/* GMC 구독자 가이드 — 라이트 테마
   GMC 서비스 UI 문법 그대로: 오프화이트 배경 + 흰 카드 + 라임은 '형광펜/알약'으로만.
   (라임은 흰 배경에서 텍스트 색으로 쓰면 안 읽힘 → 반드시 채움색으로만 사용) */

:root {
  --bg: #f4f5f7;          /* GMC 메뉴 화면과 동일 계열 오프화이트 */
  --surface: #ffffff;
  --surface-2: #fbfbfc;
  --line: #e2e3e8;
  --line-soft: #ebecf0;
  --text: #101014;
  --text-dim: #5b5c66;
  --text-faint: #8e909b;
  --lime: #d3ff30;
  --lime-soft: #eeffb0;
  --ink: #101014;         /* 라임 위에 얹는 글자색 */

  --radius: 16px;
  --radius-pill: 999px;
  --maxw: 640px;
  --gutter: clamp(1.15rem, 0.7rem + 2.2vw, 2rem);

  --text-hero: clamp(2rem, 1.25rem + 4.2vw, 3.1rem);
  --text-h2: clamp(1.32rem, 1.05rem + 1.3vw, 1.7rem);

  --shadow-card: 0 1px 2px rgba(16, 16, 20, 0.04);
  --shadow-lift: 0 6px 20px rgba(16, 16, 20, 0.08);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --font: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo',
    system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 4.5rem; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.62;
  letter-spacing: -0.017em;
  word-break: keep-all;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(
    120% 50% at 12% -6%, rgba(211, 255, 48, 0.26), transparent 62%
  );
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.shell { max-width: var(--maxw); margin-inline: auto; padding: 0 var(--gutter); }

/* ───────── 히어로 ───────── */
.hero { padding: 3.4rem 0 2.4rem; }
.eyebrow {
  display: inline-flex; align-items: center;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.01em;
  color: var(--ink); background: var(--lime);
  padding: 0.3rem 0.72rem; border-radius: var(--radius-pill);
  margin-bottom: 1.25rem;
}
.hero h1 {
  font-size: var(--text-hero);
  font-weight: 800; line-height: 1.13; letter-spacing: -0.035em;
}
/* 라임 형광펜 — GMC 카드뉴스 문법 */
.hero h1 em {
  font-style: normal;
  background: linear-gradient(transparent 58%, var(--lime) 58%);
  padding: 0 0.06em;
}
.hero p {
  margin-top: 1.05rem; max-width: 30ch;
  color: var(--text-dim); font-size: 1.02rem;
}
.hero .readtime {
  margin-top: 1.6rem; font-size: 0.74rem; color: var(--text-faint);
}

/* ───────── 섹션 내비 (sticky) ───────── */
.navbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(244, 245, 247, 0.86);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.navbar .scroller {
  max-width: var(--maxw); margin-inline: auto;
  display: flex; gap: 0.4rem; overflow-x: auto;
  padding: 0.6rem var(--gutter);
  scrollbar-width: none;
}
.navbar .scroller::-webkit-scrollbar { display: none; }
.navbar a {
  flex: 0 0 auto;
  font-size: 0.775rem; font-weight: 600; letter-spacing: -0.025em;
  color: var(--text-dim); text-decoration: none;
  padding: 0.34rem 0.72rem; border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease),
    background 0.18s var(--ease);
}
.navbar a:hover, .navbar a:focus-visible {
  color: var(--text); border-color: var(--line); background: var(--surface);
}

/* ───────── 섹션 공통 ───────── */
section { padding: 3.6rem 0 0.4rem; }
section:last-of-type { padding-bottom: 1rem; }
.kicker {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.09em;
  color: var(--text-faint); text-transform: uppercase;
  margin-bottom: 0.6rem;
}
h2 {
  font-size: var(--text-h2);
  font-weight: 800; line-height: 1.24; letter-spacing: -0.035em;
}
.lede { margin-top: 0.72rem; color: var(--text-dim); font-size: 0.95rem; }
.lede strong, .step p .hl { color: var(--text); font-weight: 700; }

/* ───────── 소개: 스탯 ───────── */
.stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem; margin-top: 1.5rem;
}
.stat {
  background: var(--surface); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 0.95rem 0.85rem;
  box-shadow: var(--shadow-card);
}
.stat b {
  display: block; font-size: 1.32rem; font-weight: 800;
  letter-spacing: -0.045em; line-height: 1.1;
}
.stat span {
  display: block; margin-top: 0.28rem;
  font-size: 0.7rem; color: var(--text-faint); letter-spacing: -0.02em;
}
.pull {
  margin-top: 1.5rem; padding: 0 0 0 1.05rem;
  border-left: 3px solid var(--lime);
  font-size: 1.02rem; font-weight: 700; letter-spacing: -0.03em; line-height: 1.5;
}
.pull small {
  display: block; margin-top: 0.4rem;
  font-size: 0.8rem; font-weight: 500; color: var(--text-faint);
}

/* ───────── 배지 ───────── */
.badge {
  flex: 0 0 auto;
  font-size: 0.66rem; font-weight: 700; letter-spacing: -0.01em;
  padding: 0.16rem 0.5rem; border-radius: var(--radius-pill);
  white-space: nowrap;
}
.badge.open { color: var(--ink); background: var(--lime); }
.badge.free { color: var(--text-dim); background: var(--surface); border: 1px solid var(--line); }

/* ───────── 지금 볼 수 있는 것 ───────── */
.access { margin-top: 1.5rem; display: grid; gap: 0.5rem; }
.access a {
  display: grid; grid-template-columns: 1fr auto; align-items: center;
  gap: 0.35rem 0.8rem;
  text-decoration: none; color: inherit;
  background: var(--surface); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 0.9rem 1rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}
.access a:hover {
  border-color: var(--text); transform: translateY(-1px); box-shadow: var(--shadow-lift);
}
.access b { font-size: 0.95rem; font-weight: 700; letter-spacing: -0.03em; }
.access p { grid-column: 1 / -1; font-size: 0.83rem; color: var(--text-dim); }

/* ───────── 스텝 (번호를 마진에 걸기) ───────── */
.steps { margin-top: 1.9rem; counter-reset: step; }
.step {
  position: relative;
  padding: 1.6rem 0 1.7rem 3.4rem;
  border-top: 1px solid var(--line);
}
.step:first-child { border-top: none; padding-top: 0.4rem; }
.step::before {
  counter-increment: step;
  content: '0' counter(step);
  position: absolute; left: 0; top: 1.45rem;
  font-size: 1.62rem; font-weight: 800; letter-spacing: -0.06em;
  /* 라이트 배경에서 아웃라인은 거의 안 보임 → 저채도 솔리드로 */
  color: rgba(16, 16, 20, 0.2);
}
.step:first-child::before { top: 0.28rem; }
.step h3 {
  font-size: 1.06rem; font-weight: 700; letter-spacing: -0.035em;
  display: flex; align-items: baseline; gap: 0.5rem; flex-wrap: wrap;
}
.step h3 .min {
  font-size: 0.68rem; font-weight: 600; color: var(--text-dim);
  border: 1px solid var(--line); border-radius: var(--radius-pill);
  padding: 0.1rem 0.45rem; letter-spacing: 0;
}
.step p { margin-top: 0.55rem; color: var(--text-dim); font-size: 0.93rem; }
.step .tip {
  margin-top: 0.6rem; font-size: 0.8rem; color: var(--text-faint);
  padding-left: 0.7rem; border-left: 2px solid var(--line);
}

/* ───────── 앱처럼 쓰기: 기기별 토글 ───────── */
.install { margin-top: 0.9rem; display: grid; gap: 0.45rem; }
.install details {
  background: var(--surface); border: 1px solid var(--line-soft);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s var(--ease);
}
.install details[open] { border-color: var(--text); }
.install summary {
  list-style: none; cursor: pointer;
  display: flex; align-items: center; gap: 0.5rem;
  padding: 0.72rem 0.9rem;
  font-size: 0.86rem; font-weight: 700; letter-spacing: -0.03em;
}
.install summary::-webkit-details-marker { display: none; }
.install summary::before {
  content: ''; width: 7px; height: 7px; flex: 0 0 auto;
  border-right: 1.6px solid var(--text-faint); border-bottom: 1.6px solid var(--text-faint);
  transform: rotate(-45deg); margin-left: 0.1rem;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}
.install details[open] summary::before { transform: rotate(45deg); border-color: var(--text); }
.install summary em {
  font-style: normal; margin-left: auto;
  font-size: 0.72rem; font-weight: 600; color: var(--text-faint);
}
.install img { display: block; width: 100%; height: auto; border-top: 1px solid var(--line-soft); }

/* ───────── 버튼 ───────── */
.cta {
  display: inline-flex; align-items: center; gap: 0.42rem;
  margin-top: 0.95rem;
  font-size: 0.84rem; font-weight: 700; letter-spacing: -0.025em;
  color: #fff; background: var(--ink);
  padding: 0.62rem 1.05rem; border-radius: var(--radius-pill);
  text-decoration: none;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease),
    background 0.2s var(--ease), color 0.2s var(--ease);
}
.cta:hover {
  transform: translateY(-1px);
  background: var(--lime); color: var(--ink);
  box-shadow: var(--shadow-lift);
}
.cta:active { transform: translateY(0); }
.cta.ghost {
  color: var(--text); background: var(--surface);
  border: 1px solid var(--line);
}
.cta.ghost:hover { background: var(--lime); border-color: var(--lime); color: var(--ink); }
.cta .arw { transition: transform 0.2s var(--ease); }
.cta:hover .arw { transform: translateX(2px); }

/* ───────── 루틴 타임라인 ───────── */
.routine { margin-top: 1.7rem; position: relative; }
.routine::before {
  content: ''; position: absolute; left: 5.5px; top: 10px; bottom: 10px;
  width: 1.5px; background: linear-gradient(#c9ccd6, rgba(201, 204, 214, 0));
}
.slot { position: relative; padding: 0 0 1.45rem 1.85rem; }
.slot::before {
  content: ''; position: absolute; left: 0; top: 6px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--surface); box-shadow: 0 0 0 2px #b9bcc8;
}
.slot.now::before { background: var(--lime); box-shadow: 0 0 0 2px var(--ink); }
.slot .when {
  font-size: 0.74rem; font-weight: 700; letter-spacing: -0.02em;
  color: var(--text-dim);
}
.slot b { display: block; margin-top: 0.15rem; font-size: 0.98rem; font-weight: 700; letter-spacing: -0.03em; }
.slot p { margin-top: 0.22rem; font-size: 0.88rem; color: var(--text-dim); }

.note {
  margin-top: 0.6rem;
  background: var(--surface); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 0.9rem 1rem;
  font-size: 0.86rem; color: var(--text-dim);
  box-shadow: var(--shadow-card);
}
.note b { color: var(--text); font-weight: 700; }
.note a { color: var(--text); }

/* ───────── 상황별 사용법 ───────── */
.match { margin-top: 1.6rem; border-top: 1px solid var(--line); }
.match-row {
  display: grid; grid-template-columns: 1fr auto; gap: 0.6rem 1rem;
  align-items: center;
  padding: 0.95rem 0; border-bottom: 1px solid var(--line);
}
.match-row .q { font-size: 0.9rem; font-weight: 600; letter-spacing: -0.03em; }
.match-row .a {
  font-size: 0.79rem; font-weight: 700; letter-spacing: -0.02em;
  color: var(--text); text-decoration: none; white-space: nowrap;
  box-shadow: inset 0 -0.42em 0 var(--lime-soft);   /* 라임 형광펜 밑줄 */
  transition: box-shadow 0.18s var(--ease);
}
.match-row .a:hover { box-shadow: inset 0 -0.9em 0 var(--lime); }

/* ───────── 시리즈 카드 ───────── */
.series { margin-top: 1.6rem; display: grid; gap: 0.55rem; }
.series a {
  display: block; text-decoration: none; color: inherit;
  background: var(--surface); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 1rem 1.05rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}
.series a:hover { border-color: var(--text); transform: translateY(-1px); box-shadow: var(--shadow-lift); }
.series .tag {
  font-size: 0.7rem; font-weight: 700; color: var(--text-faint); letter-spacing: -0.01em;
  display: flex; align-items: center; gap: 0.4rem;
}
.series b { display: block; margin-top: 0.25rem; font-size: 0.95rem; font-weight: 700; letter-spacing: -0.03em; }
.series p { margin-top: 0.28rem; font-size: 0.84rem; color: var(--text-dim); }

/* ───────── FAQ ───────── */
.faq { margin-top: 1.5rem; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none; cursor: pointer;
  padding: 1rem 1.6rem 1rem 0; position: relative;
  font-size: 0.92rem; font-weight: 600; letter-spacing: -0.03em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ''; position: absolute; right: 0.25rem; top: 1.32rem;
  width: 8px; height: 8px;
  border-right: 1.6px solid var(--text-faint); border-bottom: 1.6px solid var(--text-faint);
  transform: rotate(45deg); transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}
.faq details[open] summary::after { transform: rotate(-135deg); border-color: var(--text); }
.faq .ans { padding: 0 0 1.05rem; font-size: 0.88rem; color: var(--text-dim); }
.faq .ans strong { color: var(--text); }
.faq .ans a {
  color: var(--text); font-weight: 600; text-decoration: none;
  box-shadow: inset 0 -0.42em 0 var(--lime-soft);
}
.faq .ans a:hover { box-shadow: inset 0 -0.9em 0 var(--lime); }

/* ───────── 마무리 CTA ───────── */
.closer {
  margin-top: 3.4rem;
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(211, 255, 48, 0.55), transparent 58%),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 1.8rem 1.5rem;
  box-shadow: var(--shadow-card);
}
.closer b { font-size: 1.16rem; font-weight: 800; letter-spacing: -0.04em; line-height: 1.3; display: block; }
.closer p { margin-top: 0.5rem; font-size: 0.88rem; color: var(--text-dim); }

/* ───────── 푸터 ───────── */
footer { margin-top: 2.6rem; padding: 1.8rem 0 4rem; border-top: 1px solid var(--line); }
footer .row { display: flex; gap: 1.1rem; flex-wrap: wrap; }
footer a { font-size: 0.8rem; color: var(--text-dim); text-decoration: none; transition: color 0.18s var(--ease); }
footer a:hover { color: var(--text); }
footer .contact { margin-top: 1rem; font-size: 0.8rem; color: var(--text-dim); }
footer .contact b { color: var(--text); font-weight: 600; }
footer .disclaimer { margin-top: 1.3rem; font-size: 0.7rem; line-height: 1.65; color: var(--text-faint); }

/* ───────── 스크롤 리빌 ───────── */
.reveal { opacity: 0; transform: translateY(14px); }
.reveal.in { opacity: 1; transform: none; transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .reveal.in { opacity: 1; transform: none; transition: none; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 6px; }

@media (max-width: 380px) {
  .stats { grid-template-columns: 1fr 1fr; }
  .stats .stat:last-child { grid-column: span 2; }
  .match-row { grid-template-columns: 1fr; align-items: start; }
  .match-row .a { justify-self: start; }
}