* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, "Noto Sans JP", sans-serif;
  background: #0f1115;
  color: #e9ebf0;
  line-height: 1.6;
  overflow-x: hidden;
  touch-action: manipulation;
}

html {
  overflow-x: hidden;
}

.app-header {
  padding: 20px 24px 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.app-header h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: 0.5px;
}

.app-header .sub {
  margin: 6px 0 0;
  color: #aeb4c2;
  font-size: 13px;
}

.layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  grid-template-areas: "preview controls";
  gap: 20px;
  padding: 20px 24px 24px;
  align-items: start;
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "preview"
      "controls";
  }
}

.controls {
  grid-area: controls;
  background: #161922;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 16px 16px 10px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.control-group label {
  display: block;
  font-size: 14px;
  margin-bottom: 6px;
  color: #c9ceda;
}

.control-group input,
.control-group select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #0f1115;
  color: #e9ebf0;
  font-size: 14px;
}

.control-group input[type="range"] {
  accent-color: #36d2ff;
  background: linear-gradient(90deg, rgba(54, 210, 255, 0.3), rgba(54, 210, 255, 0.1));
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
  font-size: 14px;
  color: #c9ceda;
}

.slider-value {
  color: #8f97aa;
  font-variant-numeric: tabular-nums;
}

.slider-number {
  width: 76px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #0f1115;
  color: #e9ebf0;
  font-size: 14px;
}

.control-inline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  background: rgba(255, 255, 255, 0.02);
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.control-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(255, 255, 255, 0.02);
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.row-config-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 8px;
  color: #c9ceda;
}

.row-config-header small {
  color: #8f97aa;
}

.row-config {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 8px;
}

.row-config .row-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.row-config .row-item span {
  font-size: 13px;
  color: #8f97aa;
  width: 46px;
}

.hint {
  display: block;
  color: #8f97aa;
  margin-top: 6px;
  font-size: 12px;
}

.credit-toggle {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(255, 255, 255, 0.02);
}

.inline-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #c9ceda;
}

.credit-config textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #0f1115;
  color: #e9ebf0;
  font-size: 14px;
  resize: vertical;
}

.credit-inline {
  margin-top: -4px;
}

.collapsible {
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.collapsible + .collapsible {
  margin-top: 10px;
}

.collapsible-toggle {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: #e9ebf0;
  font-weight: 700;
  font-size: 14px;
  padding: 12px 12px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background 0.15s ease;
}

.collapsible-toggle::after {
  content: "▼";
  font-size: 12px;
  opacity: 0.6;
  transition: transform 0.15s ease;
}

.collapsible-toggle.collapsed::after {
  content: "▲";
}

.collapsible-body {
  display: none;
  padding: 0 10px 10px;
}

.collapsible-body.open {
  display: block;
}

.collapsible:hover {
  border-color: rgba(54, 210, 255, 0.35);
  box-shadow: 0 8px 24px rgba(54, 210, 255, 0.08);
}

.collapsible-toggle:hover {
  background: rgba(54, 210, 255, 0.08);
}
.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.actions button {
  flex: 1;
  min-width: 180px;
  border: none;
  border-radius: 10px;
  padding: 10px 12px;
  background: linear-gradient(135deg, #2b7fff, #36d2ff);
  color: #0c0f16;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}

.actions button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(54, 210, 255, 0.3);
}

.actions button:active {
  transform: translateY(0);
}

.export {
  margin-top: 6px;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(255, 255, 255, 0.02);
}

.export-title {
  margin: 0 0 8px;
  color: #c9ceda;
  font-size: 14px;
}

.preview-wrap {
  grid-area: preview;
  background: #10131a;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 14px 16px 20px;
}

.preview-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
  color: #c9ceda;
}

.preview-label small {
  color: #8f97aa;
}

.preview {
  position: relative;
  width: var(--preview-w, 100%);
  height: var(--preview-h, auto);
  aspect-ratio: auto;
  margin: 0 auto;
  background: #ffffff;
  border-radius: 14px;
  border: 1px solid rgba(0, 0, 0, 0.12);
  overflow: hidden;
  box-shadow: none;
  transition: none;
  touch-action: none;
}

.preview::before {
  content: "";
  position: absolute;
  inset: 0;
  background: none;
  pointer-events: none;
}

.panel {
  position: absolute;
  border-radius: 0;
  background: rgba(0, 0, 0, 0.04);
  border: var(--stroke, 2px) solid rgba(0, 0, 0, 0.8);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
  overflow: visible;
  transition: background 0.12s ease, box-shadow 0.12s ease, outline-color 0.12s ease;
}

.panel:hover {
  background: rgba(54, 210, 255, 0.12);
  box-shadow: inset 0 0 0 1px rgba(54, 210, 255, 0.35);
}

.panel.selected {
  outline: 3px solid #36d2ff;
  outline-offset: 0;
  box-shadow: inset 0 0 0 1px rgba(54, 210, 255, 0.35);
}

.panel.no-border {
  border-color: transparent;
  box-shadow: none;
}

.credit-overlay {
  position: absolute;
  display: inline-flex;
  padding: 0;
  color: #000000;
  background: none;
  border: none;
  border-radius: 0;
  pointer-events: none;
  white-space: pre-wrap;
  line-height: 1.3;
  box-shadow: none;
}

.handle {
  position: absolute;
  top: 0;
  width: 18px;
  height: 100%;
  transform: translateX(-50%);
  cursor: col-resize;
  background: transparent;
  border-radius: 8px;
  opacity: 0;
  transition: opacity 0.12s ease, background 0.12s ease, box-shadow 0.12s ease;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

.handle.horizontal {
  left: 0;
  width: 100%;
  height: 18px;
  transform: translateY(-50%);
  cursor: row-resize;
}

.handle-line {
  position: absolute;
  top: 0;
  left: 50%;
  width: 3px;
  height: 100%;
  background: rgba(54, 210, 255, 0.8);
  transform: translateX(-50%);
  opacity: 0.7;
}

.handle.horizontal .handle-line {
  top: 50%;
  left: 0;
  width: 100%;
  height: 3px;
  transform: translateY(-50%);
}

.preview:hover .handle {
  opacity: 0.25;
}

.handle:hover {
  opacity: 1;
  background: rgba(54, 210, 255, 0.12);
  box-shadow: 0 0 0 1px rgba(54, 210, 255, 0.25);
}

.handle:hover .handle-line,
.handle.dragging .handle-line {
  opacity: 1;
}

.handle.dragging {
  opacity: 1;
  background: rgba(54, 210, 255, 0.2);
  box-shadow: 0 0 0 2px rgba(54, 210, 255, 0.35);
}

.handle::after {
  content: attr(data-label);
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(54, 210, 255, 0.9);
  color: #0c0f16;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  opacity: 0;
  transition: opacity 0.12s ease;
  pointer-events: none;
}

.handle.horizontal::after {
  top: 50%;
  left: auto;
  right: 6px;
  transform: translateY(-50%);
}

.handle:hover::after,
.handle.dragging::after {
  opacity: 1;
}

.panel-toggle {
  position: absolute;
  top: 6px;
  left: 6px;
  padding: 4px 8px;
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.4);
  background: rgba(255, 255, 255, 0.85);
  color: #0c0f16;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  display: none;
}

.panel.selected .panel-toggle {
  display: inline-block;
}

.panel-actions {
  margin-top: 8px;
}

.actions button.danger {
  background: linear-gradient(135deg, #ff5f6d, #ff7f50);
  color: #0c0f16;
}

.selection-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.05);
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 10px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.selection-text {
  color: #0c0f16;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.panel-tools {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: none;
  gap: 6px;
  background: rgba(255, 255, 255, 0.92);
  padding: 8px 10px;
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.16);
}

.panel.selected .panel-tools {
  display: inline-flex;
}

.panel-tools button {
  border: 1px solid rgba(0, 0, 0, 0.35);
  background: rgba(255, 255, 255, 0.98);
  color: #0c0f16;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.panel-tools button.danger {
  background: linear-gradient(135deg, #ff5f6d, #ff7f50);
  color: #0c0f16;
}

.panel-tools .ghost {
  background: rgba(12, 15, 22, 0.08);
}

.scale-presets {
  display: grid;
  grid-template-columns: repeat(4, minmax(60px, 1fr));
  gap: 6px;
  margin-top: 8px;
}

.scale-presets button {
  border: 1px solid rgba(54, 210, 255, 0.35);
  background: rgba(54, 210, 255, 0.12);
  color: #e9ebf0;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  transition: background 0.12s ease, box-shadow 0.12s ease;
}

.scale-presets button:hover {
  background: rgba(54, 210, 255, 0.2);
  box-shadow: 0 4px 12px rgba(54, 210, 255, 0.25);
}

.scale-presets button:active {
  transform: translateY(1px);
}

@media (max-width: 768px) {
  .layout {
    padding: 16px;
    gap: 14px;
  }

  .controls {
    padding: 12px;
  }

  .preview-wrap {
    padding: 12px;
  }

  .actions button {
    min-width: 140px;
  }
}

@media (max-width: 600px) {
  .selection-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .panel-tools {
    width: 90%;
    flex-wrap: wrap;
    justify-content: center;
  }

  .panel-tools button {
    flex: 1 1 46%;
    text-align: center;
  }

  .handle {
    width: 14px;
  }

  .handle.horizontal {
    height: 14px;
  }

  .scale-presets {
    grid-template-columns: repeat(2, minmax(80px, 1fr));
  }

  .actions button {
    min-width: 120px;
  }
}
/* ===== ATOM-BOX wrapper overrides ===== */
body.tool-page {
  margin: 0;
  padding: 0;
  font-family: "Hiragino Sans", "Yu Gothic UI", "BIZ UDPGothic", sans-serif;
  color: var(--text, #12233f);
  background:
    radial-gradient(circle at 15% -10%, #e8fbf8 0%, transparent 42%),
    radial-gradient(circle at 85% 0%, #eaf0ff 0%, transparent 38%),
    linear-gradient(180deg, #f7fafc 0%, #eef3f8 60%);
  min-height: 100vh;
}

html {
  overflow-x: clip;
}

.tool-layout {
  width: min(1800px, 100%);
  margin: 0 auto;
  padding: 14px 20px 30px;
  display: grid;
  grid-template-columns: minmax(160px, 220px) minmax(980px, 1320px) minmax(160px, 220px);
  gap: 18px;
  justify-content: center;
  align-items: start;
}

.side-ad {
  position: sticky;
  top: calc(50vh - 260px);
  align-self: start;
  height: max-content;
  z-index: 1;
}

.side-ad-box {
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: static;
  transform: none;
  height: max-content;
}

.manga-koma-container {
  width: 100%;
  max-width: none;
  padding: 0;
}

.mobile-center-ad {
  display: none;
  margin-bottom: 14px;
}

.manga-koma-app {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
}

.card-section {
  margin-top: 26px;
  max-width: 1320px;
  margin-inline: auto;
}

.about-tool.card-section {
  max-width: 520px;
}

.article-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(244, 249, 255, 0.92) 100%);
  border: 1px solid #dbe3ec;
  border-radius: 16px;
  padding: 22px 20px;
  box-shadow: 0 6px 16px rgba(15, 31, 56, 0.06);
  --article-content-width: 860px;
}

.article-card h2 {
  max-width: min(100%, var(--article-content-width));
  margin: 0 auto 18px;
  font-size: 1.45rem;
  text-align: left;
  color: #102a4a;
}

.article-body {
  max-width: min(100%, var(--article-content-width));
  margin-inline: auto;
}

.article-body h3 {
  margin: 20px 0 10px;
  font-size: 1.16rem;
  color: #213653;
}

.article-card p {
  margin: 0 0 14px;
  line-height: 1.8;
  color: #334a66;
  font-size: 1.05rem;
}

.related-tools h2 {
  margin: 0 0 10px;
  font-size: 1.06rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.related-card {
  display: block;
  text-decoration: none;
  color: #102a4a;
  background: linear-gradient(180deg, #ffffff 0%, #f4f8ff 100%);
  border: 1px solid #dbe3ec;
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 6px 16px rgba(15, 31, 56, 0.06);
}

.related-card:hover {
  border-color: #0b7a75;
  transform: translateY(-1px);
}

.related-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.related-card p {
  margin: 0;
  color: #58708a;
  font-size: 0.9rem;
  line-height: 1.5;
}

.related-card.is-coming {
  opacity: 0.86;
  cursor: not-allowed;
}

.related-card.is-coming:hover {
  transform: none;
  border-color: #dbe3ec;
}

@media (max-width: 1360px) {
  .tool-layout {
    grid-template-columns: minmax(0, 1fr);
    width: min(1280px, 100%);
  }

  .side-ad {
    display: none;
  }

  .mobile-center-ad {
    display: block;
  }
}

@media (max-width: 1100px) {
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
}

/* White theme adjustment for work area */
.manga-koma-app .controls,
.manga-koma-app .preview-wrap {
  background: #ffffff;
  border: 1px solid #c7d3e1;
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(15, 31, 56, 0.08);
  padding: 16px;
}

.manga-koma-app .layout {
  gap: 22px;
  align-items: stretch;
}

.manga-koma-app .controls,
.manga-koma-app .preview-wrap {
  height: 100%;
}

.manga-koma-app .preview-label,
.manga-koma-app .selection-text {
  color: #213653;
}

.manga-koma-app .preview-label small {
  color: #58708a;
}

.manga-koma-app .preview-wrap {
  background: #ffffff;
}

.manga-koma-app .preview-label {
  background: #ffffff;
  border: 0;
  border-radius: 0;
  padding: 10px 12px;
  margin-bottom: 12px;
}

.manga-koma-app .preview-stage {
  background: #edf2f8;
  border: 1px solid #dbe3ec;
  border-radius: 12px;
  padding: 12px;
}

.manga-koma-app .selection-bar {
  background: #f3f7fc;
  border: 1px solid #dbe3ec;
}

.manga-koma-app .control-group input,
.manga-koma-app .control-group select,
.manga-koma-app .slider-number,
.manga-koma-app .credit-config textarea {
  background: #ffffff;
  color: #12233f;
  border: 1px solid #c9d3df;
}

.manga-koma-app .control-group label,
.manga-koma-app .inline-label,
.manga-koma-app .row-config-header,
.manga-koma-app .row-config-header small,
.manga-koma-app .row-config .row-item span {
  color: #334a66;
}

.manga-koma-app .control-inline,
.manga-koma-app .control-stack,
.manga-koma-app .row-config .row-item,
.manga-koma-app .credit-toggle,
.manga-koma-app .export,
.manga-koma-app .collapsible {
  background: #f8fbff;
  border-color: #dbe3ec;
}

.manga-koma-app .collapsible-toggle {
  color: #102a4a;
}

.manga-koma-app .export-title,
.manga-koma-app #exportSection .control-group label {
  color: #27405d;
}

.manga-koma-app .scale-presets button {
  color: #1e3956;
  background: #e7f2fb;
  border-color: #9dc8e8;
}

.manga-koma-app .scale-presets button:hover {
  background: #d8ebfa;
  box-shadow: 0 3px 8px rgba(54, 140, 220, 0.2);
}