:root {
  --bg: #f4f4f8;
  --surface: #ffffff;
  --panel: #f8f8ff;
  --border: #e5e5ea;
  --border-hover: #c5c0f0;
  --accent: #1b2fe7;
  --accent-light: #e8eafc;
  --accent-mid: #3a4dfc;
  --accent-dashed: #a3abf4;
  --text: #1a1a1a;
  --text-sec: #888;
  --text-dim: #bbb;
  --danger: #e24b4a;
  --success: #2d7a27;
  --success-bg: #eff8ee;
  --font: "DM Sans", -apple-system, sans-serif;
  --radius: 10px;
  --toolbar-h: 56px;
}

.pdf-editor-container {
  position: relative;
  height: 80vh;
  min-height: 700px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  border-radius: 12px;
  margin-bottom: 40px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.pdf-editor-container *,
.pdf-editor-container *::before,
.pdf-editor-container *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Toolbar ── */
#toolbar {
  height: var(--toolbar-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 16px;
  flex-shrink: 0;
  z-index: 10;
}
.brand {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  margin-right: 10px;
}
.tsep {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin: 0 6px;
  flex-shrink: 0;
}

.tbtn {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 12px;
  border: none;
  background: transparent;
  color: var(--text-sec);
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 400;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.tbtn:hover {
  background: var(--accent-light);
  color: var(--accent);
}
.tbtn.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 500;
}
.tbtn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.tbtn svg {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.open-btn {
  background: var(--accent);
  color: #fff;
  font-weight: 500;
  border: none;
  height: 34px;
  padding: 0 16px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  transition: opacity 0.15s, transform 0.1s;
}
.open-btn:hover {
  opacity: 0.88;
}
.open-btn:active {
  transform: scale(0.97);
}
.open-btn svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.finish-btn {
  background: var(--accent);
  color: #fff;
  font-weight: 500;
  border: none;
  height: 34px;
  padding: 0 16px;
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  transition: opacity 0.15s;
}
.finish-btn:hover {
  opacity: 0.88;
}
.finish-btn svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ── Main ── */
#main {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* ── Left panel – tools ── */
#toolPanel {
  width: 200px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  padding: 12px 10px;
  gap: 4px;
}
.tool-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-sec);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 8px 8px 4px;
}
.tool-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-sec);
  transition: background 0.12s, color 0.12s;
  border: none;
  background: none;
  font-family: var(--font);
  width: 100%;
  text-align: left;
}
.tool-item:hover {
  background: var(--accent-light);
  color: var(--accent);
}
.tool-item.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 500;
}
.tool-item svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}
.tool-divider {
  height: 1px;
  background: var(--border);
  margin: 6px 8px;
}

/* ── Viewer ── */
#viewer {
  flex: 1;
  overflow: auto;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 0 60px;
  gap: 20px;
  position: relative;
}
#viewer::-webkit-scrollbar {
  width: 8px;
}
#viewer::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.page-wrap {
  position: relative;
  flex-shrink: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 4px 24px rgba(83, 74, 183, 0.1);
  user-select: none;
}
.page-wrap canvas {
  display: block;
}
.annotation-layer {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  pointer-events: none;
}
.annotation-layer .placed-el,
.annotation-layer .placed-text {
  pointer-events: auto;
}

/* ── Placement mode ── */
#viewer.placing {
  cursor: crosshair;
}
#viewer.placing .page-wrap {
  outline: 2px dashed var(--accent-dashed);
  outline-offset: 3px;
}
#viewer.placing .page-wrap:hover {
  outline-color: var(--accent);
}

#placementPreview {
  position: absolute;
  pointer-events: none;
  z-index: 500;
  opacity: 0.6;
  transform: translate(-10px, -10px);
  border: 2px dashed var(--accent);
  border-radius: 4px;
  background: var(--accent-light);
  padding: 4px 8px;
  display: none;
  white-space: nowrap;
  max-width: 220px;
}
#placementPreview img {
  display: block;
  max-width: 200px;
  max-height: 70px;
  object-fit: contain;
}
#placementPreview .preview-label {
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
  padding: 2px 0;
}

#placementBanner {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  padding: 11px 20px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  z-index: 500;
  display: none;
  align-items: center;
  gap: 14px;
  box-shadow: 0 4px 20px rgba(83, 74, 183, 0.35);
  white-space: nowrap;
}
#placementBanner button {
  background: rgba(255, 255, 255, 0.22);
  border: none;
  color: #fff;
  border-radius: 100px;
  padding: 4px 14px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font);
  transition: background 0.15s;
}
#placementBanner button:hover {
  background: rgba(255, 255, 255, 0.4);
}

/* ── Placed element ── */
.placed-el {
  position: absolute;
  cursor: move;
  border: 2px solid transparent;
  border-radius: 4px;
  transition: border-color 0.1s;
  user-select: none;
}
.placed-el:hover {
  border-color: var(--accent-mid);
}
.placed-el.selected {
  border-color: var(--accent);
}
.placed-el img {
  display: block;
  max-width: 100%;
  pointer-events: none;
}
.placed-el .del-handle {
  position: absolute;
  top: -10px;
  right: -10px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--danger);
  color: #fff;
  font-size: 11px;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  border: 2px solid #fff;
  font-weight: 700;
  line-height: 1;
}
.placed-el.selected .del-handle {
  display: flex;
}
.placed-el .resize-handle {
  position: absolute;
  bottom: -6px;
  right: -6px;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: var(--accent);
  cursor: se-resize;
  display: none;
}
.placed-el.selected .resize-handle {
  display: block;
}

.placed-text {
  position: absolute;
  cursor: move;
  border: 2px solid transparent;
  border-radius: 4px;
  transition: border-color 0.1s;
  user-select: none;
  font-family: var(--font);
  font-size: 16px;
  color: #1a1a1a;
  white-space: nowrap;
  padding: 2px 4px;
  min-width: 40px;
  min-height: 24px;
}
.placed-text:hover {
  border-color: var(--accent-mid);
}
.placed-text.selected {
  border-color: var(--accent);
}
.placed-text .del-handle {
  position: absolute;
  top: -10px;
  right: -10px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--danger);
  color: #fff;
  font-size: 11px;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  border: 2px solid #fff;
  font-weight: 700;
  line-height: 1;
}
.placed-text.selected .del-handle {
  display: flex;
}

/* ── Modal ── */
.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.esign-modal {
  background: var(--surface);
  border-radius: 16px;
  width: 540px;
  max-width: 95vw;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(83, 74, 183, 0.18);
  transform: scale(0.96);
  transition: transform 0.2s;
}
.modal-overlay.open .esign-modal {
  transform: scale(1);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 0;
  flex-shrink: 0;
}
.modal-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}
.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-sec);
  font-size: 20px;
  line-height: 1;
  padding: 4px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.modal-close:hover {
  background: var(--accent-light);
  color: var(--accent);
}

.modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  margin-top: 16px;
  flex-shrink: 0;
}
.mtab {
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-sec);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
}
.mtab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

/* Draw tab */
#drawCanvas {
  width: 100%;
  height: 180px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  cursor: crosshair;
  display: block;
  background: #fff;
  touch-action: none;
}
.canvas-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  align-items: center;
}
.clr-btn {
  padding: 7px 14px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font);
  font-size: 13px;
  color: var(--text-sec);
  cursor: pointer;
  transition: background 0.15s;
}
.clr-btn:hover {
  background: var(--panel);
}
.pen-size-label {
  font-size: 12px;
  color: var(--text-sec);
  margin-left: auto;
}
input[type="range"] {
  accent-color: var(--accent);
}

/* Type tab */
.type-input {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: var(--font);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
  margin-bottom: 14px;
}
.type-input:focus {
  border-color: var(--accent);
}
.font-picker {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.font-opt {
  padding: 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  font-size: 18px;
  color: var(--text);
  background: var(--panel);
}
.font-opt.selected {
  border-color: var(--accent);
  background: var(--accent-light);
}
.type-preview {
  width: 100%;
  height: 80px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #1a1a1a;
  overflow: hidden;
  padding: 8px;
}

/* Upload tab */
.upload-sig-area {
  border: 2px dashed var(--accent-dashed);
  border-radius: var(--radius);
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  background: var(--panel);
  transition: background 0.2s, border-color 0.2s;
  margin-bottom: 14px;
}
.upload-sig-area:hover {
  border-color: var(--accent);
  background: var(--accent-light);
}
.upload-sig-text {
  font-size: 14px;
  color: var(--text-sec);
}
#sigPreviewImg {
  width: 100%;
  max-height: 100px;
  object-fit: contain;
  display: none;
  border-radius: 8px;
  margin-top: 8px;
}

/* Color picker */
.color-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
}
.color-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.1s;
  flex-shrink: 0;
}
.color-dot.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-light);
}

/* Modal footer */
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.btn-cancel {
  padding: 9px 18px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font);
  font-size: 13px;
  color: var(--text-sec);
  cursor: pointer;
  transition: background 0.15s;
}
.btn-cancel:hover {
  background: var(--panel);
}
.btn-apply {
  padding: 9px 20px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn-apply:hover {
  opacity: 0.88;
}

/* Text modal */
#textModal .type-input {
  margin-bottom: 0;
}

.placed-date {
  font-size: 14px;
  color: #1a1a1a;
}

/* ── Toast ── */
#toast {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 10px 20px;
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-sec);
  box-shadow: 0 4px 16px rgba(83, 74, 183, 0.1);
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 300;
  white-space: nowrap;
}
#toast.show {
  opacity: 1;
}

/* ── Loading bar ── */
#loadingBar {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  width: 0%;
  z-index: 400;
  transition: width 0.3s ease;
  opacity: 0;
  border-radius: 0 2px 2px 0;
}

/* Page number badge */
.page-badge {
  text-align: center;
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 6px;
  pointer-events: none;
}

.pdf-editor-container * {
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}