/* ==========================================================================
   Invoice & Document Studio — styles.css
   Full rebuild: 4 layouts, complete color system, signer mode, scan PDF effect
   ========================================================================== */

/* Design tokens (overridden per palette / custom colors via JS) */
:root {
  --c-dark:         #1E4A3E;
  --c-accent:       #2F6F5E;
  --c-accent-soft:  #E4EEEA;
  --c-accent-ink:   #1E4A3E;
  --c-page-bg:      #FBFAF7;
  --c-header-text:  #FFFFFF;
  --c-body-text:    #1C2B39;
  --c-body-soft:    #4B5B68;
  --c-table-stripe: #F1EFEA;
  --c-line:         #D8D3C8;
  --c-canvas:       #EDEBE5;
  --c-canvas-2:     #E3E0D8;
  --c-danger:       #B3432B;
  --c-danger-soft:  #F5E4DF;
  --tbl-radius:     0px;
  --logo-size:      64px;
  --font-ui:        'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif:     'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-playfair:  'Playfair Display', Georgia, serif;
  --font-mono:      'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
  --radius-sm: 4px; --radius-md: 8px; --radius-lg: 14px;
  --shadow-sheet: 0 1px 3px rgba(0,0,0,.07), 0 24px 48px -16px rgba(0,0,0,.28);
  --preview-zoom: .85;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { font-family: var(--font-ui); color: var(--c-body-text); background: var(--c-canvas); -webkit-font-smoothing: antialiased; }
h1,h2,h3,h4 { margin: 0; } p { margin: 0; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }
::selection { background: var(--c-accent-soft); color: var(--c-accent-ink); }

/* ===================== APP SHELL ===================== */
.app { display: flex; flex-direction: column; min-height: 100vh; }
.app__body { flex: 1; display: grid; grid-template-columns: 72px minmax(340px, 440px) 1fr; min-height: 0; overflow: hidden; }

/* Top bar */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 20px; background: var(--c-dark); color: #fff; border-bottom: 1px solid rgba(255,255,255,.08); flex-wrap: wrap; }
.topbar__brand { display: flex; align-items: center; gap: 12px; }
.topbar__mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: var(--radius-md); background: var(--c-accent); font-family: var(--font-mono); font-weight: 700; font-size: 12px; color: #fff; flex-shrink: 0; }
.topbar__brand h1 { font-size: 15px; font-weight: 700; letter-spacing: -.01em; line-height: 1.2; }
.topbar__brand p { font-size: 11px; color: rgba(255,255,255,.5); margin-top: 2px; }
.topbar__actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.save-indicator { font-size: 11.5px; color: rgba(159,216,196,.85); display: flex; align-items: center; gap: 5px; margin-right: 4px; opacity: .55; transition: opacity .3s; }

/* Mode switcher */
.modeswitcher { display: flex; border-radius: var(--radius-md); overflow: hidden; border: 1px solid rgba(255,255,255,.15); }
.modeswitcher__btn { background: transparent; color: rgba(255,255,255,.6); border: none; padding: 7px 13px; font-size: 12.5px; font-weight: 600; display: flex; align-items: center; gap: 6px; transition: background .15s, color .15s; }
.modeswitcher__btn:hover { background: rgba(255,255,255,.08); color: #fff; }
.modeswitcher__btn.is-active { background: var(--c-accent); color: #fff; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 600; padding: 8px 13px; border-radius: var(--radius-md); border: 1px solid transparent; transition: transform .08s, background .15s, filter .15s; white-space: nowrap; }
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--c-accent); color: #fff; }
.btn--primary:hover { filter: brightness(1.12); }
.btn--secondary { background: var(--c-accent-soft); color: var(--c-accent-ink); margin-top: 18px; }
.btn--secondary:hover { filter: brightness(.95); }
.btn--ghost { background: transparent; color: rgba(255,255,255,.7); border-color: rgba(255,255,255,.18); }
.btn--ghost:hover { background: rgba(255,255,255,.08); color: #fff; }
.btn--sm { padding: 5px 9px; font-size: 12px; margin-top: 10px; color: var(--c-danger); border: 1px solid var(--c-line); background: #fff; }
.btn--sm:hover { background: var(--c-danger-soft); border-color: var(--c-danger); }
.btn--split { padding: 8px 9px; border-left: 1px solid rgba(255,255,255,.2); border-radius: 0 var(--radius-md) var(--radius-md) 0; }

/* PDF split + dropdown */
.pdf-actions { display: flex; position: relative; }
.pdf-actions .btn--primary:first-child { border-radius: var(--radius-md) 0 0 var(--radius-md); }
.pdf-dropdown { position: absolute; top: calc(100% + 6px); right: 0; background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius-md); box-shadow: 0 8px 24px rgba(0,0,0,.14); z-index: 200; min-width: 220px; opacity: 0; pointer-events: none; transform: translateY(-4px); transition: opacity .15s, transform .15s; }
.pdf-dropdown.is-open { opacity: 1; pointer-events: auto; transform: none; }
.pdf-dropdown__item { display: flex; align-items: flex-start; gap: 12px; padding: 13px 16px; width: 100%; background: none; border: none; text-align: left; font-size: 13px; color: var(--c-body-text); border-bottom: 1px solid var(--c-line); }
.pdf-dropdown__item:last-child { border-bottom: none; }
.pdf-dropdown__item:hover { background: var(--c-accent-soft); }
.pdf-dropdown__item i { font-size: 18px; color: var(--c-accent); margin-top: 2px; flex-shrink: 0; }
.pdf-dropdown__item strong { display: block; font-weight: 700; }
.pdf-dropdown__item span { font-size: 11.5px; color: var(--c-body-soft); line-height: 1.4; }

/* ===================== RAIL TABS ===================== */
.railtabs { background: var(--c-dark); display: flex; flex-direction: column; align-items: stretch; padding: 12px 5px; gap: 2px; border-right: 1px solid rgba(255,255,255,.06); }
.railtabs.is-hidden { display: none; }
.railtabs__btn { display: flex; flex-direction: column; align-items: center; gap: 5px; background: none; border: none; color: rgba(255,255,255,.4); padding: 11px 4px; border-radius: var(--radius-md); font-size: 10px; letter-spacing: .01em; line-height: 1.2; transition: color .15s, background .15s; }
.railtabs__btn i { font-size: 15px; }
.railtabs__btn:hover { color: rgba(255,255,255,.85); background: rgba(255,255,255,.07); }
.railtabs__btn.is-active { color: #fff; background: var(--c-accent); }

/* ===================== FORM PANE ===================== */
.formpane { background: #fff; border-right: 1px solid var(--c-line); overflow-y: auto; padding: 24px 22px 60px; }
.panel { display: none; }
.panel.is-active { display: block; animation: fadein .14s ease; }
@keyframes fadein { from { opacity:0; transform:translateY(3px); } to { opacity:1; transform:none; } }
.panel__head { margin-bottom: 18px; }
.panel__head h2 { font-size: 17px; font-weight: 700; letter-spacing: -.01em; }
.panel__head p { font-size: 12px; color: var(--c-body-soft); margin-top: 4px; line-height: 1.5; }
.subhead { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--c-body-soft); font-weight: 700; margin: 0 0 10px; }

/* Fields */
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 10px; }
.field { display: flex; flex-direction: column; gap: 5px; font-size: 12px; font-weight: 600; color: var(--c-body-soft); }
.field--wide { grid-column: 1 / -1; }
.field input[type="text"], .field input[type="email"], .field input[type="number"], .field input[type="date"], .field textarea, .field select { font: 400 13px/1.4 var(--font-ui); color: var(--c-body-text); padding: 8px 9px; border: 1px solid var(--c-line); border-radius: var(--radius-sm); background: #fff; resize: vertical; }
.field input:focus-visible, .field textarea:focus-visible, .field select:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 1px; border-color: var(--c-accent); }
.field input[type="file"] { font-size: 11.5px; padding: 5px 0; color: var(--c-body-soft); border: none; }

/* Color fields */
.color-input-wrap { display: flex; gap: 6px; align-items: center; }
.color-input-wrap input[type="color"] { width: 38px; height: 32px; padding: 2px; border: 1px solid var(--c-line); border-radius: var(--radius-sm); background: #fff; cursor: pointer; flex-shrink: 0; }
.hex-input { font-family: var(--font-mono) !important; font-size: 12px !important; padding: 6px 8px !important; flex: 1; min-width: 0; }
.field-divider { grid-column: 1 / -1; font-size: 10.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--c-accent-ink); border-top: 1px solid var(--c-line); padding-top: 12px; margin-top: 4px; }
.custom-colors { display: none; }
.custom-colors.is-visible { display: block; }

/* Layout presets */
.layout-presets { display: flex; gap: 10px; flex-wrap: wrap; }
.layout-preset { display: flex; flex-direction: column; align-items: center; gap: 6px; background: none; border: 2px solid var(--c-line); border-radius: var(--radius-md); padding: 8px 10px; font-size: 11px; font-weight: 600; color: var(--c-body-soft); transition: border-color .15s, color .15s; }
.layout-preset:hover { border-color: var(--c-accent); color: var(--c-accent-ink); }
.layout-preset.is-active { border-color: var(--c-accent); color: var(--c-accent-ink); background: var(--c-accent-soft); }
.layout-preset__thumb { width: 52px; height: 38px; border-radius: 3px; border: 1px solid var(--c-line); position: relative; overflow: hidden; background: #fff; }
.layout-preset__thumb--classic::before { content:''; position:absolute; inset:0 0 auto; height:10px; background:#2f6f5e; }
.layout-preset__thumb--classic::after  { content:''; position:absolute; left:4px; right:4px; top:14px; height:1px; background:#ddd; box-shadow:0 4px 0 #ddd, 0 8px 0 #ddd, 0 12px 0 #ddd; }
.layout-preset__thumb--modern::before  { content:''; position:absolute; left:0; inset-block:0; width:12px; background:#1e4a3e; }
.layout-preset__thumb--modern::after   { content:''; position:absolute; left:16px; right:4px; top:6px; height:1px; background:#ddd; box-shadow:0 5px 0 #ddd, 0 10px 0 #ddd; }
.layout-preset__thumb--minimal::before { content:''; position:absolute; inset:0 0 auto; height:2px; background:#2f6f5e; }
.layout-preset__thumb--minimal::after  { content:''; position:absolute; left:4px; right:4px; top:10px; height:1px; background:#ddd; box-shadow:0 5px 0 #ddd, 0 10px 0 #ddd, 0 15px 0 #ddd; }
.layout-preset__thumb--bold::before    { content:''; position:absolute; inset:0 0 55%; background:#1e4a3e; }
.layout-preset__thumb--bold::after     { content:''; position:absolute; left:4px; right:4px; top:20px; height:1px; background:#ddd; box-shadow:0 4px 0 #ddd, 0 8px 0 #ddd; }

/* Palette presets */
.palette-presets { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.palette-btn { display: flex; gap: 0; border-radius: 50px; border: 2px solid transparent; overflow: hidden; padding: 0; background: none; transition: border-color .15s; cursor: pointer; }
.palette-btn span { display: block; width: 18px; height: 18px; }
.palette-btn:hover { border-color: var(--c-accent); }
.palette-btn.is-active { border-color: var(--c-accent); box-shadow: 0 0 0 2px var(--c-accent-soft); }

/* Stamp/range editor */
.stamp-editor { display: flex; flex-direction: column; gap: 24px; }
.stamp-editor__group h3 { font-size: 13px; display: flex; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--c-accent-ink); }
.range-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 10px; }
.range-row label { display: flex; flex-direction: column; gap: 4px; font-size: 11px; color: var(--c-body-soft); font-weight: 600; flex: 1; min-width: 100px; }
.range-row input[type="range"] { accent-color: var(--c-accent); }

/* Signer placeholder */
.signer-preview-hint { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 40px 20px; gap: 12px; color: var(--c-body-soft); text-align: center; border: 2px dashed var(--c-line); border-radius: var(--radius-lg); margin-top: 16px; }
.signer-preview-hint i { font-size: 36px; color: var(--c-line); }
.signer-preview-hint p { font-size: 13px; line-height: 1.6; }

/* Line items */
.lineitem-editor { border: 1px solid var(--c-line); border-radius: var(--radius-md); overflow: hidden; background: #fff; }
.lineitem-editor__head, .lineitem-row { display: grid; grid-template-columns: 1fr 60px 50px 90px 84px 28px; gap: 6px; align-items: center; padding: 7px 8px; }
.lineitem-editor__head { background: var(--c-canvas-2); font-size: 10px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--c-body-soft); }
.lineitem-row { border-top: 1px solid var(--c-line); }
.lineitem-row input { width: 100%; border: 1px solid transparent; background: transparent; padding: 5px 5px; border-radius: var(--radius-sm); font-size: 12.5px; color: var(--c-body-text); }
.lineitem-row input:focus-visible { outline: none; border-color: var(--c-accent); background: #fff; }
.lineitem-row input[type="number"] { text-align: right; font-family: var(--font-mono); font-size: 12px; }
.lineitem-row .col-total { font-family: var(--font-mono); font-size: 12px; text-align: right; padding-right: 4px; color: var(--c-body-soft); }
.lineitem-row .row-del { border: none; background: none; color: var(--c-body-soft); width: 22px; height: 22px; border-radius: var(--radius-sm); font-size: 13px; }
.lineitem-row .row-del:hover { background: var(--c-danger-soft); color: var(--c-danger); }

/* ===================== PREVIEW PANE ===================== */
.previewpane { background: var(--c-canvas); display: flex; flex-direction: column; min-width: 0; overflow: hidden; }
.previewpane__toolbar { display: flex; align-items: center; justify-content: space-between; padding: 10px 20px; font-size: 12px; font-weight: 600; color: var(--c-body-soft); border-bottom: 1px solid var(--c-line); background: var(--c-canvas); position: sticky; top: 0; z-index: 5; flex-shrink: 0; }
.previewpane__toolbar i { color: var(--c-accent); margin-right: 5px; }
.preview-toolbar-right { display: flex; align-items: center; gap: 14px; }
.previewpane__hint { font-weight: 400; color: #8A96A0; font-size: 11.5px; }
.zoom-control { display: flex; align-items: center; gap: 7px; font-size: 11px; color: var(--c-body-soft); }
.zoom-control input[type="range"] { width: 80px; accent-color: var(--c-accent); }
.preview-scroll { flex: 1; overflow: auto; display: flex; justify-content: center; align-items: flex-start; padding: 32px 28px 60px; }

/* Sheet wrapper zoom */
.sheet-wrapper { transform-origin: top center; transform: scale(var(--preview-zoom)); transition: transform .15s ease; }
.sheet-wrapper.is-hidden { display: none; }

/* Fix: compensate for scale shrinkage so scroll area has correct height */
.sheet-wrapper::after { content: ''; display: block; height: calc((1 - var(--preview-zoom)) * 297mm * -1); }

/* ===================== INVOICE SHEET ===================== */
.sheet {
  position: relative; width: 210mm; min-height: 297mm;
  background: var(--c-page-bg); box-shadow: var(--shadow-sheet);
  padding: 18mm 15mm 20mm; color: var(--c-body-text);
  font-size: 12.5px; line-height: 1.55; font-family: var(--font-serif);
}
.sheet.font-sans     { font-family: var(--font-ui); }
.sheet.font-playfair { font-family: var(--font-playfair); }
.sheet.font-mono     { font-family: var(--font-mono); font-size: 11.5px; }
.sheet.density-compact .sheet__table tbody td { padding: 5px 9px; font-size: 11px; }
.sheet.density-compact .sheet__table thead th { padding: 6px 9px; }
.sheet.radius-soft  { --tbl-radius: 6px; }
.sheet.radius-round { --tbl-radius: 12px; }
.sheet.logo-sm .sheet__logo { width: 40px; height: 40px; }
.sheet.logo-lg .sheet__logo { width: 96px; height: 96px; }
.sheet__muted  { color: var(--c-body-soft); font-size: 11px; }
.sheet__strong { font-weight: 700; }

/* Sidebar accent (layout-modern only) */
.sheet__sidebar-accent { display: none; }

/* ── LAYOUT: CLASSIC ── */
.sheet__header { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; padding: 14px 16px; margin: -18mm -15mm 16px; background: var(--c-dark); color: var(--c-header-text); }
.sheet__header .sheet__muted { color: rgba(255,255,255,.6); }
.sheet__brand { display: flex; gap: 12px; align-items: flex-start; }
.sheet__logo { width: var(--logo-size); height: var(--logo-size); object-fit: contain; border-radius: 3px; }
.sheet__brand-text h2 { font-family: inherit; font-size: 18px; font-weight: 700; letter-spacing: -.01em; color: var(--c-header-text); }
.sheet__contact-line span { margin-right: 10px; }
.sheet__docmeta { text-align: right; flex-shrink: 0; }
.sheet__doctitle { display: inline-block; font-family: var(--font-ui); font-size: 10px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--c-dark); background: var(--c-header-text); padding: 4px 9px; border-radius: 3px; margin-bottom: 10px; }
.sheet__metalist { display: grid; grid-template-columns: auto auto; gap: 2px 12px; justify-content: end; list-style: none; margin: 0; padding: 0; }
.sheet__metalist > div { display: contents; }
.sheet__metalist dt { font-family: var(--font-ui); font-size: 9.5px; text-transform: uppercase; letter-spacing: .06em; color: rgba(255,255,255,.55); text-align: right; }
.sheet__metalist dd { margin: 0; font-family: var(--font-mono); font-size: 11.5px; color: var(--c-header-text); text-align: right; min-width: 80px; }

/* ── LAYOUT: MODERN ── */
.sheet.layout-modern { padding-left: calc(15mm + 18px); }
.sheet.layout-modern .sheet__sidebar-accent { display: block; position: absolute; left: 0; top: 0; bottom: 0; width: 14px; background: var(--c-dark); }
.sheet.layout-modern .sheet__header { margin-left: calc(-15mm - 18px + 14px); margin-right: -15mm; margin-top: -18mm; background: transparent; border-bottom: 2px solid var(--c-accent); color: var(--c-body-text); padding-left: 16px; }
.sheet.layout-modern .sheet__header .sheet__muted { color: var(--c-body-soft); }
.sheet.layout-modern .sheet__brand-text h2 { color: var(--c-dark); }
.sheet.layout-modern .sheet__doctitle { background: var(--c-accent); color: #fff; }
.sheet.layout-modern .sheet__metalist dt { color: var(--c-body-soft); }
.sheet.layout-modern .sheet__metalist dd { color: var(--c-body-text); }

/* ── LAYOUT: MINIMAL ── */
.sheet.layout-minimal .sheet__header { background: transparent; border-bottom: 2.5px solid var(--c-accent); color: var(--c-body-text); padding: 0 0 14px; margin: 0 0 16px; }
.sheet.layout-minimal .sheet__header .sheet__muted { color: var(--c-body-soft); }
.sheet.layout-minimal .sheet__brand-text h2 { color: var(--c-dark); font-size: 20px; }
.sheet.layout-minimal .sheet__doctitle { background: var(--c-dark); color: #fff; }
.sheet.layout-minimal .sheet__metalist dt { color: var(--c-body-soft); }
.sheet.layout-minimal .sheet__metalist dd { color: var(--c-body-text); }

/* ── LAYOUT: BOLD ── */
.sheet.layout-bold .sheet__header { margin: -18mm -15mm 20px; background: var(--c-dark); padding: 22px 18px; flex-direction: column; gap: 14px; }
.sheet.layout-bold .sheet__brand-text h2 { font-size: 22px; letter-spacing: -.02em; }
.sheet.layout-bold .sheet__docmeta { text-align: left; }
.sheet.layout-bold .sheet__metalist { justify-content: start; }
.sheet.layout-bold .sheet__metalist dt { text-align: left; }
.sheet.layout-bold .sheet__metalist dd { text-align: left; }
.sheet.layout-bold .sheet__doctitle { background: var(--c-accent); color: #fff; margin-bottom: 8px; }

.sheet.watermark-off .sheet__doctitle { display: none; }

/* Bill-to */
.sheet__billto { padding: 12px 0; border-bottom: 1px solid var(--c-line); margin-bottom: 12px; }
.sheet__billto h3 { font-family: var(--font-ui); font-size: 9.5px; text-transform: uppercase; letter-spacing: .08em; color: var(--c-body-soft); margin-bottom: 5px; }
.sheet__delivery-terms { font-size: 11px; color: var(--c-body-soft); margin-bottom: 10px; padding: 6px 10px; background: var(--c-table-stripe); border-radius: var(--radius-sm); }

/* Table */
.sheet__table { width: 100%; border-collapse: separate; border-spacing: 0; border-radius: var(--tbl-radius); overflow: hidden; }
.sheet__table thead th { font-family: var(--font-ui); font-size: 10px; text-transform: uppercase; letter-spacing: .05em; color: var(--c-header-text); background: var(--c-dark); text-align: left; padding: 8px 9px; }
.sheet__table th.ta-num, .sheet__table td.ta-num { text-align: right; }
.sheet__table th.ta-unit, .sheet__table td.ta-unit { text-align: center; }
.sheet__table tbody td { padding: 8px 9px; border-bottom: 1px solid var(--c-line); font-size: 12px; }
.sheet__table tbody tr:nth-child(even) td { background: var(--c-table-stripe); }
.sheet__table td.ta-num { font-family: var(--font-mono); font-size: 11.5px; }

/* Totals */
.sheet__totals { display: flex; justify-content: flex-end; margin-top: 14px; }
.sheet__totals-list { width: 260px; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--c-line); padding-top: 8px; }
.sheet__totals-list > div { display: flex; justify-content: space-between; padding: 4px 0; font-size: 12px; }
.sheet__totals-list dt { color: var(--c-body-soft); font-family: var(--font-ui); font-weight: 500; }
.sheet__totals-list dd { margin: 0; font-family: var(--font-mono); }
.sheet__grandtotal { border-top: 2px solid var(--c-accent); margin-top: 5px; padding-top: 7px !important; font-weight: 700; font-size: 14px !important; color: var(--c-dark); }
.sheet__grandtotal dt { color: var(--c-dark); font-weight: 700; }

/* Notes / bank */
.sheet__notes, .sheet__bank { margin-top: 16px; padding-top: 10px; border-top: 1px solid var(--c-line); }
.sheet__notes h3, .sheet__bank h3 { font-family: var(--font-ui); font-size: 9.5px; text-transform: uppercase; letter-spacing: .08em; color: var(--c-body-soft); margin-bottom: 5px; }
.sheet__notes p, .sheet__bank p { font-size: 11.5px; color: var(--c-body-soft); white-space: pre-line; }

/* Signature / footer */
.sheet__footer { margin-top: 36px; display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; }
.sheet__signblock { text-align: center; min-width: 180px; }
.sheet__signimg-wrap { height: 56px; display: flex; align-items: flex-end; justify-content: center; }
.sheet__signimg-wrap img { max-height: 54px; max-width: 190px; object-fit: contain; }
.sheet__signline { border-top: 1px solid var(--c-body-text); margin-top: 4px; }
.sheet__signblock p { margin-top: 5px; font-size: 10.5px; }
.sheet__thankyou { font-size: 10px; color: var(--c-body-soft); max-width: 240px; text-align: right; font-style: italic; }
.sheet__stamp { position: absolute; pointer-events: none; object-fit: contain; transform-origin: center; }

/* ===================== SIGNER SHEET ===================== */
.signer-sheet { position: relative; width: 210mm; min-height: 297mm; background: #fff; box-shadow: var(--shadow-sheet); display: flex; align-items: stretch; justify-content: stretch; overflow: hidden; }
.signer-sheet #signerDocImg { width: 100%; height: 100%; object-fit: contain; display: block; }
.signer-placeholder { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; color: var(--c-body-soft); background: #f8f8f8; }
.signer-placeholder i { font-size: 52px; color: var(--c-line); }
.signer-placeholder p { font-size: 14px; text-align: center; line-height: 1.6; }
.signer-overlay { position: absolute; pointer-events: none; object-fit: contain; transform-origin: center; }

/* ===================== SCAN EFFECT ===================== */
.scan-effect { filter: sepia(14%) contrast(95%) brightness(97%); }
.scan-grain::after { content: ''; position: absolute; inset: 0; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E"); pointer-events: none; mix-blend-mode: multiply; opacity: .5; }

/* ===================== TOAST ===================== */
.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 10px); background: var(--c-dark); color: #fff; font-size: 13px; font-weight: 600; padding: 10px 18px; border-radius: var(--radius-md); box-shadow: 0 10px 30px rgba(0,0,0,.22); opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease; z-index: 999; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 1100px) { .app__body { grid-template-columns: 60px minmax(300px, 380px) 1fr; } }
@media (max-width: 860px) {
  .app__body { grid-template-columns: 1fr; overflow: visible; }
  .railtabs { flex-direction: row; overflow-x: auto; border-right: none; border-bottom: 1px solid rgba(255,255,255,.08); padding: 8px; }
  .railtabs__btn { flex-direction: row; padding: 8px 12px; font-size: 12px; }
  .formpane { border-right: none; border-bottom: 1px solid var(--c-line); max-height: 55vh; }
  .field-grid { grid-template-columns: 1fr; }
  .sheet, .signer-sheet { width: 100%; padding: 8mm; min-height: auto; }
  .sheet-wrapper { transform: none !important; }
}
@media print { .topbar, .railtabs, .formpane, .previewpane__toolbar, .toast { display: none !important; } .sheet { box-shadow: none; } }