:root {
    --bg: #f6f7f9;
    --panel: #ffffff;
    --line: #d9dde3;
    --text: #1f2933;
    --muted: #667085;
    --accent: #2C9096;
    --accent-dark: #1f6f74;
    --nav-bg: #eef9fa;
    --nav-link: #1f6f74;
    --danger: #b42318;
    --warning-bg: #fff7e6;
    --input-bg: #ffffff;
    --soft-bg: #f8fafc;
    --thumb-bg: #f2f4f7;
    --chip-bg: #ecfeff;
    --chip-border: #b8e6e9;
    --action-bg: #eef9fa;
    --message-bg: #eef7f3;
    --message-border: #b7ddcf;
    --badge-bg: #ecfdf3;
    color-scheme: light;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

.topbar {
    align-items: center;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--chip-border);
    color: var(--text);
    display: flex;
    gap: 18px;
    min-height: 60px;
    padding: 0 24px;
}

.brand {
    align-items: center;
    color: var(--text);
    display: flex;
    font-size: 18px;
    font-weight: 700;
    height: 52px;
    white-space: nowrap;
}

.brand img {
    display: block;
    height: 42px;
    max-width: 180px;
    object-fit: contain;
}

.nav {
    display: flex;
    flex: 1;
    gap: 12px;
    overflow-x: auto;
}

.nav a {
    color: var(--nav-link);
    font-size: 14px;
    white-space: nowrap;
}

.mobile-quick-nav,
.mobile-menu {
    display: none;
}

.search input {
    border: 1px solid #4fb2b7;
    border-radius: 6px;
    background: var(--input-bg);
    color: var(--text);
    min-width: 180px;
    padding: 8px 10px;
}

.link-button {
    background: transparent;
    border: 0;
    color: var(--accent-dark);
    cursor: pointer;
}

.management-menu {
    position: relative;
}

.management-menu summary {
    color: var(--accent-dark);
    cursor: pointer;
    font-size: 14px;
    list-style: none;
    white-space: nowrap;
}

.management-menu summary::-webkit-details-marker {
    display: none;
}

.management-menu summary::after {
    content: " ▾";
    color: var(--muted);
}

.management-menu div {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.12);
    display: grid;
    gap: 4px;
    min-width: 160px;
    padding: 8px;
    position: absolute;
    right: 0;
    top: 28px;
    z-index: 20;
}

.management-menu:not([open]) div {
    display: none;
}

.management-menu a {
    border-radius: 6px;
    color: var(--text);
    padding: 8px 10px;
    white-space: nowrap;
}

.management-menu a:hover {
    background: var(--action-bg);
}

.container {
    margin: 0 auto;
    max-width: 1280px;
    padding: 28px 24px 48px;
}

.page-title {
    margin-bottom: 20px;
}

.page-title h1,
.panel h1,
.panel h2 {
    margin: 0;
}

.page-title p {
    color: var(--muted);
    margin: 8px 0 0;
}

.stats {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-bottom: 18px;
}

.stat,
.panel,
.login-panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.stat {
    color: var(--text);
    display: block;
    padding: 18px;
}

.stat strong {
    display: block;
    font-size: 28px;
}

.stat span {
    color: var(--muted);
}

.stat.warning {
    background: var(--warning-bg);
}

.grid {
    display: grid;
    gap: 18px;
}

.grid.two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel,
.login-panel {
    padding: 20px;
}

.panel-header {
    align-items: center;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 16px;
}

.header-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
}

table {
    border-collapse: collapse;
    width: 100%;
}

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

.wide-table {
    min-width: 1320px;
}

.inventory-balance-table {
    table-layout: fixed;
}

.inventory-balance-table .material-name-cell {
    width: 22%;
}

.inventory-balance-table .spec-cell {
    overflow-wrap: anywhere;
    width: 38%;
}

.inventory-balance-table th,
.inventory-balance-table td {
    word-break: keep-all;
}

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

th {
    color: var(--muted);
    font-size: 13px;
    font-weight: 600;
}

.empty {
    color: var(--muted);
    text-align: center;
}

.material-thumb {
    align-items: center;
    background: var(--thumb-bg);
    border: 1px solid var(--line);
    border-radius: 6px;
    display: flex;
    height: 58px;
    justify-content: center;
    overflow: hidden;
    width: 86px;
}

.material-thumb img {
    height: 100%;
    object-fit: contain;
    width: 100%;
}

.material-thumb a {
    align-items: center;
    color: var(--muted);
    display: flex;
    height: 100%;
    justify-content: center;
    width: 100%;
}

.daily-qty {
    display: grid;
    gap: 4px;
    min-width: 220px;
}

.daily-qty span {
    display: flex;
    justify-content: space-between;
    gap: 8px;
}

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

.part-filter {
    border-bottom: 1px solid var(--line);
    margin: -4px 0 16px;
    padding-bottom: 14px;
}

.part-filter summary {
    color: var(--text);
    cursor: pointer;
    font-weight: 700;
    margin-bottom: 10px;
}

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

.part-filter-list a,
.part-chip {
    border: 1px solid var(--line);
    border-radius: 999px;
    display: inline-block;
    font-size: 13px;
    line-height: 1;
    padding: 7px 10px;
    white-space: nowrap;
}

.part-filter-list a {
    background: var(--panel);
    color: var(--text);
}

.part-filter-list a.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.part-chip {
    background: var(--chip-bg);
    border-color: var(--chip-border);
    color: var(--accent-dark);
    margin: 0 4px 4px 0;
}

.filter-panel {
    border-bottom: 1px solid var(--line);
    display: grid;
    gap: 14px;
    margin: -4px 0 16px;
    padding-bottom: 16px;
}

.filter-panel .part-filter {
    border-bottom: 0;
    margin: 0;
    padding-bottom: 0;
}

.filter-row {
    display: grid;
    gap: 8px;
}

.filter-label {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.date-range-form {
    align-items: end;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.date-range-form label {
    display: grid;
    gap: 5px;
    min-width: 150px;
}

.date-range-form span {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.date-range-form input {
    background: var(--input-bg);
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--text);
    font: inherit;
    padding: 8px 10px;
}

.chart-wrap {
    display: grid;
    gap: 12px;
    margin: 16px 0 20px;
    overflow-x: auto;
}

.production-chart {
    display: block;
    min-width: 760px;
    width: 100%;
}

.chart-bg {
    fill: var(--soft-bg);
    stroke: var(--line);
}

.chart-grid {
    stroke: #e5e7eb;
    stroke-width: 1;
}

.chart-axis {
    stroke: var(--line);
    stroke-width: 1.5;
}

.chart-label {
    fill: var(--muted);
    font-size: 12px;
}

.chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 14px;
}

.chart-legend span {
    align-items: center;
    color: var(--text);
    display: inline-flex;
    font-size: 13px;
    gap: 6px;
}

.chart-legend i {
    border-radius: 999px;
    display: inline-block;
    height: 10px;
    width: 10px;
}

.chart-empty {
    background: var(--soft-bg);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 32px 12px;
}

.inbound-grid {
    display: grid;
    gap: 6px;
    grid-template-columns: repeat(5, minmax(54px, 1fr));
    min-width: 340px;
}

.inbound-grid span {
    background: var(--soft-bg);
    border: 1px solid var(--line);
    border-radius: 6px;
    display: grid;
    gap: 4px;
    min-height: 48px;
    padding: 6px;
    text-align: center;
}

.inbound-grid em {
    color: var(--muted);
    font-size: 12px;
    font-style: normal;
}

.inbound-grid strong {
    color: var(--text);
    font-size: 14px;
}

.inbound-grid .empty-cell {
    align-items: center;
    color: var(--muted);
    display: flex;
    grid-column: 1 / -1;
    justify-content: center;
}

.action-column {
    min-width: 84px;
    text-align: center;
    white-space: nowrap;
    width: 84px;
    word-break: keep-all;
    writing-mode: horizontal-tb;
}

.table-action {
    align-items: center;
    background: var(--action-bg);
    border: 1px solid var(--chip-border);
    border-radius: 6px;
    color: var(--accent-dark);
    display: inline-flex;
    justify-content: center;
    min-width: 48px;
    padding: 7px 10px;
    white-space: nowrap;
    word-break: keep-all;
}

.table-actions {
    display: flex;
    gap: 6px;
    white-space: nowrap;
}

.danger-action {
    background: #fff1f0;
    border-color: #f3aaa4;
    color: var(--danger);
}

.delete-form {
    display: flex;
    gap: 8px;
    margin-top: 18px;
}

.danger-button {
    background: var(--danger);
}

.image-modal-row {
    display: none;
}

.image-modal-row:target {
    display: table-row;
}

.standalone-modal {
    display: none;
}

.standalone-modal:target {
    display: block;
}

.modal-backdrop {
    background: rgba(15, 23, 42, 0.58);
    bottom: 0;
    left: 0;
    position: fixed;
    right: 0;
    top: 0;
    z-index: 10;
}

.image-modal {
    background: var(--panel);
    border-radius: 8px;
    left: 50%;
    max-height: 86vh;
    max-width: 900px;
    overflow: auto;
    padding: 18px;
    position: fixed;
    top: 50%;
    transform: translate(-50%, -50%);
    width: min(90vw, 900px);
    z-index: 11;
}

.image-modal img {
    display: block;
    margin: 0 auto;
    max-height: 72vh;
    max-width: 100%;
    object-fit: contain;
}

.modal-header {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin-bottom: 14px;
}

.positive {
    color: var(--accent);
}

.negative,
.danger {
    color: var(--danger);
}

.badge {
    background: var(--badge-bg);
    border-radius: 999px;
    color: var(--accent-dark);
    display: inline-block;
    font-size: 12px;
    padding: 3px 8px;
}

.badge.danger {
    background: #fef3f2;
}

.badge.shortage-badge {
    background: #ffedd5;
    color: #c2410c;
}

.badge.bottleneck-badge {
    background: #fef3c7;
    color: #92400e;
}

.button,
button {
    background: var(--accent);
    border: 0;
    border-radius: 6px;
    color: #fff;
    cursor: pointer;
    display: inline-block;
    font-size: 14px;
    padding: 9px 12px;
}

.button.secondary {
    background: var(--action-bg);
    border: 1px solid var(--chip-border);
    color: var(--accent-dark);
}

button:hover,
.button:hover {
    background: var(--accent-dark);
    color: #fff;
}

.form {
    display: grid;
    gap: 14px;
    max-width: 720px;
}

.form label {
    display: grid;
    gap: 6px;
}

.form-field {
    display: grid;
    gap: 6px;
}

.form input,
.form select,
.form textarea,
.inline-form select {
    background: var(--input-bg);
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--text);
    font: inherit;
    padding: 9px 10px;
    width: 100%;
}

.checkbox-field input {
    width: auto;
}

.checkbox-field > div {
    display: grid;
    gap: 8px;
}

.checkbox-field > div label {
    align-items: center;
    display: flex;
    gap: 8px;
}

.user-form-note {
    background: var(--action-bg);
    border: 1px solid var(--chip-border);
    border-radius: 6px;
    margin-bottom: 16px;
    padding: 10px 12px;
}

.user-role-summary {
    border-bottom: 1px solid var(--line);
    margin-bottom: 16px;
    padding-bottom: 14px;
}

.actions {
    margin-top: 8px;
}

.inline-form {
    align-items: center;
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

.pagination {
    align-items: center;
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 16px;
}

.result {
    background: var(--message-bg);
    border-left: 4px solid var(--accent);
    padding: 12px;
}

.messages {
    display: grid;
    gap: 8px;
    margin-bottom: 16px;
}

.message {
    background: var(--message-bg);
    border: 1px solid var(--message-border);
    border-radius: 6px;
    padding: 10px 12px;
}

.login-panel {
    margin: 80px auto 0;
    max-width: 420px;
}

.list {
    line-height: 1.8;
    margin: 0;
    padding-left: 18px;
}

.detail-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: 280px minmax(0, 1fr);
}

.detail-media {
    align-items: center;
    background: var(--thumb-bg);
    border: 1px solid var(--line);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    min-height: 220px;
    overflow: hidden;
}

.detail-media img {
    display: block;
    max-height: 260px;
    max-width: 100%;
    object-fit: contain;
}

.detail-list {
    display: grid;
    gap: 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 0;
}

.detail-list div {
    border-bottom: 1px solid var(--line);
    display: grid;
    gap: 6px;
    padding: 12px;
}

.detail-list dt {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.detail-list dd {
    margin: 0;
}

.detail-sections {
    margin: 18px 0;
}

.detail-inbound {
    min-width: 0;
}

.production-card-grid {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.production-card {
    background: var(--action-bg);
    border: 1px solid var(--chip-border);
    border-radius: 8px;
    color: var(--text);
    display: grid;
    gap: 6px;
    min-height: 92px;
    padding: 12px;
}

.production-card:hover,
.production-card.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(44, 144, 150, 0.18);
}

.production-card.short {
    background: #fff1f0;
    border-color: #f3aaa4;
}

.production-card .card-title {
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.production-card .card-main {
    align-items: baseline;
    display: flex;
    gap: 8px;
}

.production-card .card-main span {
    color: var(--muted);
    font-size: 12px;
}

.production-card strong {
    color: var(--text);
    font-size: 24px;
    line-height: 1;
}

.production-card.short strong {
    color: var(--danger);
}

.production-card .card-meta {
    color: var(--muted);
    font-size: 12px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.simulation-detail-table {
    min-width: 980px;
}

.bottleneck-row {
    background: #fffbeb;
}

.shortage-row {
    background: #fff7ed;
}

.shortage-row td {
    border-bottom-color: #fed7aa;
}

@media (max-width: 900px) {
    .topbar {
        align-items: center;
        display: grid;
        gap: 12px;
        grid-template-columns: auto 1fr auto;
        min-height: 0;
        padding: 12px 14px;
        position: sticky;
        top: 0;
        z-index: 30;
    }

    .brand {
        height: auto;
    }

    .brand img {
        height: 34px;
        max-width: 144px;
    }

    .topbar > .nav,
    .topbar > .search,
    .topbar > .management-menu,
    .topbar > form:not(.mobile-search) {
        display: none;
    }

    .mobile-quick-nav {
        display: flex;
        gap: 6px;
        justify-content: flex-end;
        min-width: 0;
        overflow-x: auto;
    }

    .mobile-quick-nav a {
        background: var(--panel);
        border: 1px solid var(--chip-border);
        border-radius: 999px;
        color: var(--accent-dark);
        flex: 0 0 auto;
        font-size: 13px;
        line-height: 1;
        padding: 8px 10px;
        white-space: nowrap;
    }

    .mobile-menu {
        display: block;
        position: relative;
    }

    .mobile-menu summary {
        align-items: center;
        background: var(--accent);
        border-radius: 6px;
        color: #fff;
        cursor: pointer;
        display: flex;
        font-size: 20px;
        height: 36px;
        justify-content: center;
        line-height: 1;
        list-style: none;
        width: 40px;
    }

    .mobile-menu summary::-webkit-details-marker {
        display: none;
    }

    .mobile-menu-panel {
        background: var(--panel);
        border: 1px solid var(--line);
        border-radius: 8px;
        box-shadow: 0 14px 30px rgba(15, 23, 42, 0.18);
        display: grid;
        gap: 12px;
        padding: 12px;
        position: absolute;
        right: 0;
        top: 44px;
        width: min(88vw, 340px);
        z-index: 40;
    }

    .mobile-menu:not([open]) .mobile-menu-panel {
        display: none;
    }

    .mobile-search input {
        background: var(--input-bg);
        border: 1px solid #4fb2b7;
        border-radius: 6px;
        color: var(--text);
        font: inherit;
        padding: 10px;
        width: 100%;
    }

    .mobile-menu nav {
        display: grid;
        gap: 4px;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .mobile-menu nav a {
        background: var(--soft-bg);
        border: 1px solid var(--line);
        border-radius: 6px;
        color: var(--text);
        font-size: 14px;
        padding: 10px;
    }

    .mobile-menu button {
        width: 100%;
    }

    .container {
        padding: 22px 14px 40px;
    }

    .stats,
    .grid.two,
    .grid.three,
    .detail-grid,
    .detail-list {
        grid-template-columns: 1fr;
    }

    .search input {
        min-width: 100%;
    }
}