@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css');

.vtp-tool-section {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  overflow-x: hidden;
  color: #171923;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #fbfcff 0%, #f6f7fb 100%);
}

.vtp-tool-section,
.vtp-tool-section * {
  box-sizing: border-box;
}

.vtp-tool-section .vtp-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.vtp-tool-section .vtp-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.vtp-tool-section .vtp-header h2 {
  margin: 0;
  color: #111827;
  font-weight: 780;
  line-height: 1.08;
  letter-spacing: 0;
}

.vtp-tool-section .vtp-header p {
  margin: 14px auto 0;
  color: #5f6675;
  line-height: 1.65;
}

.vtp-tool-section .vtp-shell {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid #e3e7f0;
  box-shadow: 0 24px 70px rgba(23, 31, 56, 0.09);
  overflow: hidden;
}

.vtp-tool-section .vtp-layout {
  display: grid;
  gap: 18px;
}

.vtp-tool-section .vtp-left-column,
.vtp-tool-section .vtp-right-column {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.vtp-tool-section .vtp-upload-panel,
.vtp-tool-section .vtp-control-card,
.vtp-tool-section .vtp-preview-panel {
  border: 1px solid #e6e9f1;
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 10px 28px rgba(28, 37, 65, 0.05);
  min-width: 0;
}

.vtp-tool-section .vtp-drop-zone {
  position: relative;
  display: grid;
  align-items: center;
  justify-items: center;
  gap: 12px;
  text-align: center;
  border: 1.5px dashed #b8c1d6;
  border-radius: 14px;
  background:
    linear-gradient(135deg, rgba(75, 111, 255, 0.08), rgba(128, 86, 214, 0.08)),
    #fbfcff;
  color: #1f2937;
  cursor: pointer;
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.vtp-tool-section .vtp-drop-zone:hover,
.vtp-tool-section .vtp-drop-zone:focus,
.vtp-tool-section .vtp-drop-zone.vtp-is-dragover {
  border-color: #5867dd;
  box-shadow: 0 12px 30px rgba(88, 103, 221, 0.13);
  outline: none;
}

.vtp-tool-section .vtp-drop-zone strong {
  display: block;
  font-size: 16px;
  color: #111827;
}

.vtp-tool-section .vtp-drop-zone span {
  display: block;
  margin-top: 5px;
  color: #687083;
  font-size: 13px;
  line-height: 1.45;
}

.vtp-tool-section .vtp-file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.vtp-tool-section .vtp-upload-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, #5168f6, #8758d6);
  position: relative;
  box-shadow: 0 12px 22px rgba(91, 92, 220, 0.24);
}

.vtp-tool-section .vtp-upload-icon::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 14px;
  width: 18px;
  height: 20px;
  border: 2px solid #ffffff;
  border-radius: 4px;
}

.vtp-tool-section .vtp-upload-icon::after {
  content: "";
  position: absolute;
  left: 20px;
  top: 21px;
  width: 8px;
  height: 8px;
  border-left: 2px solid #ffffff;
  border-top: 2px solid #ffffff;
  transform: rotate(45deg);
}

.vtp-tool-section .vtp-file-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: #5f6675;
  font-size: 13px;
  line-height: 1.4;
  padding-top: 12px;
}

.vtp-tool-section .vtp-meta-name {
  color: #242b3a;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.vtp-tool-section .vtp-video-preview {
  display: none;
  width: 100%;
  margin-top: 14px;
  border-radius: 14px;
  background: #0d1117;
  border: 1px solid #dfe4ef;
  max-height: 300px;
}

.vtp-tool-section .vtp-video-preview.vtp-has-video {
  display: block;
}

.vtp-tool-section .vtp-control-card h3,
.vtp-tool-section .vtp-preview-panel h3 {
  margin: 0;
  color: #151a27;
  font-size: 16px;
  line-height: 1.3;
}

.vtp-tool-section .vtp-control-grid {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.vtp-tool-section .vtp-field {
  display: grid;
  gap: 7px;
  min-width: 0;
}

.vtp-tool-section .vtp-field span,
.vtp-tool-section .vtp-checkbox-row span {
  color: #3b4353;
  font-size: 13px;
  font-weight: 700;
}

.vtp-tool-section .vtp-field select,
.vtp-tool-section .vtp-field input {
  width: 100%;
  min-width: 0;
  border: 1px solid #ccd3e1;
  border-radius: 10px;
  padding: 11px 12px;
  background: #ffffff;
  color: #171923;
  font-size: 14px;
  line-height: 1.2;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.vtp-tool-section .vtp-field select:focus,
.vtp-tool-section .vtp-field input:focus {
  border-color: #5969e8;
  box-shadow: 0 0 0 3px rgba(89, 105, 232, 0.16);
}

.vtp-tool-section .vtp-checkbox-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 14px;
}

.vtp-tool-section .vtp-checkbox-row input {
  width: 18px;
  height: 18px;
  accent-color: #5969e8;
}

.vtp-tool-section .vtp-button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.vtp-tool-section .vtp-action-button {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14px;
  font-weight: 760;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease, background 160ms ease;
  text-align: center;
}

.vtp-tool-section .vtp-action-button:hover {
  transform: translateY(-1px);
}

.vtp-tool-section .vtp-action-button:focus {
  outline: 3px solid rgba(89, 105, 232, 0.22);
  outline-offset: 2px;
}

.vtp-tool-section .vtp-primary-button {
  color: #ffffff;
  background: linear-gradient(135deg, #4f63ef, #7952d5);
  box-shadow: 0 10px 20px rgba(82, 95, 224, 0.18);
}

.vtp-tool-section .vtp-secondary-button {
  color: #25305c;
  background: #f4f6ff;
  border-color: #dbe1ff;
}

.vtp-tool-section .vtp-ghost-button {
  color: #424a5c;
  background: #ffffff;
  border-color: #d6dce8;
}

.vtp-tool-section .vtp-dark-button {
  color: #ffffff;
  background: #171923;
}

.vtp-tool-section .vtp-panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.vtp-tool-section .vtp-frame-count,
.vtp-tool-section .vtp-page-count {
  color: #5f6675;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

.vtp-tool-section .vtp-frame-grid {
  display: grid;
  gap: 10px;
  min-height: 120px;
}

.vtp-tool-section .vtp-empty-state {
  display: grid;
  place-items: center;
  min-height: 120px;
  padding: 18px;
  border: 1px dashed #d1d7e5;
  border-radius: 14px;
  background: #fafbfe;
  color: #687083;
  text-align: center;
  line-height: 1.5;
}

.vtp-tool-section .vtp-frame-item {
  border: 1px solid #e0e5ef;
  border-radius: 12px;
  background: #ffffff;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.vtp-tool-section .vtp-frame-item:hover,
.vtp-tool-section .vtp-frame-item.vtp-selected {
  border-color: #5969e8;
  box-shadow: 0 10px 24px rgba(70, 86, 180, 0.12);
}

.vtp-tool-section .vtp-frame-item.vtp-selected {
  outline: 2px solid rgba(89, 105, 232, 0.18);
}

.vtp-tool-section .vtp-frame-item img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: #111827;
}

.vtp-tool-section .vtp-frame-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px;
  color: #3d4658;
  font-size: 12px;
}

.vtp-tool-section .vtp-remove-frame {
  border: 0;
  border-radius: 8px;
  background: #f0f2f7;
  color: #2f3646;
  min-width: 28px;
  min-height: 28px;
  cursor: pointer;
  font-weight: 800;
}

.vtp-tool-section .vtp-pdf-preview {
  display: grid;
  gap: 14px;
  max-height: 520px;
  overflow: auto;
  padding: 12px;
  border: 1px solid #e2e6ef;
  border-radius: 14px;
  background: #f4f6fa;
}

.vtp-tool-section .vtp-pdf-page {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: center;
  justify-items: center;
  margin: 0 auto;
  border: 1px solid #d8deea;
  box-shadow: 0 12px 28px rgba(17, 24, 39, 0.12);
  overflow: hidden;
  padding: 18px;
}

.vtp-tool-section .vtp-pdf-page.vtp-bg-white {
  background: #ffffff;
  color: #111827;
}

.vtp-tool-section .vtp-pdf-page.vtp-bg-gray {
  background: #eef1f6;
  color: #111827;
}

.vtp-tool-section .vtp-pdf-page.vtp-bg-black {
  background: #111318;
  color: #f9fafb;
}

.vtp-tool-section .vtp-pdf-page.vtp-portrait {
  width: min(100%, 260px);
  aspect-ratio: 1 / 1.414;
}

.vtp-tool-section .vtp-pdf-page.vtp-landscape {
  width: min(100%, 360px);
  aspect-ratio: 1.414 / 1;
}

.vtp-tool-section .vtp-pdf-page img {
  width: 100%;
  height: 100%;
  min-height: 0;
  object-position: center;
  border-radius: 8px;
}

.vtp-tool-section .vtp-pdf-page.vtp-fit-contain img {
  object-fit: contain;
}

.vtp-tool-section .vtp-pdf-page.vtp-fit-cover img {
  object-fit: cover;
}

.vtp-tool-section .vtp-page-label {
  position: absolute;
  left: 14px;
  bottom: 12px;
  padding: 5px 8px;
  border-radius: 8px;
  background: rgba(17, 24, 39, 0.72);
  color: #ffffff;
  font-size: 11px;
  font-weight: 700;
}

.vtp-tool-section .vtp-bg-black .vtp-page-label {
  background: rgba(255, 255, 255, 0.16);
}

.vtp-tool-section .vtp-summary {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  padding: 14px;
  border-radius: 14px;
  background: #f8f9fd;
  border: 1px solid #e5e9f2;
  color: #4d5668;
  font-size: 13px;
  line-height: 1.4;
}

.vtp-tool-section .vtp-summary strong {
  color: #252c3b;
}

.vtp-tool-section .vtp-status {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  background: #f1f5ff;
  border: 1px solid #dbe5ff;
  color: #25376d;
  font-size: 13px;
  font-weight: 700;
}

@media (prefers-reduced-motion: reduce) {
  .vtp-tool-section .vtp-action-button,
  .vtp-tool-section .vtp-drop-zone,
  .vtp-tool-section .vtp-frame-item {
    transition: none;
  }

  .vtp-tool-section .vtp-action-button:hover {
    transform: none;
  }
}

@media (min-width: 320px) and (max-width: 374px) {
  .vtp-tool-section { padding: 30px 10px; }
  .vtp-tool-section .vtp-inner { padding: 0; }
  .vtp-tool-section .vtp-header h2 { font-size: 25px; }
  .vtp-tool-section .vtp-header p { font-size: 14px; }
  .vtp-tool-section .vtp-shell { margin-top: 22px; padding: 10px; border-radius: 14px; }
  .vtp-tool-section .vtp-layout { grid-template-columns: 1fr; gap: 12px; }
  .vtp-tool-section .vtp-upload-panel,
  .vtp-tool-section .vtp-control-card,
  .vtp-tool-section .vtp-preview-panel { padding: 12px; border-radius: 12px; }
  .vtp-tool-section .vtp-drop-zone { padding: 18px 10px; }
  .vtp-tool-section .vtp-control-grid { grid-template-columns: 1fr; gap: 10px; }
  .vtp-tool-section .vtp-action-button { width: 100%; padding: 12px 10px; font-size: 13px; }
  .vtp-tool-section .vtp-frame-grid { grid-template-columns: 1fr; }
  .vtp-tool-section .vtp-pdf-preview { max-height: 410px; padding: 8px; }
  .vtp-tool-section .vtp-pdf-page.vtp-portrait { width: min(100%, 210px); }
  .vtp-tool-section .vtp-pdf-page.vtp-landscape { width: min(100%, 260px); }
}

@media (min-width: 375px) and (max-width: 429px) {
  .vtp-tool-section { padding: 34px 12px; }
  .vtp-tool-section .vtp-inner { padding: 0; }
  .vtp-tool-section .vtp-header h2 { font-size: 28px; }
  .vtp-tool-section .vtp-header p { font-size: 14.5px; }
  .vtp-tool-section .vtp-shell { margin-top: 24px; padding: 12px; border-radius: 16px; }
  .vtp-tool-section .vtp-layout { grid-template-columns: 1fr; gap: 14px; }
  .vtp-tool-section .vtp-upload-panel,
  .vtp-tool-section .vtp-control-card,
  .vtp-tool-section .vtp-preview-panel { padding: 14px; border-radius: 13px; }
  .vtp-tool-section .vtp-drop-zone { padding: 20px 12px; }
  .vtp-tool-section .vtp-control-grid { grid-template-columns: 1fr; gap: 11px; }
  .vtp-tool-section .vtp-action-button { width: 100%; padding: 12px; font-size: 14px; }
  .vtp-tool-section .vtp-frame-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .vtp-tool-section .vtp-pdf-preview { max-height: 430px; padding: 9px; }
  .vtp-tool-section .vtp-pdf-page.vtp-portrait { width: min(100%, 225px); }
  .vtp-tool-section .vtp-pdf-page.vtp-landscape { width: min(100%, 300px); }
}

@media (min-width: 430px) and (max-width: 767px) {
  .vtp-tool-section { padding: 40px 16px; }
  .vtp-tool-section .vtp-inner { padding: 0; }
  .vtp-tool-section .vtp-header h2 { font-size: 32px; }
  .vtp-tool-section .vtp-header p { font-size: 15px; }
  .vtp-tool-section .vtp-shell { margin-top: 26px; padding: 14px; border-radius: 18px; }
  .vtp-tool-section .vtp-layout { grid-template-columns: 1fr; gap: 15px; }
  .vtp-tool-section .vtp-upload-panel,
  .vtp-tool-section .vtp-control-card,
  .vtp-tool-section .vtp-preview-panel { padding: 16px; border-radius: 14px; }
  .vtp-tool-section .vtp-drop-zone { padding: 24px 14px; }
  .vtp-tool-section .vtp-control-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .vtp-tool-section .vtp-action-button { flex: 1 1 160px; padding: 12px 13px; }
  .vtp-tool-section .vtp-frame-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .vtp-tool-section .vtp-pdf-preview { max-height: 460px; padding: 10px; }
  .vtp-tool-section .vtp-pdf-page.vtp-portrait { width: min(100%, 245px); }
  .vtp-tool-section .vtp-pdf-page.vtp-landscape { width: min(100%, 350px); }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .vtp-tool-section { padding: 56px 24px; }
  .vtp-tool-section .vtp-inner { padding: 0; }
  .vtp-tool-section .vtp-header h2 { font-size: 40px; }
  .vtp-tool-section .vtp-header p { font-size: 16px; }
  .vtp-tool-section .vtp-shell { margin-top: 32px; padding: 18px; border-radius: 22px; }
  .vtp-tool-section .vtp-layout { grid-template-columns: 1fr; gap: 18px; }
  .vtp-tool-section .vtp-upload-panel,
  .vtp-tool-section .vtp-control-card,
  .vtp-tool-section .vtp-preview-panel { padding: 18px; border-radius: 16px; }
  .vtp-tool-section .vtp-drop-zone { padding: 28px 18px; }
  .vtp-tool-section .vtp-control-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
  .vtp-tool-section .vtp-action-button { flex: 1 1 180px; padding: 12px 14px; }
  .vtp-tool-section .vtp-frame-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .vtp-tool-section .vtp-pdf-preview { max-height: 500px; padding: 12px; }
  .vtp-tool-section .vtp-pdf-page.vtp-portrait { width: min(100%, 260px); }
  .vtp-tool-section .vtp-pdf-page.vtp-landscape { width: min(100%, 380px); }
}

@media (min-width: 1024px) {
  .vtp-tool-section { padding: 70px 28px; }
  .vtp-tool-section .vtp-inner { padding: 0; }
  .vtp-tool-section .vtp-header h2 { font-size: 46px; }
  .vtp-tool-section .vtp-header p { font-size: 17px; }
  .vtp-tool-section .vtp-shell { margin-top: 36px; padding: 22px; border-radius: 24px; }
  .vtp-tool-section .vtp-layout { grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); gap: 20px; }
  .vtp-tool-section .vtp-upload-panel,
  .vtp-tool-section .vtp-control-card,
  .vtp-tool-section .vtp-preview-panel { padding: 20px; border-radius: 16px; }
  .vtp-tool-section .vtp-drop-zone { padding: 30px 20px; }
  .vtp-tool-section .vtp-control-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; }
  .vtp-tool-section .vtp-action-button { flex: 1 1 auto; padding: 12px 15px; }
  .vtp-tool-section .vtp-frame-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .vtp-tool-section .vtp-pdf-preview { max-height: 530px; padding: 12px; }
  .vtp-tool-section .vtp-pdf-page.vtp-portrait { width: min(100%, 270px); }
  .vtp-tool-section .vtp-pdf-page.vtp-landscape { width: min(100%, 400px); }
}

@media print {
  body * {
    visibility: hidden;
  }

  .vtp-tool-section,
  .vtp-tool-section .vtp-pdf-preview,
  .vtp-tool-section .vtp-pdf-preview * {
    visibility: visible;
  }

  .vtp-tool-section {
    position: static;
    padding: 0;
    background: #ffffff;
    overflow: visible;
  }

  .vtp-tool-section .vtp-header,
  .vtp-tool-section .vtp-left-column,
  .vtp-tool-section .vtp-panel-heading,
  .vtp-tool-section .vtp-summary,
  .vtp-tool-section .vtp-button-row,
  .vtp-tool-section .vtp-status {
    display: none;
  }

  .vtp-tool-section .vtp-inner,
  .vtp-tool-section .vtp-shell,
  .vtp-tool-section .vtp-layout,
  .vtp-tool-section .vtp-right-column,
  .vtp-tool-section .vtp-preview-panel,
  .vtp-tool-section .vtp-pdf-preview {
    display: block;
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: #ffffff;
    overflow: visible;
  }

  .vtp-tool-section .vtp-preview-panel {
    visibility: visible;
  }

  .vtp-tool-section .vtp-pdf-page {
    page-break-after: always;
    break-after: page;
    width: 100%;
    height: 96vh;
    max-width: none;
    margin: 0 auto;
    box-shadow: none;
    border: 0;
  }

  .vtp-tool-section .vtp-pdf-page.vtp-landscape {
    height: 68vh;
  }
}