:root {
    --primary: #6d28d9;
    --primary-dark: #4c1d95;
    --bg: #f6f7fb;
    --sidebar: #151827;
    --sidebar-soft: #24283a;
    --text: #111827;
    --muted: #6b7280;
    --border: #e5e7eb;
    --white: #ffffff;
    --danger: #dc2626;
    --success: #16a34a;
    --warning: #d97706;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }

.app-layout { min-height: 100vh; display: flex; }
.sidebar { width: 260px; background: var(--sidebar); color: var(--white); padding: 22px 16px; position: fixed; inset: 0 auto 0 0; }
.brand { display: flex; gap: 12px; align-items: center; padding: 8px 8px 24px; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; background: var(--primary); font-weight: 700; }
.brand strong { display: block; font-size: 17px; }
.brand small { color: #cbd5e1; }
.menu { display: grid; gap: 8px; }
.menu a { padding: 13px 14px; border-radius: 12px; color: #d1d5db; }
.menu a:hover, .menu a.active { background: var(--sidebar-soft); color: var(--white); }

.content { margin-left: 260px; padding: 28px; width: calc(100% - 260px); }
.topbar { margin-bottom: 24px; display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.topbar h1 { margin: 0 0 6px; font-size: 28px; }
.topbar p { margin: 0; color: var(--muted); }

.card { background: var(--white); border: 1px solid var(--border); border-radius: 18px; padding: 20px; box-shadow: 0 10px 25px rgba(15, 23, 42, 0.04); margin-bottom: 20px; }
.cards-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-bottom: 20px; }
.metric-card span { display: block; color: var(--muted); margin-bottom: 12px; }
.metric-card strong { font-size: 26px; }
.metric-card.danger strong { color: var(--danger); }

.section-header { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 16px; }
.section-header h2 { margin: 0 0 4px; font-size: 20px; }
.section-header p { margin: 0; color: var(--muted); }
.filters { display: flex; gap: 10px; flex-wrap: wrap; }

.form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.form-grid.compact { grid-template-columns: 220px 220px auto; align-items: end; }
.form-group { display: grid; gap: 7px; }
.form-group label { font-weight: 700; font-size: 14px; }
.form-group small { color: var(--muted); }
.span-2 { grid-column: span 2; }
.span-3 { grid-column: span 3; }
input, select { width: 100%; border: 1px solid var(--border); border-radius: 12px; padding: 12px 13px; font-size: 15px; background: #fff; }
input:focus, select:focus { outline: 2px solid rgba(109, 40, 217, .16); border-color: var(--primary); }
.form-actions { display: flex; gap: 10px; align-items: end; }

.btn { border: 1px solid var(--border); background: var(--white); color: var(--text); border-radius: 12px; padding: 11px 15px; cursor: pointer; font-weight: 700; }
.btn.primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-dark); }
.btn.danger-outline { color: var(--danger); border-color: rgba(220, 38, 38, .35); }
.btn.small { padding: 7px 10px; font-size: 13px; }
.btn.large { padding: 14px 18px; }

.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 13px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
td { font-size: 14px; }
.badge { display: inline-flex; align-items: center; padding: 5px 9px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.badge.success { background: rgba(22, 163, 74, .12); color: var(--success); }
.badge.warning { background: rgba(217, 119, 6, .12); color: var(--warning); }
.badge.danger { background: rgba(220, 38, 38, .12); color: var(--danger); }
.badge.muted { background: #f3f4f6; color: var(--muted); }

.pdv-content { max-width: none; }
.pdv-card { min-height: calc(100vh - 120px); display: flex; flex-direction: column; }
.pdv-input-area { display: grid; gap: 8px; margin-bottom: 18px; }
.pdv-input-area input { font-size: 22px; padding: 16px; }
.pdv-footer { margin-top: auto; border-top: 1px solid var(--border); padding-top: 18px; display: grid; grid-template-columns: 220px 160px 1fr auto auto; gap: 14px; align-items: end; }
.pdv-total { text-align: right; }
.pdv-total span { display: block; color: var(--muted); }
.pdv-total strong { font-size: 32px; }
.qty-control { display: inline-flex; align-items: center; gap: 8px; }
.qty-control button { width: 28px; height: 28px; border-radius: 8px; border: 1px solid var(--border); background: #fff; cursor: pointer; }
.empty-row { color: var(--muted); text-align: center; padding: 24px; }

@media (max-width: 900px) {
    .app-layout { display: block; }
    .sidebar { position: static; width: 100%; }
    .menu { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .content { margin-left: 0; width: 100%; padding: 18px; }
    .cards-grid, .form-grid, .form-grid.compact { grid-template-columns: 1fr; }
    .span-2, .span-3 { grid-column: auto; }
    .section-header, .pdv-footer { grid-template-columns: 1fr; display: grid; }
    .pdv-total { text-align: left; }
}

.product-photo {
    display: block;
    object-fit: cover;
    background: #f3f4f6;
    border: 1px solid var(--border);
}

.product-photo.thumb {
    width: 52px;
    height: 52px;
    border-radius: 12px;
}

.product-photo.mini {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    flex: 0 0 auto;
}

.product-photo.preview {
    width: 120px;
    height: 120px;
    border-radius: 16px;
}

.photo-preview-box {
    align-content: start;
}

.product-cell {
    display: flex;
    align-items: center;
    gap: 10px;
}

.pdv-top-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) 360px;
    gap: 18px;
    margin-bottom: 18px;
    align-items: stretch;
}

.pdv-left-panel {
    display: grid;
    gap: 14px;
}

.pdv-product-preview {
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 16px;
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 14px;
    align-items: center;
    background: #fafafa;
}

.pdv-product-preview span {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .03em;
}

.pdv-product-preview h2 {
    margin: 6px 0;
    font-size: 20px;
}

.pdv-product-preview p {
    margin: 0;
    color: var(--muted);
    line-height: 1.35;
}

.pdv-photo {
    width: 130px;
    height: 130px;
    border-radius: 18px;
}

.search-results {
    display: grid;
    gap: 8px;
}

.search-result-item {
    width: 100%;
    border: 1px solid var(--border);
    background: #fff;
    border-radius: 12px;
    padding: 9px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    text-align: left;
}

.search-result-item:hover {
    border-color: var(--primary);
    background: rgba(109, 40, 217, .04);
}

.search-result-item strong,
.search-result-item small {
    display: block;
}

.search-result-item small {
    color: var(--muted);
    margin-top: 3px;
}

.search-empty {
    color: var(--muted);
    border: 1px dashed var(--border);
    border-radius: 12px;
    padding: 12px;
}

.client-box {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 14px;
    background: #fff;
    display: grid;
    gap: 12px;
}

.quick-client-grid {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 10px;
    align-items: end;
}

@media (max-width: 1100px) {
    .pdv-top-grid {
        grid-template-columns: 1fr;
    }

    .pdv-product-preview {
        grid-template-columns: 100px 1fr;
    }

    .pdv-photo {
        width: 100px;
        height: 100px;
    }

    .quick-client-grid {
        grid-template-columns: 1fr;
    }
}