:root { color-scheme: only light; }
* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; }
button { font: inherit; }
.hidden { display: none !important; }
.game {
  --navy: #072f41;
  --yellow: #ffe05a;
  --orange: #ff7a28;
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  color: #103b48;
  background: #7ad9d4;
  font-family: "Trebuchet MS", Arial, sans-serif;
}
.hud {
  position: absolute; z-index: 20; inset: 0 0 auto; height: 78px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 22px; color: #fff;
  background: linear-gradient(90deg, #062c3c, #085361);
  border-bottom: 4px solid var(--orange); box-shadow: 0 7px 0 rgba(6,41,53,.24);
}
.logo { color: var(--yellow); font-family: Impact, "Arial Narrow", sans-serif; font-size: 29px; font-style: italic; line-height: .8; letter-spacing: 1px; }
.logo span { color: #fff; }
.logo small { display: block; margin-top: 10px; color: #8ce8e7; font-family: Arial, sans-serif; font-size: 8px; font-style: normal; letter-spacing: 2px; }
.meters { display: flex; gap: 6px; }
.meters > span { min-width: 92px; padding: 7px 10px; border: 1px solid rgba(154,239,239,.32); border-radius: 7px; background: rgba(0,18,26,.28); transition: .15s; }
.meters small, .meters b { display: block; }
.meters small { color: #8dcfd1; font-size: 7px; font-weight: 900; letter-spacing: 1.1px; }
.meters b { margin-top: 1px; color: #fff; font-family: Impact, "Arial Narrow", sans-serif; font-size: 17px; font-weight: 500; }
.meters .hot { background: #e75d1b; border-color: #ffe26c; transform: skew(-3deg) scale(1.03); }
.meters .hot small, .meters .hot b { color: #fff6a6; }
.course { position: absolute; z-index: 2; inset: 78px 0 48px; overflow: hidden; background: linear-gradient(#8fe6de,#3da796); }
.cliffs { position: absolute; z-index: 6; left: -2%; width: 104%; height: 12%; background: linear-gradient(#2d804e 0 32%,#68a94b 33% 54%,#a06e3b 55% 72%,#5d432b 73%); box-shadow: 0 6px 0 rgba(255,255,255,.42); }
.cliffs.top { top: 0; clip-path: polygon(0 0,100% 0,100% 66%,91% 91%,80% 67%,68% 96%,55% 71%,44% 94%,30% 64%,17% 91%,7% 72%,0 86%); }
.cliffs.bottom { bottom: 0; transform: rotate(180deg); clip-path: polygon(0 0,100% 0,100% 66%,91% 91%,80% 67%,68% 96%,55% 71%,44% 94%,30% 64%,17% 91%,7% 72%,0 86%); }
.cliffs i { position: absolute; width: 28px; height: 28px; top: 12%; border-radius: 50%; background: #1c643e; box-shadow: 17px 7px 0 #267645,-12px 9px 0 #185b38; }
.cliffs i:nth-child(1) { left: 10%; }.cliffs i:nth-child(2) { left: 48%; }.cliffs i:nth-child(3) { left: 84%; }
.river { position: absolute; inset: 8% 0; overflow: hidden; background: repeating-linear-gradient(98deg,transparent 0 118px,rgba(255,255,255,.28) 123px 130px,transparent 136px 215px),linear-gradient(#3dd2d0,#067d9d 55%,#25b5bd); box-shadow: inset 0 20px 34px rgba(0,55,74,.35),inset 0 -20px 34px rgba(0,55,74,.3); }
.water-lines { position: absolute; inset: 0; opacity: .36; background: repeating-linear-gradient(93deg,transparent 0 160px,rgba(255,255,255,.65) 165px 174px,transparent 181px 295px); animation: current 2.4s linear infinite; }
.boost-mode .water-lines { animation-duration: .8s; opacity: .55; }
@keyframes current { to { background-position-x: -295px; } }
.lane-line { position: absolute; left: 0; right: 0; height: 2px; background: linear-gradient(90deg,transparent,rgba(230,255,255,.23),transparent); transform: translateY(-50%); }
.lane-a { top: 30%; }.lane-b { top: 55%; }.lane-c { top: 80%; }
.problem-dock { position: absolute; z-index: 12; top: 1.5%; left: 2%; right: 2%; min-height: 76px; display: grid; grid-template-columns: 72px 1fr minmax(260px,auto); align-items: center; gap: 14px; padding: 8px 15px; color: #fff; border: 2px solid rgba(255,224,90,.8); border-radius: 9px; background: rgba(5,42,56,.94); box-shadow: 0 6px 0 rgba(4,35,47,.28); }
.problem-number { color: var(--yellow); font-family: Impact, "Arial Narrow", sans-serif; font-size: 15px; letter-spacing: 1px; }
.problem-number span { display: block; margin-top: 5px; color: #fff; font-family: Arial, sans-serif; font-size: 10px; font-weight: 900; letter-spacing: .5px; white-space: nowrap; }
.problem-dock h2 { margin: 0; color: #fff; font-family: Impact, "Arial Narrow", sans-serif; font-size: clamp(19px,2.2vw,29px); font-weight: 500; line-height: 1; }
.problem-dock p { margin: 4px 0 0; color: #bde9e8; font-size: 11px; font-weight: 800; }
.problem-dock small { display: block; margin-top: 3px; color: #ffd86e; font-size: 8px; font-weight: 900; letter-spacing: .7px; }
.problem-dock > strong { padding: 10px 14px; color: #0d3d48; border-radius: 6px; background: #eaffdf; font-family: Impact, "Arial Narrow", sans-serif; font-size: clamp(20px,2.5vw,31px); font-weight: 500; text-align: center; white-space: nowrap; box-shadow: inset 0 -3px 0 #9bd8c9; }
.answer-stack { position: absolute; z-index: 10; top: 0; bottom: 0; width: 210px; transform: translateX(-50%); }
.answer-gate { position: absolute; left: 0; width: 210px; min-height: 74px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #fff; border: 4px solid #ffe268; border-radius: 9px; background: linear-gradient(120deg,#09384a,#08717b); box-shadow: -8px 8px 0 rgba(4,43,55,.28); transform: translateY(-50%); }
.answer-gate::before,.answer-gate::after { content: ""; position: absolute; top: -10px; bottom: -10px; width: 7px; border: 2px solid #f2ad36; background: #71431d; }
.answer-gate::before { left: -8px; }.answer-gate::after { right: -8px; }
.answer-gate small { color: #93e8e7; font-size: 8px; font-weight: 900; letter-spacing: 1.2px; }
.answer-gate strong { max-width: 195px; overflow-wrap: anywhere; color: #fff; font-family: Impact, "Arial Narrow", sans-serif; font-size: clamp(23px,2.7vw,35px); font-weight: 500; line-height: 1; }
.raft-wrap { position: absolute; z-index: 11; left: 17%; top: 55%; width: clamp(150px,18vw,255px); aspect-ratio: 2.1/1; transform: translate(-50%,-50%); transition: top .22s ease,transform .16s ease; filter: drop-shadow(0 11px 4px rgba(0,45,61,.36)); }
.raft-wrap img { width: 100%; height: 100%; object-fit: contain; user-select: none; }
.raft-wrap.boosting { transform: translate(-50%,-50%) rotate(-2deg) scale(1.04); filter: drop-shadow(0 11px 4px rgba(0,45,61,.36)) drop-shadow(0 0 14px #ffdb59); }
.boost-wake { position: absolute; z-index: -1; right: 72%; top: 44%; color: rgba(255,255,255,.85); font-family: Impact, sans-serif; font-size: 30px; letter-spacing: -8px; white-space: nowrap; opacity: .5; transform: translateY(-50%); }
.raft-wrap.boosting .boost-wake { color: #fff5a1; font-size: 45px; opacity: 1; animation: wake .35s linear infinite; }
@keyframes wake { 50% { transform: translate(-12px,-50%) scaleX(1.14); } }
.log { position: absolute; z-index: 9; width: 83px; height: 30px; border: 4px solid #57351c; border-radius: 42% 55% 45% 40%; background: repeating-linear-gradient(90deg,#a56a32 0 17px,#754322 18px 23px); box-shadow: 0 7px 0 rgba(0,54,70,.24); transform: translate(-50%,-50%); }
.log i { position: absolute; width: 22px; height: 8px; top: -8px; border-radius: 5px; background: #3c7c3b; transform: rotate(-25deg); }.log i:first-child { left: 10px; }.log i:last-child { right: 10px; transform: rotate(25deg); }
.race-message { position: absolute; z-index: 15; left: 16px; bottom: 15%; max-width: 470px; padding: 8px 12px; color: #fff; border-left: 5px solid var(--yellow); background: rgba(6,45,59,.88); font-size: 11px; font-weight: 900; box-shadow: 5px 5px 0 rgba(0,0,0,.13); }
.controls { position: absolute; z-index: 18; right: 15px; bottom: 14%; display: flex; gap: 7px; }
.controls button { min-height: 48px; padding: 0 17px; color: #fff; border: 2px solid rgba(255,255,255,.65); border-radius: 8px; background: #075668; box-shadow: 0 5px 0 #063744; font-family: Impact, "Arial Narrow", sans-serif; font-size: 17px; cursor: pointer; touch-action: manipulation; }
.controls button:active { transform: translateY(4px); box-shadow: 0 1px 0 #063744; }
.controls .boost-button { min-width: 180px; color: #153e48; border-color: #fff09a; background: linear-gradient(#ffe76d,#ffc936); box-shadow: 0 5px 0 #c97918; }
.controls .boost-button:active { color: #fff; background: #f16e20; }.boost-button b { margin-left: 10px; font-size: 25px; }
.panel { position: absolute; z-index: 30; top: 51%; left: 50%; width: min(720px,calc(100% - 32px)); max-height: calc(100vh - 155px); overflow-y: auto; padding: clamp(25px,4vw,46px); color: #173f4a; text-align: center; border: 4px solid #ffe36c; border-radius: 16px; background: rgba(247,255,239,.98); box-shadow: 0 14px 0 rgba(5,55,65,.34),0 24px 55px rgba(5,40,50,.43); transform: translate(-50%,-50%); animation: pop .28s ease-out; }
@keyframes pop { from { opacity: 0; transform: translate(-50%,-45%) scale(.96); } }
.panel::before { content: ""; position: absolute; inset: 8px; pointer-events: none; border: 1px dashed rgba(7,110,111,.25); border-radius: 10px; }
.panel h1,.panel h2 { position: relative; margin: 5px 0 13px; color: #07394a; font-family: Impact, "Arial Narrow", sans-serif; font-weight: 500; line-height: .9; text-transform: uppercase; }
.panel h1 { font-size: clamp(55px,8vw,92px); font-style: italic; letter-spacing: -2px; text-shadow: 4px 5px 0 #a8dfd0; }.panel h1 em { color: var(--orange); text-shadow: 4px 5px 0 #ffe16a; }
.panel h2 { font-size: clamp(36px,5vw,55px); }
.panel > p { position: relative; max-width: 610px; margin: 0 auto 20px; color: #365e68; font-size: clamp(14px,1.8vw,18px); font-weight: 700; line-height: 1.48; }
.eyebrow { position: relative; margin-bottom: 12px; color: #087b82; font-family: Impact, "Arial Narrow", sans-serif; font-size: 14px; letter-spacing: 2px; }
.intro-controls { position: relative; display: flex; justify-content: center; flex-wrap: wrap; gap: 7px; margin: 19px 0 23px; }.intro-controls span { padding: 8px 11px; color: #fff; border-radius: 6px; background: #0b6972; font-size: 10px; font-weight: 900; }
.primary { position: relative; min-width: 225px; padding: 14px 24px; color: #fff; border: 0; border-radius: 8px; background: linear-gradient(#ff8e35,#e75d1b); box-shadow: 0 6px 0 #9c3c13; font-family: Impact, "Arial Narrow", sans-serif; font-size: 21px; letter-spacing: .6px; cursor: pointer; }.primary:active { transform: translateY(4px); box-shadow: 0 2px 0 #9c3c13; }.primary b { margin-left: 12px; color: #ffef87; }
.how-grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 11px; margin: 20px 0; }.how-grid div { padding: 18px; border: 2px solid #8accc0; border-radius: 10px; background: #dcf3df; }.how-grid b { display: block; color: #ed6d22; font-family: Impact,sans-serif; font-size: 40px; }.how-grid strong { display: block; margin: 5px 0; color: #0a5662; font-size: 13px; }.how-grid p { margin: 0; color: #4c6d6f; font-size: 11px; font-weight: 800; line-height: 1.4; }
.note { max-width: 570px; padding: 9px 13px; color: #0a6f68 !important; border-radius: 7px; background: #e5f2d9; font-size: 11px !important; }
.level-badge { position: relative; display: inline-block; margin-bottom: 12px; padding: 7px 18px; color: #123d48; border: 3px solid #fff; border-radius: 30px; box-shadow: 0 4px 0 #40796f; font-family: Impact,sans-serif; font-size: 17px; letter-spacing: 1px; }.level-details { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin: 19px 0 25px; }.level-details span { padding: 13px; border: 2px solid #87c9bd; border-radius: 8px; background: #def3df; }.level-details small,.level-details b { display: block; }.level-details small { color: #578174; font-size: 8px; font-weight: 900; }.level-details b { margin-top: 4px; color: #0b5863; font-size: 13px; }
.feedback-panel { border-color: #ff9a58; }.worked-steps { position: relative; max-width: 580px; margin: 18px auto 24px; text-align: left; border: 2px solid #86c8ba; border-radius: 10px; background: #e3f3e4; overflow: hidden; }.worked-steps div { display: flex; align-items: center; gap: 12px; padding: 10px 13px; border-top: 1px solid #c5ded7; color: #28535b; font-size: 14px; font-weight: 800; }.worked-steps div:first-child { border-top: 0; }.worked-steps b { flex: 0 0 26px; height: 26px; display: grid; place-items: center; color: #fff; border-radius: 50%; background: #f17426; }
.correct-flash { position: absolute; z-index: 35; top: 50%; left: 50%; display: flex; align-items: center; gap: 15px; padding: 18px 30px; color: #fff; border: 5px solid #a9f089; border-radius: 14px; background: #129c64; box-shadow: 0 9px 0 #08734b,0 20px 45px rgba(0,50,57,.38); transform: translate(-50%,-50%) rotate(-2deg); }.correct-flash b { width: 55px; height: 55px; display: grid; place-items: center; border: 4px solid #fff; border-radius: 50%; font-size: 34px; }.correct-flash span { font-family: Impact,sans-serif; font-size: 30px; }
.trophy { position: relative; font-size: 70px; }.finish-stats { position: relative; display: grid; grid-template-columns: repeat(4,1fr); gap: 7px; margin: 17px 0; }.finish-stats span { padding: 11px 5px; color: #fff; border-radius: 8px; background: #0a6972; }.finish-stats b,.finish-stats small { display: block; }.finish-stats b { color: #ffe56e; font-family: Impact,sans-serif; font-size: 25px; }.finish-stats small { font-size: 7px; font-weight: 900; }.reward-shelf { position: relative; display: flex; justify-content: center; flex-wrap: wrap; gap: 6px; margin: 15px 0 22px; }.reward-shelf span { padding: 7px 10px; color: #694d0a; border: 1px solid #dcb941; border-radius: 20px; background: #fff0a3; font-size: 10px; font-weight: 900; }
.progress-bar { position: absolute; z-index: 22; inset: auto 0 0; height: 48px; color: #b5e1df; background: #062e3c; overflow: hidden; }.progress-bar::before { content: "RALLY PROGRESS"; position: absolute; z-index: 2; left: 15px; top: 8px; font-size: 7px; font-weight: 900; }.progress-bar > div { position: absolute; left: 0; bottom: 0; height: 7px; background: linear-gradient(90deg,#13b994,#ffe05a,#f27827); transition: width .5s ease; }.progress-bar span { position: absolute; z-index: 2; right: 15px; top: 13px; color: #fff; font-size: 9px; font-weight: 900; text-transform: uppercase; }
@media(max-width:820px){.hud{height:70px;padding:7px 10px}.logo{font-size:22px}.meters>span{min-width:67px;padding:5px}.meters>span:nth-child(2),.meters>span:nth-child(4){display:none}.meters b{font-size:14px}.course{inset:70px 0 44px}.problem-dock{grid-template-columns:48px 1fr;gap:6px;padding:7px 9px}.problem-dock>strong{grid-column:1/-1;padding:4px 8px;font-size:21px}.problem-dock p{font-size:9px}.problem-dock h2{font-size:18px}.problem-number{font-size:12px}.answer-stack,.answer-gate{width:160px}.answer-gate{min-height:59px}.answer-gate strong{font-size:22px}.answer-gate small{display:none}.raft-wrap{left:13%;width:150px}.race-message{left:7px;right:7px;bottom:18%;max-width:none;padding:6px 8px;font-size:9px}.controls{left:7px;right:7px;bottom:10%;justify-content:center}.controls button{flex:1;min-height:42px;padding:0 7px;font-size:13px}.controls .boost-button{min-width:135px;flex:1.4}.panel{top:49%;max-height:calc(100vh - 140px);padding:27px 19px}.panel h1{font-size:57px}.panel h2{font-size:38px}.finish-stats{grid-template-columns:1fr 1fr}.progress-bar{height:44px}}
@media(max-width:520px){.how-grid,.level-details{grid-template-columns:1fr}.meters>span:nth-child(1){display:none}.raft-wrap{left:11%;width:125px}.answer-stack,.answer-gate{width:135px}.answer-gate{min-height:54px}.answer-gate strong{font-size:19px}.progress-bar span{font-size:8px}}
@media(max-height:650px){.hud{height:62px}.course{inset:62px 0 42px}.progress-bar{height:42px}.panel{max-height:calc(100vh - 120px);padding-block:20px}.panel h1{font-size:54px}.panel h2{font-size:34px}.problem-dock{min-height:62px}.controls{bottom:12%}}
@media(prefers-reduced-motion:reduce){.water-lines,.boost-wake,.panel{animation:none}}