/* ============================================================
   GedNavi 랜딩 - style.css  (모바일 퍼스트)
   레퍼런스: onaeschool.com 모바일 완성도
   타겟: 초등 자녀 학부모 / 따뜻하고 신뢰감 있는 교육 플랫폼
   ============================================================ */

:root {
    --primary:        #7C3AED;
    --primary-dark:   #4F46E5;
    --primary-light:  #EDE9FE;
    --primary-tint:   #F5F3FF;
    --mint:           #06B6D4;
    --mint-light:     #CFFAFE;
    --pink:           #EC4899;
    --amber:          #F59E0B;
    --bg:             #F8FAFF;
    --text:           #1E1B4B;
    --text-sub:       #64748B;
    --white:          #FFFFFF;
    --line:           #ECEAF6;
    --shadow-soft:    0 6px 24px rgba(124, 58, 237, 0.10);
    --shadow-card:    0 10px 30px rgba(30, 27, 75, 0.08);
    --shadow-pop:     0 18px 44px rgba(124, 58, 237, 0.20);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--white);
    color: var(--text);
    margin: 0;
    overflow-x: hidden;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    /* 하단 여백은 navigation.css 의 .bottom-nav (모바일 64px) 가 담당 */
}

a { text-decoration: none; color: inherit; }
img, svg { max-width: 100%; display: block; }

/* 부트스트랩 제거에 따른 마진 유틸 보강 */
.me-1 { margin-right: 0.25rem; }
.me-2 { margin-right: 0.5rem; }

.gn-container {
    width: 100%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 18px;
}

/* 공통 배지/필 칩 ------------------------------------------------ */
.pill {
    display: inline-flex; align-items: center; gap: 7px;
    font-weight: 700; font-size: 0.8rem;
    padding: 7px 15px; border-radius: 9999px;
    background: var(--white); color: var(--primary);
    border: 1.5px solid var(--primary-light);
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.06);
    white-space: nowrap;
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.pill--mint  { color: var(--mint);  border-color: var(--mint-light); }
.pill--amber { color: var(--amber); border-color: #FDE68A; }
.pill--pink  { color: var(--pink);  border-color: #FBCFE8; }

/* 섹션 헤더 (가운데 배지 + 강조 헤드라인) ---------------------- */
.sec-head { text-align: center; margin-bottom: 26px; }
.sec-head .sec-badge {
    display: inline-flex; align-items: center; gap: 7px;
    background: var(--white); color: var(--primary);
    font-weight: 700; font-size: 0.82rem;
    padding: 8px 16px; border-radius: 9999px;
    box-shadow: var(--shadow-soft); margin-bottom: 16px;
}
.sec-head h2 {
    font-size: 1.6rem; font-weight: 800; letter-spacing: -0.6px;
    color: var(--text); margin: 0 0 10px; line-height: 1.3;
}
.sec-head h2 .accent { color: var(--primary); }
.sec-head p { color: var(--text-sub); font-size: 0.95rem; margin: 0; line-height: 1.6; }

/* 버튼 ---------------------------------------------------------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 9px;
    font-weight: 700; font-size: 1rem;
    padding: 15px 26px; border-radius: 9999px;
    cursor: pointer; border: 2px solid transparent;
    transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
    white-space: nowrap;
}
.btn--primary {
    background: linear-gradient(120deg, var(--primary), var(--primary-dark));
    color: var(--white); box-shadow: 0 10px 24px rgba(124, 58, 237, 0.34);
}
.btn--primary:hover { transform: translateY(-3px); color: var(--white); box-shadow: 0 16px 34px rgba(124, 58, 237, 0.46); }
.btn--white { background: var(--white); color: var(--primary); box-shadow: 0 10px 26px rgba(30, 27, 75, 0.18); }
.btn--white:hover { transform: translateY(-3px); color: var(--primary); box-shadow: 0 16px 36px rgba(30, 27, 75, 0.28); }
.btn--ghost-light {
    background: rgba(255,255,255,0.16); color: var(--white);
    border-color: rgba(255,255,255,0.5); backdrop-filter: blur(4px);
}
.btn--ghost-light:hover { transform: translateY(-3px); background: rgba(255,255,255,0.28); color: var(--white); }

/* ===================== 1. 네비바 ===================== */
.gn-nav {
    position: fixed;
    top: env(safe-area-inset-top, 0px);
    left: 0; right: 0;
    height: 75px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border: none;
    box-shadow: 0 2px 16px rgba(30, 27, 75, 0.06);
    padding-left: env(safe-area-inset-left, 0px);
    padding-right: env(safe-area-inset-right, 0px);
}
.gn-nav__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.gn-nav__left { display: flex; align-items: center; gap: 8px; }
.hamburger-toggle {
    min-width: 44px; min-height: 44px;
    display: flex; align-items: center; justify-content: center;
    border: none; background: transparent;
    font-size: 1.2rem; color: var(--text);
    cursor: pointer; border-radius: 12px; transition: background .2s ease;
}
.hamburger-toggle:hover { background: var(--primary-light); }
.gn-brand { display: flex; flex-direction: column; line-height: 1.1; }
.gn-brand__name { font-weight: 800; font-size: 1.4rem; letter-spacing: -0.5px; color: var(--primary); }
.gn-brand__sub { font-size: 0.66rem; font-weight: 600; color: var(--text-sub); margin-top: 1px; letter-spacing: 0.2px; }
.gn-nav__login {
    display: inline-flex; align-items: center; gap: 7px;
    color: var(--primary); font-weight: 700; font-size: 0.9rem;
    padding: 9px 18px; border: 1.5px solid var(--primary);
    border-radius: 9999px;
    transition: background .25s ease, color .25s ease, transform .25s ease;
}
.gn-nav__login:hover { background: var(--primary); color: var(--white); transform: translateY(-1px); }

/* ===================== 2. 히어로 ===================== */
.hero { padding: 14px 14px 8px; }
.hero__media {
    position: relative;
    border-radius: 26px;
    overflow: hidden;
    min-height: 440px;
    display: flex;
    align-items: flex-end;
    background-image: url('../images/hero_bg.png');
    background-size: cover;
    background-position: center 30%;
    box-shadow: var(--shadow-card);
}
.hero__media::before {
    content: "";
    position: absolute; inset: 0;
    /* 모바일: 사진이 밝아도 흰 글씨가 확실히 읽히도록 진한 스크림 */
    background: linear-gradient(180deg, rgba(17,13,48,0.50) 0%, rgba(17,13,48,0.58) 44%, rgba(17,13,48,0.95) 100%);
}
.hero__inner { position: relative; z-index: 2; padding: 28px 24px 32px; width: 100%; }
.hero__badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(255,255,255,0.18); border: 1px solid rgba(255,255,255,0.32);
    color: #fff; font-weight: 600; font-size: 0.76rem;
    padding: 7px 14px; border-radius: 9999px; margin-bottom: 16px;
    backdrop-filter: blur(6px);
}
.hero__badge .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--mint-light); }
.hero__title {
    font-size: 1.85rem; font-weight: 800; line-height: 1.3;
    letter-spacing: -0.6px; color: #fff; margin: 0 0 12px;
    text-shadow: 0 2px 14px rgba(0,0,0,0.55);
}
.hero__title .accent { color: #C4B5FD; text-shadow: 0 2px 14px rgba(0,0,0,0.45); }
.hero__desc { color: rgba(255,255,255,0.94); font-size: 0.98rem; line-height: 1.6; margin: 0 0 22px; text-shadow: 0 1px 12px rgba(0,0,0,0.5); }
.hero__cta { display: flex; flex-direction: column; gap: 10px; }
.hero__cta .btn { width: 100%; }

/* ===================== 3. 하이라이트 밴드 ===================== */
.highlight { background: var(--primary-tint); padding: 30px 0 26px; text-align: center; }
.highlight__lead {
    font-size: 1.05rem; font-weight: 700; color: var(--text);
    line-height: 1.6; margin: 0 auto 18px; max-width: 560px;
}
.highlight__lead b { color: var(--primary); }
.highlight__chips { display: flex; flex-wrap: wrap; gap: 9px; justify-content: center; }

/* ===================== 4. 신뢰 지표 (레이어드 카드) ===================== */
.stats { background: var(--primary-tint); padding: 0 0 34px; }
.stats__card {
    background: var(--white);
    border-radius: 22px;
    box-shadow: var(--shadow-card);
    padding: 22px 16px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}
.stat-tile {
    text-align: center;
    background: var(--primary-tint);
    border-radius: 16px;
    padding: 18px 6px;
}
.stat-tile--mint { background: var(--mint-light); }
.stat-num { font-size: 1.7rem; font-weight: 900; line-height: 1; letter-spacing: -0.5px; }
.stat-num--purple { color: var(--primary); }
.stat-num--mint   { color: #0891B2; }
.stat-label { margin-top: 8px; color: var(--text-sub); font-size: 0.72rem; font-weight: 600; line-height: 1.35; }

/* 파트너/신뢰 로고 행 */
.partners { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.partner-pill {
    font-size: 0.74rem; font-weight: 600; color: var(--text-sub);
    background: var(--white); border: 1px solid var(--line);
    padding: 7px 13px; border-radius: 9999px;
}

/* ===================== 5. 핵심 기능 카드 ===================== */
.features { background: var(--bg); padding: 44px 0 50px; }
.card-grid { display: flex; flex-direction: column; gap: 13px; }
.feat-card {
    display: flex; align-items: center; gap: 15px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 18px 18px;
    box-shadow: 0 4px 18px rgba(124, 58, 237, 0.06);
    transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.feat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-pop); border-color: transparent; }
.feat-icon {
    flex: 0 0 auto;
    width: 54px; height: 54px; border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem; color: #fff;
    box-shadow: 0 6px 16px rgba(124,58,237,0.22);
}
.feat-body { flex: 1; min-width: 0; }
.feat-title { font-weight: 800; font-size: 1.05rem; color: var(--text); margin: 0 0 3px; }
.feat-desc { font-size: 0.86rem; color: var(--text-sub); line-height: 1.5; margin: 0; }
.feat-arrow { flex: 0 0 auto; color: var(--primary); font-size: 1rem; transition: transform .25s ease; }
.feat-card:hover .feat-arrow { transform: translateX(4px); }

/* ===================== 6. CTA 배너 ===================== */
.cta-band {
    background: linear-gradient(135deg, #7C3AED 0%, #5B4BE0 60%, #4F46E5 100%);
    color: var(--white); text-align: center;
    padding: 50px 0; margin: 0 14px; border-radius: 26px;
    box-shadow: var(--shadow-pop);
}
.cta-band h2 { font-size: 1.55rem; font-weight: 800; letter-spacing: -0.5px; margin: 0 0 10px; }
.cta-band p { font-size: 1rem; color: rgba(255,255,255,0.9); margin: 0 0 24px; }
.cta-wrap { padding: 44px 0 8px; }

/* ===================== 7. 푸터 ===================== */
.site-footer { background: var(--text); color: var(--white); padding: 40px 0 30px; }
.footer-grid { display: flex; flex-direction: column; gap: 18px; text-align: center; }
.footer-brand { font-weight: 800; font-size: 1.3rem; color: var(--white); margin-bottom: 8px; }
.footer-desc { font-size: 0.88rem; color: rgba(255,255,255,0.6); line-height: 1.7; }
.footer-contact a { color: rgba(255,255,255,0.8); font-size: 0.9rem; transition: color .2s ease; }
.footer-contact a:hover { color: var(--mint-light); }
.footer-bottom {
    text-align: center; margin-top: 28px; padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.8rem; color: rgba(255,255,255,0.45);
}

/* ===================== 스크롤 진입 애니메이션 ===================== */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s cubic-bezier(.22,1,.36,1); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ============================================================
   데스크톱 (≥768px)
   ============================================================ */
@media (min-width: 768px) {
    body { padding-bottom: 0; }
    .gn-container { padding: 0 24px; }

    .gn-brand__name { font-size: 1.55rem; }
    .gn-brand__sub { font-size: 0.72rem; }
    .gn-nav__login { font-size: 0.95rem; padding: 10px 22px; }

    /* 히어로: 좌측 정렬 큰 사진 */
    .hero { padding: 24px 24px 0; max-width: 1188px; margin: 0 auto; }
    .hero__media { min-height: 540px; border-radius: 34px; align-items: center; }
    .hero__media::before { background: linear-gradient(100deg, rgba(30,27,75,0.82) 0%, rgba(30,27,75,0.45) 45%, rgba(30,27,75,0.1) 100%); }
    .hero__inner { max-width: 620px; padding: 0 56px; }
    .hero__title { font-size: 3rem; line-height: 1.18; margin-bottom: 18px; }
    .hero__desc { font-size: 1.18rem; margin-bottom: 30px; max-width: 480px; }
    .hero__cta { flex-direction: row; }
    .hero__cta .btn { width: auto; }

    .highlight { padding: 44px 0 38px; }
    .highlight__lead { font-size: 1.3rem; }

    .stats { padding: 0 0 56px; }
    .stats__card { padding: 30px 24px; gap: 16px; max-width: 880px; margin: 0 auto; border-radius: 26px; }
    .stat-tile { padding: 26px 10px; border-radius: 18px; }
    .stat-num { font-size: 3rem; }
    .stat-label { font-size: 0.86rem; margin-top: 11px; }
    .partners { margin-top: 26px; gap: 10px; }
    .partner-pill { font-size: 0.82rem; padding: 8px 16px; }

    .features { padding: 80px 0 88px; }
    .sec-head { margin-bottom: 44px; }
    .sec-head h2 { font-size: 2.1rem; }
    .sec-head p { font-size: 1.05rem; }

    /* 데스크톱: 3열 세로 카드 */
    .card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
    .feat-card { flex-direction: column; align-items: flex-start; padding: 30px 28px; gap: 0; border-radius: 20px; }
    .feat-icon { width: 60px; height: 60px; margin-bottom: 20px; }
    .feat-body { width: 100%; }
    .feat-title { font-size: 1.18rem; margin-bottom: 8px; }
    .feat-desc { font-size: 0.95rem; }
    .feat-arrow { display: none; }

    .cta-wrap { padding: 84px 0 24px; }
    .cta-band { margin: 0 24px; padding: 72px 0; border-radius: 32px; }
    .cta-band h2 { font-size: 2.2rem; }
    .cta-band p { font-size: 1.15rem; margin-bottom: 30px; }

    .site-footer { padding: 56px 0 34px; }
    .footer-grid { flex-direction: row; justify-content: space-between; align-items: flex-start; text-align: left; }
    .footer-contact { text-align: right; }
    .footer-brand { font-size: 1.45rem; }
}

/* PC 전용 카드: 768px 이하 모바일에서는 숨김 (기존 정책 유지) */
@media (max-width: 767px) {
    .pc-only-card { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
    .btn, .feat-card, .feat-icon, .feat-arrow { transition: none; }
}