:root{font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;color:#4c392b;background:#f5eee1;font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,a{touch-action:manipulation}button{font:inherit;cursor:pointer}a{color:inherit}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #9a703b;outline-offset:4px}[hidden]{display:none!important}.intro{max-width:580px;margin:auto;padding:28px 25px 36px}.back{font-size:16px;text-decoration:none}.eyebrow{margin-top:36px;font-size:14px;letter-spacing:.08em;color:#856b4e}h1{font-size:48px;line-height:1.12;letter-spacing:-.06em;margin:12px 0 20px;font-weight:700}.booth-name{font-size:20px;line-height:1.5;margin:0 0 24px}.poster-preview{display:flex;align-items:center;gap:24px;padding:20px 24px;border-radius:24px;background:#e9decd}.poster-preview img{height:170px;width:auto;max-width:48%;object-fit:contain;box-shadow:0 5px 15px #4c392b18}.poster-preview span{font-size:18px;line-height:1.6}.lead{font-size:17px;line-height:1.8;margin:24px 0 20px}.primary{width:100%;border:0;border-radius:18px;background:#74573c;color:white;padding:18px;font-size:19px;font-weight:650}.primary:disabled{opacity:.6;cursor:wait}#status{font-size:14px;line-height:1.8;color:#7d6c58;min-height:48px}.links{display:flex;flex-wrap:wrap;gap:12px 22px;margin:22px 0}.links a,.links button{font-size:15px;padding:10px 0;min-height:44px;background:none;border:0;color:#735033;text-decoration:underline;text-underline-offset:4px}details{border-top:1px solid #d9cdbb;padding:22px 0;font-size:16px;line-height:1.8}summary{cursor:pointer;font-weight:600}ol{padding-left:23px}.privacy,footer{font-size:13px;line-height:1.8;color:#82705b}footer{margin-top:35px}.stage{position:fixed;inset:0;background:#191816;overflow:hidden}.plane{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}.plane video,.plane canvas{position:absolute;inset:0;width:100%;height:100%;display:block}.plane video{object-fit:contain}.plane canvas{z-index:1;pointer-events:none}.stage-top,.stage-bottom{position:absolute;z-index:3;color:#fff;left:0;right:0;padding:20px max(20px,env(safe-area-inset-right))}.stage-top{top:0;padding-top:max(20px,env(safe-area-inset-top));display:flex;align-items:center;justify-content:space-between;gap:12px;background:linear-gradient(#171512d9,transparent)}.stage-top span{font-size:16px;font-weight:650}.stage-top button,.stage-bottom button{background:#fff4e9ed;color:#443626;border:1px solid #ffffff50;border-radius:24px;padding:12px 20px;font-size:17px;min-height:46px}.stage-bottom{bottom:0;padding-bottom:max(20px,env(safe-area-inset-bottom));text-align:center;background:linear-gradient(transparent,#171512e8);pointer-events:none}.stage-bottom button{pointer-events:auto}.stage-bottom p{font-size:16px;line-height:1.6;margin:12px 0;text-shadow:0 1px 5px #000}#learning{font-size:12px;color:#e3d5c4}.stage.tracked #modeLabel{color:#efcf90}.stage.preview{background:radial-gradient(ellipse at center,#63513d,#27251e)}@media(max-width:360px){h1{font-size:42px}.intro{padding:22px 20px}.poster-preview{gap:14px;padding:18px}.poster-preview img{height:135px}.poster-preview span{font-size:16px}}

/* Compact teaching card keeps the poster visible; visitors can collapse it. */
.stage-bottom{max-width:580px;left:50%;right:auto;width:100%;transform:translateX(-50%);padding:0 12px max(12px,env(safe-area-inset-bottom));background:none;text-align:left}
.stage-bottom #tracking{font-size:13px;text-align:center;margin:0 6px 8px;line-height:1.45;color:#f3e8d8}
.lesson-panel{pointer-events:auto;border-radius:26px;background:#f5eee1f5;color:#493e32;box-shadow:0 12px 50px #0003;padding:12px 16px 14px;max-height:49dvh;overflow:auto;overscroll-behavior:contain;border:1px solid #fff8;scrollbar-width:thin}
.lesson-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;color:#766245;font-size:13px;font-weight:650}
.stage-bottom button{font-size:14px;padding:10px 12px;border-radius:14px;min-height:44px;border:0;background:#e8dfd0;color:#4c4032;white-space:nowrap}
.stage-bottom button:disabled{opacity:.5;cursor:default}
.stage-bottom #collapse{font-size:12px;background:none;padding:8px;min-height:36px}
.steps{display:flex;gap:6px;margin:7px 0 12px}.steps button{flex:1;font-size:13px;padding:10px 5px;background:#ece4d7}.steps button[aria-pressed=true]{background:#75624a;color:#fff6e8}
.lesson-copy{min-height:90px}.lesson-copy h2{font-size:19px;line-height:1.4;letter-spacing:-.035em;margin:0 0 7px}
.stage-bottom .lesson-copy p{font-size:15px;line-height:1.6;margin:0;text-shadow:none;word-break:keep-all}
.lesson-actions{display:flex;flex-wrap:wrap;gap:6px;margin-top:13px}.lesson-actions #motion{background:#344e48;color:#fff}.lesson-actions button{flex:1}
.stage-bottom #learning{font-size:11px;line-height:1.55;color:#7b6b58;text-shadow:none;margin:10px 0 0;word-break:keep-all}
.answers{display:flex;gap:8px;margin-top:12px}.answers button{flex:1;background:#dce8df;font-size:16px;font-weight:650}
.stage-bottom #challengeStatus{font-size:13px;margin:7px 0 0;color:#7a5035;text-shadow:none;line-height:1.5}
.lesson-panel.collapsed{padding:8px 16px}.stage.preview{background:radial-gradient(ellipse at 50% 35%,#596b60 0%,#2d403c 45%,#1c2b29 100%)}
@media(max-width:380px){.lesson-panel{padding:10px 12px}.lesson-copy h2{font-size:18px}.lesson-actions button{font-size:13px;padding:10px}.stage-top{padding-left:14px;padding-right:14px}}
@media(orientation:landscape) and (max-height:600px){.stage-bottom{left:auto;right:12px;bottom:8px;width:45%;max-width:380px;transform:none;padding:0}.lesson-panel{max-height:calc(100dvh - 100px)}.stage-bottom #tracking{font-size:11px}.stage-top{padding-top:10px}.stage-top button{padding:9px 15px}.lesson-heading{font-size:12px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important}}

.stage.tracked #tracking {background:rgba(23,48,37,.88);color:#fff;border-color:rgba(255,255,255,.3)}