:root {
  color-scheme: light;
  --bg: #edf2f6;
  --panel: rgba(255, 255, 255, 0.94);
  --ink: #0f172a;
  --muted: #6b7280;
  --line: rgba(15, 23, 42, 0.08);
  --line-strong: rgba(15, 23, 42, 0.12);
  --blue: #0a84ff;
  --blue-dark: #005aec;
  --soft-blue: rgba(10, 132, 255, 0.12);
  --green: #0f8a5f;
  --danger: #d14343;
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --shadow: 0 28px 70px rgba(15, 23, 42, 0.08);
  --font-sans: Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  font-family: var(--font-sans);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.95), transparent 38%),
    radial-gradient(circle at top right, rgba(173, 217, 255, 0.42), transparent 28%),
    linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
  color: var(--ink);
  font-family: var(--font-sans);
}

button,
input,
select {
  font: inherit;
}

button {
  min-height: 44px;
  border: 1px solid rgba(10, 132, 255, 0.24);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--ink);
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}

button:hover,
button:focus-visible {
  border-color: var(--blue);
  box-shadow: 0 12px 24px rgba(10, 132, 255, 0.14);
  outline: none;
}

button:active {
  transform: translateY(1px);
}

button:disabled,
input:disabled,
select:disabled {
  border-color: var(--line);
  background: #f2f5f8;
  color: #98a2b3;
  cursor: not-allowed;
  box-shadow: none;
}

svg {
  display: block;
}

.crop-shell {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: 24px;
}

.app-hero,
.panel {
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: var(--radius-xl);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.app-hero {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 18px;
  margin-bottom: 26px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.hero-main {
  min-width: 0;
  text-align: center;
}

.app-hero h1 {
  margin: 0;
  font-size: 36px;
  letter-spacing: 0;
  line-height: 1.18;
  padding-bottom: 2px;
}

.tool-tabs,
.mode-tabs {
  display: flex;
  gap: 8px;
  padding: 5px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 999px;
  background: rgba(238, 244, 251, 0.86);
}

.tool-tabs {
  width: fit-content;
  margin: 0 auto;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.74);
}

.tool-tab,
.mode-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.tool-tab.active,
.mode-tab.active {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 10px 22px rgba(10, 132, 255, 0.22);
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 430px);
  gap: 20px;
  align-items: start;
}

.stage-panel,
.tool-panel {
  min-width: 0;
  padding: 22px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-title h2 {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.25;
}

.section-title span {
  color: var(--muted);
  font-weight: 500;
}

#sliceMeta {
  color: #667085;
  font-size: 16px;
  line-height: 1.35;
  font-weight: 500;
}

.compact-title {
  margin-top: 18px;
}

.stage-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 12px;
}

.ghost-button {
  min-height: 38px;
  padding: 0 14px;
  border-radius: 13px;
}

.subtle-button {
  display: none;
}

.subtle-button.visible {
  display: inline-flex;
  align-items: center;
}

.canvas-wrap {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(45deg, #e8eef5 25%, transparent 25%),
    linear-gradient(-45deg, #e8eef5 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e8eef5 75%),
    linear-gradient(-45deg, transparent 75%, #e8eef5 75%);
  background-position: 0 0, 0 16px, 16px -16px, -16px 0;
  background-size: 32px 32px;
}

.canvas-wrap.dragover .drop-zone {
  border-color: var(--blue);
  background: #eef7ff;
}

#stageCanvas {
  display: block;
  width: 100%;
  min-height: 0;
  touch-action: none;
}

.drop-zone {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 12px;
  padding: 22px;
  border: 0;
  border-radius: var(--radius-lg);
  background: rgba(248, 251, 255, 0.9);
  cursor: pointer;
  text-align: center;
}

.drop-zone::after {
  content: "";
  position: absolute;
  inset: 20px;
  border: 2px dashed rgba(10, 132, 255, 0.26);
  border-radius: 18px;
  pointer-events: none;
}

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

.drop-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.upload-icon {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border-radius: 50%;
  background: var(--soft-blue);
}

.upload-icon svg {
  width: 30px;
  height: 30px;
  fill: var(--blue-dark);
}

.drop-zone strong {
  font-size: 1.05rem;
}

.magnifier {
  position: absolute;
  z-index: 20;
  display: none;
  width: 150px;
  padding: 8px;
  border: 1px solid rgba(10, 132, 255, 0.34);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.2);
  pointer-events: none;
}

.magnifier.visible {
  display: grid;
  gap: 6px;
}

.magnifier canvas {
  width: 132px;
  height: 132px;
  border-radius: 12px;
  background: #fff;
}

.magnifier span {
  color: var(--blue-dark);
  text-align: center;
  font-size: 12px;
  font-weight: 800;
}

.controls-stack {
  display: grid;
  gap: 18px;
}

.mode-tabs {
  width: 100%;
}

.mode-tab {
  flex: 1 1 0;
}

.tool-pane {
  display: none;
}

.tool-pane.active {
  display: block;
}

.number-grid,
.export-grid,
.button-row {
  display: grid;
  gap: 12px;
}

.number-grid,
.export-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  display: grid;
  gap: 8px;
  color: #344054;
  font-size: 13px;
  font-weight: 700;
}

.range-field strong {
  color: #1f2937;
  font-size: 16px;
  font-weight: 500;
}

input,
select {
  width: 100%;
  min-height: 48px;
  height: 46px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.96);
  color: #1f2937;
  padding: 0 14px;
  font-size: 16px;
  font-weight: 500;
  outline: none;
}

select {
  font-weight: 500;
}

input::placeholder {
  color: #6b7280;
  font-size: 16px;
  font-weight: 500;
  opacity: 1;
}

input:focus,
select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(10, 132, 255, 0.14);
}

.range-field > span {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-weight: 700;
}

input[type="range"] {
  padding: 0;
  accent-color: var(--blue);
}

.export-box {
  margin-top: 14px;
}

.button-row {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 14px;
}

.button-row.compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

#slicePane .button-row {
  gap: 12px;
}

#slicePane .button-row.compact {
  margin-top: 12px;
}

#slicePane .button-row.compact button,
#slicePane #applySplitButton,
#slicePane #addGuideButton {
  min-height: 46px;
  border-color: rgba(10, 132, 255, 0.22);
  background: #fff;
}

#downloadCropButton,
#downloadZipButton {
  border-color: transparent;
  background: linear-gradient(180deg, var(--blue) 0%, #0a65e8 100%);
  color: #fff;
}

#downloadZipButton {
  width: 100%;
  margin-top: 14px;
}

.guide-tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 12px;
  margin-top: 4px;
}

.crop-box,
.guide-box,
.crop-export-box,
.slice-export-box {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.crop-box {
  margin-top: 18px;
}

.crop-box .compact-title {
  margin-top: 0;
}

.crop-export-box {
  padding-top: 24px;
}

.slice-export-box {
  padding-top: 24px;
}

.guide-actions {
  margin-top: 0;
  padding-top: 10px;
  border-top: 1px solid rgba(148, 163, 184, 0.16);
}

.guide-field {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
}

.guide-field input {
  min-height: 40px;
  height: 40px;
  border-radius: 8px;
  padding: 0 12px;
  color: #1f2937;
  font-size: 16px;
  font-weight: 500;
}

.guide-icon {
  display: grid;
  width: 36px;
  height: 40px;
  place-items: center;
  border-radius: 8px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(238, 244, 251, 0.86);
  color: #667085;
}

.guide-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.guide-icon svg.solid-icon {
  fill: currentColor;
  stroke: none;
  transform: scale(0.8);
  transform-origin: center;
}

.guide-list {
  display: grid;
  max-height: 220px;
  overflow: auto;
  gap: 8px;
  margin-top: 14px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  color: var(--muted);
  font-weight: 500;
}

.guide-list {
  max-height: 126px;
  min-height: 54px;
  align-content: center;
}

.slice-box {
  display: grid;
  gap: 0;
  margin-top: 14px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
}

.slice-list {
  display: grid;
  min-height: 76px;
  max-height: 220px;
  overflow: auto;
  gap: 8px;
}

.slice-actions {
  margin-top: 10px !important;
  padding-top: 10px;
  border-top: 1px solid rgba(148, 163, 184, 0.16);
}

.guide-item,
.slice-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font-weight: 500;
}

.slice-detail {
  color: #667085;
  font-size: 16px;
  font-weight: 500;
}

.guide-item button,
.slice-item button {
  min-height: 30px;
  padding: 0 10px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
}

.guide-item button {
  border-color: rgba(209, 67, 67, 0.26);
  color: var(--danger);
  font-weight: 500;
}

.slice-item.excluded {
  border-color: rgba(239, 68, 68, 0.24);
  background: rgba(254, 242, 242, 0.92);
  color: #667085;
}

.slice-item.excluded .slice-detail {
  color: #667085;
}

.slice-item.excluded button {
  color: var(--danger);
  border-color: rgba(209, 67, 67, 0.26);
  background: #fff;
}

.slice-item button {
  color: #667085;
  border-color: rgba(148, 163, 184, 0.24);
  background: #fff;
}

.export-box {
  padding-top: 4px;
}

#slicePane .export-box {
  margin-top: 14px;
}

#slicePane .export-grid {
  align-items: end;
  gap: 16px;
}

#slicePane .slice-export-box {
  margin-top: 14px;
  padding-top: 24px;
}

#cropPane .crop-export-box {
  padding-top: 24px;
}

#slicePane select {
  min-height: 52px;
}

#slicePane .range-field {
  align-self: stretch;
  grid-template-rows: auto 52px;
}

#slicePane .range-field input {
  align-self: center;
}

@media (max-width: 1080px) {
  .workspace-grid {
    grid-template-columns: 1fr;
  }

  .controls-stack {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .crop-shell {
    padding: 12px 10px 20px;
  }

  .app-hero {
    padding: 0;
    margin-bottom: 18px;
  }

  .app-hero h1 {
    font-size: 30px;
  }

  .tool-tabs {
    width: 100%;
  }

  .tool-tab {
    flex: 1 1 0;
    padding: 0 10px;
  }

  .stage-panel,
  .tool-panel {
    padding: 16px;
    border-radius: 24px;
  }

  .section-title {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .stage-actions {
    width: 100%;
    justify-content: space-between;
  }

  .number-grid,
  .export-grid,
  .button-row,
  .button-row.compact {
    grid-template-columns: 1fr;
  }

  .guide-tool-grid {
    grid-template-columns: 1fr;
  }
}