:root{color-scheme:dark;--bg:#121428;--ink:#f9f8ff;--muted:#b4b7d0;--mint:#42f8cb;--purple:#b08aff;--gold:#ffc568;--stroke:#454b72}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 20% 6%,#37325f 0,transparent 33%),radial-gradient(circle at 89% 36%,#1d4451 0,transparent 35%),var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;min-height:100vh}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}a{color:inherit} [hidden]{display:none!important}
.top.game-controls{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr) minmax(0,1fr);align-items:center;column-gap:8px;position:sticky;top:0;z-index:30;max-width:850px;width:100%;min-height:60px;margin:0 auto;padding:8px 14px;background:#292849;border-radius:0 0 14px 14px;border:1px solid #525178;box-shadow:0 5px 25px #0004}.game-control-back,.game-control-sound{display:inline-flex;justify-content:center;align-items:center;width:max-content;min-height:40px;padding:7px 11px;background:#181b35;border:2px solid #6e6d99;border-radius:10px;color:#fff;font-size:12px;font-weight:900;text-decoration:none;white-space:nowrap}.game-control-back{grid-column:1;justify-self:start}.game-control-title{grid-column:2;justify-self:center;font-size:14px;font-weight:1000;color:#fff2c5;text-align:center}.game-control-sound{grid-column:3;justify-self:end}.back-short{display:none}.game-control-back:focus-visible,.game-control-sound:focus-visible,button:focus-visible{outline:3px solid var(--mint);outline-offset:3px}
.wrap{max-width:1070px;margin:0 auto;padding:18px 15px 40px}.mast{text-align:center;margin:10px 0 20px}.eyebrow{margin:0;color:#8ee6db;font-size:12px;font-weight:900;letter-spacing:.17em}.mast h1{font-size:clamp(34px,6vw,54px);font-weight:1000;letter-spacing:-.06em;line-height:1.25;margin:8px 0 4px}.mast h1 span{color:var(--mint);text-shadow:4px 5px 0 #2e4860}.mast h1 em{font-size:.7em;font-style:normal}.lead{margin:9px auto 0;color:#e0dbf5;font-size:14px;font-weight:700}.game-layout{display:grid;grid-template-columns:minmax(0,1.36fr) minmax(280px,.87fr);align-items:start;gap:16px}.machine{position:relative;min-width:0;padding:14px;background:linear-gradient(145deg,#252544,#171d35);border:2px solid #56577e;border-radius:20px;box-shadow:8px 10px 0 #090b19,0 0 50px #3c278b21;overflow:visible}.machine-head{display:flex;align-items:center;justify-content:space-between;gap:8px}.pill{font-size:11px;font-weight:1000;color:#1c2339;background:var(--gold);border-radius:999px;padding:7px 11px}.round{color:#c8bef5;font-weight:1000;font-size:11px;letter-spacing:.08em}.time-track{height:8px;background:#11162a;border-radius:99px;overflow:hidden;margin:11px 0 10px}.time-fill{height:100%;width:100%;border-radius:99px;background:linear-gradient(90deg,#8ce9ff,var(--mint));box-shadow:0 0 10px var(--mint);transition:width .11s linear}.time-fill.low{background:#ff758a;box-shadow:0 0 10px #ff6576}.hud{display:grid;grid-template-columns:1.2fr 1.2fr .9fr;gap:7px}.hud>div{background:#10152b;border:1px solid #454968;border-radius:12px;padding:9px 8px 8px;text-align:center;min-width:0}.hud small{display:block;color:#9ba9c9;font-size:10px;font-weight:900;letter-spacing:.06em}.hud strong{display:block;font-weight:1000;font-variant-numeric:tabular-nums;font-size:clamp(21px,4.5vw,34px);line-height:1.28}.hud #score{color:#fef9ef}.hud #combo{color:#ffc968}.hud #timer{color:#68efd8}.hud i,.hud em{font-size:10px;font-style:normal}.instruction{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:12px 1px 9px;min-height:33px}.instruction>span{font-size:clamp(20px,5vw,30px);font-weight:1000;color:#fff0aa;letter-spacing:-.05em}.instruction small{font-size:12px;color:#b9bee0;font-weight:800;text-align:right}.board-shell{position:relative;isolation:isolate;width:min(100%,442px);aspect-ratio:1;margin:0 auto;border:3px solid #626392;border-radius:50%;background:radial-gradient(circle at 52% 44%,#252b4b,#111729 74%);box-shadow:inset 0 0 45px #0008,0 0 32px #646be42b;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;overflow:hidden;overscroll-behavior:contain}.board-shell svg{display:block;width:100%;height:100%;touch-action:none;user-select:none;-webkit-user-select:none}.board-shell.active{border-color:#72b9d8}.board-shell.win{animation:board-win .28s ease}.board-shell.miss{animation:board-miss .22s linear}.stage-overlay{position:absolute;inset:0;z-index:9;display:flex;align-items:center;justify-content:center;text-align:center;padding:24px;background:#0e1328e8;border-radius:50%;touch-action:manipulation}.overlay-content{width:100%;max-width:350px}.overlay-content .giant{font-size:clamp(32px,8vw,52px);display:block;line-height:1.2}.overlay-content h2{font-size:clamp(21px,4.2vw,29px);margin:8px 0 7px;font-weight:1000;color:#fff2bf}.overlay-content p{font-weight:750;color:#d1d7f3;font-size:12px;line-height:1.6;margin:5px 0 13px}.overlay-content small{display:block;color:#a9b6d1;font-weight:800;font-size:10px;margin-top:10px}.primary{border:2px solid #fbfdfb;border-radius:12px;padding:12px 18px;background:linear-gradient(180deg,#87ffd6,#3decbf);color:#13273c;font-size:clamp(13px,3.2vw,17px);font-weight:1000;box-shadow:0 5px 0 #168a81;touch-action:manipulation}.primary:active{transform:translateY(3px);box-shadow:0 2px 0 #168a81}.end-overlay{background:#0f142af5}.end-overlay .giant{font-size:32px}.end-overlay h2{margin:2px 0 4px;font-size:21px}.end-tag{color:#a2f1d7;font-size:11px;letter-spacing:.14em;font-weight:1000}.end-score{background:#1e2946;border:2px solid #6f6b9d;border-radius:14px;padding:5px;margin:8px auto;max-width:250px}.end-score small{display:block;font-size:10px;margin:0}.end-score strong{display:block;font-size:clamp(30px,7vw,43px);color:#ffc968;line-height:1.13;font-variant-numeric:tabular-nums}.end-detail{display:flex;justify-content:center;gap:14px;font-size:11px;color:#d6daec}.end-detail b{color:#fff}.end-overlay p{font-size:11px;margin:5px}.end-overlay .primary{padding:9px 15px}
.pop-message{position:absolute;top:31%;left:50%;transform:translate(-50%,-50%);pointer-events:none;z-index:5;color:#fff7c6;font-size:clamp(24px,7vw,41px);font-weight:1000;white-space:nowrap;text-shadow:0 3px #272045,0 0 22px #f4c65b;opacity:0}.pop-message.show{animation:pop .67s ease-out forwards}.pop-message.mistake{color:#ff9fba;text-shadow:0 2px #47223a}.burst{position:absolute;inset:0;pointer-events:none;overflow:hidden;border-radius:50%;z-index:4}.spark{position:absolute;top:50%;left:50%;width:8px;height:14px;background:var(--spark-color);border-radius:2px;animation:spark .53s ease-out forwards;transform:translate(-50%,-50%)}.bottom-row{display:flex;justify-content:space-between;align-items:center;gap:10px;min-height:35px;padding:10px 3px 0;font-weight:850;color:#e3e5fc;font-size:12px}.bottom-row>span:first-child{min-width:0}.bottom-row>span:last-child{flex-shrink:0;color:#8ef9de}.game-foot{font-size:11px;margin:7px 2px 1px;color:#aab3d0;text-align:center}
.sidebar{display:grid;gap:13px}.sidebox{border:2px solid #4a4e71;border-radius:18px;background:linear-gradient(130deg,#232544,#1c233e);padding:17px;box-shadow:5px 6px 0 #111427}.sidebox h3{margin:0 0 10px;font-weight:1000;font-size:18px;color:#fbe4a4}.sidebox ol{margin:0;padding-left:22px;color:#e3e4f1;line-height:1.8;font-weight:700;font-size:13px}.sidebox li{margin-bottom:7px}.sidebox li:last-child{margin-bottom:0}.sidebox b{color:#83f5d8}.best-line,.meta{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:10px 0;border-bottom:1px solid #3b4263;font-size:13px}.best-line strong{font-weight:1000;font-size:20px;color:#f4cf86}.subnote{font-size:11px;color:#a6b3d6;line-height:1.7;margin-bottom:0}.meta b{font-size:12px;color:#fff6d8;text-align:right}.meta:last-child,.best-line:last-of-type{border-bottom:0}footer{text-align:center;margin:22px 0 0;color:#939fbc;font-size:11px}
@keyframes pop{0%{opacity:0;transform:translate(-50%,-30%) scale(.55) rotate(-8deg)}20%,58%{opacity:1;transform:translate(-50%,-65%) scale(1.17) rotate(3deg)}100%{opacity:0;transform:translate(-50%,-100%) scale(.94)}}@keyframes spark{to{opacity:0;transform:translate(calc(-50% + var(--dx)),calc(-50% + var(--dy))) rotate(260deg)}}@keyframes board-win{50%{box-shadow:inset 0 0 50px #08d5bd99,0 0 35px #42f8cb88;transform:scale(1.017)}}@keyframes board-miss{30%{transform:translateX(-4px)}60%{transform:translateX(4px)}}
@media(max-width:730px){.game-layout{grid-template-columns:1fr}.machine{max-width:600px;margin:0 auto;width:100%}.sidebar{max-width:600px;margin:0 auto;width:100%}.wrap{padding:12px 12px 32px}.mast{margin:4px 0 15px}.mast h1{font-size:38px}.lead{font-size:12px}}@media(max-width:390px){.top.game-controls{column-gap:4px;padding:8px}.game-control-back,.game-control-sound{font-size:10px;min-height:36px;padding:5px 7px}.back-full{display:none}.back-short{display:inline}.game-control-title{font-size:12px}.wrap{padding:9px 9px 26px}.mast h1{font-size:32px}.machine{padding:9px;border-radius:16px}.hud strong{font-size:22px}.instruction{margin:8px 2px 5px}.instruction>span{font-size:20px}.instruction small{font-size:10px}.board-shell{max-width:370px}.stage-overlay{padding:14px}.overlay-content .giant{font-size:32px}.overlay-content h2{font-size:21px}.overlay-content p{font-size:11px;line-height:1.5}.sidebox{padding:15px}.bottom-row{font-size:11px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
/* v0.2: focused gameplay and records navigation */
body.game-in-progress .sidebar{display:none!important}
body.game-in-progress .game-layout{grid-template-columns:minmax(0,1fr)}
body.game-in-progress .machine{width:100%;max-width:620px;margin:0 auto}
.combo-strip{display:flex;align-items:center;gap:9px;min-height:26px;margin:7px 0 1px;padding:4px 5px 0;color:#c6d9e9;font-weight:900;font-size:11px}
.combo-strip #comboTier{white-space:nowrap;color:#b8e8df;min-width:57px}
.combo-strip #comboTier.boost{color:#ffe087;text-shadow:0 0 10px #ffc15460}
.combo-rail{background:#0d1429;border:1px solid #48516b;border-radius:20px;height:8px;min-width:25px;flex:1;overflow:hidden}
.combo-progress{height:100%;width:0;border-radius:20px;background:linear-gradient(90deg,#3bf2c8,#ffcb70);box-shadow:0 0 12px #78ffe5;transition:width .18s ease-out}
.combo-strip #comboNext{font-size:10px;white-space:nowrap;color:#abb6d3}
.score-fly{position:absolute;top:55%;left:50%;z-index:7;pointer-events:none;opacity:0;font-size:clamp(27px,6vw,43px);font-weight:1000;color:#ffda7e;text-shadow:0 3px 0 #704a2a,0 0 21px #ffc779;white-space:nowrap}
.score-fly.show{animation:score-fly .68s cubic-bezier(.16,.85,.37,1) forwards}
.combo-banner{position:absolute;left:50%;top:11%;z-index:8;transform:translateX(-50%);opacity:0;pointer-events:none;padding:7px 13px;border-radius:50px;border:2px solid #fff5ba;background:#c34438;color:white;font-size:clamp(14px,4vw,19px);font-weight:1000;white-space:nowrap;box-shadow:0 6px 0 #652733,0 0 24px #ffaa73}
.combo-banner.show{animation:combo-banner .9s ease-out forwards}
.result-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin:5px auto 2px;max-width:285px}
.result-actions button{border-radius:10px;line-height:1.2;min-height:42px;padding:6px 6px;font-size:11px;font-weight:1000}
.secondary{border:2px solid #a6afff;border-radius:12px;background:#303855;color:#f6f7ff;box-shadow:0 4px 0 #111833}
.secondary:active{transform:translateY(2px);box-shadow:0 2px 0 #111833}
.end-overlay .overlay-content{display:grid;gap:2px;max-width:360px}
.end-overlay .overlay-content .giant{font-size:24px;line-height:1}
.end-overlay .overlay-content h2{font-size:20px;line-height:1.15;margin:0}
.end-overlay .overlay-content .end-tag{font-size:10px}
.end-overlay .end-score{width:100%;max-width:260px;margin:3px auto;padding:4px}
.end-overlay .end-score strong{font-size:clamp(26px,6vw,35px)}
.end-overlay .end-detail{gap:10px;font-size:11px}
.end-overlay .overlay-content p{margin:3px 0;font-size:11px}
@keyframes score-fly{0%{opacity:0;transform:translate(-50%,-5%) scale(.56)}17%{opacity:1;transform:translate(-50%,-15%) scale(1.2)}70%{opacity:1;transform:translate(-50%,-75%) scale(1)}100%{opacity:0;transform:translate(-50%,-115%) scale(.84)}}
@keyframes combo-banner{0%{opacity:0;transform:translate(-50%,-25px) scale(.5) rotate(-7deg)}20%,68%{opacity:1;transform:translate(-50%,0) scale(1.08) rotate(2deg)}100%{opacity:0;transform:translate(-50%,-13px) scale(.96)}}
@media(max-width:390px){.combo-strip{gap:6px;font-size:10px}.combo-strip #comboNext{font-size:9px}.result-actions{gap:5px}.result-actions button{font-size:10px;padding:5px 3px;min-height:40px}}

/* v0.3: FEVER, last-ten urgency and enhanced responsive feedback */
.fever-status{display:flex;align-items:center;gap:8px;min-height:29px;margin:2px 3px 1px;padding:4px 8px;border-radius:9px;border:1px solid #454962;color:#a9b7d4;font-size:11px;font-weight:1000;background:#12172a}
.fever-status>span{white-space:nowrap;min-width:165px}.fever-rail{height:7px;background:#30304b;flex:1;border-radius:20px;overflow:hidden}.fever-rail>div{width:0;height:100%;background:linear-gradient(90deg,#ffe26a,#ff754b);border-radius:20px;box-shadow:0 0 10px #ffb75d}
.fever-status.active{color:#ffe08e;border-color:#ffc75e;background:#50321ee0;box-shadow:inset 0 0 14px #ffce5740;animation:fever-sheen 1.15s ease-in-out infinite alternate}
.board-shell.fever{border-color:#ffc659;box-shadow:inset 0 0 45px #0008,0 0 25px #ffae5777}
.pill.final-ten{background:#ff526d;color:#fff;animation:final-warn .75s ease-in-out infinite alternate}
.time-fill.low{background:linear-gradient(90deg,#ff2e70,#ffc65d)}
.board-shell.final-ten{outline:3px solid #ff687755;outline-offset:2px}
.last-ten-flash{position:absolute;z-index:8;left:50%;top:41%;transform:translate(-50%,-50%);color:#fff0a5;background:#892c46db;border:3px solid #ffe8ad;border-radius:15px;padding:6px 13px;font-size:clamp(19px,6vw,29px);font-weight:1000;white-space:nowrap;pointer-events:none;opacity:0;box-shadow:0 0 30px #ffb55688}
.last-ten-flash.show{animation:last-ten-pop .95s ease-out forwards}
.board-shell.fever #trail{stroke:#ffde79}
@keyframes fever-sheen{to{box-shadow:inset 0 0 20px #ffd65b8a,0 0 12px #ffc76070}}
@keyframes final-warn{to{background:#ffb553;color:#3e1624}}
@keyframes last-ten-pop{0%{opacity:0;transform:translate(-50%,-55%) scale(.5)}25%,70%{opacity:1;transform:translate(-50%,-50%) scale(1.08)}100%{opacity:0;transform:translate(-50%,-115%) scale(.93)}}
@media(max-width:390px){.fever-status{font-size:10px;gap:5px;padding:4px 6px}.fever-status>span{min-width:150px}}
@media(prefers-reduced-motion:reduce){.fever-status.active,.pill.final-ten{animation:none}}

/* v0.4: calibrated difficulty without distracting new UI. */
@media(max-width:350px){.instruction small{max-width:100%;line-height:1.35}.fever-status>span{min-width:135px}.combo-strip #comboNext{font-size:8px}}

/* v0.5: keep CPU and animations low when device requests less motion. */
@media(prefers-reduced-motion:reduce){
 .time-fill,.board-shell.win,.board-shell.miss,.score-fly.show,.combo-banner.show,.last-ten-flash.show,.pop-message.show,.spark{animation:none!important;transition:none!important}
 .pop-message.show,.score-fly.show,.combo-banner.show,.last-ten-flash.show{opacity:1}
}