:root{
  --navy:#12263f; --navy-2:#1a3355; --teal:#167a78; --teal-on-dark:#5cc6c3; --gold:#d4a24c;
  --bg:#f4f9fb; --mist:#e2f0f6; --surface:#ffffff; --text:#12263f; --muted:#4a5f75; --line:#c9dce6;
  --sans:"Noto Sans KR",system-ui,-apple-system,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  --serif:"Noto Serif KR","Nanum Myeongjo",Georgia,serif;
  color-scheme:light;
  box-sizing:border-box; padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}

html{background:var(--navy);scroll-padding-top:env(safe-area-inset-top,0px);scroll-behavior:smooth}
*,*::before,*::after{box-sizing:border-box}
body{margin:0;font-family:var(--sans);background:var(--bg);color:var(--text);line-height:1.7;font-size:17px;word-break:keep-all}
a{color:inherit}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}
h1,h2,h3,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}

/* header + hero */
.top{background:var(--navy);color:#eaf3f8}
header{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding:20px 0}
.brand{font-weight:700;text-decoration:none;letter-spacing:.02em}
.brand span{font-weight:400;opacity:.8;margin-left:6px}
nav{display:flex;gap:22px;flex-wrap:wrap;font-size:15px}
nav a{text-decoration:none;opacity:.85}
nav a:hover{opacity:1;text-decoration:underline;text-underline-offset:5px}
.hero{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:end;padding:72px 0 88px}
.hero h1{font-family:var(--serif);font-weight:700;font-size:clamp(3.2rem,9vw,6.4rem);line-height:1.02;letter-spacing:-.01em}
.hero h1 span{display:block;animation:rise .7s cubic-bezier(.2,.7,.2,1) both}
.hero h1 span:nth-child(2){animation-delay:.18s;color:var(--teal-on-dark)}
.hero h1 span:nth-child(3){animation-delay:.36s;color:var(--gold)}
@keyframes rise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
.lead{font-size:clamp(1.25rem,2.4vw,1.6rem);font-weight:500;line-height:1.5}
.sub{margin-top:16px;color:#b9cddc;font-size:16px}
.btn{display:inline-block;margin-top:28px;padding:14px 26px;background:var(--gold);color:#12263f;font-weight:700;text-decoration:none;border-radius:4px}
.btn:hover{background:#e3b564}
.btn+.btn{margin-left:12px}
.btn.ghost{background:transparent;color:#eaf3f8;border:1px solid #6b869e}
.btn.ghost:hover{background:#1a3355}
.tag{margin-top:36px;font-size:14px;color:#9fb8cb}

/* sections */
section{padding:84px 0}
section.alt{background:var(--mist)}
h2{font-family:var(--serif);font-weight:700;font-size:clamp(1.6rem,3.6vw,2.4rem);line-height:1.35;max-width:22em}
.intro{margin-top:14px;color:var(--muted);max-width:40em}
.cols{display:grid;gap:32px;margin-top:44px}
.c3{grid-template-columns:repeat(3,1fr)}
.c2{grid-template-columns:repeat(2,1fr);gap:40px 56px}
.item{border-top:3px solid var(--teal);padding-top:18px}
.item .k{font-family:var(--serif);font-size:1.05rem;color:var(--teal);font-weight:700}
.item h3{font-size:1.3rem;line-height:1.4;margin-top:4px}
.item p{margin-top:10px;color:var(--muted);font-size:16px}
.item ul{margin-top:12px;color:var(--muted);font-size:16px}
.item li{position:relative;padding-left:16px;margin-top:4px}
.item li::before{content:"";position:absolute;left:0;top:.8em;width:6px;height:2px;background:var(--gold)}
.note{margin-top:40px;padding:18px 22px;border-left:4px solid var(--gold);background:var(--surface);max-width:46em}
.note b{display:block;margin-bottom:2px}

/* technical */
.tech{display:grid;grid-template-columns:1fr 1.3fr;gap:40px;margin-top:44px;align-items:stretch}
.panel{background:var(--navy);color:#eaf3f8;padding:40px 36px;border-radius:6px;display:flex;flex-direction:column;justify-content:space-between;gap:28px}
.panel h3{font-family:var(--serif);font-size:1.7rem;line-height:1.4}
.panel p{color:#b9cddc}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:28px 32px;align-content:start}
.fields div{border-top:1px solid var(--line);padding-top:14px}
.fields h3{font-size:1.15rem}
.fields p{color:var(--muted);font-size:15px;margin-top:4px}
.fine{margin-top:28px;font-size:14px;color:var(--muted)}

.lang{display:flex;gap:4px;font-size:14px}
.lang button{font:inherit;color:#eaf3f8;background:transparent;border:1px solid #3c566f;padding:4px 12px;border-radius:4px;cursor:pointer}
.lang button[aria-pressed="true"]{background:#eaf3f8;color:#12263f;border-color:#eaf3f8}
html[lang="en"] body{word-break:normal}

/* sequences */
.steps{display:grid;gap:0;margin-top:44px;counter-reset:s}
.s4{grid-template-columns:repeat(4,1fr)}
.s5{grid-template-columns:repeat(5,1fr)}
.steps li{counter-increment:s;padding:0 20px 0 0;position:relative}
.steps li::before{content:counter(s);display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:var(--teal);color:#fff;font-weight:700;font-size:15px;position:relative;z-index:1}
.steps li::after{content:"";position:absolute;left:34px;right:0;top:16px;height:2px;background:var(--line)}
.steps li:last-child::after{display:none}
.steps h3{margin-top:14px;font-size:1.15rem}
.steps p{margin-top:4px;color:var(--muted);font-size:15px}
.goal{margin-top:44px;padding:20px 24px;background:var(--surface);border-radius:6px;font-weight:700}
.goal span{color:var(--teal);margin-right:14px}
.rules{margin-top:48px}
.rules h3.t{font-size:1.1rem;color:var(--teal);font-family:var(--serif)}

/* profile */
.prof{display:grid;grid-template-columns:1fr 1.4fr;gap:48px;margin-top:44px}
.prof h3.t{font-family:var(--serif);font-size:1.1rem;color:var(--teal)}
.prof .edu{margin-top:12px;font-size:1.2rem;font-weight:500;line-height:1.5}
.prof .edu-note{margin-top:10px;color:var(--muted);font-size:16px;max-width:26em}
.career{margin-top:16px}
.career li{position:relative;padding:0 0 20px 24px;border-left:2px solid var(--line);font-size:1.1rem}
.career li:last-child{padding-bottom:0}
.career li::before{content:"";position:absolute;left:-7px;top:.55em;width:12px;height:12px;border-radius:50%;background:var(--teal)}
.career small{display:block;color:var(--muted);font-size:14px}

/* contact */
#contact{background:var(--navy);color:#eaf3f8}
#contact h2{color:#fff}
.contact{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:end}
.card dl{margin:0}
.card dt{font-size:14px;color:#9fb8cb;margin-top:18px}
.card dd{margin:2px 0 0;font-size:1.1rem}
.card a{text-decoration:underline;text-underline-offset:4px}
footer{background:var(--navy);color:#8fa9bd;font-size:14px;padding:0 0 28px}
footer .wrap{border-top:1px solid #2a4260;padding-top:22px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

@media (max-width:860px){
  .hero,.tech,.contact,.prof{grid-template-columns:1fr;gap:36px}
  .hero{padding:48px 0 64px}
  .c3,.c2{grid-template-columns:1fr}
  .s4,.s5{grid-template-columns:1fr;gap:26px}
  .steps li{padding:0 0 0 52px}
  .steps li::before{position:absolute;left:0;top:0}
  .steps li::after{left:16px;right:auto;top:34px;bottom:-26px;width:2px;height:auto}
  .steps h3{margin-top:0}
  section{padding:64px 0}
}
@media (max-width:520px){.fields{grid-template-columns:1fr}.panel{padding:30px 24px}}
@media (prefers-reduced-motion:reduce){.hero h1 span{animation:none}html{scroll-behavior:auto}}

/* ===== design layer ===== */
:root{--navy:#0e2036;--navy-2:#17304e;--teal:#1a7c7a;--gold:#c8a15b;--gold-ink:#94702d;--bg:#f8fafb;--mist:#eef3f6;--line:#d8e2e9;--display:"Cormorant Garamond","Noto Serif KR",Georgia,serif}
body{line-height:1.85;-webkit-font-smoothing:antialiased}
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}
.rv.in{opacity:1;transform:none}

/* header + hero */
.top{background:radial-gradient(900px 480px at 82% -12%,rgba(92,198,195,.17),transparent 60%),radial-gradient(700px 420px at 0% 105%,rgba(200,161,91,.10),transparent 60%),var(--navy)}
header{padding:26px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.brand{font-family:var(--display);font-size:1.6rem;font-weight:600;letter-spacing:.14em}
.brand span{font-family:var(--sans);font-size:.78rem;letter-spacing:.06em;font-weight:400;margin-left:12px;opacity:.7}
nav{gap:30px;font-size:14.5px;letter-spacing:.02em}
.lang a{letter-spacing:.04em;font-size:13px}
.hero{padding:104px 0 128px;gap:72px;align-items:center}
.hero h1{font-family:var(--display);font-weight:500;font-size:clamp(3.8rem,10.5vw,7.6rem);line-height:.96;letter-spacing:-.015em}
.hero h1 span:nth-child(2){font-style:italic}
.hero>div:last-child{border-left:1px solid rgba(255,255,255,.2);padding-left:40px}
.lead{font-family:var(--serif);font-weight:600;font-size:clamp(1.3rem,2.3vw,1.75rem);line-height:1.55}
.sub{margin-top:20px;line-height:1.8}
.btn{border-radius:2px;padding:15px 30px;letter-spacing:.04em;font-size:15px;transition:background .2s,border-color .2s}
.btn.ghost{border-color:rgba(255,255,255,.35)}
.tag{margin-top:44px;letter-spacing:.04em}

/* sections */
section{padding:112px 0}
h1,h2{font-family:var(--serif);font-weight:600;letter-spacing:-.01em;font-size:clamp(1.7rem,3.8vw,2.5rem);line-height:1.35;max-width:22em}
h1::before,h2::before{content:"";display:block;width:44px;height:2px;background:var(--gold);margin-bottom:24px}
.hero h1::before{display:none}
.intro{font-size:1.05rem;margin-top:18px;max-width:38em}
html[lang="en"] section h1,html[lang="en"] section h2{font-family:var(--display);font-weight:600;font-size:clamp(2.1rem,4.6vw,3.1rem);line-height:1.15}
.item{border-top:1px solid var(--line);padding-top:26px}
.item .k{font-family:var(--display);font-style:italic;font-size:1.9rem;font-weight:600;line-height:1.2;color:var(--gold-ink)}
.item h3{font-family:var(--serif);font-weight:600;font-size:1.3rem}
.note{border-left:2px solid var(--gold);background:transparent;padding:4px 0 4px 26px;max-width:46em}
.note b{font-family:var(--serif);font-size:1.1rem}

/* technical */
.panel{border-radius:2px;background:linear-gradient(160deg,var(--navy-2),var(--navy));position:relative;overflow:hidden}
.panel::after{content:"";position:absolute;right:-70px;bottom:-70px;width:200px;height:200px;border:1px solid rgba(200,161,91,.45);border-radius:50%;outline:1px solid rgba(200,161,91,.2);outline-offset:26px}
.panel h3{font-weight:600}
html[lang="en"] .panel h3{font-family:var(--display);font-size:2.2rem;line-height:1.15}
.fields h3{font-family:var(--serif);font-weight:600}

/* sequences */
.steps{gap:28px}
.steps li{padding:22px 0 0;border-top:1px solid var(--line)}
.steps li::before{content:counter(s,decimal-leading-zero);display:block;width:auto;height:auto;border-radius:0;background:none;color:var(--gold-ink);font-family:var(--display);font-size:1.8rem;font-weight:600;font-style:italic;position:static;line-height:1.2}
.steps li::after{display:none}
.steps h3{font-family:var(--serif);font-weight:600;margin-top:6px}
.goal{border-left:2px solid var(--gold);background:transparent;border-radius:0;padding:4px 0 4px 24px;font-family:var(--serif);font-weight:600}
.goal span{color:var(--gold-ink)}
.rules h3.t,.prof h3.t{color:var(--gold-ink)}
.career li::before{background:var(--gold)}

/* home cards */
h1{max-width:22em}
.cards{gap:20px}
.cards .card{background:transparent;border:1px solid var(--line);border-radius:2px;padding:30px 28px;position:relative;transition:opacity .7s ease,transform .25s,border-color .25s,background .25s}
.cards .card:hover{border-color:var(--teal);background:var(--surface);transform:translateY(-4px)}
.cards .card .k{font-family:var(--display);font-style:italic;font-size:1.3rem;color:var(--gold-ink)}
.cards .card strong{font-family:var(--serif);font-weight:600}
.cards .card::after{content:"→";position:absolute;right:26px;top:26px;color:var(--teal);opacity:0;transform:translateX(-6px);transition:.25s}
.cards .card:hover::after{opacity:1;transform:none}
.pager{border-top:1px solid var(--line)}

/* contact */
#contact{background:radial-gradient(800px 420px at 90% 110%,rgba(92,198,195,.13),transparent 60%),var(--navy)}
#contact h1,#contact h2{color:#fff}
.card dd{font-family:var(--serif)}
footer .wrap{border-top:1px solid rgba(255,255,255,.12)}

/* shared */
nav a[aria-current]{opacity:1;text-decoration:underline;text-underline-offset:5px}
.lang a{color:#eaf3f8;text-decoration:none;border:1px solid #3c566f;padding:4px 12px;border-radius:2px}
.lang a[aria-current]{background:#eaf3f8;color:#12263f;border-color:#eaf3f8}
.cards{display:grid;grid-template-columns:repeat(3,1fr);margin-top:44px}
.pager{display:flex;justify-content:space-between;gap:16px;padding-top:28px;padding-bottom:28px;font-weight:700}
.pager a{text-decoration:none;color:var(--teal)}
.pager a.prev::before{content:"←  "}
.pager a.next::after{content:"  →"}
.view[hidden]{display:none}
@media (max-width:860px){
  .cards{grid-template-columns:1fr}
  .hero{padding:56px 0 72px;gap:44px}
  .hero>div:last-child{border-left:0;padding-left:0}
  section{padding:72px 0}
}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}}

/* masthead: logo top right */
header{display:grid;grid-template-columns:1fr auto;grid-template-areas:"brand tools" "nav nav";align-items:center;row-gap:18px}
.brand{grid-area:brand;justify-self:start}
.tools{grid-area:tools;display:flex;align-items:center;gap:22px}
header nav{grid-area:nav;padding-top:16px;border-top:1px solid rgba(255,255,255,.1)}
.logo{display:block;height:50px;aspect-ratio:273/92;background-position:center;background-size:contain;background-repeat:no-repeat}
@media (max-width:860px){
  .brand{display:flex;flex-direction:column;line-height:1.25}
  .brand span{margin:2px 0 0}
  .tools{gap:12px}
  .logo{height:34px}
  header nav{gap:10px 18px}
}

/* logo top left */
.brand{display:flex;flex-direction:row;align-items:center;gap:16px;line-height:1.25}
.brand .logo{opacity:1;margin:0;flex:none}
.brand .bn{font-family:var(--sans);font-size:.9rem;font-weight:500;letter-spacing:.08em;opacity:.8;margin:0}
@media (max-width:860px){.brand{flex-direction:row;gap:10px}.brand .bn{font-size:.78rem}}

/* ===== light theme ===== */
:root{color-scheme:light;--bg:#fbfcfd;--mist:#eef4f8;--line:#d3e0e8;--text:#12263f;--muted:#4d6176}
html{background:var(--bg)}
.top{color:var(--text);background:radial-gradient(900px 480px at 85% -10%,rgba(26,124,122,.12),transparent 60%),radial-gradient(700px 420px at 0% 100%,rgba(200,161,91,.15),transparent 60%),linear-gradient(180deg,#e2f0f6,#f6fafc)}
header{border-bottom-color:var(--line)}
header nav{border-top-color:var(--line)}
.lang a{color:var(--text);border-color:#b9cbd7}
.lang a:hover{background:#fff}
.lang a[aria-current]{background:var(--navy);color:#fff;border-color:var(--navy)}
.hero h1 span:nth-child(1){color:var(--navy)}
.hero h1 span:nth-child(2){color:var(--teal)}
.hero h1 span:nth-child(3){color:#b58a35}
.hero>div:last-child{border-left-color:#b9cbd7}
.sub,.tag{color:var(--muted)}
.btn{background:var(--navy);color:#fff}
.btn:hover{background:var(--teal)}
.btn.ghost{background:transparent;color:var(--navy);border-color:#9fb6c6}
.btn.ghost:hover{background:#fff}
.panel{background:linear-gradient(160deg,#e4f0f6,#f6fafc);color:var(--text);border:1px solid var(--line)}
.panel p{color:var(--muted)}
#contact{background:radial-gradient(800px 420px at 90% 110%,rgba(26,124,122,.10),transparent 60%),var(--mist);color:var(--text)}
#contact h1,#contact h2{color:var(--text)}
.card dt{color:var(--muted)}
footer{background:var(--mist);color:var(--muted)}
footer .wrap{border-top-color:var(--line)}

/* ===== unified background ===== */
:root{--bg:#eef5f9;--mist:#eef5f9}
html,body{background:var(--bg)}
section,section.alt{background:transparent}
.top{background:radial-gradient(900px 480px at 85% -10%,rgba(26,124,122,.12),transparent 60%),radial-gradient(700px 420px at 0% 100%,rgba(200,161,91,.13),transparent 60%),linear-gradient(180deg,#e2f0f6 0%,#eef5f9 100%)}
#contact{background:radial-gradient(800px 420px at 90% 100%,rgba(26,124,122,.10),transparent 60%)}
footer{background:#e4eff5}
.cards .card{background:rgba(255,255,255,.7)}
.cards .card:hover{background:#fff}
.panel{background:linear-gradient(160deg,#ffffff,#f3f8fb)}

/* home: cards without heading */
section .wrap>.cards:first-child{margin-top:0}

/* simple home: hero only, footer pinned to bottom */
body{min-height:100vh;display:flex;flex-direction:column}
.view{display:flex;flex-direction:column;flex:1 0 auto}
body>footer,.view>footer{margin-top:auto}
.pager{width:100%}
.top:has(.hero){flex:1 0 auto;display:flex;flex-direction:column}
.top:has(.hero)>.wrap{flex:1;display:flex;flex-direction:column;width:100%}
.top:has(.hero) .hero{flex:1}
.logo{background-image:url(assets/chl-logo.png)}