/* ElSeeker 서비스 소개 페이지 (/web/about)
 * theme.css 시맨틱 토큰 기반 — 다크/라이트 자동 대응.
 * accent 틴트는 color-mix(... var(--color-accent) ...)로 테마에 따라 자동 분기.
 * BEM-like: about-* */

.about-page {
    --about-radius: 18px;
    --about-tint-soft: color-mix(in srgb, var(--color-accent) 8%, transparent);
    --about-tint-strong: color-mix(in srgb, var(--color-accent) 16%, transparent);
    --about-stagger: 0ms;
}

/* ── 진입 애니메이션 ─────────────────────────────── */
@keyframes about-fade-up {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.about-hero,
.about-section {
    animation: about-fade-up 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.about-section:nth-of-type(2) {
    animation-delay: 0.05s;
}

.about-section:nth-of-type(3) {
    animation-delay: 0.10s;
}

.about-section:nth-of-type(4) {
    animation-delay: 0.15s;
}

.about-section:nth-of-type(5) {
    animation-delay: 0.20s;
}

/* ── Hero ───────────────────────────────────────── */
.about-hero {
    position: relative;
    text-align: center;
    padding: 3.25rem 1rem 2.75rem;
    margin-bottom: 1rem;
    overflow: hidden;
}

/* accent 발광 배경 — 은은한 방사형 글로우 */
.about-hero-glow {
    position: absolute;
    top: -40%;
    left: 50%;
    width: min(680px, 120%);
    aspect-ratio: 1 / 1;
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 0;
}

.about-hero > *:not(.about-hero-glow) {
    position: relative;
    z-index: 1;
}

.about-hero-eyebrow {
    display: inline-block;
    padding: 0.3rem 0.85rem;
    margin-bottom: 1.1rem;
    border-radius: 999px;
    background-color: var(--about-tint-strong);
    color: var(--color-accent);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.about-hero-logo {
    display: block;
    height: 150px;
    width: auto;
    margin: 0 auto 1rem;
}

.about-hero-title {
    font-size: clamp(1.7rem, 5vw, 2.6rem);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.about-hero-sub {
    color: var(--color-text-secondary);
    font-size: clamp(0.98rem, 2.4vw, 1.1rem);
    line-height: 1.75;
    max-width: 640px;
    margin: 0 auto 2.25rem;
}

/* 모바일에서만 타이틀 줄바꿈 */
.about-br-mobile {
    display: none;
}

/* ── Hero 지표 스트립 ────────────────────────────── */
.about-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem 1.5rem;
    max-width: 560px;
    margin: 0 auto;
    padding: 1.1rem 1.25rem;
    list-style: none;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--about-radius);
}

.about-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1 1 0;
    min-width: 96px;
}

.about-stat + .about-stat {
    border-left: 1px solid var(--color-border);
}

.about-stat-num {
    font-size: 1.65rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-accent);
}

.about-stat-unit {
    font-size: 0.9rem;
    font-weight: 700;
    margin-left: 1px;
}

.about-stat-label {
    margin-top: 0.3rem;
    font-size: 0.82rem;
    color: var(--color-text-secondary);
    text-align: center;
}

/* ── 공통 섹션 ──────────────────────────────────── */
.about-section {
    margin-bottom: 3.5rem;
}

.about-section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 1.75rem;
}

.about-eyebrow {
    display: inline-block;
    margin-bottom: 0.55rem;
    color: var(--color-accent);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.about-section-title {
    font-size: clamp(1.35rem, 3.4vw, 1.7rem);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: 0.6rem;
    letter-spacing: -0.01em;
}

.about-section-desc {
    color: var(--color-text-secondary);
    font-size: 0.98rem;
    line-height: 1.7;
    margin-bottom: 0;
}

/* ── 미션 ──────────────────────────────────────── */
.about-mission {
    position: relative;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--about-radius);
    padding: 2.75rem 2rem 2.25rem;
    text-align: center;
    overflow: hidden;
}

/* 좌상단 장식용 큰 따옴표 */
.about-mission-mark {
    position: absolute;
    top: 0.2rem;
    left: 1.1rem;
    font-size: 4.5rem;
    line-height: 1;
    font-family: Georgia, "Times New Roman", serif;
    color: var(--about-tint-strong);
    pointer-events: none;
    user-select: none;
}

.about-mission-lead {
    position: relative;
    font-size: clamp(1.05rem, 2.6vw, 1.25rem);
    font-weight: 600;
    color: var(--color-text-primary);
    line-height: 1.7;
    max-width: 720px;
    margin: 0 auto 1.1rem;
}

.about-mission-lead strong {
    color: var(--color-accent);
}

.about-mission-text {
    color: var(--color-text-secondary);
    line-height: 1.85;
    max-width: 720px;
    margin: 0 auto;
}

/* ── 기능 카드 ─────────────────────────────────── */
.about-feature-link {
    display: block;
    height: 100%;
    text-decoration: none;
}

.about-feature-card {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--about-radius);
    padding: 1.85rem 1.4rem 1.5rem;
    overflow: hidden; /* 상단 accent 라인을 둥근 모서리에 맞춰 클리핑 */
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

/* 상단 accent 라인 (hover 시 부각) — border-radius 없이 카드 overflow로 모서리에 정렬 */
.about-feature-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--color-accent);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.about-feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin-bottom: 1rem;
    border-radius: 14px;
    background-color: var(--about-tint-strong);
    font-size: 1.85rem;
    line-height: 1;
}

.about-feature-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.about-feature-desc {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 1.1rem;
}

/* 바로가기 — 카드 하단 고정 */
.about-feature-go {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--color-accent);
    font-size: 0.9rem;
    font-weight: 700;
}

.about-feature-go span {
    transition: transform 0.2s ease;
    font-size: 1.15em;
    line-height: 1;
}

/* ── 통합 검색 강조 배너 ───────────────────────── */
.about-highlight {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.1rem 1.5rem;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--about-radius);
    padding: 1.85rem 2rem;
}

.about-highlight-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    flex: 0 0 auto;
    border-radius: 14px;
    background-color: var(--color-bg-elevated-bright);
    border: 1px solid var(--color-border);
    font-size: 1.7rem;
    line-height: 1;
}

.about-highlight-body {
    flex: 1 1 260px;
}

.about-eyebrow--invert {
    margin-bottom: 0.35rem;
}

.about-highlight-title {
    font-size: clamp(1.2rem, 3vw, 1.45rem);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: 0.4rem;
    letter-spacing: -0.01em;
}

.about-highlight-text {
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 0;
}

.about-highlight-cta {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.7rem 1.4rem;
    border-radius: 999px;
    background-color: var(--color-accent);
    color: var(--color-accent-fg);
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    transition: transform 0.15s ease, filter 0.15s ease;
}

.about-highlight-cta span {
    font-size: 1.15em;
    line-height: 1;
}

/* ── 시작하기 CTA ──────────────────────────────── */
.about-cta {
    text-align: center;
    background-color: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--about-radius);
    padding: 3rem 1.5rem;
}

.about-cta-title {
    font-size: clamp(1.4rem, 3.6vw, 1.85rem);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: 0.6rem;
    letter-spacing: -0.01em;
}

.about-cta-text {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 1.75rem;
}

.about-cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
}

.about-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.8rem 1.7rem;
    border-radius: 999px;
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.15s ease, filter 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.about-btn span {
    font-size: 1.15em;
    line-height: 1;
}

.about-btn--primary {
    background-color: var(--color-accent);
    color: var(--color-accent-fg);
}

.about-btn--ghost {
    background-color: transparent;
    border: 1px solid var(--color-border-control);
    color: var(--color-text-primary);
}

/* ── Hover: 데스크톱 전용 ──────────────────────── */
@media (hover: hover) and (pointer: fine) {
    .about-feature-link:hover .about-feature-card {
        transform: translateY(-5px);
        border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
        box-shadow: 0 12px 28px var(--color-shadow);
    }

    .about-feature-link:hover .about-feature-card::before {
        opacity: 1;
    }

    .about-feature-link:hover .about-feature-go span {
        transform: translateX(3px);
    }

    .about-highlight-cta:hover,
    .about-btn--primary:hover {
        transform: translateY(-2px);
        filter: brightness(1.06);
    }

    .about-btn--ghost:hover {
        background-color: var(--color-bg-elevated-strong);
        border-color: var(--color-accent);
        color: var(--color-accent);
    }
}

/* 키보드 포커스 가시성 */
.about-feature-link:focus-visible .about-feature-card {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.about-highlight-cta:focus-visible,
.about-btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

/* ── 반응형 ─────────────────────────────────────── */

/* 태블릿(세로)·대형 폰 이하 — 통합 검색 배너를 세로 스택으로 (가로 배치 줄바꿈 방지) */
@media (max-width: 767.98px) {
    .about-highlight {
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
        gap: 1rem;
        padding: 1.6rem 1.5rem;
    }

    /* 세로 배치에서는 flex-basis(260px)가 '높이'로 적용돼 빈 공간이 생기므로 해제 */
    .about-highlight-body {
        flex: 0 0 auto;
        width: 100%;
    }

    .about-highlight-cta {
        width: 100%;
        justify-content: center;
    }
}

/* 태블릿 범위 — 섹션 간격·여백 약간 축소 */
@media (min-width: 576px) and (max-width: 991.98px) {
    .about-section {
        margin-bottom: 3rem;
    }

    .about-hero {
        padding: 2.75rem 1rem 2.5rem;
    }
}

/* 모바일(소형 폰) */
@media (max-width: 575.98px) {
    .about-hero {
        padding: 2.25rem 0.5rem 2rem;
    }

    .about-br-mobile {
        display: inline;
    }

    .about-section {
        margin-bottom: 2.75rem;
    }

    .about-stats {
        gap: 0.5rem;
        padding: 1rem 0.75rem;
    }

    .about-stat {
        min-width: 0;
    }

    .about-stat-num {
        font-size: 1.4rem;
    }

    .about-stat-label {
        font-size: 0.72rem;
    }

    .about-mission {
        padding: 2.25rem 1.25rem 1.75rem;
    }

    .about-mission-mark {
        font-size: 3.5rem;
        left: 0.75rem;
    }

    .about-highlight {
        padding: 1.5rem 1.25rem;
    }

    .about-cta {
        padding: 2.25rem 1.25rem;
    }

    .about-cta-actions {
        flex-direction: column;
    }

    .about-btn {
        width: 100%;
        justify-content: center;
    }
}

/* 모션 최소화 선호 사용자 — 진입 애니메이션/이동 제거 */
@media (prefers-reduced-motion: reduce) {
    .about-hero,
    .about-section {
        animation: none;
    }

    .about-feature-link:hover .about-feature-card,
    .about-highlight-cta:hover,
    .about-btn--primary:hover {
        transform: none;
    }

    .about-feature-go span,
    .about-btn,
    .about-feature-card {
        transition: none;
    }
}