/* ───────── 폰트 (자체 호스팅, 쓰는 글자만 서브셋 · 라이선스 SIL OFL 1.1 → assets/fonts/OFL-*.txt) ───────── */
@font-face { font-family: "Critters Display"; src: url("../assets/fonts/critters-display.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Critters Body"; src: url("../assets/fonts/critters-body-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Critters Body"; src: url("../assets/fonts/critters-body-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }

/* ───────── 색 토큰 (LANDING_SPEC.md 3-2, 앱 room.html에서 추출한 값 그대로) ───────── */
:root {
  --paper: #F7F4EE;
  --paper-warm: #F3DDB0;
  --ochre: #E9C98F;
  --ink: #1A1A1A;
  --city-grey: #3C3F45;
  --city-grey-light: #5B5F66;
  --green: #6F8F52;
  --green-soft: #8FAE6B;
  --clay: #C65B4E;   /* "채용" 도장 한 군데에만 */
  --lamp: #FFDD8A;

  /* 회색 구역 위 텍스트 (측정값은 README/QUESTIONS 참고) */
  --on-grey: var(--paper);          /* 9.62:1 */
  --on-grey-sub: #C9CCD1;           /* 6.56:1 */
  --on-grey-link: #A1BB83;          /* --green-soft를 16% 밝힘. 원래 값(#8FAE6B)은 4.24:1로 4.5 미달 → 5.0:1 */

  --display: "Critters Display", "Critters Body", "Malgun Gothic", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  --body: "Critters Body", "Malgun Gothic", "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif;
  --hand: 16px 11px 18px 11px / 11px 18px 11px 16px;  /* 손으로 그린 듯 살짝 어긋난 모서리 */
  --top-h: 68px;
  color-scheme: light;
}

/* ───────── 기본 ───────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; background: var(--paper); }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 16px/1.7 var(--body); font-synthesis: none;
  word-break: keep-all; overflow-wrap: break-word;
}
@media (min-width: 900px) { body { font-size: 17px; } }
h1, h2, h3 { font-family: var(--display); font-weight: 400; line-height: 1.2; margin: 0; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
ul, ol, dl, dd { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, video { max-width: 100%; }
[hidden] { display: none !important; }
.defs { position: absolute; }
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }
@media (min-width: 900px) { .wrap { padding: 0 32px; } }

a { color: inherit; text-decoration: underline; text-decoration-color: var(--green); text-decoration-thickness: 3px; text-underline-offset: 4px; }
a:hover { background: var(--green-soft); }
:focus-visible { outline: 3px solid var(--focus, var(--ink)); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: 12px; top: -80px; z-index: 10; background: var(--ink); color: var(--paper); padding: 10px 16px; border-radius: 8px; }
.skip:focus { top: 12px; }

/* ───────── 배경 구역: 따뜻한 실내 → 도시 회색 → 초록 → 따뜻한 실내 ───────── */
.z-room { background: var(--paper); --accent: var(--green); --focus: var(--ink); }
.z-warm { background: var(--paper-warm); --accent: var(--ink); --focus: var(--ink); }
.z-warm a { text-decoration-color: var(--ink); }
.z-green { background: var(--green-soft); --accent: var(--ink); --focus: var(--ink); }
.z-green a:hover { background: var(--paper); }
.z-grey { background: var(--city-grey); color: var(--on-grey); --accent: var(--on-grey-link); --focus: var(--paper); }
.z-grey a { color: var(--on-grey-link); text-decoration-color: var(--on-grey-link); }
.z-grey a:hover { background: transparent; color: var(--paper); }
#notify { --accent: var(--ink); }
#notify a { text-decoration-color: var(--ink); }  /* 노랑(--lamp) CTA가 있는 구역에는 초록을 섞지 않는다 */

.sec { padding: 56px 0; }
.sec.z-cont { padding-top: 0; }
@media (min-width: 900px) { .sec { padding: 96px 0; } .sec.z-cont { padding-top: 0; } }
.sec h2 { font-size: clamp(1.75rem, 6.4vw, 2.75rem); margin-bottom: 28px; }
.sec h2::after {   /* 손그림 물결 밑줄 */
  content: ""; display: block; width: 76px; height: 10px; margin-top: 12px; background: var(--accent);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 76 10'%3E%3Cpath d='M2 6 Q 11 0 19 5 T 36 5 T 53 5 T 74 4' fill='none' stroke='black' stroke-width='3.2' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 76 10'%3E%3Cpath d='M2 6 Q 11 0 19 5 T 36 5 T 53 5 T 74 4' fill='none' stroke='black' stroke-width='3.2' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat;
}
.lead { font-size: 1.125rem; max-width: 46ch; margin: -8px 0 32px; }

/* ───────── 헤더 ───────── */
.top { position: relative; z-index: 2; display: flex; align-items: center; min-height: var(--top-h); }  /* 투명: 히어로 광원이 헤더 뒤까지 이어진다 */
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { font: 400 1.25rem/1.2 var(--display); text-decoration: none; }
.brand:hover { background: transparent; }
.lang { display: flex; border: 2px solid var(--ink); border-radius: 12px; overflow: hidden; flex: none; }
.lang button {
  font: 700 0.875rem/1 var(--body); min-height: 44px; min-width: 44px; padding: 0 14px; border: 0;
  background: var(--paper); color: var(--ink); cursor: pointer;
}
.lang button + button { border-left: 2px solid var(--ink); }
.lang button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.lang button:focus-visible { outline-offset: -5px; }

/* ───────── 버튼 ───────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 54px; padding: 0 26px;
  font: 400 1.25rem/1.2 var(--display); text-decoration: none; text-align: center; cursor: pointer;
  color: var(--ink); background: var(--lamp); border: 3px solid var(--ink); border-radius: var(--hand);
  box-shadow: 4px 4px 0 var(--ink);
}
.btn:hover { background: var(--lamp); }
.btn:disabled { cursor: wait; opacity: .7; }
@media (prefers-reduced-motion: no-preference) {
  .btn { transition: transform .12s, box-shadow .12s; }
  .btn:hover { transform: translate(-1px, -1px); box-shadow: 6px 6px 0 var(--ink); }
  .btn:active { transform: translate(3px, 3px); box-shadow: 1px 1px 0 var(--ink); }
}

/* ───────── 1 히어로 ───────── */
.hero {
  margin-top: calc(var(--top-h) * -1); padding: calc(var(--top-h) + 8px) 0 44px;
  background:
    radial-gradient(48% 26% at 72% 66%, color-mix(in srgb, var(--lamp) 40%, transparent), transparent 58%),
    radial-gradient(40% 18% at 6% 2%, color-mix(in srgb, var(--lamp) 22%, transparent), transparent 55%),
    var(--paper);
}
.hero-grid { display: grid; gap: 14px; }
.eyebrow {
  display: inline-block; justify-self: start; font: 700 0.8125rem/1.4 var(--body); letter-spacing: .01em;
  padding: 3px 12px; border: 2px dashed var(--ink); border-radius: 999px; background: var(--paper); margin-bottom: 10px;
}
.hero h1 { font-size: clamp(2.1rem, 8.6vw, 4.25rem); line-height: 1.14; letter-spacing: -.005em; }
.hero .sub { margin-top: 10px; font-size: 1.0625rem; line-height: 1.5; max-width: 34em; }
.hero .btn { width: 100%; margin-top: 14px; }
.aux { margin-top: 8px; font-size: .9375rem; font-weight: 700; color: var(--city-grey); }
.stage { margin: 0; }
.screen {
  display: flex; flex-direction: column; background: var(--paper); border: 3px solid var(--ink);
  border-radius: var(--hand); box-shadow: 6px 6px 0 var(--ink); overflow: hidden;
}
.screen-bar { display: flex; gap: 6px; padding: 8px 12px; border-bottom: 3px solid var(--ink); background: var(--paper-warm); }
.screen-bar i { width: 11px; height: 11px; border: 2px solid var(--ink); border-radius: 50%; }
.slot-hero { margin: 12px; aspect-ratio: 16 / 10; }
.taskbar { display: flex; gap: 8px; align-items: center; padding: 0 12px; height: 34px; background: var(--city-grey); }
.taskbar i { width: 18px; height: 18px; border-radius: 4px; background: var(--paper); }
.taskbar i:nth-child(2) { background: var(--ochre); }
.taskbar i:last-child { margin-left: auto; width: 46px; height: 8px; border-radius: 99px; background: var(--on-grey-sub); }
.pc-note { font-size: .9375rem; padding: 10px 14px; border: 2px solid var(--ink); border-radius: var(--hand); background: var(--paper); font-weight: 700; }
@media (min-width: 900px) {
  .hero { padding: calc(var(--top-h) + 40px) 0 88px;
    background:
      radial-gradient(36% 48% at 76% 46%, color-mix(in srgb, var(--lamp) 40%, transparent), transparent 58%),
      radial-gradient(28% 28% at 4% 0%, color-mix(in srgb, var(--lamp) 20%, transparent), transparent 55%),
      var(--paper); }
  .hero-grid { grid-template-columns: 1.05fr 1fr; align-items: center; gap: 56px; }
  .hero .btn { width: auto; margin-top: 26px; }
  .hero .sub { font-size: 1.1875rem; margin-top: 20px; }
  .stage { transform: rotate(1.2deg); }
  .pc-note { display: none; }
}

/* ───────── 이미지 슬롯 ─────────
   그림 경로(config.assets)가 비면 슬롯에 hidden → 자리 전체가 빠진다. 히어로는 화면 틀째 숨기고 글만 가운데 정렬 */
.stage:has(.slot[hidden]) { display: none; }
.hero-grid:has(.slot-hero[hidden]) { grid-template-columns: 1fr; justify-items: center; text-align: center; max-width: 860px; }
.hero-grid:has(.slot-hero[hidden]) .eyebrow { justify-self: center; }
.hero-grid:has(.slot-hero[hidden]) .sub { margin-inline: auto; }
.step:has(> .slot[hidden])::before { position: static; margin-bottom: 12px; }
.slot {
  position: relative; display: grid; place-items: center; padding: 14px; text-align: center; overflow: hidden;
  background: repeating-linear-gradient(135deg, transparent 0 11px, color-mix(in srgb, var(--ochre) 55%, transparent) 11px 13px), var(--paper-warm);
  border: 2.5px dashed var(--ink); border-radius: var(--hand);
}
.slot:has(img, video) { padding: 0; border-style: solid; }
.slot img, .slot video { display: block; width: 100%; height: 100%; object-fit: cover; }

/* ───────── 카드 공통 ───────── */
.cards { display: grid; gap: 18px; counter-reset: c; }
.card { position: relative; padding: 22px 20px 24px; border-radius: var(--hand); counter-increment: c; }
.card::before { content: "0" counter(c); display: block; font: 400 1rem/1 var(--display); margin-bottom: 12px; letter-spacing: .08em; }
.card h3 { font-size: 1.5rem; margin-bottom: 10px; }
.card p + p { margin-top: 12px; }
@media (min-width: 900px) { .cards-3 { grid-template-columns: repeat(3, 1fr); gap: 24px; } .card { padding: 28px 26px 30px; } }

/* 2 문제 제기 (도시 회색) */
#problem .card { background: transparent; border: 2.5px solid var(--city-grey-light); color: var(--on-grey); }
#problem .card::before { color: var(--on-grey-sub); }

/* 4 근거 제시 (초록 구역) */
#proof .card { background: var(--paper); color: var(--ink); border: 3px solid var(--ink); box-shadow: 5px 5px 0 var(--ink); }
#proof .card::before { color: var(--city-grey); }

/* ───────── 3 해결 방법 ───────── */
.steps { display: grid; gap: 34px; counter-reset: s; }
.step { position: relative; counter-increment: s; }
.step::before {
  content: counter(s); position: absolute; z-index: 1; top: -14px; left: -6px; width: 46px; height: 46px; display: grid; place-items: center;
  font: 400 1.5rem/1 var(--display); color: var(--ink); background: var(--green); border: 3px solid var(--ink); border-radius: 50% 46% 52% 48%;
}
.step .slot { aspect-ratio: 16 / 10; margin-bottom: 14px; }
.step h3 { font-size: 1.625rem; margin-bottom: 6px; }
.notes { margin-top: 40px; display: grid; gap: 10px; }
.notes li { position: relative; padding-left: 32px; font-weight: 700; }
.notes li::before { content: ""; position: absolute; left: 4px; top: .55em; width: 14px; height: 14px; background: var(--green); border: 2.5px solid var(--ink); border-radius: 4px 6px 4px 6px; transform: rotate(-8deg); }
@media (min-width: 900px) { .steps { grid-template-columns: repeat(3, 1fr); gap: 32px; } .step .slot { aspect-ratio: 4 / 3; } .notes { grid-template-columns: repeat(2, auto); justify-content: start; gap: 12px 40px; } }

/* ───────── 5 채용 공고 ───────── */
.posting {
  position: relative; max-width: 660px; padding: 34px 22px 22px; background: var(--paper);
  border: 3px dashed var(--ink); border-radius: 6px; box-shadow: 7px 7px 0 var(--ochre);
}
.posting-tag { display: inline-block; font: 700 .8125rem/1.4 var(--body); padding: 1px 10px; background: var(--ink); color: var(--paper); border-radius: 4px; margin-bottom: 10px; }
.posting h3 { font-size: 1.75rem; margin-bottom: 14px; }
.posting-rows > div { display: grid; grid-template-columns: 6.2em 1fr; gap: 12px; padding: 10px 0; border-top: 2px dotted var(--ochre); }
.posting-rows dt { font-weight: 700; }
:lang(en) .posting-rows > div { grid-template-columns: 8.6em 1fr; }  /* Requirements가 두 줄로 꺾이지 않게 */
.stamp {   /* 텍스트 도장: 스크린리더가 "채용"을 읽는다. 질감은 SVG 필터. 프로젝트에서 --clay를 쓰는 유일한 곳 */
  position: absolute; top: -20px; right: 14px; transform: rotate(-9deg);
  font: 400 2.5rem/1 var(--display); letter-spacing: .08em; color: var(--clay);
  padding: 4px 8px 4px 16px; border: 4px double var(--clay); border-radius: 8px; filter: url(#stamp-rough); mix-blend-mode: multiply;
}
.world-body { display: grid; gap: 34px; }
.story { max-width: 62ch; padding-left: 16px; border-left: 4px solid var(--ochre); }
@media (min-width: 900px) { .posting { padding: 40px 34px 30px; } .posting h3 { font-size: 2.125rem; } .stamp { font-size: 3.25rem; right: 30px; top: -28px; } .story { font-size: 1.125rem; align-self: center; }
  .world-body { grid-template-columns: minmax(0, 660px) 1fr; gap: 64px; align-items: start; } }

/* ───────── 6 사원 명부 ───────── */
.roster { display: grid; gap: 20px; }
.crit { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; padding: 14px 14px 18px; background: var(--paper); border: 3px solid var(--ink); border-radius: var(--hand); box-shadow: 5px 5px 0 var(--ochre); }
.crit .slot { width: 100%; aspect-ratio: 16 / 10; }
.crit h3 { font-size: 1.625rem; }
.crit dl { width: 100%; font-size: .9375rem; }
.crit dl div { display: flex; gap: 10px; padding: 4px 0; border-top: 2px dotted var(--ochre); }
.crit dt { flex: none; width: 3.2em; font-weight: 700; }
.crit p { font-size: .9375rem; }
.badge { display: inline-block; font: 700 .8125rem/1.5 var(--body); padding: 1px 12px; color: var(--ink); background: var(--paper); border: 2px solid var(--ink); border-radius: 999px; }
.badge-on { background: var(--green); }   /* 근무 중 */
@media (min-width: 640px) { .roster { grid-template-columns: repeat(2, 1fr); } .crit .slot { aspect-ratio: 1; } }
@media (min-width: 1000px) { .roster { grid-template-columns: repeat(4, 1fr); gap: 24px; } }

/* ───────── 7 CTA ───────── */
.apply { max-width: 720px; margin: 0 auto; padding: 30px 22px; background: var(--paper); border: 3px solid var(--ink); border-radius: var(--hand); box-shadow: 8px 8px 0 var(--lamp), 8px 8px 0 3px var(--ink); }
.apply h2 { font-size: clamp(1.6rem, 6vw, 2.4rem); text-wrap: wrap; }
.apply .lead { margin: -6px 0 22px; }
form label { display: block; font-weight: 700; margin-bottom: 8px; }
.form-row { display: grid; gap: 12px; }
input[type="email"] { width: 100%; min-height: 56px; padding: 0 16px; font: 400 1.0625rem/1 var(--body); color: var(--ink); background: var(--paper); border: 3px solid var(--ink); border-radius: var(--hand); }
#form-status { margin-top: 12px; padding-left: 12px; font-weight: 700; border-left: 4px solid transparent; min-height: 1.7em; }
#form-status[data-state="ok"] { border-left-color: var(--green); }
#form-status[data-state="err"] { border-left: 4px dashed var(--ink); }
.fine { margin-top: 10px; font-size: .875rem; color: var(--city-grey); }
@media (min-width: 640px) { .apply { padding: 40px 44px; } .form-row { grid-template-columns: 1fr auto; } }

/* ───────── 8 FAQ ───────── */
.faq { max-width: 780px; border-top: 3px solid var(--ink); }
.faq details { border-bottom: 3px solid var(--ink); }
.faq summary { position: relative; min-height: 60px; padding: 16px 52px 16px 4px; font-weight: 700; font-size: 1.0625rem; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 8px; top: 50%; margin-top: -.6em; font: 400 1.75rem/1.2 var(--display); }
@media (prefers-reduced-motion: no-preference) { .faq summary::after { transition: transform .15s; } }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details > p { padding: 0 4px 18px; max-width: 62ch; }
.faq .faq-status { display: flex; flex-wrap: wrap; gap: 6px 8px; align-items: center; padding-top: 0; font-size: .9375rem; font-weight: 700; margin-top: -6px; }

/* ───────── 9 푸터 ───────── */
.foot { padding: 44px 0 52px; }
.foot-in { display: grid; gap: 28px; }
.foot-name { font: 400 1.5rem/1.2 var(--display); margin-bottom: 8px; }
.foot p { max-width: 44ch; }
.foot-maker { margin-top: 8px; color: var(--on-grey-sub); font-size: .9375rem; }
.foot-links { display: flex; flex-wrap: wrap; gap: 4px 22px; align-content: start; }
.foot-links a { display: inline-block; padding: 8px 0; }
@media (min-width: 900px) { .foot-in { grid-template-columns: 1fr auto; align-items: start; } .foot-links { flex-direction: column; gap: 0; } }

/* ───────── 개인정보 처리 안내 ───────── */
.doc { padding: 28px 0 72px; }
.doc .wrap { max-width: 760px; }
.doc .back { margin-bottom: 20px; }
.doc h1 { font-size: clamp(2rem, 7vw, 3rem); margin-bottom: 28px; }
.doc section { padding: 20px 0; border-top: 3px solid var(--ink); }
.doc h2 { font-size: 1.5rem; margin-bottom: 8px; }
.doc p + p { margin-top: 10px; }
.doc h3 { font-size: 1.1875rem; margin: 22px 0 8px; }
.doc .gap { margin-top: 18px; }
.doc .lang-note { margin-bottom: 14px; font-weight: 700; }
.doc .lang-note:empty { display: none; }
.doc-list { list-style: disc; padding-left: 1.3em; margin: 8px 0; }
.doc-list li + li { margin-top: 6px; }
.doc-list .doc-list { list-style: circle; margin-top: 6px; }
/* 표: 넓으면 표만 가로로 밀리고 페이지는 밀리지 않는다 (390px 가로 스크롤 금지) */
.table-wrap { max-width: 100%; overflow-x: auto; margin: 12px 0; }
.doc table { width: 100%; border-collapse: collapse; font-size: .9375rem; }
.doc th, .doc td { padding: 8px 10px; border: 2px solid var(--ink); text-align: left; vertical-align: top; overflow-wrap: anywhere; }
.doc thead th { background: var(--paper-warm); }
.doc tbody th { width: 30%; font-weight: 700; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

/* ───────── 배경 애니메이션 (3-3): 전부 배경 레이어, 콘텐츠 위로 오지 않음 ───────── */
.bg-peek, .bg-subway, .bg-grow { position: absolute; inset: 0; overflow: hidden; z-index: 0; }
.hero { position: relative; overflow: hidden; }
#problem, #proof { position: relative; }
.hero > .wrap, #problem > .wrap, #proof > .wrap { position: relative; z-index: 1; }

/* 히어로 — 동물이 하단에서 빼꼼 (화면 안에 있는 동안만 반복) */
.peek { position: absolute; bottom: -6px; width: 64px; height: auto; animation-play-state: paused; }
@media (min-width: 900px) { .peek { width: 92px; } }
.peek-a { left: 8%; animation: peek 6.4s ease-in-out infinite; }
.peek-b { left: 64%; animation: peek 8.6s ease-in-out infinite 1.6s; }
.peek-c { left: 37%; animation: peek 7.2s ease-in-out infinite 3.4s; display: none; }
.peek-d { left: 85%; animation: peek 9s ease-in-out infinite .8s; display: none; }
@media (min-width: 640px) { .peek-c, .peek-d { display: block; } }
.bg-loop.in-view .peek { animation-play-state: running; }
@keyframes peek {
  0%, 58%, 100% { transform: translateY(100%); }
  8%, 34% { transform: translateY(0); }
}

/* 도시 회색 구역 — 열차가 왼쪽 밖에서 들어와 감속하며 정차, 1회만.
   6-3: 섹션 맨 아래 선로 띠에 정차 (카드 아래 여백 = 열차 높이 + 바닥 간격만큼 확보) */
#problem { --sub-h: 62px; --sub-b: 20px; padding-bottom: calc(56px + var(--sub-h) + var(--sub-b)); }
@media (min-width: 900px) { #problem { --sub-h: 104px; --sub-b: 28px; padding-bottom: calc(80px + var(--sub-h) + var(--sub-b)); } }
.subway-svg {
  position: absolute; bottom: var(--sub-b); left: 0; width: 130vw; height: var(--sub-h);
  fill: none; stroke: var(--paper); stroke-width: 2; opacity: .32;
  transform: translateX(-150vw);
  transition: transform 2.4s cubic-bezier(.16, 1, .3, 1);
}
@media (min-width: 900px) { .subway-svg { width: 118vw; } }
/* 바퀴(viewBox y=82/90) 바로 아래 선로 한 줄. 열차와 같은 --paper 선·같은 불투명도, 움직이지 않음 */
.subway-rail { position: absolute; left: 0; right: 0; bottom: calc(var(--sub-b) + var(--sub-h) * 8 / 90 - 2px); border-top: 2px solid var(--paper); opacity: .32; }
.bg-subway.play .subway-svg { transform: translateX(-15vw); }

/* 초록 구역 — 풀숲·나무가 스크롤 시 한 번 솟아오름 (6-4 풀숲 띠).
   6-5: 띠는 섹션 폭 안에서 잘린다(overflow: hidden) → 가로 스크롤 없음. 카드 아래 여백 = 띠 높이 + 간격 */
#proof { --band: 108px; --s: .62; padding-bottom: calc(var(--band) + 32px); }
@media (min-width: 900px) { #proof { --band: 176px; --s: 1; padding-bottom: calc(var(--band) + 48px); } }
.bg-grow { inset: auto 0 0 0; height: var(--band); overflow: hidden; }
.grow-el {
  position: absolute; bottom: 0; transform-origin: bottom center;
  width: calc(var(--w) * var(--s) * 1px); height: calc(var(--h) * var(--s) * 1px);
  fill: none; stroke: var(--green); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round;
  opacity: 0; transform: translateY(30%) scaleY(.6);
  transition: transform .5s ease-out var(--d), opacity .5s ease-out var(--d);   /* 마지막 --d 700ms + .5s = 1.2s */
}
.grow-el:not(.tree) path { vector-effect: non-scaling-stroke; }
.grow-el.ground { left: 0; width: 100%; height: 14px; stroke-width: 2; }
@media (max-width: 899px) { .grow-el.d-only { display: none; } }
.bg-grow.play .grow-el { opacity: 1; transform: translateY(0) scaleY(1); }

@media (prefers-reduced-motion: reduce) {
  .peek { display: none; }
  .subway-svg, .grow-el { transition: none; }
  .subway-svg { transform: translateX(-15vw); }
  .grow-el { opacity: 1; transform: none; }
}