@font-face{font-family:Tetra Sans;src:url('assets/fonts/sans.ttf') format('truetype');font-style:normal;font-weight:400;font-display:swap}
@font-face{font-family:Tetra Sans;src:url('assets/fonts/sans-bold.ttf') format('truetype');font-style:normal;font-weight:700;font-display:swap}

:root{color-scheme:dark;--bg:#111116;--panel:#1b1b23;--border:#2b2b36;--text:#f0eff6;--muted:#93929f;--quiet:#666572;--purple:#b3a0ff;--purple-bright:#ab94ff;--green:#9bd4b5;--board-width:300px;font-family:'Tetra Sans',sans-serif;font-synthesis:none}
*{box-sizing:border-box}
body{margin:0;min-width:320px;background:radial-gradient(ellipse at 52% 38%,#25203544 0%,transparent 48%),var(--bg);color:var(--text);font-size:13px;-webkit-font-smoothing:antialiased}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
button:disabled{cursor:default}
button,a,canvas{outline-offset:5px}
button:focus-visible,a:focus-visible,canvas:focus-visible{outline:2px solid var(--purple)}
a{color:inherit;text-decoration:none}
button:not(:disabled){transition:background .18s,color .18s,border-color .18s,transform .18s,box-shadow .18s}
button:not(:disabled):active{transform:translateY(1px)}
.icon-definitions{position:absolute;width:0;height:0;overflow:hidden}
.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.muted{color:var(--quiet)}
.site-header{border-bottom:1px solid #ffffff0b;background:#11111699}
.header-inner{height:82px;max-width:1140px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px}
.brand{display:flex;align-items:center;gap:12px;font-size:30px;font-weight:700;letter-spacing:-1.5px}
.brand-dot{color:var(--purple)}
.brand-mark{width:32px;height:30px;display:grid;grid-template-columns:repeat(3,9px);grid-template-rows:repeat(2,9px);gap:2px;transform:rotate(-6deg);align-content:center}
.brand-mark i{background:var(--purple);border-radius:2px;box-shadow:0 0 16px #b3a0ff16}
.brand-mark i:last-child{grid-column:2}
.main-nav{display:flex;align-items:center;gap:8px;margin-left:67px}
.nav-item{display:flex;align-items:center;justify-content:center;gap:9px;height:38px;padding:0 17px;border-radius:8px;color:var(--muted);font-size:12px}
.nav-item.active{color:var(--purple);background:#b3a0ff0c}
.nav-item:hover{background:#ffffff06;color:var(--text)}
.nav-item .icon{width:15px;height:15px;color:#6f6d7d}
.nav-dot{width:5px;height:5px;border-radius:50%;background:var(--purple)}
.header-actions{display:flex;align-items:center;gap:21px}
.offline-badge{display:flex;align-items:center;gap:7px;font-size:10px;letter-spacing:.2px;color:var(--muted)}
.offline-badge>span{width:5px;height:5px;background:var(--green);border-radius:50%;box-shadow:0 0 7px #9bd4b520}
.icon-button{display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--border);border-radius:9px;color:var(--muted);background:#ffffff02}
.icon-button:hover{color:var(--text);background:#ffffff06;border-color:#494553}
.icon-button[aria-pressed=true]{color:var(--purple);border-color:#b3a0ff40}
.icon-button .icon{width:17px;height:17px}
.main-content{max-width:1092px;margin:0 auto;padding:0 24px}
.intro{display:flex;align-items:center;justify-content:space-between;margin:34px 0 33px}
.eyebrow{font-size:9px;letter-spacing:2.1px;color:var(--purple);display:flex;align-items:center;gap:9px;margin-bottom:13px}
.tiny-blocks{width:16px;height:13px;display:grid;grid-template-columns:repeat(2,5px);grid-template-rows:repeat(2,5px);gap:2px}
.tiny-blocks i{background:var(--purple);border-radius:1px}
.tiny-blocks i:last-child{grid-column:2}
h1{margin:0;font-size:34px;font-weight:700;letter-spacing:-1.65px;line-height:1.35}
h1>span{color:var(--purple)}
.intro p{font-size:12px;color:var(--muted);margin:10px 0 0;letter-spacing:.1px}
.intro-note{display:flex;align-items:center;gap:14px;font-size:11px;line-height:1.9;color:#84818f;padding-right:3px;margin-top:14px}
.intro-note>.icon{width:27px;height:27px;color:#8b79b1;stroke-width:1}
.mobile-mode-row{display:none}
.game-layout{display:grid;grid-template-columns:240px 328px 240px;gap:30px;justify-content:center;align-items:start}
.left-column,.right-column{display:flex;flex-direction:column;gap:16px}
.column-label{height:18px;display:flex;align-items:center;gap:13px;font-size:9px;color:var(--quiet);letter-spacing:1.5px;margin-bottom:0}
.label-line{height:1px;flex:1;background:#ffffff07}
.panel{border:1px solid var(--border);border-radius:13px;background:linear-gradient(135deg,#ffffff02,transparent 70%),var(--panel);padding:20px}
.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:8px}
.panel h2,.panel-title{font-size:12px;margin:0;font-weight:400;color:#c6c4d0}
.small-chip{font-size:9px;color:#9991b3;background:#b3a0ff0a;border:1px solid #b3a0ff13;border-radius:4px;padding:4px 6px}
.score-panel{padding:21px 20px 0;overflow:hidden}
.score-value{font-size:36px;line-height:1.2;letter-spacing:-1px;font-weight:700;margin-top:19px;font-variant-numeric:tabular-nums;color:#f0edf9}
.score-caption{color:var(--quiet);font-size:9px;margin-top:7px;white-space:nowrap}
.record-row{border-top:1px solid #ffffff07;margin:23px -20px 0;padding:15px 20px;display:flex;justify-content:space-between;align-items:center;gap:10px;background:#ffffff01}
.record-row>span{display:flex;gap:7px;align-items:center;color:var(--muted);font-size:10px}
.record-row .icon{color:#9988b9;width:14px;height:14px}
.record-row strong{font-size:11px;font-weight:400;color:#b8abc8;font-variant-numeric:tabular-nums}
.progress-panel{padding:18px 20px}
.stat-row{display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:11px}
.level-value{display:grid;place-items:center;width:34px;height:30px;background:#b3a0ff12;border:1px solid #b3a0ff19;color:var(--purple);border-radius:6px;font-size:15px;font-weight:400;font-variant-numeric:tabular-nums}
.lines-row{margin:19px 0 13px}
.lines-row strong{color:var(--text);font-size:15px;font-weight:400;font-variant-numeric:tabular-nums}
.stat-divider{font-size:11px;color:var(--quiet);margin-left:5px}
.progress-track{height:4px;border-radius:3px;overflow:hidden;background:#ffffff07}
.progress-track>span{display:block;height:100%;width:0%;border-radius:3px;background:var(--purple);box-shadow:0 0 9px #b3a0ff30;transition:width .2s}
.progress-caption{color:var(--quiet);font-size:9px;margin:10px 0 0}
.timer-row{display:flex;align-items:center;justify-content:space-between;margin-top:17px;padding-top:14px;border-top:1px solid #ffffff07;font-size:10px;color:var(--muted)}
.timer-row>span{display:flex;gap:5px;align-items:center}
.timer-row .icon{width:12px;height:12px}
.timer-row strong{font-weight:400;font-size:12px;color:var(--text);font-variant-numeric:tabular-nums}
.hold-panel{display:block;text-align:left;width:100%;padding:18px 20px 15px}
.hold-panel:hover{border-color:#b3a0ff45;background-color:#21202b}
.hold-panel.unavailable{opacity:.55}
kbd{font-family:inherit;display:inline-flex;justify-content:center;align-items:center;min-width:23px;height:23px;border-radius:5px;background:#ffffff04;border:1px solid #ffffff0c;box-shadow:0 2px 0 #00000016;color:#aaa6b8;font-size:10px;font-weight:400}
.hold-panel kbd{height:21px;min-width:21px;font-size:9px}
.hold-preview-wrap{position:relative;display:block;height:57px;margin:6px 0 2px}
.hold-preview-wrap canvas{display:block;width:180px;max-width:100%;height:72px;position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}
.hold-placeholder{display:grid;grid-template-columns:repeat(3,17px);grid-template-rows:repeat(2,17px);gap:3px;position:absolute;left:50%;top:50%;transform:translate(-50%,-50%)}
.hold-placeholder i{border:1px dashed #51465f;background:#b3a0ff04;border-radius:3px}
.hold-placeholder i:last-child{grid-column:2}
.hold-caption{display:block;text-align:center;font-size:9px;color:var(--quiet)}
.secondary-button{display:flex;align-items:center;justify-content:center;gap:9px;height:43px;border-radius:9px;border:1px solid var(--border);color:#aaa6b8;background:#ffffff02;font-size:11px}
.secondary-button:hover{border-color:#61586f;color:var(--text);background:#ffffff05}
.restart-button{margin-top:1px;position:relative}
.restart-button>.icon{width:14px;height:14px}
.shortcut-label{position:absolute;right:15px;color:var(--quiet);font-size:9px;border:1px solid #ffffff09;border-radius:4px;padding:2px 5px}
.board-topline{height:18px;display:flex;align-items:center;justify-content:space-between;margin:0 3px 16px}
.board-mode{font-size:9px;color:#888491;letter-spacing:1.5px}
.game-status{display:flex;gap:6px;align-items:center;color:#aaa5b5;font-size:9px}
.game-status>i{width:5px;height:5px;background:var(--green);border-radius:50%}
.game-status.paused>i{background:#e6bf7e}
.game-status.over>i{background:#e892aa}
.board-frame{position:relative;padding:13px;width:328px;background:#1a1823;border:1px solid #3d354e;border-radius:15px;box-shadow:0 12px 50px #00000029,0 0 35px #7e5fa00b;overflow:hidden;isolation:isolate}
.board-frame:before{content:'';position:absolute;left:15%;right:15%;top:0;height:1px;background:linear-gradient(90deg,transparent,#b3a0ff44,transparent);z-index:4;pointer-events:none}
#board{display:block;width:var(--board-width);height:calc(var(--board-width)*2);background:#121118;border:1px solid #ffffff03;border-radius:4px;touch-action:none;outline-offset:3px}
.board-overlay{position:absolute;inset:14px;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(180deg,#12111810 0%,#121118b3 21%,#121118df 40%,#121118d6 55%,#12111845 80%,#12111800 100%);border-radius:4px;z-index:2;padding:20px 19px 70px;transition:opacity .2s}
.board-overlay[hidden]{display:none}
.overlay-content{width:100%}
.start-symbol{display:grid;grid-template-columns:repeat(3,16px);grid-template-rows:repeat(2,16px);gap:3px;width:max-content;margin:0 auto 22px;transform:rotate(-8deg);filter:drop-shadow(0 0 13px #b3a0ff20)}
.start-symbol i{border-radius:3px;background:linear-gradient(145deg,#c2b1ff,#9d85e5);border:1px solid #ddd3ff42}
.start-symbol i:last-child{grid-column:2}
.overlay-eyebrow{font-size:8px;letter-spacing:2px;color:#a797c3;margin:0 0 12px}
.overlay-content h2{font-size:30px;line-height:1.22;letter-spacing:-1px;margin:0;color:#f4f0ff;font-weight:700}
.overlay-description{font-size:10px;line-height:1.85;color:#9f98ad;margin:14px 0 24px}
.primary-button{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;height:44px;border:1px solid #d3c3ff5e;background:#b3a0ff;color:#211732;border-radius:8px;font-size:11px;font-weight:700;box-shadow:0 4px 20px #a18af51a}
.primary-button:hover{background:#c1b1ff;box-shadow:0 4px 24px #a18af535;border-color:#e6dcff80}
.primary-button .icon{width:17px;height:17px}
.start-hint{display:flex;align-items:center;justify-content:center;gap:7px;color:#71697f;font-size:9px;margin-top:13px}
.start-hint kbd{min-width:35px;height:18px;font-size:8px;background:#ffffff02;border-color:#ffffff08;color:#8a809b}
.board-toast{position:absolute;left:50%;top:53%;transform:translate(-50%,8px);opacity:0;pointer-events:none;z-index:3;text-align:center;white-space:nowrap;background:#292033df;border:1px solid #b3a0ff40;padding:11px 20px;border-radius:9px;box-shadow:0 4px 30px #00000040;transition:opacity .15s,transform .15s;font-size:16px;font-weight:700;color:#d7c6ff}
.board-toast.show{opacity:1;transform:translate(-50%,0)}
.board-toast small{display:block;font-size:10px;font-weight:400;color:#c5b3df;margin-top:5px}
.board-bottomline{display:flex;align-items:center;justify-content:space-between;margin:14px 3px 0;color:#6c657b;font-size:9px}
.board-bottomline>span{display:flex;align-items:center;gap:7px}
.ghost-example{width:9px;height:9px;display:inline-block;border:1px solid #a792d270;border-radius:2px}
.pause-button{display:flex;align-items:center;gap:5px;font-size:9px;padding:2px 0;color:#a69cb9}
.pause-button:disabled{color:#5c546a}
.pause-button .icon{width:12px;height:12px}
.pause-button kbd{width:17px;min-width:17px;height:17px;font-size:8px;margin-left:2px}
.pause-button:disabled kbd{color:#5c546a}
.next-panel{padding:20px 17px 15px}
.next-panel .panel-heading{padding:0 3px 17px}
.next-dots{display:flex;gap:3px}
.next-dots i{width:3px;height:3px;background:#625973;border-radius:50%}
.next-dots i:first-child{background:var(--purple)}
.next-list{display:flex;flex-direction:column;gap:8px}
.next-piece{display:flex;align-items:center;justify-content:center;position:relative;height:73px;border-radius:7px;background:#11111760;border:1px solid #ffffff03}
.next-piece.first{background:#b3a0ff05;border:1px solid #b3a0ff14}
.next-piece canvas{width:150px;height:70px;display:block}
.piece-number{position:absolute;left:10px;top:11px;font-size:8px;color:#514c5d;font-variant-numeric:tabular-nums}
.first .piece-number{color:#8d7aa9}
.next-marker{position:absolute;right:9px;top:30px;color:#7c689e;font-size:12px}
.mode-panel{padding:19px 17px 17px}
.mode-panel .panel-heading{padding:0 3px}
.mode-panel .panel-heading>.icon{width:14px;height:14px}
.mode-switch{display:flex;background:#111116;border:1px solid #ffffff04;border-radius:8px;padding:4px;margin-top:17px;gap:3px}
.mode-switch button{flex:1;border:1px solid transparent;font-size:10px;padding:8px 3px;border-radius:5px;color:#777280;white-space:nowrap;display:flex;justify-content:center;gap:5px;align-items:center}
.mode-switch button:hover{color:#ddd2f2;background:#ffffff04}
.mode-switch button.selected{background:#30273e;color:#d4c4f5;border-color:#b3a0ff1f;box-shadow:0 1px 4px #00000015}
.mode-switch button>span{font-size:7px;border:1px solid #77728038;border-radius:3px;padding:0 2px;line-height:11px}
.mode-panel>p{font-size:10px;color:#85808f;line-height:1.8;margin:13px 3px 0}
.little-tip{display:flex;align-items:flex-start;gap:12px;padding:6px 3px 0}
.tip-icon{display:grid;place-items:center;width:30px;height:30px;background:#b3a0ff08;border:1px solid #b3a0ff0a;border-radius:8px;color:#9b82bf;flex-shrink:0}
.tip-icon>.icon{width:16px;height:16px;stroke-width:1.25}
.little-tip h3{font-size:10px;font-weight:400;color:#b4aabb;margin:1px 0 7px}
.little-tip p{font-size:10px;line-height:1.8;color:#77717f;margin:0}
.session-note{display:flex;align-items:center;gap:6px;font-size:8px;color:#5e5869;padding:4px 3px 0}
.session-dot{width:4px;height:4px;background:#61566e;border-radius:50%}
.keyboard-guide{display:flex;align-items:center;justify-content:space-between;gap:18px;border:1px solid #ffffff07;background:#ffffff02;border-radius:10px;padding:18px 23px;margin:29px auto 0;max-width:868px;color:#88828f}
.keyboard-guide>div{display:flex;align-items:center;gap:8px;font-size:10px;white-space:nowrap}
.keyboard-guide .guide-heading{color:#a29aa9;font-size:10px;gap:9px;padding-right:9px}
.keyboard-icon{width:20px;height:20px;fill:none;stroke:#81758e;stroke-width:1.5;stroke-linecap:round}
.keyboard-guide kbd{width:23px;height:22px;color:#b0a4c1;font-size:10px;background:#ffffff02;border-color:#ffffff09}
.key-pair{display:flex;gap:3px}
.keyboard-guide .space-key,.space-key{width:auto;min-width:57px;padding:0 6px;font-size:9px}
.touch-controls{display:none}
.site-footer{max-width:1092px;margin:27px auto 0;padding:19px 24px 22px;border-top:1px solid #ffffff07;display:flex;align-items:center;justify-content:space-between;color:#625b6d;font-size:9px}
.footer-right{display:flex;align-items:center;gap:10px}
.footer-block{display:block;width:7px;height:7px;border-radius:1px;background:#b3a0ff70;box-shadow:5px -5px 0 #b3a0ff30}
.modal{background:linear-gradient(145deg,#24212e,#19171f);border:1px solid #53445f;border-radius:18px;padding:34px;color:var(--text);box-shadow:0 24px 100px #00000070;width:min(510px,calc(100% - 32px));max-height:calc(100vh - 40px)}
.modal::backdrop{background:#0c0a128a;backdrop-filter:blur(7px)}
.modal-close{position:absolute;right:17px;top:17px;border:0;background:#ffffff04;color:#a99bb8}
.modal-eyebrow{font-size:8px;letter-spacing:1.5px;color:#ac95ce;margin:6px 0 15px;padding-right:20px}
.modal h2{font-size:28px;letter-spacing:-1px;line-height:1.25;margin:0}
.modal h2>span{color:var(--purple)}
.modal-intro{font-size:11px;line-height:1.9;color:#a39aaf;margin:16px 0 22px}
.help-controls{display:flex;flex-direction:column;gap:10px;padding:17px 0;border-top:1px solid #ffffff09;border-bottom:1px solid #ffffff09}
.help-controls>div{display:flex;align-items:center;font-size:10px;color:#c1b6d0;gap:15px}
.help-controls>div>span:first-child{width:89px;flex-shrink:0}
.help-controls kbd{background:#ffffff04}
.scoring-guide{display:flex;margin:20px 0;gap:8px}
.scoring-guide>span{flex:1;border:1px solid #b3a0ff16;background:#b3a0ff05;padding:10px 3px;border-radius:8px;display:flex;flex-direction:column;align-items:center;color:#8f829f;gap:7px;font-size:9px}
.scoring-guide strong{font-size:16px;font-weight:400;color:#c6b3e9}
.help-footnote{font-size:10px;line-height:1.8;color:#8e829e;margin:0 0 24px}
.help-modal>.primary-button{width:100%}
.confirm-modal{width:min(410px,calc(100% - 32px));padding:31px}
.confirm-modal>p{font-size:11px;color:#a39aaf;line-height:1.8;margin:16px 0 26px}
.confirm-actions{display:flex;gap:10px}
.confirm-actions>button{width:50%}
.result-stats{margin:0 0 23px;padding:12px 0;border-top:1px solid #b3a0ff1a;border-bottom:1px solid #b3a0ff1a;font-size:9px;line-height:1.7;color:#a798ba}
.result-stats strong{display:block;font-size:25px;font-weight:700;color:#d4c3f1;letter-spacing:-1px}
.result-stats small{display:block;margin-top:4px;color:#83708f;font-size:9px}
body[data-game-state=over] .board-overlay,body[data-game-state=won] .board-overlay{padding-bottom:22px}
body[data-game-state=over] .start-symbol,body[data-game-state=won] .start-symbol{display:none}
body[data-game-state=over] .overlay-description,body[data-game-state=won] .overlay-description{margin:13px 0 17px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
[hidden]{display:none!important}

@media(min-width:1400px){.header-inner{max-width:1200px}.main-content,.site-footer{max-width:1120px}.intro{margin-top:39px;margin-bottom:36px}.game-layout{grid-template-columns:252px 328px 252px;gap:36px}.keyboard-guide{max-width:904px}}
@media(max-width:1000px){.game-layout{grid-template-columns:215px 308px 215px;gap:20px}:root{--board-width:280px}.board-frame{width:308px}.panel{padding-left:17px;padding-right:17px}.record-row{margin-left:-17px;margin-right:-17px;padding-left:17px;padding-right:17px}.score-value{font-size:33px}.intro-note{display:none}h1{font-size:32px}.keyboard-guide{gap:12px;padding:17px}.keyboard-guide .guide-heading{display:none}.next-piece{height:67px}.next-piece canvas{width:145px;height:67px}.next-marker{right:6px}.session-note{font-size:7px}.little-tip{gap:10px}.little-tip p{font-size:9px}.small-chip{font-size:8px}}
@media(max-width:820px){.header-inner{height:70px}.main-nav{margin-left:0}.offline-badge{display:none}.header-actions{gap:0}.main-content{max-width:750px;padding:0 20px}.intro{margin:25px 0 26px}h1{font-size:29px;letter-spacing:-1.2px}.intro p{font-size:11px}.game-layout{grid-template-columns:174px 288px 174px;gap:15px}:root{--board-width:260px}.board-frame{width:288px}.panel{padding:16px 13px}.panel h2,.panel-title{font-size:11px}.left-column,.right-column{gap:13px}.column-label{font-size:8px;letter-spacing:1px}.score-panel{padding-bottom:0}.score-value{font-size:29px;margin-top:19px}.score-caption{font-size:7px}.record-row{margin:22px -13px 0;padding:14px 13px;gap:3px}.record-row>span{font-size:8px;gap:4px}.record-row strong{font-size:9px}.record-row .icon{width:12px;height:12px}.small-chip{font-size:7px;padding:3px 4px}.progress-caption{font-size:7px}.progress-panel{padding-top:17px;padding-bottom:17px}.lines-row{margin-top:22px}.hold-panel{padding-top:17px;padding-bottom:17px}.hold-caption{font-size:8px}.next-panel{padding:16px 12px 13px}.next-panel .panel-heading{padding-bottom:17px}.next-piece{height:66px}.next-piece canvas{width:128px;height:60px}.next-marker{display:none}.piece-number{left:7px;top:7px;font-size:7px}.mode-panel{padding:18px 12px 15px}.mode-switch{padding:3px}.mode-switch button{font-size:8px;padding:8px 2px}.mode-switch button>span{font-size:6px}.mode-panel>p{font-size:8px;line-height:1.95}.little-tip{gap:8px;padding-left:0}.tip-icon{width:24px;height:24px;border-radius:6px}.tip-icon>.icon{width:13px;height:13px}.little-tip h3{font-size:8px}.little-tip p{font-size:8px;line-height:1.9}.session-note{font-size:6px;gap:4px}.board-topline{font-size:8px}.board-mode{font-size:8px}.game-status{font-size:8px}.board-bottomline{font-size:8px}.keyboard-guide{margin-top:25px}.keyboard-guide>div{font-size:9px;gap:6px}.overlay-content h2{font-size:27px}.overlay-description{font-size:9px}.overlay-eyebrow{font-size:7px}}
@media(max-width:720px){.header-inner{padding:0 18px;height:64px}.brand{font-size:25px;gap:8px}.brand-mark{transform:scale(.85) rotate(-6deg);width:28px}.main-nav{gap:2px}.nav-item{height:33px;padding:0 11px;font-size:10px}.nav-item .icon{display:none}.sound-button{width:32px;height:32px}.main-content{padding:0 18px;max-width:560px}.intro{margin:24px 0 23px}.eyebrow{font-size:8px;letter-spacing:1.65px;margin-bottom:10px}h1{font-size:25px;letter-spacing:-1.25px}.intro p{font-size:10px;margin-top:8px}.game-layout{grid-template-columns:minmax(0,1fr) 144px;gap:13px;align-items:start}.board-column{grid-column:1;grid-row:1 / 3;width:100%}.right-column{grid-column:2;grid-row:2;gap:12px}.left-column{grid-column:2;grid-row:1;gap:12px}.column-label{display:none}:root{--board-width:100%}.board-frame{padding:9px;width:100%}#board{width:100%;height:auto;aspect-ratio:1 / 2}.board-overlay{inset:10px;padding:16px 12px 50px}.board-topline{margin:0 1px 12px;height:16px}.board-mode{font-size:7px;letter-spacing:1px}.game-status{font-size:7px;gap:4px}.board-bottomline{margin:11px 1px 0}.board-bottomline>span{display:none}.pause-button{margin:auto;font-size:9px}.left-column{padding-top:28px}.panel{border-radius:10px}.score-panel{padding:13px 11px 0}.small-chip{display:none}.score-value{font-size:25px;margin-top:15px;letter-spacing:-1px}.score-caption{display:none}.record-row{margin:17px -11px 0;padding:11px;flex-wrap:wrap;gap:7px}.record-row>span{font-size:8px}.record-row strong{font-size:10px}.progress-panel{padding:13px 11px}.stat-row{font-size:9px}.level-value{width:28px;height:26px;font-size:13px}.lines-row{margin:15px 0 11px}.lines-row strong{font-size:13px}.stat-divider{font-size:9px}.progress-caption{font-size:7px;line-height:1.5}.hold-panel{padding:12px 11px 11px}.hold-preview-wrap{height:43px;margin:1px 0 2px}.hold-preview-wrap canvas{width:125px;height:50px}.hold-placeholder{transform:translate(-50%,-50%) scale(.8)}.hold-caption{font-size:7px}.hold-panel kbd{height:18px;min-width:18px;font-size:8px}.restart-button{height:34px;margin:0;font-size:9px;gap:5px}.restart-button .icon{width:12px;height:12px}.shortcut-label{display:none}.right-column{margin-top:0}.next-panel{padding:13px 10px 10px}.next-panel .panel-heading{padding-bottom:10px}.next-piece{height:48px;border-radius:5px}.next-list{gap:5px}.next-piece canvas{width:107px;height:50px}.piece-number{font-size:6px;left:5px;top:5px}.mode-panel{padding:12px 8px}.mode-panel .panel-heading{padding:0 3px}.mode-panel .panel-heading .icon{display:none}.mode-switch{margin-top:10px;border-radius:6px;padding:2px;gap:1px}.mode-switch button{font-size:7px;gap:3px;padding:7px 1px;border-radius:4px}.mode-switch button>span{display:none}.mode-panel>p{font-size:7px;line-height:1.8;margin:9px 3px 0}.little-tip,.session-note{display:none}.keyboard-guide{display:none}.touch-controls{display:flex;gap:8px;margin:20px 0 0}.touch-controls>button{height:47px;flex:1;display:grid;place-items:center;background:#1e1b27;border:1px solid #3c324a;border-radius:9px;color:#b2a2c9;touch-action:none;user-select:none}.touch-controls>button:active,.touch-controls>button.pressed{background:#443351;color:#e2d1ff;border-color:#9277b1}.touch-controls>button.drop-control{background:#aa95f2;color:#21172f;border-color:#cdbafa}.touch-controls .icon{width:19px;height:19px}.site-footer{margin-top:24px;padding:18px;font-size:8px;max-width:560px}.footer-right{font-size:7px;gap:7px}.timer-row{font-size:8px;margin-top:11px;padding-top:11px}.timer-row strong{font-size:9px}.timer-row .icon{width:10px;height:10px}.start-symbol{grid-template-columns:repeat(3,13px);grid-template-rows:repeat(2,13px);gap:2px;margin-bottom:17px}.overlay-content h2{font-size:26px}.overlay-eyebrow{font-size:7px;letter-spacing:1.4px}.overlay-description{font-size:9px;margin:13px 0 20px}.primary-button{height:39px;font-size:10px}.start-hint{font-size:8px;margin-top:11px}}
@media(max-width:430px){.main-content{padding:0 14px}.header-inner{padding:0 14px}.game-layout{grid-template-columns:minmax(0,1fr) 122px;gap:10px}h1{font-size:22px;letter-spacing:-1.2px}.intro p{font-size:9px}.nav-item{padding:0 8px;font-size:9px}.brand{font-size:23px}.brand-mark{width:25px}.main-nav{gap:0}.score-value{font-size:22px}.panel h2,.panel-title{font-size:10px}.record-row>span{font-size:7px}.record-row strong{font-size:9px}.record-row{gap:5px}.score-panel{padding-top:11px}.score-value{margin-top:12px}.progress-panel{padding:11px}.level-value{height:23px;width:26px;font-size:12px}.lines-row{margin-top:12px}.hold-panel{padding-top:10px;padding-bottom:10px}.hold-caption{font-size:6px}.hold-preview-wrap{height:35px}.left-column,.right-column{gap:10px}.right-column{margin-top:0}.next-panel{padding:11px 8px 8px}.next-piece{height:42px}.next-piece canvas{width:98px;height:46px}.mode-panel{padding:10px 6px}.mode-switch button{font-size:6.5px}.mode-panel>p{font-size:6.5px}.board-frame{padding:7px;border-radius:11px}.board-overlay{inset:8px;padding:14px 10px 38px}.overlay-content h2{font-size:23px}.overlay-eyebrow{font-size:6px;letter-spacing:1.2px}.overlay-description{font-size:8px;margin:11px 0 15px}.start-symbol{margin-bottom:14px;grid-template-columns:repeat(3,11px);grid-template-rows:repeat(2,11px)}.primary-button{font-size:9px;gap:4px;height:35px}.primary-button .icon{width:14px;height:14px}.start-hint{font-size:7px;gap:4px}.start-hint kbd{height:16px;min-width:30px;font-size:7px}.game-status{font-size:6px}.board-mode{font-size:6px}.board-topline{margin-bottom:12px}.board-toast{font-size:13px;padding:9px 12px}.board-toast small{font-size:8px}.touch-controls{gap:6px;margin-top:17px}.touch-controls>button{height:43px;border-radius:7px}.touch-controls .icon{width:17px;height:17px}.site-footer{font-size:7px;padding-left:14px;padding-right:14px}.footer-right{font-size:6px}.result-stats{margin-bottom:13px;padding:8px 0;font-size:7px}.result-stats strong{font-size:21px}.result-stats small{font-size:7px}.modal{padding:25px}.modal h2{font-size:24px}.modal-eyebrow{font-size:7px}.help-controls>div{font-size:9px;gap:8px}.help-controls>div>span:first-child{width:83px}.help-footnote{font-size:9px}.modal-close{right:12px;top:12px;width:29px;height:29px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* Keep the whole playing field within a laptop-height viewport. */
@media(min-width:721px) and (max-height:980px){
  :root{--board-width:clamp(230px,calc((100vh - 385px)/2),280px)}
  .header-inner{height:68px}
  .intro{margin-top:24px;margin-bottom:24px}
  .eyebrow{margin-bottom:10px}
  h1{font-size:30px}
  .intro p{margin-top:8px;font-size:11px}
  .game-layout{grid-template-columns:minmax(174px,240px) calc(var(--board-width) + 28px) minmax(174px,240px);gap:25px}
  .board-frame{width:calc(var(--board-width) + 28px)}
  .little-tip,.session-note{display:none}
  .keyboard-guide{margin-top:21px;padding-top:13px;padding-bottom:13px;max-width:calc(530px + var(--board-width))}
  .site-footer{margin-top:22px;padding-top:16px;padding-bottom:18px}
}
@media(min-width:721px) and (max-width:820px) and (max-height:980px){
  .game-layout{grid-template-columns:174px calc(var(--board-width) + 28px) 174px;gap:15px}
  h1{font-size:29px}
}
@media(min-width:721px) and (max-height:820px){
  .intro{margin-top:19px;margin-bottom:21px}
  .left-column,.right-column{gap:13px}
  .board-topline{margin-bottom:13px}
  .score-panel{padding-top:18px}
  .score-value{font-size:32px;margin-top:14px}
  .record-row{margin-top:16px;padding-top:12px;padding-bottom:12px}
  .progress-panel{padding-top:16px;padding-bottom:16px}
  .lines-row{margin-top:15px}
  .hold-panel{padding-top:14px;padding-bottom:14px}
  .hold-preview-wrap{height:43px}
  .restart-button{height:37px}
  .next-panel .panel-heading{padding-bottom:13px}
  .next-piece{height:65px}
}

/* On a phone, the essentials form one compact rail beside the board. */
@media(max-width:720px){
  .main-content{max-width:480px}
  .intro{margin-bottom:16px}
  .mobile-mode-row{display:flex;justify-content:space-between;align-items:center;margin:0 0 19px}
  .mobile-mode-row>span{font-size:7px;letter-spacing:1.25px;color:#71667e}
  .mobile-mode-row .mode-switch{margin:0;width:180px;padding:3px;border-radius:7px}
  .mobile-mode-row .mode-switch button{font-size:8px;padding:6px 3px;border-radius:4px}
  .mobile-mode-row .mode-switch button>span{display:inline;font-size:6px}
  .game-layout{grid-template-columns:minmax(0,1fr) 122px;grid-template-rows:repeat(5,auto);gap:9px 10px}
  .left-column,.right-column{display:contents}
  .board-column{grid-column:1;grid-row:1 / 6}
  .score-panel{grid-column:2;grid-row:1;margin-top:28px;padding:11px 10px 0;align-self:start}
  .score-value{font-size:21px;margin-top:9px}
  .record-row{margin:11px -10px 0;padding:9px 10px;gap:3px;flex-wrap:nowrap}
  .record-row>span{font-size:6px;gap:3px;white-space:nowrap}
  .record-row .icon{width:10px;height:10px}
  .record-row strong{font-size:8px}
  .progress-panel{grid-column:2;grid-row:2;padding:11px 10px;align-self:start}
  .stat-row{font-size:8px}
  .level-value{height:22px;width:25px;font-size:12px}
  .lines-row{margin:11px 0 9px}
  .lines-row strong{font-size:12px}
  .stat-divider{font-size:8px}
  .progress-caption{font-size:6.5px;margin-top:7px;line-height:1.5}
  .next-panel{grid-column:2;grid-row:3;padding:11px 8px 8px;align-self:start}
  .next-panel .panel-heading{padding-bottom:8px}
  .next-piece{height:38px}
  .next-piece:not(:first-child){display:none}
  .next-piece canvas{width:102px;height:48px}
  .hold-panel{grid-column:2;grid-row:4;padding:10px 10px 9px;align-self:start}
  .hold-preview-wrap{height:33px;margin:0}
  .hold-placeholder{transform:translate(-50%,-50%) scale(.65)}
  .hold-caption{font-size:6px}
  .restart-button{grid-column:2;grid-row:5;height:33px;align-self:start}
  .mode-panel{display:none}
  .touch-controls{margin-top:17px}
  .timer-row{margin-top:9px;padding-top:9px;font-size:7px}
  .timer-row strong{font-size:8px}
  .site-footer{margin-top:19px;padding-top:14px;max-width:480px}
}
@media(max-width:360px){
  .game-layout{grid-template-columns:minmax(0,1fr) 112px;gap:8px}
  h1{font-size:20px}
  .board-overlay{padding:10px 7px 30px}
  .overlay-content h2{font-size:21px}
  .overlay-description{font-size:7px}
  .primary-button{font-size:8px}
  .record-row{padding-left:8px;padding-right:8px}
  .record-row>span{font-size:5.5px}
  .record-row strong{font-size:7px}
  .progress-caption{font-size:6px}
}