/* ================================================================
   경제뉴스 전자책 스토어 — 스타일시트
   색상/폰트 값은 :root 변수로 모아뒀습니다. 브랜드 톤을 바꾸고 싶으면
   아래 변수 값만 수정하면 사이트 전체에 반영됩니다.
   ================================================================ */

:root {
  /* 색상 토큰 */
  --paper: #F4F2EC;
  --card: #FCFBF8;
  --ink: #16181D;
  --sub: #54585F;
  --line: #E0DBCF;
  --line-strong: #C9C2B1;
  --green: #0B6B4B;
  --green-tint: #E4F0EA;
  --red: #BE3A38;
  --brass: #9A7B34;

  /* 폰트 */
  --font-head: "Black Han Sans", sans-serif;
  --font-body: "Pretendard", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "Space Mono", monospace;

  --radius: 4px;
  --shadow: 0 2px 0 rgba(22,24,29,0.04);
}

* { box-sizing: border-box; }

/* 화면에는 안 보이지만 스크린리더에는 읽히는 접근성 전용 텍스트 */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 제목 기본값은 Pretendard 굵게. Black Han Sans(검은고딕)는 임팩트가 필요한
   대형 타이틀(히어로 헤드라인, 섹션 타이틀, 표지 타이틀)에만 별도로 적용합니다.
   모든 제목에 검은고딕을 쓰면 반복되는 카드 제목마다 과하게 두꺼워 보이기 때문입니다. */
h1, h2, h3 { font-family: var(--font-body); font-weight: 800; line-height: 1.3; margin: 0; }

h1, .section-title { font-family: var(--font-head); font-weight: 400; }

p { margin: 0; }

a {
  color: inherit;
  text-decoration: none;
}

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

/* 키보드 포커스 표시 (접근성) */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--brass);
  outline-offset: 2px;
}

.section-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 72px 24px;
}

.section-title {
  font-size: clamp(24px, 3vw, 32px);
  margin-bottom: 8px;
}

.section-title--invert { color: var(--card); }

.section-desc {
  color: var(--sub);
  margin-bottom: 32px;
}

.section-desc code {
  font-family: var(--font-mono);
  background: var(--line);
  padding: 2px 6px;
  border-radius: 3px;
}

/* ----------------------------------------------------------------
   버튼
   ---------------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: transform 0.12s ease, background 0.12s ease;
}

.btn--small { padding: 8px 16px; font-size: 14px; }
.btn--large { padding: 14px 28px; font-size: 16px; }

.btn--primary {
  background: var(--green);
  color: var(--card);
}
.btn--primary:hover { background: #094f39; }
.btn--primary:active { transform: translateY(1px); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn--ghost:hover { background: var(--ink); color: var(--card); }

.btn--block { display: block; width: 100%; }

/* ----------------------------------------------------------------
   1. 티커테이프
   ---------------------------------------------------------------- */
.ticker {
  background: var(--ink);
  color: var(--card);
  overflow: hidden;
  white-space: nowrap;
  border-bottom: 1px solid #000;
}

.ticker__track {
  display: inline-flex;
  width: max-content;
  animation: ticker-scroll 32s linear infinite;
  padding: 10px 0;
}

@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.ticker__item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 0 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  border-right: 1px solid rgba(255,255,255,0.15);
  white-space: nowrap;
}

.ticker__label { color: #9AA0AC; font-weight: 700; }

/* BTC 항목에만 붙는 실시간 표시 뱃지 */
.ticker__live {
  font-size: 9px;
  font-weight: 700;
  color: var(--ink);
  background: #4CC38A;
  border-radius: 3px;
  padding: 1px 4px;
  letter-spacing: 0.03em;
}

/* USD/KRW처럼 하루 1회만 갱신되는 항목에 붙는 뱃지 (BTC의 LIVE와 구분) */
.ticker__daily {
  font-size: 9px;
  font-weight: 700;
  color: var(--card);
  background: #6B7280;
  border-radius: 3px;
  padding: 1px 4px;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.ticker__value { color: var(--card); }
.ticker__change--up { color: #4CC38A; }
.ticker__change--down { color: #E5726F; }

/* 모션 최소화 설정 존중: 티커 애니메이션 정지 */
@media (prefers-reduced-motion: reduce) {
  .ticker__track { animation: none; }
  .ticker { overflow-x: auto; }
}

/* ----------------------------------------------------------------
   2. 헤더
   ---------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(244,242,236,0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.header__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  font-family: var(--font-head);
  font-size: 22px;
  letter-spacing: -0.02em;
  margin-right: auto;
}

.nav {
  display: flex;
  gap: 28px;
  font-weight: 500;
  font-size: 15px;
}

.nav a:hover { color: var(--green); }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
}
.nav__toggle span {
  width: 22px;
  height: 2px;
  background: var(--ink);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 8px 24px 20px;
  border-top: 1px solid var(--line);
}
.mobile-nav[hidden] { display: none; }
.mobile-nav a {
  padding: 10px 0;
  font-weight: 500;
  border-bottom: 1px solid var(--line);
}
.mobile-nav .btn { margin-top: 12px; text-align: center; }

@media (max-width: 780px) {
  .nav { display: none; }
  .header__inner > .btn--primary { display: none; }
  .nav__toggle { display: flex; }
}

/* ----------------------------------------------------------------
   3. 히어로
   ---------------------------------------------------------------- */
.hero { padding: 80px 24px; }

.hero__inner {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 56px;
  align-items: center;
}

.hero__headline {
  font-size: clamp(32px, 5vw, 52px);
  letter-spacing: -0.01em;
}

.hero__headline .hi {
  color: var(--green);
  background: linear-gradient(transparent 68%, var(--green-tint) 68%);
  padding: 0 2px;
}

.hero__sub {
  margin-top: 20px;
  font-size: 17px;
  color: var(--sub);
  max-width: 46ch;
}

.hero__actions {
  margin-top: 32px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero__right { display: flex; justify-content: center; }

@media (max-width: 900px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__right { order: -1; }
}

/* ----------------------------------------------------------------
   4. 카테고리 스트립
   ---------------------------------------------------------------- */
.categories {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--card);
}

.categories__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.category-chip {
  font-weight: 600;
  font-size: 14px;
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink);
}

.category-chip em {
  font-style: normal;
  font-family: var(--font-mono);
  color: var(--sub);
  font-size: 11px;
  margin-left: 6px;
}

/* ----------------------------------------------------------------
   5. 신간 그리드 / 책 카드 (히어로 대표 카드와 공유하는 스타일)
   ---------------------------------------------------------------- */
.book-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 980px) {
  .book-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .book-grid { grid-template-columns: 1fr; }
}

.book-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.book-card__cover {
  position: relative;
  aspect-ratio: 3 / 4;
  display: flex;
  align-items: flex-end;
  padding: 20px;
  color: var(--card);
}

.book-card__cover-title {
  /* 표지는 책 커버처럼 보이는 그래픽 요소라, 여기서만 검은고딕을 다시 적용합니다. */
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 22px;
  line-height: 1.35;
}

/* 표지 색 변형: 이미지 없이 그라데이션 + 제목만으로 표지를 구성 */
.cover--ink   { background: linear-gradient(135deg, #16181D, #2b2f38); }
.cover--green { background: linear-gradient(135deg, #0B6B4B, #0e8a62); }
.cover--paper { background: linear-gradient(135deg, #C9C2B1, #F4F2EC); color: var(--ink); }
.cover--brass { background: linear-gradient(135deg, #9A7B34, #c79f4b); }

.book-card__badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--card);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
}

.book-card__body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.book-card__category {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--brass);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.book-card__title { font-size: 19px; }
.book-card__subtitle { font-size: 14px; color: var(--sub); }
.book-card__desc { font-size: 14px; color: var(--sub); margin-top: 4px; }

.book-card__footer {
  margin-top: auto;
  padding-top: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--line);
}

.book-card__price {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
}

.book-card__pages {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sub);
}

/* 히어로 대표 카드는 살짝 크게 */
.hero__right .book-card { max-width: 320px; width: 100%; }

/* ----------------------------------------------------------------
   6. 왜 우리인가
   ---------------------------------------------------------------- */
.why { background: var(--ink); color: var(--card); }

.why__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

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

.why__card {
  border-top: 2px solid var(--brass);
  padding-top: 20px;
}

.why__num {
  font-family: var(--font-mono);
  color: var(--brass);
  font-size: 14px;
}

.why__card h3 {
  font-size: 22px;
  margin: 8px 0 12px;
}

.why__card p {
  color: #C7CAD1;
  font-size: 15px;
}

/* ----------------------------------------------------------------
   7. 무료 샘플 폼
   ---------------------------------------------------------------- */
.sample { background: var(--green-tint); }

.sample__inner { max-width: 640px; text-align: left; }

.sample-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.sample-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  padding: 14px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15px;
  background: var(--card);
}

.sample-form__note {
  margin-top: 10px;
  font-size: 13px;
  color: var(--sub);
}

.sample-pending {
  padding: 20px;
  background: var(--card);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  color: var(--sub);
}

/* ----------------------------------------------------------------
   8. 푸터
   ---------------------------------------------------------------- */
.footer {
  background: var(--card);
  border-top: 1px solid var(--line);
}

.footer__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr;
  gap: 32px;
}

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

.footer__brand p {
  margin-top: 8px;
  color: var(--sub);
  font-size: 14px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
}
.footer__links a:hover { color: var(--green); }

.footer__business {
  font-size: 13px;
  color: var(--sub);
  line-height: 1.8;
}

.footer__business .biz-empty {
  font-style: normal;
  color: var(--sub);
}

.footer__copy {
  text-align: center;
  font-size: 12px;
  color: var(--sub);
  padding: 16px 24px 32px;
  border-top: 1px solid var(--line);
  max-width: 1120px;
  margin: 0 auto;
}