:root {
    --bg-body: #0f1115; --bg-surface: #1a1d24; --bg-surface-hover: #232730;
    --primary: #3b82f6; --primary-soft: rgba(59,130,246,0.1);
    --success: #10b981; --success-soft: rgba(16,185,129,0.1);
    --danger: #ef4444; --danger-soft: rgba(239,68,68,0.1);
    --warning: #f59e0b; --warning-soft: rgba(245,158,11,0.1);
    --text-primary: #f8fafc; --text-secondary: #94a3b8; --text-muted: #64748b;
    --border: #2e3340; --border-light: rgba(46,51,64,0.5);
    --sidebar-width: 250px; --header-height: 64px;
    --radius-md: 10px; --radius-lg: 16px; --transition: 0.3s;
}
[data-theme="light"] {
    --bg-body: #f8fafc; --bg-surface: #ffffff; --bg-surface-hover: #f1f5f9;
    --text-primary: #0f172a; --text-secondary: #475569; --text-muted: #94a3b8;
    --border: #e2e8f0; --border-light: rgba(226,232,240,0.5);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:'Inter',sans-serif; background:var(--bg-body); color:var(--text-primary); -webkit-font-smoothing:antialiased; transition:background var(--transition),color var(--transition); }

/* Utilities */
.text-primary{color:var(--primary)}.text-success{color:var(--success)}.text-danger{color:var(--danger)}.text-warning{color:var(--warning)}
.bg-primary-soft{background:var(--primary-soft)}.bg-success-soft{background:var(--success-soft)}.bg-danger-soft{background:var(--danger-soft)}.bg-warning-soft{background:var(--warning-soft)}
.mt-4{margin-top:2rem}.mono{font-family:'Courier New',monospace;font-size:.85rem}.font-medium{font-weight:600}

/* Layout */
.app-container{display:flex;height:100vh;overflow:hidden}

/* Sidebar */
.sidebar{width:var(--sidebar-width);background:var(--bg-surface);border-right:1px solid var(--border);display:flex;flex-direction:column;transition:background var(--transition)}
.sidebar-header{height:var(--header-height);display:flex;align-items:center;padding:0 1.5rem;border-bottom:1px solid var(--border-light)}
.logo{display:flex;align-items:center;gap:.75rem;font-weight:700;font-size:1.15rem}.logo-icon{color:var(--primary)}.logo .accent{color:var(--primary)}
.sidebar-nav{flex:1;padding:1.5rem 1rem;overflow-y:auto}
.nav-section{font-size:.7rem;text-transform:uppercase;color:var(--text-muted);font-weight:600;margin-bottom:.75rem;padding-left:.75rem;letter-spacing:.5px}
.nav-item{display:flex;align-items:center;gap:.75rem;padding:.65rem .75rem;color:var(--text-secondary);text-decoration:none;border-radius:var(--radius-md);font-size:.88rem;font-weight:500;margin-bottom:.15rem;transition:all .15s;cursor:pointer}
.nav-item:hover{background:var(--bg-surface-hover);color:var(--text-primary)}
.nav-item.active{background:var(--primary-soft);color:var(--primary);border-left:3px solid var(--primary)}
.nav-item svg{width:1.15rem;height:1.15rem}
.badge{margin-left:auto;background:var(--primary);color:#fff;padding:.1rem .45rem;border-radius:10px;font-size:.65rem}
.sidebar-footer{padding:1rem;border-top:1px solid var(--border-light)}

/* Main */
.main-content{flex:1;display:flex;flex-direction:column;overflow:hidden}

/* Header */
.top-header{height:var(--header-height);background:var(--bg-body);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 2rem;transition:background var(--transition);flex-shrink:0}
.header-left{display:flex;align-items:center}.header-right{display:flex;align-items:center;gap:.75rem}
.search-bar{display:flex;align-items:center;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:.45rem 1rem;width:280px;transition:border-color .2s}
.search-bar:focus-within{border-color:var(--primary)}
.search-icon{color:var(--text-muted);width:1rem;height:1rem;margin-right:.5rem}
.search-bar input{background:none;border:none;color:var(--text-primary);width:100%;outline:none;font-size:.88rem}
.icon-btn{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:.4rem;border-radius:8px;position:relative;transition:all .15s}
.icon-btn:hover{background:var(--bg-surface-hover);color:var(--text-primary)}
.icon-btn svg{width:1.15rem;height:1.15rem}
.notification-dot{position:absolute;top:4px;right:4px;width:6px;height:6px;background:var(--danger);border-radius:50%}
.user-profile{display:flex;align-items:center;gap:.6rem;padding-left:.75rem;border-left:1px solid var(--border)}
.avatar{width:32px;height:32px;border-radius:50%}.user-name{font-size:.85rem;font-weight:600}

/* Views */
.view{display:none;flex:1;overflow:hidden}
.view.active{display:flex;flex-direction:column;flex:1}

/* Dashboard Wrapper (scrollable content) */
.dashboard-wrapper{padding:1.75rem 2rem;overflow-y:auto;flex:1}
.page-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1.75rem;flex-wrap:wrap;gap:1rem}
.page-title{font-size:1.5rem;font-weight:700;margin-bottom:.15rem}
.page-subtitle{color:var(--text-secondary);font-size:.88rem}

/* Header Actions */
.header-actions{display:flex;align-items:center;gap:.75rem}
.date-range-toggle{display:flex;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.date-btn{padding:.45rem 1rem;font-size:.8rem;font-weight:500;background:none;border:none;color:var(--text-secondary);cursor:pointer;transition:all .15s;font-family:'Inter',sans-serif}
.date-btn.active{background:var(--primary);color:#fff}
.date-btn:hover:not(.active){color:var(--text-primary)}
.btn-action{display:flex;align-items:center;gap:.4rem;padding:.45rem 1rem;background:var(--primary);color:#fff;border:none;border-radius:var(--radius-md);font-size:.8rem;font-weight:600;cursor:pointer;transition:opacity .15s;font-family:'Inter',sans-serif}
.btn-action:hover{opacity:.85}.btn-action svg{width:.9rem;height:.9rem}

/* Metric Cards */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem;margin-bottom:1.75rem}
.metric-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.25rem;transition:background var(--transition),transform .2s}
.metric-card:hover{transform:translateY(-2px)}
.metric-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}
.metric-title{font-size:.8rem;color:var(--text-secondary);font-weight:500}
.metric-icon{width:36px;height:36px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center}
.metric-icon svg{width:1.1rem;height:1.1rem}
.metric-value{font-size:1.6rem;font-weight:700;margin-bottom:.5rem;transition:color .3s}
.metric-trend{display:flex;align-items:center;gap:.35rem;font-size:.78rem;font-weight:500}
.metric-trend svg{width:.85rem;height:.85rem}.metric-trend small{color:var(--text-muted);font-weight:400}
.trend-up{color:var(--success)}.trend-down{color:var(--danger)}.trend-neutral{color:var(--text-muted)}

/* Charts */
.charts-grid{display:grid;grid-template-columns:2fr 1fr;gap:1.25rem;margin-bottom:1.75rem}
.chart-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.25rem;transition:background var(--transition)}
.chart-wide{grid-column:span 1}
.card-header{margin-bottom:1.25rem;display:flex;justify-content:space-between;align-items:center}
.card-title{font-size:1rem;font-weight:600}
.chart-container{position:relative;height:280px;width:100%}
.doughnut-container{height:240px;display:flex;justify-content:center}

/* Tables */
.table-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.25rem;transition:background var(--transition);margin-bottom:1.75rem}
.table-header-row{display:flex;justify-content:space-between;align-items:center}
.table-count{font-size:.78rem;color:var(--text-muted)}
.table-responsive{overflow-x:auto}
.data-table{width:100%;border-collapse:collapse}
.data-table th{text-align:left;font-size:.75rem;text-transform:uppercase;color:var(--text-muted);font-weight:600;letter-spacing:.3px;padding:.75rem 1rem;border-bottom:1px solid var(--border)}
.data-table td{padding:.85rem 1rem;border-bottom:1px solid var(--border-light);font-size:.88rem;vertical-align:middle}
.data-table tbody tr{transition:background .15s}
.data-table tbody tr:hover{background:var(--bg-surface-hover)}
.data-table tbody tr.hidden{display:none}
.customer-cell{display:flex;align-items:center;gap:.75rem}
.avatar-sm{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:700;color:var(--text-primary);flex-shrink:0}
.status-badge{padding:.2rem .7rem;border-radius:20px;font-size:.72rem;font-weight:600;text-transform:capitalize}
.status-success{background:var(--success-soft);color:var(--success)}
.status-pending{background:var(--warning-soft);color:var(--warning)}
.status-failed{background:var(--danger-soft);color:var(--danger)}

/* Settings */
.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem}
.settings-card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;transition:background var(--transition)}
.settings-title{font-size:1rem;font-weight:600;margin-bottom:1.25rem;display:flex;align-items:center;gap:.5rem}
.settings-title svg{width:1.1rem;height:1.1rem;color:var(--primary)}
.settings-desc{color:var(--text-secondary);font-size:.88rem;margin-bottom:1rem}
.form-group{margin-bottom:1rem}
.form-group label{display:block;font-size:.78rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.3px;margin-bottom:.4rem}
.form-input{width:100%;padding:.6rem .85rem;background:var(--bg-body);border:1px solid var(--border);border-radius:var(--radius-md);color:var(--text-primary);font-size:.88rem;outline:none;transition:border-color .2s;font-family:'Inter',sans-serif}
.form-input:focus{border-color:var(--primary)}
.form-input:disabled{opacity:.5;cursor:not-allowed}

/* Toggle Switches */
.toggle-row{display:flex;justify-content:space-between;align-items:center;padding:.65rem 0;border-bottom:1px solid var(--border-light);font-size:.88rem}
.toggle-row:last-child{border-bottom:none}
.toggle{position:relative;width:44px;height:24px;display:inline-block}
.toggle input{opacity:0;width:0;height:0}
.toggle-slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background:var(--border);border-radius:24px;transition:.3s}
.toggle-slider::before{content:'';position:absolute;height:18px;width:18px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:.3s}
.toggle input:checked+.toggle-slider{background:var(--primary)}
.toggle input:checked+.toggle-slider::before{transform:translateX(20px)}

/* Theme Options */
.theme-options{display:flex;gap:1rem}
.theme-option{cursor:pointer;text-align:center;padding:.5rem;border-radius:var(--radius-md);border:2px solid transparent;transition:all .2s}
.theme-option.active{border-color:var(--primary)}
.theme-option span{display:block;font-size:.78rem;font-weight:500;margin-top:.5rem;color:var(--text-secondary)}
.theme-preview{width:80px;height:50px;border-radius:8px;border:1px solid var(--border)}
.dark-preview{background:#1a1d24}.light-preview{background:#f8fafc}

/* Modal */
.modal-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:rgba(0,0,0,.5);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity var(--transition);z-index:9999}
.modal-overlay.active{opacity:1;pointer-events:auto}
.modal-content{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);width:400px;padding:2rem;transform:translateY(20px) scale(.97);transition:transform var(--transition)}
.modal-overlay.active .modal-content{transform:translateY(0) scale(1)}
.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}
.modal-header h3{font-size:1.1rem;font-weight:600}
.modal-close{background:none;border:none;color:var(--text-muted);cursor:pointer}.modal-close:hover{color:var(--text-primary)}.modal-close svg{width:1.15rem;height:1.15rem}
.modal-desc{color:var(--text-secondary);margin-bottom:1.25rem;font-size:.88rem}
.modal-actions{display:flex;gap:.75rem}
.modal-action-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:.4rem;padding:.75rem;background:var(--bg-body);border:1px solid var(--border);color:var(--text-primary);border-radius:var(--radius-md);cursor:pointer;font-size:.85rem;font-weight:500;transition:all .15s;font-family:'Inter',sans-serif}
.modal-action-btn:hover{border-color:var(--primary);color:var(--primary)}.modal-action-btn svg{width:.9rem;height:.9rem}

/* Responsive */
@media(max-width:1100px){.metric-grid{grid-template-columns:repeat(2,1fr)}.settings-grid{grid-template-columns:1fr}}
@media(max-width:768px){.sidebar{display:none}.charts-grid{grid-template-columns:1fr}.page-header{flex-direction:column}.metric-grid{grid-template-columns:1fr}}