:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1c1c1c;
    --bg-card: #1a1a1a;
    --card-bg: #1a1a1a;
    --border: #2a2a2a;
    --border-subtle: #222;
    --text: #f5f5f5;
    --text-secondary: #888;
    --text-muted: #555;
    --accent: #22c55e;
    --accent-glow: #22c55e40;
    --accent-hover: #16a34a;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --purple: #8b5cf6;
    --gradient: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    --paid: #22c55e;
    --voided: #ef4444;
    --draft: #f59e0b;
    --pending: #3b82f6;
}

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

body { 
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 
    background: var(--bg-primary); 
    color: var(--text); 
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* App Layout */
.app { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar { 
    width: 260px; 
    background: var(--bg-secondary); 
    border-right: 1px solid var(--border); 
    padding: 25px 0; 
    display: flex; 
    flex-direction: column; 
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 50;
}

.logo { 
    padding: 0 25px 30px; 
    font-size: 1.5rem; 
    font-weight: 800; 
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.nav-item { 
    display: block; 
    padding: 14px 25px; 
    color: var(--text-secondary); 
    transition: all 0.2s ease;
    font-size: 0.9rem;
    font-weight: 500;
    border-left: 3px solid transparent;
}

.nav-item:hover { 
    background: var(--bg-tertiary); 
    color: var(--text);
}

.nav-item.active { 
    background: linear-gradient(90deg, var(--accent-glow) 0%, transparent 100%);
    color: var(--accent);
    border-left-color: var(--accent);
}

/* Main Content */
.main { 
    flex: 1; 
    margin-left: 260px;
    display: flex; 
    flex-direction: column; 
    min-height: 100vh;
}

.header { 
    background: var(--bg-secondary); 
    border-bottom: 1px solid var(--border); 
    padding: 20px 35px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(10px);
}

.content { 
    flex: 1; 
    padding: 30px 35px; 
    overflow-y: auto;
}

/* Header */
.header-title { 
    font-size: 1.5rem; 
    font-weight: 700;
    letter-spacing: -0.3px;
}

.header-right { display: flex; align-items: center; gap: 15px; }

/* Buttons - Touch Friendly */
.btn { 
    display: inline-flex; 
    align-items: center; 
    justify-content: center; 
    padding: 14px 28px; 
    border: none; 
    border-radius: 10px; 
    font-size: 1rem; 
    font-weight: 600; 
    cursor: pointer; 
    min-height: 50px;
    touch-action: manipulation;
}

.btn-primary { 
    background: var(--gradient); 
    color: #000;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn-primary:hover { 
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-primary:active {
    transform: scale(0.98);
}

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

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

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

.btn-danger { 
    background: rgba(239, 68, 68, 0.2); 
    color: var(--danger);
}

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

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

.btn-sm { 
    padding: 12px 16px; 
    min-height: 40px;
    font-size: 0.9rem;
    border-radius: 8px;
}

.btn-block { width: 100%; }

/* Modal */
.modal { 
    display: none; 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%; 
    background: rgba(0,0,0,0.85); 
    z-index: 100;
    backdrop-filter: blur(5px);
}

.modal-content { 
    background: var(--bg-secondary); 
    margin: 5% auto; 
    padding: 28px; 
    border-radius: 16px; 
    max-width: 560px;
    border: 1px solid var(--border);
}

.modal-header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    margin-bottom: 24px;
}

.close { 
    font-size: 1.5rem; 
    cursor: pointer; 
    color: var(--text-secondary);
    transition: color 0.2s;
}

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

/* Alerts */
.alert { 
    padding: 14px 18px; 
    border-radius: 10px; 
    margin-bottom: 20px;
    font-size: 0.9rem;
}

.alert-success { 
    background: rgba(34, 197, 94, 0.15); 
    color: var(--accent);
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.alert-danger { 
    background: rgba(239, 68, 68, 0.15); 
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Empty State */
.empty { 
    text-align: center; 
    padding: 60px; 
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Stats */
.stats { 
    display: grid; 
    grid-template-columns: repeat(4, 1fr); 
    gap: 20px; 
    margin-bottom: 30px;
}

.stat-card { 
    background: var(--card-bg); 
    border: 1px solid var(--border); 
    border-radius: 12px; 
    padding: 20px;
}

.stat-label { 
    color: var(--text-secondary); 
    font-size: 0.85rem; 
    margin-bottom: 8px;
}

.stat-value { 
    font-size: 1.75rem; 
    font-weight: 700; 
    color: var(--text);
}

/* Cards */
.card { 
    background: var(--card-bg); 
    border: 1px solid var(--border); 
    border-radius: 12px; 
    padding: 24px;
    margin-bottom: 20px;
}

.card-title { 
    font-size: 1.1rem; 
    font-weight: 600; 
    margin-bottom: 16px;
    color: var(--text);
}

/* Table */
.table { 
    width: 100%; 
    border-collapse: collapse;
}

.table th, .table td { 
    padding: 14px 16px; 
    text-align: left; 
    border-bottom: 1px solid var(--border);
}

.table th { 
    color: var(--text-secondary); 
    font-weight: 500; 
    font-size: 0.85rem;
}

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

/* Grid */
.grid { 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 20px;
}

/* Badges */
.badge { 
    display: inline-block; 
    padding: 6px 12px; 
    border-radius: 20px; 
    font-size: 0.75rem; 
    font-weight: 600;
}

.badge-paid { 
    background: rgba(34, 197, 94, 0.15); 
    color: var(--paid);
}

.badge-voided { 
    background: rgba(239, 68, 68, 0.15); 
    color: var(--voided);
}

.badge-draft { 
    background: rgba(245, 158, 11, 0.15); 
    color: var(--draft);
}

.badge-pending { 
    background: rgba(59, 130, 246, 0.15); 
    color: var(--pending);
}

/* Forms */
label { 
    display: block; 
    margin-bottom: 8px; 
    color: var(--text-secondary); 
    font-size: 0.9rem;
}

input, select, textarea { 
    width: 100%; 
    padding: 14px 16px; 
    background: var(--bg-tertiary); 
    border: 1px solid var(--border); 
    border-radius: 10px; 
    color: var(--text); 
    font-size: 1rem;
    margin-bottom: 16px;
}

input:focus, select:focus, textarea:focus { 
    outline: none; 
    border-color: var(--accent);
}

/* Page Header */
.page-header { 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
    margin-bottom: 30px;
}

.page-header h1 { 
    font-size: 1.5rem; 
    font-weight: 700;
    letter-spacing: -0.3px;
}

/* Table Cards (F&B) */
.table-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); 
    gap: 16px;
}

.table-card, .table-card-large { 
    background: var(--bg-card); 
    border: 1px solid var(--border); 
    border-radius: 14px; 
    padding: 20px; 
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.table-card:hover, .table-card-large:hover { 
    border-color: var(--accent); 
    transform: translateY(-3px);
}

.table-card.available { border-color: var(--border); }
.table-card.occupied { border-color: var(--warning); }
.table-card.reserved { border-color: var(--info); }

.table-num { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.table-cap { color: var(--text-secondary); font-size: 0.8rem; margin-bottom: 8px; }
.table-stat { color: var(--text-secondary); font-size: 0.75rem; text-transform: uppercase; }
.table-qr { color: var(--text-muted); font-size: 0.7rem; margin-top: 10px; }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 30px; }

/* Responsive & Tablet */
@media (max-width: 1200px) {
    .pos-layout { flex-direction: column; height: auto; }
    .pos-products { flex: none; max-height: 50vh; overflow-y: auto; }
    .pos-cart { width: 100%; max-height: 50vh; overflow-y: auto; }
}

@media (max-width: 768px) {
    .sidebar { 
        position: fixed;
        bottom: 0;
        top: auto;
        left: 0;
        right: 0;
        width: 100%;
        height: 60px;
        flex-direction: row;
        padding: 0;
        z-index: 100;
        border-top: 1px solid var(--border);
    }
    .logo { display: none; }
    .main { margin-left: 0; margin-bottom: 60px; }
    .nav-item {
        flex: 1;
        padding: 10px 5px;
        font-size: 0.7rem;
        text-align: center;
    }
    .nav-item.active { border-left: none; border-top: 2px solid var(--accent); }
    
    .pos-layout { flex-direction: column; }
    .pos-products { grid-template-columns: repeat(3, 1fr); }
    .pos-cart { width: 100%; }
    
    .grid { grid-template-columns: repeat(3, 1fr); }
    .grid-card { padding: 15px 10px; }
    .grid-card h4 { font-size: 0.75rem; }
    .grid-card .price { font-size: 0.875rem; }
    
    .stats { grid-template-columns: 1fr 1fr; }
    .stat-card { padding: 15px; }
    .stat-value { font-size: 1.25rem; }

@media (max-width: 768px) {
    .sidebar { display: none; }
    .main { margin-left: 0; }
    .header { padding: 15px 20px; }
    .content { padding: 20px; }
    .stats { grid-template-columns: 1fr 1fr; }
    .grid { grid-template-columns: 1fr 1fr; }
    .pos-products { grid-template-columns: repeat(3, 1fr); }
}
    
    .btn { padding: 14px 20px; font-size: 1rem; }
    .btn-sm { padding: 10px 14px; }
    
    input, select, textarea { padding: 14px 16px; font-size: 1rem; }
    
    .header { padding: 15px 20px; }
    .header-title { font-size: 1.25rem; }
    .content { padding: 20px; }
    
    .table th, .table td { padding: 12px 8px; font-size: 0.875rem; }
    
    .stat-card { padding: 15px; }
    .stat-value { font-size: 1.5rem; }
    
    .modal-content { margin: 10% 10px; padding: 20px; }
}

@media (max-width: 480px) {
    .pos-products { grid-template-columns: repeat(2, 1fr); }
    .grid { grid-template-columns: repeat(2, 1fr); }
    .stats { grid-template-columns: 1fr 1fr; }
    
    h1, .header-title { font-size: 1.1rem; }
}

/* Tabs */
.tabs { display: flex; gap: 5px; margin-bottom: 20px; border-bottom: 1px solid var(--border); }
.tab { padding: 12px 20px; color: var(--text-secondary); text-decoration: none; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Form Grid */
.form-grid { display: grid; gap: 15px; }