:root {
    color-scheme: light;
    --background: #f6f7f9;
    --surface: #ffffff;
    --text: #1f2933;
    --muted: #667085;
    --line: #d7dde5;
    --primary: #166534;
    --primary-hover: #14532d;
    --danger: #b42318;
    --danger-bg: #fff1f0;
    --success: #067647;
    --success-bg: #ecfdf3;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font: 16px/1.5 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
    color: inherit;
}

.app-shell {
    width: min(1120px, calc(100% - 32px));
    margin: 32px auto;
}

.topbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 16px;
}

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

h1 {
    margin-bottom: 4px;
    font-size: 32px;
    line-height: 1.15;
}

h2 {
    font-size: 20px;
}

h3 {
    margin: 0 0 10px;
    font-size: 17px;
}

.topbar p,
.empty {
    color: var(--muted);
}

.main-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--line);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    border-bottom: 3px solid transparent;
    color: var(--muted);
    padding: 8px 12px;
    font-weight: 700;
    text-decoration: none;
}

.nav-link:hover {
    color: var(--text);
}

.nav-link.active {
    border-bottom-color: var(--primary);
    color: var(--primary);
}

.panel,
.login-box {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 1px 2px rgb(16 24 40 / 0.05);
}

.panel {
    margin-bottom: 20px;
    min-width: 0;
    padding: 24px;
}

.panel-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
}

.panel-heading h2 {
    margin-bottom: 4px;
}

.panel-heading p {
    margin-bottom: 0;
    color: var(--muted);
}

.inline-form {
    display: grid;
    grid-template-columns: 140px minmax(180px, 320px) max-content;
    align-items: end;
    gap: 12px;
}

label {
    display: block;
    font-weight: 650;
    color: #344054;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid #c9d2df;
    border-radius: 6px;
    padding: 8px 10px;
    font: inherit;
}

input,
select {
    height: 42px;
}

textarea {
    resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary);
    outline: 3px solid rgb(22 101 52 / 0.14);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    border: 1px solid var(--primary);
    border-radius: 6px;
    background: var(--primary);
    color: #fff;
    padding: 8px 14px;
    font: inherit;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.button:hover {
    background: var(--primary-hover);
}

.button.secondary {
    background: #fff;
    color: var(--primary);
}

.button.full {
    width: 100%;
    margin-top: 12px;
}

.button.compact {
    min-height: 34px;
    padding: 5px 10px;
    font-size: 14px;
}

.notice {
    margin-bottom: 16px;
    border-radius: 6px;
    padding: 12px 14px;
    font-weight: 650;
}

.notice.error {
    background: var(--danger-bg);
    color: var(--danger);
}

.notice.success {
    background: var(--success-bg);
    color: var(--success);
}

.search-form {
    display: grid;
    grid-template-columns: 80px minmax(220px, 1fr) max-content max-content;
    align-items: end;
    gap: 12px;
    margin-bottom: 18px;
}

.table-wrap {
    min-width: 0;
    overflow-x: auto;
}

.due-groups {
    display: grid;
    gap: 20px;
    min-width: 0;
}

.customer-group {
    padding-top: 16px;
    border-top: 1px solid var(--line);
    min-width: 0;
}

.customer-group:first-child {
    padding-top: 0;
    border-top: 0;
}

.customer-group h3 a {
    color: var(--primary);
    text-decoration: none;
}

.customer-group h3 a:hover {
    text-decoration: underline;
}

.customer-group-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 10px;
}

.customer-group-heading h3 {
    min-width: 0;
}

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

th,
td {
    border-bottom: 1px solid var(--line);
    padding: 12px 10px;
    text-align: left;
    white-space: nowrap;
}

th {
    color: #344054;
    font-size: 14px;
}

.table-link {
    display: block;
    color: var(--text);
    text-decoration: none;
}

.table-link:hover {
    color: var(--primary);
    text-decoration: underline;
}

.table-link.muted,
.subtle {
    color: var(--muted);
}

.description-period {
    display: block;
    margin-top: 4px;
}

.back-link {
    margin-bottom: 16px;
}

.back-link a {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
}

.back-link a:hover {
    text-decoration: underline;
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

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

.contract-form {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.form-row label {
    margin-bottom: 6px;
}

.span-2 {
    grid-column: span 2;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.existing-vouchers {
    display: grid;
    gap: 8px;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 12px;
}

.login-page {
    display: grid;
    min-height: 100vh;
    place-items: center;
    padding: 24px;
}

.login-box {
    width: min(420px, 100%);
    padding: 28px;
}

.login-box h1 {
    margin-bottom: 20px;
}

.login-box label {
    margin-top: 14px;
    margin-bottom: 6px;
}

@media (max-width: 720px) {
    .topbar,
    .inline-form,
    .panel-heading,
    .customer-group-heading,
    .search-form,
    .contract-form {
        display: block;
    }

    .main-nav {
        overflow-x: auto;
    }

    .topbar .button,
    .inline-form .button,
    .panel-heading .button,
    .customer-group-heading .button,
    .search-form .button,
    .form-actions .button {
        width: 100%;
        margin-top: 12px;
    }

    .detail-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        margin-bottom: 14px;
    }

    .span-2 {
        grid-column: auto;
    }
}