@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --inv-primary: #2563eb;
    --inv-primary-dark: #1d4ed8;
    --inv-primary-light: #3b82f6;
    --inv-primary-soft: #eff4ff;
    --inv-primary-rgb: 37, 99, 235;
    --inv-sidebar-bg: #16213d;
    --inv-sidebar-bg-active: #1f2c52;
    --inv-sidebar-fg: #b8c1d9;
    --inv-sidebar-fg-active: #ffffff;
    --inv-sidebar-heading: #5b6a8f;
    --inv-bg: #f5f7fb;
    --inv-border: #e5e9f2;
    --inv-text: #1a2342;
    --inv-text-muted: #8094ae;
    --inv-radius: 12px;
    --inv-radius-lg: 16px;
    --inv-shadow-sm: 0 1px 2px rgba(20, 30, 60, .06);
    --inv-shadow-md: 0 4px 14px rgba(20, 30, 60, .08);
    --inv-shadow-lg: 0 12px 32px rgba(20, 30, 60, .12);
    --inv-glow: 0 6px 16px rgba(var(--inv-primary-rgb), .28);
    --inv-ease: cubic-bezier(.4, 0, .2, 1);
    --inv-font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@keyframes inv-fade-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: none;
    }
}

body {
    background: var(--inv-bg);
    color: var(--inv-text);
    font-family: var(--inv-font);
    font-size: .925rem;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--inv-font);
    letter-spacing: -.01em;
}

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

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

.text-muted {
    color: var(--inv-text-muted) !important;
}

::selection {
    background: rgba(var(--inv-primary-rgb), .18);
}

::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, .18);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

.inv-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, .18);
}

:focus-visible {
    outline: 2px solid var(--inv-primary);
    outline-offset: 1px;
}

/* ---------- Bootstrap primary retheme (brand green, not Bootstrap blue) ---------- */
.btn-primary {
    --bs-btn-color: #fff;
    --bs-btn-bg: var(--inv-primary);
    --bs-btn-border-color: var(--inv-primary);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--inv-primary-dark);
    --bs-btn-hover-border-color: var(--inv-primary-dark);
    --bs-btn-focus-shadow-rgb: var(--inv-primary-rgb);
    --bs-btn-active-color: #fff;
    --bs-btn-active-bg: var(--inv-primary-dark);
    --bs-btn-active-border-color: var(--inv-primary-dark);
    --bs-btn-disabled-bg: var(--inv-primary);
    --bs-btn-disabled-border-color: var(--inv-primary);
    background-image: linear-gradient(135deg, var(--inv-primary-light) 0%, var(--inv-primary) 60%, var(--inv-primary-dark) 100%);
    border: none;
    box-shadow: var(--inv-shadow-sm);
}

.btn-primary:hover,
.btn-primary:focus {
    box-shadow: var(--inv-glow);
    transform: translateY(-1px);
}

.btn-outline-primary {
    --bs-btn-color: var(--inv-primary);
    --bs-btn-border-color: var(--inv-primary);
    --bs-btn-hover-color: #fff;
    --bs-btn-hover-bg: var(--inv-primary);
    --bs-btn-hover-border-color: var(--inv-primary);
    --bs-btn-focus-shadow-rgb: var(--inv-primary-rgb);
    --bs-btn-active-bg: var(--inv-primary);
    --bs-btn-active-border-color: var(--inv-primary);
}

.btn-outline-primary:hover {
    box-shadow: var(--inv-glow);
    transform: translateY(-1px);
}

.btn {
    font-weight: 600;
    border-radius: 8px;
    transition: filter .15s var(--inv-ease), box-shadow .15s var(--inv-ease), transform .15s var(--inv-ease);
}

.btn:active {
    transform: translateY(1px) !important;
    box-shadow: none !important;
}

.btn-sm {
    border-radius: 7px;
}

.text-primary {
    color: var(--inv-primary) !important;
}

.bg-primary {
    background-color: var(--inv-primary) !important;
}

.badge.bg-primary {
    background-color: var(--inv-primary) !important;
}

.border-primary {
    border-color: var(--inv-primary) !important;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--inv-primary-light);
    box-shadow: 0 0 0 .2rem rgba(var(--inv-primary-rgb), .15);
}

.form-check-input:checked {
    background-color: var(--inv-primary);
    border-color: var(--inv-primary);
}

.form-check-input:focus {
    border-color: var(--inv-primary-light);
    box-shadow: 0 0 0 .2rem rgba(var(--inv-primary-rgb), .15);
}

.page-link {
    color: var(--inv-primary);
    border-radius: 7px;
    margin: 0 2px;
    border-color: var(--inv-border);
    transition: background-color .15s var(--inv-ease), color .15s var(--inv-ease);
}

.page-link:hover {
    color: var(--inv-primary-dark);
    background-color: rgba(var(--inv-primary-rgb), .08);
}

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

.nav-tabs .nav-link.active {
    color: var(--inv-primary);
    border-bottom-color: var(--inv-primary);
    font-weight: 600;
}

.spinner-border.text-primary {
    border-color: var(--inv-primary);
    border-right-color: transparent;
}

/* ---------- Forms & tables polish ---------- */
.form-control,
.form-select {
    border-color: #d9dedb;
    border-radius: 8px;
    transition: border-color .15s var(--inv-ease), box-shadow .15s var(--inv-ease);
}

.form-label {
    font-weight: 600;
    font-size: .84rem;
    color: #3c453f;
    margin-bottom: .35rem;
}

.form-text {
    color: var(--inv-text-muted);
}

.table {
    --bs-table-hover-bg: rgba(var(--inv-primary-rgb), .035);
}

.table > thead {
    border-bottom: 1px solid var(--inv-border);
    background: #f9fafc;
}

.table > thead th {
    font-weight: 600;
    letter-spacing: .04em;
    padding-top: .85rem;
    padding-bottom: .85rem;
}

.table > tbody td {
    padding-top: .7rem;
    padding-bottom: .7rem;
}

.badge {
    font-weight: 600;
    letter-spacing: .01em;
    padding: .4em .75em;
    border-radius: 50px;
}

.table > tbody > tr {
    transition: background-color .12s var(--inv-ease);
}

.alert {
    border-radius: var(--inv-radius);
    border: none;
    box-shadow: var(--inv-shadow-sm);
}

/* ---------- Auth screen ---------- */
.inv-auth-wrap {
    min-height: 100vh;
    display: flex;
}

.inv-auth-wrap.text-center {
    /* 404 page reuses .inv-auth-wrap centered, not split */
    align-items: center;
    justify-content: center;
    padding: 24px;
}

@keyframes inv-gradient-shift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.inv-auth-brand-panel {
    flex: 1 1 50%;
    background: linear-gradient(155deg, var(--inv-sidebar-bg) 0%, var(--inv-primary-dark) 45%, var(--inv-primary) 75%, var(--inv-primary-light) 100%);
    background-size: 200% 200%;
    animation: inv-gradient-shift 14s ease infinite;
    color: #eef6f1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 64px;
    position: relative;
    overflow: hidden;
}

.inv-auth-brand-panel::before,
.inv-auth-brand-panel::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, .06);
}

.inv-auth-brand-panel::before {
    width: 340px;
    height: 340px;
    top: -120px;
    right: -100px;
}

.inv-auth-brand-panel::after {
    width: 220px;
    height: 220px;
    bottom: -80px;
    left: -60px;
}

.inv-auth-brand-panel > * {
    position: relative;
    z-index: 1;
}

.inv-auth-brand-mark {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.inv-auth-brand-mark .inv-logo {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: rgba(255, 255, 255, .15);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    backdrop-filter: blur(2px);
}

.inv-auth-headline {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.25;
    max-width: 420px;
    margin-bottom: 14px;
}

.inv-auth-subhead {
    color: rgba(238, 246, 241, .8);
    max-width: 400px;
    margin-bottom: 36px;
}

.inv-auth-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.inv-auth-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: .92rem;
    color: rgba(238, 246, 241, .92);
}

.inv-auth-feature-icon {
    flex: none;
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: rgba(255, 255, 255, .12);
    display: flex;
    align-items: center;
    justify-content: center;
}

.inv-auth-form-panel {
    flex: 1 1 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: #fbfcfb;
}

.inv-auth-card {
    width: 100%;
    max-width: 380px;
    background: #fff;
    border-radius: var(--inv-radius-lg);
    box-shadow: var(--inv-shadow-lg);
    border: 1px solid var(--inv-border);
    padding: 40px;
}

.inv-auth-mobile-brand {
    display: none;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
}

.inv-auth-mobile-brand .inv-logo {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--inv-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.inv-password-wrapper {
    position: relative;
}

.inv-password-wrapper input {
    padding-right: 42px;
}

.inv-password-toggle {
    position: absolute;
    top: 50%;
    right: 10px;
    transform: translateY(-50%);
    border: 0;
    background: none;
    padding: 4px;
    color: #8a938e;
    display: flex;
    line-height: 0;
    transition: color .15s var(--inv-ease);
}

.inv-password-toggle:hover {
    color: var(--inv-primary);
}

@media (max-width: 991.98px) {
    .inv-auth-brand-panel {
        display: none;
    }

    .inv-auth-form-panel {
        flex: 1 1 100%;
    }

    .inv-auth-mobile-brand {
        display: flex;
    }
}

/* ---------- App shell ---------- */
.inv-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 230px;
    background: linear-gradient(180deg, #182644 0%, var(--inv-sidebar-bg) 100%);
    color: var(--inv-sidebar-fg);
    display: flex;
    flex-direction: column;
    z-index: 1030;
    box-shadow: var(--inv-shadow-lg);
    transition: transform .25s var(--inv-ease);
}

.inv-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.inv-brand .inv-logo {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--inv-primary-light), var(--inv-primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    box-shadow: 0 3px 10px rgba(0, 0, 0, .25);
}

.inv-brand-text {
    line-height: 1.1;
}

.inv-brand-name {
    display: block;
    font-weight: 700;
}

.inv-brand-sub {
    display: block;
    font-size: .72rem;
    opacity: .65;
}

.inv-nav {
    flex: 1;
    overflow-y: auto;
    padding: 10px 8px;
}

.inv-nav-label {
    font-size: .68rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    opacity: .55;
    padding: 10px 10px 4px;
    margin: 0;
}

.inv-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 8px;
    color: var(--inv-sidebar-fg);
    text-decoration: none;
    font-size: .89rem;
    font-weight: 500;
    margin-bottom: 2px;
    transition: background .15s var(--inv-ease), color .15s var(--inv-ease), transform .15s var(--inv-ease);
}

.inv-nav-item:hover {
    background: var(--inv-sidebar-bg-active);
    color: var(--inv-sidebar-fg-active);
    transform: translateX(2px);
}

.inv-nav-item.active {
    background: linear-gradient(135deg, var(--inv-primary-light) 0%, var(--inv-primary) 55%, var(--inv-primary-dark) 100%);
    color: #fff;
    font-weight: 600;
    box-shadow: var(--inv-glow);
}

.inv-nav-item.active:hover {
    transform: none;
}

.inv-nav-icon {
    font-size: 1rem;
    width: 18px;
    text-align: center;
    flex: none;
    opacity: .85;
}

.inv-nav-item.active .inv-nav-icon {
    opacity: 1;
}

.inv-nav-parent {
    cursor: pointer;
}

.inv-nav-chevron {
    font-size: .65rem;
    opacity: .5;
    flex: none;
    transition: transform .2s var(--inv-ease), opacity .2s var(--inv-ease);
}

.inv-nav-parent:hover .inv-nav-chevron {
    opacity: .8;
}

.inv-nav-parent[aria-expanded="true"] .inv-nav-chevron {
    transform: rotate(90deg);
    opacity: .95;
}

.inv-nav-submenu {
    display: flex;
    flex-direction: column;
    gap: 1px;
    margin: 2px 10px 6px 29px;
    padding-left: 13px;
    border-left: 1px solid rgba(255, 255, 255, .12);
}

.inv-nav-subitem {
    position: relative;
    padding: 6px 10px;
    border-radius: 6px;
    color: var(--inv-sidebar-fg);
    text-decoration: none;
    font-size: .82rem;
    line-height: 1.3;
    opacity: .8;
    transition: background .15s var(--inv-ease), color .15s var(--inv-ease), opacity .15s var(--inv-ease);
}

.inv-nav-subitem:hover {
    background: var(--inv-sidebar-bg-active);
    color: var(--inv-sidebar-fg-active);
    opacity: 1;
}

.inv-nav-subitem.active {
    background: rgba(var(--inv-primary-rgb), .22);
    color: #fff;
    opacity: 1;
    font-weight: 600;
}

.inv-nav-subitem.active::before {
    content: "";
    position: absolute;
    left: -14px;
    top: 50%;
    width: 8px;
    height: 1px;
    background: rgba(var(--inv-primary-rgb), .7);
}

.inv-sidebar-footer {
    padding: 10px 8px;
    border-top: 1px solid rgba(255, 255, 255, .08);
}

.inv-main {
    margin-left: 230px;
    min-height: 100vh;
}

.inv-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    padding: 12px 24px;
    min-height: 70px;
    border-bottom: 1px solid var(--inv-border);
    box-shadow: 0 1px 3px rgba(20, 30, 60, .04);
    position: sticky;
    top: 0;
    z-index: 1020;
}

.inv-viewing-banner {
    background: linear-gradient(135deg, var(--inv-primary-dark), var(--inv-primary));
    color: #fff;
    padding: 10px 24px;
    font-size: .92rem;
}

.inv-viewing-banner .btn-light {
    color: var(--inv-primary-dark);
    font-weight: 600;
}

.inv-user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--inv-primary-light), var(--inv-primary-dark));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .85rem;
    flex: none;
    box-shadow: 0 0 0 3px var(--inv-primary-soft);
}

.inv-user-avatar i {
    font-size: 1.2rem;
}

.inv-user-menu-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    border: none;
    background: none;
    padding: 6px 8px;
    border-radius: 999px;
    transition: background-color .15s var(--inv-ease);
}

.inv-user-menu-toggle:hover,
.inv-user-menu-toggle:focus,
.inv-user-menu-toggle[aria-expanded="true"] {
    background-color: var(--inv-primary-soft);
    outline: none;
}

.inv-user-menu-toggle::after {
    display: none;
}

.dropdown-menu {
    border-radius: var(--inv-radius);
    border: 1px solid var(--inv-border);
    box-shadow: var(--inv-shadow-md);
    padding: 8px;
    min-width: 220px;
}

.dropdown-header {
    padding: 8px 10px 6px;
    font-size: .82rem;
}

.dropdown-header .text-muted {
    font-size: .76rem;
}

.dropdown-divider {
    border-color: var(--inv-border);
    margin: 4px 0;
}

.dropdown-item {
    border-radius: 8px;
    padding: 8px 10px;
    font-size: .875rem;
    transition: background-color .12s var(--inv-ease), color .12s var(--inv-ease);
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: var(--inv-primary-soft);
    color: var(--inv-primary-dark);
}

.dropdown-item.text-danger:hover,
.dropdown-item.text-danger:focus {
    background-color: #fef2f2;
    color: #dc2626;
}

.inv-content {
    padding: 24px;
    max-width: 1440px;
    animation: inv-fade-in .35s var(--inv-ease);
}

.inv-card {
    background: #fff;
    border-radius: var(--inv-radius);
    border: 1px solid var(--inv-border);
    box-shadow: var(--inv-shadow-sm);
    transition: box-shadow .2s var(--inv-ease), transform .2s var(--inv-ease), border-color .2s var(--inv-ease);
}

a:hover .inv-card {
    box-shadow: var(--inv-shadow-md);
    transform: translateY(-2px);
    border-color: rgba(var(--inv-primary-rgb), .25);
}

.inv-page-title {
    font-weight: 700;
    letter-spacing: -.015em;
}

.inv-stat-card {
    background: #fff;
    border-radius: var(--inv-radius);
    border: 1px solid var(--inv-border);
    box-shadow: var(--inv-shadow-sm);
    padding: 18px 20px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    transition: box-shadow .2s var(--inv-ease), transform .2s var(--inv-ease);
}

.inv-stat-card:hover {
    box-shadow: var(--inv-shadow-md);
    transform: translateY(-2px);
}

.inv-stat-card:hover .inv-stat-icon {
    transform: scale(1.08);
}

.inv-stat-icon {
    flex: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--inv-primary-soft);
    color: var(--inv-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    transition: transform .2s var(--inv-ease);
}

.inv-stat-label {
    font-size: .8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .03em;
    color: var(--inv-text-muted);
}

.inv-stat-value {
    font-size: 1.7rem;
    font-weight: 700;
    letter-spacing: -.02em;
}

.inv-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .4);
    z-index: 1025;
}

@media (max-width: 991.98px) {
    .inv-sidebar {
        transform: translateX(-100%);
    }

    .inv-sidebar.show {
        transform: translateX(0);
    }

    .inv-main {
        margin-left: 0;
    }

    .inv-overlay.show {
        display: block;
    }
}

/* ---------- Invoice builder ---------- */
.inv-line-row .form-control,
.inv-line-row .form-select {
    font-size: .88rem;
}

.inv-product-results {
    position: absolute;
    z-index: 1050;
    background: #fff;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    max-height: 260px;
    overflow-y: auto;
    width: 100%;
    box-shadow: 0 8px 20px rgba(0, 0, 0, .1);
}

.inv-product-results button {
    display: block;
    width: 100%;
    text-align: left;
    border: 0;
    background: none;
    padding: 8px 12px;
}

.inv-product-results button:hover {
    background: #f1f3f5;
}

/* ---------- Receipts ---------- */
.receipt-thermal {
    width: 80mm;
    margin: 0 auto;
    font-family: 'DejaVu Sans', Arial, Helvetica, sans-serif;
    font-size: 12px;
}

.receipt-thermal.size-58 {
    width: 58mm;
    font-size: 11px;
}

.receipt-thermal table {
    width: 100%;
}

.receipt-a4 {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 32px;
}

@media print {
    .no-print {
        display: none !important;
    }

    .inv-sidebar,
    .inv-header {
        display: none !important;
    }

    .inv-main {
        margin-left: 0 !important;
    }

    body {
        background: #fff;
    }
}