/* =========================================================
   디자인 토큰 — 색상/폰트는 여기만 바꾸면 전체에 반영됩니다
   ========================================================= */
:root {
    --c-bg:        #f8f6f3;
    --c-bg-alt:    #efebe5;
    --c-surface:   #ffffff;
    --c-text:      #1e2328;
    --c-muted:     #646b73;
    --c-line:      #dcd6cd;
    --c-primary:   #e0662a;   /* 포인트 컬러 */
    --c-primary-d: #c2531c;
    --c-dark:      #12202c;   /* 푸터 / 오버레이 */

    --f-sans:  "Noto Sans KR", system-ui, -apple-system, "Apple SD Gothic Neo", sans-serif;
    --f-serif: "Playfair Display", "Noto Serif KR", Georgia, serif;

    --container: 1200px;
    --gutter: 24px;
    --header-h: 76px;
    --radius: 4px;
    --section-y: clamp(64px, 9vw, 120px);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 56px); }
body {
    margin: 0; background: var(--c-bg); color: var(--c-text);
    font-family: var(--f-sans); font-size: 16px; line-height: 1.75;
    -webkit-font-smoothing: antialiased; word-break: keep-all;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0 0 .5em; line-height: 1.25; font-weight: 600; }
p { margin: 0 0 1.1em; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: -9999px; top: 8px; z-index: 999; background: var(--c-dark); color: #fff; padding: 8px 14px; }
.skip-link:focus { left: 8px; }

/* ---------- Header ---------- */
.site-header {
    position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--header-h);
    transition: background .3s, box-shadow .3s, color .3s;
    color: #fff;
}
.site-header.is-solid,
body:not(.page-home) .site-header.is-solid { background: var(--c-bg); color: var(--c-text); box-shadow: 0 1px 0 var(--c-line); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.logo img { height: 28px; width: auto; }
.logo-text { font-family: var(--f-serif); font-size: 24px; letter-spacing: .02em; font-weight: 600; }

.gnb { display: flex; align-items: center; gap: 40px; }
.gnb ul { display: flex; gap: 32px; }
.gnb ul a { font-size: 15px; font-weight: 500; position: relative; padding: 6px 0; }
.gnb ul a::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px;
    background: var(--c-primary); transform: scaleX(0); transition: transform .25s;
}
.gnb ul a:hover::after, .gnb ul a.is-active::after { transform: scaleX(1); }
.lang-switch { font-size: 13px; display: flex; gap: 6px; opacity: .85; }
.lang-switch a.is-active { font-weight: 700; color: var(--c-primary); }

.menu-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; color: inherit; position: relative; }
.menu-toggle .bar { position: absolute; left: 9px; right: 9px; height: 2px; background: currentColor; transition: transform .25s, top .25s; }
.menu-toggle .bar:nth-of-type(1) { top: 15px; }
.menu-toggle .bar:nth-of-type(2) { top: 23px; }
.menu-open .menu-toggle .bar:nth-of-type(1) { top: 19px; transform: rotate(45deg); }
.menu-open .menu-toggle .bar:nth-of-type(2) { top: 19px; transform: rotate(-45deg); }

/* ---------- Common ---------- */
.section { padding: var(--section-y) 0; }
.bg-alt { background: var(--c-bg-alt); }
.eyebrow { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--c-primary); font-weight: 700; margin-bottom: 14px; }
.section-title { font-family: var(--f-serif); font-size: clamp(28px, 3.4vw, 42px); }
.sub-title { font-size: 20px; margin-bottom: 24px; }
.lead { font-size: 18px; color: var(--c-muted); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 88px); }
.align-center { align-items: center; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 48px; }

.media { aspect-ratio: 4 / 3; overflow: hidden; border-radius: var(--radius); background: var(--c-bg-alt); }
.media img, .media .img-placeholder { width: 100%; height: 100%; object-fit: cover; }
.media-portrait { aspect-ratio: 3 / 4; max-width: 420px; justify-self: end; }
.img-placeholder {
    display: flex; align-items: center; justify-content: center;
    background: repeating-linear-gradient(45deg, var(--c-bg-alt), var(--c-bg-alt) 12px, #e6e1d9 12px, #e6e1d9 24px);
    color: var(--c-muted); font-size: 13px;
}

.btn {
    display: inline-flex; align-items: center; gap: 10px; padding: 14px 28px;
    font-size: 15px; font-weight: 500; border-radius: var(--radius); border: 1px solid transparent;
    cursor: pointer; transition: background .2s, color .2s, border-color .2s;
}
.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-d); }
.btn-light { border-color: rgba(255,255,255,.7); color: #fff; }
.btn-light:hover { background: #fff; color: var(--c-text); }
.link-arrow { display: inline-flex; gap: 8px; font-weight: 500; color: var(--c-primary); }
.link-arrow span { transition: transform .2s; }
.link-arrow:hover span { transform: translateX(4px); }
.num { font-family: var(--f-serif); color: var(--c-primary); font-size: 15px; }

/* ---------- Home Hero ---------- */
.hero {
    position: relative; min-height: 100vh; min-height: 100svh; display: flex; align-items: flex-end;
    background: var(--c-dark) center / cover no-repeat; color: #fff; padding-bottom: clamp(64px, 12vh, 140px);
}
.hero.no-image { background-image: linear-gradient(135deg, #1b3446, var(--c-dark)); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(10,18,26,.75), rgba(10,18,26,.15) 60%); }
.hero-inner { position: relative; }
.hero-title { font-family: var(--f-serif); font-size: clamp(48px, 8vw, 104px); line-height: 1.02; margin-bottom: 28px; }
.hero-title span { display: block; }
.hero-title .accent { color: var(--c-primary); font-style: italic; }
.hero-lead { max-width: 560px; font-size: 18px; opacity: .9; margin-bottom: 36px; }

/* ---------- Clients ---------- */
.clients-head { display: grid; grid-template-columns: 1fr 2fr; gap: 24px; align-items: baseline; margin-bottom: 40px; }
.clients-list { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--c-line); }
.clients-list li { padding: 28px 20px 0 0; display: flex; flex-direction: column; gap: 8px; }
.clients-list strong { font-size: 17px; }
.clients-list .desc { color: var(--c-muted); font-size: 14px; line-height: 1.6; }

/* ---------- Service cards ---------- */
.service-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
    background: var(--c-surface); padding: 36px 32px; border-radius: var(--radius);
    display: flex; flex-direction: column; gap: 12px; min-height: 280px;
    border: 1px solid var(--c-line); transition: transform .25s, box-shadow .25s, border-color .25s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,.08); border-color: var(--c-primary); }
.service-card h3 { font-size: 22px; margin-top: 12px; }
.service-card p { color: var(--c-muted); flex: 1; }
.service-card .read { color: var(--c-primary); font-weight: 500; }

/* ---------- Sub page hero ---------- */
.page-hero {
    position: relative; min-height: 520px; display: flex; align-items: flex-end;
    background: var(--c-dark) center / cover no-repeat; color: #fff;
    padding: calc(var(--header-h) + 60px) 0 72px;
}
.page-hero.no-image { background-image: linear-gradient(135deg, #1b3446, var(--c-dark)); }
.page-hero-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(10,18,26,.7), rgba(10,18,26,.2)); }
.page-hero-inner { position: relative; max-width: 900px; margin-left: 0; }
.page-hero h1 { font-family: var(--f-serif); font-size: clamp(32px, 4.6vw, 56px); }
.page-hero .lead { color: rgba(255,255,255,.85); margin: 0; }

/* ---------- About ---------- */
.since-badge { display: inline-flex; flex-direction: column; margin-top: 16px; padding-left: 20px; border-left: 3px solid var(--c-primary); }
.since-badge span { font-size: 13px; color: var(--c-muted); text-transform: uppercase; letter-spacing: .1em; }
.since-badge strong { font-family: var(--f-serif); font-size: 48px; line-height: 1.1; }
.ceo-quote { font-family: var(--f-serif); font-size: clamp(22px, 2.4vw, 30px); line-height: 1.45; margin: 0 0 32px; }
.ceo-sign { font-weight: 700; margin-top: 28px; }
.mission-head { margin-bottom: 64px; align-items: start; }
.values { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.value-card { border-top: 2px solid var(--c-text); padding-top: 24px; }
.value-card h4 { font-size: 20px; margin: 12px 0; }
.value-card p { color: var(--c-muted); font-size: 15px; }

/* ---------- Services detail ---------- */
.service-tabs { position: sticky; top: var(--header-h); z-index: 50; background: var(--c-bg); border-bottom: 1px solid var(--c-line); }
.service-tabs .container { display: flex; gap: 8px; overflow-x: auto; }
.service-tabs a { padding: 16px 20px; font-weight: 500; color: var(--c-muted); border-bottom: 2px solid transparent; white-space: nowrap; }
.service-tabs a.is-active { color: var(--c-text); border-bottom-color: var(--c-primary); }
.service-detail.reverse .grid-2 > :first-child { order: 2; }

/* ---------- HSE ---------- */
.check-list li { position: relative; padding: 14px 0 14px 32px; border-bottom: 1px solid var(--c-line); }
.check-list li::before {
    content: ""; position: absolute; left: 0; top: 22px; width: 14px; height: 8px;
    border-left: 2px solid var(--c-primary); border-bottom: 2px solid var(--c-primary); transform: rotate(-45deg);
}
.closing { margin: 64px 0 0; font-family: var(--f-serif); font-size: 22px; text-align: center; }

/* ---------- Contact ---------- */
.info-list { margin: 32px 0 0; }
.info-list div { display: grid; grid-template-columns: 120px 1fr; padding: 14px 0; border-bottom: 1px solid var(--c-line); }
.info-list dt { color: var(--c-muted); font-size: 14px; }
.info-list dd { margin: 0; }
.map { min-height: 420px; border-radius: var(--radius); overflow: hidden; background: var(--c-bg-alt); }
.map iframe { width: 100%; height: 100%; min-height: 420px; border: 0; }

.contact-form-section { background: var(--c-bg-alt); }
.page-contact .contact-form-section { background: var(--c-bg-alt); }
.contact-quick { margin-top: 32px; }
.contact-quick li { display: flex; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--c-line); }
.contact-quick span { width: 80px; color: var(--c-muted); font-size: 14px; }

.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; background: var(--c-surface); padding: clamp(24px, 4vw, 44px); border-radius: var(--radius); }
.field { display: flex; flex-direction: column; gap: 6px; }
.field-full, .contact-form .alert, .contact-form .btn { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 500; }
.field em { color: var(--c-primary); font-style: normal; }
.field input, .field textarea, .field select {
    width: 100%; font: inherit; font-size: 15px; padding: 12px 14px; color: var(--c-text);
    background: var(--c-bg); border: 1px solid var(--c-line); border-radius: var(--radius);
    transition: border-color .2s, background .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--c-primary); background: #fff; }
.field textarea { resize: vertical; }
.phone-row { display: grid; grid-template-columns: 110px 1fr; gap: 8px; }
.agree { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--c-muted); cursor: pointer; }
.agree input { margin-top: 5px; accent-color: var(--c-primary); }
.contact-form .btn { justify-self: start; }
.hp { position: absolute !important; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.alert { padding: 14px 16px; border-radius: var(--radius); font-size: 15px; }
.alert-ok { background: #e6f4ea; color: #1e6b34; }
.alert-err { background: #fdecea; color: #a1281b; }
.is-invalid { border-color: #d33 !important; }

/* ---------- Footer ---------- */
.site-footer { background: var(--c-dark); color: rgba(255,255,255,.7); padding: 56px 0; font-size: 14px; }
.footer-inner { display: flex; justify-content: space-between; gap: 32px; align-items: flex-start; }
.logo-footer { color: #fff; }
.footer-info { text-align: right; }
.footer-info p { margin: 0 0 6px; }
.footer-info .sep { margin: 0 8px; opacity: .4; }
.footer-info a:hover { color: #fff; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .clients-list { grid-template-columns: repeat(3, 1fr); row-gap: 28px; }
    .values { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
    :root { --header-h: 64px; --gutter: 16px; }
    .menu-toggle { display: block; }
    .gnb {
        position: fixed; inset: var(--header-h) 0 0 0; background: var(--c-bg); color: var(--c-text);
        flex-direction: column; align-items: flex-start; justify-content: flex-start; gap: 32px;
        padding: 32px var(--gutter); transform: translateX(100%); transition: transform .3s; overflow-y: auto;
    }
    .menu-open .gnb { transform: none; }
    .menu-open .site-header { background: var(--c-bg); color: var(--c-text); }
    .gnb ul { flex-direction: column; gap: 4px; width: 100%; }
    .gnb ul a { display: block; font-size: 22px; padding: 10px 0; }
    .gnb ul a::after { display: none; }
    .gnb ul a.is-active { color: var(--c-primary); }

    .grid-2, .clients-head, .service-cards { grid-template-columns: 1fr; }
    .service-detail.reverse .grid-2 > :first-child { order: 0; }
    .media-portrait { justify-self: start; max-width: 320px; }
    .section-head { flex-direction: column; align-items: flex-start; }
    .contact-form { grid-template-columns: 1fr; }
    .footer-inner { flex-direction: column; }
    .footer-info { text-align: left; }
    .footer-info .sep { display: none; }
    .footer-info p:last-child { display: flex; flex-direction: column; }
    .page-hero { min-height: 400px; padding-bottom: 48px; }
}

@media (max-width: 560px) {
    .clients-list, .values { grid-template-columns: 1fr; }
    .info-list div { grid-template-columns: 90px 1fr; }
    .lead, .hero-lead { font-size: 16px; }
}