:root {
    --montana-navy: #0e1c2f;
    --montana-navy-2: #16324f;
    --montana-steel: #245074;
    --montana-amber: #e3a008;
    --montana-amber-dark: #b7791f;
    --montana-bg: #f3f5f8;
    --montana-line: #e2e8f0;
    --montana-text: #1c2834;
    --sidebar-width: 260px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    color: var(--montana-text);
    background: var(--montana-bg);
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

a { color: var(--montana-steel); }
a:hover { color: #16324f; }

.skip-link {
    position: absolute;
    left: 1rem;
    top: -40px;
    background: #fff;
    padding: .5rem .75rem;
    z-index: 2000;
}
.skip-link:focus { top: .5rem; }

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

.sidebar {
    width: var(--sidebar-width);
    background: var(--montana-navy);
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 1040;
    transition: transform .2s ease;
}

.sidebar-brand {
    display: flex;
    gap: .75rem;
    align-items: center;
    padding: 1.15rem 1rem 1rem;
    border-bottom: 3px solid var(--montana-amber);
}
.sidebar-brand img, .brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    object-fit: cover;
    background: var(--montana-amber);
    color: var(--montana-navy);
    display: grid;
    place-items: center;
    font-weight: 800;
}
.sidebar-brand strong { display: block; font-size: .95rem; line-height: 1.2; }
.sidebar-brand span { display: block; color: #c5d0dc; font-size: .75rem; }

.sidebar nav { padding: .75rem; overflow: auto; }
.nav-section {
    color: #8ea0b5;
    font-size: .7rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin: 1rem .5rem .35rem;
}
.sidebar a.nav-link {
    color: #e8eef5;
    border-radius: 8px;
    padding: .55rem .7rem;
    display: flex;
    align-items: center;
    gap: .65rem;
    text-decoration: none;
}
.sidebar a.nav-link:hover,
.sidebar a.nav-link:focus { background: rgba(255,255,255,.08); color: #fff; }
.sidebar a.nav-link.active { background: var(--montana-amber); color: #1a1403; font-weight: 650; }

.app-main {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.topbar {
    background: #fff;
    border-bottom: 1px solid var(--montana-line);
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .5rem 1.25rem;
    position: sticky;
    top: 0;
    z-index: 1020;
}
.topbar-actions { display: flex; align-items: center; gap: .75rem; }

.connection-pill {
    border-radius: 999px;
    font-size: .75rem;
    padding: .2rem .55rem;
    background: #e8f6ee;
    color: #146c43;
}
.connection-pill.offline { background: #fdecea; color: #b42318; }

.content { padding: 1.25rem; flex: 1; }
.app-footer {
    padding: .8rem 1.25rem;
    color: #64748b;
    font-size: .8rem;
    border-top: 1px solid var(--montana-line);
    background: #fff;
}

.page-head { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; margin-bottom: 1rem; }
.page-head h1 { font-size: 1.45rem; margin: 0; }
.breadcrumb { margin: 0 0 .35rem; }

.stat-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: .85rem; }
.stat-card {
    background: #fff;
    border: 1px solid var(--montana-line);
    border-left: 4px solid var(--montana-amber);
    border-radius: 10px;
    padding: .9rem 1rem;
}
.stat-card span { display: block; color: #64748b; font-size: .8rem; }
.stat-card strong { font-size: 1.45rem; }

.panel {
    background: #fff;
    border: 1px solid var(--montana-line);
    border-radius: 12px;
    padding: 1rem;
}
.panel + .panel, .stack-gap { margin-top: 1rem; }

.btn-accent {
    background: var(--montana-amber);
    border-color: var(--montana-amber-dark);
    color: #1a1403;
    font-weight: 650;
}
.btn-accent:hover, .btn-accent:focus { background: #c48d06; color: #1a1403; }

.table thead th { font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; color: #526174; white-space: nowrap; }
.table td { vertical-align: middle; }

.empty-state { text-align: center; padding: 2.5rem 1rem; color: #526174; }
.empty-state i { font-size: 2rem; color: var(--montana-steel); }
.empty-state h2 { font-size: 1.05rem; color: var(--montana-text); }

.status-bars { display: grid; gap: .55rem; }
.status-bars .bar { height: 8px; background: #e8eef5; border-radius: 99px; overflow: hidden; }
.status-bars .bar span { display: block; height: 100%; background: var(--montana-steel); }
.status-row { display: grid; grid-template-columns: 140px 1fr 2rem; gap: .5rem; align-items: center; font-size: .85rem; }

.preview-grid, .thumb-row { display: flex; flex-wrap: wrap; gap: .5rem; }
.preview-thumb, .thumb-row img, .product-photo {
    width: 92px;
    height: 72px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--montana-line);
    background: #f8fafc;
}
.product-hero {
    width: 100%;
    max-height: 320px;
    object-fit: cover;
    border-radius: 12px;
    background: #e8eef5;
}

.guest-body {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    background: #fff;
}
.guest-hero {
    background: linear-gradient(160deg, var(--montana-navy), #1d4e73 70%);
    color: #fff;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.guest-hero h1 { font-size: 2.3rem; max-width: 14ch; }
.guest-panel { display: grid; place-items: center; padding: 2rem; }
.auth-card { width: min(420px, 100%); }
.auth-card h2 { margin-bottom: .25rem; }

.sidebar-backdrop { display: none; }
.menu-toggle { display: none; }

@media (max-width: 1199px) {
    .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 991px) {
    .sidebar { transform: translateX(-105%); }
    .sidebar.show { transform: none; }
    .sidebar-backdrop.show { display: block; position: fixed; inset: 0; background: rgba(8, 15, 24, .45); z-index: 1030; }
    .app-main { margin-left: 0; }
    .menu-toggle { display: inline-flex; }
    .guest-body { grid-template-columns: 1fr; }
    .guest-hero { min-height: 220px; padding: 1.5rem; }
    .guest-hero h1 { font-size: 1.7rem; }
}
@media (max-width: 575px) {
    .stat-grid { grid-template-columns: 1fr; }
    .page-head { flex-direction: column; }
    .content { padding: .85rem; }
}