:root {
    --bg: #f4f6f8;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --text: #18212f;
    --muted: #677386;
    --border: #dde3ea;
    --primary: #2f6fed;
    --primary-dark: #1f53bc;
    --success: #18864b;
    --danger: #c43b3b;
    --warning: #b66b00;
    --info: #176b87;
    --shadow: 0 10px 30px rgba(24, 33, 47, .07);
    --radius: 14px;
}

* { box-sizing: border-box; }
html { min-height: 100%; background: var(--bg); }
body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
button, input, select, textarea { font: inherit; }

.app-shell { min-height: 100vh; display: grid; grid-template-columns: 250px minmax(0, 1fr); }
.sidebar {
    position: sticky; top: 0; height: 100vh; padding: 24px 18px;
    background: #152033; color: #fff; display: flex; flex-direction: column;
}
.brand { color: #fff; display: flex; gap: 12px; align-items: center; font-weight: 750; line-height: 1.2; margin-bottom: 32px; }
.brand:hover { color: #fff; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 10px; background: var(--primary); font-size: 14px; letter-spacing: .04em; }
.nav { display: grid; gap: 7px; }
.nav-link { color: #b9c4d5; padding: 11px 13px; border-radius: 10px; font-weight: 600; }
.nav-link:hover, .nav-link.active { color: #fff; background: rgba(255,255,255,.09); }
.sidebar-footer { margin-top: auto; padding: 14px 8px 0; border-top: 1px solid rgba(255,255,255,.12); display: flex; justify-content: space-between; color: #b9c4d5; font-size: 14px; }
.sidebar-footer a { color: #fff; }

.main-content { min-width: 0; padding: 30px 34px 20px; }
.page-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 24px; }
.page-header h1 { margin: 0; font-size: clamp(25px, 3vw, 34px); letter-spacing: -.03em; }
.eyebrow { margin: 0 0 4px; color: var(--muted); text-transform: uppercase; letter-spacing: .12em; font-size: 11px; font-weight: 750; }
.page-footer { margin-top: 32px; padding: 18px 0; color: var(--muted); border-top: 1px solid var(--border); display: flex; justify-content: space-between; font-size: 13px; }

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.card-title { margin: 0 0 15px; font-size: 17px; }
.stat-card { padding: 18px; }
.stat-label { color: var(--muted); font-size: 13px; font-weight: 650; }
.stat-value { margin-top: 8px; font-size: 30px; line-height: 1; font-weight: 760; letter-spacing: -.035em; }
.stat-note { color: var(--muted); font-size: 12px; margin-top: 10px; }

.toolbar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar-between { justify-content: space-between; }
.filter-grid { display: grid; grid-template-columns: repeat(6, minmax(120px, 1fr)); gap: 12px; align-items: end; }
.form-group { display: grid; gap: 6px; }
.form-group label { color: var(--muted); font-size: 12px; font-weight: 700; }
.input, .select, .textarea {
    width: 100%; border: 1px solid #ccd5df; border-radius: 9px; background: #fff; color: var(--text); padding: 10px 11px; outline: none;
}
.input:focus, .select:focus, .textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,111,237,.12); }
.textarea { min-height: 120px; resize: vertical; }
.checkbox { display: inline-flex; gap: 8px; align-items: center; }
.help { color: var(--muted); font-size: 12px; }

.btn { border: 0; border-radius: 9px; padding: 10px 14px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; cursor: pointer; font-weight: 700; line-height: 1.15; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-secondary { background: #e9eef5; color: #27364a; }
.btn-secondary:hover { background: #dfe6ef; color: #18212f; }
.btn-danger { background: #fce9e9; color: var(--danger); }
.btn-success { background: #e6f6ed; color: var(--success); }
.btn-sm { padding: 7px 10px; font-size: 13px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 11px; }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 12px 13px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { background: var(--surface-soft); color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; white-space: nowrap; }
td { font-size: 14px; }
tr:last-child td { border-bottom: 0; }
.product-cell { min-width: 270px; display: flex; gap: 11px; align-items: center; }
.product-thumb { width: 52px; height: 52px; border-radius: 9px; object-fit: cover; border: 1px solid var(--border); background: var(--surface-soft); }
.product-name { font-weight: 700; color: var(--text); display: block; }
.product-meta { color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }

.badge { display: inline-flex; align-items: center; border-radius: 999px; padding: 4px 9px; font-size: 11px; font-weight: 750; text-transform: uppercase; letter-spacing: .035em; }
.badge-success { color: var(--success); background: #e8f7ef; }
.badge-danger { color: var(--danger); background: #fceaea; }
.badge-info { color: var(--info); background: #e6f5fa; }
.badge-muted { color: #5f6b7c; background: #edf0f4; }

.alert { border-radius: 10px; padding: 12px 14px; margin: 0 0 18px; border: 1px solid transparent; }
.alert-success { color: #12683a; background: #e9f8ef; border-color: #bfe7cf; }
.alert-error, .alert-danger { color: #9e2929; background: #fcecec; border-color: #f0c2c2; }
.alert-warning { color: #855000; background: #fff5dd; border-color: #f1d18e; }
.alert-info { color: #155b71; background: #e9f7fb; border-color: #b8e2ef; }

.pagination { display: flex; gap: 6px; margin-top: 16px; flex-wrap: wrap; }
.pagination a, .pagination span { min-width: 36px; padding: 8px 10px; text-align: center; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text); }
.pagination .current { color: #fff; background: var(--primary); border-color: var(--primary); }
.empty-state { padding: 42px 20px; text-align: center; color: var(--muted); }

.definition-grid { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 0; }
.definition-grid dt, .definition-grid dd { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--border); }
.definition-grid dt { color: var(--muted); font-size: 13px; font-weight: 650; }
.definition-grid dd { overflow-wrap: anywhere; }
.product-hero { display: grid; grid-template-columns: 220px minmax(0,1fr); gap: 22px; }
.product-image-large { width: 100%; aspect-ratio: 1; object-fit: contain; background: var(--surface-soft); border: 1px solid var(--border); border-radius: 12px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.muted { color: var(--muted); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.code-block { white-space: pre-wrap; overflow-wrap: anywhere; padding: 14px; border-radius: 10px; background: #101827; color: #dce6f4; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12px; max-height: 520px; overflow: auto; }
.bar-list { display: grid; gap: 10px; }
.bar-row { display: grid; grid-template-columns: minmax(110px, 180px) 1fr 70px; gap: 12px; align-items: center; font-size: 13px; }
.bar-track { height: 9px; background: #edf1f5; border-radius: 999px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--primary); border-radius: inherit; }

.login-page { min-height: 100vh; display: grid; place-items: center; padding: 24px; background: linear-gradient(145deg, #13213a, #284875); }
.login-card { width: min(430px, 100%); background: #fff; border-radius: 18px; padding: 30px; box-shadow: 0 30px 80px rgba(0,0,0,.25); }
.login-card h1 { margin: 0 0 6px; }
.login-card .brand-mark { margin-bottom: 18px; color: #fff; }
.login-form { display: grid; gap: 15px; margin-top: 24px; }

@media (max-width: 1050px) {
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .filter-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
}
@media (max-width: 760px) {
    .app-shell { display: block; }
    .sidebar { position: static; height: auto; padding: 15px; }
    .brand { margin-bottom: 14px; }
    .nav { display: flex; overflow-x: auto; padding-bottom: 4px; }
    .nav-link { white-space: nowrap; }
    .sidebar-footer { margin-top: 14px; }
    .main-content { padding: 22px 15px; }
    .grid-2, .grid-3, .grid-4, .product-hero { grid-template-columns: 1fr; }
    .filter-grid { grid-template-columns: 1fr 1fr; }
    .definition-grid { grid-template-columns: 1fr; }
    .definition-grid dt { border-bottom: 0; padding-bottom: 2px; }
    .definition-grid dd { padding-top: 2px; }
}
@media (max-width: 480px) {
    .filter-grid { grid-template-columns: 1fr; }
    .page-footer { display: grid; gap: 5px; }
}