:root {
  --bg: #edf2f1;
  --surface: #ffffff;
  --surface-muted: #f7faf9;
  --surface-strong: #eef7f6;
  --rail: #102a2e;
  --rail-soft: #18383d;
  --ink: #17252a;
  --ink-soft: #52666d;
  --ink-muted: #7b8d93;
  --line: #d7e2e1;
  --line-strong: #b8c9c8;
  --primary: #0f9f9a;
  --primary-dark: #087e7a;
  --primary-soft: #dff7f5;
  --accent: #f59e0b;
  --danger: #d9533f;
  --success: #16895b;
  --focus: rgba(15, 159, 154, 0.28);
  --shadow: 0 18px 40px rgba(21, 42, 46, 0.12);
  --shadow-sm: 0 8px 20px rgba(21, 42, 46, 0.08);
  --radius: 8px;
  --font-body: "Segoe UI", "Microsoft YaHei UI", "PingFang SC", sans-serif;
  --font-mono: "Cascadia Mono", "Consolas", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  background:
    linear-gradient(rgba(16, 42, 46, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 42, 46, 0.055) 1px, transparent 1px),
    var(--bg);
  background-size: 24px 24px;
  overflow-x: hidden;
}

button,
input,
select,
output {
  font: inherit;
}

button,
select,
input,
.choice-card {
  touch-action: manipulation;
}

[hidden] {
  display: none !important;
}

svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 12%, rgba(15, 159, 154, 0.12), transparent 24rem),
    radial-gradient(circle at 80% 18%, rgba(245, 158, 11, 0.1), transparent 20rem);
}

.app-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 12px;
  min-height: 100dvh;
  padding: 12px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 20;
  padding: 10px 12px;
  border-radius: var(--radius);
  background: var(--rail);
  color: #fff;
  text-decoration: none;
}

.skip-link:focus {
  top: 16px;
}

.app-header {
  display: grid;
  grid-template-columns: minmax(220px, auto) minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-height: 68px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.64);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.brand {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-width: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  background: var(--rail);
  color: #eafffb;
}

.brand__mark svg {
  width: 24px;
  height: 24px;
}

.brand h1 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.brand p {
  margin: 3px 0 0;
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.status-banner {
  min-height: 40px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: var(--surface-muted);
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.4;
}

.status-banner[data-tone="warning"] {
  border-color: rgba(245, 158, 11, 0.35);
  background: #fff7e7;
  color: #8a5b05;
}

.status-banner[data-tone="error"] {
  border-color: rgba(217, 83, 63, 0.35);
  background: #fff0ed;
  color: #9b321f;
}

.status-banner[data-tone="success"] {
  border-color: rgba(22, 137, 91, 0.28);
  background: #ebfaf3;
  color: #0f6e48;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  min-width: 0;
}

.workspace {
  display: grid;
  grid-template-columns: 316px minmax(0, 1fr) 352px;
  gap: 12px;
  align-items: start;
  min-height: calc(100dvh - 92px);
}

.control-rail,
.workbench,
.inspector {
  min-width: 0;
}

.control-rail,
.inspector {
  position: sticky;
  top: 12px;
  max-height: calc(100dvh - 24px);
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.control-rail {
  padding: 12px;
  background: var(--rail);
  color: #f4fbfa;
}

.inspector {
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.64);
  background: rgba(255, 255, 255, 0.94);
}

.workbench {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 10px;
  min-height: calc(100dvh - 92px);
}

.rail-section,
.inspector-section,
.summary-panel,
.stage-toolbar,
.stage-surface {
  border-radius: var(--radius);
}

.rail-section {
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--rail-soft);
}

.rail-section + .rail-section {
  margin-top: 10px;
}

.rail-section--source {
  background: #0b2226;
}

.inspector-section,
.summary-panel {
  padding: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.inspector-section + .inspector-section,
.summary-panel + .inspector-section,
.inspector-section + .summary-panel {
  margin-top: 10px;
}

.inspector-section--export {
  border-color: rgba(15, 159, 154, 0.38);
  background:
    linear-gradient(180deg, #ffffff 0%, #f0fbfa 100%);
  box-shadow: 0 10px 24px rgba(15, 159, 154, 0.12);
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.section-heading h2 {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.step-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  background: rgba(15, 159, 154, 0.16);
  color: #baf4ef;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
}

.inspector .step-chip {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.control-group {
  display: grid;
  gap: 10px;
}

.field,
.checkbox {
  display: grid;
  gap: 6px;
}

.field__label {
  color: inherit;
  font-size: 0.82rem;
  font-weight: 700;
}

.field__meta,
.info-strip {
  display: flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(244, 251, 250, 0.8);
  font-size: 0.88rem;
  line-height: 1.35;
  word-break: break-word;
}

.inspector .info-strip {
  border-color: var(--line);
  background: var(--surface-muted);
  color: var(--ink-soft);
}

select,
input[type="number"] {
  width: 100%;
  min-height: 44px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.09);
  color: #f8fffe;
  outline: none;
}

.inspector select,
.inspector input[type="number"] {
  border-color: var(--line);
  background: var(--surface-muted);
  color: var(--ink);
}

select option {
  color: var(--ink);
  background: #fff;
}

select:focus,
input[type="number"]:focus,
button:focus-visible,
.choice-card:focus-within,
.skip-link:focus {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

button:disabled,
select:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 44px;
  min-height: 44px;
  padding: 0 13px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 800;
  line-height: 1;
  text-align: center;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.button--primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(15, 159, 154, 0.22);
}

.button--primary:hover {
  background: var(--primary-dark);
}

.button--secondary {
  border-color: rgba(15, 159, 154, 0.4);
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.button--secondary:hover {
  border-color: var(--primary);
  background: #c8f0ec;
}

.button--ghost {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: currentColor;
}

.button--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
}

.inspector .button--ghost,
.app-header .button--ghost {
  border-color: var(--line);
  background: #ffffff;
  color: var(--ink);
}

.inspector .button--ghost:hover,
.app-header .button--ghost:hover {
  background: var(--surface-muted);
}

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

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

.choice-card {
  position: relative;
  display: grid;
  gap: 3px;
  min-height: 58px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
  cursor: pointer;
}

.choice-card:hover {
  border-color: rgba(15, 159, 154, 0.7);
}

.choice-card input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.choice-card span {
  font-weight: 800;
}

.choice-card small {
  color: rgba(244, 251, 250, 0.68);
}

.choice-card:has(input:checked) {
  border-color: var(--primary);
  background: rgba(15, 159, 154, 0.22);
}

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

.checkbox {
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: center;
  color: rgba(244, 251, 250, 0.84);
}

.checkbox input {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--primary);
}

#crop-status[data-state="pending"] {
  border-color: rgba(245, 158, 11, 0.26);
  color: #ffe4a8;
}

#crop-status[data-state="ready"] {
  border-color: rgba(15, 159, 154, 0.4);
  color: #baf4ef;
}

.stage-toolbar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.64);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-sm);
}

.view-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tab-button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  color: var(--ink-soft);
  cursor: pointer;
  font-weight: 800;
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

.tab-button:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
}

.tab-button.is-active {
  border-color: var(--primary);
  background: var(--rail);
  color: #ffffff;
}

.preview-feedback {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.4;
}

.stage-surface {
  position: relative;
  min-height: 620px;
  border: 1px solid rgba(255, 255, 255, 0.64);
  background:
    linear-gradient(rgba(16, 42, 46, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 42, 46, 0.055) 1px, transparent 1px),
    rgba(255, 255, 255, 0.92);
  background-size: 18px 18px;
  box-shadow: var(--shadow);
}

.canvas-empty-state {
  display: grid;
  place-items: center;
  min-height: 620px;
  padding: 18px;
}

.empty-state-card {
  display: grid;
  justify-items: center;
  gap: 14px;
  width: min(360px, 100%);
  padding: 32px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.empty-state-card > svg {
  width: 52px;
  height: 52px;
  color: var(--primary);
}

.empty-state-card h3 {
  margin: 0;
  font-size: 1.45rem;
  letter-spacing: 0;
}

.empty-state-card span {
  color: var(--ink-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.view-panels {
  min-height: 620px;
}

.view-panel {
  display: none;
}

.view-panel.is-active {
  display: block;
}

.canvas-stage,
.canvas-scroll {
  min-height: 580px;
  max-width: 100%;
  overflow: auto;
  padding: 14px;
}

.canvas-stage canvas,
.canvas-scroll canvas {
  display: block;
  max-width: 100%;
  margin: 0 auto;
  image-rendering: pixelated;
}

.canvas-meta {
  padding: 10px 14px 14px;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.board-view {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.processing-overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(237, 242, 241, 0.76);
  backdrop-filter: blur(3px);
}

.processing-card {
  display: grid;
  justify-items: center;
  gap: 12px;
  min-width: 210px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

.processing-card p {
  margin: 0;
  color: var(--ink-soft);
}

.processing-card__spinner {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 4px solid var(--primary-soft);
  border-top-color: var(--primary);
  animation: spin 0.8s linear infinite;
}

.summary-panel {
  display: grid;
  gap: 10px;
}

.big-stat {
  padding: 14px;
  border-radius: var(--radius);
  background: var(--rail);
  color: #ffffff;
}

.big-stat span,
.summary-card span {
  display: block;
  margin-bottom: 8px;
  color: currentColor;
  opacity: 0.72;
  font-size: 0.82rem;
  font-weight: 800;
}

.big-stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 3rem;
  line-height: 1;
  letter-spacing: 0;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.summary-card {
  min-height: 84px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-muted);
}

.summary-card strong {
  display: block;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.stats-table-wrap {
  max-height: 420px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.stats-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
}

.stats-table th,
.stats-table td {
  padding: 10px 9px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 0.86rem;
  vertical-align: middle;
}

.stats-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--surface-strong);
  color: var(--ink-soft);
  font-weight: 800;
}

.stats-color {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.swatch {
  width: 18px;
  height: 18px;
  border: 1px solid rgba(23, 37, 42, 0.22);
  border-radius: 4px;
  flex: 0 0 auto;
}

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

.export-grid .button:first-child {
  grid-column: 1 / -1;
}

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

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  border-radius: 999px;
  background: rgba(16, 42, 46, 0.28);
  background-clip: padding-box;
}

::-webkit-scrollbar-track {
  background: transparent;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 1320px) {
  .workspace {
    grid-template-columns: 300px minmax(0, 1fr);
  }

  .inspector {
    position: static;
    max-height: none;
    grid-column: 1 / -1;
  }
}

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

  .header-actions {
    justify-content: stretch;
  }

  .header-actions .button {
    flex: 1 1 0;
  }

  .workspace {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .control-rail,
  .inspector {
    position: static;
    max-height: none;
  }

  .workbench,
  .stage-surface,
  .canvas-empty-state,
  .view-panels,
  .canvas-stage,
  .canvas-scroll {
    min-height: 480px;
  }

  .stage-toolbar {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .app-shell {
    padding: 8px;
  }

  .brand {
    grid-template-columns: 38px minmax(0, 1fr);
  }

  .brand__mark {
    width: 38px;
    height: 38px;
  }

  .header-actions,
  .button-row,
  .choice-grid,
  .inline-fields,
  .summary-grid,
  .board-view,
  .export-grid {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .view-tabs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tab-button,
  .button {
    width: 100%;
  }

  .stats-table {
    min-width: 480px;
  }
}