:root{
  --bg:#fff;--bg-alt:#fff6f2;--ink:#1b1b1f;--ink-2:#55565f;--line:#ece7e4;
  --main:#e8380d;--main-d:#c22c06;--main-soft:#ffe9e1;--gold:#ffb703;--ok:#0f8a5f;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:"Pretendard Variable",Pretendard,-apple-system,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;font-size:16px;line-height:1.65;word-break:keep-all}
a{color:inherit}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
b{font-weight:700}

.topbar{background:#1b1b1f;color:#ffd166;font-size:13px;font-weight:700;text-align:center;padding:7px 12px;line-height:1.4}
.top{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:16px;height:56px}
.logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:19px;text-decoration:none;letter-spacing:-.02em}
.logo-mark{display:grid;place-items:center;width:28px;height:28px;border-radius:8px;background:var(--main);color:#fff;font-size:16px}
.nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{white-space:nowrap;text-decoration:none;font-size:14px;color:var(--ink-2);padding:6px 9px;border-radius:8px}
.nav a:hover{background:var(--main-soft);color:var(--main-d)}

.hero{background:linear-gradient(160deg,#ff5a1f 0%,#e8380d 55%,#b8240a 100%);color:#fff;padding:44px 0 40px}
.badge{display:inline-block;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.35);padding:4px 12px;border-radius:99px;font-size:13px;font-weight:600}
.hero h1{font-size:clamp(28px,7vw,40px);line-height:1.25;letter-spacing:-.03em;margin:14px 0 12px;font-weight:800}
.lead{font-size:16.5px;opacity:.95;max-width:600px}
.period{display:grid;gap:8px;margin:20px 0 22px;background:rgba(0,0,0,.14);border-radius:12px;padding:14px 16px}
.period div{display:flex;gap:12px;font-size:15px}
.period dt{min-width:56px;opacity:.8}
.period dd{font-weight:600}
.hero-cta{display:flex;gap:10px;flex-wrap:wrap}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:12px;font-weight:700;font-size:16px;text-decoration:none;border:0;cursor:pointer;font-family:inherit}
.btn-main{background:var(--gold);color:#1b1b1f}
.btn-main:hover{filter:brightness(.96)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.7)}
.sec .btn-main{background:var(--main);color:#fff}
.btn-wide{width:100%}

.sec{padding:44px 0}
.sec-alt{background:var(--bg-alt)}
.sec h2{font-size:clamp(22px,5.5vw,28px);letter-spacing:-.03em;line-height:1.3;margin-bottom:8px}
.sec h3{font-size:19px;margin:30px 0 12px;letter-spacing:-.02em}
.sub{color:var(--ink-2);margin-bottom:20px}
.note{font-size:14px;color:var(--ink-2);margin-top:14px}

.codes{display:grid;gap:10px}
.code{display:grid;grid-template-columns:1fr auto;gap:6px 12px;align-items:center;border:1px solid var(--line);border-radius:var(--radius);padding:16px;background:#fff}
.code.best{border-color:var(--main);box-shadow:0 0 0 2px var(--main-soft)}
.code-amt{font-size:15px;color:var(--ink-2)}
.code-amt b{color:var(--ink);font-size:17px}
.code-amt small{display:block;font-size:13px;color:var(--ink-2)}
.code-off{font-size:24px;font-weight:800;color:var(--main);letter-spacing:-.02em;line-height:1.2}
.code-off small{display:block;font-size:13px;font-weight:600;color:var(--ink-2);margin-top:2px}
.copy{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:0 14px;border-radius:10px;border:1.5px dashed var(--main);background:var(--main-soft);color:var(--main-d);font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:700;font-size:16px;cursor:pointer}
.copy:after{content:"복사";font-family:"Pretendard Variable",sans-serif;font-size:12px;font-weight:600;background:var(--main);color:#fff;border-radius:6px;padding:2px 6px}
.copy.done:after{content:"완료";background:var(--ok)}
.code-main{grid-row:1/3;grid-column:2;align-self:center}
.reveal{display:inline-flex;align-items:stretch;min-height:46px;border:0;padding:0;border-radius:10px;overflow:hidden;cursor:pointer;font-family:inherit;box-shadow:0 2px 0 var(--main-d)}
.reveal .mask{display:flex;align-items:center;padding:0 10px;background:var(--main-soft);color:var(--main-d);border:1.5px dashed var(--main);border-right:0;border-radius:10px 0 0 10px;font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:700;font-size:15px;letter-spacing:.02em}
.reveal .lbl{display:flex;align-items:center;padding:0 12px;background:var(--main);color:#fff;font-weight:800;font-size:14.5px;white-space:nowrap}
.reveal:hover .lbl{background:var(--main-d)}
.reveal.sm{min-height:36px;vertical-align:middle;margin:2px 0}
.reveal.sm .mask{font-size:13px;padding:0 8px}
.reveal.sm .lbl{font-size:13px;padding:0 9px}
.modal{position:fixed;inset:0;z-index:30;display:grid;place-items:center;padding:16px}
.modal[hidden]{display:none}
.modal-bg{position:absolute;inset:0;background:rgba(15,15,20,.55)}
.modal-box{position:relative;width:100%;max-width:400px;background:#fff;border-radius:20px;padding:26px 20px 18px;text-align:center;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.modal-x{position:absolute;right:10px;top:8px;width:40px;height:40px;border:0;background:none;font-size:26px;color:var(--ink-2);cursor:pointer}
.m-tag{font-size:14px;font-weight:700;color:var(--main-d)}
.m-code{margin:12px 0 16px;padding:16px;border:2px dashed var(--main);border-radius:14px;background:var(--main-soft);font-family:ui-monospace,Menlo,Consolas,monospace;font-size:30px;font-weight:800;letter-spacing:.08em;color:var(--ink);user-select:all}
.modal-box .btn{margin-top:8px}
.modal-box .btn-main{background:var(--main);color:#fff}
.btn-line{background:#fff;color:var(--ink);border:1.5px solid var(--line)}
.m-alt{margin-top:14px;font-size:13px;color:var(--ink-2)}
.m-alt .copy{min-height:32px;font-size:13px;padding:0 9px;border-width:1px;margin-left:4px}
.m-how{margin-top:10px;font-size:13.5px}
body.noscroll{overflow:hidden}
.alts{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13px;color:var(--ink-2);border-top:1px dashed var(--line);padding-top:10px;margin-top:4px}
.alts .copy{min-height:34px;font-size:13px;padding:0 10px;border-width:1px}
.alts .copy:after{font-size:11px}

.go-box{margin-top:22px;padding:18px;border-radius:var(--radius);background:var(--bg-alt)}
.disclose{font-size:12.5px;color:var(--ink-2);margin-top:10px;text-align:center}

.calc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.unit{display:inline-flex;background:#f3efed;border-radius:10px;padding:3px;margin-bottom:14px}
.unit button{border:0;background:transparent;padding:8px 14px;border-radius:8px;font-family:inherit;font-size:14px;font-weight:600;color:var(--ink-2);cursor:pointer}
.unit button.on{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.field{display:block;margin-bottom:14px}
.field span{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.field input{width:100%;height:52px;border:1.5px solid var(--line);border-radius:12px;padding:0 14px;font-size:20px;font-family:inherit;font-weight:700}
.field input:focus{outline:none;border-color:var(--main)}
.field small{display:block;font-size:12.5px;color:var(--ink-2);margin-top:6px}
.result{border-radius:12px;background:var(--bg-alt);padding:16px}
.muted{color:var(--ink-2);font-size:15px}
.r-code{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.r-big{font-size:22px;font-weight:800;color:var(--main);letter-spacing:-.02em}
.r-line{font-size:15px;margin-top:4px}
.r-tip{margin-top:12px;padding:12px;border-radius:10px;background:#fff;border:1px solid var(--line);font-size:15px}
.r-tip.good{border-color:var(--ok);background:#effaf5}
.r-tip.good b{color:var(--ok)}

.steps{list-style:none;counter-reset:s;display:grid;gap:10px}
.steps li{counter-increment:s;position:relative;padding:14px 14px 14px 56px;border:1px solid var(--line);border-radius:var(--radius)}
.steps li:before{content:counter(s);position:absolute;left:14px;top:14px;width:30px;height:30px;border-radius:50%;background:var(--main);color:#fff;display:grid;place-items:center;font-weight:800}
.steps b{display:block;font-size:16.5px}
.steps span{color:var(--ink-2);font-size:15px}
.layers{display:grid;gap:8px}
.layers div{display:flex;flex-direction:column;padding:12px 14px;border-radius:12px;background:#f7f5f4}
.layers div.hl{background:var(--main-soft);outline:1.5px solid var(--main)}
.layers span{font-size:14px;color:var(--ink-2)}

.checks{list-style:none;display:grid;gap:10px}
.checks li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;font-size:15px;color:var(--ink-2)}
.checks b{display:block;color:var(--ink);font-size:16.5px;margin-bottom:2px}

details{border-bottom:1px solid var(--line);padding:4px 0}
summary{cursor:pointer;font-weight:700;padding:12px 28px 12px 0;list-style:none;position:relative}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";position:absolute;right:4px;top:10px;font-size:20px;color:var(--main)}
details[open] summary:after{content:"−"}
details p{color:var(--ink-2);padding:0 0 14px;font-size:15px}

.foot{background:#1b1b1f;color:#b9b9c2;padding:30px 0 40px;font-size:13px}
.foot p{margin-bottom:10px}
.foot b{color:#fff}
.foot a{color:#fff}

.toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%) translateY(20px);background:#1b1b1f;color:#fff;padding:12px 18px;border-radius:12px;font-size:14px;opacity:0;transition:.2s;pointer-events:none;z-index:20;max-width:calc(100% - 32px);text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

.doc{padding:36px 0 50px}
.doc h1{font-size:26px;margin-bottom:16px}
.doc h2{font-size:18px;margin:24px 0 8px}
.doc p,.doc li{color:var(--ink-2);font-size:15px}
.doc ul{padding-left:20px}

@media (min-width:640px){
  .code{grid-template-columns:200px 1fr auto}
  .code-amt{grid-row:1/3}
  .code-main{grid-column:3}
  .layers{grid-template-columns:repeat(4,1fr)}
}
@media (max-width:420px){
  .nav a:nth-child(n+4){display:none}
}
.sub-page .sec:first-child{padding-top:32px}
.more-links{display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}
.more-links a{display:block;padding:14px 16px;border-radius:12px;background:#fff;border:1px solid var(--line);text-decoration:none;font-weight:700}
.more-links a:hover{border-color:var(--main);color:var(--main-d)}

/* ===== 광택 버튼 (11/2) ===== */
.logo-mark{background:url(/icon-192.png) center/cover no-repeat;color:transparent;font-size:0;border-radius:8px;box-shadow:0 1px 3px rgba(194,44,6,.35)}
.btn{position:relative;overflow:hidden;isolation:isolate;transition:transform .12s ease,box-shadow .12s ease,filter .12s ease}
.btn:active{transform:translateY(2px)}
/* 금색 메탈 */
.btn-main{
  background:linear-gradient(180deg,#fff4b8 0%,#ffd84a 22%,#ffc21a 52%,#f0a000 78%,#ffcf3d 100%);
  color:#4a2c00;text-shadow:0 1px 0 rgba(255,250,220,.7);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.9),inset 0 -2px 0 rgba(160,95,0,.35),0 4px 0 #b77300,0 8px 18px rgba(120,60,0,.35);
  border:1px solid #d48c00
}
.btn-main:hover{filter:brightness(1.05) saturate(1.1);transform:translateY(-1px)}
.btn-main:active{box-shadow:inset 0 1px 0 rgba(255,255,255,.8),0 1px 0 #b77300,0 3px 8px rgba(120,60,0,.3)}
/* 윗면 광택 */
.btn-main::before,.reveal .lbl::before{content:"";position:absolute;left:0;right:0;top:0;height:50%;background:linear-gradient(180deg,rgba(255,255,255,.55),rgba(255,255,255,.08));border-radius:inherit;z-index:-1;pointer-events:none}
/* 스치는 빛 */
.btn-main::after,.reveal .lbl::after{content:"";position:absolute;top:-20%;bottom:-20%;left:-60%;width:40%;background:linear-gradient(105deg,transparent 0%,rgba(255,255,255,.75) 50%,transparent 100%);transform:skewX(-20deg);animation:shine 3.2s ease-in-out infinite;pointer-events:none}
@keyframes shine{0%,62%{left:-60%}100%{left:130%}}
/* 빨간 버튼(코드표 아래·코드 창) */
.sec .btn-main,.modal-box .btn-main{
  background:linear-gradient(180deg,#ff8a5c 0%,#ff5a26 30%,#e8380d 65%,#c92d05 100%);
  color:#fff;text-shadow:0 1px 1px rgba(120,20,0,.45);border:1px solid #b52a04;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.5),0 4px 0 #9c2403,0 8px 18px rgba(200,50,10,.35)
}
.sec .btn-main:active,.modal-box .btn-main:active{box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 1px 0 #9c2403,0 3px 8px rgba(200,50,10,.3)}
/* 흰 테두리 버튼은 유리 느낌 */
.btn-ghost{background:linear-gradient(180deg,rgba(255,255,255,.22),rgba(255,255,255,.06));border:1.5px solid rgba(255,255,255,.75);box-shadow:inset 0 1px 0 rgba(255,255,255,.45),0 4px 12px rgba(120,20,0,.18);backdrop-filter:blur(4px)}
.btn-ghost:hover{background:linear-gradient(180deg,rgba(255,255,255,.32),rgba(255,255,255,.12));transform:translateY(-1px)}
/* 코드 보기 버튼 */
.reveal{box-shadow:0 3px 0 #9c2403,0 6px 14px rgba(200,50,10,.25);transition:transform .12s ease,box-shadow .12s ease}
.reveal:hover{transform:translateY(-1px)}
.reveal:active{transform:translateY(2px);box-shadow:0 1px 0 #9c2403,0 2px 6px rgba(200,50,10,.2)}
.reveal .mask{background:repeating-linear-gradient(135deg,#fff3ee 0 8px,#ffe6dc 8px 16px)}
.reveal .lbl{position:relative;overflow:hidden;isolation:isolate;background:linear-gradient(180deg,#ff7a45 0%,#f04a17 45%,#d63306 100%);text-shadow:0 1px 1px rgba(120,20,0,.4)}
.reveal:hover .lbl{background:linear-gradient(180deg,#ff8752 0%,#f45520 45%,#dc3a0b 100%)}
.reveal .lbl::after{animation-duration:4s}
.code:nth-child(2) .reveal .lbl::after{animation-delay:.4s}
.code:nth-child(3) .reveal .lbl::after{animation-delay:.8s}
.code:nth-child(4) .reveal .lbl::after{animation-delay:1.2s}
.code:nth-child(5) .reveal .lbl::after{animation-delay:1.6s}
.code:nth-child(6) .reveal .lbl::after{animation-delay:2s}
/* 할인액 금색 강조 */
.code.best{background:linear-gradient(180deg,#fffaf0,#fff)}
@media (prefers-reduced-motion:reduce){.btn-main::after,.reveal .lbl::after{animation:none;display:none}.btn,.reveal{transition:none}}
.btn:focus,.reveal:focus{outline:none}
.btn:focus-visible,.reveal:focus-visible{outline:2px solid #1b1b1f;outline-offset:3px}