:root{--panel-bg:#161e34a3;--panel-border:#ffffff1f;--text:#fdf6ec;--muted:#fdf6eca3;--accent:#ff8a5b;--accent-2:#ffd58a;--navy:#1c2c47;color:var(--text);--sat:env(safe-area-inset-top,0px);--sab:env(safe-area-inset-bottom,0px);--sal:env(safe-area-inset-left,0px);--sar:env(safe-area-inset-right,0px);font-family:Pretendard,Apple SD Gothic Neo,Noto Sans KR,system-ui,sans-serif}*{box-sizing:border-box}html,body,#root{background:#c9d6e3;width:100%;height:100%;margin:0;overflow:hidden}html{overscroll-behavior:none;-webkit-tap-highlight-color:transparent;-webkit-text-size-adjust:100%}#root{height:100dvh}button,a{touch-action:manipulation}canvas{touch-action:none}.panel{background:var(--panel-bg);-webkit-backdrop-filter:blur(14px)saturate(140%);border:1px solid var(--panel-border);z-index:20;color:var(--text);border-radius:16px;padding:14px 16px;position:fixed;box-shadow:0 10px 30px #080c1859}.hud-top{top:calc(16px + var(--sat));left:calc(16px + var(--sal));right:calc(16px + var(--sar));z-index:21;pointer-events:none;justify-content:space-between;align-items:flex-start;gap:12px;display:flex;position:fixed}.hud-top>*{pointer-events:auto}.hud-top .panel{position:relative}.course{flex:none;width:min(300px,100vw - 32px);max-height:calc(100vh - 200px);overflow-y:auto}.eyebrow{color:var(--accent-2);font-size:12px;font-weight:700}.course-head{align-items:center;gap:8px;display:flex}.course-head .eyebrow{margin-right:auto}.fold-button{width:24px;height:24px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:6px;place-items:center;margin:-4px -6px -4px 0;display:grid}.fold-button:hover,.side-head:hover .fold-icon{color:var(--text)}.fold-button:hover{background:#ffffff14}.fold-icon{flex:none;transition:transform .15s}[aria-expanded=false]>.fold-icon,[aria-expanded=false].fold-button .fold-icon{transform:rotate(-90deg)}.side-stack{pointer-events:none;flex-direction:column;align-items:flex-end;gap:8px;min-width:0;display:flex}.side-stack>*{pointer-events:auto}.side-panel{max-width:100%;padding:8px 10px}.side-head{width:100%;font:inherit;color:var(--muted);text-align:left;cursor:pointer;background:0 0;border:0;align-items:center;gap:8px;padding:2px 4px;display:flex}.side-title{color:var(--text);font-size:13px;font-weight:800}.side-sub{align-items:center;gap:4px;margin-right:auto;font-size:12px;display:flex}.side-body{margin-top:8px}.avatar-mini{width:22px;height:22px;margin:-4px 0}.help-panel{width:300px}.help-list{gap:8px;margin:0;padding:0 4px 4px;display:grid}.help-row{grid-template-columns:112px 1fr;align-items:start;gap:10px;display:grid}.help-row dt{flex-wrap:wrap;align-items:center;gap:4px;display:flex}.help-keys{align-items:center;gap:3px;display:inline-flex}.help-or{color:var(--muted);margin-right:1px;font-size:11px}kbd{min-width:22px;font:inherit;text-align:center;color:var(--text);background:#ffffff14;border:1px solid #ffffff38;border-bottom-width:2px;border-radius:6px;padding:1px 6px;font-size:11px;font-weight:700;line-height:18px;display:inline-block}.help-row dd{color:var(--text);margin:0;padding-top:1px;font-size:13px;font-weight:600}.help-row small{color:var(--muted);margin-top:1px;font-size:11px;font-weight:400;display:block}@media (hover:none),(pointer:coarse),(pointer:none),(width<=760px){.help-panel{display:none}}.link-button{font:inherit;color:var(--accent-2);text-underline-offset:3px;cursor:pointer;background:0 0;border:0;padding:2px 0;font-size:12px;font-weight:700;text-decoration:underline}.mountain-tabs{scrollbar-width:none;gap:6px;margin:8px 0 0;display:flex;overflow-x:auto}.mountain-tab{text-align:left;font:inherit;color:var(--text);cursor:pointer;background:#ffffff0a;border:1.5px solid #ffffff26;border-radius:10px;flex:1 0 auto;gap:1px;padding:6px 10px;display:grid}.mountain-tab:hover{border-color:#fff6}.mountain-tab.selected{border-color:var(--accent-2);cursor:default;background:#ffd58a24}.mountain-tab-name{font-size:14px;font-weight:700}.mountain-tab-meta{color:var(--muted);font-size:11px}.level{color:#b9eaa9;background:#8cd6802e;border-radius:999px;padding:1px 6px;font-size:11px;font-weight:700}.level-보통{color:var(--accent-2);background:#ffd58a2e}.level-어려움{color:#ffadad;background:#ff787833}.course h1{margin:2px 0;font-size:20px}.course-meta{color:var(--muted);font-size:13px}.stats{grid-template-columns:repeat(3,1fr);gap:8px;margin:12px 0 0;display:grid}.stats div{background:#ffffff12;border-radius:8px;padding:6px 8px}.stats dt{color:var(--muted);font-size:11px}.stats dd{margin:2px 0 0;font-size:14px;font-weight:700}.sections{margin:12px 0 0;padding:0;font-size:13px;list-style:none}.sections li{color:var(--muted);justify-content:space-between;gap:8px;padding:5px 0 5px 18px;display:flex;position:relative}.sections li:before{content:"";background:0 0;border:2px solid #ffffff4d;border-radius:50%;width:8px;height:8px;margin-top:-4px;position:absolute;top:50%;left:3px}.sections li.done{color:#fdf6ec66}.sections li.done:before{background:#fdf6ec8c;border-color:#fdf6ec8c}.sections li.now{color:var(--text);font-weight:700}.sections li.now:before{border-color:var(--accent);background:var(--accent)}.sec-meta{white-space:nowrap;font-variant-numeric:tabular-nums}.progress{left:50%;bottom:calc(16px + var(--sab));width:min(460px,100vw - 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32px);padding:18px;animation:.45s cubic-bezier(.2,.8,.2,1) both lobby-in;display:flex;top:16px;bottom:76px;left:16px;overflow-y:auto;position:absolute!important}.lobby-panel>*{flex-shrink:0}.lobby-actions>*,.lobby-avatars,.lobby-sky,.lobby-control{min-width:0}.lobby-head h2{letter-spacing:-.01em;margin:2px 0 0;font-size:24px}.lobby-label{color:var(--muted);margin-bottom:6px;font-size:12px;font-weight:700}.lobby-label b{color:var(--text);margin-left:4px}.lobby-note{color:var(--muted);margin:0;font-size:13px}.lobby .mountain-tabs{margin:0}.lobby-courses{gap:8px;display:grid}.course-card,.segmented button{text-align:left;font:inherit;color:var(--text);cursor:pointer;background:#ffffff0a;border:1.5px solid #ffffff24;border-radius:12px;display:grid}.course-card{gap:5px;width:100%;padding:11px 12px 10px;transition:border-color .15s,background .15s,transform .15s}.course-card:hover{border-color:#ffffff61;transform:translateY(-1px)}.course-card.selected{border-color:var(--accent);background:#ff8a5b21;box-shadow:0 0 0 3px #ff8a5b29}.course-card-top{align-items:center;gap:6px;display:flex}.course-card-name{font-size:15px;font-weight:800}.course-card-tag{color:var(--navy);background:var(--accent-2);border-radius:999px;margin-left:auto;padding:1px 7px;font-size:11px;font-weight:700}.course-card-route{color:var(--muted);font-size:12px}.course-card-profile{width:100%;height:34px;display:block}.course-card-profile path{fill:#ffd58a24;stroke:#ffd58ab3;stroke-width:1.3px;vector-effect:non-scaling-stroke}.course-card.selected .course-card-profile path{fill:#ff8a5b38;stroke:var(--accent)}.course-card-stats{color:var(--muted);flex-wrap:wrap;gap:2px 10px;font-size:12px;display:flex}.course-card-done{color:var(--accent-2);font-weight:700}.course-card-live{color:#9fe39a;font-weight:700}.segmented{grid-template-columns:1fr 1fr;gap:6px;display:grid}.segmented button{gap:1px;padding:9px 12px}.segmented button:hover{border-color:#ffffff61}.segmented button.selected{border-color:var(--accent-2);background:#ffd58a21}.segmented-title{font-size:14px;font-weight:800}.segmented-sub{color:var(--muted);align-items:center;gap:5px;font-size:11px;display:flex}.lobby-actions{pointer-events:auto;--lobby-from:18px 0;gap:10px;width:min(440px,100vw - 32px);animation:.45s cubic-bezier(.2,.8,.2,1) 80ms both lobby-in;display:grid;position:absolute;bottom:28px;right:16px}.lobby-avatars,.lobby-sky,.lobby-control{padding:10px 12px}.control-segmented .segmented-title{font-size:15px}.control-segmented .segmented-sub{font-size:12px}.sky-segmented{grid-template-columns:repeat(5,1fr);gap:8px}.sky-segmented button{text-align:center;border-radius:14px;justify-items:center;gap:6px;padding:5px 5px 7px;transition:transform .15s,border-color .15s,background .15s,box-shadow .15s}.sky-segmented button:active{transform:scale(.96)}.sky-segmented button.selected{box-shadow:0 0 0 3px #ffd58a29}.sky-segmented .segmented-title{font-size:12px}.sky-swatch{aspect-ratio:5/3;background:var(--swatch);border-radius:9px;width:100%;transition:transform .2s;position:relative;overflow:hidden;box-shadow:inset 0 0 0 1px #ffffff24}.sky-segmented button:hover .sky-swatch{transform:scale(1.04)}.sky-swatch:after{content:"";pointer-events:none;position:absolute;inset:0}.sky-swatch.dawn{--swatch:linear-gradient(180deg, #2f3d6e 0%, #8a9ccf 55%, #f1b48d 100%)}.sky-swatch.dawn:after{background:radial-gradient(circle at 50% 108%,#ffbe78e6 0,#ffbe7800 38%)}.sky-swatch.morning{--swatch:linear-gradient(180deg, #6aa7e6 0%, #b9d9f6 60%, #fde2b8 100%)}.sky-swatch.morning:after{background:radial-gradient(circle at 28% 78%,#fff3c4 0 11%,#fff3c400 13%)}.sky-swatch.day{--swatch:linear-gradient(180deg, #4a9ae6 0%, #a6d2f6 65%, #e6f3fc 100%)}.sky-swatch.day:after{background:radial-gradient(circle at 70% 26%,#fff8dc 0 12%,#fff8dc00 15%)}.sky-swatch.sunset{--swatch:linear-gradient(180deg, #3c3270 0%, #c95d6e 48%, #ffb15a 100%)}.sky-swatch.sunset:after{background:radial-gradient(circle at 50% 92%,#ffe3a0 0,#ffd27a 12%,#ffb45a00 30%)}.sky-swatch.night{--swatch:linear-gradient(180deg, #0b1130 0%, #222c57 100%)}.sky-swatch.night:after{background:radial-gradient(circle at 74% 30%,#e9eeff 0 9%,#e9eeff00 11%),radial-gradient(circle at 18% 24%,#fff 0 2%,#0000 3%),radial-gradient(circle at 38% 58%,#fff 0 2%,#0000 3%),radial-gradient(circle at 56% 20%,#fff 0 2%,#0000 3%),radial-gradient(circle at 30% 80%,#fff 0 1.5%,#0000 3%),radial-gradient(circle at 86% 66%,#fff 0 2%,#0000 3%)}.lobby-buttons{gap:8px;display:flex}.lobby-restart{flex:none;padding:14px 18px}.lobby-start{border-radius:14px;flex:1;justify-content:center;align-items:center;gap:10px;padding:16px;font-size:18px;font-weight:800;transition:transform .15s,box-shadow .15s;display:flex;box-shadow:0 10px 30px #ff8a5b59,inset 0 1px #fff6}.lobby-start:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 14px 36px #ff8a5b73,inset 0 1px #fff6}.lobby-start:disabled{opacity:.5;cursor:default}.lobby-key{opacity:.7;border:1px solid #2a16084d;border-radius:6px;padding:1px 6px;font-size:11px;font-weight:700}@media (hover:none),(pointer:coarse),(pointer:none){.lobby-key{display:none}}@media (width<=760px){.lobby{background:linear-gradient(#0000 45%,#0e14268c);flex-direction:column;justify-content:flex-end;display:flex}.lobby-panel{--lobby-from:0 24px;border-bottom:0;border-radius:20px 20px 0 0;width:100%;max-height:38vh;top:auto;bottom:auto;left:auto;position:relative!important}.lobby-actions{width:100%;padding:8px calc(12px + var(--sar)) calc(14px + var(--sab)) calc(12px + var(--sal));background:var(--panel-bg);-webkit-backdrop-filter:blur(14px);--lobby-from:0 24px;position:relative;bottom:auto;right:auto}.lobby-avatars,.lobby-sky,.lobby-control{box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:0 0;border:0;padding:0}}@media (prefers-reduced-motion:reduce){.lobby,.lobby-panel,.lobby-actions{animation:none}.sky-segmented button,.sky-swatch{transition:none}}