/* ============ masthead ============ */

.masthead {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 40;
  border-bottom: 1px solid transparent;
  transition: background-color 0.6s var(--ease-soft), border-color 0.6s var(--ease-soft);
}
.masthead.is-stuck {
  background: rgba(244, 239, 227, 0.97);
  backdrop-filter: blur(20px) saturate(1.1);
  border-bottom-color: var(--rule);
}
.masthead__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 78px;
  gap: 24px;
  transition: height 0.5s var(--ease-soft), padding 0.5s var(--ease-soft);
}
.mark { display: flex; align-items: baseline; gap: 12px; }
.mark__glyph {
  font-family: "Song Myung", var(--font-display-kr);
  font-weight: 700;
  font-size: 1.7rem;
  letter-spacing: -0.02em;
  transition: font-size 0.5s var(--ease-soft);
}
/* 2026-09-24 이름 변경(손결 SonGyeol): 영문 표기를 고정폭 글꼴·넓은 자간(0.32em)으로 두면
   "SonGyeol"의 끝 l이 숫자 1처럼 보이고 글자가 흩어져 두 음절(Son·Gyeol)이 안 읽혔다 → 세리프, 좁은 자간. */
.mark__latin {
  font-family: "Instrument Serif", var(--font-display-kr), serif;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  transition: font-size 0.5s var(--ease-soft);
}
.masthead__nav { display: flex; align-items: center; gap: clamp(16px, 2.2vw, 34px); }
/* :not(.btn) — the solid CTA button owns its own text color (.btn--solid, base.css) so it
   stays readable against its own fill; without this exclusion these plain-link rules win on
   specificity and paint the button's text a muted tone close to its gold fill (found 2026-09-14,
   boss reported "내 손결 기록하기" hard to read in the header on every page). */
.masthead__nav a:not(.btn) {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color 0.4s var(--ease-soft);
}
.masthead__nav a:not(.btn):hover { color: var(--accent); }
.masthead .btn { padding: 0.75em 1.4em; font-size: 0.86rem; }

/* the homepage hero carries the brand mark large — our "제목" — shrinking to the
   compact size above once the header sticks on scroll. Other pages keep the
   compact size throughout since they have no hero underneath the header. */
/* 2026-09-24: 예전 값 "padding: 18px 0"이 .shell의 좌우 여백(var(--gutter))까지 0으로 덮어써
   홈 첫 화면에서만 로고가 화면 왼쪽 끝에 붙어 있었다(v55 라이브에서도 확인) → 좌우 여백 유지. */
.masthead--dark-start:not(.is-stuck) .masthead__row { height: auto; padding: 18px var(--gutter); }
.masthead--dark-start:not(.is-stuck) .mark__glyph { font-size: clamp(2.8rem, 5.4vw, 4.8rem); }
.masthead--dark-start:not(.is-stuck) .mark__latin { font-size: clamp(1rem, 1.4vw, 1.35rem); }

/* while a dark hero sits directly under the transparent masthead, force light nav text —
   once the user scrolls (.is-stuck), the normal light-panel rules above take back over */
.masthead--dark-start:not(.is-stuck) .mark__glyph { color: #F4EFE3; }
.masthead--dark-start:not(.is-stuck) .mark__latin { color: rgba(244, 239, 227, 0.55); }
.masthead--dark-start:not(.is-stuck) .masthead__nav a:not(.btn) { color: rgba(244, 239, 227, 0.78); }
.masthead--dark-start:not(.is-stuck) .masthead__nav a:not(.btn):hover { color: var(--accent-soft); }
.masthead--dark-start:not(.is-stuck) .masthead__nav a.btn::before { border-color: rgba(244, 239, 227, 0.4); }

@media (max-width: 820px) {
  .masthead__nav a:not(.btn) { display: none; }
}

/* 2026-09-25 휴대폰 메뉴(assets/js/nav.js) — 넓은 화면에서는 숨기고, 820px 이하에서만 보인다 */
.masthead__menu { display: none; }
.site-menu { display: none; }
@media (max-width: 820px) {
  .masthead__nav { gap: 10px; }
  .masthead__menu {
    display: inline-flex; align-items: center; gap: 8px;
    min-height: 44px; padding: 0 12px;
    font: 600 0.86rem var(--font-body); color: var(--text);
    background: transparent; border: 1px solid var(--rule-strong); cursor: pointer;
  }
  .masthead__menu-icon { display: inline-flex; flex-direction: column; gap: 4px; }
  .masthead__menu-icon i { display: block; width: 16px; height: 1.5px; background: currentColor; transition: transform 0.3s var(--ease-soft), opacity 0.3s; }
  .masthead__menu[aria-expanded="true"] .masthead__menu-icon i:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
  .masthead__menu[aria-expanded="true"] .masthead__menu-icon i:nth-child(2) { opacity: 0; }
  .masthead__menu[aria-expanded="true"] .masthead__menu-icon i:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }
  .masthead--dark-start:not(.is-stuck):not(.menu-open) .masthead__menu { color: #F4EFE3; border-color: rgba(244, 239, 227, 0.4); }
  .masthead.menu-open { background: var(--page); border-bottom-color: var(--rule); }
  .masthead.menu-open .mark__glyph { color: var(--text); }
  .masthead.menu-open .mark__latin { color: var(--text-faint); }
  .site-menu:not([hidden]) {
    display: block; position: absolute; top: 100%; left: 0; right: 0;
    max-height: calc(100vh - 100%); overflow-y: auto;
    background: var(--page); border-bottom: 1px solid var(--rule); box-shadow: 0 18px 30px rgba(22, 25, 29, 0.18);
  }
  .site-menu ul { list-style: none; margin: 0; padding: 6px var(--gutter) 14px; }
  .site-menu li + li { border-top: 1px solid var(--rule); }
  .site-menu a { display: block; padding: 15px 2px; font: 600 1rem var(--font-body); color: var(--text); }
  .site-menu a:active { color: var(--accent); }
}
@media (max-width: 820px) {
  .masthead .btn { white-space: nowrap; padding: 0.8em 1em; font-size: 0.82rem; }   /* 버튼 글자가 세 줄로 접히지 않게 */
}
@media (max-width: 480px) {
  .mark__latin { display: none; }   /* 휴대폰 윗줄: 한글 로고·올리기 버튼·메뉴가 한 줄에 들어가도록 영문 표기는 뺀다(아래 푸터에는 그대로) */
}
@media (max-width: 350px) {
  .masthead__menu-label { display: none; }   /* 아주 좁은 화면은 아이콘만 */
}

/* ============ hero — the two sides, side by side ============ */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
  min-height: 100svh;
  padding-top: clamp(104px, 15vh, 176px);
  position: relative;
  z-index: 5;
}

.hero__copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(28px, 5vh, 56px) clamp(24px, 4vw, 66px) clamp(36px, 6vh, 72px) var(--gutter);
}

.hero__slate {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin-bottom: clamp(18px, 2.6vh, 30px);
}
.hero__slate span { position: relative; padding-left: 15px; }
.hero__slate span::before {
  content: "";
  position: absolute;
  left: 0; top: 0.55em;
  width: 6px; height: 1px;
  background: var(--accent-soft);
}

.hero__title {
  font-size: clamp(2.5rem, 5vw, 4.6rem);
  line-height: 1.14;
  margin-bottom: clamp(18px, 2.6vh, 30px);
  max-width: 22ch;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: clamp(24px, 3.4vh, 38px);
}

.hero__foot {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: clamp(28px, 5vh, 58px);
  padding-top: clamp(16px, 2vh, 24px);
  border-top: 1px solid var(--rule);
}
.scroll-cue__line {
  position: relative;
  width: 1px; height: 34px;
  background: var(--rule-strong);
  overflow: hidden;
}
.scroll-cue__line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent);
  animation: cue 2.6s var(--ease-soft) infinite;
}
@keyframes cue {
  0%   { transform: translateY(-100%); }
  60%  { transform: translateY(100%); }
  100% { transform: translateY(100%); }
}

.hero__media {
  position: relative;
  overflow: hidden;
  background: var(--dark-page);
}
.hero__plate { position: absolute; inset: 0; }
.hero__plate video,
.hero__plate img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 52% 52%;
  transform: scale(1.14);
  animation: plate-drift 16s var(--ease-soft) infinite alternate;
  filter: grayscale(0.3) contrast(1.22) brightness(0.6) saturate(0.78);
}
@keyframes plate-drift {
  0%   { transform: scale(1.14) translate3d(1.6%, 1%, 0); }
  50%  { transform: scale(1.05) translate3d(-1.2%, -0.6%, 0); }
  100% { transform: scale(1.16) translate3d(0.4%, -1.4%, 0); }
}
@media (prefers-reduced-motion: reduce) {
  .hero__plate video,
  .hero__plate img { animation: none; transform: scale(1.02); }
}

.hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(100deg, rgba(10, 11, 13, 0.65) 0%, rgba(10, 11, 13, 0.18) 30%, transparent 55%),
    radial-gradient(120% 85% at 25% 105%, rgba(0, 0, 0, 0.6) 0%, transparent 62%),
    radial-gradient(55% 70% at 88% 6%, rgba(0, 0, 0, 0.55) 0%, transparent 62%),
    linear-gradient(0deg, rgba(0, 0, 0, 0.32) 0%, transparent 22%);
}
.hero__media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: 0.28;
  background: radial-gradient(26% 36% at 80% 16%, rgba(224, 196, 137, 0.3), transparent 72%);
  animation: glint 9s var(--ease-soft) infinite alternate;
}
@keyframes glint {
  from { opacity: 0.14; transform: translate3d(0, 0, 0); }
  to   { opacity: 0.3; transform: translate3d(-1.5%, 1%, 0); }
}

#field {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  mix-blend-mode: screen;
}

.hero__caption {
  position: absolute;
  left: clamp(18px, 2vw, 30px);
  bottom: clamp(18px, 2vw, 30px);
  z-index: 3;
  color: rgba(244, 239, 227, 0.72);
  text-shadow: 0 1px 14px rgba(0, 0, 0, 0.85);
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero__media { min-height: 62vw; order: -1; }
  .hero__copy { padding: clamp(34px, 7vw, 56px) var(--gutter) clamp(40px, 7vw, 64px); }
  .hero__title { font-size: clamp(2.3rem, 7.8vw, 3.5rem); max-width: 17ch; }
  .masthead--dark-start:not(.is-stuck) .mark__glyph { font-size: clamp(2.2rem, 9vw, 3.2rem); }
}

/* ============ bands ============ */

.band {
  position: relative;
  z-index: 5;
  background: var(--page);
  color: var(--text);
  padding: clamp(66px, 8.5vw, 128px) 0;
}
.band--tight { padding: clamp(48px, 6vw, 84px) 0; }
.band--edge { border-top: 1px solid var(--rule); }

.band__head {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(22px, 4vw, 62px);
  align-items: start;
  margin-bottom: clamp(34px, 5vw, 72px);
}
.band__mark { display: flex; align-items: baseline; gap: 14px; margin-bottom: 16px; }
.band__mark .slate { color: var(--accent); font-size: 0.94rem; }

/* 2026-09-15 보스 지시: 각 섹션(01~05)의 소제목 옆 작은 설명 문단을 소제목과
   나란히 시작하지 않고 조금 아래로 내려서 배치 — 원래 "03 데이터 구매" 한 곳에만
   인라인 스타일로 줬던 것을 같은 구조(.band__head .lede)를 쓰는 모든 섹션에 공통 규칙으로 적용. */
.band__head .lede { margin-top: clamp(18px, 3vw, 38px); }

.section-title {
  font-size: clamp(1.5rem, 2.4vw, 2.25rem);
  line-height: 1.26;
  max-width: 17ch;
}
/* 2026-09-15 보스 지시: 소제목(h2) 바탕색을 살짝 그라데이션 있는 것으로 —
   히어로의 .chrome 효과처럼 화려하게(애니메이션 포함)는 아니고, 대부분은 기존
   글자색을 유지하다 끝부분만 살짝 accent 톤으로 번지는 정도로 절제해서 적용.
   reveal-line 줄넘김 구조상 각 줄(span)마다 그라데이션이 독립적으로 걸림. */
.section-title .reveal-line > span {
  background: linear-gradient(135deg, var(--text) 0%, var(--text) 62%, var(--accent-soft) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

@media (max-width: 820px) {
  .band__head { grid-template-columns: 1fr; }
}

/* ---- intro-lines: 03(데이터 구매) 리드 문단을 힘 있고 질서 정연하게 (2026-09-15) ---- */

.intro-lines {
  display: flex;
  flex-direction: column;
  gap: 11px;
  max-width: none;
  margin-top: clamp(18px, 3vw, 38px);
}
.intro-lines li {
  position: relative;
  padding-left: 24px;
  font-size: clamp(1.12rem, 1.3vw, 1.3rem);
  line-height: 1.5;
  font-weight: 400;
  color: var(--text-muted);
}
.intro-lines li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.72em;
  width: 14px; height: 2px;
  background: var(--accent);
}
.intro-lines li b { color: var(--text); font-weight: 600; }

/* ============ manifesto ============ */

.manifesto__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.manifesto__grid article {
  background: var(--page);
  padding: clamp(24px, 2.8vw, 40px) clamp(18px, 2vw, 30px);
}
.manifesto__grid h3 {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--accent);
}

@media (max-width: 820px) { .manifesto__grid { grid-template-columns: 1fr; } }

/* ============ duet ============ */

.duet {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--rule);
  position: relative;
  z-index: 5;
}
.duet__panel {
  position: relative;
  overflow: hidden;
  background: var(--page);
  min-height: clamp(360px, 48vw, 600px);
}
.duet__panel img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  filter: brightness(0.82);
  transform: scale(1.16);
  transition: filter 0.9s var(--ease);
}
.duet__panel:hover img { filter: brightness(1); }
.duet__panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(18, 20, 23, 0.94) 3%, rgba(18, 20, 23, 0.15) 52%, transparent 78%);
}
.duet__label {
  position: absolute;
  z-index: 2;
  left: clamp(18px, 2.6vw, 40px);
  right: clamp(18px, 2.6vw, 40px);
  bottom: clamp(20px, 2.6vw, 38px);
}
.duet__label h3 {
  font-family: var(--font-display-kr);
  font-weight: 700;
  font-size: clamp(1.25rem, 1.9vw, 1.7rem);
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}
.duet__panel--warm .duet__label h3 { color: var(--accent-pale); }
.duet__panel--cold .duet__label h3 { color: var(--data-soft); }

@media (max-width: 780px) {
  .duet { grid-template-columns: 1fr; }
  .duet__panel { min-height: 66vw; }
}

/* ============ everyday (2026-09-23) ============ */
/* 보스 지시: 손결의 뼈대 — 도구·상표가 아니라 일상의 평범한 손동작 전부를 받는다는 것을 실제 사진과 글로.
   사진은 실제 촬영본을 자르기만 한 것이라 필터를 걸지 않는다(duet 처럼 어둡게·확대하지 않음). */
.everyday {
  position: relative;
  z-index: 5;
  background: var(--page);
  color: var(--text);
  padding: clamp(66px, 8.5vw, 128px) 0;
  border-top: 1px solid var(--rule);
}
.everyday__strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 1.4vw, 20px);
}
.everyday__item figure { margin: 0; }
.everyday__item img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: var(--panel);
}
.everyday__item figcaption {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 14px;
}
.everyday__verb {
  font-family: var(--font-display-kr);
  font-weight: 700;
  font-size: clamp(1.3rem, 2vw, 1.75rem);
  letter-spacing: -0.03em;
  color: var(--accent-soft);
}
.everyday__statement {
  margin-top: clamp(34px, 5vw, 64px);
  max-width: 34em;
  font-size: clamp(1.12rem, 1.5vw, 1.4rem);
  line-height: 1.6;
  color: var(--text-muted);
}
.everyday__statement b { color: var(--text); font-weight: 600; }
.everyday__verbs {
  margin-top: 22px;
  font-family: var(--font-display-kr);
  font-size: clamp(1rem, 1.4vw, 1.25rem);
  line-height: 1.8;
  color: var(--text-faint);
  word-break: keep-all;
}
.everyday__source { margin-top: 26px; max-width: 60em; }

@media (max-width: 780px) {
  .everyday__strip { grid-template-columns: 1fr; gap: 26px; }
}

/* ============ graphic-break ============ */
/* 2026-09-15 보스 지시: "01 철학"-"02 절차" 사이의 사진(duet 섹션)처럼, 나머지
   소제목 사이(02-03, 03-04, 04-05)에도 같은 방식의 시각적 구분을 넣어달라는 요청.
   사진 생성은 외부 이미지 생성 툴의 유료 플랜이 필요해 보류하고(보스가 2안 선택),
   대신 이 사이트가 이미 쓰고 있는 라인아이콘 스타일(`assets/js/categories.js`과
   동일한 stroke 기반 미니멀 아이콘 문법)로 큼직한 그래픽 브레이크 3개를 만들었다. */
.graphic-break {
  position: relative;
  z-index: 5;
  padding: clamp(56px, 8vw, 108px) 0;
  background: var(--panel);
}
.graphic-break__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 22px;
}
.graphic-break__icon {
  width: clamp(96px, 11vw, 148px);
  height: auto;
  color: var(--accent);
}
.graphic-break__caption {
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 42ch;
  letter-spacing: 0;
  text-transform: none;
  font-weight: 400;
}

/* ---- 사진 브레이크 (2026-09-23 보스 지시: 02 아래 문장들에 보스가 받은 사진을 배치) ----
   기존 라인아이콘 브레이크(.graphic-break)를 그대로 두고, 사진을 깔고 문장을 그 위 왼쪽 아래에 얹는다.
   사진은 AI 연출 이미지라 오른쪽 위에 그렇게 표기한다(.graphic-break__credit). */
.graphic-break--photo {
  padding: 0;
  min-height: clamp(380px, 48vw, 640px);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--dark-page);
}
.graphic-break--photo .graphic-break__photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.16);
}
.graphic-break--photo::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(to top, rgba(18, 20, 23, 0.92) 0%, rgba(18, 20, 23, 0.45) 38%, rgba(18, 20, 23, 0) 72%);
}
.graphic-break--photo .graphic-break__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  align-items: flex-start;
  text-align: left;
  gap: 14px;
  padding-top: 120px;
  padding-bottom: clamp(30px, 4.4vw, 60px);
}
.graphic-break--photo .graphic-break__icon { width: 46px; color: var(--accent-soft); }
.graphic-break--photo .graphic-break__caption,
.graphic-break--mosaic .graphic-break__caption {
  font-family: var(--font-display-kr);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.3vw, 2rem);
  line-height: 1.42;
  letter-spacing: -0.03em;
  color: var(--text);
  max-width: 26ch;
  word-break: keep-all;
  text-wrap: balance;
}
.graphic-break__credit {
  position: absolute;
  z-index: 2;
  top: 14px;
  right: var(--gutter);
  font-size: 0.72rem;
  line-height: 1;
  padding: 5px 8px;
  background: rgba(18, 20, 23, 0.55);
  color: rgba(244, 239, 227, 0.78);
  letter-spacing: 0.02em;
}

/* 모자이크 — "어떤 분야의 손동작도" 문장에 네 분야 사진 */
.graphic-break--mosaic .graphic-break__inner { gap: 26px; }
.graphic-break--mosaic .graphic-break__caption { max-width: 30ch; }
.graphic-break--mosaic .graphic-break__credit { position: static; margin-top: -10px; background: none; padding: 0; color: var(--text-faint); }
.field-mosaic {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(8px, 1vw, 14px);
  width: 100%;
}
.field-mosaic li { position: relative; overflow: hidden; background: var(--dark-panel); }
.field-mosaic img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  transition: transform 0.9s var(--ease);
}
.field-mosaic li:hover img { transform: scale(1.04); }
.field-mosaic li::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to top, rgba(18, 20, 23, 0.78) 0%, rgba(18, 20, 23, 0) 42%);
}
.field-mosaic__verb {
  position: absolute;
  z-index: 1;
  left: 14px;
  bottom: 12px;
  font-family: var(--font-display-kr);
  font-weight: 700;
  font-size: clamp(1.05rem, 1.6vw, 1.4rem);
  letter-spacing: -0.03em;
  color: var(--accent-soft);
}

@media (max-width: 780px) {
  .field-mosaic { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  /* 휴대폰에서는 글이 손을 덮지 않게 사진 아래로 내린다 */
  .graphic-break--photo { display: block; min-height: 0; }
  .graphic-break--photo .graphic-break__photo {
    display: block;
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
  }
  .graphic-break--photo::after { display: none; }
  .graphic-break--photo .graphic-break__inner { padding-top: 24px; padding-bottom: 40px; }
}
@media (prefers-reduced-motion: reduce) {
  .graphic-break--photo .graphic-break__photo img { transform: none; }
}

/* ============ protocol ============ */

.protocol__list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.protocol__list li {
  background: var(--page);
  padding: clamp(26px, 3vw, 44px) clamp(18px, 2vw, 32px);
  transition: background-color 0.6s var(--ease-soft);
}
.protocol__list li:hover { background: var(--panel); }
.protocol__num {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  display: block;
  margin-bottom: 18px;
}
.protocol__list h3 {
  font-family: var(--font-display-kr);
  font-weight: 700;
  font-size: 1.22rem;
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}

@media (max-width: 780px) { .protocol__list { grid-template-columns: 1fr; } }

/* ============ buyers (dark crossing band) ============ */

.buyers { border-top: none; }
.spec {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.spec__cell {
  background: var(--page);
  padding: clamp(22px, 2.6vw, 38px) clamp(16px, 1.8vw, 28px);
}
.spec__key {
  display: block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.88rem;
  letter-spacing: 0.05em;
  color: var(--data);
  margin-bottom: 14px;
}
.spec__val {
  font-size: 1.06rem;
  line-height: 1.6;
  color: var(--text);
  margin-bottom: 8px;
}
.spec__note { font-size: 0.89rem; color: var(--text-faint); line-height: 1.6; }

.buyers__foot {
  margin-top: clamp(28px, 3.4vw, 48px);
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

/* buyer / provider distinction cards, sitting above the spec grid */
.party-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-bottom: clamp(28px, 3.4vw, 48px);
}
.party-card { background: var(--page); padding: clamp(24px, 2.8vw, 40px); }
.party-card__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}
.party-card__head h3 {
  font-family: var(--font-display-kr);
  font-weight: 700;
  font-size: clamp(1.15rem, 1.6vw, 1.4rem);
  letter-spacing: -0.03em;
}
.party-card--provider .party-card__head h3 { color: var(--accent); }
.party-card--buyer .party-card__head h3 { color: var(--data); }
.party-card__tag {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.party-card ul { display: flex; flex-direction: column; gap: 12px; }
.party-card li {
  position: relative;
  padding-left: 18px;
  font-size: 0.98rem;
  line-height: 1.66;
  color: var(--text-muted);
}
.party-card li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.68em;
  width: 6px; height: 1px;
  background: var(--accent-soft);
}
.party-card li b { color: var(--text); font-weight: 500; }
.party-card__cta { margin-top: 22px; }

@media (max-width: 820px) { .party-grid { grid-template-columns: 1fr; } }
@media (max-width: 900px) { .spec { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .spec { grid-template-columns: 1fr; } }

/* ============ payout (몫 계산) ============ */

.payout__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.35fr);
  gap: 1px;
  background: var(--rule);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.payout__formula,
.payout__steps { background: var(--page); padding: clamp(24px, 2.8vw, 40px); }
.payout__eq {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  line-height: 1.6;
  margin-top: 16px;
}
.payout__eq--sub { font-size: 0.92rem; color: var(--text-muted); margin-top: 10px; }
.payout__steps { counter-reset: pstep; }
.payout__steps li {
  counter-increment: pstep;
  position: relative;
  padding-left: 36px;
  margin-bottom: 13px;
  font-size: 1rem;
  line-height: 1.62;
  color: var(--text-muted);
}
.payout__steps li:last-child { margin-bottom: 0; }
.payout__steps li b { color: var(--text); font-weight: 500; }
.payout__steps li::before {
  content: counter(pstep);
  position: absolute; left: 0; top: 0;
  width: 23px; height: 23px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  border: 1px solid var(--rule-strong);
}
.payout__result {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: clamp(20px, 2.4vw, 32px);
}
.payout__result-cell { background: var(--page); padding: clamp(20px, 2.4vw, 32px); }
.payout__amount {
  font-family: var(--font-display-en);
  font-size: clamp(1.7rem, 2.8vw, 2.4rem);
  color: var(--accent);
  margin-top: 10px;
}

@media (max-width: 820px) {
  .payout__grid { grid-template-columns: 1fr; }
  .payout__result { grid-template-columns: 1fr; }
}

/* ---- payout explainer (2026-09-20, 클립·묶음·점수 합계 설명 접기) ---- */
.payout__explainer {
  margin-top: clamp(20px, 2.4vw, 32px);
  background: var(--panel);
  border: 1px solid var(--rule);
  padding: clamp(24px, 2.8vw, 40px);
  font-size: 0.92rem;
  color: var(--text-muted);
}
.payout__explainer summary {
  cursor: pointer;
  color: var(--accent);
  border-bottom: 1px solid currentColor;
  display: inline-block;
  font-size: 0.95rem;
}
.payout__explainer-body { margin-top: 18px; }
.payout__explainer-body p { margin-bottom: 14px; line-height: 1.7; }
.payout__explainer-body p:last-child { margin-bottom: 0; }
.payout__explainer-table {
  width: 100%;
  border-collapse: collapse;
  margin: 6px 0 16px;
  font-size: 0.87rem;
}
.payout__explainer-table th,
.payout__explainer-table td {
  padding: 9px 10px;
  border: 1px solid var(--rule);
  text-align: left;
}
.payout__explainer-table th {
  color: var(--text);
  font-weight: 500;
  background: var(--page);
}
.payout__explainer-table tfoot td {
  color: var(--text);
  background: var(--page);
}

@media (max-width: 600px) {
  .payout__explainer-table { font-size: 0.8rem; }
  .payout__explainer-table th,
  .payout__explainer-table td { padding: 7px 6px; }
}

/* ---- payout calculator (2026-09-15, 몫 계산기 인터랙티브 위젯) ---- */

.payout__calculator {
  margin-top: clamp(20px, 2.4vw, 32px);
  background: var(--panel);
  border: 1px solid var(--rule);
  padding: clamp(24px, 2.8vw, 40px);
}

.calc__head { margin-bottom: clamp(18px, 2vw, 26px); }

.calc__row { margin-bottom: 20px; }
.calc__label {
  display: block;
  font-size: 0.89rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.calc__toggles { display: flex; flex-wrap: wrap; gap: 8px; }

.calc-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 68px;
  padding: 10px 14px;
  font-family: var(--font-body);
  font-size: 0.92rem;
  color: var(--text-muted);
  background: var(--page);
  border: 1px solid var(--rule-strong);
  cursor: pointer;
  transition: background 0.3s var(--ease-soft), color 0.3s var(--ease-soft), border-color 0.3s var(--ease-soft);
}
.calc-toggle small { font-size: 0.76rem; color: inherit; opacity: 0.75; }
.calc-toggle:hover { border-color: var(--accent); }
.calc-toggle[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--page);
}

.calc__advanced {
  margin: 4px 0 22px;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.calc__advanced summary {
  cursor: pointer;
  color: var(--accent);
  border-bottom: 1px solid currentColor;
  display: inline-block;
}
.calc__fields {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 16px;
}
.calc__fields label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.calc__fields input,
.calc__sale {
  background: var(--page);
  border: 1px solid var(--rule-strong);
  padding: 8px 10px;
  font-size: 0.95rem;
  color: var(--text);
}

/* 2026-09-25: 판매액 칸을 접힌 칸 밖으로 — 손가락으로 누르기 쉽게 넉넉히 */
.calc__sale { display: block; width: 100%; max-width: 360px; padding: 12px 14px; font-size: 1.05rem; }
.calc__sale:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.calc__result {
  background: var(--page);
  padding: clamp(18px, 2.2vw, 28px);
  border: 1px solid var(--rule);
}

.calc__disclaimer { margin-top: 16px; }

@media (max-width: 600px) {
  .calc__fields { grid-template-columns: 1fr; }
}

/* ============ marquee ============ */

.marquee {
  position: relative;
  z-index: 5;
  display: flex;
  overflow: hidden;
  padding: clamp(20px, 2.4vw, 34px) 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background: var(--page);
  mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}
.marquee__track {
  display: flex;
  flex: none;
  align-items: center;
  gap: clamp(22px, 2.6vw, 44px);
  padding-right: clamp(22px, 2.6vw, 44px);
  animation: marquee 46s linear infinite;
}
.marquee:hover .marquee__track { animation-play-state: paused; }
@keyframes marquee {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-100%, 0, 0); }
}
.marquee__item {
  font-family: var(--font-display-kr);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.1vw, 1.85rem);
  letter-spacing: -0.03em;
  white-space: nowrap;
  color: transparent;
  -webkit-text-stroke: 1px var(--rule-strong);
}
.marquee__item--live {
  color: var(--accent);
  -webkit-text-stroke-color: transparent;
}
.marquee__dot {
  width: 4px; height: 4px;
  flex: none;
  background: var(--accent-soft);
  transform: rotate(45deg);
}

/* ============ fields stage ============ */

.stage {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(26px, 4vw, 62px);
  align-items: center;
}
.stage__icon {
  width: clamp(56px, 5.4vw, 78px);
  height: clamp(56px, 5.4vw, 78px);
  color: var(--accent);
  margin-bottom: 20px;
}
.stage__icon svg { width: 100%; height: 100%; }
.stage__name {
  font-family: var(--font-display-kr);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.2vw, 2rem);
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  padding: 0.5em 0.9em;
  border: 1px solid var(--rule-strong);
  color: var(--text-muted);
}
.badge--live { border-color: var(--data); color: var(--data); }
.badge__pip { width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
.badge--live .badge__pip { animation: pip 2.2s var(--ease-soft) infinite; }
@keyframes pip { 50% { opacity: 0.2; } }

.stage__ledger { border-top: 1px solid var(--rule); }
.stage__ledger button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 12px 0;
  background: none;
  border: none;
  border-bottom: 1px solid var(--rule);
  cursor: pointer;
  text-align: left;
  color: var(--text-faint);
  font-size: 0.92rem;
  transition: color 0.4s var(--ease-soft), padding-left 0.5s var(--ease);
}
.stage__ledger button:hover { color: var(--text); padding-left: 10px; }
.stage__ledger button[aria-selected="true"] { color: var(--accent); }
.stage__ledger button { font-size: 1rem; }

@media (max-width: 820px) { .stage { grid-template-columns: 1fr; } }

/* ============ status ============ */

.status__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.status__cell { background: var(--page); padding: clamp(22px, 2.6vw, 38px); }
.status__num {
  font-family: var(--font-display-en);
  font-size: clamp(2.3rem, 4.2vw, 3.6rem);
  line-height: 1;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
}
.status__cell .slate { display: block; }

@media (max-width: 780px) { .status__grid { grid-template-columns: 1fr; } }

/* ============ summon ============ */

.summon {
  position: relative;
  z-index: 5;
  overflow: hidden;
  padding: clamp(76px, 11vw, 168px) 0;
  text-align: center;
  background: var(--page);
}
.summon__plate { position: absolute; inset: 0; z-index: 0; }
.summon__plate img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  filter: brightness(0.42) saturate(0.85);
}
.summon__plate::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(88% 78% at 50% 50%, rgba(22, 25, 29, 0.42), var(--dark-page) 80%);
}
.summon__body { position: relative; z-index: 2; }
.summon__word {
  font-size: clamp(3rem, 9.2vw, 8.3rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
  margin-bottom: clamp(16px, 2.4vw, 28px);
}
.summon .lede { margin: 0 auto clamp(26px, 3.4vw, 40px); }

/* ============ footer ============ */

.footer {
  position: relative;
  z-index: 5;
  background: var(--page);
  border-top: 1px solid var(--rule);
  padding: clamp(30px, 3.4vw, 50px) 0;
}
.footer__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

/* 2026-09-17 사이트 전역 버그 수정 — 모바일에서 가로 스크롤이 생기던 원인.
   옛 규칙은 `flex: none` + `white-space: nowrap` 이라 푸터 링크 줄이 절대 접히지 않았다.
   390px 폭에서 문서 페이지 본문은 390px인데 문서 전체 스크롤 폭이 528~712px까지 벌어져,
   sell·buy·privacy·guide 등 푸터 링크가 많은 페이지마다 화면이 옆으로 밀렸다.
   (실측: guide.html 712px / sell·buy 664px / privacy 528px.)
   `nowrap` 은 링크 하나가 글자 중간에서 쪼개지지 않게 하려던 것이므로 **개별 링크로 옮기고**,
   줄 자체는 접히도록 `flex-wrap: wrap` 을 준다.
   `flex: none` 도 같이 걷어냈다 — 그게 남아 있으면 폭이 "내용 전체 폭(max-content)"으로 고정돼
   `flex-wrap: wrap` 을 줘도 접히지 않는다(실제로 upload.html 에서 그대로 재현됐다). */
.footer__nav { display: flex; flex-wrap: wrap; gap: 12px 18px; flex: 1 1 auto; min-width: 0; justify-content: flex-end; }
.footer__nav a {
  white-space: nowrap;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.86rem;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  transition: color 0.4s var(--ease-soft);
}
.footer__nav a:hover { color: var(--accent); }
/* 2026-09-25: 휴대폰에서 아래 링크 높이가 23px라 손가락으로 누르기 작았다 → 위아래 여백으로 누르는 영역만 넓힌다 */
@media (pointer: coarse), (max-width: 820px) {
  .footer__nav { gap: 2px 18px; }
  .footer__nav a { padding: 10px 0; }
}


/* ============ 2026-09-24 보강안: 첫 화면 "영상" 알리기 ============ */
.hero__kicker { color: var(--accent-soft, #C9A86A); margin-bottom: clamp(10px, 1.6vh, 18px); }
.hero__real {
  position: absolute; left: clamp(14px, 2vw, 24px); top: clamp(14px, 2vw, 24px); z-index: 3;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 11px; border-radius: 999px;
  background: rgba(10, 11, 13, 0.62); color: #F4EFE3;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.02em;
}
.hero__real i { width: 8px; height: 8px; border-radius: 50%; background: #E0483E; animation: rec-blink 1.6s steps(2, start) infinite; }
@keyframes rec-blink { to { visibility: hidden; } }
@media (prefers-reduced-motion: reduce) { .hero__real i { animation: none; } }
.hero__plate.is-real video { filter: none; transform: none; animation: none; object-position: 50% 55%; }
@media (max-width: 960px) {
  .hero__media.is-real { min-height: 92vw; }
  .hero-is-real .hero__caption { display: none; }
}

.howto { padding: clamp(40px, 6vw, 84px) 0; border-bottom: 1px solid var(--rule); }
.howto__grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr); gap: clamp(24px, 4vw, 64px); align-items: center; }
.howto__eyebrow { margin-bottom: 18px; }
.howto__steps { list-style: none; margin: 0; padding: 0; display: grid; gap: clamp(14px, 1.8vw, 22px); }
.howto__steps li { display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: start; }
.howto__steps h3 { margin: 2px 0 6px; font-size: clamp(1.15rem, 1.6vw, 1.35rem); }
.howto__steps .note { margin: 0; }
.howto__num {
  width: 38px; height: 38px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--accent, #8B6A2B); color: var(--accent, #8B6A2B); font-weight: 700;
}
.howto__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: clamp(22px, 3vw, 32px); }
.howto__clip { margin: 0; justify-self: center; width: min(100%, 300px); }
.howto__clip video {
  display: block; width: 100%; aspect-ratio: 9 / 16; object-fit: cover;
  border-radius: 12px; border: 1px solid var(--rule); background: #16191D;
}
.howto__clip figcaption { display: flex; flex-direction: column; gap: 4px; padding-top: 12px; }
.howto__clip figcaption a { color: var(--accent, #8B6A2B); font-size: 0.92rem; }
@media (max-width: 780px) {
  .howto__grid { grid-template-columns: 1fr; }
  .hero-is-real .howto__clip { display: none; }   /* 휴대폰 첫 화면에서 이미 같은 클립이 돈다 */
}

.everyday__item video.everyday__clip {
  display: block; width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover;
}

.hero__me { margin-top: 14px; }
.hero__me a { color: var(--accent-soft, #C9A86A); border-bottom: 1px solid currentColor; }