:root{--navy:#08234e;--navy-2:#0b3268;--blue:#1767d4;--blue-soft:#eaf3ff;--gold:#ffc62f;--orange:#ff6d33;--green:#43ad4e;--red:#ef493f;--cream:#e3ecf4;--paper:#f2f6fa;--ink-muted:#5c6979;--line:#d5e0e9;--neu-surface:#e3ecf4;--neu-surface-raised:#fbfdff;--neu-highlight:#ffffffc2;--neu-shadow:#3d4f663d;--neu-shadow-sm:-4px -4px 9px var(--neu-highlight), 5px 5px 11px var(--neu-shadow);--neu-shadow-md:-7px -7px 16px var(--neu-highlight), 8px 8px 18px var(--neu-shadow);--neu-shadow-lg:-10px -10px 24px #fffffff0, 12px 12px 28px #4a5b6d33;--neu-inset:inset 4px 4px 9px #4a5b6d29, inset -4px -4px 9px #fffffff0;--neu-inset-soft:inset 2px 2px 5px #4a5b6d21, inset -2px -2px 5px #ffffffe0;--shadow:var(--neu-shadow-lg);--soft-shadow:var(--neu-shadow-sm)}*{box-sizing:border-box}html{min-width:320px;color:var(--navy);-webkit-text-size-adjust:100%;text-rendering:optimizelegibility;background:#dfe7ef}body{-webkit-tap-highlight-color:transparent;background:radial-gradient(circle at 10% 10%,#ffffff9e,#0000 31%),radial-gradient(circle at 88% 70%,#4d91d21a,#0000 32%),#dfe7ef;min-height:100dvh;margin:0;font-family:Pretendard,Apple SD Gothic Neo,Noto Sans KR,system-ui,sans-serif}button{font:inherit}button:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.app-frame{width:100%;max-width:100%;min-height:100dvh;position:relative;overflow:hidden}.ambient-line{opacity:.14;background:#2f77d7;border-radius:999px;width:48vw;height:8px;display:none;position:fixed;transform:rotate(-18deg)}.ambient-line:before,.ambient-line:after{content:"";background:#dfe7ef;border:6px solid;border-radius:50%;width:22px;height:22px;position:absolute;top:50%;transform:translateY(-50%)}.ambient-line:before{left:24%}.ambient-line:after{right:20%}.ambient-line--one{color:#2f77d7;top:22vh;left:-12vw}.ambient-line--two{color:#56a95c;background:#56a95c;bottom:18vh;right:-13vw;transform:rotate(22deg)}.app-shell{background:var(--cream);width:100%;max-width:100%;min-height:100dvh;margin:0 auto;position:relative;overflow:hidden}.screen{width:100%;min-width:0;max-width:100%;min-height:100dvh;position:relative}.ui-icon{flex:none;width:1em;height:1em;display:block;overflow:visible}.icon-button,.back-button{width:43px;height:43px;color:var(--navy);box-shadow:var(--soft-shadow);cursor:pointer;background:#fffefbeb;border:1px solid #846f5333;border-radius:50%;place-items:center;padding:0;display:grid}.back-button{border-radius:13px}.back-chevron-icon{border:0 solid;border-width:0 0 4px 4px;width:12px;height:12px;display:block;transform:translate(2px)rotate(45deg)}.top-actions{gap:10px;display:flex}.top-action-icon{width:27px;height:27px}.train-mark{border:4px solid var(--navy);background:var(--navy);color:#fff;border-radius:13px 13px 10px 10px;flex:none;justify-content:center;align-items:flex-end;width:45px;height:54px;display:inline-flex;position:relative;box-shadow:inset 0 -7px #061a3a}.train-mark:before{background:var(--gold);content:"";border-radius:99px;width:19px;height:6px;position:absolute;top:-7px;left:50%;transform:translate(-50%)}.train-mark:after{background:var(--navy);content:"";border-radius:99px;width:38px;height:4px;position:absolute;bottom:-8px;left:50%;transform:translate(-50%)}.train-mark__window{background:#fffdf6;border-radius:4px;width:29px;height:17px;position:absolute;top:7px;left:50%;transform:translate(-50%)}.train-mark__lights{justify-content:space-between;align-items:center;width:30px;display:flex;position:absolute;bottom:8px;left:50%;transform:translate(-50%)}.train-mark__lights i{background:#fffdf6;border-radius:50%;width:6px;height:6px;display:block}.train-mark--small{border-width:3px;border-radius:8px;width:27px;height:32px}.train-mark--small:before{width:11px;height:4px;top:-5px}.train-mark--small:after{width:24px;height:3px;bottom:-5px}.train-mark--small .train-mark__window{width:17px;height:10px;top:4px}.train-mark--small .train-mark__lights{width:18px;bottom:5px}.train-mark--small .train-mark__lights i{width:4px;height:4px}.home-screen{height:100vh;height:100dvh;min-height:0;padding:max(18px, env(safe-area-inset-top)) 30px max(20px, env(safe-area-inset-bottom));background:radial-gradient(circle at 6% 16%, #ffc62f1c, transparent 30%), radial-gradient(circle at 94% 78%, #1767d414, transparent 30%), linear-gradient(#fffcf7f0, #fffaf3fc), var(--cream);overscroll-behavior-y:contain;flex-direction:column;display:flex;overflow-y:auto}.home-topbar,.game-topbar,.result-topbar{justify-content:space-between;align-items:center;gap:12px;display:flex}.home-topbar{align-items:flex-start;min-height:74px;margin-bottom:18px}.challenge-pill{min-height:43px;box-shadow:var(--soft-shadow);background:#fffefbeb;border:1px solid #846f5333;border-radius:24px;align-items:center;gap:8px;padding:0 16px;font-weight:850;display:inline-flex}.challenge-pill__icon,.result-attempt-icon{width:20px;height:20px;color:var(--orange);stroke-width:2.35px}.brand-block{text-align:center;flex-shrink:0;margin-bottom:28px;padding:0}.brand-emblem{border:4px solid var(--navy);background:#ffffffb8;border-radius:50%;place-items:center;width:74px;height:74px;margin:0 auto 7px;display:grid;box-shadow:0 10px 30px #08234e14}.brand-block h1{letter-spacing:.03em;margin:0;font-size:clamp(2rem,8vw,2.4rem);font-weight:950;line-height:1.08}.challenge-card{box-shadow:var(--shadow);background:#fffefbf0;border:1px solid #91754e3b;border-radius:20px;overflow:hidden}.challenge-card__header{background:linear-gradient(110deg, var(--navy), #0a3c75);color:#fff;justify-content:center;align-items:center;gap:10px;min-height:47px;padding:0 18px;display:flex}.challenge-title-icon{color:#fffffff0;stroke-width:2.4px;width:19px;height:19px}.challenge-card__header h2{letter-spacing:-.03em;margin:0;font-size:1rem}.route-summary{grid-template-columns:minmax(76px,1fr) 1.3fr minmax(76px,1fr);align-items:center;padding:13px 16px;display:grid}.route-station{border:5px solid var(--green);background:var(--paper);text-align:center;border-radius:50%;place-items:center;width:74px;max-width:100%;height:74px;margin:auto;padding:8px;display:grid;position:relative;box-shadow:0 8px 14px #261f141f}.route-station span{word-break:keep-all;max-width:64px;font-size:.74rem;font-weight:900;line-height:1.14}.route-station>span{text-align:center;width:max-content;min-width:0;max-width:none;transform:translate(-50%, -50%) scale(var(--route-station-name-scale,1));display:block;position:absolute;top:50%;left:50%}.station-name-line{display:inline}.route-station--start span{font-size:.7rem}.route-station--target{border-color:var(--gold)}.route-dots{grid-template-columns:repeat(6,minmax(0,1fr));align-items:center;min-width:0;display:grid}.route-dots i{background:var(--navy);border-radius:50%;place-self:center;width:7px;height:7px}.route-dots b{place-self:center;place-items:center;width:18px;height:18px;margin:0;display:grid}.route-chevron-icon{border:solid var(--navy);border-width:3px 3px 0 0;width:11px;height:11px;display:block;transform:translate(-2px)rotate(45deg)}.home-screen .route-dots i{background:var(--blue);transform-origin:50%;animation:.96s ease-in-out infinite both route-dot-flow}.home-screen .route-dots i:nth-child(2){animation-delay:.16s}.home-screen .route-dots i:nth-child(3){animation-delay:.32s}.home-screen .route-dots i:nth-child(4){animation-delay:.48s}.home-screen .route-dots i:nth-child(5){animation-delay:.64s}.home-screen .route-chevron-icon{border-color:var(--blue);will-change:transform, filter, opacity;animation:.96s ease-in-out .8s infinite both route-chevron-nudge}.challenge-metrics{border-top:1px solid var(--line);grid-template-columns:1fr 1fr;min-height:52px;display:grid}.challenge-metrics>div{justify-content:center;align-items:center;gap:8px;font-size:.84rem;font-weight:850;display:flex}.challenge-metrics>div+div{border-left:1px solid var(--line)}.challenge-metrics strong{margin-left:3px;font-size:1.05rem}.challenge-metrics div:last-child strong{color:var(--blue);font-size:1.2rem}.metric-target-icon{border:2px solid var(--navy);width:22px;height:22px;box-shadow:inset 0 0 0 3px var(--paper), inset 0 0 0 5px var(--blue);border-radius:50%;display:block}.attempt-dots{justify-content:center;gap:13px;padding:13px 20px 18px;display:flex}.attempt-dot{background:0 0;border:3px solid #c9c1b9;border-radius:50%;width:25px;height:25px;display:block}.attempt-dot--used{border-color:var(--blue);background:var(--blue)}.brand-block--compact{text-align:left;align-items:center;gap:16px;margin:0;padding:0;display:flex}.brand-block--compact .brand-emblem{border-width:4px;flex:none;width:74px;height:74px;margin:0}.brand-block--compact h1{font-size:2.15rem;line-height:1}.challenge-source-switch{--source-switch-gap:5px;--source-switch-padding:5px;min-height:52px;padding:var(--source-switch-padding);gap:var(--source-switch-gap);background:#e7ebefb8;border:1px solid #08234e17;border-radius:18px;grid-template-columns:repeat(2,minmax(0,1fr));margin:0 0 18px;display:grid;position:relative;box-shadow:inset 4px 4px 9px #08234e1a,inset -4px -4px 9px #ffffffd1}.challenge-source-switch:before{z-index:0;top:var(--source-switch-padding);bottom:var(--source-switch-padding);left:var(--source-switch-padding);width:calc((100% - var(--source-switch-padding) * 2 - var(--source-switch-gap)) / 2);content:"";pointer-events:none;will-change:transform;background:linear-gradient(145deg,#0b4c98,#062b61);border-radius:14px;transition:transform .3s cubic-bezier(.22,1,.36,1);position:absolute;transform:translate(0);box-shadow:inset 2px 2px 3px #fff3,inset -3px -3px 7px #0003,3px 3px 7px #08234e33}.challenge-source-switch[data-source=endless]:before{transform:translateX(calc(100% + var(--source-switch-gap)))}.challenge-source-option{z-index:1;min-width:0;color:var(--navy);cursor:pointer;font:inherit;letter-spacing:-.035em;background:0 0;border:0;border-radius:14px;justify-content:center;align-items:center;gap:6px;font-size:.86rem;font-weight:900;transition:color .18s;display:flex;position:relative}.challenge-source-option--selected{color:#fff}.challenge-source-option__icon{stroke-width:2.4px;width:1.15em;height:1.15em}.home-screen>.challenge-card{flex-shrink:0;margin-bottom:28px}.home-screen .challenge-card__header{min-height:47px}.challenge-card__header{position:relative}.challenge-infinity-icon,.challenge-pill__infinity,.result-infinity-icon,.button-infinity-icon{color:currentColor;font-size:1.35rem;font-weight:950;line-height:1}.challenge-infinity-icon{stroke-width:2.4px}.challenge-complete-badge{white-space:nowrap;border-radius:99px;padding:4px 7px;font-size:.58rem;font-weight:950;position:absolute;right:12px}.challenge-complete-badge--success{color:#227b39;background:#e6f7ea;box-shadow:inset 0 0 0 1px #227b3933}.challenge-complete-badge--failure{color:#b74439;background:#fff0ed;box-shadow:inset 0 0 0 1px #b7443933}.challenge-card--empty{flex-direction:column;height:241px;min-height:241px;display:flex}.challenge-card--empty>.challenge-card__header{flex:none}.challenge-card--empty>.endless-empty-state{flex:auto;min-height:0}.endless-empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:182px;padding:24px 22px;display:flex}.endless-empty-state__icon{width:58px;height:58px;color:var(--blue);background:#e8f1fb;border-radius:50%;place-items:center;margin-bottom:12px;font-size:1.9rem;font-weight:950;display:grid;box-shadow:inset 3px 3px 7px #08234e1a,inset -3px -3px 7px #ffffffe6}.endless-empty-state__icon--locked{color:#6f7479;background:#ebe9e6;font-size:1.35rem}.endless-empty-state strong{letter-spacing:-.035em;font-size:1.05rem}.endless-empty-state p{max-width:290px;color:var(--ink-muted);word-break:keep-all;margin:7px 0 0;font-size:.72rem;font-weight:750;line-height:1.45}.home-screen .route-summary{padding:13px 16px}.home-screen .route-station{border-width:5px;width:74px;height:74px}.home-screen .route-station span{font-size:.74rem}.challenge-card>.attempt-dots{border-top:1px solid #e7ddd1b8;gap:10px;padding:10px 16px 12px}.challenge-card>.attempt-dots .attempt-dot{border-width:2px;width:17px;height:17px}.mode-select{flex:1 0 auto;gap:12px;margin:0 0 18px;display:grid}.mode-select__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;height:100%;display:grid}.mode-option{width:100%;min-width:0;min-height:164px;max-height:250px;color:var(--navy);box-shadow:var(--soft-shadow);cursor:pointer;text-align:center;background:#fff;border:2px solid #08234e24;border-radius:19px;flex-direction:column;justify-content:center;align-items:center;padding:16px 9px 14px;transition:border-color .16s,box-shadow .16s,transform .16s;display:flex;position:relative}.mode-option:hover{transform:translateY(-2px)}.mode-option--selected{border-color:var(--blue);box-shadow:0 10px 23px #1767d42b,inset 0 0 0 1px #1767d414}.mode-option--exact.mode-option--selected{border-color:var(--gold);box-shadow:0 10px 23px #dc9d0029,inset 0 0 0 1px #ffc62f21}.mode-option--locked{color:#606a76;filter:saturate(.45);border-color:#6f74792e}.mode-option--locked .mode-artwork{opacity:.48;filter:grayscale(.75)}.mode-option--locked .mode-option__check{opacity:1;background:#7d8389;font-size:.72rem;transform:scale(1);box-shadow:0 4px 10px #464b5033}.mode-option--locked.mode-option--selected{border-color:#858b91;box-shadow:inset 3px 3px 8px #08234e1a,inset -3px -3px 8px #ffffffd1}.mode-option__check{background:var(--blue);color:#fff;opacity:0;border-radius:50%;place-items:center;width:27px;height:27px;transition:opacity .15s,transform .15s;display:grid;position:absolute;top:9px;right:9px;transform:scale(.72);box-shadow:0 4px 10px #1767d43d}.mode-option__check .ui-icon{stroke-width:3px;width:17px;height:17px}.mode-option--exact .mode-option__check{background:#e4a400;box-shadow:0 4px 10px #c68b003d}.mode-option--selected .mode-option__check{opacity:1;transform:scale(1)}.mode-option>strong{letter-spacing:-.045em;margin:7px 0 4px;font-size:1.2rem;font-weight:950}.mode-option>span:last-child{color:var(--ink-muted);word-break:keep-all;font-size:.7rem;font-weight:800;line-height:1.25}.mode-artwork{flex:none;width:92px;height:57px;display:block;position:relative}.route-art__line{background:var(--blue);transform-origin:0;border-radius:99px;height:5px;display:block;position:absolute}.route-art__line--flat{width:40px;top:38px;left:15px}.route-art__line--rise{width:35px;top:38px;left:52px;transform:rotate(-39deg)}.route-art__station{z-index:2;border:4px solid var(--blue);background:var(--paper);border-radius:50%;width:19px;height:19px;display:block;position:absolute}.route-art__station--start{top:31px;left:8px}.route-art__station--turn{top:31px;left:45px}.route-art__arrow{border:solid var(--blue);border-width:5px 5px 0 0;width:16px;height:16px;display:block;position:absolute;top:9px;right:2px;transform:rotate(5deg)}.target-art__ring{z-index:1;border:4px solid var(--gold);background:#fffefbe0;border-radius:50%;width:54px;height:54px;display:block;position:absolute;top:2px;left:20px}.target-art__axis{z-index:0;background:var(--gold);border-radius:99px;display:block;position:absolute}.target-art__axis--horizontal{width:78px;height:4px;top:28px;left:8px}.target-art__axis--vertical{width:4px;height:58px;top:0;left:45px}.mode-artwork--exact .train-mark--small{z-index:2;position:absolute;top:13px;left:33px;transform:scale(.82)}.attempt-dots--compact{gap:3px;padding:0 0 3px}.attempt-dots--compact .attempt-dot{border-width:1px;width:8px;height:8px}.home-cta{text-align:center;flex-shrink:0;margin-top:auto;padding:16px 0 2px}.home-cta>p{margin:0 0 11px;font-size:.84rem;font-weight:850}.ticket-button{width:100%;min-height:64px;color:var(--navy);cursor:pointer;letter-spacing:-.04em;background:linear-gradient(105deg,#ffba18 0%,#ffd65a 100%);border:2px solid #dc9d00;border-radius:19px;justify-content:center;align-items:center;gap:17px;margin:0 auto;padding:0 18% 0 11%;font-size:1.33rem;font-weight:950;display:flex;position:relative;overflow:hidden;box-shadow:0 12px 22px #c68b0040,inset 0 0 0 2px #ffffff6b}.ticket-button:after{content:"";border-left:3px dotted #774c004d;height:72%;position:absolute;top:14%;right:13.5%}.ticket-button:disabled{filter:grayscale(.65);cursor:default}.ticket-button .train-mark--small{transform:scale(.82)}.button-infinity-icon{text-align:center;width:25px}.nav-icon{font-size:1.65rem;font-weight:900;line-height:1}.game-screen{--previous-attempts-collapsed-height:calc(154px + env(safe-area-inset-bottom));height:100dvh;min-height:0;padding-top:max(12px, env(safe-area-inset-top));background:var(--cream);contain:inline-size;grid-template-rows:auto auto auto minmax(150px,1fr) auto;display:grid;position:relative;overflow:hidden}.game-topbar{width:100%;min-width:0;max-width:100%;padding:0 14px 10px}.game-topbar__actions{flex:none;align-items:center;gap:6px;display:flex}.challenge-pill{white-space:nowrap;flex:auto;gap:6px;min-width:0;padding:0 10px;font-size:.8rem}.challenge-pill__label{min-width:0;color:var(--navy);font-size:inherit;text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.challenge-pill b{border:1px solid var(--line);border-radius:99px;flex:none;padding:4px 7px;font-size:.66rem}.undo-button,.give-up-button{color:#b63d32;cursor:pointer;background:#fff4f1;border:1px solid #ef493f40;border-radius:99px;flex:none;min-width:55px;min-height:39px;padding:0 13px;font-size:.82rem;font-weight:900}.undo-button{color:#1767d4;background:#f2f7ff;border-color:#1767d438;min-width:70px}.undo-button:disabled,.give-up-button:disabled{cursor:default;opacity:.45}.game-metrics{width:calc(100% - 28px);min-width:0;max-width:calc(100% - 28px);min-height:34px;box-shadow:var(--soft-shadow);background:#fffefbf2;border:1px solid #91754e3b;border-radius:17px;grid-template-columns:repeat(4,minmax(0,1fr));margin:0 14px 6px;display:grid}.game-metrics>div{justify-content:center;align-items:center;gap:4px;font-size:.7rem;font-weight:850;display:flex}.game-metrics>div+div{border-left:1px solid var(--line)}.game-metrics .train-mark--small{transform:scale(.64)}.game-metrics strong{color:var(--blue);font-size:.96rem}.game-metrics>.game-metrics__destination{min-width:0;padding:0 3px}.game-metrics__destination>span{white-space:nowrap;flex:none}.game-metrics__destination strong{text-overflow:ellipsis;white-space:nowrap;min-width:0;max-width:100%;font-size:.74rem;font-weight:950;overflow:hidden}.destination-intro{z-index:80;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#08234e2e;place-items:center;padding:24px;display:grid;position:absolute;inset:0}.destination-intro__card{width:min(86%,330px);min-height:82px;box-shadow:var(--neu-shadow-lg), inset 2px 2px 4px #ffffffb8;color:var(--navy);letter-spacing:-.04em;white-space:nowrap;will-change:transform, opacity;background:linear-gradient(145deg,#fbfdff,#e9eff5);border:2px solid #ffffffbd;border-radius:22px;justify-content:center;align-items:baseline;gap:8px;padding:16px 22px;font-weight:950;display:flex}.destination-intro__card span{font-size:1rem}.destination-intro__card strong{color:var(--blue);font-size:clamp(1.25rem,6vw,1.55rem)}.current-route-panel{width:calc(100% - 28px);min-width:0;max-width:calc(100% - 28px);box-shadow:var(--neu-shadow-sm);background:linear-gradient(145deg,#fbfdff,#e9eff5);border:1px solid #08234e14;border-radius:16px;margin:0 14px 7px;padding:7px 10px 6px;overflow:hidden}.current-route-panel .journey-heading{gap:10px}.current-route-panel .journey-heading p{margin-bottom:0;font-size:.62rem}.current-route-panel .journey-heading strong{font-size:.82rem}.current-route-panel .journey-heading>span{font-size:1rem}.current-route-panel .journey-heading>span small{font-size:.58rem}.current-route-panel .journey-path{margin-top:4px;padding:2px 1px 3px}.current-route-panel .journey-station{border-radius:10px;min-width:55px;min-height:34px;padding:3px 5px}.current-route-panel .journey-station i{border-width:3px;width:10px;height:10px}.current-route-panel .journey-station strong{max-width:58px;font-size:.59rem}.current-route-panel .journey-link{width:20px;height:4px}.map-viewport{contain:layout paint size;isolation:isolate;background:#fffdf8;width:100%;min-width:0;max-width:100%;min-height:0;position:relative;overflow:hidden}.map-surface{z-index:1;opacity:0;transform-origin:0 0;will-change:transform;contain:layout paint style;background-image:radial-gradient(#08234e0d 1px,#0000 1px);background-size:22px 22px;position:absolute;top:0;left:0}.map-surface--ready{opacity:1;transition:transform .3s cubic-bezier(.45,0,.2,1),opacity 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section>span{box-shadow:var(--neu-shadow-sm)}.toggle:after{box-sizing:border-box;background:linear-gradient(145deg,#fff,#edf2f6);border:1px solid #08234e1f;top:2px;left:2px;box-shadow:0 2px 5px #08234e47,inset 0 1px 1px #ffffffe6}.rules-list aside{box-shadow:var(--neu-inset-soft)}.toggle--on{background:linear-gradient(145deg,#1259bd,#2479df);border-color:#0a49a2b8;box-shadow:inset 2px 2px 5px #0027626b,inset -1px -1px 3px #5ba0f773,0 1px 2px #083e8b33}.toggle--on:after{box-shadow:0 2px 5px #031f485c,inset 0 1px 1px #ffffffe6}.toast{box-shadow:-5px -5px 13px #ffffff94,7px 7px 16px #08234e47}@media (min-width:620px){.app-shell{border-color:#08234e0f;box-shadow:-15px -15px 36px #ffffffe0,18px 18px 42px #4a5b6d3b}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition-duration:.01ms!important}}@media (min-height:740px){.home-screen .challenge-card__header{min-height:54px}.challenge-card--empty{height:274px;min-height:274px}.home-screen .challenge-card__header 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