:root{--blue:#1a73e8;--blue-d:#1765cc;--ink:#1b2437;--sub:#5b6472;
 --line:#e2e7f0;--bg:#f5f7fb;--surf:#fff;--ok:#1e8e3e;--err:#d93025;
 --d:#1a73e8;--e:#9334e6;--n:#202124;
 /* 교대 색 언어(단일 출처) — 그리드 알약·범례·시안 공통 */
 --shift-d-bg:#dbe8ff;--shift-d-fg:#1456c4;--shift-e-bg:#ece0ff;--shift-e-fg:#7322d6;
 --shift-n-bg:#dfe4ee;--shift-n-fg:#2b3550;--shift-off:#c5ccd8;
 /* 모던 레이어드 그림자 스케일 — 카드 / 띄움 / 팝오버·모달 */
 --sh1:0 1px 2px rgba(16,24,40,.05),0 2px 10px rgba(16,24,40,.05);
 --sh2:0 2px 4px rgba(16,24,40,.06),0 8px 22px rgba(16,24,40,.10);
 --sh3:0 18px 48px rgba(16,24,40,.20),0 4px 12px rgba(16,24,40,.08);
 --font:'Pretendard Variable',Pretendard,-apple-system,BlinkMacSystemFont,'Malgun Gothic','Apple SD Gothic Neo',sans-serif}
*{box-sizing:border-box}
body{margin:0;color:var(--ink);background:var(--bg);
 font-family:var(--font);
 line-height:1.6;-webkit-font-smoothing:antialiased;
 /* 짧은 페이지에서 푸터 아래 회색 여백이 뜨지 않도록 푸터를 화면 하단에 고정 */
 min-height:100vh;display:flex;flex-direction:column}
a{color:var(--blue);text-decoration:none} a:hover{text-decoration:underline}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;
 padding:0 28px;background:rgba(255,255,255,.85);border-bottom:1px solid rgba(27,36,55,.07);
 -webkit-backdrop-filter:saturate(180%) blur(14px);backdrop-filter:saturate(180%) blur(14px);
 position:sticky;top:0;z-index:30}
.nav .brand{font-weight:800;font-size:20px;letter-spacing:-.015em;white-space:nowrap}
.nav .navright{display:flex;align-items:center;gap:16px;margin-left:auto}
.nav .links{display:flex;gap:6px;align-items:center;font-size:14px;font-weight:600}
.nav .links a:not(.btn){color:#414b5e;padding:8px 12px;border-radius:10px;transition:background .13s,color .13s}
.nav .links a:not(.btn):hover{background:rgba(27,36,55,.06);color:var(--ink);text-decoration:none}
.nav .links a.btn{margin-left:8px}
.nav .visits{font-size:13px;color:var(--sub);font-weight:700;display:inline-flex;align-items:center;gap:4px;white-space:nowrap}
.nav .visits b{color:var(--blue-d)}
.nav .navtoggle{display:none;background:none;border:0;font-size:23px;line-height:1;cursor:pointer;color:var(--ink);padding:2px 8px;border-radius:8px}
.nav .navtoggle:hover{background:#f1f3f4}
/* 모바일: 링크를 햄버거(☰) 드롭다운으로 — 좁은 화면 줄바꿈 깨짐 방지 */
@media(max-width:600px){
 .nav .navtoggle{display:block}
 .nav .links{position:absolute;top:calc(100% + 2px);right:8px;left:8px;flex-direction:column;align-items:stretch;
  background:var(--surf);border:1px solid var(--line);border-radius:14px;box-shadow:0 10px 30px rgba(60,64,67,.22);
  padding:8px;gap:2px;display:none;z-index:40}
 .nav.open .links{display:flex}
 .nav .links a{padding:12px 14px;border-radius:9px;white-space:nowrap;font-size:15px;font-weight:600}
 .nav .links a:hover{background:#f1f3f4;text-decoration:none}
 .nav .links a.btn{margin-top:6px;text-align:center;color:#fff}
 .nav .navright{gap:10px}
}
@media(max-width:560px){.nav .visits{font-size:11px;gap:2px}}
.btn{background:linear-gradient(180deg,#3b8bff,#1a73e8);color:#fff;border:0;border-radius:24px;padding:10px 22px;
 font-weight:600;font-size:14px;cursor:pointer;display:inline-block;
 transition:box-shadow .15s,transform .15s,filter .15s;
 box-shadow:0 1px 2px rgba(26,115,232,.30),inset 0 1px 0 rgba(255,255,255,.16);
 font-family:inherit}
.btn:hover{filter:brightness(1.05);box-shadow:0 4px 14px rgba(26,115,232,.35),inset 0 1px 0 rgba(255,255,255,.16);
 transform:translateY(-1px);text-decoration:none}
.btn.lg{padding:13px 30px;font-size:15px} .btn:disabled{background:#e3e7ee;color:#9aa0a6;cursor:not-allowed;box-shadow:none;transform:none;filter:none}
.btn.tonal{background:#e8f0fe;color:var(--blue-d);box-shadow:none} .btn.tonal:hover{background:#d2e3fc;box-shadow:none;filter:none;transform:none}
.btn.ghost{background:#fff;color:var(--blue-d);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{filter:none;transform:none;box-shadow:var(--sh1);background:#fbfcfe}
.container{max-width:1080px;margin:0 auto;padding:28px 22px;width:100%}
.muted{color:var(--sub)} .card{background:var(--surf);border:1px solid var(--line);
 border-radius:16px;padding:18px 20px;box-shadow:var(--sh1)}
.footer{text-align:center;color:#5f6368;font-size:13px;padding:34px;
 border-top:1px solid var(--line);margin-top:auto;background:var(--surf)}
.footer a{color:#5f6368}
/* a11y: 키보드 포커스 가시성(WCAG 2.4.7/2.4.11) — 마우스 클릭엔 안 뜨고 키보드에만 */
:focus-visible{outline:3px solid #1a73e8;outline-offset:2px}
a:focus-visible,button:focus-visible,.btn:focus-visible,input:focus-visible,
select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid #1a73e8;outline-offset:2px}
/* 폼 컨트롤: 모던 포커스 링(테두리+halo). 키보드 outline과 병행 무해 */
input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3.5px rgba(26,115,232,.14)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
 clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media (prefers-reduced-motion: reduce){*{animation-duration:.001ms!important;
 transition-duration:.001ms!important;scroll-behavior:auto!important}}
@keyframes fadeup{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@keyframes pop{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:none}}
.container:not(.hide){animation:fadeup .28s cubic-bezier(.2,.7,.2,1)}
.modal-card{animation:pop .18s ease} .okbar{animation:fadeup .3s ease}
.card{transition:box-shadow .15s,transform .15s}
.card:hover{box-shadow:var(--sh2)}
.btn:active{transform:scale(.97)} .acc-body{animation:fadeup .2s ease}
.step{animation:fadeup .25s ease}
.stepper{display:flex;align-items:center;gap:6px;margin:8px 0 18px;flex-wrap:wrap}
.stepper .sd{display:flex;align-items:center;gap:8px;color:var(--sub);font-size:14px;font-weight:600}
.stepper .sd .no{width:24px;height:24px;border-radius:50%;background:#e8eaed;color:var(--sub);display:flex;align-items:center;justify-content:center;font-size:13px}
.stepper .sd.on{color:var(--blue-d)} .stepper .sd.on .no{background:var(--blue);color:#fff}
.stepper .sd.done .no{background:#e6f4ea;color:#1e8e3e} .stepper .ln{flex:1;height:2px;background:#e8eaed;min-width:18px;max-width:60px}
.stepnav{display:flex;gap:10px;align-items:center;margin-top:18px}
@media(max-width:560px){
 .container{padding:20px 14px}
 .nav{padding:0 14px;height:56px} .nav .brand{font-size:18px}
 .nav a.cta{padding:9px 15px;font-size:13px}
 .stepper .sd span:not(.no){display:none}
}