:root {
    --bg: #f3f5f7;
    --panel: #ffffff;
    --panel-2: #eef2f6;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #d1d5db;
    --primary: #1f5eff;
    --primary-text: #ffffff;
    --danger: #b42318;
    --success: #067647;
    --warning: #b54708;
    --shadow: 0 10px 25px rgba(0,0,0,.08);
}

html[data-theme="dark"] {
    --bg: #111827;
    --panel: #1f2937;
    --panel-2: #273447;
    --text: #f9fafb;
    --muted: #9ca3af;
    --border: #374151;
    --primary: #5b8cff;
    --primary-text: #ffffff;
    --danger: #f97066;
    --success: #47cd89;
    --warning: #f79009;
    --shadow: 0 10px 25px rgba(0,0,0,.25);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
}

a {
    color: var(--primary);
    text-decoration: none;
}

.page-shell {
    max-width: 1440px;
    margin: 0 auto;
    padding: 16px;
}

.site-header,
.site-footer,
.main-nav,
.card,
.alert {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow);
}

.site-header,
.main-nav,
.site-footer,
.card {
    padding: 16px;
}

.site-header {
    margin-bottom: 12px;
}

.site-header-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
}

.site-header h1 {
    margin: 0;
}

.subline,
.muted {
    color: var(--muted);
}

.site-header-right,
.header-actions,
.inline-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.main-nav {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.content {
    display: grid;
    gap: 16px;
}

.card h2,
.card h3 {
    margin-top: 0;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.project-grid {
    display: grid;
    gap: 12px;
}

.project-card {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 14px;
    background: var(--panel-2);
}

.project-card-head {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    font-weight: 700;
}

label {
    display: block;
    font-weight: 700;
    margin-bottom: 6px;
}

input,
select,
textarea,
button {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--panel);
    color: var(--text);
}

input[type="checkbox"] {
    width: auto;
}

button,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: var(--primary);
    color: var(--primary-text);
    font-weight: 700;
}

button:disabled,
input:disabled,
select:disabled {
    cursor: not-allowed;
    opacity: .65;
}

.btn.secondary,
button.secondary {
    background: var(--panel-2);
    color: var(--text);
}

.btn.small {
    width: auto;
    padding: 8px 12px;
}

.auth-box {
    max-width: 680px;
}

.alert {
    padding: 12px 14px;
}

.alert.error {
    border-left: 5px solid var(--danger);
}

.alert.success {
    border-left: 5px solid var(--success);
}

.alert.warning {
    border-left: 5px solid var(--warning);
}

.table-wrap {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    min-width: 960px;
}

.table th,
.table td {
    border-bottom: 1px solid var(--border);
    padding: 10px;
    vertical-align: top;
    text-align: left;
}

.table th {
    background: var(--panel-2);
}

.pill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pill {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 6px 10px;
    background: var(--panel-2);
    color: var(--text);
    font-size: 0.9rem;
}

.price {
    font-weight: 700;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.checkbox-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    font-weight: 700;
}

.checkbox-line {
    min-height: 42px;
}

.split-fields {
    display: grid;
    grid-template-columns: minmax(82px, .65fr) minmax(112px, 1fr);
    gap: 8px;
}

.computed-output {
    display: flex;
    align-items: center;
    min-height: 42px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--panel-2);
    font-weight: 700;
}

.customer-edit-grid {
    display: grid;
    grid-template-columns: minmax(220px, 1.4fr) minmax(160px, .8fr) minmax(210px, 1fr) minmax(150px, .8fr) minmax(130px, .7fr);
    gap: 12px;
    align-items: end;
}

.product-table {
    display: grid;
    gap: 8px;
    margin-top: 16px;
}

.product-row {
    display: grid;
    grid-template-columns: minmax(160px, 1.2fr) minmax(120px, .7fr) minmax(150px, .8fr) minmax(150px, .8fr);
    gap: 10px;
    align-items: center;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--panel);
}

.product-head {
    background: var(--panel-2);
    font-weight: 700;
}

.customer-accordion-list {
    display: grid;
    gap: 8px;
}

.customer-row {
    display: grid;
    grid-template-columns: minmax(220px, 1.4fr) minmax(140px, .8fr) minmax(130px, .8fr) minmax(130px, .8fr) minmax(110px, .7fr) minmax(140px, .8fr);
    gap: 10px;
    align-items: center;
    width: 100%;
}

.customer-row-head {
    padding: 10px;
    border-radius: 8px;
    background: var(--panel-2);
    font-weight: 700;
}

.customer-accordion {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--panel);
}

.customer-accordion.open {
    box-shadow: 0 8px 24px rgba(0,0,0,.14);
}

.customer-accordion-header {
    padding: 12px;
    border: 0;
    border-radius: 0;
    background: var(--panel);
    color: var(--text);
    text-align: left;
}

.customer-accordion-header small {
    display: block;
    margin-top: 4px;
    color: var(--muted);
    font-weight: 400;
}

.customer-accordion-content {
    display: none;
    padding: 16px;
    border-top: 1px solid var(--border);
}

.customer-accordion.open .customer-accordion-content {
    display: block;
}

.admin-users-table input + input {
    margin-top: 8px;
}

.audit-table {
    min-width: 1180px;
}

.audit-json {
    max-width: 360px;
    max-height: 220px;
    margin: 0;
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-word;
    font-family: Consolas, "Courier New", monospace;
    font-size: .82rem;
}

@media (max-width: 900px) {
    .site-header-main {
        flex-direction: column;
    }

    .site-header-right {
        justify-content: flex-start;
    }

    .customer-edit-grid,
    .product-row,
    .customer-row {
        grid-template-columns: 1fr;
    }

    .customer-row-head {
        display: none;
    }
}

@media (max-width: 640px) {
    .page-shell {
        padding: 12px;
    }

    .site-header,
    .main-nav,
    .site-footer,
    .card {
        padding: 12px;
    }
}