:root{--bg:#f5f5fb;--bg2:#ecebfb;--card:#fff;--line:#e4e4ef;--text:#16162a;--text2:#5d5d78;--muted:#9a9ab0;--accent:#4f46e5;--accent2:#6d5dfc;--ok:#16a34a;--warn:#d97706;--bad:#dc2626;--red:#ef4444}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:linear-gradient(180deg,var(--bg2) 0,var(--bg) 420px);color:var(--text);font:16px/1.6 "Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;word-break:keep-all}
a{color:var(--accent)}
.wrap{max-width:760px;margin:0 auto;padding:12px 16px 40px}
.top{display:flex;align-items:center;justify-content:space-between;background:rgba(255,255,255,.75);border:1px solid var(--line);border-radius:18px;padding:10px 14px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--text);font-weight:800;font-size:17px}
.brand svg{width:28px;height:28px}
.top nav a{margin-left:14px;color:var(--text2);text-decoration:none;font-size:14px;font-weight:600}

/* 앱 배너 */
.apps{position:relative;margin-top:12px;border-radius:16px;overflow:hidden;aspect-ratio:3/1;max-height:180px;width:100%;box-shadow:0 6px 18px rgba(30,30,80,.12)}
.bn{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:6px;padding:0 4% 0 5%;background-size:cover;background-position:right center;color:#fff;text-decoration:none;opacity:0;transition:opacity .5s;pointer-events:none}
.bn.on{opacity:1;pointer-events:auto}
.bn b{font-size:clamp(14px,3.9vw,22px);line-height:1.3;font-weight:800;text-shadow:0 1px 6px rgba(0,0,0,.18);max-width:58%}
.bn-tag{font-size:clamp(10px,2.6vw,12px);font-weight:700;background:rgba(255,255,255,.22);border:1px solid rgba(255,255,255,.35);padding:1px 8px;border-radius:99px}
.bn-btn{font-size:clamp(11px,3vw,14px);font-weight:800;background:#fff;color:#1d2b7a;padding:4px 12px;border-radius:99px;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.bn[data-app=lh] .bn-btn{color:#0f5f58}
.dots{position:absolute;right:10px;bottom:8px;display:flex;gap:5px}
.dots i{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.5)}.dots i.on{background:#fff;width:16px;border-radius:4px}

.hero{text-align:center;padding:26px 4px 14px}
.hero h1{margin:0;font-size:clamp(30px,8vw,44px);line-height:1.15;font-weight:900;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--accent);background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{margin:12px 0 0;color:var(--text2);font-size:clamp(14px,3.9vw,17px)}
.hero p b{color:var(--text)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:0;border-radius:14px;padding:10px 16px;font:inherit;font-weight:700;font-size:15px;cursor:pointer;text-decoration:none;-webkit-tap-highlight-color:transparent;user-select:none}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 6px 16px rgba(79,70,229,.3)}
.btn.primary:active{transform:translateY(1px)}
.btn.big{padding:16px 22px;font-size:18px;border-radius:16px}
.btn.wide{width:100%}
.btn.ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
.btn[disabled]{opacity:.6;pointer-events:none}

.tool{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:16px;box-shadow:0 10px 30px rgba(40,40,100,.07)}
.drop{display:flex;flex-direction:column;align-items:center;gap:12px;padding:26px 12px;border:2px dashed #cfcdf3;border-radius:18px;cursor:pointer;text-align:center;transition:background .2s}
.drop.over{background:#f3f2ff;border-color:var(--accent)}
.drop svg{width:64px;height:64px}
.drop .btn{width:min(100%,360px)}
.drop small{color:var(--muted);font-size:13px}
.safe{text-align:center;margin:12px 0 2px;font-size:13.5px;color:var(--text2)}

.edit{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:18px;align-items:start}
.stage-wrap{position:sticky;top:8px}
.stage{position:relative;width:100%;aspect-ratio:413/531;border-radius:6px;overflow:hidden;background:repeating-conic-gradient(#f1f1f6 0 25%,#fff 0 50%) 0 0/16px 16px;box-shadow:0 0 0 1px var(--line);touch-action:none;cursor:grab}
.stage canvas{display:block;width:100%;height:100%}
.busy{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;background:rgba(255,255,255,.82);font-size:14px;color:var(--text2)}
.spin{width:30px;height:30px;border:3px solid #ddd;border-top-color:var(--accent);border-radius:50%;animation:sp 0.8s linear infinite}@keyframes sp{to{transform:rotate(360deg)}}
.legend{display:flex;gap:12px;justify-content:center;font-size:12px;color:var(--text2);margin-top:6px;flex-wrap:wrap}
.legend i{display:inline-block;width:14px;height:0;border-top:2px dashed var(--red);vertical-align:middle;margin-right:4px}.legend i.lg{height:8px;border:0;background:rgba(22,163,74,.25)}
.hint{margin:0 0 10px;font-size:14px;color:var(--text2)}
.ctrl{display:flex;align-items:center;gap:8px}
.ctrl input{flex:1;accent-color:var(--accent)}
.ib{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;font-size:18px;font-weight:700;cursor:pointer;color:var(--text);-webkit-tap-highlight-color:transparent;touch-action:manipulation}
.ib:active{background:#f0f0fa}
.pad{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0}
.pad .btn{height:42px;padding:0 12px;font-size:14px}
.checks{list-style:none;margin:6px 0 14px;padding:0;display:grid;gap:6px}
.checks li{display:flex;gap:8px;align-items:flex-start;font-size:14px;line-height:1.45;padding:8px 10px;border-radius:12px;background:#f7f7fb}
.checks li::before{flex:none;width:20px;height:20px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:900;color:#fff;margin-top:1px}
.checks li.ok::before{content:"✓";background:var(--ok)}.checks li.warn::before{content:"!";background:var(--warn)}.checks li.bad::before{content:"✕";background:var(--bad)}
.checks li.bad{background:#fef2f2}.checks li.warn{background:#fffbeb}
.checks small{color:var(--text2);display:block}
.checks li.note-li{background:none;padding:0 4px}.checks li.note-li::before{display:none}
.done{display:flex;gap:14px;align-items:center;margin-top:14px;padding:12px;border-radius:16px;background:#f0fdf4;border:1px solid #bbf7d0}
.done img{width:92px;height:auto;border:1px solid var(--line);background:#fff}
.done p{margin:2px 0 8px;font-size:13.5px;color:var(--text2)}
.done .btn{padding:8px 12px;font-size:14px;margin:0 6px 6px 0;white-space:nowrap}
#save small{display:block;font-size:13px;font-weight:600;opacity:.85}
#save{flex-direction:column;gap:0;line-height:1.3}
.next{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}
.nx{display:flex;flex-direction:column;padding:12px;border-radius:14px;border:1px solid var(--line);text-decoration:none;color:var(--text);background:#fff}
.nx b{font-size:14.5px}.nx span{font-size:12.5px;color:var(--text2)}
.nx::after{content:"↗";align-self:flex-end;color:var(--accent);font-weight:800;margin-top:-18px}

.steps{margin:28px 0 0}
.steps h2,.doc h2{font-size:21px;margin:30px 0 12px;letter-spacing:-.01em}
.steps ol{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:8px;counter-reset:s}
.steps li{background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px;display:flex;flex-direction:column;gap:2px;counter-increment:s;font-size:14px}
.steps li::before{content:counter(s);width:24px;height:24px;border-radius:50%;background:var(--accent);color:#fff;font-weight:800;font-size:13px;display:flex;align-items:center;justify-content:center;margin-bottom:4px}
.steps li span{color:var(--text2);font-size:13px}
.doc{font-size:15.5px}
.spec{width:100%;border-collapse:collapse;background:#fff;border-radius:16px;overflow:hidden;border:1px solid var(--line)}
.spec th,.spec td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.spec th{width:1%;white-space:nowrap;background:#fafaff;font-weight:700;color:var(--text2);font-size:14px}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:0}
.note{font-size:13px;color:var(--muted)}
.why{padding-left:20px}.why li{margin:6px 0}
.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:0 14px;margin:8px 0}
.faq summary{cursor:pointer;font-weight:700;padding:13px 0;list-style:none;position:relative;padding-right:24px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:11px;font-size:20px;color:var(--accent)}
.faq details[open] summary::after{content:"−"}
.faq p{margin:0 0 14px;color:var(--text2)}
.foot{margin-top:40px;font-size:12.5px;color:var(--muted);text-align:center}
.foot a{color:var(--text2)}

@media (max-width:640px){
  .edit{grid-template-columns:1fr}
  .stage-wrap{position:static;width:min(100%,300px);margin:0 auto}
  .steps ol{grid-template-columns:1fr 1fr}
  .next{grid-template-columns:1fr}
  .top nav a{margin-left:10px}
}

/* 안내 페이지 */
.top-cta{background:var(--accent);color:#fff;text-decoration:none;font-weight:800;font-size:14px;padding:7px 14px;border-radius:99px}
.art{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:18px 18px 26px;margin-top:14px;font-size:16px;line-height:1.75}
.art h1{font-size:clamp(26px,7vw,36px);line-height:1.2;margin:6px 0 10px;letter-spacing:-.02em}
.art h1 em{font-style:normal;color:var(--accent)}
.art h2{font-size:20px;margin:30px 0 10px;padding-top:4px;letter-spacing:-.01em}
.art .lead{font-size:17px;color:var(--text2);margin:0 0 6px}
.art .meta{font-size:12.5px;color:var(--muted);margin:0 0 14px}
.art ul,.art ol{padding-left:22px}.art li{margin:6px 0}
.crumb{font-size:13px;color:var(--muted)}.crumb a{color:var(--text2);text-decoration:none}
.spec.sum{margin:6px 0 16px}
.cta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:18px 0;padding:16px 18px;border-radius:18px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;text-decoration:none;box-shadow:0 8px 20px rgba(79,70,229,.28)}
.cta b{display:block;font-size:17px}.cta small{display:block;font-size:13px;opacity:.9}.cta i{font-style:normal;font-size:26px;font-weight:900}
.howto li::marker{color:var(--accent);font-weight:800}
.rel{list-style:none;padding:0!important;display:grid;grid-template-columns:1fr 1fr;gap:8px}
.rel a{display:flex;flex-direction:column;padding:12px 14px;border:1px solid var(--line);border-radius:14px;text-decoration:none;color:var(--text);background:#fafaff;height:100%}
.rel b{font-size:15px}.rel span{font-size:13px;color:var(--text2);line-height:1.5;margin-top:2px}
.gnav{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 14px;margin:0 0 14px}
.gnav a{color:var(--text2);text-decoration:none;font-weight:600;font-size:13.5px}
.guides{margin-top:30px}.guides .rel{margin:0}
@media (max-width:640px){.rel{grid-template-columns:1fr}}