/* ── 디자인 원칙 ─────────────────────────────────────────────
   바우하우스: 삼원색(파스텔) + 삼무채색만 사용.
   칸딘스키 대응을 시스템으로 씀 — 노랑=삼각형, 빨강=사각형, 파랑=원.
   기본 모드=●파랑, 역방향=■빨강, 동음 연결=▲노랑, 랜덤=세 도형.
   레이아웃: 넓은 여백, 좌측 정렬 그리드, 굵은 기하 도형은 한 화면에 하나의 강조로만. */
:root{
  --red:#E26B5C;  --yellow:#F1C24E;  --blue:#5A86C7;      /* 삼원색 (파스텔 톤) */
  --ink:#1F1E1C;  --grey:#9C9A95;    --paper:#F7F6F2;     /* 삼무채색 */
  --grey-text:#6B6964;                                     /* 밝은 화면의 보조 글씨 전용: 회색을 먹색 쪽으로 낮춤 (종이색 대비 5.1:1) */
  --bg:var(--paper); --fg:var(--ink); --sub:var(--grey-text);
  --line:color-mix(in srgb, var(--grey) 38%, transparent);
  --soft:color-mix(in srgb, var(--grey) 14%, transparent);
  /* 글꼴: 사이트에 직접 올린 가변 글꼴. 라틴·숫자는 Jost, 본문은 언어별 Noto */
  --body:"Noto Sans KR Variable","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  --display:"Jost Variable","Futura","Century Gothic",var(--body);
  --ease:cubic-bezier(.22,1,.36,1);
  --shape-stroke:transparent;                              /* 다크 모드에서만 도형 윤곽선(흰색) */
  --scrim:color-mix(in srgb, var(--ink) 55%, transparent);
  color-scheme:light;
}
:root:lang(ja){--body:"Noto Sans JP Variable","Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic","Meiryo",system-ui,sans-serif}
:root:lang(en){--body:"Jost Variable","Futura","Century Gothic",system-ui,sans-serif}
/* 다크 모드: 먹색 ↔ 종이색만 바꾸고 삼원색은 그대로. 도형마다 흰 윤곽선을 둘러 검은 바탕과 분리 */
:root[data-theme="dark"]{
  --bg:var(--ink); --fg:var(--paper); --sub:var(--grey);
  --line:color-mix(in srgb, var(--grey) 32%, transparent);
  --soft:color-mix(in srgb, var(--grey) 13%, transparent);
  --shape-stroke:var(--paper);
  --scrim:rgba(0,0,0,.62);
  color-scheme:dark;
}
/* color-mix()를 지원하지 않는 구형 브라우저용 (선·면이 사라지지 않도록) */
@supports not (color:color-mix(in srgb, red 50%, blue)){
  :root{--line:rgba(156,154,149,.38);--soft:rgba(156,154,149,.14);--scrim:rgba(31,30,28,.55)}
  :root[data-theme="dark"]{--line:rgba(156,154,149,.32);--soft:rgba(156,154,149,.13);--scrim:rgba(0,0,0,.62)}
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{height:100%;background:var(--bg);color:var(--fg)}
body{font-family:var(--body);font-size:15px;line-height:1.55;overflow:hidden;-webkit-font-smoothing:antialiased;word-break:keep-all;overflow-wrap:break-word}
button,input,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px}
.num{font-family:var(--display);font-variant-numeric:tabular-nums}

/* ── 화면 전환 ── */
.screen{position:fixed;inset:0;display:none;overflow-y:auto;overflow-x:hidden;
  padding:max(20px,env(safe-area-inset-top)) 20px max(28px,env(safe-area-inset-bottom))}
.screen.on{display:block;animation:enter .42s var(--ease) both}
@keyframes enter{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.inner{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:28px}

/* ── 상단 바 ── */
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px}
.mark{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:600;font-size:15px;letter-spacing:.02em}
.mark svg{flex:none}
.bar-r{display:flex;gap:6px;align-items:center}
.icon{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:0;color:var(--fg)}
.icon:hover{background:var(--soft)}
.lang{font-family:var(--display);font-weight:600;font-size:13px;letter-spacing:.08em;padding:0 10px;height:36px;border:1.5px solid var(--fg)}
.lang:hover{background:var(--fg);color:var(--bg)}
.back{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px;height:44px}

/* ── 공통 요소 ── */
h1.title{font-family:var(--display);font-weight:700;font-size:clamp(28px,6vw,40px);letter-spacing:-.01em;line-height:1.1;text-wrap:balance}
.eyebrow{font-family:var(--display);font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--sub)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:52px;padding:0 26px;
  font-weight:700;font-size:16px;border:2px solid var(--fg);background:transparent;transition:transform .12s, background .15s, color .15s}
.btn:active{transform:translateY(2px)}
.btn.solid{background:var(--fg);color:var(--bg)}
.btn.blue{background:var(--blue);border-color:var(--blue);color:#fff}
.btn.red{background:var(--red);border-color:var(--red);color:#fff}
.btn.sm{height:38px;padding:0 14px;font-size:13.5px;border-width:1.5px}
.btn:disabled{opacity:.35;cursor:not-allowed}
.kbd{font-family:var(--display);font-size:11px;font-weight:600;letter-spacing:.06em;opacity:.65;border:1px solid currentColor;padding:1px 6px}
.rule{height:2px;background:var(--fg)}
.hint{font-size:13px;color:var(--sub);line-height:1.6}
.toast{position:fixed;left:50%;bottom:max(28px,env(safe-area-inset-bottom));transform:translate(-50%,140%);
  background:var(--fg);color:var(--bg);padding:12px 18px;font-weight:700;font-size:14px;display:flex;gap:10px;align-items:center;
  transition:transform .45s var(--ease), visibility 0s .45s;z-index:60;max-width:calc(100vw - 32px);visibility:hidden}
.toast.on{transform:translate(-50%,0);visibility:visible;transition:transform .45s var(--ease)}

/* ── 홈 ── */
#home .inner{min-height:calc(100% - 10px);max-width:1040px}
/* 넓은 화면: 왼쪽 훈련 목록이 세로로 길게, 오른쪽에 기록·시작. 좁은 화면: 한 줄로 쌓되 시작 버튼 바로 위에 훈련 목록 */
.home-grid{display:grid;grid-template-columns:minmax(0,1fr);grid-template-areas:"hero" "today" "modes" "start" "chip";gap:28px}
@media (min-width:860px){
  .home-grid{grid-template-columns:300px minmax(0,1fr);column-gap:56px;row-gap:28px;
    grid-template-areas:"modes hero" "modes today" "modes start" "modes chip";align-items:start;margin-top:3vh}
  .home-grid .hero{margin-top:0}
}
.home-grid .hero{grid-area:hero} .home-grid .today{grid-area:today} .mode-list{grid-area:modes}
.home-grid .start-row{grid-area:start} .home-grid .setup-chip{grid-area:chip}
.mode-list{display:flex;flex-direction:column;gap:12px}
.mode-col{display:flex;flex-direction:column;gap:10px}
.mode{width:100%;height:88px;display:grid;grid-template-columns:52px minmax(0,1fr);align-items:center;gap:14px;
  padding:0 16px;text-align:left;border:1.5px solid var(--line);background:transparent}
.mode.on{border:2px solid var(--fg);background:var(--soft);padding:0 15.5px}
.mode .ic{height:40px;display:flex;align-items:center;justify-content:center}
.mode .tx{display:flex;flex-direction:column;gap:2px;min-width:0}
.mode .nm{font-weight:700;font-size:16px}
.mode .ds{font-size:12.5px;color:var(--sub);line-height:1.4}
/* 마우스를 올리면 도형만 살짝 움직인다 (색은 바뀌지 않음) */
.mode .shape{transition:transform .35s var(--ease)}
.mode .shape.square{transform-origin:50% 50%}
.mode .shape.tri{transform-origin:50% 70%}
.mode:hover .shape.square,.mode:focus-visible .shape.square{transform:rotate(12deg)}
.mode:hover .shape.tri,.mode:focus-visible .shape.tri{transform:rotate(-10deg)}
.mode:hover .shape.circle,.mode:focus-visible .shape.circle{animation:droplet .7s var(--ease)}
.mode:hover .trio .shape:nth-child(2){transition-delay:.05s}
.mode:hover .trio .shape:nth-child(3){transition-delay:.1s}
@keyframes droplet{0%{transform:scale(1,1)}30%{transform:scale(1.12,.88)}55%{transform:scale(.93,1.07)}78%{transform:scale(1.03,.97)}100%{transform:scale(1,1)}}
.hero{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:20px;margin-top:4vh}
.streak-n{font-family:var(--display);font-weight:800;font-size:clamp(110px,30vw,220px);line-height:.82;letter-spacing:-.04em}
.streak-l{font-weight:700;font-size:clamp(16px,3.6vw,20px);margin-top:14px}
.streak-s{color:var(--sub);font-size:14px;margin-top:4px}
.comp{width:clamp(120px,30vw,200px);aspect-ratio:1;position:relative}
.comp > *{position:absolute}
.c-circle{width:62%;aspect-ratio:1;border-radius:50%;background:var(--blue);left:0;bottom:0;animation:drop .9s var(--ease) both;box-shadow:0 0 0 3px var(--shape-stroke)}
.c-square{width:44%;aspect-ratio:1;background:var(--red);right:0;bottom:0;animation:slide .9s .12s var(--ease) both;box-shadow:0 0 0 3px var(--shape-stroke)}
.c-tri{width:46%;height:auto;right:12%;top:0;animation:spin .9s .24s var(--ease) both;transform-origin:50% 66%;overflow:visible}
@keyframes drop{from{transform:translateY(-60%);opacity:0}to{transform:none;opacity:1}}
@keyframes slide{from{transform:translateX(60%);opacity:0}to{transform:none;opacity:1}}
@keyframes spin{from{transform:rotate(-120deg) scale(.4);opacity:0}to{transform:none;opacity:1}}
.today{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.today .cell{width:22px;height:22px;border:1.5px solid var(--fg);transition:background .3s}
.today .cell.f{background:var(--blue);border-color:var(--blue)}
.today .lbl{margin-left:8px;font-size:13.5px;color:var(--sub)}
.start-row{display:flex;gap:10px;flex-wrap:wrap;align-items:stretch}
.start-row .btn.solid{flex:1 1 240px;height:68px;font-size:19px}
.setup-chip{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:2px solid var(--fg);padding-top:14px;flex-wrap:wrap}
.setup-chip .what{display:flex;gap:10px;align-items:center;font-weight:700;min-width:0}
.setup-chip .what span.d{color:var(--sub);font-weight:500}
.home-links{display:flex;gap:10px;flex-wrap:wrap}

/* ── 모드 도형 (SVG, 다크 모드에서 흰 윤곽선) ── */
.shape{display:inline-block;flex:none;overflow:visible;vertical-align:middle}
.trio{display:inline-flex;gap:3px;align-items:flex-end}

/* ── 설정 ── */
.sec{display:flex;flex-direction:column;gap:14px}
.sec-h{display:flex;align-items:baseline;justify-content:space-between;gap:10px;border-bottom:2px solid var(--fg);padding-bottom:8px}
.sec-h h2{font-family:var(--display);font-size:18px;font-weight:700}
.range-row{display:grid;grid-template-columns:72px minmax(0,1fr);align-items:center;gap:12px}
.range-row .k{font-weight:700}
.stepper{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.step{display:flex;align-items:center;border:1.5px solid var(--fg)}
.step button{width:40px;height:44px;font-size:20px;font-weight:500}
.step button:hover{background:var(--soft)}
.step output{min-width:44px;text-align:center;font-family:var(--display);font-weight:700;font-size:20px}
.stepper .dash{color:var(--sub)}
.opt{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line)}
.opt .tx{min-width:0}
.opt .tx b{display:block;font-size:15px}
.opt .tx span{font-size:12.5px;color:var(--sub)}
.sw{position:relative;width:52px;height:30px;flex:none;border:2px solid var(--fg);transition:background .2s}
.sw::after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;background:var(--fg);transition:transform .25s var(--ease), background .2s, border-radius .25s}
.sw[aria-checked="true"]{background:var(--fg)}
.sw[aria-checked="true"]::after{transform:translateX(22px);background:var(--yellow);border-radius:50%}
.goal{display:flex;align-items:center;gap:8px}
/* 다크 모드 버튼: 평소엔 테두리만 있는 초승달. 올리면 노랗게 채워지며 삼각형처럼 기울고, 테두리 주변이 번진다 */
.moon{width:52px;height:52px;display:flex;align-items:center;justify-content:center;flex:none}
.moon svg{overflow:visible;transform-origin:50% 70%;transition:transform .35s var(--ease), filter .45s var(--ease);filter:drop-shadow(0 0 0 transparent)}
.moon path{fill:var(--bg);stroke:var(--fg);stroke-width:5;stroke-linejoin:round;transition:fill .3s var(--ease)}
.moon[aria-pressed="true"] path{fill:var(--yellow)}
.moon:hover svg,.moon:focus-visible svg{transform:rotate(-10deg);filter:drop-shadow(0 0 5px var(--fg))}
.moon:hover path,.moon:focus-visible path{fill:var(--yellow)}
.goal input{width:70px;height:40px;text-align:center;border:1.5px solid var(--fg);background:transparent;font-family:var(--display);font-weight:700;font-size:17px}
.goal input:disabled{opacity:.3}
.inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.inp{border:1.5px solid var(--line);padding:14px;text-align:left;display:flex;flex-direction:column;gap:4px}
.inp.on{border-color:var(--fg);background:var(--soft)}
.inp b{font-size:15px}
.inp > span{font-size:12.5px;color:var(--sub);line-height:1.45}
.badge{display:inline-block;font-size:11px;font-weight:700;padding:1px 7px;margin-left:6px;vertical-align:2px}
.badge.need{background:var(--yellow);color:var(--ink)}
.badge.ok{background:var(--blue);color:#fff}

/* ── 연습 ── */
#practice{overflow-x:hidden;overflow-y:auto;display:none;flex-direction:column}
#practice.on{display:flex}
.p-top{display:flex;align-items:center;justify-content:space-between;gap:12px;max-width:900px;width:100%;margin:0 auto}
.p-info{font-size:13px;color:var(--sub);text-align:right;font-variant-numeric:tabular-nums}
.p-info b{color:var(--fg)}
.sess{display:flex;gap:4px;justify-content:center;margin-top:10px}
.sess i{width:14px;height:6px;background:var(--line);transition:background .3s}
.sess i.f{background:var(--blue)}
.sess.done i{background:var(--yellow)}
.stage{flex:1 0 auto;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;text-align:center;padding:10px 0}
.qtag{display:flex;gap:10px;align-items:center;font-size:13px;color:var(--sub);font-weight:500}
.prompt{font-weight:900;font-size:clamp(40px,11vw,86px);line-height:1.08;letter-spacing:-.02em;text-wrap:balance}
.prompt .pr{display:block;font-size:clamp(14px,3.6vw,18px);font-weight:500;color:var(--sub);letter-spacing:0;margin-bottom:8px}
/* 동음 연결: 문제의 현·프랫 범위를 테두리 칩으로 크게, 문제 글자와 간격을 더 두어 위로 */
.range-chip{display:inline-flex;align-items:center;gap:10px;border:2px solid var(--fg);padding:8px 16px;
  font-size:clamp(17px,4.4vw,22px);font-weight:700;color:var(--fg);margin-bottom:26px;letter-spacing:0;line-height:1.3}
.range-chip .shape{flex:none}
/* 동음 연결 정답 화면의 ‘A# 모두 짚기’ */
.qtag.strong{font-size:clamp(20px,5vw,26px);font-weight:800;color:var(--fg);gap:12px}
.prompt.in{animation:qin .38s var(--ease) both}
@keyframes qin{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.answer{font-family:var(--display);font-weight:800;font-size:clamp(76px,22vw,160px);line-height:1;letter-spacing:-.03em;animation:pop .42s var(--ease) both}
.answer.sm{font-size:clamp(46px,12vw,88px)}
@keyframes pop{from{opacity:0;transform:scale(.7)}to{opacity:1;transform:none}}
.timer{font-family:var(--display);font-weight:500;font-size:clamp(26px,7vw,40px);color:var(--sub);font-variant-numeric:tabular-nums}
.timer.fast{color:var(--blue)} .timer.slow{color:var(--red)} .timer.done{color:var(--fg)}
.cd{position:relative;width:clamp(120px,30vw,170px);aspect-ratio:1;display:flex;align-items:center;justify-content:center}
.cd .sh{position:absolute;inset:0;animation:cdIn .42s var(--ease) both}
.cd .n{position:relative;font-family:var(--display);font-weight:800;font-size:clamp(54px,14vw,78px);color:#fff;animation:cdIn .42s var(--ease) both}
.cd.t3 .n{color:var(--ink);padding-top:18%}
@keyframes cdIn{from{opacity:0;transform:scale(.35) rotate(-30deg)}to{opacity:1;transform:none}}
.p-actions{display:flex;gap:10px;justify-content:center;width:100%;max-width:520px;margin:0 auto;min-height:60px}
.p-actions .btn{flex:1;height:60px;font-size:17px}
.gtx{font-size:17px;color:var(--fg);font-weight:500;text-align:center;min-height:26px;margin-bottom:26px;line-height:1.5;padding:0 8px}
.gtx b{color:var(--fg);font-weight:800}
.gtx:empty{display:none}
.glev{display:inline-block;width:46px;height:6px;background:var(--line);vertical-align:2px;margin-left:8px;position:relative;overflow:hidden}
.glev i{position:absolute;inset:0 auto 0 0;width:0;background:var(--blue)}
.burst{position:fixed;left:50%;top:50%;width:40px;height:40px;margin:-20px 0 0 -20px;pointer-events:none;z-index:5;opacity:0}
.burst.o{border-radius:50%;background:var(--blue);animation:burst .55s var(--ease) forwards}
.burst.x{background:var(--red);animation:burstx .5s var(--ease) forwards}
@keyframes burst{0%{opacity:.5;transform:scale(1)}100%{opacity:0;transform:scale(14)}}
@keyframes burstx{0%{opacity:.5;transform:scale(1) rotate(0)}100%{opacity:0;transform:scale(12) rotate(45deg)}}
.shake{animation:shake .35s}
@keyframes shake{20%,60%{transform:translateX(-8px)}40%,80%{transform:translateX(8px)}}
.miniboard{max-width:100%;height:auto;display:block;margin:0 auto}
.mb-dot{opacity:0;transform-box:fill-box;transform-origin:center;transform:scale(0);transition:opacity .2s, transform .35s var(--ease)}
.mb-dot.on{opacity:1;transform:scale(1)}

/* ── 세션 요약 ── */
.sheet{position:fixed;inset:0;z-index:40;display:none;align-items:flex-end;justify-content:center;background:var(--scrim)}
.sheet.on{display:flex}
.sheet .box{background:var(--bg);width:100%;max-width:560px;padding:28px 22px max(26px,env(safe-area-inset-bottom));animation:up .5s var(--ease) both;max-height:92vh;overflow:auto}
@keyframes up{from{transform:translateY(100%)}to{transform:none}}
.sum-top{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:18px}
.sum-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:2px solid var(--fg)}
.sum-grid > div{padding:14px 0;border-bottom:1px solid var(--line)}
.sum-grid > div:nth-child(odd){padding-right:12px}
.sum-grid .k{font-size:12.5px;color:var(--sub)}
.sum-grid .v{font-family:var(--display);font-weight:700;font-size:26px;line-height:1.2}
.sum-grid .v small{font-size:14px;color:var(--sub);font-weight:500}
.slow{margin-top:16px;font-size:14px;line-height:1.7}
.slow b{font-weight:700}
.sum-streak{display:flex;gap:12px;align-items:center;background:var(--soft);padding:12px 14px;margin-top:16px;font-weight:700;font-size:14px}

/* ── 기록 ── */
.seg{display:inline-flex;border:1.5px solid var(--fg)}
.seg button{padding:7px 13px;font-size:13px;font-weight:700}
.seg button + button{border-left:1.5px solid var(--fg)}
.seg button.on{background:var(--fg);color:var(--bg)}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:2px solid var(--fg)}
@media (max-width:620px){.stats{grid-template-columns:repeat(2,minmax(0,1fr))}}
.stat{padding:16px 14px 16px 0;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:6px;min-width:0}
.stat .k{font-size:12.5px;color:var(--sub);display:flex;align-items:center;gap:7px}
.stat .v{font-family:var(--display);font-weight:700;font-size:clamp(26px,5.5vw,34px);line-height:1}
.stat .v small{font-size:14px;font-weight:500;color:var(--sub);margin-left:2px}
.stat .d{font-size:12px;color:var(--sub)}
.stat .d.up{color:var(--blue)} .stat .d.down{color:var(--red)}
.block{display:flex;flex-direction:column;gap:12px}
.block-h{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.block-h h3{font-family:var(--display);font-size:17px;font-weight:700}
.scroll-x{overflow-x:auto;overflow-y:hidden;max-width:100%}
.cal{display:grid;grid-auto-flow:column;grid-template-rows:repeat(7,14px);gap:3px;width:max-content}
.cal i{width:14px;height:14px;background:var(--soft);outline:1px solid var(--line);outline-offset:-1px;animation:cell .27s var(--ease) both}
.cal i.p{background:var(--yellow);outline:0}
.cal i.ok{background:var(--blue);outline:0}
.cal i.t{outline:2px solid var(--fg);outline-offset:-2px}
.cal i.fut{visibility:hidden}
@keyframes cell{from{opacity:0;transform:scale(.4)}to{opacity:1;transform:none}}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:12px;color:var(--sub);align-items:center}
.legend i{display:inline-block;width:11px;height:11px;margin-right:6px;vertical-align:-1px}
svg text{font-family:var(--display);fill:var(--sub);font-size:11px}
.cap{font-size:13px;color:var(--sub);min-height:20px}
.cap b{color:var(--fg)}
.empty{border:1.5px dashed var(--line);padding:22px;text-align:center;color:var(--sub);font-size:14px}
.heat-cell{cursor:pointer;transition:opacity .2s;transform-box:fill-box;transform-origin:center}
.heat-cell:hover{opacity:.75}

/* ── 기타 입력 설정 ── */
.g-conn{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.g-conn select{height:44px;border:1.5px solid var(--fg);background:transparent;padding:0 10px;min-width:0;flex:1 1 220px;max-width:100%}
.meter{position:relative;height:14px;background:var(--soft);overflow:hidden}
.meter i{position:absolute;inset:0 auto 0 0;width:0;background:var(--blue)}
.meter b{position:absolute;top:0;bottom:0;width:2px;background:var(--yellow)}
.gsteps{display:flex;flex-direction:column}
.gstep{display:grid;grid-template-columns:34px minmax(0,1fr) auto auto;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}
.gstep .no{width:28px;height:28px;border:1.5px solid var(--fg);display:flex;align-items:center;justify-content:center;font-family:var(--display);font-weight:700;font-size:13px}
.gstep.done .no{background:var(--blue);border-color:var(--blue);color:#fff;border-radius:50%}
.gstep.act .no{background:var(--yellow);border-color:var(--yellow);color:var(--ink)}
.gstep .tx b{display:block;font-size:14.5px}
.gstep .tx span{font-size:12.5px;color:var(--sub)}
.dots{display:flex;gap:4px}
.dots i{width:9px;height:9px;background:var(--line)}
.dots i.f{background:var(--fg)}
@media (max-width:520px){.gstep{grid-template-columns:34px minmax(0,1fr) auto}.gstep .dots{grid-column:2}}
.gres{font-size:14px;line-height:1.7}
.warn{border-left:6px solid var(--red);padding:10px 14px;background:var(--soft);font-size:13.5px;line-height:1.6}
.good{border-left:6px solid var(--blue);padding:10px 14px;background:var(--soft);font-size:13.5px;line-height:1.6}
.live-ox{display:flex;align-items:center;gap:18px}
.live-ox .bx{width:84px;height:84px;display:flex;align-items:center;justify-content:center;font-family:var(--display);font-weight:800;font-size:46px;border:2px solid var(--line);color:var(--sub);flex:none}
.live-ox .bx.o{background:var(--blue);border-color:var(--blue);color:#fff;border-radius:50%}
.live-ox .bx.x{background:var(--red);border-color:var(--red);color:#fff}
.live-ox .bx.w{border-color:var(--yellow);color:var(--yellow)}
details.adv summary{list-style:none;display:inline-flex;align-items:center;justify-content:space-between;gap:16px;
  height:48px;padding:0 18px;border:1.5px solid var(--fg);font-weight:700;font-size:14.5px;cursor:pointer;min-width:min(100%,280px)}
details.adv summary:hover{background:var(--soft)}
details.adv summary::-webkit-details-marker{display:none}
details.adv summary .pm::before{content:"+";font-family:var(--display);font-size:20px;font-weight:500}
details.adv[open] summary .pm::before{content:"−"}
details.adv[open] summary{background:var(--fg);color:var(--bg)}
.lead{font-size:16.5px;line-height:1.7;color:var(--fg);font-weight:500;max-width:62ch;border-left:6px solid var(--blue);padding:2px 0 2px 16px}
.caution{background:var(--yellow);color:var(--ink);font-size:15px;font-weight:600;line-height:1.65;padding:16px 18px}
.sl{display:grid;grid-template-columns:minmax(0,1fr) 64px;gap:2px 10px;align-items:center;margin-top:12px}
.sl label{font-size:13px;font-weight:700}
.sl label span{display:block;font-weight:400;color:var(--sub);font-size:12px}
.sl output{font-family:var(--display);font-weight:600;text-align:right}
.sl input{grid-column:1/-1;width:100%;accent-color:var(--blue)}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

/* ── 사이트 요소: 언어 전환 · 소개 글 · 광고 칸 · 문서 페이지 ── */
h1.mark{font-size:15px;margin:0}
.langs{display:inline-flex;border:1.5px solid var(--fg)}
.langs a{font-family:var(--display);font-weight:600;font-size:12.5px;letter-spacing:.08em;padding:0 10px;height:34px;display:flex;align-items:center;color:var(--fg);text-decoration:none}
.langs a + a{border-left:1.5px solid var(--fg)}
.langs a[aria-current="page"]{background:var(--fg);color:var(--bg)}
.langs a:not([aria-current]):hover{background:var(--soft)}

/* 홈 아래 소개 글: 검색 노출용 고정 텍스트. 앱과 같은 그리드·글꼴 */
.about{border-top:2px solid var(--fg);padding-top:28px;margin-top:20px;display:flex;flex-direction:column;gap:26px;max-width:72ch}
.about h2{font-family:var(--display);font-size:22px;font-weight:700;line-height:1.25;text-wrap:balance}
.about h3{font-size:16px;font-weight:700;margin-bottom:6px}
.about p,.about li{font-size:15px;line-height:1.75;color:var(--fg)}
.about ol,.about ul{padding-left:1.3em;display:flex;flex-direction:column;gap:6px}
.about .faq{display:flex;flex-direction:column;gap:16px}
.about .faq div{border-left:4px solid var(--line);padding-left:14px}
.foot{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13px;color:var(--sub);padding:20px 0 6px;border-top:1px solid var(--line)}
.foot a{color:var(--sub)}

/* 광고 칸: 연습 화면에는 두지 않는다. 표시 문구로 콘텐츠와 구분 */
.ad{display:flex;flex-direction:column;gap:6px;min-height:0}
.ad[hidden]{display:none}
.ad .ad-label{font-family:var(--display);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--sub)}
.ad ins{display:block;min-height:100px}
.ad.demo .ad-box{height:120px;border:1.5px dashed var(--line);display:flex;align-items:center;justify-content:center;color:var(--sub);font-size:13px}

/* 개인정보처리방침 등 문서 페이지 */
body.doc{overflow:auto}
.doc main{max-width:72ch;margin:0 auto;padding:max(20px,env(safe-area-inset-top)) 20px 60px;display:flex;flex-direction:column;gap:22px}
.doc h1{font-family:var(--display);font-size:clamp(28px,6vw,38px);line-height:1.15;margin-top:12px}
.doc h2{font-size:18px;margin-top:10px;border-bottom:2px solid var(--fg);padding-bottom:6px}
.doc p,.doc li{font-size:15px;line-height:1.75}
.doc ul{padding-left:1.3em}
.doc a{color:var(--fg)}
.doc .meta{color:var(--sub);font-size:13px}

/* 줄바꿈: 한국어는 단어 단위(keep-all), 일본어는 띄어쓰기가 없으므로 글자 단위 + 금칙 처리 */
:root:lang(ja) body{word-break:normal;line-break:strict}