:root {
  --ink: #12141b;
  --ink-soft: #4a5475;
  --paper: #ffffff;
  --sky: #4f86ff;
  --sky-dark: #295ed0;
  --sky-soft: #dce8ff;
  --lime: #93ea62;
  --cream: #fff5d3;
  --line: #12141b;
  --danger: #c12828;
  --shadow: 4px 4px 0 var(--line);
  --pages-col: clamp(188px, 13.5vw, 226px);
  --tool-col: clamp(120px, 8.2vw, 136px);
  --props-col: clamp(214px, 15.4vw, 248px);
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  position: relative;
  overflow: hidden;
  font-family: "Gaegu", cursive;
  color: var(--ink);
  background: #f4f7ff;
}

body::before,
body::after {
  content: "";
  position: fixed;
  left: 3%;
  width: 94%;
  border: 3px solid var(--line);
  border-radius: 60px;
  background: linear-gradient(180deg, #76a7ff, #5a93ff);
  z-index: 0;
}

body::before {
  top: 25%;
  height: 190px;
}

body::after {
  top: 63%;
  height: 210px;
}

.app-shell {
  position: relative;
  z-index: 1;
  height: 100%;
  width: 100%;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px;
  overflow: hidden;
}

.topbar {
  background: var(--paper);
  border: 3px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 10px 14px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
}

.brand-dot {
  width: 18px;
  height: 18px;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #bdfc8b, #59ce38);
}

.brand h1 {
  margin: 0;
  font-family: "VT323", monospace;
  font-size: 2.05rem;
  line-height: 1;
}

.brand p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1rem;
}

.topbar-actions {
  margin-left: auto;
  min-width: 0;
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 6px;
}

#fileInput {
  display: none;
}

.file-label,
.primary-btn,
.ghost-btn,
.tool-btn,
.ghost-input,
.property-panel select {
  border: 3px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  box-shadow: 2px 2px 0 var(--line);
  font-family: "VT323", monospace;
  font-size: 1.36rem;
  line-height: 1;
}

.file-label,
.primary-btn,
.ghost-btn,
.ghost-input {
  padding: 9px 13px;
}

.tool-btn {
  padding: 10px;
  text-align: left;
}

.tool-rail .tool-btn {
  width: 100%;
  display: block;
  padding: 8px 7px;
  font-size: 1.08rem;
  line-height: 1.08;
  letter-spacing: 0.01em;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.file-label,
.primary-btn,
.ghost-btn,
.tool-btn {
  cursor: pointer;
  transition: transform 0.12s ease;
}

.file-label:hover,
.primary-btn:hover,
.ghost-btn:hover,
.tool-btn:hover {
  transform: translate(-1px, -1px);
}

.file-label:active,
.primary-btn:active,
.ghost-btn:active,
.tool-btn:active {
  transform: translate(1px, 1px);
  box-shadow: none;
}

.ghost-input {
  min-width: 136px;
  cursor: pointer;
  appearance: none;
}

.primary-btn {
  background: linear-gradient(180deg, var(--sky), var(--sky-dark));
  color: #fff;
}

.ghost-btn {
  background: var(--sky-soft);
}

.ghost-btn[disabled],
.primary-btn[disabled] {
  opacity: 0.45;
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.workspace {
  flex: 1;
  width: 100%;
  min-height: 0;
  min-width: 0;
  display: grid;
  grid-template-columns: var(--pages-col) minmax(0, 1fr);
  gap: 10px;
}

.thumbnail-panel,
.tool-rail,
.stage-panel,
.property-panel {
  min-width: 0;
  border: 3px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.thumbnail-panel {
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
  background: #dce8ff;
}

.panel-heading h2,
.property-panel h2 {
  margin: 0;
  font-family: "VT323", monospace;
  font-size: 1.6rem;
}

.panel-heading p {
  margin: 2px 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
}

.thumbnail-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: auto;
  padding-right: 4px;
}

.thumbnail-item {
  border: 3px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: 2px 2px 0 var(--line);
  padding: 8px;
  display: grid;
  gap: 6px;
  cursor: pointer;
}

.thumbnail-item.active {
  background: #f5ffec;
  border-color: #205fc7;
}

.thumbnail-item canvas {
  width: 100%;
  border: 2px solid #c6d5fb;
  border-radius: 4px;
  background: #fff;
}

.thumb-label {
  font-family: "VT323", monospace;
  font-size: 1.3rem;
  color: var(--ink-soft);
}

.editor-surface {
  width: 100%;
  min-height: 0;
  min-width: 0;
  display: grid;
  grid-template-columns: var(--tool-col) minmax(0, 1fr) var(--props-col);
  gap: 10px;
}

.tool-rail {
  background: #ebffd9;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
}

.tool-btn.active {
  background: #dce8ff;
  border-color: #205fc7;
}

.tool-btn.danger {
  color: var(--danger);
}

.stage-panel {
  min-width: 0;
  min-height: 0;
  background: #fdfdff;
  display: flex;
  flex-direction: column;
}

.stage-toolbar {
  border-bottom: 3px solid var(--line);
  background: #edf4ff;
  padding: 8px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.stage-toolbar .ghost-btn {
  font-size: 1.22rem;
  padding: 8px 10px;
}

#pagePositionLabel {
  font-size: 1.2rem;
}

.zoom-control {
  font-family: "VT323", monospace;
  font-size: 1.28rem;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  line-height: 1;
}

.zoom-slider {
  width: 118px;
  accent-color: #2e66d9;
  cursor: pointer;
}

.zoom-slider:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.zoom-value {
  min-width: 58px;
  text-align: right;
  font-family: "VT323", monospace;
  font-size: 1.32rem;
  color: var(--ink);
}

.zoom-mini-btn {
  min-width: 42px;
  text-align: center;
  padding: 6px 8px !important;
}

.toolbar-divider {
  width: 2px;
  height: 24px;
  background: #8ea9e8;
}

.drop-hint {
  margin: 10px;
  border: 3px dashed #4178dd;
  border-radius: 10px;
  padding: 12px;
  background: #ecf4ff;
  text-align: center;
  font-family: "VT323", monospace;
  font-size: 1.38rem;
  color: #2c63ca;
}

.drop-hint.hidden {
  display: none;
}

.stage-scroller {
  flex: 1;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  padding: 14px;
  background:
    radial-gradient(circle at 12px 12px, #d8e6ff 2px, transparent 2px) 0 0 /
      22px 22px,
    #eff4ff;
}

.page-stage {
  min-height: 100%;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  width: max-content;
  min-width: 100%;
}

.pdf-page {
  position: relative;
  flex: 0 0 auto;
  border: 3px solid var(--line);
  border-radius: 4px;
  box-shadow: 6px 6px 0 rgba(16, 18, 24, 0.35);
  overflow: hidden;
}

.pdf-page canvas {
  display: block;
}

.bg-canvas {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
}

.draw-canvas {
  position: absolute;
  inset: 0;
  z-index: 3;
  width: 100%;
  height: 100%;
}

.pdf-page .canvas-container {
  position: absolute !important;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  z-index: 4;
}

.pdf-page .canvas-container canvas {
  width: 100% !important;
  height: 100% !important;
}

.inline-editor-input {
  position: absolute;
  z-index: 8;
  margin: 0;
  border: 1px dashed #1f74e8;
  background: rgba(255, 255, 255, 0.96);
  outline: none;
  padding: 0 1px;
  overflow: hidden;
  box-sizing: border-box;
  border-radius: 0;
  caret-color: #111827;
  font-kerning: normal;
  letter-spacing: normal;
}

.pdf-page .upper-canvas {
  touch-action: none;
}

.status-line {
  border-top: 3px solid var(--line);
  background: #fff;
  padding: 8px 12px;
  font-family: "VT323", monospace;
  font-size: 1.32rem;
  color: var(--ink-soft);
}

.property-panel {
  min-height: 0;
  background: var(--cream);
  padding: 12px;
  display: grid;
  grid-auto-rows: min-content;
  gap: 10px;
  overflow: auto;
}

.property-panel label {
  display: grid;
  gap: 4px;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.property-panel input[type="range"],
.property-panel select {
  width: 100%;
}

.property-panel input[type="number"] {
  width: 100%;
  border: 3px solid var(--line);
  border-radius: 10px;
  box-shadow: 2px 2px 0 var(--line);
  background: #fff;
  padding: 8px;
  font-family: "VT323", monospace;
  font-size: 1.25rem;
}

.property-panel select {
  padding: 8px;
}

.property-panel input[type="color"] {
  width: 100%;
  height: 36px;
  border: 3px solid var(--line);
  border-radius: 10px;
  box-shadow: 2px 2px 0 var(--line);
  background: #fff;
  padding: 3px;
}

.split-panel {
  margin-top: 6px;
  border: 3px solid var(--line);
  border-radius: 12px;
  background: #f0ffd8;
  padding: 10px;
  display: grid;
  gap: 8px;
  grid-column: 1 / -1;
}

.split-panel h3 {
  margin: 0;
  font-family: "VT323", monospace;
  font-size: 1.45rem;
}

.split-note {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.split-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.split-row label {
  gap: 3px;
}

.split-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.split-actions .ghost-btn {
  width: 100%;
  text-align: center;
}

.split-range-list {
  display: grid;
  gap: 6px;
  max-height: 132px;
  overflow: auto;
}

.split-range-item {
  border: 2px solid var(--line);
  border-radius: 9px;
  background: #fff;
  padding: 6px 8px;
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: space-between;
  font-family: "VT323", monospace;
  font-size: 1.2rem;
}

.split-range-item button {
  border: 2px solid var(--line);
  border-radius: 8px;
  background: #fff1ef;
  color: var(--danger);
  padding: 2px 8px;
  font-family: "VT323", monospace;
  font-size: 1.1rem;
  cursor: pointer;
}

.split-merge {
  display: flex !important;
  align-items: center;
  gap: 8px !important;
  color: var(--ink);
}

.split-merge input {
  width: 18px;
  height: 18px;
}

#splitPdfBtn {
  width: 100%;
  text-align: center;
}

@media (max-width: 1360px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .topbar-actions {
    justify-content: flex-start;
    margin-left: 0;
  }
}

@media (max-width: 980px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .thumbnail-panel {
    max-height: 220px;
  }

  .thumbnail-list {
    flex-direction: row;
  }

  .thumbnail-item {
    min-width: 160px;
  }

  .editor-surface {
    grid-template-columns: 120px minmax(0, 1fr);
  }

  .property-panel {
    grid-column: span 2;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  body::before,
  body::after {
    border-radius: 40px;
  }

  .editor-surface {
    grid-template-columns: 1fr;
  }

  .tool-rail {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .property-panel {
    grid-column: 1;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}