/* ============================================================
   Sivilima Billing - Modern UI Overlay (Bootstrap 4)
   ============================================================ */
:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #eef2ff;
    --primary-soft: #e0e7ff;
    --accent: #06b6d4;
    --success: #10b981;
    --success-soft: #d1fae5;
    --danger: #ef4444;
    --danger-soft: #fee2e2;
    --warning: #f59e0b;
    --warning-soft: #fef3c7;
    --info: #3b82f6;
    --info-soft: #dbeafe;
    --body-bg: #f1f5f9;
    --card-border: #e2e8f0;
    --text: #1e293b;
    --text-muted: #64748b;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, .07), 0 2px 4px -1px rgba(15, 23, 42, .06);
}

body {
    background-color: var(--body-bg);
    color: var(--text);
    font-family: 'Nunito', 'Segoe UI', sans-serif;
    -webkit-font-smoothing: antialiased;
}

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

/* ---------- Navbar ---------- */
.navbar.bg-white {
    background: #ffffff !important;
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 1px 3px rgba(15, 23, 42, .04);
}

.navbar .navbar-brand,
.navbar .navbar-light .navbar-brand {
    font-weight: 800;
    font-size: 1.4rem;
    background: linear-gradient(120deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.navbar .nav-link {
    font-weight: 600;
    color: var(--text-muted) !important;
    border-radius: 8px;
    padding: .45rem .8rem !important;
    transition: color .15s ease, background-color .15s ease;
}

.navbar .nav-link:hover {
    color: var(--primary) !important;
    background-color: var(--primary-light);
}

.navbar .dropdown-menu {
    border: 1px solid var(--card-border);
    border-radius: 10px;
    box-shadow: var(--shadow-md);
}

.navbar .dropdown-item {
    border-radius: 6px;
    font-weight: 500;
}

.navbar .dropdown-item:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

.navbar .nav-link.btn-create {
    background: linear-gradient(120deg, var(--primary), var(--accent));
    color: #ffffff !important;
    border-radius: 8px;
    padding: .45rem 1rem !important;
    font-weight: 700;
    margin-left: .5rem;
    box-shadow: 0 2px 6px rgba(79, 70, 229, .35);
    transition: transform .15s ease, box-shadow .15s ease;
}

.navbar .nav-link.btn-create:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, .45);
    background: linear-gradient(120deg, var(--primary-dark), var(--accent));
}

/* ---------- Cards ---------- */
.card {
    border: 1px solid var(--card-border);
    border-radius: 14px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.card-header {
    background: #ffffff;
    border-bottom: 1px solid var(--card-border);
    font-weight: 700;
    color: var(--text);
    padding: .9rem 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .5rem;
}

.card-header::before {
    content: '';
    width: 4px;
    height: 20px;
    border-radius: 4px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    margin-right: .6rem;
}

.card-body {
    padding: 1.25rem;
}

/* ---------- Tables ---------- */
.table-responsive {
    border-radius: 10px;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--card-border);
}

.table {
    margin-bottom: 0;
    width: 100%;
}

.table thead th {
    background: #f8fafc;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: .72rem;
    letter-spacing: .06em;
    font-weight: 800;
    border-bottom: 2px solid var(--card-border);
    padding: .8rem .9rem;
    white-space: nowrap;
}

.table tbody td {
    vertical-align: middle;
    padding: .75rem .9rem;
    font-size: .875rem;
    border-top: 1px solid #f1f5f9;
}

.table tbody tr {
    transition: background-color .15s ease;
}

.table tbody tr:hover {
    background-color: var(--primary-light);
}

.table.table-striped tbody tr:nth-of-type(odd) {
    background-color: #fbfcfe;
}

.table.table-striped tbody tr:nth-of-type(odd):hover {
    background-color: var(--primary-light);
}

/* ---------- Buttons ---------- */
.btn {
    border-radius: 8px;
    font-weight: 600;
    font-size: .8rem;
    padding: .35rem .8rem;
    transition: all .15s ease;
}

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

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

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

.btn-success:hover,
.btn-success:focus {
    background-color: #059669;
    border-color: #059669;
}

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

.btn-danger:hover,
.btn-danger:focus {
    background-color: #dc2626;
    border-color: #dc2626;
}

.btn-info {
    background-color: var(--info);
    border-color: var(--info);
    color: #fff;
}

.btn-info:hover,
.btn-info:focus {
    background-color: #2563eb;
    border-color: #2563eb;
    color: #fff;
}

.btn-warning {
    background-color: var(--warning);
    border-color: var(--warning);
    color: #fff;
}

.btn-warning:hover,
.btn-warning:focus {
    background-color: #d97706;
    border-color: #d97706;
    color: #fff;
}

/* ---------- Badges ---------- */
.badge {
    font-weight: 700;
    font-size: .72rem;
    padding: .35em .65em;
    border-radius: 6px;
}

.badge-soft-success {
    background-color: var(--success-soft);
    color: #065f46;
}

.badge-soft-danger {
    background-color: var(--danger-soft);
    color: #991b1b;
}

.badge-soft-warning {
    background-color: var(--warning-soft);
    color: #92400e;
}

.badge-soft-info {
    background-color: var(--info-soft);
    color: #1e40af;
}

.badge-soft-primary {
    background-color: var(--primary-soft);
    color: var(--primary-dark);
}

/* ---------- Alerts ---------- */
.alert {
    border-radius: 10px;
    border: none;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.alert-success {
    background-color: var(--success-soft);
    color: #065f46;
}

/* ---------- Forms ---------- */
.form-control,
.form-select {
    border-radius: 8px;
    border-color: #cbd5e1;
    padding: .45rem .75rem;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 .2rem rgba(79, 70, 229, .12);
}

/* ---------- Pagination ---------- */
.pagination {
    justify-content: center;
    margin-top: 1rem;
}

.pagination .page-link {
    border-radius: 8px;
    margin: 0 .15rem;
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-weight: 600;
}

.pagination .page-item.active .page-link {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* ---------- Dashboard stat cards ---------- */
.stat-card {
    border: 1px solid var(--card-border);
    border-radius: 14px;
    background: #ffffff;
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-md);
    transition: transform .15s ease, box-shadow .15s ease;
    height: 100%;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px -5px rgba(15, 23, 42, .12);
}

.stat-card .stat-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.stat-card .stat-label {
    color: var(--text-muted);
    font-size: .8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    margin: 0;
}

.stat-card .stat-value {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text);
    line-height: 1.2;
    margin: 0;
}

.stat-card a {
    text-decoration: none;
}

/* ---------- Misc ---------- */
.text-muted {
    color: var(--text-muted) !important;
}

/* ---------- Modals ---------- */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.55);
    z-index: 1050;
    padding: 1rem;
    overflow-y: auto;
}

.modal[style*="display: block"] {
    display: flex !important;
    align-items: center;
    justify-content: center;
}

.modal .modal-content {
    margin: auto;
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--card-border);
    border-radius: 14px;
    box-shadow: var(--shadow-md);
    background: #ffffff;
    padding: 24px;
    position: relative;
}

.modal .modal-content h2 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 1rem;
}

.modal .modal-content .close {
    position: absolute;
    top: 12px;
    right: 16px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-muted);
    opacity: 1;
    float: none;
}

.modal .modal-content .close:hover,
.modal .modal-content .close:focus {
    color: var(--danger);
    text-decoration: none;
    cursor: pointer;
}

/* ---------- Invoice item remove ---------- */
#items-table .item-remove {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--danger);
}

#items-table tr.row-to-remove {
    background-color: var(--danger-soft) !important;
    opacity: .7;
}

#items-table tr.row-to-remove input:not(.item-remove) {
    pointer-events: none;
    background-color: #fee2e2;
}