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

:root {
    --bg: #0f0f14;
    --surface: #1a1a24;
    --surface-2: #22222f;
    --border: #2a2a3a;
    --border-hover: #3a3a4f;
    --text: #e8e8f0;
    --text-dim: #8888a0;
    --accent: #6c5ce7;
    --accent-hover: #7c6cf7;
    --accent-glow: rgba(108, 92, 231, 0.15);
    --danger: #ff6b6b;
    --danger-hover: #ff5252;
    --success: #51cf66;
    --warning: #ffd43b;
    --info: #74c0fc;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --topbar-h: 48px;
    --sidebar-w: 200px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', sans-serif;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow: hidden;
}

/* ===== Login ===== */
.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: radial-gradient(ellipse at center, #1a1a2e 0%, #0f0f14 70%);
}

.login-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 48px 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
    box-shadow: var(--shadow);
}

.login-logo {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -1px;
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.login-subtitle {
    color: var(--text-dim);
    font-size: 14px;
    margin-bottom: 32px;
}

.login-form { text-align: left; }

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

.input-group label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-dim);
    margin-bottom: 6px;
}

.input-group input[type="password"],
.input-group input[type="text"] {
    width: 100%;
    padding: 11px 14px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

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

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-dim);
    cursor: pointer;
}

.checkbox-label input { width: auto; }

.btn-login {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 8px;
}

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

.login-tip {
    margin-top: 16px;
    font-size: 11px;
    color: var(--text-dim);
    text-align: center;
}

/* ===== Desktop Layout ===== */
.desktop {
    display: grid;
    grid-template-rows: var(--topbar-h) 1fr;
    grid-template-columns: var(--sidebar-w) 1fr;
    grid-template-areas:
        "topbar topbar"
        "sidebar main";
    height: 100vh;
}

/* ===== Top Bar ===== */
.topbar {
    grid-area: topbar;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 100;
}

.topbar-left { display: flex; align-items: center; }

.topbar-logo {
    font-size: 16px;
    font-weight: 800;
    background: linear-gradient(135deg, #6c5ce7, #a29bfe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.topbar-center {
    font-size: 13px;
    color: var(--text-dim);
}

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

.topbar-user {
    font-size: 12px;
    color: var(--text-dim);
}

.topbar-btn {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.topbar-btn:hover {
    border-color: var(--danger);
    color: var(--danger);
}

/* ===== Sidebar ===== */
.sidebar {
    grid-area: sidebar;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 16px 10px;
    overflow-y: auto;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: none;
    background: none;
    border-radius: var(--radius-sm);
    color: var(--text-dim);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s;
    text-align: left;
    width: 100%;
}

.nav-item:hover {
    background: var(--surface-2);
    color: var(--text);
}

.nav-item.active {
    background: var(--accent-glow);
    color: var(--accent);
    font-weight: 500;
}

.nav-icon { font-size: 16px; }

/* ===== Main Content ===== */
.main-content {
    grid-area: main;
    padding: 24px;
    overflow-y: auto;
    overflow-x: hidden;
}

.section { display: none; }
.section.active { display: block; }

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.header-actions {
    display: flex;
    gap: 8px;
}

/* ===== Cards ===== */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
}

.card-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    transition: border-color 0.2s;
}

.stat-card:hover { border-color: var(--border-hover); }

.stat-icon { font-size: 28px; }

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
}

.stat-label {
    font-size: 12px;
    color: var(--text-dim);
}

.account-info {
    font-size: 13px;
    color: var(--text-dim);
    line-height: 1.8;
}

/* ===== Buttons ===== */
.btn {
    padding: 7px 14px;
    border: 1px solid var(--border);
    background: var(--surface-2);
    color: var(--text);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
}

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

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

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

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

.btn-danger:hover {
    background: var(--danger);
    color: white;
}

.btn-sm { padding: 5px 10px; font-size: 11px; }

/* ===== Table ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th,
.data-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table tr:hover td {
    background: var(--surface-2);
}

.data-table .actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* ===== Badge ===== */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 500;
}

.badge-success { background: rgba(81,207,102,0.15); color: var(--success); }
.badge-warning { background: rgba(255,212,59,0.15); color: var(--warning); }
.badge-danger { background: rgba(255,107,107,0.15); color: var(--danger); }
.badge-info { background: rgba(116,192,252,0.15); color: var(--info); }

/* ===== Placeholder ===== */
.placeholder {
    text-align: center;
    padding: 40px;
    color: var(--text-dim);
    font-size: 13px;
}

/* ===== Code Block ===== */
.code-block {
    background: #0d0d12;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 12px;
    color: #a0a0c0;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 400px;
    overflow-y: auto;
    line-height: 1.6;
}

/* ===== SQL Editor ===== */
.sql-editor {
    margin-bottom: 12px;
}

.sql-editor textarea {
    width: 100%;
    padding: 12px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 13px;
    resize: vertical;
    outline: none;
    margin-bottom: 8px;
}

.sql-editor textarea:focus { border-color: var(--accent); }

/* ===== Modal ===== */
.modal-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 500;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}

.modal-backdrop.show { display: flex; }

.modal {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    width: 90%;
    max-width: 480px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 15px; font-weight: 600; }

.modal-close {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 20px;
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover { color: var(--text); }

.modal-body { padding: 20px 22px; }

.modal-body .input-group { margin-bottom: 14px; }

.modal-body textarea {
    width: 100%;
    padding: 10px 12px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 13px;
    resize: vertical;
    outline: none;
}

.modal-body textarea:focus { border-color: var(--accent); }

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 14px 22px;
    border-top: 1px solid var(--border);
}

/* ===== Toast ===== */
.toast-wrap {
    position: fixed;
    top: 60px;
    right: 20px;
    z-index: 600;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: white;
    animation: toastIn 0.3s ease;
    max-width: 320px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.toast-success { background: #2d6a4f; }
.toast-error { background: #9b2c2c; }
.toast-info { background: #2d3a8c; }

@keyframes toastIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ===== Spinner ===== */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ===== 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(--border-hover); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    :root { --sidebar-w: 60px; }
    .nav-label { display: none; }
    .nav-item { justify-content: center; padding: 10px; }
    .main-content { padding: 16px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    :root { --sidebar-w: 0px; }
    .sidebar { display: none; }
    .desktop {
        grid-template-columns: 1fr;
        grid-template-areas:
            "topbar"
            "main";
    }
}