:root {
  --bg: #f6f3f8;
  --panel: #ffffff;
  --ink: #24142e;
  --muted: #64586e;
  --brand: #7b3f97;
  --brand-dark: #5b2b76;
  --line: #ddd3e4;
  --shadow: 0 12px 30px rgba(48, 26, 64, 0.08);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); font-family: Arial, Helvetica, sans-serif; }
a { color: var(--brand); }
.app-shell { min-height: 100vh; display: flex; flex-direction: column; }
.topbar { background: linear-gradient(90deg, var(--brand-dark), var(--brand)); color: #fff; padding: 18px 20px; display: flex; align-items: center; justify-content: space-between; gap: 16px; box-shadow: var(--shadow); }
.topbar h1, .topbar h2 { margin: 0; font-size: clamp(18px, 2.4vw, 28px); }
.topbar p { margin: 4px 0 0; opacity: .88; }
.topbar .meta { color: rgba(255,255,255,.72); }
.topbar .actions { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: 10px; padding: 11px 16px; font-weight: 700; text-decoration: none; cursor: pointer; }
.btn.primary { background: #fff; color: var(--brand-dark); }
.btn.secondary { background: rgba(255,255,255,.14); color: #fff; border: 1px solid rgba(255,255,255,.22); }
.content { width: 100%; margin: 0; padding: 0; }
.grid { display: grid; gap: 18px; }
.cards { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card, .panel { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow); }
.card { padding: 18px; display: flex; flex-direction: column; gap: 10px; }
.card h3 { margin: 0; font-size: 18px; }
.meta { color: var(--muted); font-size: 14px; line-height: 1.45; }
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; }
.pill { font-size: 12px; background: #f2e9f8; color: var(--brand-dark); border-radius: 999px; padding: 6px 10px; }
body[data-page="sign"] .app-shell { height: 100vh; overflow: hidden; }
body[data-page="sign"] .content { flex: 1; min-height: 0; }
.layout { grid-template-columns: 104px minmax(0, 1fr) 360px; align-items: stretch; gap: 0; }
.layout > .panel { min-height: 0; border-radius: 0; box-shadow: none; }
.viewer { padding: 0; overflow: hidden; background: #292929; border-width: 0 1px; }
.viewer iframe, .viewer object { width: 100%; height: 100%; min-height: 60vh; border: 0; border-radius: 0; background: #fff; display:block; }
.fields { padding: 18px; overflow: auto; background: #fff; }
.fields h3, .fields h4 { margin: 0 0 10px; }
.thumb-rail { padding: 12px 8px; overflow-x: hidden; overflow-y: auto; background: #f4f1f6; border-left: 0; }
.thumb-rail-inner { display: flex; flex-direction: column; gap: 12px; align-items: center; }
.thumb-chip { width: 84px; margin: 0; padding: 5px; border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--muted); font: 700 12px/1.2 Arial, Helvetica, sans-serif; display: flex; flex-direction: column; gap: 5px; align-items: center; justify-content: center; cursor: pointer; }
.thumb-chip canvas { width: 72px; height: auto; display: block; background: #fff; border: 1px solid #d8d0dc; box-shadow: 0 2px 8px rgba(32, 21, 39, .12); }
.thumb-chip.active { background: #eadff0; color: var(--brand-dark); border-color: #d7c3e2; }
.thumb-chip:focus { outline: none; }
.thumb-chip:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
#pdf-viewer { height: 100%; min-height: 0; display: flex; flex-direction: column; }
.pdf-viewer-toolbar { min-height: 48px; padding: 0 14px; display: flex; align-items: center; justify-content: space-between; gap: 14px; color: #fff; background: #3b3b3b; border-bottom: 1px solid #4a4a4a; font-size: 13px; }
.pdf-toolbar-title { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 700; }
.pdf-toolbar-controls { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.pdf-tool-button { width: 30px; height: 30px; padding: 0; border: 1px solid transparent; border-radius: 6px; background: transparent; color: #fff; font: 700 18px/1 Arial, Helvetica, sans-serif; cursor: pointer; }
.pdf-tool-button:hover, .pdf-tool-button:focus-visible { background: #505050; border-color: #666; outline: none; }
.pdf-zoom-label { min-width: 46px; text-align: center; font-variant-numeric: tabular-nums; }
.pdf-document-scroll { flex: 1; min-height: 0; overflow: auto; padding: 24px; scroll-behavior: smooth; }
.pdf-document { display: flex; flex-direction: column; align-items: center; gap: 22px; min-width: max-content; }
.pdf-page { position: relative; flex: 0 0 auto; background: #fff; box-shadow: 0 4px 18px rgba(0, 0, 0, .38); }
.pdf-page canvas { display: block; }
.pdf-field-layer { position: absolute; inset: 0; pointer-events: none; overflow: hidden; color: #111; }
.pdf-field-preview { position: absolute; margin: 0; padding: 0; overflow: hidden; color: #111; font-family: Arial, Helvetica, sans-serif; line-height: 1.05; white-space: nowrap; text-overflow: clip; }
.pdf-field-preview.textarea { white-space: pre-wrap; }
.pdf-field-preview.signature-text { font-family: Georgia, "Times New Roman", serif; font-style: italic; line-height: 1; }
.pdf-field-preview.signature-image { object-fit: contain; object-position: left center; }
.pdf-loading, .pdf-error { margin: auto; max-width: 520px; padding: 24px; color: #fff; text-align: center; line-height: 1.5; }
.pdf-error a { color: #ead7f5; }
.fieldset { border-top: 1px solid var(--line); padding-top: 14px; margin-top: 14px; }
.field { margin-bottom: 14px; }
.field label { display:block; font-weight: 700; margin-bottom: 6px; }
.field small { display:block; color: var(--muted); margin-top: 4px; line-height: 1.35; }
.field input[type="text"], .field input[type="date"], .field textarea, .field select { width: 100%; border: 1px solid #d8cbe2; border-radius: 10px; padding: 11px 12px; font-size: 15px; background: #fff; }
.field textarea { min-height: 92px; resize: vertical; }
.choice-group { display:flex; flex-wrap:wrap; gap: 8px; }
.choice { display:flex; gap:6px; align-items:center; background:#faf7fc; border:1px solid #e7dff0; padding:8px 10px; border-radius:999px; }
.signature-box { border: 1px dashed #c6b4d5; background: #fcfbfd; border-radius: 12px; padding: 12px; }
.signature-tabs { display:flex; gap:8px; margin-bottom: 10px; }
.signature-tabs button { border:1px solid #d9c8e8; background:#fff; color:var(--brand-dark); padding:8px 10px; border-radius:999px; font-weight:700; }
.signature-tabs button.active { background:var(--brand-dark); color:#fff; border-color:var(--brand-dark); }
.signature-pad { width: 100%; height: 180px; border: 1px solid #e2d8eb; background: #fff; border-radius: 10px; display:block; touch-action:none; user-select:none; -webkit-user-select:none; }
.signature-controls { display:flex; gap:8px; flex-wrap:wrap; margin-top: 10px; }
.footer-note { color: var(--muted); font-size: 13px; margin-top: 10px; }
.status-line.is-hidden { display: none; }
.status-line {
  padding: 10px 12px;
  border-radius: 10px;
  background: #f7f2fb;
  border: 1px solid #e3d8ef;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.status-line[data-state="error"] {
  background: #fff2f7;
  border-color: #f0b9cd;
  color: #a51f5f !important;
}
.status-line[data-state="success"] {
  background: #f2fbf5;
  border-color: #c4ebcf;
  color: #1f6a38 !important;
}
.toolbar { display:flex; flex-wrap:wrap; gap:10px; margin-top: 14px; }
.toolbar.primary { margin-top: 18px; }
.toolbar.secondary { margin-top: 10px; }
.btn.brand { background: var(--brand); color: #fff; }
.btn.ghost { background: #f7f0fb; color: var(--brand-dark); }
@media (max-width: 1100px) {
  .layout { grid-template-columns: 88px minmax(0, 1fr) 320px; }
  .thumb-chip { width: 70px; }
  .thumb-chip canvas { width: 62px; }
  .fields { padding: 15px; }
}
@media (max-width: 900px) {
  body[data-page="sign"] .app-shell { height: auto; min-height: 100vh; overflow: visible; }
  .layout { grid-template-columns: 76px minmax(0, 1fr); }
  .viewer { min-height: 72vh; }
  .fields { grid-column: 1 / -1; max-height: none; }
  .thumb-chip { width: 62px; }
  .thumb-chip canvas { width: 54px; }
}
@media (max-width: 640px) {
  .topbar { padding: 14px; }
  .layout { grid-template-columns: 1fr; }
  .thumb-rail { display: none; }
  .pdf-viewer-toolbar { padding: 0 10px; }
  .pdf-document-scroll { padding: 14px; }
  .viewer { min-height: 68vh; }
  .card, .panel { border-radius: 0; }
}