:root {
    --primary: #0096C7;
    --primary-hover: #4338CA;
    --secondary: #10B981;
    --danger: #EF4444;
    --danger-hover: #DC2626;
    --bg-color: #F3F4F6;
    --card-bg: #FFFFFF;
    --text-main: #1F2937;
    --text-muted: #6B7280;
    --border-color: #E5E7EB;
    --border-radius: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.2s ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-hover);
}

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

.sidebar {
    width: 260px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 24px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-nav {
    flex: 1;
    padding: 16px 0;
}

.sidebar-link {
    display: block;
    padding: 12px 24px;
    color: var(--text-muted);
    font-weight: 500;
}

.sidebar-link:hover, .sidebar-link.active {
    background-color: #EEF2FF;
    color: var(--primary);
    border-right: 3px solid var(--primary);
}

.main-content {
    flex: 1;
    padding: 32px;
    background-color: var(--bg-color);
    overflow-y: auto;
}

/* Auth Layout */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
}

.auth-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

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

/* Typography */
h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 24px;
}

h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 16px;
}

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

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
    background-color: #fff;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
	opacity:0.8;
    /*background-color: var(--primary-hover);*/
    color: white;
}

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

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

.btn-secondary {
    background-color: #E5E7EB;
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: #D1D5DB;
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
}

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

.table th, .table td {
    padding: 6px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background-color: #F9FAFB;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table tbody tr:hover {
    background-color: #F9FAFB;
}

/* Utilities */
.flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-4 { gap: 16px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }

/* Status Badges */
.badge {
    padding: 4px 8px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-draft { background: #E5E7EB; color: #374151; }
.badge-pending { background: #FEE2E2; color: #B91C1C; }
.badge-paid { background: #D1FAE5; color: #065F46; }
.badge-cancelled { background: #FEE2E2; color: #B91C1C; }

/* Dynamic Rows */
.dynamic-row {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    align-items: center;
}

.dynamic-row .form-group {
    margin-bottom: 0;
}

.grid {
    display: grid;
}
.grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* Tabs */
.tabs {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}
.tab-btn {
    background: none;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
}
.tab-btn:hover {
    color: var(--primary);
}
.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
}

/* Mobile Responsive */
.mobile-header {
    display: none;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.mobile-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary);
    cursor: pointer;
    margin-right: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.mobile-close {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    margin-left: auto;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 40;
}

@media (max-width: 768px) {
    .mobile-header {
        display: flex;
    }
    
    .sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        bottom: 0;
        z-index: 50;
        transition: left 0.3s ease;
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.open {
        left: 0;
    }

    .sidebar-header {
        display: flex;
        align-items: center;
    }
    
    .mobile-close {
        display: block;
    }
    
    .sidebar-overlay.open {
        display: block;
    }
    
    .main-content {
        padding: 16px;
    }
    
    .grid-cols-2 {
        grid-template-columns: 1fr;
    }
    
    .dynamic-row {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .dynamic-row .form-group,
    .dynamic-row .form-control {
        width: 100%;
    }
    
    .dynamic-row .btn {
        width: 100%;
        margin-top: 8px;
    }
}