:root {
  color-scheme: light;
  --scr-ink: #172126;
  --scr-muted: #637078;
  --scr-line: #b9c8c3;
  --scr-line-soft: #d8e2de;
  --scr-paper: #ffffff;
  --scr-page: #edf3f0;
  --scr-mint: #0d756d;
  --scr-mint-dark: #075b55;
  --scr-mint-soft: #dcefeb;
  --scr-coral: #d95745;
  --scr-coral-soft: #f8e7e3;
  --scr-blue-soft: #e5edf4;
  --scr-shadow: 0 12px 28px rgba(18, 45, 42, 0.09);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--scr-page);
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--scr-ink);
  background: var(--scr-page);
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: 0;
}

button,
input,
label {
  font: inherit;
  letter-spacing: 0;
}

button,
.scr-button {
  min-height: 42px;
}

button:focus-visible,
input:focus-visible,
.scr-upload-slot:focus-visible,
.scr-preview-frame:focus-visible,
.scr-button:focus-visible {
  outline: 3px solid rgba(13, 117, 109, 0.34);
  outline-offset: 2px;
}

button:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.scr-visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.scr-page-header {
  width: min(1320px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 18px;
}

.scr-back-link {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  color: var(--scr-mint-dark);
  font-weight: 700;
  text-decoration: none;
}

.scr-back-link:hover {
  text-decoration: underline;
}

.scr-eyebrow,
.scr-panel-kicker {
  margin: 12px 0 2px;
  color: var(--scr-mint-dark);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.scr-page-header h1 {
  margin: 0;
  max-width: 880px;
  font-size: 40px;
  line-height: 1.15;
  letter-spacing: 0;
}

.scr-page-header h1 span + span::before {
  content: "";
}

.scr-lead {
  margin: 8px 0 0;
  max-width: 780px;
  color: #4f5c63;
  font-size: 16px;
}

main {
  width: 100%;
}

.scr-tool {
  width: min(1320px, calc(100% - 32px));
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid var(--scr-line);
  border-radius: 8px;
  background: var(--scr-paper);
  box-shadow: var(--scr-shadow);
}

.scr-mobile-tabs {
  display: none;
}

.scr-workspace {
  display: grid;
  grid-template-columns: 280px minmax(440px, 1fr) 320px;
  height: clamp(520px, calc(100dvh - 205px), 720px);
  min-height: 520px;
}

.scr-panel {
  min-width: 0;
  background: var(--scr-paper);
}

.scr-panel + .scr-panel {
  border-left: 1px solid var(--scr-line);
}

.scr-images-panel,
.scr-controls-panel {
  display: flex;
  max-height: clamp(520px, calc(100vh - 205px), 720px);
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
  padding: 18px;
}

.scr-preview-panel {
  display: flex;
  min-height: 0;
  flex-direction: column;
}

.scr-panel-header h2,
.scr-preview-toolbar h2,
.scr-about h2 {
  margin: 0;
  font-size: 21px;
  line-height: 1.28;
}

.scr-panel-kicker {
  margin: 0 0 2px;
}

.scr-panel-note,
.scr-section-note,
.scr-paste-note,
.scr-file-meta,
.scr-inline-status,
.scr-notice {
  margin: 0;
  color: var(--scr-muted);
  font-size: 13px;
}

.scr-upload-slot {
  border: 1px solid var(--scr-line);
  border-radius: 7px;
  background: #fbfcfc;
}

.scr-upload-slot.is-paste-target {
  border-color: var(--scr-mint);
  box-shadow: inset 0 0 0 1px var(--scr-mint);
}

.scr-upload-slot.is-dragover {
  border-color: var(--scr-coral);
  background: var(--scr-coral-soft);
}

.scr-slot-heading {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 10px;
  padding: 10px 12px 7px;
}

.scr-slot-heading > div {
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.scr-slot-heading strong {
  line-height: 1.3;
}

.scr-slot-heading span:not(.scr-slot-mark) {
  color: var(--scr-muted);
  font-size: 12px;
}

.scr-slot-mark {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--scr-mint);
  font-size: 13px;
  font-weight: 800;
}

.scr-slot-mark-after {
  background: var(--scr-coral);
}

.scr-drop-zone {
  display: grid;
  min-height: 118px;
  margin: 0 10px;
  overflow: hidden;
  place-items: center;
  border: 1px dashed #8ba29b;
  background: #f3f7f5;
}

.scr-drop-zone p {
  max-width: 190px;
  margin: 0;
  padding: 12px;
  color: #52635e;
  text-align: center;
  overflow-wrap: anywhere;
}

.scr-thumb {
  display: block;
  width: 100%;
  height: 118px;
  object-fit: contain;
  background: #e5ece9;
}

.scr-file-meta {
  min-height: 22px;
  padding: 7px 12px 2px;
  overflow-wrap: anywhere;
}

.scr-slot-actions,
.scr-image-actions,
.scr-align-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 8px 10px 10px;
}

.scr-image-actions {
  margin-top: auto;
  padding: 0;
}

.scr-image-actions .scr-button-danger {
  grid-column: 1 / -1;
}

.scr-button,
.scr-mode-grid button,
.scr-segmented button,
.scr-mobile-tabs button {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  justify-content: center;
  border: 1px solid #9cafaa;
  border-radius: 6px;
  color: var(--scr-ink);
  background: #fff;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  overflow-wrap: anywhere;
}

.scr-button:hover:not(:disabled),
.scr-mode-grid button:hover:not(:disabled),
.scr-segmented button:hover:not(:disabled) {
  border-color: var(--scr-mint);
}

.scr-button-primary {
  border-color: var(--scr-mint);
  color: #fff;
  background: var(--scr-mint);
}

.scr-button-primary:hover:not(:disabled) {
  border-color: var(--scr-mint-dark);
  background: var(--scr-mint-dark);
}

.scr-button-danger {
  border-color: #c79188;
  color: #88372c;
  background: #fff8f6;
}

.scr-button-quiet {
  color: #57635f;
  background: #f6f8f7;
}

.scr-button-full {
  width: 100%;
  margin-top: 8px;
}

.scr-paste-note {
  padding: 8px 10px;
  border-left: 3px solid var(--scr-mint);
  background: var(--scr-mint-soft);
}

.scr-preview-toolbar {
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--scr-line);
}

.scr-display-control {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 8px;
  color: var(--scr-muted);
  font-size: 12px;
  font-weight: 700;
}

.scr-segmented {
  display: grid;
  width: 220px;
  grid-template-columns: repeat(3, 1fr);
}

.scr-segmented button {
  min-height: 36px;
  border-radius: 0;
  font-size: 12px;
}

.scr-segmented button:first-child {
  border-radius: 6px 0 0 6px;
}

.scr-segmented button:last-child {
  border-radius: 0 6px 6px 0;
}

.scr-segmented button + button {
  border-left: 0;
}

.scr-segmented button[aria-pressed="true"],
.scr-mode-grid button[aria-pressed="true"] {
  border-color: var(--scr-mint);
  color: #fff;
  background: var(--scr-mint);
}

.scr-preview-frame {
  position: relative;
  display: flex;
  min-height: 0;
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #dfe8e4;
  overscroll-behavior: contain;
}

.scr-preview-frame.is-width,
.scr-preview-frame.is-actual {
  align-items: flex-start;
  justify-content: flex-start;
  overflow: auto;
}

.scr-preview-placeholder {
  max-width: 300px;
  margin: auto;
  padding: 24px;
  color: #62716c;
  text-align: center;
}

.scr-preview-surface {
  position: relative;
  flex: 0 0 auto;
  margin: 12px auto;
  overflow: hidden;
  border: 1px solid #9aaba5;
  background: #e8eeeb;
  box-shadow: 0 8px 20px rgba(18, 41, 39, 0.14);
  touch-action: pan-y;
}

.scr-preview-frame.is-actual .scr-preview-surface {
  margin: 12px;
  touch-action: pan-x pan-y;
}

.scr-preview-surface.is-draggable {
  cursor: grab;
}

.scr-preview-surface.is-dragging {
  cursor: grabbing;
}

#previewCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.scr-preview-label {
  position: absolute;
  top: 8px;
  z-index: 3;
  padding: 3px 7px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 4px;
  color: #fff;
  background: rgba(23, 33, 38, 0.78);
  font-size: 11px;
  font-weight: 800;
  line-height: 1.2;
  pointer-events: none;
}

.scr-preview-label-before {
  right: 8px;
}

.scr-preview-label-after {
  left: 8px;
  background: rgba(174, 57, 42, 0.86);
}

.scr-slide-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 4;
  width: 36px;
  transform: translateX(-50%);
  border: 0;
  outline: 0;
  background: transparent;
  cursor: ew-resize;
  touch-action: none;
  user-select: none;
}

.scr-slide-handle::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  background: #fff;
  box-shadow: 0 0 0 1px rgba(13, 117, 109, 0.7);
  content: "";
}

.scr-slide-handle::after {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 20px;
  height: 34px;
  place-items: center;
  transform: translate(-50%, -50%);
  border: 2px solid #fff;
  border-radius: 6px;
  box-shadow: 0 0 0 1px rgba(13, 117, 109, 0.72);
  color: #fff;
  background: var(--scr-mint);
  content: "↔";
  font-size: 13px;
  font-weight: 900;
  line-height: 1;
}

.scr-slide-handle:hover::after,
.scr-slide-handle:focus-visible::after,
.scr-slide-handle.is-dragging::after {
  background: #075f59;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.9), 0 0 0 5px rgba(13, 117, 109, 0.72);
}

.scr-preview-footer {
  display: grid;
  min-height: 76px;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  border-top: 1px solid var(--scr-line);
  background: #fbfcfc;
}

.scr-preview-footer div {
  display: flex;
  flex-direction: column;
}

.scr-preview-footer span {
  color: var(--scr-muted);
  font-size: 11px;
}

.scr-preview-footer strong {
  font-size: 13px;
  white-space: nowrap;
}

.scr-preview-footer p {
  margin: 0;
  color: var(--scr-muted);
  font-size: 12px;
  text-align: right;
}

.scr-control-section {
  padding: 0 0 14px;
  border-bottom: 1px solid var(--scr-line-soft);
}

.scr-control-section h3 {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.3;
}

.scr-mode-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
}

.scr-mode-grid button {
  min-height: 40px;
}

.scr-mode-options {
  margin-top: 12px;
}

.scr-mode-options label,
.scr-control-section > label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  font-weight: 700;
}

input[type="range"] {
  width: 100%;
  min-height: 34px;
  accent-color: var(--scr-mint);
}

input[type="number"] {
  width: 100%;
  min-height: 40px;
  border: 1px solid #9cafaa;
  border-radius: 5px;
  background: #fff;
  padding: 7px 9px;
}

.scr-coordinate-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 10px 0;
}

.scr-coordinate-grid label {
  font-size: 12px;
  font-weight: 700;
}

.scr-coordinate-grid input {
  display: block;
  margin-top: 4px;
}

.scr-scale-number {
  margin-top: 3px;
}

.scr-align-actions {
  grid-template-columns: repeat(3, 1fr);
  padding: 9px 0 0;
}

.scr-align-actions .scr-button {
  min-height: 40px;
  padding-inline: 5px;
  font-size: 12px;
}

.scr-diff-summary {
  display: grid;
  gap: 6px;
  margin: 8px 0 0;
}

.scr-diff-summary div {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 8px;
  padding: 7px 8px;
  background: #f3f6f5;
}

.scr-diff-summary dt {
  color: var(--scr-muted);
  font-size: 12px;
}

.scr-diff-summary dd {
  min-width: 0;
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.scr-notice {
  margin-top: 8px;
  padding: 7px 8px;
  border-left: 3px solid #b28739;
  color: #68501e;
  background: #fff7e7;
}

.scr-save-section {
  border-bottom: 0;
}

.scr-status-wrap {
  margin-top: auto;
}

.scr-status,
.scr-error {
  margin: 0;
  padding: 9px 10px;
  border-radius: 5px;
  font-size: 12px;
  overflow-wrap: anywhere;
}

.scr-status {
  border-left: 3px solid var(--scr-mint);
  background: var(--scr-mint-soft);
}

.scr-error {
  margin-top: 8px;
  border-left: 3px solid var(--scr-coral);
  color: #7d2e24;
  background: var(--scr-coral-soft);
}

.scr-ad-reserve {
  display: grid;
  width: min(1180px, calc(100% - 32px));
  min-height: 108px;
  margin: 28px auto;
  place-items: center;
  border-block: 1px solid #ccd7d3;
  color: #899590;
  background: #f4f7f6;
  font-size: 11px;
  font-weight: 700;
}

.scr-about {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto 34px;
}

.scr-comments {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto 34px;
}

.scr-about p {
  margin: 8px 0;
  color: #4f5c63;
}

.scr-footer {
  display: flex;
  width: min(1320px, calc(100% - 32px));
  margin: 0 auto;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding: 22px 0 34px;
  border-top: 1px solid var(--scr-line);
  color: var(--scr-muted);
  font-size: 13px;
}

.scr-footer a {
  color: var(--scr-mint-dark);
  font-weight: 700;
}

.scr-footer span {
  margin-left: auto;
}

@media (max-width: 1100px) {
  .scr-page-header,
  .scr-tool,
  .scr-footer {
    width: min(960px, calc(100% - 24px));
  }

  .scr-mobile-tabs {
    position: sticky;
    top: 0;
    z-index: 20;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-bottom: 1px solid var(--scr-line);
    background: #fff;
  }

  .scr-mobile-tabs button {
    min-height: 48px;
    border: 0;
    border-radius: 0;
    color: #55625e;
    background: #fff;
  }

  .scr-mobile-tabs button + button {
    border-left: 1px solid var(--scr-line);
  }

  .scr-mobile-tabs button[aria-selected="true"] {
    color: var(--scr-mint-dark);
    background: var(--scr-mint-soft);
    box-shadow: inset 0 -3px 0 var(--scr-mint);
  }

  .scr-workspace {
    display: block;
    height: auto;
    min-height: 0;
  }

  .scr-panel,
  .scr-panel + .scr-panel {
    display: none;
    border-left: 0;
  }

  body[data-mobile-panel="images"] #imagesPanel,
  body[data-mobile-panel="preview"] #previewPanel,
  body[data-mobile-panel="controls"] #controlsPanel {
    display: flex;
  }

  .scr-images-panel,
  .scr-controls-panel {
    max-height: none;
    min-height: 580px;
    overflow: visible;
  }

  .scr-preview-panel {
    min-height: 600px;
  }

  .scr-preview-frame {
    height: clamp(380px, 60vh, 610px);
    flex: 0 0 auto;
  }

  .scr-preview-footer {
    min-height: 82px;
  }
}

@media (max-width: 540px) {
  .scr-page-header {
    width: calc(100% - 24px);
    padding: 14px 0 12px;
  }

  .scr-page-header h1 {
    font-size: 28px;
    line-height: 1.18;
  }

  .scr-page-header h1 span {
    display: block;
  }

  .scr-lead {
    font-size: 14px;
  }

  .scr-tool {
    width: calc(100% - 16px);
  }

  .scr-mobile-tabs button {
    min-height: 46px;
    font-size: 13px;
  }

  .scr-images-panel,
  .scr-controls-panel {
    min-height: 0;
    gap: 12px;
    padding: 14px;
  }

  .scr-panel-header h2,
  .scr-preview-toolbar h2 {
    font-size: 19px;
  }

  .scr-preview-toolbar {
    min-height: 94px;
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 10px 12px;
  }

  .scr-display-control {
    width: 100%;
  }

  .scr-segmented {
    width: auto;
    flex: 1;
  }

  .scr-preview-panel {
    min-height: 520px;
  }

  .scr-preview-frame {
    height: clamp(340px, 56dvh, 500px);
  }

  .scr-preview-footer {
    grid-template-columns: 1fr 1fr;
    gap: 7px 12px;
    padding: 9px 11px;
  }

  .scr-preview-footer p {
    grid-column: 1 / -1;
    text-align: left;
  }

  .scr-preview-label {
    top: 5px;
    font-size: 10px;
  }

  .scr-slide-handle::after {
    width: 18px;
    height: 30px;
  }

  .scr-slot-actions,
  .scr-image-actions {
    grid-template-columns: 1fr 1fr;
  }

  .scr-align-actions {
    grid-template-columns: 1fr 1fr;
  }

  .scr-align-actions .scr-button:last-child {
    grid-column: 1 / -1;
  }

  .scr-ad-reserve,
  .scr-about,
  .scr-comments,
  .scr-footer {
    width: calc(100% - 24px);
  }

  .scr-footer {
    flex-direction: column;
  }

  .scr-footer span {
    margin-left: 0;
  }
}

@media (max-width: 360px) {
  .scr-page-header h1 {
    font-size: 27px;
  }

  .scr-mobile-tabs button {
    font-size: 12px;
  }

  .scr-mode-grid button,
  .scr-button {
    font-size: 13px;
  }

  .scr-preview-frame {
    height: 350px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}