:root {
    --ink: #172026;
    --muted: #65717a;
    --line: #d8dee3;
    --panel: #ffffff;
    --page: #f4f6f7;
    --accent: #146c6c;
    --accent-strong: #0d5555;
    --warn: #b54708;
    --warn-bg: #fff1df;
    --ok-bg: #eaf7f0;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--page);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 15px;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 5;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    padding: 12px 18px;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
}

.topbar strong {
    display: block;
    font-size: 18px;
}

.topbar span,
.page-head p,
.empty,
small {
    color: var(--muted);
}

nav {
    display: flex;
    gap: 8px;
    overflow-x: auto;
}

nav a,
.settings-menu a,
.cancel-edit {
    color: var(--ink);
    text-decoration: none;
    white-space: nowrap;
    padding: 9px 11px;
    border: 1px solid transparent;
    border-radius: 6px;
}

nav a.active,
.settings-menu a.active {
    color: #ffffff;
    background: var(--accent);
}

main {
    width: min(1240px, calc(100% - 24px));
    margin: 18px auto 48px;
}

.notice {
    margin-bottom: 14px;
    padding: 12px 14px;
    border-left: 4px solid var(--accent);
    background: var(--ok-bg);
    border-radius: 4px;
}

.page-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 16px;
    margin: 8px 0 16px;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    font-size: 28px;
    margin-bottom: 4px;
}

h2 {
    font-size: 18px;
}

.breadcrumb {
    margin-bottom: 14px;
    padding: 10px 12px;
    color: var(--muted);
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 6px;
}

.grid {
    display: grid;
    gap: 14px;
}

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

.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 14px;
}

.stack,
.settings-form {
    display: grid;
    gap: 10px;
}

.inline-form,
.line-item {
    display: flex;
    gap: 8px;
    align-items: center;
}

input,
select,
textarea,
button {
    width: 100%;
    min-height: 40px;
    border-radius: 6px;
    border: 1px solid var(--line);
    padding: 9px 10px;
    font: inherit;
    background: #ffffff;
}

textarea {
    min-height: 76px;
    resize: vertical;
}

button {
    cursor: pointer;
    color: #ffffff;
    background: var(--accent);
    border-color: var(--accent);
    font-weight: 700;
}

button:hover {
    background: var(--accent-strong);
}

.segmented {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.segmented label {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 9px 10px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #fafbfb;
}

.segmented input,
.settings-form input[type="checkbox"] {
    width: auto;
    min-height: auto;
}

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

th,
td {
    text-align: left;
    padding: 10px 8px;
    border-bottom: 1px solid var(--line);
    vertical-align: top;
}

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

tbody tr {
    background: #ffffff;
}

tbody tr:hover {
    background: #f7faf9;
}

.stock-list,
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 10px;
}

.stock-card,
.stats div {
    display: grid;
    gap: 6px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #ffffff;
}

.stock-card span,
.stats strong {
    font-size: 24px;
    font-weight: 800;
}

.stock-card.low {
    border-color: #f3ba72;
    background: var(--warn-bg);
}

.stock-card.low small {
    color: var(--warn);
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(145px, 1fr));
    gap: 8px;
    margin: 12px 0 16px;
}

.timeline {
    display: grid;
    gap: 10px;
    padding-left: 20px;
}

.timeline li {
    padding-left: 4px;
}

.timeline span {
    display: block;
    color: var(--muted);
    font-size: 13px;
}

.timeline p {
    margin-bottom: 0;
}

.settings-layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 14px;
}

.settings-menu {
    display: grid;
    align-content: start;
    gap: 6px;
    padding: 8px;
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 8px;
}

.settings-form {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    align-items: end;
    margin-bottom: 18px;
}

.cancel-edit {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    border-color: var(--line);
    background: #f8faf9;
}

.settings-form label span {
    display: block;
    margin-bottom: 5px;
    color: var(--muted);
    font-size: 13px;
}

@media (max-width: 820px) {
    .topbar,
    .page-head,
    .inline-form,
    .line-item {
        align-items: stretch;
        flex-direction: column;
    }

    nav {
        width: 100%;
    }

    .grid.two,
    .settings-layout {
        grid-template-columns: 1fr;
    }

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

    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}