@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700;900&display=swap');
:root{--cream:#F4F5F7;--paper:#FFFFFF;--teal:#2F4A4B;--ink:#1F2430;--sage:#1F2430;--persimmon:#E2632F;--coral:#D98583;--sand:#E6E8EC;--muted:#8A90A0;--line:#D5D9E0;--line-strong:#8A90A0}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
body{margin:0;background:var(--cream);color:var(--ink);font-family:"Noto Sans KR","Pretendard","Apple SD Gothic Neo","Malgun Gothic",sans-serif;line-height:1.65}
a{color:inherit}
h1,h2,h3{font-family:"Noto Sans KR",sans-serif;font-weight:900;letter-spacing:-.5px;color:var(--ink);line-height:1.3;margin:0}
.nav{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--sand)}
.nav .in{max-width:860px;margin:0 auto;padding:0 18px;display:flex;align-items:center;height:60px;gap:16px}
.logo{display:flex;align-items:center;gap:8px;font-weight:900;font-size:18px;color:var(--ink);text-decoration:none}
.logo svg{width:24px;height:24px}
.nav .links{margin-left:auto;display:flex;gap:14px;font-size:14px}
.nav .links a{text-decoration:none}
.nav .go{background:var(--persimmon);color:#fff;border-radius:999px;padding:7px 14px;font-weight:700}
main{max-width:860px;margin:0 auto;padding:22px 18px 60px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:10px}
.crumb a{text-decoration:none}
.card{background:var(--paper);border:1.5px solid var(--sand);border-radius:22px;padding:22px;margin-bottom:18px}
.head h1{font-size:clamp(24px,4.6vw,34px);margin-bottom:8px}
.meta{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.meta span{background:#fff;border:1px solid var(--sand);border-radius:999px;padding:2px 10px;font-size:13px}
.lead{margin:0;color:#4c5f5e}
.story{margin:14px 0 0;padding:12px 16px;background:#F4F5F7;border-left:4px solid var(--persimmon);border-radius:8px;font-style:italic;color:#4c5f5e}
.playwrap{display:flex;justify-content:center;overflow-x:auto;margin:16px 0 8px;touch-action:none;user-select:none}
table.board{border-collapse:collapse}
table.board td{padding:0;text-align:center}
td.cell{width:var(--cs);height:var(--cs);border:1px solid var(--line);background:#fff;cursor:pointer;position:relative}
td.cell.r5{border-right:2px solid var(--line-strong)} td.cell.b5{border-bottom:2px solid var(--line-strong)}
td.cell.c0{border-left:2px solid var(--line-strong)} td.cell.t0{border-top:2px solid var(--line-strong)}
td.cell.rl{border-right:2px solid var(--line-strong)} td.cell.bl{border-bottom:2px solid var(--line-strong)}
td.cell.f{background:var(--teal)}
td.cell.x::after{content:"";position:absolute;inset:24%;background:linear-gradient(45deg,transparent 44%,var(--coral) 44%,var(--coral) 56%,transparent 56%),linear-gradient(-45deg,transparent 44%,var(--coral) 44%,var(--coral) 56%,transparent 56%)}
td.cell.ax::after{opacity:.45}
td.colclue{vertical-align:bottom;font-size:calc(var(--cs) * .46);line-height:1.15;padding-bottom:4px;font-weight:700}
td.rowclue{text-align:right;padding-right:6px;font-size:calc(var(--cs) * .46);font-weight:700;white-space:nowrap}
td.rowclue span{display:inline-block;margin-left:calc(var(--cs) * .22)}
.done{color:#b8b0a0}
.tools{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin-top:10px}
.btn{border-radius:12px;padding:9px 15px;font-size:15px;font-weight:700;cursor:pointer;background:#fff;color:var(--teal);border:1.5px solid var(--sand);font-family:inherit;text-decoration:none;display:inline-block}
.btn.on{background:var(--sage);color:#fff;border-color:var(--sage)}
.btn.primary{background:var(--teal);color:#fff;border-color:var(--teal)}
.btn.orange{background:var(--persimmon);color:#fff;border-color:var(--persimmon)}
.small{font-size:13px;color:var(--muted);text-align:center;margin:8px 0 0}
.win{display:none;text-align:center;margin-top:14px;font-weight:700;color:var(--persimmon);font-size:18px}
.win.show{display:block}
h2.sec{font-size:22px;margin:0 0 10px}
.steps{display:grid;gap:14px}
.step{display:grid;grid-template-columns:150px 1fr;gap:16px;align-items:start;background:#fff;border:1px solid var(--sand);border-radius:14px;padding:14px}
.step h3{font-size:17px;margin-bottom:4px}
.step ul{margin:6px 0 0;padding-left:18px;font-size:14.5px}
.step li{margin-bottom:3px}
.mini svg{width:100%;height:auto;display:block}
.step .mini{width:150px;border-radius:6px;overflow:hidden}
.legend{font-size:13px;color:var(--muted);margin:0 0 10px}
details.ans{background:#fff;border:1px solid var(--sand);border-radius:14px;padding:14px 16px}
details.ans summary{cursor:pointer;font-weight:700;color:var(--teal)}
details.ans .pic{width:170px;margin:14px auto 6px;background:#fff8ec;border-radius:12px;padding:12px}
details.ans p{text-align:center;margin:6px 0 0}
.tips ol{margin:6px 0 0;padding-left:20px}
.rel{display:grid;grid-template-columns:repeat(auto-fill,minmax(110px,1fr));gap:10px}
.rel a{display:block;background:#fff;border:1px solid var(--sand);border-radius:12px;padding:10px;text-align:center;text-decoration:none;font-size:13px}
.rel a .mini{width:56px;margin:0 auto 6px;background:#fff8ec;border-radius:8px;padding:4px}
.pn{display:flex;justify-content:space-between;gap:10px;margin-top:14px;font-size:14px}
.pn a{text-decoration:none;color:var(--teal);font-weight:700}
.cta{text-align:center}
.cta p{margin:0 0 12px}
.season h2{margin:22px 0 10px}
footer{border-top:1px solid var(--sand);padding:22px 18px;font-size:13px;color:var(--muted);text-align:center}
@media (max-width:560px){.step{grid-template-columns:96px 1fr}.step .mini{width:96px}.nav .links a:not(.go){display:none}}
.rel a.solved{border-color:var(--sage);position:relative}
.rel a.solved::after{content:"✓";position:absolute;top:6px;right:8px;color:var(--sage);font-weight:800}
.desc{margin:12px 0 0;padding:10px 14px;background:#fff;border-radius:10px;color:#4c5f5e}

.card{border-radius:18px}
.desc,.step,details.ans,.rel a{background:#fff}
.desc{background:#F4F5F7}
.meta span{background:#F4F5F7;border-color:#E6E8EC}