:root {
  color-scheme: light;
  --paper: #fbf7ef;
  --ink: #171717;
  --muted: #68635b;
  --line: #d8d0c2;
  --surface: #fffdf8;
  --field: #fffaf1;
  --accent: #0f766e;
  --accent-dark: #0b4f4a;
  --gold: #d79b35;
  --danger: #9f3030;
  --shadow: 0 24px 70px rgba(28, 22, 10, 0.16);
  --radius: 6px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(90deg, rgba(23, 23, 23, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(23, 23, 23, 0.03) 1px, transparent 1px),
    var(--paper);
  background-size: 36px 36px;
  color: var(--ink);
  font-family: "Avenir Next", Avenir, "Gill Sans", "Trebuchet MS", sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 48px);
  border-bottom: 1px solid rgba(23, 23, 23, 0.12);
  background: rgba(251, 247, 239, 0.9);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border: 2px solid var(--ink);
  background: var(--gold);
  box-shadow: 4px 4px 0 var(--ink);
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  overflow-wrap: anywhere;
  line-height: 1.05;
}

.brand small,
.eyebrow {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.top-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.text-link {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-decoration-thickness: 3px;
  text-underline-offset: 5px;
}

.dark-button,
.ghost-button,
.danger-button,
.mini-button,
.icon-button {
  min-height: 40px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 850;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.dark-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 15px;
  background: var(--ink);
  color: #fffdf8;
  text-decoration: none;
  box-shadow: 4px 4px 0 var(--gold);
}

.ghost-button {
  padding: 10px 15px;
  background: var(--surface);
  color: var(--ink);
}

.danger-button {
  padding: 10px 15px;
  background: #fff5f2;
  color: var(--danger);
}

.mini-button {
  padding: 8px 12px;
  background: var(--accent);
  color: white;
}

.icon-button {
  width: 40px;
  height: 40px;
  background: var(--ink);
  color: white;
  font-size: 1.45rem;
  line-height: 1;
}

.dark-button:hover,
.ghost-button:hover,
.danger-button:hover,
.mini-button:hover,
.icon-button:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--gold);
}

.app-shell {
  width: min(1540px, 100%);
  margin: 0 auto;
  padding: clamp(22px, 4vw, 52px);
}

.intro-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  gap: clamp(20px, 5vw, 80px);
  align-items: end;
  min-height: 250px;
  padding: 28px 0 42px;
  border-bottom: 2px solid var(--ink);
}

.intro-panel > *,
.workspace > *,
.preview-panel,
.editor-panel {
  min-width: 0;
}

.intro-panel h1 {
  max-width: 820px;
  margin: 8px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 6.4rem;
  font-weight: 900;
  letter-spacing: 0;
  line-height: 0.9;
  overflow-wrap: break-word;
}

.intro-panel p:last-child {
  max-width: 440px;
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.55;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 0.84fr) minmax(380px, 1.16fr);
  gap: clamp(18px, 3vw, 34px);
  align-items: start;
  padding: 34px 0;
}

.editor-panel,
.preview-panel {
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.94);
  box-shadow: var(--shadow);
}

.editor-panel {
  padding: clamp(16px, 2.2vw, 26px);
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 26px 0 14px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.section-heading:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.section-heading span {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: white;
  font-size: 0.82rem;
  font-weight: 900;
}

.section-heading h2 {
  margin: 0;
  font-size: 1.03rem;
}

.line-heading {
  flex-wrap: wrap;
}

.line-heading .mini-button {
  margin-left: auto;
}

label {
  display: grid;
  gap: 7px;
  margin-bottom: 13px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 850;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(23, 23, 23, 0.32);
  border-radius: var(--radius);
  background: var(--field);
  color: var(--ink);
  outline: none;
}

input,
select {
  min-height: 43px;
  padding: 0 11px;
}

textarea {
  min-height: 88px;
  padding: 10px 11px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.16);
}

.field-grid {
  display: grid;
  gap: 12px;
}

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

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

.line-items {
  display: grid;
  gap: 10px;
}

.line-item {
  display: grid;
  grid-template-columns: minmax(160px, 1fr) minmax(76px, 0.28fr) minmax(92px, 0.36fr) 40px;
  gap: 9px;
  align-items: end;
  padding: 12px;
  border: 1px dashed rgba(23, 23, 23, 0.24);
  border-radius: var(--radius);
  background: rgba(251, 247, 239, 0.7);
}

.line-item label {
  margin: 0;
}

.preview-panel {
  position: sticky;
  top: 88px;
  padding: clamp(14px, 2vw, 22px);
}

.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.preview-toolbar h2 {
  margin: 2px 0 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid rgba(15, 118, 110, 0.28);
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.1);
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 900;
}

.invoice-paper {
  min-height: 760px;
  padding: clamp(20px, 4vw, 48px);
  border: 1px solid rgba(23, 23, 23, 0.16);
  background: #fff;
  box-shadow: 0 18px 42px rgba(26, 20, 10, 0.14);
}

.invoice-head {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  padding-bottom: 28px;
  border-bottom: 3px solid var(--ink);
}

.invoice-title {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 4.2rem;
  letter-spacing: 0;
  line-height: 0.95;
}

.invoice-meta {
  min-width: 190px;
  text-align: right;
}

.invoice-meta p,
.party p,
.invoice-note,
.invoice-footer {
  white-space: pre-line;
}

.invoice-meta p,
.party p {
  margin: 6px 0;
  color: var(--muted);
  line-height: 1.4;
}

.party-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin: 34px 0;
}

.party h3,
.totals h3 {
  margin: 0 0 8px;
  color: var(--accent-dark);
  font-size: 0.83rem;
  text-transform: uppercase;
}

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

.invoice-table th,
.invoice-table td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.invoice-table th {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.invoice-table th:nth-child(2),
.invoice-table th:nth-child(3),
.invoice-table th:nth-child(4),
.invoice-table td:nth-child(2),
.invoice-table td:nth-child(3),
.invoice-table td:nth-child(4) {
  text-align: right;
}

.invoice-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 0.4fr);
  gap: 24px;
  margin-top: 28px;
}

.invoice-note {
  color: var(--muted);
  line-height: 1.55;
}

.totals {
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  overflow: hidden;
}

.total-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}

.total-row:last-child {
  border-bottom: 0;
}

.total-row.grand {
  background: var(--ink);
  color: white;
  font-size: 1.2rem;
  font-weight: 950;
}

.invoice-footer {
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.55;
}

.template-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 14px 0 42px;
  padding: clamp(18px, 3vw, 30px);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--gold);
  box-shadow: 7px 7px 0 var(--ink);
}

.template-band h2 {
  margin: 4px 0 8px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 3rem;
  line-height: 0.98;
}

.template-band p {
  max-width: 780px;
  margin: 0;
  line-height: 1.5;
}

@media (max-width: 1050px) {
  .workspace,
  .intro-panel {
    grid-template-columns: 1fr;
  }

  .intro-panel h1 {
    font-size: 4.25rem;
  }

  .preview-panel {
    position: static;
  }
}

@media (max-width: 760px) {
  .topbar,
  .template-band,
  .invoice-head,
  .preview-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .top-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .top-actions .text-link,
  .top-actions .dark-button {
    grid-column: 1 / -1;
  }

  .field-grid.two,
  .field-grid.three,
  .party-grid,
  .invoice-summary {
    grid-template-columns: 1fr;
  }

  .line-item {
    grid-template-columns: 1fr 1fr 42px;
  }

  .line-item label:first-child {
    grid-column: 1 / -1;
  }

  .invoice-meta {
    text-align: left;
  }

  .intro-panel h1 {
    font-size: 2.8rem;
    line-height: 1;
  }

  .invoice-title {
    font-size: 2.8rem;
  }

  .template-band h2 {
    font-size: 2rem;
  }

  .invoice-paper {
    min-height: 0;
    overflow-x: auto;
  }

  .invoice-table {
    min-width: 520px;
  }
}

@media (max-width: 460px) {
  .app-shell {
    padding: 16px;
  }

  .top-actions {
    grid-template-columns: 1fr;
  }

  .line-item {
    grid-template-columns: 1fr;
  }

  .intro-panel h1 {
    font-size: 2.35rem;
  }

  .icon-button {
    width: 100%;
  }
}

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

  .topbar,
  .intro-panel,
  .editor-panel,
  .preview-toolbar,
  .template-band {
    display: none !important;
  }

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

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