:root {
  color-scheme: light;
  --page: #f3f5f4;
  --surface: #ffffff;
  --surface-muted: #e9edeb;
  --ink: #17201d;
  --ink-soft: #59635f;
  --line: #ccd3cf;
  --line-strong: #9da8a3;
  --accent: #1769aa;
  --accent-soft: #dcecf8;
  --signal: #bb7a16;
  --stage: #0a1218;
  --stage-line: rgba(180, 211, 225, 0.11);
  --success: #1c7a55;
  --danger: #b33f3f;
  --font-ui: "Aptos", "IBM Plex Sans", "Noto Sans SC", "Microsoft YaHei UI", sans-serif;
  --font-mono: "Cascadia Code", "IBM Plex Mono", Consolas, monospace;
  font-synthesis: none;
  line-break: strict;
  overflow-wrap: break-word;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.65;
}

button,
input,
select {
  font: inherit;
}

button,
a,
select,
input {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  line-height: 1.3;
  text-wrap: balance;
  letter-spacing: 0;
}

p {
  color: var(--ink-soft);
  text-wrap: pretty;
}

code,
pre {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.app-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: grid;
  min-height: 64px;
  grid-template-columns: minmax(220px, 1fr) auto minmax(220px, 1fr);
  align-items: center;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--page) 92%, transparent);
  backdrop-filter: blur(16px);
}

.wordmark {
  display: inline-flex;
  width: max-content;
  align-items: baseline;
  gap: 7px;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
}

.wordmark span {
  color: var(--accent);
}

.wordmark strong {
  font-weight: 700;
}

.header-status {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 12px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
}

.header-status.is-ready .status-dot {
  background: var(--success);
}

.header-status.is-error .status-dot {
  background: var(--danger);
}

.header-nav {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
}

.header-nav a {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  padding: 7px 11px;
  border-radius: 5px;
  color: var(--ink-soft);
  font-weight: 600;
  text-decoration: none;
}

.header-nav a:hover,
.header-nav a:focus-visible {
  background: var(--surface-muted);
  color: var(--ink);
  outline: none;
}

.workbench {
  display: grid;
  min-height: calc(100vh - 64px);
  grid-template-columns: 250px minmax(420px, 1fr) 350px;
  border-bottom: 1px solid var(--line);
}

.mode-panel,
.inspector-panel {
  min-width: 0;
  padding: 24px;
  background: var(--surface);
}

.mode-panel {
  border-right: 1px solid var(--line);
}

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

.panel-heading {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.panel-heading.compact {
  margin-bottom: 20px;
}

.panel-index {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

.panel-heading h1,
.panel-heading h2 {
  font-size: 18px;
}

.panel-heading p,
.quick-path-heading p {
  margin-top: 3px;
  font-size: 12px;
}

.mode-groups {
  display: grid;
  gap: 22px;
}

.mobile-mode-select {
  display: none;
}

.mode-group {
  display: grid;
  gap: 4px;
}

.mode-group h2 {
  margin: 0 8px 5px;
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 700;
}

.mode-button {
  display: grid;
  min-height: 48px;
  grid-template-columns: 1fr;
  gap: 1px;
  padding: 6px 8px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.mode-button span {
  font-weight: 650;
}

.mode-button code {
  color: var(--ink-soft);
  font-size: 10px;
}

.mode-button:hover,
.mode-button:focus-visible {
  border-color: var(--line);
  background: var(--page);
  outline: none;
}

.mode-button.is-active {
  border-color: color-mix(in srgb, var(--accent) 30%, var(--line));
  background: var(--accent-soft);
  color: #0c4d80;
}

.mode-button.is-active code {
  color: #356d94;
}

.stage-panel {
  display: grid;
  min-width: 0;
  grid-template-rows: auto minmax(500px, 1fr) auto;
  background: var(--page);
}

.stage-toolbar {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
}

.stage-toolbar > div:first-child {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.stage-toolbar h2 {
  font-size: 17px;
}

.stage-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink-soft);
  font-size: 11px;
}

.stage-meta code {
  padding: 3px 6px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  color: var(--accent);
}

.render-stage {
  position: relative;
  display: grid;
  min-height: 500px;
  overflow: hidden;
  place-items: center;
  padding: 36px;
  background: var(--stage);
}

.stage-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--stage-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--stage-line) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(to bottom, transparent, black 18%, black 82%, transparent);
}

#glassPreview {
  position: relative;
  z-index: 2;
  display: block;
  width: min(100%, 560px);
  height: 220px;
  border-radius: 8px;
  transition: height 220ms ease;
}

.event-console {
  display: grid;
  min-height: 78px;
  grid-template-columns: 56px 1fr;
  gap: 10px;
  align-items: start;
  padding: 14px 24px;
  border-top: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}

.event-label {
  color: var(--accent);
  font-weight: 700;
}

.event-console ol {
  display: grid;
  min-width: 0;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.event-console li {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.control-form {
  display: grid;
  gap: 16px;
}

.control-form fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.control-form legend,
.control-row label,
.range-label label {
  margin-bottom: 6px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 650;
}

.segmented-control {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--page);
}

.segmented-control label {
  position: relative;
  cursor: pointer;
}

.segmented-control input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented-control span {
  display: grid;
  min-height: 36px;
  place-items: center;
  border-radius: 4px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 650;
}

.segmented-control input:checked + span {
  background: var(--surface);
  color: var(--ink);
  box-shadow: 0 1px 4px rgba(20, 32, 27, 0.14);
}

.segmented-control input:focus-visible + span {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.control-row {
  display: grid;
}

.control-row select {
  width: 100%;
  min-height: 42px;
  padding: 8px 34px 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
}

.control-row select:focus-visible,
.range-control input:focus-visible,
.copy-button:focus-visible,
.docs-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.range-control {
  display: grid;
  gap: 7px;
}

.range-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.range-label label {
  margin: 0;
}

.range-label output {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
}

.range-control input {
  width: 100%;
  accent-color: var(--accent);
}

.toggle-control {
  display: grid;
  min-height: 48px;
  grid-template-columns: 36px 1fr;
  gap: 10px;
  align-items: center;
  cursor: pointer;
}

.toggle-control input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-track {
  position: relative;
  width: 36px;
  height: 20px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface-muted);
}

.toggle-track::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-soft);
  content: "";
  transition: transform 160ms ease, background 160ms ease;
}

.toggle-control input:checked + .toggle-track {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.toggle-control input:checked + .toggle-track::after {
  background: var(--accent);
  transform: translateX(16px);
}

.toggle-control input:focus-visible + .toggle-track {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.toggle-control strong,
.toggle-control small {
  display: block;
}

.toggle-control strong {
  font-size: 13px;
}

.toggle-control small {
  color: var(--ink-soft);
  font-size: 11px;
}

.code-tool {
  margin-top: 22px;
  border: 1px solid #27343c;
  border-radius: 8px;
  overflow: hidden;
  background: #111a20;
  color: #dbe7ec;
}

.code-toolbar {
  display: flex;
  min-height: 46px;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px 8px 14px;
  border-bottom: 1px solid #2b3941;
}

.code-toolbar h3 {
  color: #cbd7dc;
  font-size: 12px;
  font-weight: 650;
}

.copy-button {
  min-width: 58px;
  min-height: 32px;
  padding: 5px 10px;
  border: 1px solid #3a4b54;
  border-radius: 5px;
  background: #1e2a31;
  color: #e5eef1;
  cursor: pointer;
  font-size: 12px;
}

.copy-button:hover {
  background: #2a3a43;
}

.code-tool pre {
  max-height: 310px;
  margin: 0;
  overflow: auto;
  padding: 16px;
  font-size: 11px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.quick-path {
  display: grid;
  grid-template-columns: 230px 1fr auto;
  gap: 36px;
  align-items: center;
  padding: 42px max(24px, calc((100vw - 1280px) / 2));
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.quick-path-heading {
  display: flex;
  gap: 12px;
}

.quick-path-heading h2 {
  font-size: 18px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  min-width: 0;
  grid-template-columns: 26px 1fr;
  column-gap: 8px;
  padding: 8px 18px;
  border-left: 1px solid var(--line);
}

.steps li > span {
  grid-row: 1 / 3;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
}

.steps strong {
  font-size: 13px;
}

.steps code {
  overflow: hidden;
  color: var(--ink-soft);
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.docs-link {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
}

.docs-link:hover {
  background: #0f578f;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  padding: 22px 24px;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}

@media (max-width: 1180px) {
  .workbench {
    grid-template-columns: 210px minmax(420px, 1fr);
  }

  .inspector-panel {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 220px minmax(300px, 0.8fr) minmax(420px, 1.2fr);
    gap: 26px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .code-tool {
    margin-top: 0;
  }

  .quick-path {
    grid-template-columns: 200px 1fr;
  }

  .quick-path .docs-link {
    grid-column: 2;
    width: max-content;
  }
}

@media (max-width: 820px) {
  .app-header {
    grid-template-columns: 1fr auto;
    padding: 0 16px;
  }

  .header-status {
    display: none;
  }

  .header-nav a:last-child {
    display: none;
  }

  .workbench {
    display: block;
  }

  .mode-panel {
    padding: 18px 16px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .mode-panel .panel-heading {
    margin-bottom: 14px;
  }

  .mode-groups {
    display: none;
  }

  .mobile-mode-select {
    display: grid;
    gap: 6px;
  }

  .mobile-mode-select span {
    color: var(--ink-soft);
    font-size: 12px;
    font-weight: 650;
  }

  .mobile-mode-select select {
    width: 100%;
    min-height: 46px;
    padding: 8px 34px 8px 11px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--surface);
    color: var(--ink);
  }

  .stage-panel {
    grid-template-rows: auto minmax(430px, 62vh) auto;
  }

  .render-stage {
    min-height: 430px;
    padding: 24px 14px;
  }

  .inspector-panel {
    display: block;
    padding: 22px 16px;
  }

  .code-tool {
    margin-top: 24px;
  }

  .quick-path {
    display: block;
    padding: 32px 16px;
  }

  .steps {
    margin: 22px 0;
  }

  .steps li:first-child {
    border-left: 0;
  }

  .site-footer {
    padding: 20px 16px;
  }
}

@media (max-width: 540px) {
  body {
    font-size: 16px;
  }

  .app-header {
    min-height: 58px;
  }

  .header-nav a {
    min-height: 44px;
  }

  .stage-toolbar {
    min-height: 70px;
    padding: 12px 16px;
  }

  .stage-meta span {
    display: none;
  }

  .stage-panel {
    grid-template-rows: auto minmax(390px, 58vh) auto;
  }

  .render-stage {
    min-height: 390px;
  }

  #glassPreview {
    width: 100%;
  }

  .event-console {
    grid-template-columns: 44px 1fr;
    padding: 12px 16px;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .steps li,
  .steps li:first-child {
    min-height: 62px;
    align-content: center;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }
}

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