:root {
  --app-bg: #f3f4f6;
  --panel-bg: #ffffff;
  --ink: #111111;
  --muted: #5d6470;
  --line: #111111;
  --soft-line: #d8dce2;
  --focus: #0f3d75;
  --paper-w: 8.5in;
  --paper-h: 11in;
  --paper-margin-x: 0.72in;
  --paper-margin-y: 0.60in;
  --doc-font-size: 9pt;
  --doc-line-height: 1.38;
  --logo-width: 1.12in;
  --signature-size: 20pt;
  --stage-scale: 1;
  --font-main: Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  min-height: 100%;
  margin: 0;
  color: var(--ink);
  background: var(--app-bg);
  font-family: var(--font-main);
}

button, input, textarea, select {
  font-family: var(--font-main);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(320px, 380px) 1fr;
  gap: 20px;
  padding: 18px;
}

.control-panel {
  background: var(--panel-bg);
  border: 1px solid var(--soft-line);
  border-radius: 18px;
  box-shadow: 0 20px 50px rgba(0,0,0,.08);
  padding: 16px;
  max-height: calc(100vh - 36px);
  position: sticky;
  top: 18px;
  overflow: auto;
}

.brand-block {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}

.brand-block img {
  width: 72px;
  height: auto;
}

.brand-block h1 {
  margin: 0 0 4px;
  font-size: 18px;
  letter-spacing: -.02em;
}

.brand-block p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin: 12px 0 14px;
}

.tab-button,
button {
  appearance: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 12px;
  cursor: pointer;
  transition: transform .15s ease, opacity .15s ease;
}

button:hover { opacity: .92; }
button:active { transform: translateY(1px); }

button.secondary,
.tab-button {
  background: #fff;
  color: var(--ink);
  border-color: var(--soft-line);
}

.tab-button.active {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.tab-panel h2,
.actions h2 {
  margin: 15px 0 10px;
  padding-top: 12px;
  border-top: 1px solid var(--soft-line);
  font-size: 12px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.tab-panel h2:first-child {
  border-top: 0;
  padding-top: 0;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

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

label {
  display: grid;
  gap: 5px;
  color: #222;
  font-size: 12px;
  font-weight: 700;
}

input, textarea, select {
  width: 100%;
  border: 1px solid var(--soft-line);
  border-radius: 10px;
  padding: 8px 10px;
  background: #fff;
  color: var(--ink);
  font-size: 12px;
  font-weight: 400;
}

textarea {
  min-height: 74px;
  resize: vertical;
  line-height: 1.35;
}

.small {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.42;
}

.list-toolbar,
.actions {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.actions {
  border-top: 1px solid var(--soft-line);
  padding-top: 14px;
  grid-template-columns: 1fr 1fr;
}

.actions .primary {
  grid-column: span 2;
  padding: 11px 12px;
}

.scope-editor-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.scope-editor-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 6px;
  align-items: start;
}

.scope-editor-row textarea {
  min-height: 46px;
}

.scope-editor-row button {
  padding: 8px;
  min-width: 34px;
}

.cost-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--soft-line);
  border-radius: 12px;
}

.cost-editor-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.cost-editor-table th,
.cost-editor-table td {
  border-bottom: 1px solid var(--soft-line);
  padding: 6px;
  text-align: left;
}

.cost-editor-table th {
  background: #f8f9fb;
}

.cost-editor-table input,
.cost-editor-table select {
  min-width: 70px;
  padding: 6px;
  border-radius: 8px;
  font-size: 11px;
}

.calculation-card {
  margin: 10px 0 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid var(--soft-line);
  border-radius: 12px;
  padding: 10px 12px;
  background: #fafafa;
  font-size: 13px;
}

.format-tools {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
}

.format-tools button {
  padding: 7px 5px;
  font-size: 11px;
}

.preview-panel {
  min-width: 0;
}

.preview-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: calc(var(--paper-w) * var(--stage-scale));
  margin: 0 auto 10px;
  color: var(--muted);
  font-size: 12px;
}

.paper-stage {
  width: 100%;
  min-height: calc(var(--paper-h) * var(--stage-scale));
  display: flex;
  justify-content: center;
  align-items: flex-start;
  overflow: auto;
  padding: 4px 0 40px;
}

.paper {
  width: var(--paper-w);
  min-height: var(--paper-h);
  background: #fff;
  color: var(--ink);
  padding: var(--paper-margin-y) var(--paper-margin-x);
  box-shadow: 0 22px 60px rgba(0,0,0,.18);
  transform: scale(var(--stage-scale));
  transform-origin: top center;
  font-size: var(--doc-font-size);
  line-height: var(--doc-line-height);
  font-family: var(--font-main);
}

.doc-header {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: .32in;
  align-items: start;
  margin-bottom: .34in;
}

.company-logo {
  width: var(--logo-width);
  height: auto;
  display: block;
}

.doc-title-block {
  min-width: 2.0in;
  line-height: 1.35;
}

.date-line {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .24in;
  margin-bottom: .06in;
}

.proposal-title {
  font-weight: 700;
  font-size: 11.5pt;
  letter-spacing: .01em;
}

.doc-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .60in;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: .18in 0 .20in;
  margin-bottom: .32in;
}

.info-column {
  display: grid;
  gap: .075in;
}

.info-row {
  display: grid;
  grid-template-columns: 1.05in 1fr;
  gap: .16in;
  align-items: start;
}

.doc-section {
  border-bottom: 1px solid var(--line);
  padding-bottom: .22in;
  margin-bottom: .22in;
}

.doc-section h2 {
  margin: 0 0 .15in;
  font-size: 10pt;
  text-transform: uppercase;
  letter-spacing: .01em;
}

.doc-section p {
  margin: 0 0 .14in;
}

#doc-scope-list {
  margin: 0;
  padding-left: .37in;
}

#doc-scope-list li {
  margin-bottom: .055in;
  padding-left: .04in;
}

.materials-section p {
  margin-bottom: .10in;
}

.price-row {
  width: 100%;
  border-collapse: collapse;
  margin: .18in 0 .19in;
  font-size: 9.1pt;
}

.price-row td {
  border: 1px solid var(--line);
  padding: .095in .12in;
}

.price-row td:last-child {
  width: 1.75in;
  text-align: center;
  white-space: nowrap;
}

.payment-note {
  text-align: center;
  margin: 0 0 .13in;
}

.contact-note {
  text-align: center;
  margin: 0 0 .18in;
  font-size: 8.5pt;
}

.signature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .70in;
  margin-top: .08in;
}

.signature-line {
  min-height: .33in;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: flex-end;
  padding-left: .02in;
}

.signature-text {
  font-family: "Brush Script MT", "Segoe Script", cursive;
  font-size: var(--signature-size);
  line-height: 1;
  letter-spacing: .02em;
}

.signature-label {
  margin-top: .04in;
  font-size: 8.4pt;
}

.date-signature {
  margin-top: .08in;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .10in;
  align-items: end;
}

.date-signature span:last-child {
  border-bottom: 1px solid var(--line);
  min-height: .15in;
  padding-left: .03in;
}

[contenteditable="true"] {
  outline: 1px solid transparent;
  border-radius: 3px;
}

[contenteditable="true"]:hover,
[contenteditable="true"]:focus {
  outline-color: rgba(15,61,117,.22);
  background: rgba(245, 248, 255, .65);
}

@media (orientation: landscape) and (max-width: 1180px) {
  .app-shell {
    grid-template-columns: minmax(300px, 330px) 1fr;
    gap: 12px;
  }

  .control-panel {
    max-height: calc(100vh - 24px);
  }
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 10px;
  }

  .control-panel {
    position: static;
    max-height: none;
  }

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

  .span-2 {
    grid-column: span 1;
  }
}

@media (max-width: 660px) {
  .tabs {
    grid-template-columns: 1fr 1fr;
  }

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

  .actions .primary {
    grid-column: span 1;
  }

  .preview-toolbar {
    padding: 0 4px;
  }
}

@page {
  size: letter;
  margin: 0;
}

@media print {
  html, body {
    width: 8.5in;
    min-height: 11in;
    background: #fff;
  }

  .control-panel,
  .preview-toolbar {
    display: none !important;
  }

  .app-shell,
  .preview-panel,
  .paper-stage {
    display: block;
    width: 8.5in;
    min-height: 11in;
    margin: 0;
    padding: 0;
    overflow: visible;
  }

  .paper {
    width: 8.5in;
    min-height: 11in;
    height: 11in;
    box-shadow: none;
    transform: none;
    overflow: hidden;
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }

  [contenteditable="true"]:hover,
  [contenteditable="true"]:focus {
    outline: none;
    background: transparent;
  }
}