:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-soft: #eff6ff;
    --success: #059669;
    --warning: #d97706;
    --danger: #dc2626;
    --sidebar: #0f172a;
    --sidebar-muted: #94a3b8;
    --bg: #f3f5f9;
    --panel: #ffffff;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --input: #f8fafc;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
    --shadow-soft: 0 1px 2px rgba(15, 23, 42, 0.04), 0 12px 32px rgba(15, 23, 42, 0.05);
    --radius: 16px;
    --sidebar-width: 272px;
    --focus: 0 0 0 4px rgba(37, 99, 235, 0.16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    min-height: 100vh;
    font-family: "Inter", "Segoe UI", sans-serif;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
}
body.modal-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea, label { font: inherit; }
button { cursor: pointer; }
img { max-width: 100%; display: block; }

.app-shell {
    min-height: 100vh;
}

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 40;
    display: flex;
    flex-direction: column;
    width: var(--sidebar-width);
    height: 100vh;
    overflow: hidden;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.28), transparent 32%),
        var(--sidebar);
    color: #fff;
    padding: 1.25rem 0.9rem 1rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.35rem 0.55rem 1rem;
}

.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: linear-gradient(180deg, #3b82f6, #1d4ed8);
    color: #fff;
    font-weight: 800;
}
.brand-mark.large { width: 56px; height: 56px; margin: 0 auto 1rem; font-size: 1.15rem; }
.brand h2 { margin: 0; font-size: 1rem; letter-spacing: -0.03em; }
.brand small { color: var(--sidebar-muted); display: block; margin-top: 0.2rem; }

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.28rem;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(148, 163, 184, 0.45) transparent;
}
.nav-menu::-webkit-scrollbar { width: 8px; }
.nav-menu::-webkit-scrollbar-thumb { background: rgba(148, 163, 184, 0.4); border-radius: 999px; }
.nav-section {
    margin: 1rem 0.7rem 0.35rem;
    color: #64748b;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.72rem 0.85rem;
    border-radius: 12px;
    color: #cbd5e1;
    font-weight: 600;
}
.nav-link:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-link.active {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.38), rgba(37, 99, 235, 0.14));
    color: #fff;
    box-shadow: inset 3px 0 0 #60a5fa;
}
.nav-link.danger { color: #fca5a5; }
.nav-link.danger:hover { background: rgba(220, 38, 38, 0.16); color: #fecaca; }
.nav-icon { width: 1.15rem; text-align: center; }

.sidebar-footer { margin-top: auto; padding-top: 0.85rem; border-top: 1px solid rgba(148,163,184,0.16); flex-shrink: 0; }
.user-chip {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.7rem 0.75rem 0.9rem;
}
.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    background: #1e293b;
    font-weight: 700;
}
.user-chip strong, .user-chip small { display: block; }
.user-chip small { color: var(--sidebar-muted); text-transform: capitalize; }

.workspace {
    min-width: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    margin-left: var(--sidebar-width);
}
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 72px;
    padding: 0.75rem 1.5rem;
    background: rgba(255,255,255,0.92);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
    backdrop-filter: blur(14px);
    position: sticky;
    top: 0;
    z-index: 20;
}
.topbar-left, .topbar-right, .topbar-title {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    min-width: 0;
}
.topbar-title { flex-direction: column; align-items: flex-start; gap: 0.1rem; }
.topbar-title .eyebrow { line-height: 1; }
.topbar-title strong {
    font-size: 1.02rem;
    letter-spacing: -0.03em;
    white-space: nowrap;
}
.topbar-chip, .topbar-user {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    min-height: 42px;
    padding: 0.35rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: #fff;
    color: var(--text);
    font-weight: 700;
    font-size: 0.86rem;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}
.topbar-chip i { color: var(--primary); }
.topbar-user { padding-left: 0.35rem; padding-right: 0.9rem; }
.topbar-user strong, .topbar-user small { display: block; line-height: 1.15; }
.topbar-user strong { font-size: 0.84rem; }
.topbar-user small { color: var(--muted); font-weight: 600; text-transform: capitalize; font-size: 0.72rem; }
.topbar-user .user-avatar { width: 32px; height: 32px; background: var(--primary-soft); color: var(--primary-dark); font-size: 0.82rem; }
.icon-button.sidebar-toggle { display: none; }

.main-panel { padding: 1.4rem 1.5rem 2rem; }
.content-wrap { max-width: 1280px; margin: 0 auto; position: relative; }
.page-loader {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    background: rgba(243, 245, 249, 0.72);
    border-radius: var(--radius);
    z-index: 5;
    color: var(--primary-dark);
}

.page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.25rem;
}
.eyebrow {
    margin: 0;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.72rem;
    font-weight: 800;
}
.page-header h2 {
    margin: 0.3rem 0 0;
    letter-spacing: -0.04em;
    font-size: clamp(1.45rem, 2vw, 1.9rem);
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow-soft);
    padding: 0.35rem 0.35rem 0.45rem;
    overflow: hidden;
}
.panel + .panel, .margin-top { margin-top: 1rem; }
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin: 0;
    padding: 0.9rem 0.95rem 0.75rem;
}
.panel-header h3 { margin: 0; font-size: 1.02rem; letter-spacing: -0.02em; }

.toolbar, .toolbar-split {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin: 0;
    padding: 0.85rem 0.95rem 0.7rem;
}
.soft-label { color: var(--muted); display: inline-flex; align-items: center; gap: 0.55rem; font-weight: 600; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.status-ok { background: var(--success); }
.status-warn { background: var(--warning); }

.search-input, .search-input.compact {
    width: min(100%, 360px);
    padding: 0.72rem 0.95rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #fff;
}

.table-wrap {
    overflow-x: auto;
    margin: 0 0.35rem 0.2rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
}
.data-table { width: 100%; border-collapse: separate; border-spacing: 0; min-width: 640px; }
.data-table thead th {
    background: #f8fafc;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 0.68rem;
    font-weight: 800;
    padding: 0.82rem 0.9rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    white-space: nowrap;
    position: sticky;
    top: 0;
}
.data-table tbody td {
    padding: 0.82rem 0.9rem;
    border-bottom: 1px solid #eef2f7;
    vertical-align: middle;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:nth-child(even) { background: #fbfcfe; }
.data-table tbody tr:hover { background: #f1f5ff; }
.col-actions, td.table-actions { width: 1%; white-space: nowrap; }
.table-actions, .inline-form { display: inline-flex; align-items: center; gap: 0.4rem; }

.icon-button {
    width: 36px;
    height: 36px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    display: grid;
    place-items: center;
    padding: 0;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.icon-button.success { color: var(--success); background: #ecfdf5; border-color: #bbf7d0; }
.icon-button.danger { color: var(--danger); background: #fef2f2; border-color: #fecaca; }
.icon-button.primary { color: var(--primary-dark); background: var(--primary-soft); border-color: #bfdbfe; }
.icon-button:hover { transform: translateY(-1px); box-shadow: 0 8px 16px rgba(15, 23, 42, 0.08); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0.72rem 1.15rem;
    font-weight: 700;
    background: #fff;
    color: var(--text);
    transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 18px rgba(37, 99, 235, 0.2); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { border-color: var(--border); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-small { padding: 0.5rem 0.75rem; font-size: 0.88rem; }
.full-width, .w-100 { width: 100%; }

.badge {
    display: inline-flex;
    padding: 0.28rem 0.62rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: capitalize;
}
.badge-success { background: #ecfdf5; color: var(--success); }
.badge-warning { background: #fffbeb; color: var(--warning); }
.badge-primary { background: var(--primary-soft); color: var(--primary-dark); }

.alert {
    border-radius: 12px;
    padding: 0.8rem 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}
.alert-success { background: #ecfdf5; border: 1px solid #d1fae5; color: var(--success); }
.alert-error { background: #fef2f2; border: 1px solid #fecaca; color: var(--danger); }

input, select, textarea {
    width: 100%;
    padding: 0.72rem 0.85rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--input);
    color: var(--text);
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--focus);
    background: #fff;
}
label { display: block; margin-bottom: 0.4rem; font-size: 0.9rem; font-weight: 600; }
.form-grid { display: grid; gap: 0.9rem; }
.two-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.three-columns { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.hidden { display: none !important; }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}
.stat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.05rem 1.1rem;
    box-shadow: var(--shadow-soft);
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.9rem;
    position: relative;
    overflow: hidden;
}
.stat-card::after {
    content: "";
    position: absolute;
    right: -18px;
    top: -22px;
    width: 84px;
    height: 84px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.07;
}
.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    font-size: 1.05rem;
}
.stat-card span { color: var(--muted); font-weight: 600; font-size: 0.84rem; }
.stat-card strong { display: block; margin-top: 0.15rem; font-size: 1.55rem; letter-spacing: -0.04em; color: var(--text); }
.stat-card.primary { color: var(--primary); }
.stat-card.success { color: var(--success); }
.stat-card.warning { color: var(--warning); }
.stat-card.info { color: #0284c7; }
.stat-card.primary .stat-icon { background: #eff6ff; }
.stat-card.success .stat-icon { background: #ecfdf5; }
.stat-card.warning .stat-icon { background: #fffbeb; }
.stat-card.info .stat-icon { background: #f0f9ff; }

.cart-panel { padding: 1.05rem 1.1rem 1.15rem; }
.cart-panel h3 { margin: 0 0 0.9rem; letter-spacing: -0.02em; }
.cart-qty button { border-radius: 999px; }

.pos-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(320px, 0.8fr);
    gap: 1rem;
    align-items: start;
}
.cart-items { list-style: none; margin: 0 0 1rem; padding: 0; display: flex; flex-direction: column; gap: 0.6rem; }
.cart-items li {
    display: flex;
    justify-content: space-between;
    gap: 0.6rem;
    align-items: center;
    padding: 0.7rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #f8fafc;
}
.cart-qty { display: inline-flex; align-items: center; gap: 0.35rem; }
.cart-qty button { width: 26px; height: 26px; border-radius: 7px; border: 1px solid var(--border); background: #fff; }
.cart-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding: 0.85rem 0;
    border-top: 1px solid var(--border);
    font-size: 1.05rem;
}

.invoice-sheet { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 1.4rem; box-shadow: var(--shadow); }
.invoice-header, .invoice-meta, .invoice-total, .invoice-actions { display: flex; justify-content: space-between; gap: 1rem; }
.invoice-meta { margin: 1.2rem 0; }
.meta-box { flex: 1; background: #f8fafc; border-radius: 10px; padding: 0.85rem; }
.invoice-table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.invoice-table th, .invoice-table td { padding: 0.7rem; border-bottom: 1px solid var(--border); text-align: left; }
.invoice-total { font-size: 1.15rem; font-weight: 800; }

.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.48);
    backdrop-filter: blur(6px);
    display: grid;
    place-items: center;
    padding: 1rem;
    z-index: 1000;
}
.modal-card {
    width: min(720px, 100%);
    max-height: min(88vh, 820px);
    overflow: auto;
    background: #fff;
    border-radius: 22px;
    border: 1px solid rgba(255,255,255,0.6);
    box-shadow: 0 28px 70px rgba(15, 23, 42, 0.24);
    padding: 0;
    animation: modalIn 0.22s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: translateY(12px) scale(0.98); }
    to { opacity: 1; transform: none; }
}
.confirm-modal { width: min(440px, 100%); }
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin: 0;
    padding: 1.15rem 1.25rem;
    background:
        linear-gradient(180deg, #eff6ff 0%, #ffffff 78%);
    border-bottom: 1px solid var(--border);
}
.modal-heading { min-width: 0; }
.modal-kicker {
    display: block;
    margin-bottom: 0.2rem;
    color: var(--primary);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.modal-header h3 { margin: 0; font-size: 1.2rem; letter-spacing: -0.03em; }
.modal-card > form,
.confirm-modal > p {
    padding: 1.15rem 1.25rem 0;
}
.confirm-modal > p { margin: 0; color: #334155; line-height: 1.5; }
.close-modal {
    width: 36px;
    height: 36px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--muted);
    display: grid;
    place-items: center;
    flex: 0 0 auto;
}
.close-modal:hover { color: var(--text); background: #f8fafc; }
.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.7rem;
    margin-top: 1.15rem;
    padding: 0.95rem 1.25rem 1.15rem;
    border-top: 1px solid var(--border);
    background: #f8fafc;
}
.modal-card > form .modal-actions {
    margin-left: -1.25rem;
    margin-right: -1.25rem;
}
.modal-card .form-grid { gap: 1rem; }
.modal-card label { color: #334155; font-size: 0.82rem; letter-spacing: 0.01em; }
.modal-card input,
.modal-card select,
.modal-card textarea {
    min-height: 44px;
    border-radius: 12px;
    background: #fff;
}

.empty, .empty-cart { color: var(--muted); font-style: italic; }
.toast-container { position: fixed; right: 1rem; bottom: 1rem; display: flex; flex-direction: column; gap: 0.7rem; z-index: 1200; }
.toast {
    min-width: 240px;
    max-width: 340px;
    background: #0f172a;
    color: #fff;
    border-radius: 12px;
    padding: 0.85rem 1rem;
    box-shadow: var(--shadow);
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 1.5rem;
    background:
        radial-gradient(circle at top right, rgba(37,99,235,0.18), transparent 28%),
        linear-gradient(180deg, #0f172a 0%, #111827 45%, #f3f5f9 45%);
}
.login-box {
    width: min(440px, 100%);
    background: #fff;
    border-radius: 18px;
    padding: 2rem 1.6rem;
    box-shadow: 0 24px 50px rgba(15, 23, 42, 0.18);
}
.login-header { text-align: center; margin-bottom: 1.4rem; }
.login-header h1 { margin: 0 0 0.4rem; font-size: 1.5rem; }
.demo-credentials {
    margin-top: 1.2rem;
    padding: 0.85rem;
    border-radius: 10px;
    background: #f8fafc;
    color: var(--muted);
    font-size: 0.88rem;
}
.demo-credentials strong, .demo-credentials span { display: block; }
.auth-global-error { max-width: 440px; margin: 1rem auto; }

@media (max-width: 1100px) {
    .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .pos-layout { grid-template-columns: 1fr; }
    .topbar-title strong { display: none; }
}
@media (max-width: 860px) {
    .workspace { margin-left: 0; }
    .sidebar {
        width: min(280px, 86vw);
        transform: translateX(-105%);
        transition: transform 0.2s ease;
        box-shadow: none;
    }
    .sidebar.is-open {
        transform: translateX(0);
        box-shadow: 16px 0 40px rgba(15, 23, 42, 0.28);
    }
    .icon-button.sidebar-toggle { display: grid; }
    .two-columns, .three-columns { grid-template-columns: 1fr; }
    .topbar-user span:last-child { display: none; }
    .topbar-user { padding-right: 0.35rem; }
}
@media (max-width: 560px) {
    .page-header, .toolbar, .toolbar-split, .invoice-header, .invoice-meta, .invoice-actions { flex-direction: column; align-items: flex-start; }
    .search-input, .search-input.compact { width: 100%; }
    .stats-grid { grid-template-columns: 1fr; }
    .main-panel { padding: 1rem; }
    .topbar { padding: 0.7rem 1rem; }
    .topbar-chip { display: none; }
    .modal-actions { flex-direction: column-reverse; }
    .modal-actions .btn { width: 100%; }
}