* {
  box-sizing: border-box;
}

:root {
  --ibs-bg: #f4f6f9;
  --ibs-surface: #ffffff;
  --ibs-surface-2: #f8fafc;
  --ibs-border: #dce2ec;
  --ibs-border-strong: #c8d2e0;
  --ibs-text: #162040;
  --ibs-text-soft: #4a5568;
  --ibs-text-muted: #8a96a8;
  --ibs-blue: #3b6fd4;
  --ibs-blue-dark: #2d58b0;
  --ibs-blue-light: #eef3fc;
  --ibs-blue-faint: #f5f8ff;
  --ibs-red: #c94040;
  --ibs-shadow: 0 2px 12px rgba(22, 32, 64, 0.07), 0 1px 3px rgba(22, 32, 64, 0.05);
  --ibs-shadow-card: 0 4px 24px rgba(22, 32, 64, 0.09), 0 1px 4px rgba(22, 32, 64, 0.06);
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--ibs-bg);
  color: var(--ibs-text-soft);
}

.ibs-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.ibs-hero {
  margin-bottom: 20px;
}

.ibs-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--ibs-blue-light);
  color: var(--ibs-blue);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.ibs-hero h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(26px, 4vw, 34px);
  color: var(--ibs-text);
  font-weight: 700;
  letter-spacing: -0.4px;
  margin: 0 0 8px;
  line-height: 1.25;
}

.ibs-lead {
  color: var(--ibs-text-soft);
  font-size: 14px;
  max-width: 560px;
  line-height: 1.72;
  margin: 0;
}

.ibs-tool-card {
  background: var(--ibs-surface);
  border: 1px solid var(--ibs-border);
  border-radius: 10px;
  box-shadow: var(--ibs-shadow-card);
  padding: 28px 28px 24px;
  margin-bottom: 30px;
}

.ibs-tool-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ibs-border);
}

.ibs-tool-head h2 {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ibs-text);
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.ibs-tool-head p {
  margin: 0;
  color: var(--ibs-text-soft);
  font-size: 14px;
  line-height: 1.6;
}

.ibs-form {
  display: grid;
  gap: 18px;
}

.ibs-native-file-hidden {
  display: none !important;
}

.ibs-section-label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ibs-text);
  letter-spacing: 0.3px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.ibs-upload-area {
  border: 1px solid var(--ibs-border);
  border-radius: 8px;
  padding: 18px;
  background: var(--ibs-blue-faint);
}

.ibs-upload-label {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ibs-text);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.ibs-dropzone {
  border: 2px dashed var(--ibs-border-strong);
  background: var(--ibs-surface);
  border-radius: 8px;
  padding: 28px 18px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.ibs-dropzone:hover,
.ibs-dropzone.is-dragover {
  border-color: var(--ibs-blue);
  background: var(--ibs-blue-light);
  box-shadow: 0 4px 18px rgba(59, 111, 212, 0.12);
  transform: translateY(-1px);
}

.ibs-dropzone:focus {
  outline: none;
  border-color: var(--ibs-blue);
  box-shadow: 0 0 0 3px rgba(74, 127, 212, 0.12);
}

.ibs-dropzone-icon {
  font-size: 28px;
  line-height: 1;
  margin-bottom: 10px;
  color: var(--ibs-blue);
}

.ibs-dropzone-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ibs-text);
  margin-bottom: 4px;
}

.ibs-dropzone-text {
  font-size: 13px;
  color: var(--ibs-text-muted);
}

.ibs-setting input,
.ibs-setting select {
  display: block;
  width: 100%;
  border: 1px solid var(--ibs-border);
  background: var(--ibs-bg);
  color: var(--ibs-text);
  border-radius: 6px;
  padding: 11px 14px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.ibs-setting input:focus,
.ibs-setting select:focus {
  border-color: #4a7fd4;
  box-shadow: 0 0 0 3px rgba(74, 127, 212, 0.12);
  background: var(--ibs-surface);
}

.ibs-hint {
  margin: 10px 0 0;
  color: var(--ibs-text-muted);
  font-size: 13px;
  line-height: 1.6;
}

.ibs-preset-wrap,
.ibs-preview-wrap {
  margin-top: 4px;
}

.ibs-preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 12px;
}

.ibs-preset-btn {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  border: 1px solid var(--ibs-border);
  background: var(--ibs-surface);
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease, background 0.18s ease;
}

.ibs-preset-btn:hover {
  border-color: var(--ibs-blue);
  box-shadow: 0 4px 16px rgba(59, 111, 212, 0.12);
  transform: translateY(-1px);
}

.ibs-preset-btn.is-active {
  border-color: var(--ibs-blue);
  background: var(--ibs-blue-light);
  box-shadow: 0 4px 16px rgba(59, 111, 212, 0.14);
}

.ibs-preset-btn strong {
  color: var(--ibs-text);
  font-size: 13.5px;
  font-weight: 600;
}

.ibs-preset-btn span {
  color: var(--ibs-text-muted);
  font-size: 12.5px;
  line-height: 1.45;
}

.ibs-settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.ibs-setting label {
  display: block;
  margin-bottom: 6px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ibs-text);
  letter-spacing: 0.2px;
  text-transform: uppercase;
}

.ibs-checkbox-row {
  display: flex;
  align-items: center;
}

.ibs-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ibs-text-soft);
  font-size: 14px;
  cursor: pointer;
}

.ibs-checkbox-label input {
  width: 16px;
  height: 16px;
  accent-color: var(--ibs-blue);
}

.ibs-selection-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding: 12px 14px;
  border: 1px solid var(--ibs-border);
  background: var(--ibs-surface);
  border-radius: 8px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--ibs-text-soft);
}

.ibs-selection-summary strong {
  color: var(--ibs-text);
}

.ibs-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.ibs-preview-thumb-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 6px;
  overflow: hidden;
  background: var(--ibs-blue-faint);
  border: 1px solid var(--ibs-border);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ibs-preview-thumb {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  background: #fff;
}

.ibs-preview-fallback {
  font-size: 12px;
  color: var(--ibs-text-muted);
  padding: 12px;
  text-align: center;
}

.ibs-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.ibs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  font-size: 13.5px;
  font-weight: 600;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.18s ease;
}

.ibs-btn:hover {
  transform: translateY(-1px);
}

.ibs-btn:disabled {
  opacity: 0.55;
  pointer-events: none;
}

.ibs-btn-primary {
  background: var(--ibs-blue);
  color: #fff;
  border-color: var(--ibs-blue);
}

.ibs-btn-primary:hover {
  background: var(--ibs-blue-dark);
  border-color: var(--ibs-blue-dark);
}

.ibs-btn-secondary {
  background: var(--ibs-surface);
  color: var(--ibs-text-soft);
  border-color: var(--ibs-border);
}

.ibs-btn-secondary:hover {
  border-color: #b0bcd0;
  background: var(--ibs-bg);
  color: var(--ibs-text);
}

.ibs-status {
  min-height: 24px;
  margin-top: 14px;
  font-size: 13px;
  color: var(--ibs-text-soft);
}

.ibs-results {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.ibs-result-card {
  background: var(--ibs-surface);
  border: 1px solid var(--ibs-border);
  border-radius: 8px;
  padding: 16px;
  box-shadow: var(--ibs-shadow);
}

.ibs-result-card h3 {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ibs-text);
}

.ibs-result-meta {
  display: grid;
  gap: 7px;
  color: var(--ibs-text-soft);
  font-size: 13px;
  line-height: 1.6;
}

.ibs-result-meta strong {
  color: var(--ibs-text);
}

.ibs-download-link {
  display: inline-flex;
  margin-top: 12px;
  text-decoration: none;
  background: var(--ibs-blue);
  color: #fff;
  padding: 9px 16px;
  border-radius: 6px;
  font-size: 13.5px;
  font-weight: 600;
  transition: background 0.18s ease;
}

.ibs-download-link:hover {
  background: var(--ibs-blue-dark);
}

.ibs-empty {
  color: var(--ibs-text-muted);
  font-size: 13px;
}

@media (max-width: 768px) {
  .ibs-settings-grid {
    grid-template-columns: 1fr;
  }

  .ibs-preset-grid,
  .ibs-preview-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .ibs-tool-card {
    padding: 18px 16px;
  }

  .ibs-page {
    padding: 18px 14px 44px;
  }

  .ibs-actions {
    flex-direction: column;
  }

  .ibs-btn {
    width: 100%;
  }

  .ibs-selection-summary {
    flex-direction: column;
    gap: 8px;
  }
}