:root {
    --bg: #f6f8fb;
    --card: rgba(255, 255, 255, 0.94);
    --text: #111827;
    --muted: #6b7280;
    --border: rgba(148, 163, 184, 0.24);
    --shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
    --shadow-soft: 0 12px 30px rgba(15, 23, 42, 0.06);

    --primary: #2563eb;
    --primary-soft: #eff6ff;
    --danger: #ef4444;
    --success: #16a34a;
    --warning: #f59e0b;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 20% 10%, rgba(96, 165, 250, 0.16), transparent 26%),
        radial-gradient(circle at 80% 0%, rgba(45, 212, 191, 0.14), transparent 24%),
        linear-gradient(180deg, #f9fbff 0%, #f3f6fb 100%);
}

a {
    color: inherit;
}

/* 顶部栏 */

.topbar {
    height: 78px;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    display: grid;
    grid-template-columns: 310px minmax(300px, 1fr) auto;
    align-items: center;
    padding: 0 36px;
    gap: 28px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
}

.brand-logo-img {
    height: 42px;
    width: auto;
    object-fit: contain;
}

.brand-text {
    font-size: 22px;
    font-weight: 780;
    letter-spacing: 0.2px;
}

.search-box {
    max-width: 640px;
    height: 46px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.88);
    border-radius: 14px;
    display: flex;
    align-items: center;
    padding: 0 14px;
    gap: 10px;
    box-shadow: var(--shadow-soft);
}

.search-icon {
    color: #64748b;
    font-size: 24px;
    transform: rotate(-15deg);
}

.search-box input {
    border: 0;
    outline: 0;
    flex: 1;
    background: transparent;
    font-size: 14px;
    color: #64748b;
}

.shortcut {
    font-size: 13px;
    color: #64748b;
    border: 1px solid #dbe3ef;
    background: #f8fafc;
    border-radius: 9px;
    padding: 4px 9px;
}

.user-area {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 14px;
}

.lang-switch {
    position: relative;
    flex: 0 0 auto;
}

.lang-switch-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 38px;
    padding: 0 12px;
    border: 1px solid #dbe3ef;
    border-radius: 12px;
    background: white;
    color: #334155;
    box-shadow: var(--shadow-soft);
    font: inherit;
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
}

.lang-switch-trigger:hover,
.lang-switch.is-open .lang-switch-trigger {
    border-color: #bfdbfe;
    background: #f8fbff;
    color: #1d4ed8;
}

.lang-switch-trigger:focus-visible,
.lang-switch-option:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.22);
    outline-offset: 2px;
}

.lang-switch-chevron {
    width: 7px;
    height: 7px;
    margin-top: -3px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg);
    transition: transform 150ms ease;
}

.lang-switch.is-open .lang-switch-chevron,
.lang-switch:hover:not(.is-dismissed) .lang-switch-chevron,
.lang-switch:focus-within:not(.is-dismissed) .lang-switch-chevron {
    transform: rotate(225deg) translate(-2px, -2px);
}

.lang-switch-menu {
    position: absolute;
    z-index: 20;
    top: calc(100% + 8px);
    right: 0;
    display: none;
    width: 160px;
    padding: 6px;
    border: 1px solid #dbe3ef;
    border-radius: 13px;
    background: white;
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.12);
}

.lang-switch-menu::before {
    position: absolute;
    inset-inline: 0;
    top: -9px;
    height: 9px;
    content: "";
}

.lang-switch.is-open .lang-switch-menu,
.lang-switch:focus-within:not(.is-dismissed) .lang-switch-menu {
    display: block;
}

@media (hover: hover) {
    .lang-switch:hover:not(.is-dismissed) .lang-switch-menu {
        display: block;
    }
}

.lang-switch-menu form {
    margin: 0;
}

.lang-switch-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 38px;
    padding: 0 11px;
    border: 1px solid transparent;
    border-radius: 9px;
    background: transparent;
    color: #475569;
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
}

.lang-switch-option:hover {
    background: #f1f5f9;
    color: #1d4ed8;
}

.lang-switch-option.is-active {
    border-color: #bfdbfe;
    background: #eff6ff;
    color: #1d4ed8;
    font-weight: 750;
}

.lang-switch-option.is-active::after {
    content: "✓";
    font-size: 15px;
    font-weight: 800;
}

.notification {
    position: relative;
    font-size: 21px;
    color: #475569;
}

.notification-badge {
    position: absolute;
    top: -11px;
    right: -12px;
    width: 22px;
    height: 22px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    background: var(--danger);
    color: white;
    font-size: 12px;
    font-weight: 700;
    border: 2px solid white;
}

.avatar {
    width: 44px;
    height: 44px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    color: white;
    font-size: 18px;
    font-weight: 800;
    background: linear-gradient(135deg, #60a5fa, #2563eb);
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.26);
}

.user-name {
    font-weight: 720;
    line-height: 1.2;
}

.user-role {
    font-size: 12px;
    color: var(--muted);
    margin-top: 2px;
}

.admin-link {
    color: #475569;
    text-decoration: none;
    font-size: 13px;
    border: 1px solid #dbe3ef;
    border-radius: 999px;
    padding: 8px 12px;
    background: white;
}

/* 页面公共布局 */

.page {
    max-width: 1120px;
    margin: 0 auto;
    padding: 46px 24px 80px;
}

.portal-page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 24px;
    margin-bottom: 28px;
}

.portal-page-header h1 {
    margin: 0 0 8px;
    font-size: 30px;
    letter-spacing: -0.6px;
}

.portal-page-header p {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
}

.portal-header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 通用按钮 */

.portal-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 0 15px;
    border-radius: 12px;
    border: 1px solid #dbe3ef;
    background: white;
    color: #334155;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
    box-shadow: var(--shadow-soft);
}

.portal-button:hover {
    border-color: rgba(96, 165, 250, 0.5);
}

.portal-button.primary {
    background: #2563eb;
    color: white;
    border-color: #2563eb;
}

.portal-button.danger {
    background: #ef4444;
    color: white;
    border-color: #ef4444;
}

/* 通用卡片与面板 */

.portal-panel {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow-soft);
    padding: 22px;
}

.backorder-filter-panel {
    margin-bottom: 20px;
    padding: 16px;
}

.backorder-filter-form {
    display: grid;
    grid-template-columns:
        minmax(260px, 1.5fr)
        minmax(180px, 0.8fr)
        minmax(200px, 1fr)
        auto;
    align-items: center;
    gap: 10px;
}

.backorder-filter-form .portal-input {
    width: 100%;
    min-width: 0;
    min-height: 42px;
    padding: 0 13px;
    border: 1px solid #dbe3ef;
    border-radius: 12px;
    outline: none;
    background: white;
    color: #0f172a;
    font: inherit;
    font-size: 14px;
    transition:
        border-color 150ms ease,
        box-shadow 150ms ease;
}

.backorder-filter-form .portal-input::placeholder {
    color: #94a3b8;
}

.backorder-filter-form .portal-input:focus {
    border-color: rgba(37, 99, 235, 0.6);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.09);
}

.backorder-filter-form .portal-button {
    min-height: 42px;
    padding-inline: 20px;
    white-space: nowrap;
    box-shadow: none;
}

.portal-panel-title {
    margin: 0 0 14px;
    font-size: 18px;
    font-weight: 780;
}

/* 通用状态标签 */

.status-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 24px;
    padding: 0 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 760;
    background: #f1f5f9;
    color: #64748b;
}

.status-pill.success {
    background: #ecfdf5;
    color: #15803d;
}

.status-pill.warning {
    background: #fffbeb;
    color: #b45309;
}

.status-pill.danger {
    background: #fef2f2;
    color: #b91c1c;
}

.status-pill.info {
    background: #eff6ff;
    color: #1d4ed8;
}

/* 通用表格，之后 workflow / orders 会用 */

.portal-table-wrap {
    overflow: auto;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: white;
    box-shadow: var(--shadow-soft);
}

.portal-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.portal-table th {
    text-align: left;
    font-size: 12px;
    color: #64748b;
    font-weight: 780;
    background: #f8fafc;
    padding: 13px 16px;
    border-bottom: 1px solid #e5e7eb;
    white-space: nowrap;
}

.portal-table td {
    padding: 14px 16px;
    border-bottom: 1px solid #f1f5f9;
    vertical-align: middle;
}

.portal-table tr:last-child td {
    border-bottom: 0;
}

.portal-empty {
    padding: 46px 20px;
    text-align: center;
    color: var(--muted);
}

.portal-messages {
    display: grid;
    gap: 10px;
    margin-bottom: 22px;
}

.portal-message {
    padding: 13px 16px;
    border-radius: 14px;
    border: 1px solid #dbe3ef;
    background: white;
    color: #334155;
    font-size: 14px;
    font-weight: 650;
    box-shadow: var(--shadow-soft);
}

.portal-message.success {
    background: #ecfdf5;
    border-color: #bbf7d0;
    color: #15803d;
}

.portal-message.error {
    background: #fef2f2;
    border-color: #fecaca;
    color: #b91c1c;
}

.portal-message.warning {
    background: #fffbeb;
    border-color: #fde68a;
    color: #b45309;
}

.portal-message.info {
    background: #eff6ff;
    border-color: #bfdbfe;
    color: #1d4ed8;
}

/* 响应式 */

@media (max-width: 1180px) {
    .topbar {
        grid-template-columns: 260px 1fr auto;
        padding: 0 22px;
    }
}

@media (max-width: 880px) {
    .topbar {
        height: auto;
        grid-template-columns: 1fr;
        padding: 18px;
        gap: 14px;
    }

    .search-box {
        max-width: none;
    }

    .user-area {
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .portal-page-header {
        align-items: flex-start;
        flex-direction: column;
    }

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

@media (max-width: 560px) {
    .backorder-filter-form {
        grid-template-columns: 1fr;
    }

    .backorder-filter-form .portal-button {
        width: 100%;
    }
}