:root {
    --bg: #f3f6fb;
    --card: #ffffff;
    --line: #d7dfeb;
    --text: #18212f;
    --muted: #64748b;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #475569;
    --danger: #dc2626;
    --success-bg: #ecfdf5;
    --success-text: #065f46;
    --error-bg: #fef2f2;
    --error-text: #991b1b;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(180deg, #eef4ff 0%, var(--bg) 180px);
    color: var(--text);
}
.shell {
    max-width: 1200px;
    margin: 0 auto;
    padding: 22px;
}
.topbar, .card, .footer {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}
.topbar {
    padding: 22px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.topbar h1 { margin: 0 0 4px; font-size: 30px; }
.topbar h1 a { text-decoration: none; color: inherit; }
.topbar p { margin: 0; color: var(--muted); }
.topnav { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.topnav a { text-decoration: none; color: var(--text); padding: 10px 12px; border-radius: 10px; }
.topnav a:hover { background: #eef2ff; }
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
}
.card {
    padding: 22px;
    margin-bottom: 18px;
}
.hero {
    display: grid;
    grid-template-columns: 1.4fr .9fr;
    gap: 18px;
}
.hero .card h2, .card h2, .card h3 { margin-top: 0; }
.kpis {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin-top: 16px;
}
.kpi-box {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 14px;
    background: #fafcff;
}
.kpi-number { font-size: 32px; font-weight: 700; margin-top: 8px; }
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
}
label {
    display: block;
    font-weight: bold;
    margin-bottom: 6px;
}
input, textarea, select {
    width: 100%;
    border: 1px solid #c7d2e2;
    border-radius: 12px;
    padding: 12px 13px;
    font-size: 15px;
    background: #fff;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: #7aa2ff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08);
}
textarea { min-height: 100px; resize: vertical; }
.button {
    display: inline-block;
    padding: 11px 15px;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
}
.button:hover { background: var(--primary-dark); }
.button.secondary { background: var(--secondary); }
.button.danger { background: var(--danger); }
.button.light {
    background: #e8eefc;
    color: #123;
}
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.flash {
    padding: 14px 16px;
    border-radius: 14px;
    margin-bottom: 18px;
    border: 1px solid;
}
.flash.success { background: var(--success-bg); color: var(--success-text); border-color: #a7f3d0; }
.flash.error { background: var(--error-bg); color: var(--error-text); border-color: #fecaca; }
.table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}
th, td {
    padding: 12px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}
th { background: #f8fbff; }
.muted { color: var(--muted); }
.search-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
    align-items: end;
}
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    background: #eef2ff;
    color: #334155;
    font-size: 12px;
}
.login-box {
    max-width: 430px;
    margin: 60px auto;
}
.footer {
    margin-top: 22px;
    padding: 16px 20px;
    text-align: center;
    color: var(--muted);
}
.inline-form { display: inline; }
.barcode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px;
}
@media (max-width: 820px) {
    .hero { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .shell { padding: 12px; }
    .topbar { padding: 16px; }
    .search-grid { grid-template-columns: 1fr; }
}