:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --radius: 12px;
}

[data-theme="dark"] {
    --background: #0f172a;
    --surface: #1e293b;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.5;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    animation: fadeIn 0.8s ease-out;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.brand h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--primary);
}

.brand p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: white;
    padding: 3rem 2rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
    text-align: center;
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.4);
}

.hero-section h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.05em;
}

.hero-section h2 span {
    color: #93c5fd;
}

.hero-section p {
    font-size: 1.125rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-4px);
}

.stat-card h3 {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card .value {
    font-size: 1.5rem;
    font-weight: 700;
}

.stat-card.income .value { color: var(--success); }
.stat-card.expense .value { color: var(--danger); }
.stat-card.commission .value { color: var(--primary); }

/* Main Content Area */
.main-wrapper {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
}

@media (max-width: 1024px) {
    .main-wrapper {
        grid-template-columns: 1fr;
    }
}

/* Form Styles */
.card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--background);
    color: var(--text-main);
    font-size: 0.875rem;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

button {
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    width: 100%;
}

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

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-muted);
    white-space: nowrap;
}

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

/* Table Styles */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

th {
    text-align: left;
    padding: 1rem;
    border-bottom: 2px solid var(--border);
    color: var(--text-muted);
    font-weight: 600;
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

tr:hover {
    background: rgba(0,0,0,0.02);
}

.badge {
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-income { background: rgba(16, 185, 129, 0.1); color: var(--success); }
.badge-expense { background: rgba(239, 68, 68, 0.1); color: var(--danger); }
.badge-pending { background: rgba(245, 158, 11, 0.1); color: var(--warning); }
.badge-approved { background: rgba(16, 185, 129, 0.1); color: var(--success); }

.pending-row {
    background-color: rgba(245, 158, 11, 0.03);
}

/* Receipt Print Styles */
@media print {
    body, * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    body {
        margin: 0;
        padding: 0;
    }
    .container { 
        display: none !important; 
    }
    #printableReceipt { 
        display: block !important; 
        position: static;
        width: 100%;
        max-width: 380px; /* Reduced layout width for POS/thermal receipt feel */
        margin: 0 auto;
        background: white;
        color: black;
        padding: 0;
        border: none;
    }
    #printableReceipt.report-mode {
        max-width: 100% !important;
        padding: 20px !important;
    }
    #printableReceipt * {
        visibility: visible;
    }
    .no-print {
        display: none !important;
    }
    @page {
        margin: 1cm;
        size: auto;
    }
}

#printableReceipt {
    display: none;
    padding: 2rem;
    border: 2px dashed #ccc;
    margin-top: 2rem;
}

/* Mobile App Optimization */
@media (max-width: 768px) {
    /* Sticky Bottom Navigation */
    .view-toggle {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: var(--surface);
        margin: 0 !important;
        padding: 0.75rem 0.5rem;
        box-shadow: 0 -4px 10px rgba(0,0,0,0.1);
        border-top: 1px solid var(--border);
        justify-content: space-around;
        gap: 0.5rem !important;
    }
    
    [data-theme="dark"] .view-toggle {
        box-shadow: 0 -4px 10px rgba(0,0,0,0.5);
    }
    
    .view-toggle button {
        flex: 1;
        padding: 0.5rem 0.25rem !important;
        font-size: 0.75rem !important;
        white-space: nowrap;
        border-radius: 8px;
    }
    
    .container {
        padding: 1rem 0.5rem 80px 0.5rem; /* bottom padding for sticky nav */
    }

    .hero-section {
        padding: 1.5rem 1rem; 
        margin-bottom: 1rem;
    }

    .hero-section h2 { font-size: 1.6rem; }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr !important;
        gap: 1rem;
    }
    
    header { 
        flex-direction: column; 
        gap: 1rem; 
        text-align: center; 
    }
    
    .brand { margin-bottom: 0.5rem; }
    
    .main-wrapper {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }

    /* Make touch targets larger on mobile inputs & prevent zoom */
    .form-group input, .form-group select {
        font-size: 16px !important; 
        padding: 0.8rem;
    }

    /* Smooth table scrolling */
    .table-container {
        border-radius: 8px;
        -webkit-overflow-scrolling: touch;
    }
    
    table { font-size: 0.8rem; }
    th, td { padding: 0.5rem; }
}

/* Button Group Styles */
.button-group {
    display: flex;
    gap: 0.5rem;
    background: var(--background);
    padding: 0.25rem;
    border-radius: 10px;
    border: 1px solid var(--border);
}

.button-group button {
    flex: 1;
    padding: 0.625rem;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 600;
}

.button-group button.active {
    background: var(--surface);
    color: var(--primary);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05); /* subtle shadow for active state */
}

.button-group.small button {
    padding: 0.4rem 0.25rem;
    font-size: 0.75rem;
}

.button-group.wrap {
    flex-wrap: wrap;
}

.button-group.wrap button {
    flex: 1 0 45%; /* Allow wrapping with approx 2 per row */
}

.button-group.vertical {
    flex-direction: column;
}

[data-theme="dark"] .button-group button.active {
    background: var(--primary);
    color: white;
}

/* Pagination Styles */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
    padding: 1rem;
}

.pagination button {
    padding: 0.5rem 1rem !important; /* using !important to override base button styles if conflict */
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-main);
    width: auto !important; 
    font-size: 0.8rem !important;
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-info {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
}