* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    Roboto, Helvetica, Arial, sans-serif;
  background: #f4f6fb;
  color: #1f2937;
  line-height: 1.6;
}

header {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #fff;
  padding: 28px 20px;
  text-align: center;
}

header h1 {
  margin: 0 0 6px;
  font-size: 24px;
}

.subtitle {
  margin: 0;
  opacity: 0.9;
  font-size: 14px;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

/* 首页左右两栏布局：左侧上传记录，右侧主流程，撑满整个视口 */
main.layout {
  max-width: none;
  width: 100%;
  min-height: calc(100vh - 96px);
  display: flex;
  align-items: stretch;
  gap: 20px;
  padding: 20px;
}

.side-panel {
  flex: 0 0 420px;
  position: sticky;
  top: 20px;
  align-self: flex-start;
  max-height: calc(100vh - 40px);
  overflow: auto;
}

.main-panel {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* 窄屏时改为上下堆叠 */
@media (max-width: 900px) {
  main.layout {
    flex-direction: column;
  }

  .side-panel {
    flex: 1 1 auto;
    width: 100%;
    position: static;
    max-height: none;
  }
}

/* 签字页使用更宽的布局，让文档预览更大 */
body.sign-page main {
  max-width: 1200px;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.card h2 {
  margin-top: 0;
  font-size: 18px;
}

.hidden {
  display: none !important;
}

.hint {
  color: #6b7280;
  font-size: 13px;
}

.status {
  font-size: 13px;
  color: #4f46e5;
}

/* Dropzone */
.dropzone {
  border: 2px dashed #c7d2fe;
  border-radius: 10px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  color: #6b7280;
  transition: all 0.2s;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: #4f46e5;
  background: #eef2ff;
  color: #4f46e5;
}

/* 下载密码输入 */
.pwd-field {
  margin-top: 16px;
}

.pwd-field label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #374151;
}

.pwd-field input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s;
}

.pwd-field input:focus {
  border-color: #4f46e5;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.toolbar span {
  font-size: 14px;
  color: #374151;
}

/* PDF container：连续滚动显示所有页面 */
.pdf-container {
  position: relative;
  overflow: auto;
  max-height: 75vh;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  background: #fafafa;
  text-align: center;
  padding: 12px 0;
}

/* 每一页的包裹层：canvas 与 overlay 叠放 */
.pdf-page-wrap {
  position: relative;
  margin: 0 auto 16px;
  border: 1px solid #ddd;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  background: #fff;
  max-width: 100%;
}

.pdf-page-canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

/* 签字页的文档预览：更大、更清晰 */
#preview .pdf-container {
  max-height: 85vh;
  padding: 12px;
}

.preview-page {
  display: block;
  margin: 0 auto 16px;
  border: 1px solid #ddd;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  background: #fff;
  max-width: 100%;
  height: auto;
}

/* 手机端：预览区去掉外边框与内边距，让 PDF 页面铺满 */
@media (max-width: 640px) {
  body.sign-page main {
    padding: 0;
  }

  #preview.card {
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
    margin-bottom: 0;
  }

  #preview h2 {
    display: none;
  }

  #preview .pdf-container {
    border: none;
    border-radius: 0;
    background: transparent;
    padding: 0;
    max-height: none;
    overflow: visible;
  }

  .preview-page {
    border: none;
    box-shadow: none;
    margin: 0 auto;
    width: 100%;
  }
}

.overlay {
  position: absolute;
  top: 0;
  left: 0;
  cursor: crosshair;
}

.field-box {
  position: absolute;
  border: 2px solid #4f46e5;
  background: rgba(79, 70, 229, 0.12);
  color: #4f46e5;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.field-box.temp {
  border-style: dashed;
  background: rgba(79, 70, 229, 0.08);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  background: #fff;
  color: #374151;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
}

.btn:hover {
  background: #f3f4f6;
}

.btn.primary {
  background: #4f46e5;
  border-color: #4f46e5;
  color: #fff;
}

.btn.primary:hover {
  background: #4338ca;
}

.btn.danger {
  color: #dc2626;
  border-color: #fca5a5;
}

.btn.danger:hover {
  background: #fef2f2;
}

.btn.small {
  padding: 5px 10px;
  font-size: 12px;
}

.actions {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Link box */
.link-box {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.link-box textarea {
  flex: 1;
  padding: 10px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 12px;
  font-family: monospace;
  resize: vertical;
  word-break: break-all;
}

/* 链接与二维码卡片左右排版：链接在左，卡片在右 */
.link-qr-row {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
}

.link-col {
  flex: 1 1 320px;
  min-width: 0;
}

.qr-col {
  flex: 0 0 360px;
}

@media (max-width: 900px) {
  .link-qr-row {
    flex-direction: column;
  }

  .qr-col {
    flex: 1 1 auto;
    width: 100%;
  }
}

/* QR code card（参考图片样式） */
.qr-card {
  margin: 0;
  max-width: 420px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 28px rgba(79, 70, 229, 0.18);
  background: #fff;
}

.qr-card-header {
  background: linear-gradient(135deg, #6d28d9, #7c3aed);
  color: #fff;
  text-align: center;
  padding: 32px 20px 28px;
}

.qr-card-header h3 {
  margin: 0 0 14px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 1px;
}

.qr-card-pill {
  display: inline-block;
  padding: 6px 22px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  color: #ede9fe;
  font-size: 13px;
  letter-spacing: 2px;
}

.qr-card-body {
  padding: 32px 20px;
  text-align: center;
}

.qr-card-body #qrcode {
  display: inline-block;
  padding: 12px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}

.qr-card-body #qrcode img,
.qr-card-body #qrcode canvas {
  display: block;
  width: 220px;
  height: 220px;
}

.qr-card-footer {
  margin: 0 20px 24px;
  padding: 16px;
  text-align: center;
  background: #f9fafb;
  border-radius: 10px;
  color: #6b7280;
  font-size: 14px;
}

/* Signature pads */
.sign-pad-wrap {
  margin-bottom: 20px;
}

.sign-pad-wrap label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #374151;
}

.sign-pad {
  width: 100%;
  max-width: 600px;
  height: 200px;
  border: 2px dashed #9ca3af;
  border-radius: 8px;
  background: #fff;
  touch-action: none;
  cursor: crosshair;
  display: block;
  margin-bottom: 8px;
}

/* Upload records table */
.records-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 13px;
}

.records-table th,
.records-table td {
  padding: 10px 8px;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
  vertical-align: middle;
}

.records-table th {
  background: #f9fafb;
  color: #374151;
  font-weight: 600;
  white-space: nowrap;
}

.records-table td:first-child {
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.records-ops {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* 左侧窄栏中的记录：改为卡片列表，避免表格横向溢出 */
.side-panel .records-table,
.side-panel .records-table thead {
  display: none;
}

.record-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}

.record-item {
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 12px;
  background: #fafbff;
}

.record-item .record-name {
  font-size: 13px;
  font-weight: 600;
  color: #1f2937;
  word-break: break-all;
  margin-bottom: 6px;
}

.record-item .record-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 12px;
  color: #6b7280;
  margin-bottom: 10px;
}

.record-item .record-ops {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  white-space: nowrap;
}

.badge-signed {
  background: #dcfce7;
  color: #166534;
}

.badge-pending {
  background: #fef3c7;
  color: #92400e;
}

/* ---------- 登录相关 ---------- */
header {
  position: relative;
}

.user-box {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}

.user-box #userName {
  opacity: 0.95;
}

.user-box .btn.small {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.user-box .btn.small:hover {
  background: rgba(255, 255, 255, 0.28);
}

.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: #fff;
  border-radius: 16px;
  padding: 32px 28px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

.login-card h2 {
  margin: 0 0 6px;
  font-size: 22px;
  text-align: center;
  color: #1f2937;
}

.login-card .hint {
  text-align: center;
  margin: 0 0 22px;
}

.login-field {
  margin-bottom: 16px;
}

.login-field label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #374151;
}

.login-field input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s;
}

.login-field input:focus {
  border-color: #4f46e5;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.login-error {
  color: #dc2626;
  font-size: 13px;
  min-height: 18px;
  margin: 0 0 12px;
  text-align: center;
}

.login-btn {
  width: 100%;
  padding: 12px;
  font-size: 15px;
}

@media (max-width: 640px) {
  .user-box {
    position: static;
    transform: none;
    justify-content: center;
    margin-top: 10px;
  }
}