:root {
  color-scheme: light dark;
  --page: #ffffff;
  --surface: #f5f5f5;
  --surface-strong: #ebebeb;
  --border: #e3e3e3;
  --border-strong: #cdcdcd;
  --text: #1b1b1b;
  --muted: #5f5f5f;
  --accent: #005fb8;
  --accent-hover: #0a6cc7;
  --accent-soft: rgb(0 95 184 / 0.1);
  --on-accent: #ffffff;
  --neutral-tint: rgb(127 127 127 / 0.14);
  --diagram-bar: #e2e2e2;
  --diagram-block: #c9c9c9;
  --diagram-block-text: #2b2b2b;
  --taskbar-photo: #202020;
  --code-keyword: #0b57d0;
  --code-type: #267f99;
  --code-number: #098658;
  --font-text: "Segoe UI Variable Text", "Segoe UI", "Pretendard Variable", Pretendard, "Malgun Gothic", "Apple SD Gothic Neo", system-ui, sans-serif;
  --font-display: "Segoe UI Variable Display", "Segoe UI", "Pretendard Variable", Pretendard, "Malgun Gothic", "Apple SD Gothic Neo", system-ui, sans-serif;
  --font-mono: "Cascadia Code", "Cascadia Mono", Consolas, "SF Mono", Menlo, monospace;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #1b1b1b;
    --surface: #252525;
    --surface-strong: #303030;
    --border: #333333;
    --border-strong: #4a4a4a;
    --text: #f1f1f1;
    --muted: #a8a8a8;
    --accent: #82b8f2;
    --accent-hover: #9ac6f5;
    --accent-soft: rgb(130 184 242 / 0.14);
    --on-accent: #0d1b2a;
    --diagram-bar: #141414;
    --diagram-block: #3b3b3b;
    --diagram-block-text: #e6e6e6;
    --code-keyword: #6cb0f0;
    --code-type: #4ec9b0;
    --code-number: #b5cea8;
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: var(--font-text);
  font-size: 1rem;
  line-height: 1.6;
}

[data-lang="en"] body [lang="ko"],
[data-lang="ko"] body [lang="en"] {
  display: none !important;
}

:lang(ko) {
  word-break: keep-all;
  overflow-wrap: break-word;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent-hover);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

p code,
li code,
td code,
.control-inline code {
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--neutral-tint);
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container {
  width: min(100% - 48px, 1080px);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 16px;
  z-index: 30;
  padding: 8px 14px;
  border-radius: 6px;
  background: var(--accent);
  color: var(--on-accent);
  text-decoration: none;
}

.skip-link:focus {
  top: 12px;
  color: var(--on-accent);
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  background: var(--page);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  min-height: 60px;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

a.wordmark:hover {
  color: var(--text);
}

.site-nav {
  display: flex;
  gap: 24px;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.9375rem;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 6px;
  color: var(--text);
}

.icon-button:hover {
  background: var(--neutral-tint);
  color: var(--text);
}

/* Segmented control */

.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
}

.segmented button {
  padding: 5px 12px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  appearance: none;
}

.segmented button:hover {
  background: var(--neutral-tint);
  color: var(--text);
}

.segmented button[aria-pressed="true"] {
  background: var(--accent-soft);
  color: var(--accent);
}

.segmented-small button {
  padding: 3px 10px;
  font-size: 0.8125rem;
}

.segmented-code button {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

/* Buttons */

.button {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
}

.button:hover {
  background: var(--neutral-tint);
  color: var(--text);
}

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.button-primary:hover {
  border-color: var(--accent-hover);
  background: var(--accent-hover);
  color: var(--on-accent);
}

/* Hero */

.hero {
  padding-top: 96px;
}

.hero h1 {
  max-width: 15em;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 1.4rem + 3.4vw, 3.5rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.lead {
  max-width: 38em;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.1875rem;
}

.install {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  margin-top: 40px;
}

.command {
  display: flex;
  align-items: center;
  gap: 12px;
  width: min(100%, 520px);
  padding: 6px 6px 6px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.command code {
  flex: 1;
  min-width: 0;
  font-size: 0.9375rem;
  overflow-wrap: anywhere;
}

.copy-button {
  flex: none;
  padding: 5px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 5px;
  background: var(--page);
  color: var(--text);
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  appearance: none;
}

.copy-button:hover {
  background: var(--surface-strong);
}

.copy-button .copy-done {
  display: none;
}

.copy-button[data-state="copied"] .copy-idle {
  display: none;
}

.copy-button[data-state="copied"] .copy-done {
  display: inline;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* Crop window and marker positions are in source pixels of the 2880 x 96 screenshot. */
.taskbar-shot {
  --source-width: 2880;
  --crop-start: 700;
  --crop-width: 1266;
  --marker-start: 892;
  --marker-end: 1757;
  --marker-offset: calc((var(--marker-start) - var(--crop-start)) / var(--crop-width) * 100%);
  margin: 72px 0 0;
}

.taskbar-shot-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: var(--crop-width) / 96;
  border-radius: 10px;
  outline: 1px solid var(--border);
  background: var(--taskbar-photo);
}

.taskbar-shot-frame img {
  position: absolute;
  top: 0;
  left: calc(var(--crop-start) / var(--crop-width) * -100%);
  width: calc(var(--source-width) / var(--crop-width) * 100%);
  max-width: none;
  height: 100%;
}

.taskbar-shot-marker {
  width: calc((var(--marker-end) - var(--marker-start)) / var(--crop-width) * 100%);
  height: 8px;
  margin: 10px 0 0 var(--marker-offset);
  border: 1px solid var(--accent);
  border-top: 0;
}

.taskbar-shot figcaption {
  margin: 8px 0 0 var(--marker-offset);
  color: var(--muted);
  font-size: 0.875rem;
}

/* Sections */

.section {
  padding: 96px 0;
  border-top: 1px solid var(--border);
}

.hero + .section {
  border-top: 0;
}

.section h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.3rem + 1.6vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.section h3 {
  margin: 56px 0 12px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
}

.section p {
  max-width: 44em;
}

.section-intro {
  margin: 0 0 32px;
}

.note {
  margin-top: 32px;
  color: var(--muted);
}

/* Code */

.code-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.code {
  width: 100%;
  margin: 0;
  padding: 20px 24px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  tab-size: 4;
}

.code code {
  font-size: inherit;
}

.code .k {
  color: var(--code-keyword);
}

.code .t {
  color: var(--code-type);
}

.code .n {
  color: var(--code-number);
}

/* Tables */

.table-wrap {
  margin-top: 32px;
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 0.9375rem;
  line-height: 1.55;
}

th {
  padding: 0 24px 10px 0;
  border-bottom: 1px solid var(--border-strong);
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}

td {
  padding: 14px 24px 14px 0;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th:last-child,
td:last-child {
  padding-right: 0;
}

td:first-child code,
.options-table td:nth-child(2) code {
  white-space: nowrap;
}

.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.requirements {
  margin: 32px 0 0;
  padding-left: 1.25em;
}

.requirements li + li {
  margin-top: 6px;
}

/* Interactive diagrams */

.demo {
  padding: 28px;
  border-radius: 12px;
  background: var(--surface);
}

.demo-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 20px 40px;
  margin-bottom: 28px;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label {
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 600;
}

.control-inline {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  padding-bottom: 6px;
  cursor: pointer;
}

.range-row {
  display: flex;
  align-items: center;
  gap: 14px;
}

.range-row input {
  width: 260px;
  margin: 0;
  accent-color: var(--accent);
}

.range-row output {
  min-width: 4.5em;
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--accent);
}

.diagram-scroll {
  overflow-x: auto;
  scrollbar-width: thin;
}

.taskbar-diagram {
  min-width: 720px;
}

.diagram-bar {
  position: relative;
  height: 56px;
  border-radius: 8px;
  background: var(--diagram-bar);
}

.diagram-block {
  position: absolute;
  top: 10px;
  bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
  overflow: hidden;
  border-radius: 5px;
  background: var(--diagram-block);
  color: var(--diagram-block-text);
  font-size: 0.75rem;
  white-space: nowrap;
  transition: left 360ms var(--ease-out), width 360ms var(--ease-out);
}

.diagram-block[hidden],
.measure[hidden] {
  display: none;
}

.diagram-content {
  z-index: 1;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
}

.diagram-slot {
  box-shadow: inset 0 0 0 1px var(--diagram-bar);
}

.diagram-stretch {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
  box-shadow: inset 0 0 0 1px var(--diagram-bar), inset 0 0 0 2px var(--accent);
}

.diagram-slot.is-empty {
  visibility: hidden;
}

.diagram-area {
  position: absolute;
  top: 4px;
  bottom: 4px;
  border: 1px dashed var(--accent);
  border-radius: 6px;
  pointer-events: none;
  transition: left 360ms var(--ease-out), width 360ms var(--ease-out);
}

.diagram-measures {
  position: relative;
  height: 36px;
  margin-top: 10px;
}

.measure {
  position: absolute;
  top: 0;
  height: 8px;
  border: 1px solid var(--border-strong);
  border-top: 0;
  transition: left 360ms var(--ease-out), width 360ms var(--ease-out);
}

.measure span {
  position: absolute;
  top: 12px;
  left: 50%;
  color: var(--muted);
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  transform: translateX(-50%);
}

.measure.is-selected {
  border-color: var(--accent);
}

.measure.is-selected span {
  color: var(--accent);
  font-weight: 600;
}

.demo-caption {
  min-height: 3.2em;
  margin: 20px 0 0;
}

.demo .table-wrap {
  margin-top: 16px;
}

.demo-footnote {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.875rem;
}

/* Footer */

.site-footer {
  padding: 48px 0 64px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9375rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 32px;
}

.footer-text {
  max-width: 40em;
}

.footer-text p {
  margin: 0 0 8px;
}

.footer-text .wordmark {
  margin-bottom: 12px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* Responsive */

@media (max-width: 900px) {
  .site-nav {
    display: none;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 40px, 1080px);
  }

  .hero {
    padding-top: 56px;
  }

  .lead {
    font-size: 1.0625rem;
  }

  .taskbar-shot {
    --crop-start: 780;
    --crop-width: 482;
    --marker-end: 1262;
    margin-top: 48px;
  }

  .section {
    padding: 64px 0;
  }

  .demo {
    padding: 20px 16px;
  }

  .range-row,
  .range-row input {
    width: 100%;
  }

  .demo-controls .control:first-child {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .diagram-block,
  .diagram-area,
  .measure {
    transition: none;
  }
}