:root {
  --ink: #18242f;
  --muted: #667482;
  --surface: #ffffff;
  --page: #f4f7f8;
  --primary: #0c6d62;
  --primary-dark: #075148;
  --border: #dbe4e7;
  --focus: #f2a900;
}

* { box-sizing: border-box; }
body { background: var(--page); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, sans-serif; margin: 0; line-height: 1.5; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; }
button, .button-secondary, .button-danger { border: 0; border-radius: .5rem; cursor: pointer; display: inline-block; font-weight: 700; padding: .7rem 1rem; }
button { background: var(--primary); color: #fff; }
button:hover { background: var(--primary-dark); }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.shell { margin: 0 auto; max-width: 1180px; padding-left: 1.25rem; padding-right: 1.25rem; }
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-content { align-items: center; display: flex; justify-content: space-between; min-height: 4.5rem; }
.brand { color: var(--ink); font-size: 1.25rem; font-weight: 800; letter-spacing: -.02em; }
.header-actions, .header-actions nav { align-items: center; display: flex; gap: 1rem; }
.header-actions select { background: var(--surface); border: 1px solid var(--border); border-radius: .35rem; color: var(--ink); padding: .35rem; }
.link-button { background: transparent; color: var(--primary); padding: 0; }
.link-button:hover { background: transparent; text-decoration: underline; }
.skip-link { background: var(--ink); color: #fff; left: 1rem; padding: .6rem .9rem; position: absolute; top: -4rem; z-index: 10; }
.skip-link:focus { top: 1rem; }
.language-submit { padding: .35rem .6rem; }
.page-content { padding-bottom: 3rem; padding-top: 2.5rem; }
.page-heading { align-items: flex-start; display: flex; gap: 1rem; justify-content: space-between; margin-bottom: 2rem; }
.page-heading h1, .auth-card h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); letter-spacing: -.03em; line-height: 1.1; margin: 0 0 .75rem; }
.page-heading p { color: var(--muted); margin: 0; max-width: 42rem; }
.eyebrow { color: var(--primary) !important; font-size: .8rem; font-weight: 800; letter-spacing: .08em; margin-bottom: .5rem !important; text-transform: uppercase; }
.button-secondary { background: #dcefed; color: #075148; white-space: nowrap; }
.button-danger { background: #a51d2d; color: #fff; white-space: nowrap; }
.button-danger:hover { background: #7f1421; text-decoration: none; }
.card-grid { display: grid; gap: 1rem; grid-template-columns: repeat(5, minmax(0, 1fr)); }
.card-grid-four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.metric-card, .panel, .auth-card { background: var(--surface); border: 1px solid var(--border); border-radius: .8rem; box-shadow: 0 4px 16px rgba(24, 36, 47, .04); }
.metric-card { padding: 1.25rem; }
.metric-card-link { color: var(--ink); display: block; transition: border-color .15s, transform .15s; }
.metric-card-link:hover { border-color: var(--primary); text-decoration: none; transform: translateY(-2px); }
.metric-card p, .metric-card span { color: var(--muted); display: block; font-size: .9rem; margin: 0; }
.metric-card strong { display: block; font-size: 1.55rem; letter-spacing: -.03em; margin: .4rem 0; }
.panel { margin-top: 1.5rem; padding: 1.5rem; }
.empty-state h2 { margin-top: 0; }
.empty-state p { color: var(--muted); margin-bottom: 0; }
.auth-card { margin: 4rem auto; max-width: 30rem; padding: 2rem; }
.auth-card > p:not(.eyebrow) { color: var(--muted); }
.stacked-form, .settings-form { margin-top: 1.5rem; }
.form-grid { display: grid; gap: 1.1rem 1.5rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-field { display: flex; flex-direction: column; gap: .35rem; }
.form-field-wide { grid-column: 1 / -1; }
.form-field label { font-weight: 700; }
.form-field input, .form-field textarea { border: 1px solid #b9c7cc; border-radius: .4rem; padding: .65rem .7rem; width: 100%; }
.help-text { color: var(--muted); font-size: .85rem; margin: 0; }
.field-error, .form-errors { color: #a51d2d; margin: 0; }
.filter-grid { align-items: end; display: grid; gap: 1rem; }
.filter-grid label { display: flex; flex-direction: column; font-weight: 700; gap: .35rem; }
.filter-grid input, .filter-grid select { border: 1px solid #b9c7cc; border-radius: .4rem; min-width: 0; padding: .65rem .7rem; width: 100%; }
.filter-grid-dashboard { grid-template-columns: 2fr 1fr 1fr 1.25fr auto; }
.filter-row-primary { grid-template-columns: 2fr 1fr 1fr; }
.filter-row-secondary { grid-template-columns: 1.2fr 1.5fr auto; margin-top: 1rem; }
.filter-actions { align-items: center; display: flex; gap: .8rem; }
.invoice-card-list { display: grid; gap: .9rem; margin-top: 1.5rem; }
.invoice-card { background: var(--surface); border: 1px solid var(--border); border-radius: .8rem; box-shadow: 0 4px 16px rgba(24,36,47,.04); overflow: hidden; }
.invoice-card-main { align-items: center; color: var(--ink); display: grid; gap: 1.5rem; grid-template-columns: minmax(12rem, 1.2fr) 2fr; padding: 1.25rem; }
.invoice-card-main:hover { background: #f7fbfb; text-decoration: none; }
.invoice-card h2 { font-size: 1.1rem; margin: .45rem 0 .15rem; }
.invoice-card p, .invoice-card dl, .invoice-card dd { margin: 0; }
.invoice-card dl { display: grid; gap: 1rem; grid-template-columns: repeat(4, 1fr); }
.invoice-card dt { color: var(--muted); font-size: .8rem; }
.invoice-card dd { font-weight: 700; }
.invoice-card-actions { border-top: 1px solid var(--border); display: flex; gap: 1rem; justify-content: flex-end; padding: .65rem 1.25rem; }
.danger-link { color: #a51d2d; }
.status-badge { background: #dcefed; border-radius: 999px; color: var(--primary-dark); display: inline-block; font-size: .75rem; font-weight: 800; padding: .2rem .55rem; }
.dashboard-list-heading { align-items: baseline; display: flex; gap: 1rem; justify-content: space-between; margin-bottom: 1rem; }
.dashboard-list-heading h2 { margin: 0; }
.dashboard-list-heading span { color: var(--muted); font-size: .85rem; }
.invoice-list-table { display: grid; gap: .45rem; }
.invoice-list-header, .invoice-list-row { align-items: center; display: grid; gap: 1.25rem; grid-template-columns: minmax(14rem, 2fr) minmax(7rem, .8fr) minmax(10rem, 1fr) minmax(7rem, auto); }
.invoice-list-header { color: var(--muted); font-size: .78rem; font-weight: 700; padding: 0 1rem .35rem; text-transform: uppercase; }
.invoice-list-row { border: 1px solid var(--border); border-left: .3rem solid transparent; border-radius: .55rem; color: var(--ink); min-height: 4.4rem; padding: .85rem 1rem; transition: border-color .15s, box-shadow .15s, transform .15s; }
.invoice-list-row:hover { border-color: var(--primary); box-shadow: 0 5px 14px rgba(24, 36, 47, .09); text-decoration: none; transform: translateY(-1px); }
.invoice-list-row small { color: var(--muted); display: none; font-size: .75rem; font-weight: 500; }
.invoice-list-name { display: flex; flex-direction: column; }
.invoice-list-name small { display: block; }
.invoice-list-amount { font-variant-numeric: tabular-nums; text-align: right; }
.invoice-list-date { font-variant-numeric: tabular-nums; }
.invoice-list-status { justify-self: end; }
.invoice-list-row--unpaid, .invoice-list-row--partial { background: #fff9e8; border-left-color: #d39000; }
.invoice-list-row--overdue { background: #fff0f1; border-left-color: #b42335; }
.invoice-list-row--paid { background: #f3faf7; border-left-color: #2a8a67; }
.invoice-list-row--overdue .status-badge { background: #f7ccd1; color: #7f1421; }
.invoice-list-row--unpaid .status-badge, .invoice-list-row--partial .status-badge { background: #f8e3a5; color: #6b4900; }
.invoice-list-empty { color: var(--muted); margin: .5rem 0 0; }
.form-actions { margin-top: 1.5rem; }
.message { border-radius: .45rem; margin-bottom: 1rem; padding: .8rem 1rem; }
.message-success { background: #dcefed; color: #075148; }
.visually-hidden { clip: rect(0 0 0 0); clip-path: inset(50%); height: 1px; overflow: hidden; position: absolute; white-space: nowrap; width: 1px; }
table { border-collapse: collapse; max-width: 100%; width: 100%; }
.payment-row { position: relative; }
.payment-row:hover { background: #f7fbfb; }
.payment-row-link::after { content: ""; inset: 0; position: absolute; }
.payment-row-actions { position: relative; z-index: 1; }
th, td { border-bottom: 1px solid var(--border); padding: .7rem; text-align: left; vertical-align: top; }

@media (max-width: 850px) {
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filter-grid-dashboard, .filter-row-primary, .filter-row-secondary { grid-template-columns: 1fr 1fr; }
  .invoice-card-main { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .header-content, .header-actions, .page-heading { align-items: flex-start; flex-direction: column; }
  .header-content { padding-bottom: 1rem; padding-top: 1rem; }
  .header-actions { gap: .7rem; }
  .header-actions nav { flex-wrap: wrap; }
  .card-grid, .form-grid { grid-template-columns: 1fr; }
  .filter-grid-dashboard, .filter-row-primary, .filter-row-secondary, .invoice-card dl { grid-template-columns: 1fr; }
  .dashboard-list-heading { align-items: flex-start; flex-direction: column; }
  .invoice-list-header { display: none; }
  .invoice-list-row { grid-template-columns: 1fr 1fr; }
  .invoice-list-name { grid-column: 1 / -1; }
  .invoice-list-row > span:not(.invoice-list-name) small { display: block; }
  .invoice-list-amount { text-align: left; }
  .invoice-list-status { justify-self: start; }
  .form-field-wide { grid-column: auto; }
  .panel { overflow-x: auto; }
}