/* ==========================================================
   이유영어도서관이유어학원 - 랜딩페이지 스타일
   Design ref: Toss / Linear 스타일. White base + Green/Lime point
========================================================== */

:root{
  --color-bg: #ffffff;
  --color-bg-soft: #f7f9f7;
  --color-text: #17181c;
  --color-text-sub: #5b5f5a;
  --color-text-mute: #8a8f89;
  --color-border: #e7ebe6;

  --color-primary: #8a9a4e;      /* 메인 컬러 - 톤다운 라임 */
  --color-primary-dark: #6c7a3c;
  --color-primary-soft: #f0f2e4;
  --color-lime: #b7c17e;         /* 포인트 라임 (톤다운) */

  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;

  --shadow-card: 0 4px 20px rgba(20, 30, 20, 0.05);
  --shadow-card-hover: 0 10px 30px rgba(20, 30, 20, 0.09);

  --max-width: 1140px;
}

*{ box-sizing: border-box; margin: 0; padding: 0; }

html{ scroll-behavior: smooth; }

body{
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 76px; /* mobile sticky cta 공간 확보 */
}

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

a{ text-decoration: none; color: inherit; }
ul{ list-style: none; }

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

.pc-only{ display: none; }

/* ---------- Top Nav ---------- */
.top-nav{
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.nav-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand-logo{
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.2px;
}
.brand-logo strong{ color: var(--color-primary-dark); }
.nav-cta{
  font-size: 14px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--color-primary);
  color: #ffffff;
  white-space: nowrap;
}

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  border-radius: var(--radius-sm);
  padding: 16px 24px;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  cursor: pointer;
  border: none;
  text-align: center;
}
.btn-primary{
  background: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(138,154,78,0.28);
}
.btn-primary:hover{ background: var(--color-primary-dark); transform: translateY(-2px); }

.btn-secondary{
  background: #ffffff;
  color: var(--color-primary-dark);
  border: 1.5px solid var(--color-primary);
}
.btn-secondary:hover{ background: var(--color-primary-soft); transform: translateY(-2px); }

.btn-block{
  display: flex;
  width: 100%;
  margin-top: 20px;
  background: var(--color-primary);
  color: #ffffff;
}
.btn-block:hover{ background: var(--color-primary-dark); }

/* ---------- Hero ---------- */
.hero{
  padding: 72px 0 56px;
  background: linear-gradient(180deg, var(--color-primary-soft) 0%, #ffffff 78%);
}
.hero-inner{ text-align: center; }

.badge{
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary-dark);
  background: #ffffff;
  border: 1px solid var(--color-primary);
  border-radius: 999px;
  padding: 8px 16px;
  margin-bottom: 22px;
}

.hero-title{
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.4;
  margin-bottom: 20px;
  color: var(--color-text);
}

.hero-desc{
  font-size: 15px;
  color: var(--color-text-sub);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-cta-group{
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 420px;
  margin: 0 auto;
}
.hero-cta-group .btn{ flex: 1; }

.hero-subnote{
  margin-top: 18px;
  font-size: 13px;
  color: var(--color-text-mute);
}

/* ---------- Section common ---------- */
.section{ padding: 64px 0; }
.section:nth-of-type(odd){ background: var(--color-bg); }

.eyebrow{
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
  text-align: center;
}

.section-title{
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.4px;
  text-align: center;
  line-height: 1.45;
  margin-bottom: 16px;
  color: var(--color-text);
}

.section-desc{
  font-size: 15px;
  color: var(--color-text-sub);
  text-align: center;
  margin-bottom: 40px;
  line-height: 1.7;
}

/* ---------- Pain Section ---------- */
.pain-section{ background: var(--color-bg-soft); }

.pain-cards{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 40px 0 32px;
}
.pain-card{
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  box-shadow: var(--shadow-card);
}
.pain-num{
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 10px;
}
.pain-card p{
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.55;
}

.pain-highlight{
  background: var(--color-primary-soft);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  text-align: center;
}
.pain-highlight p{
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.7;
}
.pain-highlight strong{ color: var(--color-primary-dark); }

/* ---------- Curriculum Section ---------- */
.curriculum-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.curriculum-card{
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
  transition: box-shadow .2s ease, transform .2s ease;
}
.curriculum-card:hover{
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}
.curriculum-step{
  display: inline-block;
  font-size: 26px;
  font-weight: 800;
  color: var(--color-lime);
  -webkit-text-stroke: 1px var(--color-primary-dark);
  margin-bottom: 10px;
}
.curriculum-card h3{
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--color-text);
}
.curriculum-card h3 .en{
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-mute);
  margin-left: 4px;
}
.curriculum-card p{
  font-size: 14.5px;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ---------- Roadmap Timeline ---------- */
.roadmap-section{ background: var(--color-bg-soft); }

.timeline{
  position: relative;
  padding-left: 28px;
  border-left: 2px solid var(--color-primary-soft);
  display: flex;
  flex-direction: column;
  gap: 36px;
  margin-top: 40px;
}
.timeline-item{ position: relative; }
.timeline-marker{
  position: absolute;
  left: -35px;
  top: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 5px var(--color-primary-soft);
}
.timeline-marker span{
  position: absolute;
  top: -2px;
  left: 24px;
  font-size: 12px;
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.timeline-content{
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 26px 22px 22px;
  margin-top: 22px;
  box-shadow: var(--shadow-card);
}
.timeline-content h3{
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--color-text);
}
.timeline-content p{
  font-size: 14.5px;
  color: var(--color-text-sub);
  line-height: 1.7;
}
.timeline-content strong{ color: var(--color-primary-dark); }

/* ---------- Branch Section ---------- */
.notice-box{
  background: #fbfdf6;
  border: 1px dashed var(--color-primary);
  border-radius: var(--radius-md);
  padding: 20px 22px;
  margin-bottom: 36px;
  text-align: center;
}
.notice-box p{
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
}
.notice-list{
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-primary-dark) !important;
}

.branch-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.branch-card{
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}
.branch-tag{
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  color: var(--color-primary-dark);
  background: var(--color-primary-soft);
  border-radius: 999px;
  padding: 5px 12px;
  margin-bottom: 14px;
  width: fit-content;
}
.branch-card h3{
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--color-text);
}
.branch-info{
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 6px;
}
.branch-info li{
  font-size: 14.5px;
  color: var(--color-text-sub);
  line-height: 1.6;
  padding-left: 14px;
  position: relative;
}
.branch-info li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* ---------- Footer ---------- */
.site-footer{
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border);
  padding: 40px 0 30px;
}
.footer-inner{ text-align: center; }
.footer-brand{
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}
.footer-legal{
  font-size: 13px;
  color: var(--color-text-mute);
  line-height: 1.7;
  margin-bottom: 14px;
}
.footer-copy{
  font-size: 12px;
  color: #b4b8b1;
}

/* ---------- Mobile Sticky Bottom CTA ---------- */
.mobile-sticky-cta{
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 900;
  display: flex;
  width: 100%;
  box-shadow: 0 -6px 20px rgba(0,0,0,0.08);
  padding-bottom: env(safe-area-inset-bottom, 0);
}
.sticky-btn{
  flex: 1 1 50%;
  text-align: center;
  padding: 18px 8px;
  font-size: 15px;
  font-weight: 800;
  color: #ffffff;
}
.sticky-sangin{ background: var(--color-primary-dark); }
.sticky-jincheon{ background: var(--color-primary); }

/* ---------- Fade-in animation ---------- */
.fade-in{
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible{
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================
   RESPONSIVE - Tablet & Desktop
========================================================== */
@media (min-width: 640px){
  .pain-cards{ grid-template-columns: repeat(3, 1fr); }
  .curriculum-grid{ grid-template-columns: repeat(3, 1fr); }
  .branch-grid{ grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px){
  .pc-only{ display: inline; }

  .hero{ padding: 110px 0 84px; }
  .hero-title{ font-size: 42px; }
  .hero-desc{ font-size: 17px; }
  .hero-cta-group{ flex-direction: row; max-width: 560px; }

  .section{ padding: 96px 0; }
  .section-title{ font-size: 34px; }
  .section-desc{ font-size: 16px; }

  .mobile-sticky-cta{ display: none; }
  body{ padding-bottom: 0; }

  .timeline{ padding-left: 40px; }
  .timeline-marker{ left: -47px; width: 16px; height: 16px; }
  .timeline-marker span{ left: 28px; font-size: 13px; }
}

@media (min-width: 1024px){
  .hero-title{ font-size: 48px; }
  .branch-card{ padding: 40px; }
}