:root {
  --ink: #1a1d24;
  --paper: #fcfbf8;
  --paper-line: #e7e1d3;
  --paper-muted: #7c7566;
  --shell-bg: #12161d;
  --panel-bg: #1b212b;
  --panel-bg-raised: #212836;
  --panel-border: #2a313d;
  --text-main: #edeff3;
  --text-soft: #9aa3b2;
  --text-faint: #5c6472;
  --accent: #3c8172;
  --accent-hover: #4a9484;
  --accent-tint: #e9f2ef;
  --seal: #b8862e;
  --seal-tint: #f4e9d2;
  --danger: #c1554a;
  --danger-tint: #3a2323;
  --radius: 10px;
  --serif: "Fraunces", serif;
  --sans: "IBM Plex Sans", sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
}
body {
  background: var(--shell-bg);
  color: var(--text-main);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  border-bottom: 1px solid var(--panel-border);
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(18, 22, 29, 0.92);
  backdrop-filter: blur(8px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(155deg, var(--accent), #255a4f);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-weight: 700;
  color: #fff;
  font-size: 17px;
  flex: none;
}
.brand-text h1 {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.2px;
}
.brand-text span {
  font-size: 11.5px;
  color: var(--text-soft);
  font-family: var(--mono);
  letter-spacing: 0.4px;
}

.topbar-actions {
  display: flex;
  gap: 10px;
}

.view-toggle {
  display: none;
  gap: 6px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 3px;
}
.view-toggle button {
  border: none;
  background: transparent;
  color: var(--text-soft);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 999px;
  cursor: pointer;
}
.view-toggle button.active {
  background: var(--accent);
  color: #fff;
}

/* ---------- Buttons ---------- */
button {
  font-family: var(--sans);
  cursor: pointer;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: var(--panel-bg-raised);
  color: var(--text-main);
  font-size: 13.5px;
  font-weight: 600;
  transition: all 0.15s ease;
}
.btn:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
}
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}
.btn-ghost {
  background: transparent;
}
.btn-danger-ghost {
  background: transparent;
  color: var(--text-soft);
  border-color: transparent;
  padding: 6px 8px;
  font-size: 12px;
}
.btn-danger-ghost:hover {
  color: var(--danger);
  border-color: var(--danger);
}
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.btn svg {
  width: 15px;
  height: 15px;
  flex: none;
}

/* ---------- Layout ---------- */
.app {
  display: grid;
  grid-template-columns: minmax(360px, 460px) 1fr;
  gap: 0;
  align-items: start;
}
.editor {
  padding: 28px;
  max-width: 640px;
}
.stage {
  padding: 40px 40px 80px;
  display: flex;
  justify-content: center;
  position: sticky;
  top: 73px;
  max-height: calc(100vh - 73px);
  overflow-y: auto;
}

/* ---------- Form sections ---------- */
.section {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 16px;
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 16px;
}
.section-head h2 {
  font-family: var(--mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--text-soft);
  font-weight: 600;
  margin: 0;
}
.section-head .count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-faint);
}

.field {
  margin-bottom: 14px;
}
.field:last-child {
  margin-bottom: 0;
}
.field label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 6px;
}
.field label .opt {
  font-weight: 400;
  color: var(--text-faint);
}
.field input[type="text"],
.field input[type="number"],
.field input[type="date"],
.field input[type="email"],
.field select,
.field textarea {
  width: 100%;
  background: var(--shell-bg);
  border: 1px solid var(--panel-border);
  color: var(--text-main);
  border-radius: 7px;
  padding: 10px 12px;
  font-size: 14px;
  font-family: var(--sans);
  transition: border-color 0.15s ease;
}
.field textarea {
  resize: vertical;
  min-height: 70px;
  line-height: 1.5;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(60, 129, 114, 0.18);
}
.field input.err,
.field textarea.err {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(193, 85, 74, 0.14);
}
.err-msg {
  display: none;
  font-size: 11.5px;
  color: var(--danger);
  margin-top: 5px;
  font-family: var(--mono);
}
.field.has-err .err-msg {
  display: block;
}

.row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.row3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

.checkline {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--text-soft);
}
.checkline input {
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
}

/* Logo upload */
.logo-upload {
  display: flex;
  align-items: center;
  gap: 14px;
}
.logo-preview {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  border: 1px dashed var(--panel-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex: none;
  background: var(--shell-bg);
}
.logo-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.logo-preview svg {
  width: 20px;
  height: 20px;
  color: var(--text-faint);
}
.logo-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.logo-controls .btn {
  padding: 8px 12px;
  font-size: 12.5px;
}
input[type="file"] {
  display: none;
}

/* Line items */
.items-table {
  width: 100%;
  border-collapse: collapse;
}
.items-head {
  display: grid;
  grid-template-columns: 1fr 64px 84px 92px 30px;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-faint);
  padding: 0 2px 8px;
}
.item-row {
  display: grid;
  grid-template-columns: 1fr 64px 84px 92px 30px;
  gap: 8px;
  align-items: start;
  margin-bottom: 8px;
}
.item-row input {
  background: var(--shell-bg);
  border: 1px solid var(--panel-border);
  color: var(--text-main);
  border-radius: 6px;
  padding: 9px 10px;
  font-size: 13.5px;
  width: 100%;
  font-family: var(--sans);
}
.item-row .it-field {
  min-width: 0;
}
.item-row .mini-label {
  display: none;
}
.item-row input:focus {
  outline: none;
  border-color: var(--accent);
}
.item-row input.err {
  border-color: var(--danger);
}
.item-row .line-total {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-soft);
  padding-top: 9px;
}
.remove-row {
  background: transparent;
  border: none;
  color: var(--text-faint);
  width: 26px;
  height: 26px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
}
.remove-row:hover {
  color: var(--danger);
  background: var(--danger-tint);
}
.remove-row svg {
  width: 14px;
  height: 14px;
}
.add-row-btn {
  width: 100%;
  margin-top: 6px;
  padding: 10px;
  border-radius: 7px;
  border: 1px dashed var(--panel-border);
  background: transparent;
  color: var(--text-soft);
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.add-row-btn:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
}

.adjust-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ---------- Preview / paper ---------- */
.preview-paper {
  width: 100%;
  max-width: 760px;
  background: var(--paper);
  color: var(--ink);
  border-radius: 3px;
  box-shadow:
    0 30px 60px -20px rgba(0, 0, 0, 0.55),
    0 2px 8px rgba(0, 0, 0, 0.25);
  padding: 56px 56px 48px;
  position: relative;
  min-height: 900px;
}
.paper-seal {
  position: absolute;
  top: 44px;
  right: 52px;
  width: 104px;
  height: 104px;
  border-radius: 50%;
  border: 2px solid var(--seal);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  transform: rotate(8deg);
  color: var(--seal);
  text-align: center;
}
.paper-seal::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--seal);
  border-radius: 50%;
  opacity: 0.55;
}
.paper-seal .seal-label {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  margin-bottom: 3px;
}
.paper-seal .seal-num {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.25;
  padding: 0 6px;
  word-break: break-word;
}

.paper-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  padding-right: 120px;
}
.paper-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.paper-logo {
  width: 46px;
  height: 46px;
  border-radius: 6px;
  object-fit: contain;
  flex: none;
}
.paper-logo-fallback {
  width: 46px;
  height: 46px;
  border-radius: 6px;
  background: var(--accent-tint);
  border: 1px solid var(--paper-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-weight: 700;
  color: var(--accent);
  font-size: 18px;
  flex: none;
}
.paper-biz-name {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  margin: 0;
  line-height: 1.25;
}
.paper-biz-meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--paper-muted);
  margin-top: 3px;
}

.paper-title {
  margin-top: 36px;
}
.paper-title h1 {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.5px;
  color: var(--ink);
}
.paper-title .proj {
  font-size: 14px;
  color: var(--paper-muted);
  margin-top: 6px;
  font-style: italic;
  font-family: var(--serif);
}

.paper-meta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 28px;
  padding: 16px 0;
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}
.paper-meta-grid div .k {
  font-family: var(--mono);
  font-size: 9.5px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--paper-muted);
  margin-bottom: 4px;
}
.paper-meta-grid div .v {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.paper-parties {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 26px;
}
.paper-parties .k {
  font-family: var(--mono);
  font-size: 9.5px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--paper-muted);
  margin-bottom: 5px;
}
.paper-parties .v {
  font-size: 15px;
  font-weight: 600;
  font-family: var(--sans);
}
.paper-desc {
  margin-top: 22px;
  font-size: 13.5px;
  line-height: 1.65;
  color: #3a3f48;
}

.paper-items {
  margin-top: 32px;
}
.paper-items table {
  width: 100%;
  border-collapse: collapse;
}
.paper-items thead th {
  text-align: left;
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--paper-muted);
  padding: 0 0 8px;
  border-bottom: 1.5px solid var(--ink);
  font-weight: 600;
}
.paper-items thead th.num {
  text-align: right;
}
.paper-items tbody td {
  padding: 11px 0;
  font-size: 13.5px;
  background-image: repeating-linear-gradient(
    var(--paper-line) 0 1px,
    transparent 1px 100%
  );
  background-position: bottom;
  background-size: 100% 100%;
  background-repeat: no-repeat;
  border-bottom: 1px solid var(--paper-line);
}
.paper-items tbody td.num {
  text-align: right;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}
.paper-items tbody td.desc-cell .it-desc {
  font-weight: 600;
}

.paper-totals {
  margin-top: 6px;
  margin-left: auto;
  width: 280px;
  padding-top: 14px;
}
.paper-totals .trow {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  padding: 6px 0;
  color: #4a4f58;
}
.paper-totals .trow .val {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}
.paper-totals .trow.grand {
  border-top: 1.5px solid var(--ink);
  margin-top: 6px;
  padding-top: 12px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}
.paper-totals .trow.grand .val {
  font-family: var(--serif);
  font-size: 22px;
}

.paper-notes {
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid var(--paper-line);
}
.paper-notes .k {
  font-family: var(--mono);
  font-size: 9.5px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--paper-muted);
  margin-bottom: 8px;
}
.paper-notes .v {
  font-size: 12.5px;
  line-height: 1.7;
  color: #4a4f58;
  white-space: pre-wrap;
}

.paper-foot {
  margin-top: 40px;
  text-align: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.6px;
  color: var(--paper-muted);
}

.empty-hint {
  color: var(--paper-muted);
  font-style: italic;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--panel-bg-raised);
  border: 1px solid var(--panel-border);
  color: var(--text-main);
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}