:root {
  --pdf-accent: #ff8a00;
  --pdf-accent-2: #ffa726;
  --pdf-accent-soft: rgba(255, 138, 0, 0.14);
  --pdf-accent-line: rgba(255, 138, 0, 0.55);
  --pdf-surface: rgba(255, 255, 255, 0.03);
  --pdf-surface-2: rgba(255, 255, 255, 0.05);
  --pdf-border: rgba(255, 255, 255, 0.08);
  --pdf-border-strong: rgba(255, 255, 255, 0.16);
  --pdf-text: rgba(255, 255, 255, 0.88);
  --pdf-text-dim: rgba(255, 255, 255, 0.62);
  --pdf-radius: 14px;
}

.pdf-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.1rem 1.25rem 3rem;
}

.pdf-back {
  color: rgba(255, 255, 255, 0.45);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}
.pdf-back:hover { color: var(--pdf-accent-2); }

/* ---------- Hero ---------- */
.pdf-hero {
  text-align: center;
  padding: 1.4rem 0 1.2rem;
}
.pdf-hero-kicker {
  display: inline-block;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pdf-accent-2);
  margin-bottom: 0.45rem;
}
.pdf-hero-title {
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  font-weight: 800;
  margin: 0 0 0.5rem;
  background: linear-gradient(135deg, var(--pdf-accent), var(--pdf-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.pdf-hero-sub {
  color: var(--pdf-text-dim);
  margin: 0 auto;
  max-width: 620px;
  font-size: 0.96rem;
  line-height: 1.5;
}
.pdf-hero-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
}
.pdf-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.74rem;
  color: var(--pdf-text-dim);
  border: 1px solid var(--pdf-border);
  background: var(--pdf-surface);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
}
.pdf-chip-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: linear-gradient(135deg, var(--pdf-accent), var(--pdf-accent-2));
  box-shadow: 0 0 8px rgba(255, 138, 0, 0.6);
}

/* ---------- Upload ---------- */
.pdf-upload-zone {
  border: 2px dashed var(--pdf-border-strong);
  border-radius: 18px;
  padding: 3rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s ease;
  background:
    radial-gradient(circle at 50% 0%, rgba(255, 138, 0, 0.06), transparent 60%),
    var(--pdf-surface);
  max-width: 760px;
  margin: 0.5rem auto 0;
}
.pdf-upload-zone:hover,
.pdf-upload-zone.dragover {
  border-color: var(--pdf-accent-line);
  background: var(--pdf-accent-soft);
  transform: translateY(-2px);
}
.pdf-upload-icon svg {
  width: 42px; height: 42px;
  stroke: var(--pdf-accent-2); fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  margin-bottom: 0.5rem;
}
.pdf-upload-zone strong { color: #fff; display: block; margin-bottom: 0.35rem; font-size: 1.05rem; }
.pdf-upload-zone p { color: var(--pdf-text-dim); margin: 0; font-size: 0.88rem; }
.pdf-upload-hint { display: block; margin-top: 0.6rem; font-size: 0.78rem; color: var(--pdf-accent-2); }

/* ---------- Workspace grid ---------- */
.pdf-workspace { display: none; gap: 0.9rem; margin-top: 1rem; }
.pdf-workspace.is-ready {
  display: grid;
  grid-template-columns: 188px minmax(0, 1fr) 286px;
  align-items: start;
}
.pdf-workspace.rail-collapsed.is-ready { grid-template-columns: 46px minmax(0, 1fr) 286px; }
.pdf-main { min-width: 0; }

/* ---------- Glass panels ---------- */
.pdf-rail, .pdf-side {
  border: 1px solid var(--pdf-border);
  border-radius: var(--pdf-radius);
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 138, 0, 0.05), transparent 45%),
    var(--pdf-surface);
  backdrop-filter: blur(8px);
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.25);
}

/* ---------- Thumbnail rail ---------- */
.pdf-rail { position: sticky; top: 10px; max-height: calc(100vh - 24px); display: flex; flex-direction: column; }
.pdf-rail-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.7rem 0.8rem; border-bottom: 1px solid var(--pdf-border);
}
.pdf-rail-head h3 { margin: 0; font-size: 0.82rem; color: #fff; }
.pdf-rail-toggle {
  border: 1px solid var(--pdf-border); background: var(--pdf-surface-2);
  color: var(--pdf-text-dim); border-radius: 7px; width: 24px; height: 24px;
  cursor: pointer; font-size: 0.7rem; line-height: 1;
}
.pdf-rail-toggle:hover { color: #fff; border-color: var(--pdf-border-strong); }
.pdf-rail-body { padding: 0.6rem; overflow-y: auto; flex: 1; display: flex; flex-direction: column; gap: 0.6rem; }
.pdf-rail-foot { padding: 0.6rem; border-top: 1px solid var(--pdf-border); }
.rail-collapsed .pdf-rail-head h3,
.rail-collapsed .pdf-rail-body,
.rail-collapsed .pdf-rail-foot { display: none; }

.thumb-item {
  position: relative; border: 1px solid var(--pdf-border); border-radius: 9px;
  overflow: hidden; cursor: pointer; background: rgba(0, 0, 0, 0.25);
  transition: border-color 0.18s, box-shadow 0.18s, transform 0.18s;
}
.thumb-item:hover { border-color: var(--pdf-border-strong); }
.thumb-item.active { border-color: var(--pdf-accent-line); box-shadow: 0 0 0 1px var(--pdf-accent-line), 0 0 16px rgba(255, 138, 0, 0.25); }
.thumb-item.dragging { opacity: 0.5; }
.thumb-item.drop-target { border-color: var(--pdf-accent-2); box-shadow: 0 -3px 0 var(--pdf-accent-2) inset; }
.thumb-item canvas { display: block; width: 100%; height: auto; }
.thumb-num {
  position: absolute; left: 5px; bottom: 5px; font-size: 0.66rem;
  background: rgba(0, 0, 0, 0.7); color: #fff; border-radius: 5px; padding: 0.05rem 0.35rem;
}
.thumb-actions {
  position: absolute; top: 4px; right: 4px; display: flex; gap: 3px;
  opacity: 0; transition: opacity 0.18s;
}
.thumb-item:hover .thumb-actions { opacity: 1; }
.thumb-actions button {
  width: 22px; height: 22px; border-radius: 6px; cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.2); background: rgba(15, 23, 42, 0.92);
  color: #fff; font-size: 0.66rem; line-height: 1; display: grid; place-items: center;
}
.thumb-actions button:hover { background: var(--pdf-accent); border-color: transparent; }

/* ---------- Toolbar ---------- */
.pdf-toolbar {
  display: flex; flex-wrap: wrap; gap: 0.45rem; align-items: center;
  padding: 0.65rem; border-radius: 12px; border: 1px solid var(--pdf-border);
  background: var(--pdf-surface-2); margin-bottom: 0.7rem;
}
.pdf-group {
  display: inline-flex; gap: 0.3rem; align-items: center; flex-wrap: wrap;
  padding-right: 0.45rem; border-right: 1px solid var(--pdf-border);
}
.pdf-group:last-of-type { border-right: 0; }
.pdf-tool-btn {
  display: inline-flex; align-items: center; gap: 0.35rem;
  border: 1px solid var(--pdf-border-strong); background: var(--pdf-surface-2);
  color: var(--pdf-text); border-radius: 9px; padding: 0.42rem 0.6rem;
  font-size: 0.78rem; cursor: pointer; transition: 0.16s ease; position: relative;
}
.pdf-tool-btn.icon-only { padding: 0.42rem 0.55rem; min-width: 32px; justify-content: center; }
.pdf-tool-btn:hover { border-color: var(--pdf-accent-line); color: #fff; transform: translateY(-1px); }
.pdf-tool-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.pdf-tool-btn.active {
  background: linear-gradient(135deg, var(--pdf-accent), var(--pdf-accent-2));
  border-color: transparent; color: #1a0f00; font-weight: 700;
  box-shadow: 0 4px 14px rgba(255, 138, 0, 0.3);
}
.pdf-tool-btn svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.pdf-tool-btn.primary {
  background: linear-gradient(135deg, #22c55e, #16a34a); border-color: transparent;
  color: #fff; font-weight: 700;
}
.pdf-tool-btn .pdf-key {
  font-size: 0.6rem; opacity: 0.6; border: 1px solid currentColor; border-radius: 4px;
  padding: 0 0.2rem; margin-left: 0.1rem;
}
.pdf-toolbar-spacer { flex: 1; }
.pdf-status {
  font-size: 0.76rem; color: var(--pdf-text-dim);
  border: 1px solid var(--pdf-border); border-radius: 999px; padding: 0.24rem 0.7rem;
}
.pdf-status.busy { color: #fff; border-color: var(--pdf-accent-line); background: var(--pdf-accent-soft); }

/* ---------- Canvas ---------- */
.pdf-canvas-wrap {
  border: 1px solid var(--pdf-border); border-radius: 12px;
  background:
    repeating-linear-gradient(45deg, rgba(255,255,255,0.012) 0 12px, transparent 12px 24px),
    rgba(0, 0, 0, 0.2);
  padding: 1rem; max-height: 74vh; overflow: auto;
}
.canvas-stage { position: relative; width: fit-content; margin: 0 auto; box-shadow: 0 12px 40px rgba(0,0,0,0.4); }
#pdfCanvas, #annotationCanvas { display: block; margin: 0 auto; }
#annotationCanvas { position: absolute; inset: 0; touch-action: none; }

.form-field-layer { position: absolute; inset: 0; pointer-events: none; }
.form-field-layer.show { pointer-events: auto; }
.form-field-layer input,
.form-field-layer .ff-check {
  position: absolute; box-sizing: border-box;
  border: 1.5px solid var(--pdf-accent-line); background: rgba(255, 244, 224, 0.55);
  color: #111; font-size: 12px; border-radius: 3px; padding: 1px 3px;
}
.form-field-layer .ff-check { display: grid; place-items: center; cursor: pointer; background: rgba(255,244,224,0.65); }

.text-input-overlay { position: absolute; display: none; z-index: 5; }
.text-input-overlay textarea {
  border: 2px solid var(--pdf-accent); border-radius: 6px; background: rgba(255, 255, 255, 0.97);
  color: #000; min-width: 180px; min-height: 44px; font-size: 14px; padding: 0.4rem 0.5rem; resize: both;
}

.page-nav { margin-top: 0.8rem; display: flex; justify-content: center; align-items: center; gap: 0.75rem; }
.page-nav button {
  border: 1px solid var(--pdf-border-strong); border-radius: 8px; background: var(--pdf-surface-2);
  color: #fff; font-size: 0.82rem; padding: 0.42rem 0.85rem; cursor: pointer; transition: 0.16s;
}
.page-nav button:hover:not(:disabled) { border-color: var(--pdf-accent-line); }
.page-nav button:disabled { opacity: 0.4; cursor: not-allowed; }
.page-nav span { color: var(--pdf-text-dim); font-size: 0.85rem; }

/* ---------- Inspector / accordion ---------- */
.pdf-side { position: sticky; top: 10px; padding: 0.4rem; max-height: calc(100vh - 24px); overflow-y: auto; }
.pdf-acc { border-bottom: 1px solid var(--pdf-border); }
.pdf-acc:last-child { border-bottom: 0; }
.pdf-acc-head {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  background: transparent; border: 0; color: #fff; font-size: 0.86rem; font-weight: 600;
  padding: 0.7rem 0.6rem; cursor: pointer;
}
.pdf-acc-caret { transition: transform 0.2s; color: var(--pdf-text-dim); }
.pdf-acc-body { padding: 0 0.6rem 0.8rem; display: none; }
.pdf-acc[data-acc-open="true"] .pdf-acc-body { display: block; }
.pdf-acc[data-acc-open="true"] .pdf-acc-caret { transform: rotate(180deg); }

.pdf-inspector-hint { color: var(--pdf-text-dim); font-size: 0.74rem; line-height: 1.4; margin: 0.3rem 0 0.6rem; }
.prop-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.55rem; }
.prop-grid label, .pdf-field-label { display: block; color: var(--pdf-text-dim); font-size: 0.74rem; }
.prop-grid input, .pdf-select, .pdf-text {
  width: 100%; margin-top: 0.24rem; border-radius: 7px; border: 1px solid var(--pdf-border-strong);
  background: rgba(0, 0, 0, 0.25); color: #fff; padding: 0.38rem 0.45rem; font-size: 0.78rem;
}
.prop-grid input[type="color"] { padding: 0.08rem; min-height: 32px; }
.prop-grid input:disabled { opacity: 0.45; }
.pdf-check { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--pdf-text-dim); font-size: 0.76rem; cursor: pointer; }

.stamp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem; }
.stamp-chip {
  border: 1px solid var(--pdf-border-strong); border-radius: 7px; background: var(--pdf-surface-2);
  color: var(--pdf-text); font-size: 0.7rem; font-weight: 700; letter-spacing: 0.05em;
  padding: 0.38rem 0.3rem; cursor: pointer; transition: 0.16s;
}
.stamp-chip:hover { border-color: var(--pdf-accent-line); color: #fff; }
.stamp-chip.active { background: var(--pdf-accent-soft); border-color: var(--pdf-accent-line); color: var(--pdf-accent-2); }

.pdf-list { margin-top: 0.7rem; max-height: 230px; overflow: auto; }
.pdf-list-item {
  display: flex; justify-content: space-between; align-items: center; gap: 0.4rem;
  font-size: 0.76rem; color: var(--pdf-text); padding: 0.32rem 0; border-bottom: 1px solid var(--pdf-border);
}
.pdf-list-item:last-child { border-bottom: 0; }
.pdf-list-item button {
  border: 1px solid var(--pdf-border-strong); border-radius: 6px; background: var(--pdf-surface-2);
  color: #fff; font-size: 0.7rem; padding: 0.22rem 0.45rem; cursor: pointer;
}
.pdf-list-item button:hover { border-color: var(--pdf-accent-line); }
.pdf-list-item .sig-thumb { width: 56px; height: 24px; object-fit: contain; background: #fff; border-radius: 4px; }

.pdf-mini-btn {
  display: inline-flex; align-items: center; justify-content: center; width: 100%;
  border: 1px dashed var(--pdf-border-strong); border-radius: 8px; background: var(--pdf-surface);
  color: var(--pdf-text-dim); font-size: 0.76rem; padding: 0.45rem; transition: 0.16s;
}
.pdf-mini-btn:hover { border-color: var(--pdf-accent-line); color: #fff; }

.is-locked { position: relative; }
.lock-note { color: var(--pdf-text-dim); font-size: 0.74rem; margin: 0.5rem 0 0; }

/* ---------- Signature modal ---------- */
.sig-pad-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(8px); z-index: 10000; align-items: center; justify-content: center; padding: 1rem;
}
.sig-pad-overlay.show { display: flex; }
.sig-pad-box {
  width: min(600px, 94vw); border: 1px solid var(--pdf-border-strong); border-radius: 16px;
  background: linear-gradient(160deg, rgba(20, 28, 45, 0.99), rgba(10, 16, 28, 0.99));
  padding: 1.1rem; box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5);
}
.sig-modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.7rem; }
.sig-modal-head h3 { margin: 0; color: #fff; }
.sig-modal-close { background: transparent; border: 0; color: var(--pdf-text-dim); font-size: 1.4rem; cursor: pointer; line-height: 1; }
.sig-modal-close:hover { color: #fff; }
.sig-tabs { display: flex; gap: 0.4rem; margin-bottom: 0.8rem; }
.sig-tab {
  flex: 1; border: 1px solid var(--pdf-border-strong); background: var(--pdf-surface-2);
  color: var(--pdf-text-dim); border-radius: 9px; padding: 0.5rem; font-size: 0.82rem; cursor: pointer; transition: 0.16s;
}
.sig-tab:hover { color: #fff; }
.sig-tab.active { background: var(--pdf-accent-soft); border-color: var(--pdf-accent-line); color: var(--pdf-accent-2); font-weight: 700; }
.sig-panel { display: none; }
.sig-panel.active { display: block; }
#sigCanvas, #sigTypePreview, #sigUploadPreview {
  width: 100%; height: 200px; border-radius: 10px; background: #fff;
  border: 1px solid var(--pdf-border-strong); touch-action: none;
}
#sigTypePreview { height: 140px; }
#sigUploadPreview { height: 160px; }
.sig-font-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.45rem; margin: 0.6rem 0; }
.sig-font-chip {
  border: 1px solid var(--pdf-border-strong); background: #fff; color: #111;
  border-radius: 8px; padding: 0.45rem; font-size: 1.1rem; cursor: pointer; transition: 0.16s;
}
.sig-font-chip.active { outline: 2px solid var(--pdf-accent); }
.sig-upload-drop {
  display: grid; place-items: center; min-height: 90px; border: 2px dashed var(--pdf-border-strong);
  border-radius: 10px; color: var(--pdf-text-dim); font-size: 0.84rem; cursor: pointer; margin-bottom: 0.6rem; text-align: center; padding: 0.8rem;
}
.sig-upload-drop:hover { border-color: var(--pdf-accent-line); color: #fff; }
.sig-modal-actions { justify-content: flex-end; }

.sig-actions { margin-top: 0.7rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.sig-btn { border: 0; border-radius: 9px; padding: 0.5rem 0.9rem; cursor: pointer; font-size: 0.8rem; font-weight: 700; transition: 0.16s; }
.sig-btn-primary { background: linear-gradient(135deg, var(--pdf-accent), var(--pdf-accent-2)); color: #1a0f00; }
.sig-btn-primary:hover { filter: brightness(1.05); transform: translateY(-1px); }
.sig-btn-secondary { background: var(--pdf-surface-2); color: var(--pdf-text); border: 1px solid var(--pdf-border-strong); }
.sig-btn-secondary:hover { border-color: var(--pdf-accent-line); color: #fff; }

/* ---------- Shortcuts overlay ---------- */
.pdf-shortcuts-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0, 0, 0, 0.75);
  z-index: 10020; align-items: center; justify-content: center; padding: 1rem;
}
.pdf-shortcuts-overlay.open { display: flex; }
.pdf-shortcuts-card {
  width: min(620px, 95vw); background: rgba(15, 23, 42, 0.98);
  border: 1px solid var(--pdf-border-strong); border-radius: 14px; padding: 1.1rem;
}
.pdf-shortcuts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.55rem; font-size: 0.82rem; color: var(--pdf-text); }
.pdf-shortcuts-grid kbd {
  font-size: 0.74rem; background: rgba(255, 255, 255, 0.1); padding: 0.1rem 0.4rem;
  border-radius: 6px; border: 1px solid var(--pdf-border-strong);
}

/* ---------- Toasts ---------- */
.pdf-toast-host {
  position: fixed; right: 18px; bottom: 90px; z-index: 10030;
  display: flex; flex-direction: column; gap: 0.5rem; pointer-events: none;
}
.pdf-toast {
  min-width: 220px; max-width: 340px; pointer-events: auto;
  border-radius: 10px; padding: 0.7rem 0.9rem; font-size: 0.82rem; color: #fff;
  border: 1px solid var(--pdf-border-strong); background: rgba(15, 23, 42, 0.97);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  display: flex; align-items: center; gap: 0.55rem;
  transform: translateX(120%); opacity: 0; transition: transform 0.32s cubic-bezier(0.22,1,0.36,1), opacity 0.32s;
}
.pdf-toast.show { transform: translateX(0); opacity: 1; }
.pdf-toast::before { content: ''; width: 8px; height: 8px; border-radius: 50%; flex: none; }
.pdf-toast.success::before { background: #22c55e; box-shadow: 0 0 8px #22c55e; }
.pdf-toast.error::before { background: #ef4444; box-shadow: 0 0 8px #ef4444; }
.pdf-toast.info::before { background: var(--pdf-accent-2); box-shadow: 0 0 8px var(--pdf-accent-2); }

/* ---------- Upsell ---------- */
.pdf-upsell {
  background: linear-gradient(135deg, rgba(255,138,0,.1), rgba(255,167,38,.1));
  border: 1px solid rgba(255,138,0,.2); border-radius: 12px; padding: 1rem 1.5rem;
  margin-top: 1.5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.pdf-upsell p { margin: 0; font-size: 0.85rem; color: var(--pdf-text-dim); }
.pdf-upsell a {
  padding: 0.5rem 1.25rem; background: linear-gradient(135deg, var(--pdf-accent), var(--pdf-accent-2));
  color: #1a0f00; font-weight: 700; font-size: 0.85rem; border-radius: 8px; text-decoration: none;
}

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .pdf-workspace.is-ready { grid-template-columns: 156px minmax(0, 1fr) 250px; }
}
@media (max-width: 900px) {
  .pdf-workspace.is-ready,
  .pdf-workspace.rail-collapsed.is-ready { grid-template-columns: 1fr; }
  .pdf-rail { position: static; max-height: none; }
  .pdf-rail-body { flex-direction: row; overflow-x: auto; }
  .thumb-item { flex: 0 0 110px; }
  .pdf-side { position: static; max-height: none; order: 3; }
  .pdf-canvas-wrap { max-height: 64vh; }
  .pdf-toast-host { right: 10px; left: 10px; bottom: 80px; }
  .pdf-toast { max-width: none; }
}