:root {
    color-scheme: light;
    --ink: #202124;
    --muted: #63676f;
    --line: #d8dbe0;
    --paper: #ffffff;
    --wash: #f5f7f8;
    --blue: #1769aa;
    --green: #287b52;
    --red: #a63434;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--wash);
    color: var(--ink);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
}

.topbar {
    align-items: center;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    display: flex;
    gap: 18px;
    min-height: 72px;
    padding: 12px 22px;
    position: sticky;
    top: 0;
    z-index: 2;
}

.brand {
    align-items: center;
    display: flex;
    gap: 10px;
    min-width: 150px;
}

.brand img {
    height: 44px;
    max-width: 120px;
    object-fit: contain;
}

nav {
    display: flex;
    flex: 1;
    flex-wrap: wrap;
    gap: 8px;
}

a,
button,
.button {
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--ink);
    cursor: pointer;
    display: inline-flex;
    font: inherit;
    min-height: 42px;
    padding: 10px 14px;
    text-decoration: none;
    background: var(--paper);
    align-items: center;
    justify-content: center;
}

a.active,
button.primary,
.button.primary {
    background: var(--blue);
    border-color: var(--blue);
    color: #fff;
}

button.danger {
    color: var(--red);
}

.langs {
    display: flex;
    gap: 6px;
}

.langs a {
    min-height: 34px;
    padding: 7px 10px;
}

main {
    margin: 0 auto;
    max-width: 1120px;
    padding: 24px;
}

.panel {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    margin-bottom: 18px;
    padding: 22px;
}

h1 {
    font-size: 26px;
    margin: 0 0 18px;
}

p {
    color: var(--muted);
    margin: 4px 0 0;
}

.title-row,
.actions,
.line-actions {
    align-items: center;
    display: flex;
    gap: 10px;
    justify-content: space-between;
}

.grid-form {
    display: grid;
    gap: 14px;
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

label {
    color: var(--muted);
    display: grid;
    gap: 6px;
    font-size: 14px;
    margin: 12px 0;
}

label.wide {
    grid-column: 1 / -1;
}

input,
select,
textarea {
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--ink);
    font: inherit;
    min-height: 44px;
    padding: 10px 12px;
    width: 100%;
}

textarea {
    min-height: 92px;
    resize: vertical;
}

.notice {
    background: #eaf6ef;
    border: 1px solid #b8ddc8;
    border-radius: 8px;
    color: #1f6645;
    margin-bottom: 18px;
    padding: 12px 14px;
}

.list {
    display: grid;
    gap: 10px;
}

.list article {
    align-items: center;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    display: grid;
    gap: 10px;
    grid-template-columns: 1fr auto auto auto;
    padding: 14px;
}

.copy-form {
    display: grid;
    gap: 14px;
    margin-top: 20px;
}

.checkline {
    align-items: center;
    background: #fafafa;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    display: flex;
    gap: 14px;
    margin: 0;
    padding: 16px;
}

.checkline input {
    height: 24px;
    min-height: 24px;
    width: 24px;
}

small {
    color: var(--muted);
    display: block;
    margin-top: 4px;
}

.invoice-item {
    border: 1px solid var(--line);
    border-radius: 8px;
    margin: 16px 0;
    padding: 16px;
}

.item-grid,
.mini-grid {
    display: grid;
    gap: 10px;
    grid-template-columns: 1.2fr 2fr .7fr .7fr auto;
}

.mini-grid {
    grid-template-columns: 1fr 1fr 1fr 1fr auto;
    margin-top: 10px;
}

.subbox {
    background: #fafafa;
    border: 1px solid var(--line);
    border-radius: 8px;
    margin-top: 12px;
    padding: 12px;
}

.subbox h3 {
    font-size: 16px;
    margin: 0 0 8px;
}

.totals {
    display: grid;
    gap: 8px;
    justify-content: end;
    margin: 18px 0;
    text-align: right;
}

.totals strong {
    font-size: 22px;
}

@media (max-width: 820px) {
    .topbar,
    .title-row,
    .actions {
        align-items: stretch;
        flex-direction: column;
    }

    nav,
    .langs {
        width: 100%;
    }

    nav a,
    .langs a {
        flex: 1;
    }

    main {
        padding: 14px;
    }

    .grid-form,
    .item-grid,
    .mini-grid,
    .list article {
        grid-template-columns: 1fr;
    }
}