/* 폰꾸 공개 사이트(소개·사례·글꼴·문서) 디자인 시스템.
 *
 * 흰 종이 위의 먹색 글자, 오방색(적·청·황·녹)을 강조색으로 쓰고, 원고지 칸과 도장을
 * 모티프로 둔다. 큰 제목과 강조 문구는 폰꾸로 그린다 — 제목은 꾸밈 클래스
 * `<h2 class="font-kku k-h2" data-font="sebul" data-size="…">`로 쓰고, 한 낱말을 돋보이게
 * 할 때는 `.k-mark`(초성을 적색으로)를 붙인다. 개발 도구 페이지는 demo.css를 쓴다. */

:root {
  --k-paper: #ffffff;
  --k-paper-2: #faf8f4;
  --k-ink: #141414;
  --k-ink-2: #3a3a3a;
  --k-muted: #6b6864;
  --k-line: #ebe6dd;
  --k-red: #d62839;   /* 적 — 도장 */
  --k-blue: #1f4fd1;  /* 청 */
  --k-yellow: #f2b705;/* 황 */
  --k-green: #12965f; /* 녹 */
  --k-grid: rgba(214, 40, 57, 0.16); /* 원고지 줄 */
  --k-code-bg: #17161c;
  --k-code-ink: #f1ede4;
  --k-code-muted: #a8a39a;
  --k-radius: 14px;
  --k-radius-sm: 8px;
  --k-max: 1180px;
  --k-gutter: 24px;
  --k-sans: system-ui, -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  --k-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace;
  --k-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* hidden 속성은 컴포넌트의 display 규칙(.k-mock-font 등)보다 이긴다. */
[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--k-paper);
  color: var(--k-ink);
  font: 16px/1.7 var(--k-sans);
  -webkit-font-smoothing: antialiased;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

a {
  color: var(--k-blue);
  text-underline-offset: 0.2em;
}

code {
  padding: 0.08em 0.38em;
  border-radius: 5px;
  background: #f3f0ea;
  color: #8a1f2b;
  font-family: var(--k-mono);
  font-size: 0.86em;
}

.k-wrap {
  max-width: var(--k-max);
  margin: 0 auto;
  padding-inline: var(--k-gutter);
}

/* 폰꾸로 그린 바탕 요소는 줄 안에서 자기 상자를 갖는다 */
.k-h1,
.k-h2,
.k-h3 {
  display: block;
  margin: 0;
  color: var(--k-ink);
  line-height: 1.15;
}

/* 한 낱말 강조: 초성(와 완성형 head)을 적색으로 — 자소 단위로 칠하는 폰꾸만의 강조 */
.k-mark :is([part~="choseong"], [part~="head"]) {
  color: var(--k-red);
}

/* ── 머리 ─────────────────────────────────────────────── */
.k-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--k-line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(1.4) blur(10px);
}

.k-header-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-block-size: 64px;
}

.k-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--k-ink);
  text-decoration: none;
}

.k-stamp {
  display: inline-grid;
  place-items: center;
  inline-size: 34px;
  block-size: 34px;
  border-radius: 7px;
  background: var(--k-red);
  color: #fff;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35);
  transform: rotate(-4deg);
}

.k-brand-name {
  display: grid;
  line-height: 1.15;
}

.k-brand-name strong {
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}

.k-brand-name span {
  color: var(--k-muted);
  font-family: var(--k-mono);
  font-size: 0.7rem;
}

.k-nav {
  display: flex;
  flex: 1;
  justify-content: flex-end;
  gap: 0.25rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.k-nav::-webkit-scrollbar {
  display: none;
}

.k-nav a {
  position: relative;
  flex: none;
  padding: 0.45rem 0.8rem;
  color: var(--k-ink-2);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.k-nav a:hover {
  color: var(--k-ink);
}

/* 지금 페이지: 붓으로 그은 듯한 적색 밑줄 */
.k-nav a[aria-current="page"] {
  color: var(--k-ink);
}

.k-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  inset-inline: 0.65rem;
  inset-block-end: 0.15rem;
  block-size: 3px;
  border-radius: 3px;
  background: var(--k-red);
  transform: rotate(-1deg);
}

.k-nav a[data-demo-category="Create"] {
  margin-inline-start: 0.4rem;
  border: 1px solid var(--k-ink);
  border-radius: 999px;
}

.k-nav a[data-demo-category="Create"][aria-current="page"]::after {
  display: none;
}

/* ── 공통 부품 ────────────────────────────────────────── */
.k-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-block-size: 2.9rem;
  padding: 0.7rem 1.35rem;
  border: 1.5px solid var(--k-ink);
  border-radius: 999px;
  background: var(--k-paper);
  color: var(--k-ink);
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms var(--k-ease), background-color 160ms var(--k-ease);
}

.k-btn:hover {
  transform: translateY(-2px);
}

.k-btn--primary {
  background: var(--k-ink);
  color: #fff;
}

.k-btn--red {
  border-color: var(--k-red);
  background: var(--k-red);
  color: #fff;
}

.k-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.k-chips button,
.k-chip {
  min-block-size: 2.2rem;
  padding: 0.3rem 0.9rem;
  border: 1px solid var(--k-line);
  border-radius: 999px;
  background: var(--k-paper);
  color: var(--k-ink-2);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 650;
  cursor: pointer;
}

.k-chips button[aria-pressed="true"],
.k-chips button[aria-selected="true"] {
  border-color: var(--k-ink);
  background: var(--k-ink);
  color: #fff;
}

.k-input {
  min-block-size: 2.7rem;
  padding: 0 1rem;
  border: 1.5px solid var(--k-ink);
  border-radius: 999px;
  background: var(--k-paper);
  color: var(--k-ink);
  font: inherit;
}

.k-input:focus-visible,
.k-btn:focus-visible,
.k-chips button:focus-visible {
  outline: 3px solid var(--k-yellow);
  outline-offset: 2px;
}

.k-note {
  margin: 0;
  color: var(--k-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.k-lead {
  max-width: 62ch;
  margin: 0;
  color: var(--k-ink-2);
  font-size: 1.08rem;
  line-height: 1.8;
}

.k-card {
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  background: var(--k-paper);
}

/* 견본 바탕 — 글꼴이 요구하는 바탕(네온·분필은 어두운 바탕, 스티커는 색 바탕) */
[data-tone="dark"] { --k-tone: #12121c; }
[data-tone="pink"] { --k-tone: #ffd6e5; }
[data-tone="paper"] { --k-tone: #f7f0e1; }
[data-tone="board"] { --k-tone: #24392f; }
[data-tone="blueprint"] { --k-tone: #0f3d7a; }
[data-tone="linen"] { --k-tone: #efe6d4; }

/* 도면은 옅은 격자, 리넨은 씨실·날실 결을 바탕에 깐다 */
[data-tone="blueprint"]:is(.k-stage, .k-specimen-stage),
[data-tone="blueprint"] > .k-stage {
  background-image:
    linear-gradient(rgb(255 255 255 / 13%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 13%) 1px, transparent 1px),
    linear-gradient(rgb(255 255 255 / 6%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 6%) 1px, transparent 1px);
  background-size: 48px 48px, 48px 48px, 12px 12px, 12px 12px;
  background-position: -1px -1px;
}

[data-tone="linen"]:is(.k-stage, .k-specimen-stage),
[data-tone="linen"] > .k-stage {
  background-image:
    repeating-linear-gradient(0deg, rgb(120 92 52 / 7%) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgb(120 92 52 / 6%) 0 1px, transparent 1px 4px);
}

/* 어두운 바탕에서 색을 정하지 않는 글꼴(세벌·고딕)은 밝은 먹으로 */
[data-tone="dark"]:is(.k-stage, .k-specimen-stage),
[data-tone="dark"] > .k-stage,
[data-tone="board"]:is(.k-stage, .k-specimen-stage),
[data-tone="board"] > .k-stage,
[data-tone="blueprint"]:is(.k-stage, .k-specimen-stage),
[data-tone="blueprint"] > .k-stage {
  color: #f4f1ea;
}

/* 원고지: 칸과 붉은 줄 */
.k-manuscript {
  background-color: var(--k-paper);
  background-image:
    linear-gradient(var(--k-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--k-grid) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: -1px -1px;
}

/* ── 코드 상자 ────────────────────────────────────────── */
.k-code {
  min-inline-size: 0;
  overflow: hidden;
  border-radius: var(--k-radius);
  background: var(--k-code-bg);
  color: var(--k-code-ink);
}

.k-code-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.5rem 0.6rem 0.5rem 1rem;
  border-bottom: 1px solid rgba(241, 237, 228, 0.1);
  color: var(--k-code-muted);
  font-size: 0.8rem;
}

.k-code-bar button,
.k-copy {
  padding: 0.25rem 0.8rem;
  border: 1px solid rgba(241, 237, 228, 0.28);
  border-radius: 999px;
  background: transparent;
  color: var(--k-code-ink);
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
}

.k-code pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--k-mono);
  font-size: 0.86rem;
  line-height: 1.7;
  white-space: pre;
}

.k-code pre code {
  padding: 0;
  border-radius: 0;
  background: none;
  color: inherit;
  font-size: inherit;
}

.k-code--wrap pre {
  white-space: pre-wrap;
  word-break: break-all;
}

/* ── 구획 ─────────────────────────────────────────────── */
.k-section {
  padding-block: clamp(4rem, 9vw, 7rem);
  scroll-margin-top: 64px;
}

.k-section + .k-section {
  border-top: 1px solid var(--k-line);
}

.k-section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.4rem 1.5rem;
  align-items: start;
  margin-bottom: 2.5rem;
}

/* 구획 번호: 원고지 칸 안의 한글 수사 */
.k-num {
  grid-row: span 3;
  display: inline-grid;
  place-items: center;
  min-inline-size: 3.4rem;
  min-block-size: 3.4rem;
  padding: 0.3rem;
  border: 1.5px solid var(--k-red);
  color: var(--k-red);
  font-size: 0.95rem;
  font-weight: 800;
  writing-mode: vertical-rl;
  letter-spacing: 0.15em;
  background-image:
    linear-gradient(var(--k-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--k-grid) 1px, transparent 1px);
  background-size: 50% 50%;
}

.k-kicker {
  color: var(--k-red);
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.k-section-head .k-lead {
  margin-top: 0.75rem;
}

/* ── 레이아웃 격자 ────────────────────────────────────── */
.k-split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.k-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--k-col, 250px), 1fr));
  gap: 1.25rem;
}

.k-stack {
  display: grid;
  gap: 1rem;
  min-inline-size: 0;
}

/* 번호 단계 */
.k-steps {
  display: grid;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: k-step;
}

.k-steps li {
  position: relative;
  padding-inline-start: 2.6rem;
  color: var(--k-ink-2);
  line-height: 1.65;
  counter-increment: k-step;
}

.k-steps li::before {
  content: counter(k-step);
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0;
  display: grid;
  place-items: center;
  inline-size: 1.85rem;
  block-size: 1.85rem;
  border: 1.5px solid var(--k-red);
  color: var(--k-red);
  font-weight: 800;
  font-size: 0.85rem;
}

.k-steps strong {
  display: block;
  color: var(--k-ink);
}

/* 견본 무대 */
.k-stage {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 1rem;
  min-block-size: 7rem;
  padding: 1.25rem;
  overflow: hidden;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  background: var(--k-tone, var(--k-paper));
  transition: background-color 220ms var(--k-ease);
}

[data-tone] > .k-stage,
.k-stage[data-tone] {
  border-color: transparent;
}

/* 브라우저 틀 */
.k-browser {
  overflow: hidden;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  background: var(--k-paper);
  box-shadow: 0 18px 40px rgba(20, 20, 20, 0.08);
}

.k-browser-bar {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--k-line);
  background: var(--k-paper-2);
}

.k-browser-bar > span {
  inline-size: 0.62rem;
  block-size: 0.62rem;
  border-radius: 50%;
  background: #dcd6cc;
}

.k-browser-bar em {
  margin-inline-start: 0.6rem;
  overflow: hidden;
  color: var(--k-muted);
  font-family: var(--k-mono);
  font-size: 0.76rem;
  font-style: normal;
  white-space: nowrap;
  text-overflow: ellipsis;
}

/* 터미널 */
.k-terminal {
  min-inline-size: 0;
  overflow: hidden;
  border-radius: var(--k-radius);
  background: #0f1117;
  color: #e7e5e0;
}

.k-terminal-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid rgba(231, 229, 224, 0.12);
  font-size: 0.82rem;
}

.k-terminal-bar input[type="text"] {
  flex: 1 1 10rem;
  min-block-size: 2.2rem;
  padding: 0 0.8rem;
  border: 1px solid rgba(231, 229, 224, 0.28);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: inherit;
  font: inherit;
  font-size: 0.98rem;
}

.k-terminal-bar label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: rgba(231, 229, 224, 0.75);
}

.k-terminal-bar button {
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(231, 229, 224, 0.3);
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
}

.k-terminal pre {
  min-block-size: 8rem;
  margin: 0;
  padding: 1.3rem 1.1rem;
  overflow-x: auto;
  font-family: var(--k-mono);
  font-size: 1.4rem;
  line-height: 1.45;
  white-space: pre;
}

/* ── 문서 ─────────────────────────────────────────────── */
.k-docs {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 3rem;
  padding-block: 2.5rem 6rem;
}

.k-docs-nav {
  position: sticky;
  top: 88px;
  align-self: start;
  max-block-size: calc(100vh - 110px);
  overflow-y: auto;
  font-size: 0.92rem;
}

.k-docs-nav summary {
  display: none;
}

.k-docs-nav ol,
.k-docs-nav ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.k-docs-nav li {
  margin: 0;
}

.k-docs-nav a {
  display: block;
  padding: 0.3rem 0.75rem;
  border-inline-start: 2px solid var(--k-line);
  color: var(--k-ink-2);
  text-decoration: none;
}

.k-docs-nav a:hover {
  color: var(--k-ink);
}

.k-docs-nav a[aria-current="true"] {
  border-inline-start-color: var(--k-red);
  color: var(--k-ink);
  font-weight: 700;
}

.k-docs-nav .k-docs-group {
  margin: 1.1rem 0 0.35rem;
  color: var(--k-muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.k-prose {
  min-inline-size: 0;
  max-width: 78ch;
}

.k-prose > section {
  padding-block: 0 3.5rem;
  scroll-margin-top: 84px;
}

.k-prose h2.k-h2 {
  margin-bottom: 1rem;
}

.k-prose h3 {
  margin: 2rem 0 0.6rem;
  font-size: 1.15rem;
  line-height: 1.4;
  scroll-margin-top: 84px;
}

.k-prose p,
.k-prose li {
  color: var(--k-ink-2);
}

.k-prose p {
  margin: 0 0 1rem;
}

.k-prose ul,
.k-prose ol {
  margin: 0 0 1rem;
  padding-inline-start: 1.3rem;
}

.k-prose .k-code,
.k-prose .k-stage {
  margin: 0 0 1.25rem;
}

.k-table {
  inline-size: 100%;
  margin: 0 0 1.25rem;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.k-table-scroll {
  margin: 0 0 1.25rem;
  overflow-x: auto;
}

.k-table-scroll .k-table {
  margin: 0;
}

.k-table th,
.k-table td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--k-line);
  text-align: start;
  vertical-align: top;
}

.k-table th {
  border-bottom: 1.5px solid var(--k-ink);
  font-size: 0.82rem;
  white-space: nowrap;
}

.k-callout {
  margin: 0 0 1.25rem;
  padding: 0.9rem 1.1rem;
  border-inline-start: 3px solid var(--k-yellow);
  border-radius: 0 var(--k-radius-sm) var(--k-radius-sm) 0;
  background: #fffaeb;
  color: var(--k-ink-2);
  font-size: 0.94rem;
}

/* ── 소개 페이지 ──────────────────────────────────────── */
/* 제목은 전체 폭, 그 아래 왼쪽에 설명·버튼, 오른쪽에 견본 */
.k-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  grid-template-rows: auto auto auto auto 1fr;
  grid-template-areas:
    "eyebrow eyebrow"
    "title title"
    "lead spec"
    "actions spec"
    ". spec";
  gap: 1.5rem 3rem;
  align-items: start;
  padding-block: clamp(3rem, 7vw, 6rem) clamp(2.5rem, 5vw, 4rem);
  padding-inline-end: calc(var(--k-gutter) + 2.5rem);
}

.k-hero-copy {
  display: contents;
}

.k-hero .k-eyebrow { grid-area: eyebrow; }
.k-hero .k-hero-title { grid-area: title; margin-block-end: 0.5rem; }
.k-hero-copy > .k-lead { grid-area: lead; }
.k-hero .k-hero-actions { grid-area: actions; }
.k-hero .k-specimen { grid-area: spec; }

.k-eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0;
  font-size: 0.85rem;
  font-weight: 800;
}

/* 원고지 칸에 적은 듯한 머리글 */
.k-eyebrow span {
  padding: 0.2rem 0.6rem;
  border: 1.5px solid var(--k-red);
  color: var(--k-red);
}

.k-eyebrow span + span {
  border-inline-start: 0;
}

.k-eyebrow .k-eyebrow-to {
  background: var(--k-red);
  color: #fff;
}

.k-hero-title {
  display: grid;
  margin: 0;
}

/* 지금 보이는 제목과, 높이만 잡아 두는 숨은 문장들이 한 칸에 겹친다 */
.k-hero-title > * {
  grid-area: 1 / 1;
  display: grid;
  gap: 0.15em;
  align-content: start;
}

.k-hero-ghost {
  visibility: hidden;
  pointer-events: none;
}

/* 제목을 바꿔 쓰는 줄 끝의 커서 — 세벌 글꼴 잉크가 글자 칸 위쪽으로 올라 있어 높이를 거기 맞춘다 */
.k-hero-title .k-caret [part="line"]:last-of-type::after {
  content: "";
  display: inline-block;
  inline-size: 0.06em;
  block-size: 0.94em;
  margin-block-start: -0.14em;
  margin-inline-start: 0.08em;
  vertical-align: top;
  background: var(--k-red);
  animation: k-caret 1.1s steps(1, end) infinite;
}

.k-hero-ghost .k-caret [part="line"]:last-of-type::after {
  animation: none;
}

@keyframes k-caret {
  50% { opacity: 0; }
}

.k-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.k-specimen {
  display: grid;
  gap: 1rem;
  min-inline-size: 0;
}

.k-specimen-stage {
  display: flex;
  align-items: center;
  justify-content: center;
  min-block-size: clamp(12rem, 26vw, 17rem);
  padding: 1.5rem;
  overflow: hidden;
  border: 1.5px solid var(--k-ink);
  border-radius: 4px;
  background-color: var(--k-tone, var(--k-paper));
  box-shadow: 8px 8px 0 var(--k-ink);
  transition: background-color 220ms var(--k-ease);
}

.k-specimen-stage[data-tone] {
  background-image: none;
}

.k-specimen-try {
  display: grid;
  gap: 0.7rem;
}

.k-specimen-try .k-input {
  inline-size: 100%;
}

/* 자모 칸: 음절과 초성(적)·중성(청)·종성(녹) */
.k-split-jamo {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  min-block-size: 2.4rem;
}

.k-jamo-group {
  display: inline-flex;
  border: 1.5px solid var(--k-ink);
}

.k-jamo-group > * {
  display: grid;
  place-items: center;
  inline-size: 2.1rem;
  block-size: 2.1rem;
  font-style: normal;
  font-weight: 700;
}

.k-jamo-group b {
  background: var(--k-ink);
  color: #fff;
}

.k-jamo-group i + i {
  border-inline-start: 1px dashed var(--k-line);
}

.k-jamo-cho { color: var(--k-red); }
.k-jamo-jung { color: var(--k-blue); }
.k-jamo-jong { color: var(--k-green); }

/* 세로쓰기 장식 — 요소 자신이 세로쓰기라 논리 속성의 방향이 바뀐다. 물리 속성으로 둔다. */
.k-hero-vertical {
  position: absolute;
  right: var(--k-gutter);
  top: clamp(3rem, 7vw, 6rem);
  color: var(--k-red);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.35em;
  writing-mode: vertical-rl;
  opacity: 0.75;
}

.k-uses {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-block-end: 1rem;
  border-block: 1.5px solid var(--k-ink);
}

.k-use {
  display: grid;
  align-content: start;
  gap: 0.35rem;
  padding: 1.4rem 1.25rem;
  color: var(--k-ink);
  text-decoration: none;
  transition: background-color 160ms var(--k-ease);
}

.k-use + .k-use {
  border-inline-start: 1px solid var(--k-line);
}

.k-use:hover {
  background: var(--k-paper-2);
}

.k-use-num {
  color: var(--k-red);
  font-size: 0.82rem;
  font-weight: 800;
}

.k-use strong {
  font-size: 1.12rem;
}

.k-use span:last-child {
  color: var(--k-muted);
  font-size: 0.92rem;
}

.k-section--tint {
  background: var(--k-paper-2);
}

.k-tabs {
  margin-bottom: 1.25rem;
}

.k-after {
  margin-top: 1.5rem;
}

.k-inline-btn {
  padding: 0.05rem 0.55rem;
  border: 1px solid var(--k-blue);
  border-radius: 999px;
  background: #eef2ff;
  color: var(--k-blue);
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}

.k-figure {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  min-inline-size: 0;
}

.k-mock-banner {
  display: flex;
  justify-content: center;
  padding: 2.2rem 1rem;
  overflow: hidden;
  background: #12121c;
}

.k-mock-body {
  display: grid;
  justify-items: center;
  gap: 1rem;
  padding: 1.5rem 1.25rem 1.75rem;
  background: #fff7ed;
  text-align: center;
}

.k-mock-body p {
  margin: 0;
  color: #374151;
}

.k-mock-deal {
  padding: 0.6rem 1.1rem;
  border-radius: 14px;
  background: #ffd6e5;
}

.k-mock-font {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
}

.k-mock-compare {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem 1rem;
}

.k-mock-compare > span {
  color: var(--k-muted);
  font-size: 0.82rem;
}

.k-mock-css {
  margin: 0;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  border-radius: var(--k-radius-sm);
  background: var(--k-code-bg);
  color: var(--k-code-ink);
  font-family: var(--k-mono);
  font-size: 0.74rem;
  line-height: 1.6;
}

/* 예시 꾸밈 글꼴 — AI 설명서 §5의 kku-berry */
.kku-berry { --fy-weight: 800; }
.kku-berry :is([part~="choseong"], [part~="head"]) { color: #c2185b; }
.kku-berry [part~="jungseong"] { color: #7b1fa2; }
.kku-berry [part~="jongseong"] { color: #f06292; }
.kku-berry [part~="jamo"] { text-shadow: 0.04em 0.04em 0 #ffd1e3; }

/* 사례 썸네일 — 실제 템플릿을 줄여 보인다 */
.k-cases {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.k-case {
  display: grid;
  gap: 0.4rem;
  color: var(--k-ink);
  text-decoration: none;
}

.k-case-frame {
  position: relative;
  display: block;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  margin-bottom: 0.5rem;
  border: 1.5px solid var(--k-ink);
  border-radius: 4px;
  background: var(--k-paper);
  box-shadow: 6px 6px 0 var(--k-ink);
  transition: transform 160ms var(--k-ease), box-shadow 160ms var(--k-ease);
}

.k-case:hover .k-case-frame {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 var(--k-red);
}

.k-case-frame iframe {
  position: absolute;
  inset: 0;
  inline-size: 400%;
  block-size: 400%;
  border: 0;
  transform: scale(0.25);
  transform-origin: 0 0;
  pointer-events: none;
}

.k-case strong {
  font-size: 1.05rem;
}

.k-case > span:last-child {
  color: var(--k-muted);
  font-size: 0.9rem;
}

/* 글꼴 띠 */
.k-fontstrip {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  border-block-start: 1.5px solid var(--k-ink);
  border-inline-start: 1px solid var(--k-line);
}

.k-fontstrip a {
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 0.6rem;
  min-block-size: 9rem;
  padding: 1rem 0.5rem;
  overflow: hidden;
  border-inline-end: 1px solid var(--k-line);
  border-block-end: 1px solid var(--k-line);
  background: var(--k-tone, var(--k-paper));
  color: var(--k-ink);
  text-decoration: none;
}

.k-fontstrip a code {
  background: rgba(255, 255, 255, 0.85);
}

/* 소개의 '고르고 섞는 얼굴' — 글꼴·꾸밈·움직임 세 축 맛보기(site/landing-mix.js)와 테마 띠 */
.k-mix {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 1rem 1.5rem;
  align-items: stretch;
  margin-block-end: 1.5rem;
}

.k-mix-stage {
  min-block-size: 12rem;
}

.k-mix-controls {
  display: grid;
  gap: 0.7rem;
  align-content: start;
}

.k-mix-row {
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr);
  gap: 0.6rem;
  align-items: baseline;
}

.k-mix-label {
  font-size: 0.85rem;
  font-weight: 750;
  color: var(--k-ink-2);
}

.k-mix-code {
  margin: 0.2rem 0 0;
  padding: 0.7rem 0.9rem;
  overflow-x: auto;
  border-radius: var(--k-radius-sm);
  background: var(--k-ink);
  color: #f4f1ea;
  font-size: 0.78rem;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.k-themestrip a {
  text-align: center;
}

.k-themestrip font-kku {
  max-inline-size: 100%;
}

/* 소개의 효과 맛보기 — 효과 페이지의 카드로 잇는 타일 */
.k-fxgrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.k-fxtile {
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: 0.4rem;
  padding: 0.9rem 0.9rem 1.1rem;
  border: 1.5px solid var(--k-ink);
  border-radius: var(--k-radius-sm);
  background: var(--k-paper);
  color: var(--k-ink);
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.k-fxtile:hover,
.k-fxtile:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--k-ink);
}

.k-fxtile-stage {
  display: grid;
  place-items: center;
  min-block-size: 6.5rem;
  margin-block-end: 0.4rem;
  overflow: hidden;
  border-radius: calc(var(--k-radius-sm) - 2px);
  background: var(--k-tone, var(--k-paper-2, #f6f4ef));
}

.k-fxtile strong {
  font-size: 1.05rem;
}

.k-fxtile > span:last-child {
  color: var(--k-ink-2);
  font-size: 0.92rem;
  line-height: 1.55;
}

.k-why {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.k-why article {
  display: grid;
  align-content: start;
  gap: 0.45rem;
  padding-top: 1.1rem;
  border-top: 2px solid var(--k-ink);
}

.k-why-figure {
  display: flex;
  align-items: baseline;
  gap: 0.15rem;
  min-block-size: 3.6rem;
  color: var(--k-red);
  font-size: 2.6rem;
  font-weight: 850;
  line-height: 1;
  letter-spacing: -0.03em;
}

.k-why-figure small {
  font-size: 1rem;
  font-weight: 800;
}

.k-why h3 {
  margin: 0;
  font-size: 1.05rem;
}

.k-why p {
  margin: 0;
  color: var(--k-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.k-make {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.k-make-card {
  display: grid;
  gap: 0.75rem;
  padding: 1.75rem;
  border: 1.5px solid var(--k-ink);
  border-radius: 4px;
  background: var(--k-paper);
  color: var(--k-ink);
  text-decoration: none;
  transition: transform 160ms var(--k-ease), box-shadow 160ms var(--k-ease);
}

.k-make-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--k-red);
}

.k-make-card--grid {
  background-image:
    linear-gradient(var(--k-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--k-grid) 1px, transparent 1px);
  background-size: 28px 28px;
}

.k-make-card > span {
  color: var(--k-muted);
}

/* ── 글꼴·사례 페이지 ─────────────────────────────────── */
.k-page-head {
  display: grid;
  gap: 1.25rem;
  padding-block: clamp(3rem, 6vw, 5rem) 2rem;
}

.k-btn--small {
  min-block-size: 2.1rem;
  padding: 0.3rem 0.75rem;
  border-width: 1.2px;
  font-size: 0.82rem;
}

.k-tester {
  position: sticky;
  top: 64px;
  z-index: 10;
  border-block: 1.5px solid var(--k-ink);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
}

.k-tester-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding-block: 0.8rem;
}

.k-tester .k-input {
  flex: 1 1 14rem;
  max-inline-size: 22rem;
}

.k-tester-size {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 650;
}

.k-tester-size input {
  accent-color: var(--k-red);
}

.k-tester-size output {
  min-inline-size: 3.2rem;
  color: var(--k-muted);
  font-family: var(--k-mono);
  font-size: 0.82rem;
}

.k-font-group {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem;
  margin: 3.5rem 0 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1.5px solid var(--k-ink);
  font-size: 1.3rem;
}

.k-font-group span {
  color: var(--k-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.k-fontlist {
  display: grid;
}

.k-fontrow {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: 1.5rem;
  align-items: center;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--k-line);
  scroll-margin-top: 140px;
}

.k-fontrow:target .k-fontrow-meta h3 {
  color: var(--k-red);
}

.k-fontrow-meta {
  display: grid;
  gap: 0.5rem;
  align-content: start;
}

.k-fontrow-meta h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin: 0;
  font-size: 1.2rem;
}

.k-fontrow-meta p {
  margin: 0;
  color: var(--k-ink-2);
  font-size: 0.92rem;
}

.k-fontrow-meta .k-btn {
  justify-self: start;
}

.k-fontrow-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.k-fontrow-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.k-fontrow-tags li {
  padding: 0.1rem 0.55rem;
  border: 1px solid var(--k-line);
  border-radius: 999px;
  color: var(--k-muted);
  font-size: 0.78rem;
}

.k-fontrow-tags a {
  text-decoration: none;
}

.k-fontrow-stage {
  min-block-size: 8rem;
}

.k-font-more {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-block: 4rem 5rem;
  padding: 1.75rem;
  border: 1.5px solid var(--k-ink);
  border-radius: 4px;
  background-image:
    linear-gradient(var(--k-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--k-grid) 1px, transparent 1px);
  background-size: 28px 28px;
}

.k-font-more > div:first-child {
  display: grid;
  gap: 0.5rem;
  max-inline-size: 40rem;
}

.k-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 2.5rem 2rem;
  padding-block: 1rem 5rem;
}

.k-showcase-card {
  display: grid;
  align-content: start;
  gap: 1rem;
  min-inline-size: 0;
}

.k-showcase-card .k-case-frame {
  margin: 0;
}

.k-showcase-body {
  display: grid;
  gap: 0.55rem;
}

.k-showcase-body h2 {
  margin: 0;
  font-size: 1.25rem;
}

.k-showcase-body p {
  margin: 0;
  color: var(--k-ink-2);
  font-size: 0.93rem;
}

.k-showcase-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.3rem;
}

.k-h3 {
  display: block;
  margin: 0;
  line-height: 1.2;
}

/* ── 꼬리 ─────────────────────────────────────────────── */
.k-footer {
  border-top: 1px solid var(--k-line);
  background: var(--k-paper-2);
}

.k-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 2rem;
  color: var(--k-muted);
  font-size: 0.9rem;
}

.k-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.k-footer a {
  color: var(--k-ink-2);
}

/* ── 좁은 화면 ────────────────────────────────────────── */
@media (max-width: 960px) {
  .k-mix {
    grid-template-columns: minmax(0, 1fr);
  }

  .k-split,
  .k-hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .k-hero {
    grid-template-rows: none;
    grid-template-areas: "eyebrow" "title" "lead" "actions" "spec";
    padding-inline-end: var(--k-gutter);
  }

  .k-hero-vertical {
    display: none;
  }

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

  .k-fontstrip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .k-docs {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.5rem;
  }

  .k-docs-nav {
    position: static;
    max-block-size: none;
    border: 1px solid var(--k-line);
    border-radius: var(--k-radius-sm);
  }

  .k-docs-nav summary {
    display: block;
    padding: 0.75rem 1rem;
    font-weight: 700;
    cursor: pointer;
  }

  .k-docs-nav > div {
    padding: 0 0.5rem 0.75rem;
  }
}

@media (max-width: 720px) {
  :root {
    --k-gutter: 16px;
  }

  .k-header-inner {
    flex-wrap: wrap;
    gap: 0.25rem;
    padding-block: 0.5rem;
  }

  .k-nav {
    flex-basis: 100%;
    justify-content: flex-start;
  }

  .k-section-head {
    grid-template-columns: minmax(0, 1fr);
  }

  .k-num {
    grid-row: auto;
    writing-mode: horizontal-tb;
    justify-self: start;
    min-block-size: 2.4rem;
  }

  .k-terminal pre {
    font-size: 1.05rem;
  }

  .k-uses,
  .k-make,
  .k-why {
    grid-template-columns: minmax(0, 1fr);
  }

  .k-use + .k-use {
    border-inline-start: 0;
    border-block-start: 1px solid var(--k-line);
  }

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

  .k-fxgrid {
    grid-template-columns: minmax(0, 1fr);
  }

  .k-fontrow {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.9rem;
  }

  .k-tester {
    top: 0;
    position: static;
  }

  .k-showcase {
    grid-template-columns: minmax(0, 1fr);
  }

  .k-specimen-stage {
    box-shadow: 5px 5px 0 var(--k-ink);
  }
}

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

  .k-btn,
  .k-fxtile,
  .k-stage,
  .k-specimen-stage,
  .k-case-frame,
  .k-make-card {
    transition: none;
  }
}

/* ── 소개 · 이럴 때 폰꾸 ──────────────────────────────────
 * 해결하는 문제 카드(내 상황으로 거르기)와 그 자리에서 확인하는 증명 데모.
 * 스크립트는 site/landing-proof.js. */
.k-pillars {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-block-end: 2.25rem;
}

.k-pillar {
  display: grid;
  align-content: start;
  gap: 0.6rem;
  padding: 1.4rem 1.5rem;
  border: 1.5px solid var(--k-ink);
  border-radius: var(--k-radius);
  background: var(--k-paper);
  box-shadow: 5px 5px 0 var(--k-ink);
}

.k-pillar h3 {
  margin: 0;
  font-size: 1.25rem;
}

.k-pillar p {
  margin: 0;
  color: var(--k-ink-2);
}

.k-pillar .k-pillar-figure {
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
  min-block-size: 5.5rem;
  color: var(--k-red);
  font-size: clamp(3rem, 7vw, 4.6rem);
  font-weight: 900;
  line-height: 1;
}

.k-pillar-figure small {
  font-size: 0.4em;
  font-weight: 800;
}

.k-pillar-stage {
  display: grid;
  place-items: center;
  min-block-size: 5.5rem;
  overflow: hidden;
  border-radius: var(--k-radius-sm);
  background: var(--k-paper-2);
}

/* '같은 글자도 매번 다르게' — '하' 다섯 개를 저마다 다른 조합으로(site/landing-proof.js) */
.k-pillar-mix {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.45rem;
  min-block-size: 5.5rem;
}

.k-pillar-mix > font-kku {
  grid-column: 1 / -1;
  justify-self: center;
}

.k-mixtile {
  display: grid;
  grid-template-rows: 1fr auto;
  justify-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0.7rem 0.2rem 0.45rem;
  overflow: hidden;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius-sm);
  background: var(--k-tone, var(--k-paper-2));
  color: var(--k-ink);
  transition: transform 220ms var(--k-ease);
}

.k-pillar-mix[data-mode="all"] .k-mixtile:nth-child(odd) { transform: rotate(-2deg); }
.k-pillar-mix[data-mode="all"] .k-mixtile:nth-child(even) { transform: rotate(1.5deg) translateY(2px); }

.k-mixtile[data-tone="dark"],
.k-mixtile[data-tone="board"],
.k-mixtile[data-tone="blueprint"] {
  color: #f4f1ea;
}

.k-mixtile figcaption {
  display: grid;
  justify-items: center;
  gap: 0.05rem;
  max-inline-size: 100%;
  font-size: 0.68rem;
  line-height: 1.25;
  text-align: center;
}

.k-mixtile figcaption strong {
  font-weight: 750;
}

.k-mixtile figcaption span {
  opacity: 0.72;
}

.k-pillar .k-pillar-note {
  font-size: 0.82rem;
}

.k-chips--small button {
  min-block-size: 1.9rem;
  padding: 0.2rem 0.7rem;
  font-size: 0.8rem;
}

.k-pillar-actions,
.k-proof-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 0.9rem;
}

.k-roles {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.9rem;
  margin-block-end: 1rem;
}

.k-roles-label {
  color: var(--k-red);
  font-size: 0.85rem;
  font-weight: 800;
}

.k-probs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.k-prob {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.1rem 1.15rem 1rem;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  background: var(--k-paper);
}

.k-prob h3 {
  margin: 0;
  font-size: 1.03rem;
  line-height: 1.5;
}

.k-prob-tag {
  align-self: flex-start;
  padding: 0.1rem 0.55rem;
  border: 1.5px solid currentColor;
  color: var(--k-blue);
  font-size: 0.74rem;
  font-weight: 800;
}

.k-prob-tag[data-group="seed"] { color: var(--k-red); }
.k-prob-tag[data-group="weight"] { color: #0e7d4f; } /* 작은 글자 — --k-green(3.8:1)보다 짙게 */
.k-prob-tag[data-group="ai"] { color: #7b3fbf; }
.k-prob-tag[data-group="text"] { color: var(--k-ink); }
.k-prob-tag[data-group="make"] { color: #8a5c00; }

.k-prob-why {
  margin: 0;
  color: var(--k-muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

.k-prob-fix {
  margin: 0;
  padding-inline-start: 0.75rem;
  border-inline-start: 3px solid var(--k-green);
  color: var(--k-ink-2);
  font-size: 0.92rem;
  line-height: 1.65;
}

.k-prob .k-prob-proof {
  margin-block-start: auto;
}

.k-prob-proof {
  align-self: flex-start;
  color: var(--k-blue);
  font-size: 0.9rem;
  font-weight: 750;
  text-decoration: none;
}

.k-prob-proof::after {
  content: " →";
}

.k-prob-proof:hover {
  text-decoration: underline;
}

.k-probs-more {
  text-align: center;
}

/* 증명 */
.k-proof {
  margin-block-start: 3rem;
  padding-block-start: 1.75rem;
  border-block-start: 1.5px solid var(--k-ink);
  scroll-margin-top: 72px;
}

.k-proof-title {
  margin: 0 0 1rem;
  font-size: 1.35rem;
}

.k-proof .k-tabs {
  margin-block-end: 1rem;
}

.k-proof-panel {
  display: grid;
  gap: 1rem;
  min-inline-size: 0;
  padding: 1.25rem;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  background: var(--k-paper);
}

.k-proof-sub {
  margin: 0.5rem 0 0;
  font-size: 1rem;
}

.k-proof-note {
  padding-block-start: 0.8rem;
  border-block-start: 1px dashed var(--k-line);
}

.k-switches {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.k-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 650;
  cursor: pointer;
}

.k-switch input {
  inline-size: 1.15rem;
  block-size: 1.15rem;
  accent-color: var(--k-red);
}

.k-vs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.k-vs-side {
  display: grid;
  align-content: start;
  gap: 0.5rem;
  min-inline-size: 0;
  margin: 0;
}

.k-vs-side figcaption {
  color: var(--k-ink-2);
  font-size: 0.86rem;
  font-weight: 800;
}

.k-input--grow {
  flex: 1 1 16rem;
  min-inline-size: 0;
  inline-size: 100%;
}

/* ① 웹폰트를 쓰는 보통 페이지 흉내. 막히면 받지 못한 @font-face가 기본 글꼴로 떨어진다
 * (src는 없는 로컬 글꼴이라 요청 없이 실패한다). 굵기·자간·색은 그대로 두고 글꼴만 바뀐다. */
@font-face {
  font-family: "KkuDemoBlockedWebfont";
  src: local("font-kku-demo-blocked-webfont");
}

.k-wf-title {
  margin: 0;
  color: #ff4f81;
  font-family: var(--k-sans);
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 1.15;
  text-shadow: 0.05em 0 #fff, -0.05em 0 #fff, 0 0.05em #fff, 0 -0.05em #fff, 0.04em 0.07em 0.02em rgb(60 20 40 / 30%);
}

.k-wf-title.is-blocked {
  font-family: "KkuDemoBlockedWebfont", serif;
}

/* ② 보통 글꼴의 되풀이 */
.k-plain-repeat {
  margin: 0;
  color: #3d2c8d;
  font: 800 clamp(30px, 4.4vw, 44px)/1.2 var(--k-sans);
}

/* ③ 서브셋 웹폰트 흉내: 2,350자 밖 글자만 다른(명조) 글꼴 */
.k-missing-summary {
  margin: 0;
  font-weight: 700;
}

.k-subset {
  margin: 0;
  color: var(--k-ink);
  font: 700 clamp(28px, 4vw, 40px)/1.35 var(--k-sans);
  word-break: break-all;
}

.k-subset-miss {
  padding-inline: 0.04em;
  border-radius: 4px;
  background: rgb(214 40 57 / 9%);
  color: var(--k-red);
  font-family: "AppleMyungjo", "Batang", "Noto Serif KR", "Nanum Myeongjo", serif;
  font-weight: 400;
  outline: 1px dashed rgb(214 40 57 / 55%);
}

/* ④ 계기판 */
.k-meter {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0.75rem;
}

.k-meter-cell {
  display: grid;
  align-content: space-between;
  gap: 0.3rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius-sm);
  background: var(--k-paper);
}

.k-meter-cell > span {
  color: var(--k-muted);
  font-size: 0.84rem;
}

.k-meter-cell strong {
  font-size: 1.35rem;
  font-weight: 850;
}

.k-meter-cell em {
  color: var(--k-muted);
  font-size: 0.78rem;
  font-style: normal;
}

.k-meter-cell--big strong {
  color: var(--k-red);
  font-size: 2.4rem;
  line-height: 1;
}

.k-meter-cell--sum {
  border-color: var(--k-ink);
  background: var(--k-ink);
}

.k-meter-cell--sum > span,
.k-meter-cell--sum strong,
.k-meter-cell--sum em {
  color: #fff;
}

/* ⑤ 마크다운 → 텍스트 */
.k-field-label {
  font-size: 0.9rem;
  font-weight: 800;
}

.k-textarea {
  inline-size: 100%;
  min-block-size: 15rem;
  padding: 0.8rem 1rem;
  border: 1.5px solid var(--k-ink);
  border-radius: var(--k-radius-sm);
  background: var(--k-paper);
  color: var(--k-ink);
  font: 0.88rem/1.6 var(--k-mono);
  resize: vertical;
}

.k-textarea:focus-visible {
  outline: 3px solid var(--k-yellow);
  outline-offset: 2px;
}

.k-terminal pre.k-md-output {
  min-block-size: 18rem;
  font-size: 0.92rem;
  line-height: 1.5;
}

/* ⑥ AI로 세 번 */
.k-runs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.k-run {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: 0.4rem;
  min-inline-size: 0;
  min-block-size: 6.5rem;
  padding: 0.8rem 0.9rem;
  overflow: hidden;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius-sm);
  background: var(--k-paper);
}

.k-run > span {
  color: var(--k-muted);
  font-size: 0.8rem;
  font-weight: 700;
}

.k-run-plain {
  margin: 0;
  line-height: 1.2;
}

.k-run-plain--1 { color: #d62839; font: 800 clamp(24px, 3vw, 30px)/1.2 var(--k-sans); }
.k-run-plain--2 { color: #6b3f1d; font: 600 clamp(24px, 3vw, 30px)/1.2 "AppleMyungjo", "Batang", "Noto Serif KR", serif; letter-spacing: 0.06em; }
.k-run-plain--3 { color: #1f4fd1; font: 700 clamp(20px, 2.6vw, 26px)/1.2 var(--k-mono); }

/* ⑦ 이미지 대신 텍스트 */
.k-text-canvas {
  display: block;
  inline-size: 100%;
  max-inline-size: 560px;
  block-size: auto;
  aspect-ratio: 4 / 1;
}

/* 정직한 경계 */
.k-limits {
  margin-block-start: 2rem;
  padding: 1.2rem 1.4rem;
  border: 1.5px dashed var(--k-ink);
  border-radius: var(--k-radius);
  background: var(--k-paper);
}

.k-limits h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.k-limits ul {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding-inline-start: 1.2rem;
  color: var(--k-ink-2);
  font-size: 0.94rem;
}

@media (max-width: 960px) {
  .k-probs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  /* 좁은 화면의 머리말은 두 줄(약 97px)이다 — 앵커가 그 밑으로 숨지 않게 */
  .k-section { scroll-margin-top: 104px; }
  .k-prose > section,
  .k-prose h2.k-h2 { scroll-margin-top: 112px; }
  .k-proof { scroll-margin-top: 108px; }

  .k-pillars,
  .k-probs,
  .k-vs,
  .k-runs {
    grid-template-columns: minmax(0, 1fr);
  }

  .k-pillar {
    box-shadow: 4px 4px 0 var(--k-ink);
  }

  .k-pillar-mix {
    gap: 0.3rem;
  }

  .k-mixtile figcaption span {
    display: none;
  }

  .k-proof-panel {
    padding: 1rem;
  }
}