@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Noto+Sans+KR:wght@400;500;600;700;800&display=swap');
:root{--ink:#343d49;--muted:#94959a;--paper:#f6f5f1;--border:#e5e5e1;--accent:#748ba0}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans','Noto Sans KR',sans-serif}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #7bb6d2;outline-offset:4px}button:disabled{opacity:.35;cursor:default}[hidden]{display:none!important}.app{max-width:1180px;margin:auto;padding:0 42px}header{height:94px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.brand{color:var(--ink);display:flex;align-items:center;gap:12px;text-decoration:none;font-size:25px;font-weight:700;letter-spacing:-.7px}.logo{width:30px;height:30px;background:#2d3b50;border-radius:9px;color:#8bdfca;font-size:25px;line-height:27px;text-align:center;box-shadow:0 3px 0 #202c3c}.brand-note{border-left:1px solid #d7dadc;margin-left:9px;padding-left:20px;font-size:10px;letter-spacing:0;color:#99a1aa;font-weight:400}.sound{background:transparent;border:1px solid #dedfe1;border-radius:25px;padding:10px 15px;font-size:19px;color:#8b969f}.sound span{font-size:11px;margin-left:7px}.intro{display:flex;align-items:center;justify-content:space-between;padding:37px 0 30px}.eyebrow{font-size:9px;color:#91a0ad;letter-spacing:1.7px;font-weight:700;margin:0 0 14px}.eyebrow i{display:inline-block;width:6px;height:6px;border-radius:50%;background:#91b6b8;margin-right:7px;vertical-align:1px}h1{font-size:36px;letter-spacing:-1.9px;line-height:1.4;margin:0;font-weight:700}h1>span{color:#91adaf}.intro p:not(.eyebrow){font-size:12px;color:#929ca5;margin:12px 0 0}.mobile-break{display:none}.intro-diagram{position:relative;width:150px;height:75px;margin-right:30px;color:#8eb8b1}.intro-diagram>span{position:absolute;left:0;bottom:6px;font-size:22px}.intro-diagram>i{position:absolute;left:13px;bottom:19px;width:81px;height:44px;border-right:2px solid #a0c6bd;border-bottom:2px solid #a0c6bd}.intro-diagram>b{position:absolute;left:77px;bottom:7px;font-size:36px;color:#a2adbc;font-weight:400}.intro-diagram>em{position:absolute;left:86px;top:-14px;font-style:normal;font-size:25px}.layout{display:grid;grid-template-columns:minmax(0,1fr) 296px;gap:25px;align-items:start}.play-card{background:#fff;border:1px solid var(--border);border-radius:24px;padding:24px 27px 15px;box-shadow:0 6px 25px #25384904}.board-header{display:flex;align-items:center;justify-content:space-between}.badge{background:#edf1f4;color:#7c91a2;border-radius:7px;padding:8px 12px;font-size:10px;letter-spacing:1px;font-weight:700;display:inline-block}.tier{color:#a4adb4;font-size:11px;margin-left:10px}.timer{color:#a4adb4;font-variant-numeric:tabular-nums;font-size:12px}.board-surround{max-width:498px;margin:18px auto 23px}.board-caption{display:flex;align-items:center;justify-content:center;gap:5px;margin:0 0 14px;color:#a3aeb8;font-size:10px}.board-caption span{font-size:17px;color:#98aaba}.board-frame{position:relative;background:#1d2739;border:1px solid #27354a;border-radius:19px;padding:13px;overflow:hidden;box-shadow:inset 0 1px 10px #0003,0 5px 10px #22314312}.board{position:relative;aspect-ratio:1;background:radial-gradient(ellipse at 40% 40%,#26364b,#1d283a 80%);border-radius:8px;--size:5}#optics{width:100%;height:100%;display:block;overflow:hidden}#mirrorLayer{position:absolute;inset:0}.mirror{position:absolute;background:transparent;border:0;padding:0;touch-action:manipulation;display:grid;place-items:center;border-radius:10px}.mirror-tile{position:absolute;inset:5px;background:linear-gradient(140deg,#334558,#243249);border:1px solid #4d6174;border-radius:9px;box-shadow:0 3px 0 #152437,0 0 8px #7489a714;transition:background .15s,border-color .15s}.mirror:hover .mirror-tile{background:#3b5066;border-color:#8199ac}.mirror-angle{position:absolute;left:13%;right:13%;top:calc(50% - 3px);height:6px;border:1px solid #dff3ff;background:linear-gradient(#fff,#a0c7de);border-radius:4px;box-shadow:0 0 6px #bcdce355;transform:rotate(var(--angle));transition:transform .2s ease;pointer-events:none}.hinge{position:absolute;left:calc(50% - 3px);top:calc(50% - 3px);width:6px;height:6px;background:#7d9cba;border:1px solid #d3e6f6;border-radius:50%;pointer-events:none}.mirror.fixed .mirror-tile{background:#30373f;border-color:#56616a;box-shadow:0 2px 0 #1b242e}.mirror.fixed .mirror-angle{background:#9eafb8;border-color:#c1cdd4;box-shadow:none}.lock{position:absolute;right:1px;bottom:1px;border-radius:3px;background:#506074;color:#e1e6ee;font-size:8px;padding:0 3px;pointer-events:none}.mirror.energized .mirror-tile{border-color:var(--light);box-shadow:0 0 8px color-mix(in srgb,var(--light) 25%,transparent),0 3px 0 #152437}.mirror.hinted .mirror-tile{outline:3px solid #f3d286;outline-offset:2px;animation:hintPulse 1.1s infinite}.mirror.hinted:after{content:'↻';position:absolute;right:-1px;top:-4px;width:19px;height:19px;background:#f3d286;color:#745a2d;font-size:14px;line-height:18px;border-radius:6px;text-align:center;z-index:3}.endpoint-letter{font-family:'DM Sans',sans-serif;font-weight:700;text-anchor:middle;dominant-baseline:central}.play-stats{display:flex;justify-content:center;align-items:center;gap:35px;margin-bottom:21px}.play-stats>div:not(.color-chips){display:flex;align-items:baseline;gap:7px}.play-stats strong{font-size:19px;font-weight:600;color:#64798b;font-variant-numeric:tabular-nums}.play-stats span{font-size:10px;color:#a4b0ba}.color-chips{display:flex;gap:7px}.color-chip{width:20px;height:20px;border-radius:50%;border:1px solid var(--color);background:#f6f8fa;color:var(--color);font-size:10px;display:grid;place-items:center;opacity:.55;font-weight:700}.color-chip.lit{opacity:1;background:var(--color);color:#253545;box-shadow:0 0 0 3px #f1f5f7}.tools{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;border-top:1px solid #edf0f2;padding-top:16px}.tools button{background:#f4f6f7;border:1px solid #eef1f3;border-radius:10px;padding:11px 2px;color:#8495a5;font-size:12px}.tools button:hover{background:#eaf0f4}.tools button span{font-size:18px;vertical-align:-1px;margin-right:6px}.status{text-align:center;color:#9aaab6;font-size:10px;line-height:1.7;min-height:17px;margin:13px 0 0}.status.error{color:#b98575}aside{display:grid;gap:18px}.guide-card{background:#e7eef0;border:1px solid #dce6ea;border-radius:22px;padding:26px 25px 22px}.guide-icon{width:37px;height:37px;line-height:35px;text-align:center;font-size:29px;color:#849fab;background:#d7e5e9;border-radius:11px;margin-bottom:23px}.guide-card .eyebrow{font-size:7px;color:#94a8b1;letter-spacing:1.2px}.guide-card h2{font-size:22px;line-height:1.5;color:#5e7785;letter-spacing:-.8px;font-weight:600;margin:0 0 25px}.guide-card ol{list-style:none;counter-reset:guide;margin:0;padding:0}.guide-card li{position:relative;padding-left:29px;counter-increment:guide;margin-bottom:18px}.guide-card li:before{content:counter(guide);position:absolute;left:0;top:1px;width:19px;height:19px;border:1px solid #b7cbd3;color:#91acb7;border-radius:50%;font-size:10px;text-align:center;line-height:18px}.guide-card b{font-size:11px;color:#698392;font-weight:600;display:block}.guide-card li span{display:block;color:#93aab6;font-size:9px;margin-top:5px;line-height:1.6}.advanced-note{border-top:1px solid #cfdee4;padding-top:13px;font-size:9px;color:#839daa;line-height:1.8}.legend{display:flex;gap:13px;margin-top:13px;font-size:9px;color:#95a9b5}.legend i{font-style:normal;margin-right:3px}.legend-source{color:#6bb7a8}.legend-target{color:#8d9db4}.legend-wall{color:#697b90}.stages-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:22px}.section-heading{display:flex;justify-content:space-between;align-items:center}.section-heading h2{font-size:12px;font-weight:600;margin:0;color:#728697}.section-heading span{font-size:10px;color:#a7b1ba}.progress-track{height:3px;background:#edf1f3;margin:15px 0 18px;border-radius:10px;overflow:hidden}.progress-track>div{height:100%;background:#9db6c1;transition:width .3s}.stages{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.stage{border:1px solid #edf0f2;background:#f9fafb;aspect-ratio:1.07;border-radius:8px;font-size:11px;color:#a7b1ba;position:relative}.stage.active{background:#829eae;border-color:#829eae;color:white;box-shadow:0 3px 7px #839fb422}.stage.cleared:not(.active){background:#edf5f1;border-color:#dfece4;color:#84a691}.stage.cleared:after{content:'·';position:absolute;bottom:-3px;left:0;right:0;font-size:17px}.pager{display:flex;justify-content:space-between;align-items:center;margin-top:15px}.pager button{border:1px solid #edf0f2;background:#f8fafb;color:#9eb0bd;border-radius:8px;width:27px;height:26px;font-size:20px}.pager span{font-size:9px;color:#a4b2bd}.stages-card>p{font-size:8px;color:#a8b8c2;margin:16px 0 0;text-align:center}.level-note{display:flex;align-items:center;gap:14px;padding:0 17px;color:#a7b7c0}.level-note>span{font-size:29px;opacity:.7}.level-note p{font-size:10px;line-height:1.8;margin:0}.win{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#202e43ed;z-index:6;color:#e6eef5;animation:appear .25s}.win-mark{font-size:42px;color:#87dac5;margin-bottom:20px;text-shadow:0 0 16px #87dac555}.win .eyebrow{color:#8cbdb8;font-size:8px;margin-bottom:11px}.win h2{font-size:27px;letter-spacing:-1px;margin:0;font-weight:600}.stars{font-size:27px;letter-spacing:7px;color:#f1d18b;margin:13px 0 0}.stars .empty{color:#516071}.win>p:not(.eyebrow){font-size:11px;color:#a1b5c8;margin:14px 0 24px}.primary{border:1px solid #87cbbd;background:#78b9ab;color:#143d3e;border-radius:30px;padding:13px 22px;font-size:12px;font-weight:600}.primary span{margin-left:22px}footer{display:flex;justify-content:space-between;padding:25px 0;color:#a8b2ba;font-size:8px;letter-spacing:.8px}footer nav{display:flex;gap:16px}footer a{color:#9bafb9;text-decoration:none;letter-spacing:0;font-size:9px}@keyframes hintPulse{50%{filter:brightness(1.3)}}@keyframes appear{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:scale(1)}}@media(max-width:900px){.app{padding:0 24px}.layout{grid-template-columns:minmax(0,1fr) 244px;gap:18px}.play-card{padding:21px 19px 13px}.guide-card{padding:23px 19px}.guide-card h2{font-size:19px}.brand-note{display:none}h1{font-size:31px}.intro-diagram{margin-right:3px;width:115px;transform:scale(.8);transform-origin:right center}.play-stats{gap:20px}.board-frame{padding:10px}.stages-card{padding:19px}.mirror-angle{height:5px;top:calc(50% - 2.5px)}}@media(max-width:650px){.app{padding:0 16px}header{height:74px}.brand{font-size:22px}.logo{width:27px;height:27px;font-size:23px;line-height:25px}.sound{font-size:17px;padding:7px 11px}.intro{padding:27px 2px 23px}.eyebrow{font-size:7px;letter-spacing:1.4px;margin-bottom:11px}h1{font-size:28px;letter-spacing:-1.4px}.intro p:not(.eyebrow){font-size:10px}.intro-diagram{display:none}.layout{grid-template-columns:1fr;gap:17px}.play-card{padding:18px 15px 13px;border-radius:22px}.board-surround{margin:16px auto 19px}.board-caption{font-size:9px;margin-bottom:12px}.board-frame{padding:8px;border-radius:15px}.mirror-tile{inset:3px;border-radius:6px}.mirror-angle{height:4px;top:calc(50% - 2px);left:10%;right:10%}.hinge{width:4px;height:4px;left:calc(50% - 2px);top:calc(50% - 2px)}.lock{font-size:6px;right:0;bottom:0;padding:0 2px}.play-stats{gap:23px;margin-bottom:19px}.play-stats strong{font-size:17px}.play-stats span{font-size:9px}.color-chips{gap:5px}.color-chip{width:17px;height:17px;font-size:9px}.tools button{font-size:11px;padding:9px 1px}.tools button span{font-size:16px;margin-right:5px}.status{font-size:9px;margin-top:12px}.guide-card{padding:17px 19px;border-radius:17px}.guide-card .guide-icon,.guide-card .eyebrow,.guide-card h2,.guide-card ol{display:none}.advanced-note{border:0;padding:0;font-size:10px;line-height:1.8}.legend{margin-top:9px}.stages-card{padding:18px}.stages{gap:7px}.stage{aspect-ratio:1.5}.level-note{display:none}.win-mark{font-size:32px;margin-bottom:11px}.win h2{font-size:23px}.stars{font-size:22px}.win>p:not(.eyebrow){font-size:10px;margin:11px 0 18px}footer{font-size:7px;padding:20px 0;gap:14px;flex-wrap:wrap}footer nav{gap:13px}footer a{font-size:8px}.mirror.hinted:after{width:15px;height:15px;font-size:12px;line-height:14px;top:-2px;right:0}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}
.mirror.fixed:disabled{opacity:1}.mirror:disabled:not(.fixed){opacity:1}