:root {
  --ink: #16151a;
  --ink-soft: #6d6b78;
  --ink-faint: #a3a1ac;
  --bg: #fdfbf8;
  --surface: #ffffff;
  --line: #ece8f2;
  --primary: #6c5ce7;
  --primary-deep: #5546c8;
  --primary-tint: #f2effe;
  --accent: #ffb37a;
  --radius: 18px;
  --wrap: 1080px;
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    system-ui, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
}

/* 일본어 추가 시: font-family 뒤에 "Noto Sans JP" 를 넣고 해당 폰트를 로드할 것 */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: -0.015em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  word-break: keep-all;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.sec__title {
  font-size: clamp(28px, 4.8vw, 46px);
  font-weight: 500;
  line-height: 1.34;
  letter-spacing: -0.035em;
  margin: 0 0 16px;
}

.sec__lead {
  color: var(--ink-soft);
  font-weight: 400;
  margin: 0 0 48px;
}

.br-m { display: none; }
@media (min-width: 640px) { .br-m { display: inline; } }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 24px;
  background: rgba(253, 251, 248, 0.82);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.04em;
  text-decoration: none;
}
.nav__brand img { border-radius: 8px; }

.nav__links { display: flex; gap: 22px; font-size: 15px; }
.nav__links a { color: var(--ink-soft); text-decoration: none; }
.nav__links a:hover { color: var(--primary); }
@media (max-width: 560px) { .nav__links a:first-child { display: none; } }

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: clamp(64px, 12vw, 140px) 0 clamp(56px, 10vw, 120px);
  background:
    radial-gradient(900px 420px at 78% -8%, #efeaff 0%, rgba(239, 234, 255, 0) 62%),
    radial-gradient(700px 380px at 6% 8%, #fff1e4 0%, rgba(255, 241, 228, 0) 60%);
}

.hero__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.hero__eyebrow {
  display: inline-block;
  margin: 0 0 22px;
  padding: 7px 15px;
  border-radius: 999px;
  background: var(--primary-tint);
  color: var(--primary-deep);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
}

.hero__title {
  margin: 0 0 24px;
  font-size: clamp(40px, 8.4vw, 82px);
  line-height: 1.2;
  letter-spacing: -0.045em;
  font-weight: 500;
}

.hero__sub {
  margin: 0 0 40px;
  max-width: 30em;
  font-size: clamp(16px, 2.2vw, 20px);
  font-weight: 400;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ---------- CTA + 모자이크 트윈미 ---------- */
.cta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding-bottom: 30px; /* 트윈미 아래 힌트 문구가 놓일 자리 */
}

.btn {
  font-family: inherit;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.02em;
  border: 0;
  border-radius: 999px;
  padding: 18px 34px;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.btn--primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 26px rgba(108, 92, 231, 0.28);
}
.btn--primary:hover { background: var(--primary-deep); transform: translateY(-2px); }
.btn--primary:active { transform: translateY(0); }
.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.cta__note {
  margin: 18px 0 0;
  font-size: 14px;
  color: var(--ink-faint);
}

/* 트윈미 — 기본은 모자이크로 가려진 상태 */
.twinme {
  position: relative;
  width: 108px;
  height: 108px;
  margin: 0;
  flex: none;
  cursor: pointer;
  user-select: none;
}

.twinme__img,
.twinme__mask {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 14px;
}

.twinme__mask {
  transition: opacity 0.55s ease, filter 0.55s ease, transform 0.55s ease;
  opacity: 1;
}

.twinme.is-revealed .twinme__mask {
  opacity: 0;
  filter: blur(6px);
  transform: scale(1.06);
  pointer-events: none;
}

.twinme.is-revealed .twinme__img {
  animation: pop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes pop {
  0%   { transform: scale(0.92); }
  60%  { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.twinme__hint {
  position: absolute;
  left: 50%;
  bottom: -26px;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-faint);
  transition: opacity 0.3s ease;
}
.twinme.is-revealed .twinme__hint { opacity: 0; }

/* 이미지가 아직 없을 때의 자리표시 */
.twinme.is-empty .twinme__img {
  background: repeating-linear-gradient(45deg, #efeaff, #efeaff 8px, #e3dcff 8px, #e3dcff 16px);
}

@media (prefers-reduced-motion: reduce) {
  .twinme__mask, .twinme__img { transition: none; animation: none; }
}

/* ---------- 핵심 가치 ---------- */
.value {
  padding: clamp(56px, 9vw, 96px) 0;
  text-align: center;
}
.value__title {
  font-size: clamp(26px, 5.2vw, 50px);
  font-weight: 500;
  line-height: 1.34;
  letter-spacing: -0.04em;
  margin: 0 0 22px;
}
.value__body {
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.7;
}

/* ---------- 기능 카드 ---------- */
.features { padding: clamp(48px, 8vw, 84px) 0; }

.cards {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .cards { grid-template-columns: repeat(2, 1fr); gap: 20px; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(29, 27, 38, 0.07);
}
.card__icon { font-size: 30px; line-height: 1; }
.card__title {
  margin: 16px 0 10px;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.035em;
}
.card__desc {
  margin: 0;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* ---------- 트윈미 소개 ---------- */
.twinme-intro {
  padding: clamp(48px, 8vw, 88px) 0;
  background: linear-gradient(180deg, #faf7ff 0%, #fdfbf8 100%);
}
.twinme-intro__inner {
  display: grid;
  gap: 36px;
  align-items: center;
}
@media (min-width: 820px) {
  .twinme-intro__inner { grid-template-columns: 320px 1fr; gap: 56px; }
}
.twinme-intro__art img { margin: 0 auto; max-width: 260px; }
.twinme-intro__art.is-empty {
  height: 220px;
  border-radius: var(--radius);
  background: repeating-linear-gradient(45deg, #efeaff, #efeaff 10px, #e6e0ff 10px, #e6e0ff 20px);
}
.twinme-intro__copy p {
  color: var(--ink-soft);
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.75;
}

/* ---------- 베타 참여 ---------- */
.beta { padding: clamp(48px, 8vw, 84px) 0; text-align: center; }

.steps {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  text-align: left;
}
.step {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.step__n {
  flex: none;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--primary-tint);
  color: var(--primary-deep);
  font-weight: 500;
  font-size: 14px;
}
.step p { margin: 0; font-size: 16px; }
.step b { font-weight: 600; }
.beta__note { margin: 0; font-size: 14px; color: var(--ink-faint); }

/* ---------- FAQ ---------- */
.faq { padding: clamp(48px, 8vw, 84px) 0; }

.qa {
  border-bottom: 1px solid var(--line);
  padding: 4px 0;
}
.qa:first-of-type { border-top: 1px solid var(--line); margin-top: 28px; }
.qa summary {
  cursor: pointer;
  list-style: none;
  padding: 24px 34px 24px 0;
  font-weight: 500;
  font-size: 18px;
  letter-spacing: -0.03em;
  position: relative;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 21px;
  font-weight: 400;
  color: var(--ink-faint);
}
.qa[open] summary::after { content: "−"; }
.qa p { margin: 0 0 24px; color: var(--ink-soft); font-size: 16px; line-height: 1.7; }
.qa b { font-weight: 600; color: var(--ink); }
.qa a { color: var(--primary-deep); }

/* ---------- 하단 CTA ---------- */
.cta-bottom {
  padding: clamp(56px, 9vw, 96px) 0;
  text-align: center;
  background:
    radial-gradient(760px 320px at 50% 0%, #efeaff 0%, rgba(239, 234, 255, 0) 66%);
}
.cta-bottom__title {
  margin: 0 0 30px;
  font-size: clamp(26px, 4.6vw, 44px);
  font-weight: 500;
  line-height: 1.34;
  letter-spacing: -0.04em;
}

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 40px 0 56px;
  background: var(--surface);
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  align-items: center;
  justify-content: space-between;
}
.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  letter-spacing: -0.04em;
}
.footer__brand img { border-radius: 7px; }
.footer__links { display: flex; flex-wrap: wrap; gap: 20px; font-size: 15px; }
.footer__links a { color: var(--ink-soft); text-decoration: none; }
.footer__links a:hover { color: var(--primary); }
.footer__meta { display: flex; align-items: center; gap: 14px; }
.footer__lang {
  font-size: 13px;
  color: var(--ink-faint);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
}
.footer__meta small { color: var(--ink-faint); font-size: 13px; }

/* ---------- 문서 페이지 (/support, /privacy, /terms 공용) ---------- */
.doc { padding: clamp(48px, 7vw, 92px) 0 clamp(56px, 8vw, 100px); }

.doc__head { margin: 0 0 clamp(36px, 5vw, 60px); }
.doc__eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
}
.doc__title {
  font-size: clamp(32px, 5.6vw, 56px);
  font-weight: 500;
  line-height: 1.24;
  letter-spacing: -0.04em;
  margin: 0 0 18px;
}
.doc__lead {
  margin: 0;
  max-width: 620px;
  color: var(--ink-soft);
  font-size: clamp(17px, 2vw, 19px);
  line-height: 1.7;
}

.doc__section { margin: 0 0 clamp(44px, 6vw, 72px); }
.doc__section:last-child { margin-bottom: 0; }
.doc__h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.35;
  margin: 0 0 20px;
}
.doc__p {
  margin: 0 0 16px;
  color: var(--ink-soft);
  line-height: 1.75;
}
.doc__p:last-child { margin-bottom: 0; }
.doc__p b { font-weight: 600; color: var(--ink); }
.doc__p a { color: var(--primary-deep); }

/* 문의 카드 */
.contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(24px, 3.5vw, 34px);
}
.contact__body { flex: 1 1 260px; }
.contact__label {
  margin: 0 0 6px;
  font-size: 14px;
  color: var(--ink-faint);
}
.contact__mail {
  display: inline-block;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color .18s ease, color .18s ease;
}
.contact__mail:hover { color: var(--primary-deep); border-color: var(--primary); }

/* 정보 목록 */
.doclist { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.doclist li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
}
.doclist dt, .doclist__k {
  flex: 0 0 132px;
  color: var(--ink-faint);
  font-size: 15px;
}
.doclist__v { flex: 1 1 260px; color: var(--ink-soft); line-height: 1.7; }
.doclist__v b { font-weight: 600; color: var(--ink); }

/* 안내 배너 */
.notice {
  margin-top: 28px;
  background: var(--primary-tint);
  border-radius: 14px;
  padding: 20px 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
}
.notice b { font-weight: 600; color: var(--ink); }

/* 되돌아가기 */
.doc__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: clamp(44px, 6vw, 72px);
  font-size: 15px;
  color: var(--ink-soft);
  text-decoration: none;
}
.doc__back:hover { color: var(--primary); }