/* ============================================================
   ONESTRE GLOBAL — Design System
   Base: White + Black (요청) / Accent: Navy (로고) + Gold point
   ============================================================ */
:root{
  --navy:#16215C;        /* 로고 딥네이비 */
  --navy-700:#1B2A6B;
  --navy-500:#2B3C8C;
  --navy-tint:#F5F6FA;   /* 옅은 배경 */
  --ink:#111317;         /* 본문 거의 블랙 */
  --gray:#5B6171;
  --line:#E6E8EF;
  --gold:#C6A45C;        /* 프리미엄 포인트(소량) */
  --white:#ffffff;
  --maxw:1200px;
  --serif:"Cormorant Garamond",Georgia,"Times New Roman",serif;
  --sans:"Pretendard","Pretendard Variable",-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 10px 40px -12px rgba(22,33,92,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);color:var(--ink);background:var(--white);line-height:1.7;
  font-size:17px;letter-spacing:-.01em;overflow-x:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{padding:104px 0}
@media(max-width:768px){section{padding:68px 0}body{font-size:16px}}

/* Typography */
h1,h2,h3{line-height:1.18;letter-spacing:-.02em;font-weight:700}
.display{font-family:var(--serif);font-weight:700;letter-spacing:0}
.eyebrow{font-family:var(--serif);font-style:italic;color:var(--navy-500);
  font-size:1.25rem;margin-bottom:14px;letter-spacing:.02em}
.sec-title{font-size:clamp(1.9rem,4.2vw,2.9rem);color:var(--navy);margin-bottom:18px}
.sec-lead{color:var(--gray);max-width:660px;font-size:1.05rem}
.center{text-align:center}.center .sec-lead{margin:0 auto}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:9px;padding:15px 30px;border-radius:999px;
  font-weight:600;font-size:1rem;transition:.28s var(--ease);cursor:pointer;border:1.5px solid transparent;white-space:nowrap}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:var(--navy-700);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-outline{border-color:var(--navy);color:var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn .ar{transition:transform .28s var(--ease)}
.btn:hover .ar{transform:translateX(4px)}

/* Header */
header{position:fixed;top:0;left:0;right:0;z-index:100;transition:.3s var(--ease);
  padding:18px 0;background:transparent}
header.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);
  box-shadow:0 1px 0 var(--line);padding:12px 0}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;color:#fff;transition:.3s}
header.scrolled .brand{color:var(--navy)}
.brand .mark{width:40px;height:40px;border-radius:9px;background:var(--navy);color:#fff;
  font-family:var(--serif);font-weight:700;font-size:1.35rem;display:grid;place-items:center;flex:0 0 auto}
header.scrolled .brand .mark{box-shadow:0 4px 14px -4px rgba(22,33,92,.4)}
.brand b{font-size:1.12rem;letter-spacing:-.02em;line-height:1}
.brand span{display:block;font-size:.62rem;font-weight:500;letter-spacing:.18em;opacity:.7;font-family:var(--serif)}
.menu{display:flex;align-items:center;gap:30px}
.menu a{font-size:.95rem;font-weight:500;color:rgba(255,255,255,.92);transition:.2s}
header.scrolled .menu a{color:var(--ink)}
.menu a:hover{color:var(--gold)}
.nav-right{display:flex;align-items:center;gap:14px}

/* Language switch */
.lang{display:flex;gap:2px;align-items:center;border:1px solid rgba(255,255,255,.4);border-radius:999px;padding:3px;background:rgba(255,255,255,.08)}
header.scrolled .lang{border-color:var(--line);background:#fff}
.lang button{background:none;border:0;cursor:pointer;font-size:.78rem;font-weight:600;
  color:rgba(255,255,255,.8);padding:5px 9px;border-radius:999px;transition:.2s;font-family:var(--sans)}
header.scrolled .lang button{color:var(--gray)}
.lang button.active{background:var(--navy);color:#fff!important}
.nav-cta{display:inline-flex}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.burger span{width:24px;height:2px;background:#fff;transition:.3s}
header.scrolled .burger span{background:var(--navy)}

/* Hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;color:#fff;overflow:hidden;background:var(--navy)}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;display:block}
.hero-bg::after{content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(110deg,rgba(13,20,56,.92) 0%,rgba(18,27,80,.82) 45%,rgba(22,33,92,.55) 100%)}
.hero-inner{position:relative;z-index:2;padding:140px 0 90px;max-width:820px}
.hero .eyebrow{color:var(--gold);font-size:1.1rem}
.hero h1{font-family:var(--serif);font-size:clamp(2.8rem,7vw,5.2rem);line-height:1.05;
  letter-spacing:0;margin-bottom:22px;text-transform:uppercase}
.hero .sub{font-size:clamp(1.05rem,2.4vw,1.35rem);color:rgba(255,255,255,.9);max-width:640px;margin-bottom:36px;font-weight:400}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.trustbar{display:flex;gap:26px;flex-wrap:wrap;margin-top:48px;padding-top:30px;border-top:1px solid rgba(255,255,255,.18)}
.trustbar div{font-size:.9rem;color:rgba(255,255,255,.85)}
.trustbar b{display:block;font-family:var(--serif);font-size:1.7rem;color:#fff;font-weight:700;line-height:1}
.scroll-ind{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);z-index:1;
  color:rgba(255,255,255,.6);font-size:.72rem;letter-spacing:.2em;animation:bob 2s infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* About */
.about{background:#fff}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-grid .media{position:relative}
.about-grid .media img{border-radius:16px;box-shadow:var(--shadow)}
.about-grid .media .badge{position:absolute;left:-18px;bottom:-18px;background:var(--navy);color:#fff;
  padding:18px 22px;border-radius:14px;font-family:var(--serif);font-style:italic;font-size:1.15rem;box-shadow:var(--shadow)}
.story p{color:var(--gray);margin-bottom:18px}
.story .quote{font-family:var(--serif);font-style:italic;font-size:1.35rem;color:var(--navy);
  border-left:3px solid var(--gold);padding-left:18px;margin:8px 0 22px}
@media(max-width:860px){.about-grid{grid-template-columns:1fr;gap:40px}}

/* Services */
.services{background:var(--navy-tint)}
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:48px}
.svc{background:#fff;border:1px solid var(--line);border-radius:18px;padding:38px 34px;transition:.3s var(--ease)}
.svc:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.svc .no{font-family:var(--serif);font-size:1.05rem;color:var(--gold);font-weight:700;letter-spacing:.05em}
.svc h3{font-size:1.4rem;color:var(--navy);margin:10px 0 12px}
.svc p{color:var(--gray);font-size:.98rem;margin-bottom:16px}
.svc ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.svc li{font-size:.82rem;color:var(--navy-700);background:var(--navy-tint);padding:5px 12px;border-radius:999px}
@media(max-width:768px){.svc-grid{grid-template-columns:1fr}}

/* Process */
.process{background:#fff}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:50px;counter-reset:s}
.step{text-align:center;position:relative;padding-top:14px}
.step::before{counter-increment:s;content:counter(s);display:grid;place-items:center;
  width:54px;height:54px;margin:0 auto 16px;border-radius:50%;background:var(--navy);color:#fff;
  font-family:var(--serif);font-size:1.4rem;font-weight:700}
.step h4{font-size:1.02rem;color:var(--navy);margin-bottom:6px}
.step p{font-size:.85rem;color:var(--gray)}
.step:not(:last-child)::after{content:"";position:absolute;top:27px;left:60%;width:80%;height:2px;
  background:var(--line);z-index:-1}
@media(max-width:768px){.steps{grid-template-columns:repeat(2,1fr);gap:28px 14px}.step:not(:last-child)::after{display:none}}

/* Why */
.why{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.why .mono{position:absolute;right:-4%;top:50%;transform:translateY(-50%);font-family:var(--serif);
  font-size:34rem;color:rgba(255,255,255,.03);font-weight:700;pointer-events:none;line-height:1}
.why .sec-title{color:#fff}.why .sec-lead{color:rgba(255,255,255,.75)}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.12);border-radius:18px;overflow:hidden;margin-top:48px;position:relative}
.why-item{background:var(--navy);padding:36px 30px}
.why-item .n{font-family:var(--serif);font-size:2.8rem;font-weight:700;color:var(--gold);line-height:1}
.why-item .n small{font-size:1.3rem}
.why-item h4{font-size:1.12rem;margin:12px 0 8px}
.why-item p{font-size:.92rem;color:rgba(255,255,255,.72)}
@media(max-width:860px){.why-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.why-grid{grid-template-columns:1fr}}

/* Portfolio / 실적 */
.work{background:var(--navy-tint)}
.work-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px}
.work-card{background:#fff;border-radius:18px;overflow:hidden;border:1px solid var(--line);transition:.3s var(--ease)}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.work-card .ph{aspect-ratio:4/3;overflow:hidden;background:var(--navy-tint)}
.work-card .ph img{width:100%;height:100%;object-fit:cover;transition:.5s var(--ease)}
.work-card:hover .ph img{transform:scale(1.05)}
.work-card .body{padding:22px 24px}
.work-card .tag{font-size:.78rem;color:var(--gold);font-weight:700;letter-spacing:.05em}
.work-card h4{font-size:1.15rem;color:var(--navy);margin:6px 0}
.work-card p{font-size:.9rem;color:var(--gray)}
@media(max-width:860px){.work-grid{grid-template-columns:1fr}}

/* Trust / certification */
.trust{background:#fff}
.trust-grid{display:grid;grid-template-columns:240px 1fr;gap:56px;align-items:center;
  background:var(--navy-tint);border-radius:22px;padding:48px}
.trust-grid .cert{display:flex;justify-content:center}
.trust-grid .cert img{width:100%;max-width:240px;height:auto;border-radius:12px;background:#fff;padding:10px;box-shadow:var(--shadow)}
.biz-info{display:grid;grid-template-columns:1fr 1fr;gap:18px 30px;margin-top:22px}
.biz-info div{font-size:.92rem}
.biz-info dt{color:var(--gray);font-size:.78rem;margin-bottom:2px}
.biz-info dd{color:var(--ink);font-weight:600}
@media(max-width:768px){.trust-grid{grid-template-columns:1fr;padding:32px;gap:30px;text-align:center}
  .trust-grid .cert img{margin:0 auto}.biz-info{grid-template-columns:1fr;text-align:left}}

/* CTA banner */
.cta-band{background:linear-gradient(120deg,var(--navy) 0%,var(--navy-500) 100%);color:#fff;text-align:center}
.cta-band h2{font-family:var(--serif);font-size:clamp(2rem,5vw,3.2rem);margin-bottom:16px}
.cta-band p{color:rgba(255,255,255,.85);max-width:560px;margin:0 auto 32px}

/* Contact */
.contact{background:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;margin-top:48px}
.contact-info .ci{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.contact-info .ci:last-child{border:0}
.contact-info .ic{width:46px;height:46px;border-radius:12px;background:var(--navy-tint);color:var(--navy);
  display:grid;place-items:center;flex:0 0 auto;font-size:1.2rem}
.contact-info dt{font-size:.78rem;color:var(--gray)}
.contact-info dd{font-weight:600;font-size:1.02rem}
.contact-info a:hover{color:var(--navy)}
form{background:var(--navy-tint);border-radius:20px;padding:36px}
.field{margin-bottom:18px}
.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:7px;color:var(--navy)}
.field input,.field select,.field textarea{width:100%;padding:13px 16px;border:1px solid var(--line);
  border-radius:11px;font-family:inherit;font-size:.98rem;background:#fff;transition:.2s;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--navy-500);box-shadow:0 0 0 3px rgba(43,60,140,.12)}
.field textarea{resize:vertical;min-height:120px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
form .btn-primary{width:100%;justify-content:center;margin-top:6px}
.form-note{font-size:.78rem;color:var(--gray);margin-top:12px;text-align:center}
.form-msg{display:none;padding:14px;border-radius:11px;margin-top:14px;font-size:.92rem;text-align:center}
.form-msg.ok{display:block;background:#E8F5EC;color:#1B7A3D}
.form-msg.err{display:block;background:#FCEAEA;color:#B33}
@media(max-width:860px){.contact-grid{grid-template-columns:1fr;gap:36px}.row2{grid-template-columns:1fr}}

/* Map */
.map{margin-top:0}
.map iframe{width:100%;height:380px;border:0;display:block}

/* Footer */
footer{background:#0D1438;color:rgba(255,255,255,.7);padding:64px 0 30px}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand .brand{color:#fff;margin-bottom:16px}
.foot-brand p{font-size:.9rem;max-width:320px}
.foot-col h5{color:#fff;font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:16px}
.foot-col a,.foot-col p{display:block;font-size:.92rem;margin-bottom:10px;transition:.2s}
.foot-col a:hover{color:#fff}
.foot-bot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-top:24px;font-size:.82rem;color:rgba(255,255,255,.45)}
.foot-bot a:hover{color:#fff}
.foot-links{display:flex;gap:18px}
.foot-credit{text-align:center;padding-top:18px;font-size:.78rem;color:rgba(255,255,255,.35)}
.foot-credit a{transition:.2s}
.foot-credit a:hover{color:var(--gold)}
@media(max-width:768px){.foot-top{grid-template-columns:1fr;gap:30px}}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(28px);transition:.7s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.scroll-ind{animation:none}}

/* Mobile menu */
@media(max-width:980px){
  .menu{position:fixed;inset:0 0 0 auto;width:min(82vw,340px);background:#fff;flex-direction:column;
    justify-content:center;gap:26px;transform:translateX(100%);transition:.35s var(--ease);box-shadow:-10px 0 40px rgba(0,0,0,.1);padding:40px}
  .menu.open{transform:none}
  .menu a{color:var(--navy)!important;font-size:1.15rem}
  .burger{display:flex}
  .nav-cta{display:none}
  .menu .nav-cta{display:inline-flex;margin-top:10px}
}