/* ============================================================
   랜딩 페이지 (landing.css)
   ============================================================ */

/* ── 브랜드 로고 ───────────────────────── */
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -0.03em; }
.brand__mark {
    display: grid; place-items: center; width: 34px; height: 34px;
    border-radius: 10px; color: #fff;
    background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
    box-shadow: var(--shadow-primary);
}
.brand__mark svg { width: 20px; height: 20px; }
.brand__name { font-size: 18px; }
.brand--light .brand__name { color: var(--color-text); }

/* ── 헤더 ───────────────────────── */
.lp-header {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--color-bg) 80%, transparent);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color .2s, background .2s;
}
.lp-header.is-scrolled { border-bottom-color: var(--color-border); }
.lp-header__inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.lp-nav { display: flex; align-items: center; gap: 28px; }
.lp-nav > a { font-size: 15px; font-weight: 500; color: var(--color-text-soft); transition: color .15s; }
.lp-nav > a:hover { color: var(--color-text); }
.lp-nav__cta { display: flex; align-items: center; gap: 10px; margin-left: 8px; }

.lp-burger { display: none; width: 42px; height: 42px; border-radius: 10px; align-items: center; justify-content: center; }
.lp-burger:hover { background: var(--color-surface-2); }
.lp-burger svg { width: 24px; height: 24px; }
.lp-burger .lp-burger__close { display: none; }
.lp-burger.is-open .lp-burger__open { display: none; }
.lp-burger.is-open .lp-burger__close { display: block; }

/* ── Hero ───────────────────────── */
.lp-hero { position: relative; overflow: hidden; padding-block: clamp(56px, 9vw, 110px); }
.lp-hero::before {
    content: ""; position: absolute; inset: 0; z-index: -1;
    background:
        radial-gradient(60% 60% at 80% 0%, var(--blue-100), transparent 70%),
        radial-gradient(50% 50% at 0% 20%, var(--color-primary-soft), transparent 70%);
    opacity: .9;
}
[data-theme="dark"] .lp-hero::before {
    background:
        radial-gradient(60% 60% at 80% 0%, rgba(37,99,235,.18), transparent 70%),
        radial-gradient(50% 50% at 0% 20%, rgba(59,130,246,.12), transparent 70%);
}
.lp-hero__inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.lp-hero__badge { margin-bottom: 20px; }
.badge-ic { width: 14px; height: 14px; }
.lp-hero__title { font-size: clamp(34px, 5.2vw, 60px); line-height: 1.1; }
.grad { background: linear-gradient(120deg, var(--blue-500), var(--blue-700)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lp-hero__lead { margin-top: 22px; font-size: 18px; color: var(--color-text-soft); }
.lp-hero__actions { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }
.lp-hero__trust { margin-top: 32px; display: flex; align-items: center; gap: 14px; }
.lp-hero__trust p { font-size: 14px; color: var(--color-text-soft); }
.avatars { display: flex; }
.avatars span {
    width: 34px; height: 34px; border-radius: 50%; margin-left: -10px;
    border: 2px solid var(--color-bg);
    background: linear-gradient(135deg, var(--blue-300), var(--blue-600));
}
.avatars span:first-child { margin-left: 0; }

/* Hero 비주얼 카드 */
.lp-hero__visual { position: relative; }
.player-card { padding: 24px; box-shadow: var(--shadow-lg); }
.player-card__top { display: flex; align-items: center; justify-content: space-between; }
.player-card__q { font-size: 13px; color: var(--color-muted); font-variant-numeric: tabular-nums; }
.player-card__prompt { margin-top: 18px; font-size: 18px; font-weight: 700; }
.eq-bars { margin: 22px 0; height: 120px; display: flex; align-items: flex-end; gap: 7px; }
.eq-bars span {
    flex: 1; height: var(--h); border-radius: var(--radius-full);
    background: linear-gradient(var(--blue-400), var(--blue-600));
    animation: eqpulse 1.4s ease-in-out infinite; transform-origin: bottom;
}
.eq-bars span:nth-child(odd)  { animation-delay: -.2s; }
.eq-bars span:nth-child(3n)   { animation-delay: -.5s; }
.eq-bars span:nth-child(4n)   { animation-delay: -.8s; }
@keyframes eqpulse { 0%,100% { transform: scaleY(.6); opacity:.7 } 50% { transform: scaleY(1); opacity:1 } }
.player-card__opts { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.opt { padding: 12px; border-radius: var(--radius-md); border: 1px solid var(--color-border-strong); font-weight: 600; transition: .15s; }
.opt:hover { border-color: var(--color-primary); }
.opt--active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.float-chip {
    position: absolute; display: inline-flex; align-items: center; gap: 6px;
    padding: 9px 14px; border-radius: var(--radius-full); font-size: 13px; font-weight: 700;
    background: var(--color-surface); box-shadow: var(--shadow-lg); border: 1px solid var(--color-border);
}
.float-chip svg { width: 16px; height: 16px; }
.float-chip--1 { top: 8%; left: -22px; color: var(--color-success); }
.float-chip--2 { bottom: 10%; right: -16px; color: var(--color-warning); }

/* ── 지표 ───────────────────────── */
.lp-metrics { border-block: 1px solid var(--color-border); background: var(--color-bg-subtle); }
.lp-metrics__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding-block: 40px; text-align: center; }
.lp-metrics__grid strong { display: block; font-size: clamp(28px, 4vw, 40px); letter-spacing: -0.03em; color: var(--color-primary); }
.lp-metrics__grid span { font-size: 14px; color: var(--color-text-soft); }

/* ── 공통 섹션 헤더 ───────────────────────── */
.lp-head { max-width: 640px; margin-inline: auto; margin-bottom: 48px; }

/* ── 기능 그리드 ───────────────────────── */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature__ic {
    display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px;
    background: var(--color-surface-2); color: var(--color-text-soft); margin-bottom: 18px;
}
.feature__ic--primary { background: var(--color-primary-soft); color: var(--color-primary); }
.feature__ic svg { width: 26px; height: 26px; }
.feature h3 { font-size: 19px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.feature p { margin-top: 10px; color: var(--color-text-soft); font-size: 15px; }

/* ── 이용 방법 ───────────────────────── */
.lp-how { background: var(--color-bg-subtle); }
.steps { display: flex; align-items: stretch; justify-content: center; gap: 16px; flex-wrap: wrap; }
.step { flex: 1; min-width: 220px; max-width: 320px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow-sm); }
.step__num { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; background: var(--color-primary); color: #fff; font-weight: 800; margin-bottom: 16px; }
.step h3 { font-size: 18px; }
.step p { margin-top: 8px; color: var(--color-text-soft); font-size: 15px; }
.step__arrow { display: grid; place-items: center; flex: none; align-self: center; color: var(--color-muted); }
.step__arrow svg { width: 28px; height: 28px; }

/* ── 왜 청음 훈련 ───────────────────────── */
.lp-why { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.check-list { margin-top: 24px; display: grid; gap: 14px; }
.check-list li { display: flex; align-items: center; gap: 10px; font-weight: 500; }
.check-list svg { width: 22px; height: 22px; color: var(--color-success); flex-shrink: 0; }
.lp-why__compare { display: grid; gap: 16px; }
.compare { border-radius: var(--radius-lg); padding: 22px 24px; border: 1px solid var(--color-border); }
.compare h4 { font-size: 14px; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 14px; }
.compare ul { display: grid; gap: 10px; }
.compare li { display: flex; align-items: center; gap: 8px; font-size: 15px; }
.compare--before { background: var(--color-surface-2); color: var(--color-text-soft); }
.compare--after { background: var(--color-primary-soft); border-color: color-mix(in srgb, var(--color-primary) 30%, transparent); }
.compare--after svg { width: 18px; height: 18px; color: var(--color-primary); }

/* ── 후기 ───────────────────────── */
.lp-quotes { background: var(--color-bg-subtle); }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.quote blockquote { font-size: 16px; line-height: 1.7; }
.quote figcaption { margin-top: 20px; display: flex; align-items: center; gap: 12px; }
.quote__av { width: 42px; height: 42px; border-radius: 50%; background: linear-gradient(135deg, var(--blue-300), var(--blue-600)); flex-shrink: 0; }
.quote figcaption strong { font-size: 15px; }
.quote figcaption i { display: block; font-style: normal; font-size: 13px; color: var(--color-muted); }

/* ── FAQ ───────────────────────── */
.lp-faq__inner { max-width: 760px; margin-inline: auto; }
.faq-list { display: grid; gap: 12px; }
.faq { border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); overflow: hidden; }
.faq summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 22px; font-weight: 600; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq__chev { width: 20px; height: 20px; color: var(--color-muted); transition: transform .2s; flex-shrink: 0; }
.faq[open] .faq__chev { transform: rotate(180deg); }
.faq__body { padding: 0 22px 20px; color: var(--color-text-soft); }

/* ── CTA ───────────────────────── */
.lp-cta { padding: 88px 24px; }
.lp-cta__inner {
    text-align: center; padding: 64px 24px; border-radius: var(--radius-xl);
    background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
    color: #fff; box-shadow: var(--shadow-lg);
}
.lp-cta__inner h2 { font-size: clamp(26px, 4vw, 38px); }
.lp-cta__inner p { margin-top: 14px; font-size: 17px; color: rgba(255,255,255,.85); }
/* 기본(공간 충분): 줄바꿈 없이 한 줄. 좁은 화면에서만 "충분합니다." 뒤에서 줄바꿈 */
.lp-cta__br { display: none; }
.lp-cta__btn { margin-top: 28px; background: #fff; color: var(--blue-700); }
.lp-cta__btn:hover { background: var(--blue-50); }

/* ── 푸터 ───────────────────────── */
.lp-footer { border-top: 1px solid var(--color-border); background: var(--color-bg-subtle); padding-top: 56px; }
.lp-footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.lp-footer__desc { margin-top: 16px; color: var(--color-text-soft); font-size: 14px; max-width: 280px; }
.lp-footer__email { display: inline-block; margin-top: 16px; color: var(--color-text-soft); font-size: 14px; }
.lp-footer__email:hover { color: var(--color-primary); }
.lp-footer__cs h4 { font-size: 14px; margin-bottom: 16px; }
.lp-footer__cs-line { color: var(--color-text-soft); font-size: 14px; line-height: 1.9; }
.lp-footer__col h4 { font-size: 14px; margin-bottom: 16px; }
.lp-footer__col a { display: block; padding: 6px 0; color: var(--color-text-soft); font-size: 14px; transition: color .15s; }
.lp-footer__col a:hover { color: var(--color-primary); }
.lp-footer__biz-list { margin: 20px 0 0; padding: 0; list-style: none; font-size: 14px; color: var(--color-text-soft); line-height: 1.9; }
.lp-footer__biz-name { color: inherit; transition: color .15s; }
.lp-footer__biz-name:hover { color: var(--color-primary); }
.lp-footer__bottom { display: flex; align-items: center; justify-content: space-between; margin-top: 48px; padding-block: 24px; border-top: 1px solid var(--color-border); font-size: 13px; color: var(--color-muted); }

/* ============================================================
   스크롤 등장 애니메이션
   ── data-reveal 요소는 화면에 들어올 때 부드럽게 나타난다.
   ── JS가 켜진 경우(html.js)에만 숨김 처리해, JS 미동작 시에도
      콘텐츠가 항상 보이도록 한다.
   ============================================================ */
html.js [data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .6s ease-out, transform .6s ease-out;
    transition-delay: var(--reveal-delay, 0s);
    will-change: opacity, transform;
}
html.js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
}
/* 모션 최소화 설정/환경에서는 애니메이션 없이 즉시 표시 */
@media (prefers-reduced-motion: reduce) {
    html.js [data-reveal] { opacity: 1; transform: none; transition: none; }
}
html[data-reduce-motion="1"].js [data-reveal] {
    opacity: 1; transform: none; transition: none;
}

/* ============================================================
   반응형
   ============================================================ */
@media (max-width: 980px) {
    .lp-hero__inner { grid-template-columns: 1fr; gap: 48px; }
    .lp-hero__visual { width: 100%; max-width: 460px; margin-inline: auto; }
    .lp-why { grid-template-columns: 1fr; gap: 36px; }
    .feature-grid, .quote-grid { grid-template-columns: repeat(2, 1fr); }
    .lp-footer__grid { grid-template-columns: 1fr 1fr; }
    .lp-footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
    .lp-nav {
        position: fixed; inset: var(--header-h) 0 auto 0;
        flex-direction: column; align-items: stretch; gap: 4px;
        padding: 16px 20px 24px; background: var(--color-bg);
        border-bottom: 1px solid var(--color-border); box-shadow: var(--shadow-lg);
        transform: translateY(-12px); opacity: 0; pointer-events: none; transition: .2s;
    }
    .lp-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .lp-nav > a { padding: 12px 8px; border-radius: var(--radius-md); }
    .lp-nav > a:hover { background: var(--color-surface-2); }
    .lp-nav__cta { margin-left: 0; margin-top: 10px; flex-direction: column; }
    .lp-nav__cta .btn { width: 100%; }
    .lp-burger { display: flex; }
    /* 모바일에서는 단계 박스를 세로로 쌓고 화살표를 박스 사이 중앙에 배치.
       회전은 자식 svg에 적용해 등장 애니메이션(span의 transform)과 충돌하지 않게 한다. */
    .steps { flex-direction: column; align-items: stretch; }
    .step { max-width: none; }
    .step__arrow svg { transform: rotate(90deg); }
    .lp-cta { padding-block: 60px; }
    .lp-cta__inner { padding: 48px 24px; }
}
@media (max-width: 560px) {
    .lp-metrics__grid { grid-template-columns: 1fr 1fr; gap: 28px 16px; }
    .feature-grid, .quote-grid { grid-template-columns: 1fr; }
    .lp-footer__grid { grid-template-columns: 1fr; gap: 28px; }
    .float-chip--1 { left: 0; }
    .float-chip--2 { right: 0; }
    .lp-cta__br { display: inline; }   /* 좁은 화면: "충분합니다." 뒤에서 한 번 줄바꿈 */
}