*, *::before, *::after { box-sizing: border-box; }

:root {
    --bg-page:        #F9FAFB;
    --bg-card:        #FFFFFF;
    --border:         #E5E7EB;
    --text-primary:   #111827;
    --text-secondary: #6B7280;
    --text-muted:     #9CA3AF;
    --accent:         #FC4445;
    --accent-hover:   #e02d2e;
    --teal:           #0EA5E9;
    --teal-light:     #EFF6FF;
    --green:          #10B981;
    --green-light:    #ECFDF5;
    --red-light:      #FEF2F2;
    --orange-light:   #FFFBEB;
    --shadow-sm:      0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --radius:         10px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
}

/* ── SIDEBAR ─────────────────────────────── */
.sidebar {
    position: fixed; top: 0; left: 0;
    width: 220px; height: 100vh;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    padding: 24px 0; z-index: 100;
}
.sidebar-brand {
    display: flex; align-items: center; gap: 10px;
    padding: 0 20px 24px;
    font-size: 16px; font-weight: 700;
    color: var(--text-primary); text-decoration: none;
    border-bottom: 1px solid var(--border);
}
.sidebar-brand .logo-icon {
    width: 32px; height: 32px;
    background: var(--accent); border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
}
.sidebar-nav {
    padding: 16px 12px;
    display: flex; flex-direction: column; gap: 2px; flex: 1;
}
.sidebar-nav .nav-label {
    font-size: 11px; font-weight: 600;
    color: var(--text-muted); text-transform: uppercase;
    letter-spacing: .06em; padding: 8px 8px 4px;
}
.sidebar-nav a {
    display: flex; align-items: center; gap: 10px;
    padding: 8px 10px; border-radius: 7px;
    color: var(--text-secondary); text-decoration: none;
    font-weight: 500; font-size: 13.5px;
    transition: background .15s, color .15s;
}
.sidebar-nav a:hover { background: var(--bg-page); color: var(--text-primary); }
.sidebar-nav a .nav-icon { font-size: 15px; width: 20px; text-align: center; }

/* ── MAIN ────────────────────────────────── */
.main-content { margin-left: 220px; padding: 32px 36px; min-height: 100vh; }

/* ── PAGE HEADER ─────────────────────────── */
.page-header {
    display: flex; align-items: center;
    justify-content: space-between; margin-bottom: 24px;
}
.page-title { font-size: 22px; font-weight: 700; margin: 0; }
.page-subtitle { font-size: 13px; color: var(--text-secondary); margin-top: 2px; }

/* ── CARD ────────────────────────────────── */
.data-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

/* ── TABLE ───────────────────────────────── */
.table-saas { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table-saas thead th {
    background: var(--bg-page);
    color: var(--text-muted);
    font-weight: 600; font-size: 11.5px;
    text-transform: uppercase; letter-spacing: .05em;
    padding: 11px 16px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
.table-saas tbody td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
.table-saas tbody tr:last-child td { border-bottom: none; }
.table-saas tbody tr { transition: background .12s; }
.table-saas tbody tr:hover { background: #FAFAFA; }

.cell-article {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 12px; color: var(--teal); font-weight: 600;
}
.cell-name { font-weight: 500; }
.cost-main { font-weight: 600; }
.cost-detail { font-size: 11.5px; color: var(--text-muted); margin-top: 2px; }
.profit-positive { color: var(--green); font-weight: 600; }
.profit-negative { color: var(--accent); font-weight: 600; }

/* ── STATUS BADGES ───────────────────────── */
.badge-status {
    display: inline-flex; align-items: center;
    font-size: 12px; font-weight: 500;
    padding: 3px 10px; border-radius: 20px; white-space: nowrap;
}
.badge-in_stock_warehouse { background: var(--green-light); color: #065F46; }
.badge-in_stock_ozon { background: var(--teal-light);  color: #1E40AF; }
.badge-in_sale { background: #FFF8D8; color: #92400E; }
.badge-sold     { background: var(--red-light);   color: #991B1B; }

/* ── BUTTONS ─────────────────────────────── */
.btn-primary-saas {
    background: var(--accent); color: #fff;
    border: none; border-radius: 7px; padding: 8px 16px;
    font-size: 13.5px; font-weight: 600; cursor: pointer;
    transition: background .15s, box-shadow .15s, transform .1s;
    text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
}
.btn-primary-saas:hover {
    background: var(--accent-hover); color: #fff;
    box-shadow: 0 4px 12px rgba(252,68,69,.35);
    transform: translateY(-1px);
}
.btn-secondary-saas {
    background: var(--bg-card); color: var(--text-primary);
    border: 1px solid var(--border); border-radius: 7px;
    padding: 8px 16px; font-size: 13.5px; font-weight: 600;
    cursor: pointer; transition: background .15s, box-shadow .15s;
    text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
}
.btn-secondary-saas:hover {
    background: var(--bg-page); color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

/* ── FORM CARD ───────────────────────────── */
.form-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); box-shadow: var(--shadow-sm);
    padding: 32px; max-width: 520px;
}
.form-card label {
    font-weight: 500; font-size: 13.5px; margin-bottom: 6px; display: block;
}
.form-card .form-control,
.form-card .form-select {
    border: 1px solid var(--border); border-radius: 7px;
    padding: 8px 12px; font-size: 13.5px;
    transition: border-color .15s, box-shadow .15s;
    width: 100%;
}
.form-card .form-control:focus,
.form-card .form-select:focus {
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(14,165,233,.15);
    outline: none;
}

/* ── ALERTS ──────────────────────────────── */
.message-stack {
    position: fixed;
    top: 22px;
    left: calc(220px + (100vw - 220px) / 2);
    transform: translateX(-50%);
    width: min(620px, calc(100vw - 32px));
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}
.message-stack .alert {
    pointer-events: auto;
    margin: 0;
    border-radius: 12px;
    box-shadow: 0 16px 36px rgba(17,24,39,.14), 0 4px 10px rgba(17,24,39,.08);
    animation: alert-slide-in .28s ease-out both;
}
.alert { border-radius: 8px; font-size: 13.5px; border: 1px solid; }
.alert-success { background: #ECFDF5; border-color: #A7F3D0; color: #065F46; }
.alert-danger  { background: var(--red-light); border-color: #FECACA; color: #991B1B; }
.alert-warning { background: var(--orange-light); border-color: #FDE68A; color: #92400E; }

@keyframes alert-slide-in {
    from {
        opacity: 0;
        transform: translateY(-12px) scale(.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ── FORMAT HINT ─────────────────────────── */
.format-hint {
    background: var(--bg-page); border: 1px dashed var(--border);
    border-radius: 8px; padding: 16px; margin-top: 20px;
}
.format-hint h6 {
    font-size: 11.5px; font-weight: 600; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: .05em; margin-bottom: 10px;
}
.format-hint table td {
    font-size: 12px; color: var(--text-secondary);
    padding: 4px 8px; background: var(--bg-card);
    border: 1px solid var(--border);
}

/* ── EMPTY STATE ─────────────────────────── */
.empty-state { text-align: center; padding: 64px 24px; color: var(--text-muted); }
.empty-state .empty-icon { font-size: 40px; margin-bottom: 12px; }
.empty-state h5 { font-size: 16px; color: var(--text-secondary); margin-bottom: 6px; }

@media (max-width: 768px) {
    .sidebar { display: none; }
    .main-content { margin-left: 0; padding: 20px 16px; }
    .message-stack {
        left: 50%;
        top: 14px;
    }
}