:root{font-family:ui-rounded,"Arial Rounded MT Bold",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#24345a;background:#f5f7ff;font-synthesis:none;--blue:#4858ce;--ink:#24345a;--line:#e0e5f4;--yellow:#ffdc6e;--mint:#d9f3e9;--purple:#ede9ff}*{box-sizing:border-box}body{margin:0;min-width:280px;background:radial-gradient(ellipse at 4% 1%,#e1edff 0,transparent 39%),radial-gradient(ellipse at 99% 90%,#eee8ff 0,transparent 36%),#f5f7ff}button,select,summary{-webkit-tap-highlight-color:transparent}button,select{font:inherit}button{cursor:pointer;min-height:48px;border:0;font-weight:750;color:var(--ink);touch-action:manipulation}button:focus-visible,select:focus-visible,summary:focus-visible,canvas:focus-visible,.quick-card:focus-visible{outline:3px solid #9a3b85;outline-offset:4px}button:active{transform:translateY(1px)}button:disabled{opacity:.4;cursor:default}button svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}[hidden]{display:none!important}.app{max-width:960px;margin:0 auto;padding:24px 24px 16px}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{display:grid;place-items:center;background:var(--yellow);border-radius:15px;transform:rotate(-7deg);width:49px;height:49px;font-weight:900;font-size:25px;box-shadow:0 3px 0 #ebbe48}.brand h1{font-size:21px;line-height:1.15;letter-spacing:-.5px;margin:0;font-weight:850}.brand h1 span{display:block;font-weight:600;font-size:17px;color:#657195;letter-spacing:0}.icon-button{display:grid;place-items:center;background:#fff;border:1px solid var(--line);width:48px;min-width:48px;border-radius:50%;font-size:30px}.icon-button svg{fill:#ffdc6e;stroke:#a67c13}.mode-tabs{display:flex;padding:5px;background:#e6eafa;border-radius:18px;gap:5px;width:420px;max-width:100%;margin:0 auto 20px}.mode-tabs button{flex:1;min-height:46px;font-size:16px;border-radius:13px;background:transparent;color:#677398;white-space:nowrap}.mode-tabs button span{font-size:21px;margin-right:5px}.mode-tabs button.active{background:#fff;box-shadow:0 3px 10px #2d396110;color:#3545b4}.game{border:1px solid #e3e7f5;border-radius:30px;background:#fff;box-shadow:0 10px 50px #546bb210;padding:22px 25px 20px}.play-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:14px}.case-switch{display:flex;border:1px solid var(--line);padding:4px;border-radius:13px;background:#fafbff}.case-switch button{font-size:16px;min-height:37px;min-width:58px;border-radius:9px;background:transparent;color:#7884a2}.case-switch button.selected{background:var(--purple);color:#5249b5}.letter-count{font-size:12px;font-weight:800;letter-spacing:1.4px;color:#7c87a3}.order-control{font-size:14px;display:flex;gap:7px;align-items:center}.order-control select{background:#fff;border:1px solid var(--line);border-radius:10px;padding:11px 8px;color:#435278;font-size:14px;max-width:205px}.learn-layout{display:grid;grid-template-columns:40% 60%;align-items:stretch}.word-panel{display:flex;align-items:center;flex-direction:column;justify-content:center;padding:12px 20px 10px 0;text-align:center}.eyebrow{font-size:12px;letter-spacing:2px;font-weight:800;color:#8190ae}.letter-pair{font-size:78px;font-weight:850;letter-spacing:0;line-height:1.1;margin:10px 0 15px;color:#4858ce;display:flex;gap:5px}.letter-pair span+span{color:#8894ed}.word-emoji{font-family:"Apple Color Emoji","Segoe UI Emoji","Noto Color Emoji",sans-serif;display:block;font-size:90px;line-height:1.2;margin:0 0 15px;filter:drop-shadow(0 8px 4px #687d9e12)}.word-panel h2{font-size:21px;font-weight:500;margin:0 0 21px}.word-panel h2 strong{font-weight:800}.hear-button{background:#eef0ff;color:#495ac1;display:flex;align-items:center;gap:8px;border-radius:25px;min-width:132px;justify-content:center;padding:0 18px;font-size:16px}.trace-panel{border-left:1px solid #edf0f8;padding-left:25px;min-width:0}.trace-heading{display:flex;justify-content:space-between;align-items:baseline;gap:5px;margin:7px 0 10px}.trace-heading h2{font-size:17px;margin:0;font-weight:800}.pencil-note{font-size:13px;color:#8591ac}.trace-board{position:relative;width:100%;aspect-ratio:1/1;max-height:355px;background:#fcfdff;border:2px solid #edf0fb;border-radius:20px;overflow:hidden;touch-action:none;overscroll-behavior:contain;user-select:none;-webkit-user-select:none}.trace-board>svg,.trace-board>canvas{position:absolute;inset:0;width:100%;height:100%}.writing-line{stroke:#e6eaf6;stroke-width:1;fill:none}.writing-midline{stroke:#e9ecf6;stroke-width:1;stroke-dasharray:4 5;fill:none}.guide-outline{fill:none;stroke:#b3c4ed;stroke-width:43;stroke-linecap:round;stroke-linejoin:round}.guide-inside{fill:none;stroke:#f7faff;stroke-width:38;stroke-linecap:round;stroke-linejoin:round}.guide-center{fill:none;stroke:#bbc9e9;stroke-width:1.6;stroke-dasharray:3 6;stroke-linecap:round;stroke-linejoin:round}.start-dot{fill:#fbd367;stroke:#c29a34;stroke-width:1.2}.trace-board canvas{touch-action:none;cursor:crosshair}.trace-actions{display:flex;align-items:center;justify-content:space-between;margin-top:9px;gap:6px}.text-button{font-size:15px;background:transparent;padding:6px 10px;color:#657291;display:flex;justify-content:center;align-items:center;gap:6px;white-space:nowrap}.text-button>span{font-size:25px}.done-button{background:#e6f6ed;color:#39775c;padding:0 18px;font-size:15px;border-radius:12px;display:flex;align-items:center;gap:8px}.done-button>span{color:#61a27f;font-size:20px}.feedback{min-height:39px;display:grid;place-items:center;text-align:center;color:#6e7b9b;font-size:14px;margin-top:10px;font-weight:500}.feedback.cheer{color:#4d58b9;font-weight:700}.navigation{display:flex;gap:12px;margin-top:6px}.back-button{background:#f3f5fc;border:1px solid #e8ecf6;border-radius:15px;padding:0 26px;font-size:16px;min-height:54px}.next-button{background:var(--blue);color:#fff;border-radius:15px;font-size:17px;min-height:54px;padding:0 26px;display:flex;align-items:center;justify-content:center;gap:22px;box-shadow:0 4px 0 #3544ad}.navigation .next-button{flex:1}.next-button span{display:grid;place-items:center;background:#ffffff20;border-radius:8px;width:29px;height:30px}.alphabet-picker{background:#fff;border:1px solid #e2e7f7;border-radius:19px;margin-top:18px;padding:0 18px}.alphabet-picker summary{display:flex;align-items:center;justify-content:space-between;min-height:62px;list-style:none;font-size:16px;font-weight:700;cursor:pointer}.alphabet-picker summary::-webkit-details-marker{display:none}.alphabet-summary{color:#91a0c2;letter-spacing:4px;font-weight:500}.alphabet-summary b{color:var(--blue);font-size:22px;font-weight:500;display:inline-block;transition:transform .2s}.alphabet-picker[open] .alphabet-summary b{transform:rotate(45deg)}.alphabet-grid{display:grid;grid-template-columns:repeat(13,1fr);gap:7px;padding:0 0 17px}.alphabet-grid button{background:#f2f5fd;border-radius:11px;font-size:19px;min-width:0;min-height:48px}.alphabet-grid button.current{background:var(--blue);color:#fff}.footer-note{text-align:center;font-size:12px;color:#8d99b4;margin:17px 0 0}.footer-note span{color:#e1b744;margin-left:5px}.trace-celebration{pointer-events:none;position:absolute;inset:0;display:grid;place-items:center;background:#ffffff16}.trace-celebration span{font-size:86px;color:#f5c33e;text-shadow:0 4px 0 #fff,0 0 30px #fff;animation:celebrate .8s ease both}@keyframes celebrate{0%{transform:scale(.2) rotate(-25deg);opacity:0}45%{transform:scale(1.3) rotate(12deg);opacity:1}100%{transform:scale(1);opacity:1}}.quick-panel{max-width:530px;margin:0 auto}.quick-question{font-size:19px;text-align:center;font-weight:750;margin:7px 0 15px}.quick-card{background:#f0edff;border:2px solid #e2dcfa;border-radius:25px;position:relative;display:flex;align-items:center;justify-content:center;flex-direction:column;height:320px;touch-action:none;overscroll-behavior:contain;user-select:none;-webkit-user-select:none;transition:background .16s,border-color .16s;overflow:hidden}.quick-card.swipe-yes{background:#dff5e9;border-color:#a4dbc2}.quick-card.swipe-no{background:#fff0d6;border-color:#efd28f}.quick-letter{font-size:151px;line-height:1.1;font-weight:850;color:#4955bb}.quick-clue{display:flex;align-items:center;gap:10px;font-size:22px;color:#586186;font-weight:600}.quick-clue>span{font-family:"Apple Color Emoji","Segoe UI Emoji","Noto Color Emoji",sans-serif;font-size:39px}.swipe-top,.swipe-bottom{position:absolute;font-size:13px;font-weight:650;color:#716b96;left:0;right:0;text-align:center}.swipe-top{top:13px}.swipe-bottom{bottom:13px}.quick-ratings{display:flex;gap:12px;margin-top:14px}.quick-ratings>button{flex:1;border-radius:15px;min-height:65px;font-size:17px;padding:10px}.quick-ratings>button>span{display:block;font-size:12px;font-weight:600;margin-top:2px;opacity:.75}.again-button{background:#fff0d6;color:#805d20}.know-button{background:#dff5e9;color:#327554}.quick-extras{display:flex;justify-content:center;gap:25px;margin-top:8px}.quick-extras button{font-size:15px}.quick-extras .listening{color:#aa3870;background:#fff0f5;border-radius:15px}.voice-status,.shuffle-hint{font-size:13px;color:#7d87a1;text-align:center;margin:0;line-height:1.5}.shuffle-hint{margin-top:5px}.game.is-quick .feedback{margin-top:5px}.game.is-quick .letter-count{display:none}.game.is-quick{padding-bottom:12px}.dialog{border:0;border-radius:25px;width:calc(100% - 32px);max-width:540px;padding:24px;max-height:calc(100dvh - 40px);color:var(--ink);box-shadow:0 20px 80px #24345a30}.dialog::backdrop{background:#20283d66;backdrop-filter:blur(4px)}.dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px}.dialog-heading h2{font-size:24px;letter-spacing:-.6px;margin:0}.dialog p{font-size:16px;line-height:1.6;color:#64718e}.dialog p.small-note{font-size:13px}.progress-summary{padding:15px;background:#f0f2ff;border-radius:15px;font-size:16px;color:#4e5cb4;font-weight:700}.progress-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:7px;margin:18px 0}.progress-item{display:flex;align-items:center;flex-direction:column;padding:8px 2px;background:#f2f4fa;border-radius:11px;min-width:0}.progress-item b{font-size:21px}.progress-item span{font-size:11px;margin-top:4px;color:#727e99}.progress-item.practiced{background:#e6f5ed}.progress-item.learning{background:#fff1d7}.reset-button{background:transparent;color:#7a6177;text-decoration:underline;font-size:14px;padding:0}.reset-confirm{background:#fff4f0;padding:13px;border-radius:12px;margin-top:10px}.reset-confirm p{margin-top:0;font-size:14px}.danger-button{background:#a24458;color:white;border-radius:12px;font-size:14px;padding:0 14px}.reset-confirm .text-button{display:inline-flex}.dialog .next-button{width:100%;margin-top:20px}.noscript{padding:30px;text-align:center}
@media(max-width:650px){.app{padding:17px 15px 15px}.topbar{margin-bottom:20px}.brand-mark{width:42px;height:42px;font-size:22px;border-radius:12px}.brand h1{font-size:18px}.brand h1 span{font-size:15px}.icon-button{width:44px;min-width:44px;min-height:44px}.mode-tabs{margin-bottom:15px}.mode-tabs button{font-size:15px;min-height:43px}.mode-tabs button span{font-size:19px}.game{padding:14px 15px 15px;border-radius:25px}.play-top{margin-bottom:9px;gap:7px}.letter-count{font-size:11px;letter-spacing:.8px}.case-switch{padding:3px}.case-switch button{min-width:49px;min-height:34px;font-size:15px}.learn-layout{display:flex;flex-direction:column}.word-panel{display:grid;grid-template-columns:78px 1fr 48px;grid-template-rows:1fr 1fr;column-gap:10px;padding:8px 2px 15px;text-align:left;align-items:center;justify-content:normal}.eyebrow{display:none}.letter-pair{grid-column:2;grid-row:1;font-size:44px;line-height:1;margin:0;gap:3px;align-self:end}.word-emoji{grid-column:1;grid-row:1/3;font-size:63px;margin:0;text-align:center}.word-panel h2{grid-column:2;grid-row:2;font-size:16px;margin:4px 0 0;align-self:start;line-height:1.3}.hear-button{grid-column:3;grid-row:1/3;font-size:0;min-width:46px;min-height:46px;padding:0;border-radius:50%;gap:0}.hear-button svg{width:23px;height:23px}.trace-panel{border-left:0;border-top:1px solid #edf0f8;padding:12px 0 0}.trace-heading{margin:0 0 9px}.trace-heading h2{font-size:16px}.pencil-note{font-size:12px}.trace-board{max-height:300px;aspect-ratio:1.06/1;border-radius:17px}.trace-actions{margin-top:4px}.trace-actions button{min-height:43px}.done-button{padding:0 15px;font-size:14px}.text-button{font-size:14px}.feedback{font-size:13px;min-height:30px;margin-top:5px}.navigation{gap:9px;margin-top:5px}.back-button{padding:0 20px;min-height:51px;font-size:15px}.next-button{min-height:51px;font-size:16px}.alphabet-picker{margin-top:14px;padding:0 14px}.alphabet-picker summary{min-height:55px;font-size:15px}.alphabet-grid{grid-template-columns:repeat(7,1fr);gap:6px}.alphabet-grid button{font-size:19px;min-height:44px}.footer-note{font-size:12px;margin-top:13px}.order-control{gap:0;font-size:0;min-width:0}.order-control select{font-size:12px;max-width:183px;padding:10px 6px}.quick-question{font-size:18px;margin-top:13px}.quick-card{height:300px}.quick-letter{font-size:145px}.quick-ratings>button{font-size:16px}.quick-extras{gap:14px}.game.is-quick .feedback{margin-top:9px}.dialog{padding:19px}.dialog-heading h2{font-size:22px}}
@media(max-width:360px){.app{padding-left:9px;padding-right:9px}.game{padding-left:12px;padding-right:12px}.word-panel{grid-template-columns:67px 1fr 44px;column-gap:7px}.word-emoji{font-size:58px}.word-panel h2{font-size:14px}.letter-count{font-size:10px}.case-switch button{min-width:43px}.order-control select{max-width:166px;font-size:11px}.quick-extras{gap:4px}.quick-ratings>button{font-size:14px}.alphabet-grid{grid-template-columns:repeat(6,1fr)}}
@media(min-width:651px) and (max-height:760px){.app{padding-top:15px}.topbar{margin-bottom:15px}.trace-board{max-height:310px}.mode-tabs{margin-bottom:14px}.game{padding-top:16px}.alphabet-picker{margin-top:12px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.confetti-piece{position:absolute;left:50%;top:50%;width:8px;height:13px;border-radius:3px;animation:confetti-burst 1.1s ease-out both}@keyframes confetti-burst{0%{transform:translate(-50%,-50%) scale(.4);opacity:0}12%{opacity:1}100%{transform:translate(calc(-50% + var(--dx)),calc(-50% + var(--dy))) rotate(var(--spin));opacity:0}}
@media(prefers-reduced-motion:reduce){.confetti-piece{display:none}.trace-celebration span{font-size:64px}}
/* PWA / device polish: safe areas (notch, home indicator), no pull-to-refresh or text inflation, bigger tracing on tablets */
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;overscroll-behavior-y:none}
.app{padding-left:max(24px,env(safe-area-inset-left));padding-right:max(24px,env(safe-area-inset-right));padding-top:max(24px,env(safe-area-inset-top));padding-bottom:max(16px,env(safe-area-inset-bottom))}
@media(max-width:650px){.app{padding-left:max(15px,env(safe-area-inset-left));padding-right:max(15px,env(safe-area-inset-right));padding-top:max(17px,env(safe-area-inset-top));padding-bottom:max(15px,env(safe-area-inset-bottom))}}
@media(max-width:360px){.app{padding-left:max(9px,env(safe-area-inset-left));padding-right:max(9px,env(safe-area-inset-right))}}
@media(min-width:651px) and (max-height:760px){.app{padding-top:max(15px,env(safe-area-inset-top))}}
@media(min-width:651px) and (min-height:900px){.trace-board{max-height:470px}.letter-pair{font-size:96px}.word-emoji{font-size:110px}.quick-card{height:380px}.quick-letter{font-size:180px}}
@media(orientation:landscape) and (max-height:500px){.trace-board{max-height:calc(100dvh - 60px)}.quick-card{height:calc(100dvh - 60px)}}
body{min-height:100vh;min-height:100dvh}
@media(min-width:651px) and (orientation:portrait) and (min-height:900px){.learn-layout{grid-template-columns:34% 66%}.letter-pair{font-size:80px}.word-emoji{font-size:96px}}