/* ==========================================================================
   MySQL Studio & Database Viewer CSS Design System
   ========================================================================== */

:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --bg-card: rgba(31, 41, 55, 0.7);
    --bg-glass: rgba(17, 24, 39, 0.75);

    --border-color: #374151;
    --border-highlight: #4b5563;

    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --accent-primary: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.25);

    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;

    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --header-height: 60px;
    --sidebar-width: 280px;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.9);

    --border-color: #e2e8f0;
    --border-highlight: #cbd5e1;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --accent-primary: #4f46e5;
    --accent-hover: #4338ca;
    --accent-glow: rgba(79, 70, 229, 0.15);
}

[data-theme="light"] .brand-title {
    background: linear-gradient(135deg, #0f172a 0%, #4f46e5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

[data-theme="light"] .sql-textarea,
[data-theme="light"] .code-block {
    background: #1e293b;
    color: #f1f5f9;
}

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

body {
    font-family: var(--font-ui);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

/* --------------------------------------------------------------------------
   App Container & Header
   -------------------------------------------------------------------------- */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

.app-header {
    height: var(--header-height);
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 100;
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-icon {
    font-size: 24px;
    color: var(--accent-primary);
}

.brand-title {
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-badge {
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 12px;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.connection-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;

}
.status-dot.online {
    background: var(--success-color);
    box-shadow: 0 0 8px var(--success-color);
}
.status-dot.offline {
    background: var(--danger-color);
}

.db-selector-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0 12px;
    transition: all 0.2s;
}

.db-selector-wrapper:hover, .db-selector-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.db-selector-wrapper i {
    color: var(--text-muted);
    margin-right: 8px;
}

.db-select {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 24px 8px 0;
    outline: none;
    cursor: pointer;
    appearance: none;
}

/* --------------------------------------------------------------------------
   Workspace & Sidebar
   -------------------------------------------------------------------------- */
.workspace {
    display: flex;
    flex: 1;
    height: calc(100vh - var(--header-height));
    overflow: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-title {
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-search {
    padding: 10px 16px;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-search i {
    position: absolute;
    left: 26px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.sidebar-search input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 12px 6px 32px;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
}

.sidebar-search input:focus {
    border-color: var(--accent-primary);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.sidebar-loading {
    padding: 24px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

.tree-db-item {
    margin-bottom: 4px;
}

.tree-db-title {
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 13.5px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background 0.15s, color 0.15s;
}

.tree-db-title:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

.tree-db-title.active {
    color: #a5b4fc;
    background: rgba(99, 102, 241, 0.1);
}

.tree-tables-list {
    padding-left: 28px;
    display: none;
}

.tree-db-item.expanded .tree-tables-list {
    display: block;
}

.tree-table-item {
    padding: 6px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    margin: 2px 8px;
    transition: all 0.15s;
}

.tree-table-item:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.tree-table-item.active {
    color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.15);
    font-weight: 600;
}

/* --------------------------------------------------------------------------
   Content Panel & Tabs
   -------------------------------------------------------------------------- */
.content-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    overflow: hidden;
}

.nav-tabs {
    display: flex;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 16px;
    gap: 4px;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-ui);
    font-size: 13.5px;
    font-weight: 500;
    padding: 12px 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.05);
}

.tab-content-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.tab-pane {
    display: none;
    height: 100%;
    flex-direction: column;
}

.tab-pane.active {
    display: flex;
}

.pane-header {
    margin-bottom: 20px;
}

.pane-header h2 {
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pane-subtitle {
    font-size: 13px;
    color: var(--text-muted);
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* --------------------------------------------------------------------------
   Cards Grid (Databases Overview)
   -------------------------------------------------------------------------- */
.db-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.db-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.db-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-primary);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3), 0 0 0 1px var(--accent-primary);
}

.db-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.db-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.db-card-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    font-size: 13px;
    color: var(--text-secondary);
}

.db-card-stat strong {
    color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Tables & Data Grid
   -------------------------------------------------------------------------- */
.table-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: auto;
    max-height: 100%;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    text-align: left;
}

.data-table th {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-weight: 600;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
    white-space: nowrap;
}

.data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    white-space: nowrap;
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: var(--font-mono);
}

.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.03);
}

.data-table.interactive tbody tr {
    cursor: pointer;
}

.empty-cell {
    text-align: center;
    padding: 40px !important;
    color: var(--text-muted);
    font-family: var(--font-ui) !important;
}

/* Badges for Columns & Keys */
.badge {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-pk { background: rgba(239, 68, 68, 0.2); color: #fca5a5; border: 1px solid rgba(239, 68, 68, 0.4); }
.badge-uni { background: rgba(245, 158, 11, 0.2); color: #fde047; border: 1px solid rgba(245, 158, 11, 0.4); }
.badge-mul { background: rgba(59, 130, 246, 0.2); color: #93c5fd; border: 1px solid rgba(59, 130, 246, 0.4); }
.badge-null { color: var(--text-muted); font-style: italic; }

/* --------------------------------------------------------------------------
   Data Browser & Pagination
   -------------------------------------------------------------------------- */
.data-view-wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 12px;
    overflow: hidden;
}

.pagination-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 10px 16px;
    font-size: 13px;
}

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

.btn-page {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.btn-page:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-size-select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    outline: none;
}

/* --------------------------------------------------------------------------
   SQL Editor Pane
   -------------------------------------------------------------------------- */
.query-editor-wrapper {
    margin-bottom: 16px;
}

.sql-textarea {
    width: 100%;
    background: #090d16;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    color: #e2e8f0;
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    outline: none;
    transition: border 0.2s;
}

.sql-textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.query-meta-bar {
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.query-results-wrapper {
    flex: 1;
    overflow: hidden;
}

/* --------------------------------------------------------------------------
   Buttons & Controls
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-ui);
    font-size: 13.5px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12.5px;
}

.btn-primary {
    background: var(--accent-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

.btn-success {
    background: var(--success-color);
    color: #ffffff;
}

.btn-success:hover {
    background: #059669;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 16px;
    padding: 4px;
}

.btn-icon:hover {
    color: var(--text-primary);
}

.action-bar {
    display: flex;
    align-items: center;
    gap: 10px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 10px;
    color: var(--text-muted);
}

.search-box input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 6px 12px 6px 30px;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
}

/* --------------------------------------------------------------------------
   Schema Inspector & DDL
   -------------------------------------------------------------------------- */
.schema-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.schema-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
}

.schema-card.full-width {
    grid-column: 1 / -1;
}

.schema-card h3 {
    font-size: 14px;
    margin-bottom: 12px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.code-block {
    background: #090d16;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: #a5b4fc;
    overflow-x: auto;
    white-space: pre-wrap;
}

/* --------------------------------------------------------------------------
   Modals & Toasts
   -------------------------------------------------------------------------- */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    width: 450px;
    max-width: 90%;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.modal-lg {
    width: 750px;
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
}

.modal-body {
    padding: 20px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

.form-group input:focus {
    border-color: var(--accent-primary);
}

.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--info-color);
    color: var(--text-primary);
    padding: 12px 18px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.3s ease;
}

.toast.success { border-left-color: var(--success-color); }
.toast.error { border-left-color: var(--danger-color); }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}

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