:root {
  color-scheme: light;
  --bg: #0f1117;
  --panel: #161821;
  --panel-2: #1a1d27;
  --line: #2a2d3a;
  --ink: #e2e4e9;
  --muted: #8b8fa3;
  --blue: #2b6ca3;
  --green: #22a06b;
  --paper: #ffffff;
  --paper-ink: #1d1d1f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

button,
input,
select {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.app {
  max-width: 1440px;
  margin: 0 auto;
  padding: 18px;
}

.topbar {
  min-height: 64px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid #22252f;
}

.back-link {
  color: var(--muted);
  font-size: 0.92rem;
}

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

.brand span:first-child {
  width: 3px;
  height: 32px;
  border-radius: 2px;
  background: var(--blue);
}

.brand strong,
.brand small,
.status-strip span,
.field span,
.invoice-meta span,
.detail-grid b {
  display: block;
}

.brand strong {
  letter-spacing: 1.5px;
}

.brand small {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.top-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

button {
  min-height: 40px;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0 14px;
  cursor: pointer;
  font-weight: 700;
}

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

.ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--line);
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0;
}

.status-strip article,
.panel {
  background: var(--panel);
  border: 1px solid #22252f;
  border-radius: 14px;
}

.status-strip article {
  padding: 14px;
}

.status-strip span,
.eyebrow,
.field span {
  color: var(--muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0;
}

.status-strip strong {
  font-size: 1.25rem;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(390px, 0.78fr) minmax(540px, 1fr);
  gap: 16px;
  align-items: start;
}

.panel {
  padding: 22px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 18px;
}

.panel-head.compact {
  margin-bottom: 12px;
}

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

h1 {
  margin-bottom: 0;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1;
}

h2 {
  margin-bottom: 12px;
}

.form-stack {
  display: grid;
  gap: 24px;
}

.company-box {
  margin-bottom: 22px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
}

.upload-panel {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(43, 108, 163, 0.08);
}

.upload-panel h2,
.upload-panel p {
  margin-bottom: 0;
}

.upload-box {
  display: grid;
  place-items: center;
  min-height: 118px;
  border: 2px dashed #3a4960;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  cursor: pointer;
  text-align: center;
}

.upload-box input {
  display: none;
}

.upload-box.dragover {
  border-color: #4a8fd4;
  color: #fff;
  background: rgba(74, 143, 212, 0.12);
}

.upload-status {
  color: var(--muted);
  font-size: 0.9rem;
}

.upload-status.ok {
  color: #8ee2bd;
}

.upload-status.error {
  color: #ffb3b3;
}

.raw-text-box {
  color: var(--muted);
}

.raw-text-box textarea {
  width: 100%;
  margin-top: 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  padding: 10px;
  background: var(--panel-2);
  color: var(--ink);
  resize: vertical;
}

.raw-text-box button {
  margin-top: 10px;
}

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

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

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 5px;
}

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

.field input,
.field select {
  width: 100%;
  min-height: 42px;
  border-radius: 8px;
  border: 1px solid var(--line);
  padding: 0 11px;
  background: var(--panel-2);
  color: var(--ink);
  outline: none;
}

.field input:focus,
.field select:focus {
  border-color: #4a8fd4;
}

.preview-panel {
  position: sticky;
  top: 16px;
}

.invoice-paper {
  min-height: 840px;
  padding: 54px;
  background: var(--paper);
  color: var(--paper-ink);
  border-radius: 8px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
}

.invoice-header,
.invoice-meta,
.invoice-footer {
  display: flex;
  justify-content: space-between;
  gap: 28px;
}

.invoice-header {
  align-items: start;
}

.invoice-header small {
  color: #707070;
}

.invoice-header h2 {
  margin: 34px 0 0;
  font-size: 2.2rem;
  letter-spacing: 0;
}

.invoice-header strong {
  color: var(--blue);
}

.invoice-brand {
  text-align: right;
  border-left: 3px solid #1a1a1a;
  padding-left: 14px;
}

.invoice-brand b,
.invoice-brand span {
  display: block;
}

.invoice-brand span {
  color: #777;
  font-size: 0.72rem;
  letter-spacing: 3px;
}

.invoice-meta {
  margin: 34px 0;
}

.invoice-meta b {
  display: block;
  margin-bottom: 3px;
}

.invoice-meta dl {
  display: grid;
  grid-template-columns: auto auto;
  gap: 6px 20px;
  margin: 0;
  text-align: right;
}

.invoice-meta dt {
  color: #666;
}

.invoice-meta dd {
  margin: 0;
  font-weight: 700;
}

.invoice-table {
  width: 100%;
  border-collapse: collapse;
  margin: 30px 0 22px;
}

.invoice-table th {
  border-bottom: 1px solid #1d1d1f;
  text-align: left;
  padding: 8px 0;
}

.invoice-table th:last-child,
.invoice-table td:last-child {
  text-align: right;
}

.invoice-table td {
  padding: 12px 0;
  vertical-align: top;
}

.invoice-table td span {
  display: block;
  color: #666;
  font-size: 0.86rem;
}

.invoice-details {
  color: #555;
  font-size: 0.94rem;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0;
  color: #1d1d1f;
}

.detail-grid b {
  margin-bottom: 4px;
}

.totals {
  display: grid;
  justify-items: end;
  gap: 8px;
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px dashed #c9c9c9;
}

.totals strong {
  font-size: 1.25rem;
}

.paid {
  text-align: center;
  font-weight: 700;
  font-size: 1.1rem;
  margin: 42px 0;
}

.invoice-footer {
  margin-top: 38px;
  padding-top: 14px;
  border-top: 1px solid #cfcfcf;
  color: #777;
  font-size: 0.78rem;
}

@media (max-width: 1120px) {
  .topbar,
  .workspace {
    grid-template-columns: 1fr;
  }

  .brand {
    justify-self: start;
  }

  .top-actions {
    justify-content: start;
  }

  .preview-panel {
    position: static;
  }
}

@media (max-width: 760px) {
  .status-strip,
  .grid.two,
  .grid.three,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .invoice-paper {
    padding: 28px;
  }

  .invoice-header,
  .invoice-meta,
  .invoice-footer {
    display: grid;
  }
}

@media print {
  body {
    background: #fff;
  }

  .topbar,
  .status-strip,
  .form-panel,
  .panel-head {
    display: none !important;
  }

  .app,
  .workspace,
  .preview-panel,
  .panel {
    display: block;
    max-width: none;
    margin: 0;
    padding: 0;
    border: 0;
    background: #fff;
  }

  .invoice-paper {
    min-height: auto;
    padding: 18mm;
    border-radius: 0;
    box-shadow: none;
  }
}