cm-content {
        padding: 16px;
    }
}

@media (max-width: 640px) {
    .schema-sidebar {
        position: fixed;
        left: -280px;
        top: 0;
        height: 100%;
        z-index: 100;
        transition: left 0.3s;
        width: 280px;
    }
    
    .schema-sidebar.open {
        left: 0;
    }
    
    .main-content {
        width: 100%;
    }
    
    .actions {
        gap: 8px;
    }
    
    .btn {
        padding: 6px 12px;
        font-size: 11px;
    }
}

/* Animation for table expansion */
.table-columns {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.table-item.expanded .table-columns {
    max-height: 500px;
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner {
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 1px solid var(--text-dim);
    border-radius: 50%;
    border-top-color: var(--green);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}