/* 웹 앱(전광판·메모장) — site.css 위에 얹는다. 편집면·화면 자판은 site/app-kit.js가 만든다.
 * 한글 글꼴이 없는 기기에서도 쓰는 화면이라, 한글은 폰꾸 그림 자소 글꼴로만 그리고
 * 기기 글꼴로 쓰는 글은 영어로 바꿀 수 있게 둔다(data-en, app-kit.js). */

/* ── 글꼴 없는 모드 ───────────────────────────────────── */
[data-hangul-font="none"] .k-brand-name strong {
  display: none;
}

/* 그림 자소는 color를 따르지 않는다 — 도장 안 글자는 희게, 강조 초성은 적색 필터로 */
[data-hangul-font="none"] .k-stamp font-kku {
  --fy-sprite-filter: brightness(0) invert(1);
}

[data-hangul-font="none"] .k-mark :is([part~="choseong"], [part~="head"]) {
  --fy-sprite-filter: url(#kk-tint-cho);
}

.app-nofont {
  display: none;
}

[data-hangul-font="none"] .app-nofont {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin: 0;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--k-ink);
  border-radius: var(--k-radius-sm);
  background: #fffaeb;
  font-size: 0.92rem;
}

/* ── 앱 공통 ──────────────────────────────────────────── */
.app-head .k-kicker {
  display: block;
}

.app-layout {
  display: grid;
  gap: 1.25rem;
  padding-block: 0.5rem 4rem;
}

.app-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1rem;
}

.app-field {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.35rem;
  min-inline-size: 0;
}

.app-field > span,
.app-label {
  color: var(--k-muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.app-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
  align-items: start;
  gap: 1rem 1.5rem;
}

.app-range {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.app-range input {
  flex: 1;
  min-inline-size: 0;
  accent-color: var(--k-red);
}

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

.app-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.app-status {
  color: var(--k-muted);
  font-family: var(--k-mono);
  font-size: 0.8rem;
}

/* 한/영 전환 단추 — 지금 모드를 크게 */
.app-mode {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-block-size: 2.4rem;
  padding: 0.2rem 0.85rem 0.2rem 0.4rem;
  border: 1.5px solid var(--k-ink);
  border-radius: 999px;
  background: var(--k-paper);
  color: var(--k-ink);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 750;
  cursor: pointer;
}

.app-mode-badge {
  display: inline-grid;
  place-items: center;
  inline-size: 1.85rem;
  block-size: 1.85rem;
  border-radius: 50%;
  background: var(--k-red);
  color: #fff;
  font-family: var(--k-mono);
  font-size: 0.72rem;
}

.app-mode-badge font-kku {
  --fy-sprite-filter: brightness(0) invert(1);
}

.app-mode[data-mode="latin"] .app-mode-badge {
  background: var(--k-ink);
}

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

.app-kbd {
  padding: 0.05rem 0.4rem;
  border: 1px solid var(--k-line);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--k-paper);
  font-family: var(--k-mono);
  font-size: 0.82em;
}

/* ── 편집면 ───────────────────────────────────────────── */
.kk-editor {
  --kk-editor-size: 30px;
  position: relative;
  min-inline-size: 0;
}

.kk-editor-view {
  position: relative;
  min-block-size: calc(var(--kk-editor-size) * 1.2);
  cursor: text;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

.kk-editor--single .kk-editor-view {
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}

.kk-editor--single .kk-editor-view::-webkit-scrollbar {
  display: none;
}

.kk-editor-lines {
  position: relative;
}

.kk-editor .kk-line {
  display: block;
}

.kk-editor--single .kk-line {
  display: inline-block;
  min-inline-size: 100%;
}

.kk-editor-placeholder {
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  display: none;
  opacity: 0.32;
  pointer-events: none;
}

.kk-editor.is-empty .kk-editor-placeholder {
  display: inline-block;
}

.kk-editor-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.kk-caret {
  position: absolute;
  inline-size: max(2px, calc(var(--kk-editor-size) * 0.07));
  margin-inline-start: -1px;
  border-radius: 2px;
  background: var(--kk-caret, var(--k-red));
  opacity: 0;
}

.kk-editor.is-focused .kk-caret {
  opacity: 1;
  animation: kk-caret-blink 1.06s steps(1) infinite;
}

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

.kk-sel {
  position: absolute;
  background: rgba(242, 183, 5, 0.38);
}

/* 조합 중인 음절: 입력기처럼 밑줄과 옅은 칠 */
.kk-compose {
  position: absolute;
  border-block-end: max(2px, calc(var(--kk-editor-size) * 0.06)) solid var(--k-blue);
  background: rgba(31, 79, 209, 0.12);
}

.kk-editor-input {
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: 0;
  inline-size: 2px;
  block-size: 1.4em;
  margin: 0;
  padding: 0;
  border: 0;
  outline: none;
  overflow: hidden;
  resize: none;
  opacity: 0;
  background: transparent;
  color: transparent;
  caret-color: transparent;
  font-size: 16px; /* iOS가 초점 때 확대하지 않게 */
  pointer-events: none;
}

/* ── 화면 자판 ────────────────────────────────────────── */
.kk-keys {
  --kk-key-size: clamp(13px, 3.6vw, 26px);
  display: grid;
  max-inline-size: 56rem;
  gap: clamp(3px, 0.6vw, 6px);
  padding: clamp(6px, 1.2vw, 12px);
  border: 1.5px solid var(--k-ink);
  border-radius: var(--k-radius);
  background: var(--k-paper-2);
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
}

.kk-keys-row {
  display: grid;
  grid-template-columns: repeat(28, minmax(0, 1fr));
  gap: clamp(3px, 0.6vw, 6px);
}

.kk-key {
  position: relative;
  display: grid;
  place-items: center;
  grid-column: span 2;
  min-inline-size: 0;
  aspect-ratio: 1 / 1.08;
  padding: 0;
  border: 1.2px solid var(--k-ink);
  border-radius: clamp(4px, 0.8vw, 8px);
  background: var(--k-paper);
  color: var(--k-ink);
  box-shadow: 0 2px 0 var(--k-ink);
  font: inherit;
  font-size: clamp(11px, 2.6vw, 18px);
  line-height: 1;
  cursor: pointer;
  transition: transform 80ms ease, box-shadow 80ms ease;
}

.kk-keys-row--1 .kk-key:first-child { grid-column: 2 / span 2; }
.kk-keys-row--2 .kk-key:first-child { grid-column: 3 / span 2; }
.kk-keys-row--3 .kk-key:first-child { grid-column: 4 / span 2; }

.kk-key:active,
.kk-key.is-down {
  transform: translateY(2px);
  box-shadow: 0 0 0 var(--k-ink);
  background: #fff4d1;
}

.kk-key:focus-visible {
  outline: 3px solid var(--k-yellow);
  outline-offset: 1px;
}

.kk-key-latin {
  position: absolute;
  inset-block-start: 3px;
  inset-inline-start: 4px;
  color: var(--k-muted);
  font-family: var(--k-mono);
  font-size: clamp(8px, 1.6vw, 11px);
}

.kk-key-sym {
  font-family: var(--k-mono);
  font-weight: 700;
}

.kk-key-glyph {
  margin-block-start: 0.1em;
}

/* 초성 적, 중성 청, 종성 녹 — 그림 자소는 SVG 필터로 칠한다(app-kit.js ensureTint) */
.kk-key[data-role="cho"] .kk-key-glyph { --fy-sprite-filter: url(#kk-tint-cho); color: #d62839; }
.kk-key[data-role="jung"] .kk-key-glyph { --fy-sprite-filter: url(#kk-tint-jung); color: #1f4fd1; }
.kk-key[data-role="jong"] .kk-key-glyph { --fy-sprite-filter: url(#kk-tint-jong); color: #12965f; }
.kk-key[data-role="jong"] { background: #f1faf5; }

.kk-keys[data-mode="latin"] .kk-key[data-key] .kk-key-glyph,
.kk-keys[data-mode="latin"] .kk-key[data-key] .kk-key-sym {
  visibility: hidden;
}

.kk-keys[data-mode="latin"] .kk-key[data-key] .kk-key-latin {
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--k-ink);
  font-size: clamp(11px, 2.6vw, 17px);
}

.kk-keys-row--mods .kk-key {
  aspect-ratio: auto;
  min-block-size: clamp(30px, 7vw, 46px);
  font-family: var(--k-mono);
  font-size: clamp(11px, 2.4vw, 15px);
  font-weight: 700;
}

.kk-key--shift { grid-column: span 5; }
.kk-key--toggle { grid-column: span 4; }
.kk-key--space { grid-column: span 11; }
.kk-key--backspace { grid-column: span 4; }
.kk-key--enter { grid-column: span 4; }

.kk-keys:not(:has(.kk-key--enter)) .kk-key--space { grid-column: span 15; }

.kk-key--shift[aria-pressed="true"],
.kk-keys.is-shifted .kk-key--shift {
  background: var(--k-ink);
  color: #fff;
}

.kk-key--toggle .kk-key-glyph {
  --fy-sprite-filter: url(#kk-tint-cho);
}

.kk-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--k-muted);
  font-size: 0.8rem;
}

.kk-legend li {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.kk-legend i {
  inline-size: 0.8rem;
  block-size: 0.8rem;
  border-radius: 3px;
}

/* ── 전광판 ───────────────────────────────────────────── */
.sign {
  --led: #ff3b30;
  --sign-size: var(--sign-size-user, 120px);
  /* 점 간격은 글자 크기의 1/32 — 그림 자소 칸은 자리마다 늘이고 옮겨져 도트 글꼴의 16칸
   * 격자에도 맞지 않으므로, 한 칸을 2×2 점으로 덮어야 획이 반쪽 점으로 깨지지 않는다 */
  --dot: calc(var(--sign-size) / 32);
  position: relative;
  display: grid;
  align-content: center;
  padding: clamp(10px, 2.4vw, 22px);
  overflow: hidden;
  border-radius: var(--k-radius);
  background: #0c0c10;
  box-shadow: inset 0 0 0 6px #1b1b22, 8px 8px 0 var(--k-ink);
}

.sign-window {
  position: relative;
  overflow: hidden;
  /* 그림 자소 칸은 글자 상자(1.2em)의 위 1em에 있다 — 위를 세 점 띄워 잉크를 가운데로 */
  padding-block: calc(var(--dot) * 3) 0;
  min-block-size: calc(var(--sign-size) * 1.2 + var(--dot) * 3);
  /* 꺼진 LED 점 */
  background-image: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.07) 0 38%, transparent 44%);
  background-size: var(--dot) var(--dot);
}

/* 켜진 LED: 글자를 점 격자로 오려 낸다 — 그림 자소든 기기 글꼴 글자든 같은 점이 된다 */
.sign-lit {
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 0 54%, transparent 62%);
  mask-image: radial-gradient(circle at 50% 50%, #000 0 54%, transparent 62%);
  -webkit-mask-size: var(--dot) var(--dot);
  mask-size: var(--dot) var(--dot);
}

.sign[data-dots="off"] .sign-lit {
  -webkit-mask-image: none;
  mask-image: none;
}

.sign-track {
  display: inline-block;
  white-space: nowrap;
  filter: drop-shadow(0 0 calc(var(--sign-size) * 0.035) var(--led));
  will-change: transform;
}

.sign-track font-kku {
  color: var(--led);
  --fy-sprite-filter: url(#sign-led);
}

.sign[data-mode="static"] .sign-track,
.sign[data-mode="blink"] .sign-track {
  display: block;
  white-space: normal;
  text-align: center;
}

.sign[data-mode="blink"] .sign-track {
  animation: sign-blink var(--blink, 1.2s) steps(1) infinite;
}

@keyframes sign-blink {
  50% { opacity: 0; }
}

.sign-fullscreen {
  position: absolute;
  inset-block-start: 8px;
  inset-inline-end: 8px;
  z-index: 2;
  display: grid;
  place-items: center;
  inline-size: 2.2rem;
  block-size: 2.2rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  background: rgba(12, 12, 16, 0.7);
  color: #fff;
  font: inherit;
  font-size: 1rem;
  cursor: pointer;
  opacity: 0.75;
}

.sign-fullscreen:hover,
.sign-fullscreen:focus-visible {
  opacity: 1;
}

.sign:fullscreen,
.sign.is-pseudo-fullscreen {
  --sign-size: var(--sign-size-fit, min(52vh, 34vw));
  border-radius: 0;
  box-shadow: none;
}

.sign.is-pseudo-fullscreen {
  position: fixed;
  inset: 0;
  z-index: 100;
}

.sign-swatches {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.sign-swatches button {
  inline-size: 1.8rem;
  block-size: 1.8rem;
  border: 2px solid var(--k-paper);
  border-radius: 50%;
  background: var(--swatch);
  box-shadow: 0 0 0 1.5px var(--k-line);
  cursor: pointer;
}

.sign-swatches button[aria-pressed="true"] {
  box-shadow: 0 0 0 2.5px var(--k-ink);
}

.sign-swatches input[type="color"] {
  inline-size: 2rem;
  block-size: 2rem;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.sign-input {
  padding: 0.55rem 0.9rem;
  border: 1.5px solid var(--k-ink);
  border-radius: var(--k-radius-sm);
  background: var(--k-paper);
}

.sign-input .kk-editor {
  --kk-editor-size: clamp(26px, 5vw, 36px);
}

.sign-input:focus-within,
.memo-paper:focus-within {
  outline: 3px solid var(--k-yellow);
  outline-offset: 2px;
}

/* ── 메모장 ───────────────────────────────────────────── */
.memo-paper {
  --memo-rule: rgba(31, 79, 209, 0.14);
  min-block-size: 18rem;
  padding: 1.1rem 1.25rem 2rem;
  border: 1.5px solid var(--k-ink);
  border-radius: 4px;
  background: var(--memo-paper, #fffdf6);
  box-shadow: 6px 6px 0 var(--k-ink);
}

.memo-paper .kk-editor-view {
  min-block-size: 14rem;
  /* 줄 높이(1.2em)마다 괘선 */
  background-image: linear-gradient(transparent calc(100% - 1px), var(--memo-rule) calc(100% - 1px));
  background-size: 100% calc(var(--kk-editor-size) * 1.2);
}

.memo-paper[data-tone="board"] {
  --memo-paper: #24392f;
  --memo-rule: rgba(255, 255, 255, 0.1);
  --kk-caret: #f2b705;
}

.memo-paper[data-tone="paper"] {
  --memo-paper: #f7f0e1;
}

.memo-paper[data-tone="board"] .kk-sel {
  background: rgba(242, 183, 5, 0.3);
}

.memo-help {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--k-ink-2);
  font-size: 0.92rem;
}

/* ── 사례 페이지의 웹 앱 칸 ───────────────────────────── */
.k-apps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.k-app-card {
  display: grid;
  align-content: start;
  gap: 0.8rem;
  min-inline-size: 0;
  padding: 1.25rem;
  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-app-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--k-red);
}

.k-app-card h3 {
  margin: 0;
  font-size: 1.2rem;
}

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

.k-app-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  min-block-size: 6.5rem;
  overflow: hidden;
  border-radius: var(--k-radius-sm);
}

.k-app-preview--sign {
  background: #0c0c10;
}

.k-app-preview--sign font-kku {
  color: #ff3b30;
  --fy-sprite-filter: url(#k-app-led) drop-shadow(0 0 3px #ff3b30);
}

.k-app-preview--memo {
  justify-content: flex-start;
  padding-inline: 1rem;
  border: 1px solid var(--k-line);
  background: #fffdf6 linear-gradient(transparent calc(100% - 1px), rgba(31, 79, 209, 0.14) calc(100% - 1px)) 0 0 / 100% 36px;
}

@media (max-width: 720px) {
  .k-apps {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 좁은 화면: 키 폭은 그대로, 키를 길게 해 누를 자리를 키운다 */
  .kk-keys {
    --kk-key-size: clamp(13px, 4.6vw, 24px);
  }

  .kk-key {
    aspect-ratio: 1 / 1.5;
  }

  .sign {
    box-shadow: inset 0 0 0 4px #1b1b22, 5px 5px 0 var(--k-ink);
  }

  .memo-paper {
    padding: 0.8rem 0.85rem 1.4rem;
    box-shadow: 4px 4px 0 var(--k-ink);
  }
}

@media (prefers-reduced-motion: reduce) {
  .kk-editor.is-focused .kk-caret {
    animation: none;
  }

  .k-app-card {
    transition: none;
  }
}