:root {
    --brand: #1a7f5a;
    --brand-dark: #145c42;
    --bg: #f5f7f6;
    --panel: #ffffff;
    --border: #e2e6e4;
    --text: #1f2a24;
    --text-muted: #6b756f;
    --danger: #d64545;
    --warning: #e08a1e;
    --radius: 10px;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
}

/* ---------- Auth pages ---------- */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}
.auth-card {
    background: var(--panel);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    width: 100%;
    max-width: 380px;
}
.auth-card h1 { font-size: 20px; margin: 0 0 2px; color: var(--brand-dark); }
.auth-card h2 { font-size: 15px; font-weight: 500; color: var(--text-muted); margin: 0 0 24px; }
.auth-card label { display: block; font-size: 13px; margin: 14px 0 6px; color: var(--text-muted); }
.auth-card input {
    width: 100%; padding: 10px 12px; border: 1px solid var(--border);
    border-radius: 8px; font-size: 14px;
}
.auth-card input:focus { outline: none; border-color: var(--brand); }
.btn {
    display: inline-block; margin-top: 20px; width: 100%; padding: 11px;
    background: var(--brand); color: #fff; border: none; border-radius: 8px;
    font-size: 15px; font-weight: 600; cursor: pointer; text-align: center; text-decoration: none;
}
.btn:hover { background: var(--brand-dark); }
.alert { padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 10px; }
.alert-error { background: #fdeaea; color: var(--danger); }
.alert-success { background: #e8f6ee; color: var(--brand-dark); }

/* ---------- App layout ---------- */
.app-layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 220px; background: var(--brand-dark); color: #fff;
    display: flex; flex-direction: column; flex-shrink: 0;
}
.sidebar-brand { font-size: 18px; font-weight: 700; padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.sidebar nav ul { list-style: none; margin: 0; padding: 8px 0; flex: 1; }
.sidebar nav li a {
    display: block; padding: 11px 20px; color: rgba(255,255,255,0.85);
    text-decoration: none; font-size: 14px;
}
.sidebar nav li a:hover { background: rgba(255,255,255,0.08); }
.sidebar nav li.active a { background: var(--brand); color: #fff; font-weight: 600; }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.1); }
.sidebar-user { font-size: 13px; margin-bottom: 8px; }
.sidebar-user span { color: rgba(255,255,255,0.6); }
.btn-logout { color: #fff; font-size: 13px; text-decoration: underline; }

.content { flex: 1; padding: 24px 32px; overflow-x: auto; }
.content-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 20px; }
.content-header h1 { margin: 0; font-size: 22px; }
.content-header-meta { color: var(--text-muted); font-size: 13px; }

.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 24px; }
.kpi-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.kpi-card.kpi-warning { border-color: #f3d9a8; background: #fffaf0; }
.kpi-label { font-size: 12px; color: var(--text-muted); margin-bottom: 6px; }
.kpi-value { font-size: 24px; font-weight: 700; }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.panel h2 { margin-top: 0; font-size: 16px; }
.panel p { color: var(--text-muted); font-size: 14px; line-height: 1.6; }

/* ---------- Shared: forms & data tables (Products/Inventory/Purchases/etc.) ---------- */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.form-grid label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.form-grid input, .form-grid select, .form-grid textarea {
    width: 100%; padding: 9px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px;
}
.form-submit { display: flex; align-items: flex-end; }
.form-submit .btn { width: auto; padding: 10px 22px; margin: 0; }

.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.data-table th { text-align: left; padding: 10px 8px; border-bottom: 2px solid var(--border); color: var(--text-muted); font-size: 12px; }
.data-table td { padding: 9px 8px; border-bottom: 1px solid var(--border); }
.data-table tr:hover { background: #fafbfa; }
.text-danger { color: var(--danger); font-weight: 600; }
.btn-link { background: none; border: none; color: var(--brand); cursor: pointer; font-size: 13px; text-decoration: underline; padding: 0; }
.btn-sm { padding: 6px 12px; font-size: 12px; width: auto; margin: 0; display: inline-block; }
.filter-bar { display: flex; gap: 10px; align-items: flex-end; margin-bottom: 16px; flex-wrap: wrap; }
.filter-bar label { display:block; font-size:12px; color:var(--text-muted); margin-bottom:4px; }
.filter-bar input, .filter-bar select { padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.badge-success { background: #e8f6ee; color: var(--brand-dark); }
.badge-danger { background: #fdeaea; color: var(--danger); }
.badge-warning { background: #fff4e0; color: var(--warning); }

.pagination-bar {
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
    background: #f0f7f3; border: 2px solid var(--brand); border-radius: 8px;
    padding: 12px 14px; margin: 14px 0;
}
.pagination-label { margin-left: auto; font-weight: 700; color: var(--brand-dark); font-size: 13px; }

@media (max-width: 768px) {
    .app-layout { flex-direction: column; }
    .sidebar { width: 100%; }
}