:root {
    --sidebar-width: 260px;
    --primary-color: #0dfd21;
    --sidebar-bg: #1e293b;
    --sidebar-hover: #334155;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #f1f5f9;
    min-height: 100vh;
}

.wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: #e2e8f0;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transition: margin-left 0.3s ease;
}

.sidebar-header {
    padding: 1.25rem 1.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    border-bottom: 1px solid #334155;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-header i {
    font-size: 1.5rem;
}

.sidebar .nav {
    padding: 1rem 0;
    flex: 1;
}

.sidebar .nav-link {
    color: #94a3b8;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}

.sidebar .nav-link:hover {
    color: #fff;
    background: var(--sidebar-hover);
}

.sidebar .nav-link.active {
    color: #fff;
    background: var(--sidebar-hover);
    border-left-color: var(--primary-color);
}

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid #334155;
}

.admin-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #94a3b8;
}

/* Content */
.content {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

/* Stats cards */
.stat-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-card.primary .stat-icon { background: #dbeafe; color: #2563eb; }
.stat-card.success .stat-icon { background: #dcfce7; color: #16a34a; }
.stat-card.warning .stat-icon { background: #fef3c7; color: #d97706; }
.stat-card.danger .stat-icon { background: #fee2e2; color: #dc2626; }

/* Tables */
.table-card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.table-card .card-header {
    background: #fff;
    border-bottom: 1px solid #e2e8f0;
    padding: 1rem 1.25rem;
}

/* Login page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0d6efd 0%, #1e3a8a 100%);
}

.login-card {
    width: 100%;
    max-width: 420px;
    border: none;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.login-logo {
    font-size: 3rem;
    color: var(--primary-color);
}

/* Badges */
.badge-unpaid { background: #fee2e2; color: #991b1b; }
.badge-partial { background: #fef3c7; color: #92400e; }
.badge-paid { background: #dcfce7; color: #166534; }

/* Receipt */
.receipt-box {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 2rem;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
}

@media print {
    .no-print { display: none !important; }
    .content { margin-left: 0 !important; width: 100% !important; }
    .sidebar { display: none !important; }
    body { background: #fff; }
}

/* Mobile */
@media (max-width: 768px) {
    .sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
    }
    .sidebar.active {
        margin-left: 0;
    }
    .content {
        margin-left: 0;
        width: 100%;
    }
    .content.active {
        margin-left: var(--sidebar-width);
        width: calc(100% - var(--sidebar-width));
    }
}

/* Form enhancements */
.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

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


.search-box {
    max-width: 300px;
}