:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}html{height:100%}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;align-items:flex-start;justify-content:center;min-width:320px;height:100vh;background-image:url(/images/background.png);background-size:cover;background-position:center;background-repeat:no-repeat;background-attachment:scroll;width:100%;overflow:hidden;position:fixed;inset:0}h1{font-size:3em;line-height:1;font-family:Bangers,system-ui;color:#fff;text-shadow:4px 4px 0 #000;letter-spacing:2px;margin-top:.2em;margin-bottom:.2em}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}#root{max-width:1280px;padding:0rem .25rem .25rem;text-align:center;height:100%;width:100%;overflow-y:auto;overflow-x:auto;display:flex;flex-direction:column;justify-content:flex-start}:root{--bg: #282c34;--primary: #4caf50;--accent: #2196F3;--muted: #f5f5f5;--text: #222;--gap: clamp(6px, 1.2vw, 12px);--step-size: clamp(36px, 3.5vw, 48px);--step-size-lg: clamp(52px, 6vw, 68px);--steps-gap: 18px;--touch: 48px;--die-size: clamp(54px, 7vw, 64px);--dice-gap: 2px;--dice-panel-padding: clamp(4px, 1vw, 8px);--dice-panel-width: calc( var(--die-size) * 6 + var(--dice-gap) * 5 + var(--dice-panel-padding) * 2 );--panel-vertical-gap: clamp(8px, 1.5vw, 16px);--pad: clamp(8px, 1.5vw, 12px);--content-max-width: clamp(320px, 78vw, 456px);--site-max-width: clamp(900px, 100vw, 1280px);--input-gap: 12px;--submit-width: clamp(88px, 8vw, 140px);--backspace-right-offset: 0px;--backspace-button-width: clamp(32px, 4.5vw, 40px);--app-max-width: clamp(560px, 90vw, 900px);--control-icon-size: clamp(36px, 4.5vw, 50px);--steps-area-height: clamp(100px, 18vh, 160px);--floating-offset: clamp(8px, 2vw, 16px);--steps-play-max-gap: 72px}.timer-pill{background:#f1f8e9;padding:6px 12px;border-radius:8px;color:var(--primary);font-weight:700}.steps-grid{display:flex;flex-direction:column;gap:8px;justify-content:center;align-items:center;padding:8px 6px}.steps-row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.step-cell{display:flex;flex-direction:column;align-items:center}.step-circle{width:var(--step-size-lg);height:var(--step-size-lg);border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;opacity:1;font-size:clamp(1.5rem,3vw,2.5rem)}.step-cell.current .step-circle{transform:scale(1.05);font-weight:900;opacity:1}.step-cell.completed .step-circle{background:#4caf50;opacity:1}.step-check{height:24px;margin-top:8px;color:#4caf50;font-weight:800;font-size:clamp(1.2rem,2.5vw,1.8rem)}.steps-grid.single-step{display:flex;justify-content:center;align-items:center;padding:8px 6px;min-height:160px}.steps-grid.single-step .step-circle{width:clamp(160px,5vw,192px);height:clamp(160px,5vw,192px);font-size:clamp(2.5rem,5vw,4rem)}@keyframes slideOutLeft{0%{transform:translate(0);opacity:1}to{transform:translate(-100%);opacity:0}}@keyframes slideInRight{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.steps-grid.slide-out-left{animation:slideOutLeft .5s ease-in-out}.steps-grid.slide-in-right{animation:slideInRight .5s ease-in-out}.dice-select{display:flex;flex-direction:column;align-items:center;gap:var(--gap);width:var(--dice-panel-width);max-width:100%;margin-left:auto;margin-right:auto;box-sizing:border-box}.dice-options{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.dice-btn{background:var(--primary);color:#fff;padding:8px 12px;border-radius:8px;font-weight:700;font-size:1em;cursor:pointer;outline:none!important;box-shadow:none!important;border:1px solid transparent;transition:transform .2s ease,box-shadow .2s ease;min-width:50px;min-height:50px;flex:0 0 auto}@media(hover:hover)and (pointer:fine){.dice-btn:hover{outline:none!important;box-shadow:0 6px 16px #0006;transform:scale(1.1);border-color:transparent!important}}.dice-btn:active{transform:scale(.95);box-shadow:0 3px 8px #00000040}.app-container{width:100%;max-width:var(--app-max-width);margin-left:auto;margin-right:auto;padding:0}.pad-12{padding:0 var(--pad)}@media(max-height:768px)and (orientation:landscape),(min-width:600px)and (max-width:900px){.action-row>.cta-button{margin-bottom:clamp(100px,3vh,200px)}}.center-row{display:flex;justify-content:center;align-items:center;gap:var(--gap);margin-bottom:var(--gap)}.center-col{display:flex;flex-direction:column;align-items:center;width:100%;max-width:var(--content-max-width)}.container-relative{position:relative;width:100%}.select-title{font-size:1em;margin-bottom:8px;color:#fff;font-weight:600}.numpad-wrap{width:100%;display:flex;flex-direction:column;gap:8px}.equation-row{display:flex;gap:8px;align-items:center}.equation-input{display:flex;flex-direction:column;gap:6px;position:relative}.equation-input .input-row{display:flex;align-items:center;gap:8px;position:relative}.equation-input{position:relative}.equation-input input{padding:6px calc(var(--backspace-button-width) + var(--backspace-right-offset)) 6px 4px;border-radius:0;border:0;border-bottom:0;width:calc(100% - var(--backspace-right-offset));background:transparent;font-size:1em;flex:1 1 auto;min-width:160px}.equation-input:after{content:"";position:absolute;height:2px;bottom:0;left:4px;right:calc(var(--backspace-button-width) + var(--backspace-right-offset));background:var(--primary);pointer-events:none}.equation-input:focus-within:after{background:color-mix(in srgb,var(--primary) 80%,white 20%);height:3px}.equation-input.has-value:after{background:var(--primary)}.steps-area{position:relative;width:100%;height:auto}.header-row{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--gap)}.flex-1{flex:1;display:flex}.justify-start{justify-content:flex-start}.justify-end{justify-content:flex-end}.quit-btn,.help-btn{width:var(--control-icon-size);height:var(--control-icon-size);font-size:clamp(1.2rem,2.4vw,2rem);font-weight:700;background-color:#fff;color:#333;border:2px solid #ccc;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0;margin-top:5px;box-shadow:0 4px 12px #0000004d;transition:transform .2s,box-shadow .2s}@media(hover:hover)and (pointer:fine){.quit-btn:hover,.help-btn:hover{transform:scale(1.1);box-shadow:0 6px 16px #0006;outline:none;border-color:#ccc}}.help-btn:active{transform:scale(.95)}@media(pointer:coarse){.quit-btn:hover,.quit-btn:focus,.help-btn:hover,.help-btn:focus{transform:none}}.equation-input input[readonly]{caret-color:transparent}.universal-copy{display:inline-block;margin-left:.8rem;background:transparent;border:none;color:var(--primary);padding:.2rem .6rem;border-radius:6px;font-weight:700;cursor:pointer;transition:none;box-shadow:none}.share-message .universal-copy{vertical-align:middle}.universal-copy svg{width:1.1rem;height:1.1rem;display:inline-block;vertical-align:middle;fill:currentColor}.share-image-wrapper{position:relative;display:inline-block;width:100%}.copy-image-btn{position:absolute;bottom:8px;right:8px;background:transparent;border:none;border-radius:6px;padding:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--primary);transition:none;box-shadow:none}.copy-image-btn svg{display:block;fill:currentColor}.difficulty-placeholder{color:#fff;background:var(--primary);font-weight:700}.floating-bottom{right:var(--floating-offset);bottom:var(--floating-offset)}.equation-input label{display:block;margin-bottom:4px;font-weight:700;color:var(--text)}.die{width:clamp(44px,4.5vw,50px);height:clamp(44px,4.5vw,50px);min-width:44px;min-height:44px;flex:0 0 auto;transition:transform .2s ease,box-shadow .2s ease}@media(hover:hover)and (pointer:fine){.die:hover{transform:scale(1.1);box-shadow:0 6px 16px #0006}}.die:active{transform:scale(.95);box-shadow:0 3px 8px #0000004d}.die-lg{width:var(--die-size);height:var(--die-size);min-width:44px;min-height:44px;flex:0 0 auto;border-radius:4px;transition:transform .2s ease,box-shadow .2s ease}@media(hover:hover)and (pointer:fine){.die-lg:hover{transform:scale(1.1);box-shadow:0 6px 16px #0006}}.die-lg:active{transform:scale(.95);box-shadow:0 3px 8px #0000004d}.action-row{display:flex;gap:12px;justify-content:center;width:min(var(--dice-panel-width),100%);margin-left:auto;margin-right:auto;margin-top:0}.action-row>.cta-button{flex:1;min-width:0;width:auto}@media(max-width:420px){.action-row{margin-bottom:18px}.action-row{margin-bottom:calc(96px + env(safe-area-inset-bottom))}}.share-backdrop{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#00000073;z-index:1000;padding:24px}.share-modal{padding:16px;border-radius:12px;border:2px solid var(--primary);background:linear-gradient(135deg,#e8f5e9,#fff);max-width:min(640px,92vw);box-sizing:border-box;position:relative;z-index:1001;box-shadow:0 10px 30px #00000040}.share-modal.mobile{width:min(92vw,100%);padding-left:max(12px,env(safe-area-inset-left));padding-right:max(12px,env(safe-area-inset-right))}.modal-close{position:absolute;right:10px;top:10px;background:transparent;border:none;font-size:24px;line-height:1;cursor:pointer;color:inherit}.share-image{width:100%;border-radius:8px;border:1px solid #ddd}.share-heading{font-weight:800;color:#1b5e20;font-size:1rem;text-transform:uppercase;letter-spacing:1px}.share-time{font-weight:700;font-size:1.2rem}.share-message{background:var(--muted);padding:12px;border-radius:8px;margin:12px 0}@media(prefers-color-scheme:dark){.share-modal{background:linear-gradient(135deg,#141414,#1f1f1f);border-color:#ffffff0f;color:#e9eef8}.share-heading{color:var(--accent)}.share-time{color:#e9eef8}.share-message{background:#ffffff08;color:#cfd8e3}.share-image{border-color:#ffffff0f}}.share-actions{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.social-icon{width:18px;height:18px;display:inline-block;vertical-align:middle}.social-btn span{line-height:1}.social-logo-wrapper{width:48px;height:48px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .12s ease,opacity .12s ease;opacity:.85}@media(hover:hover)and (pointer:fine){.social-logo-wrapper:hover{transform:scale(1.1);opacity:1}}.social-logo-wrapper:active{transform:scale(.95)}.social-logo{width:40px;height:40px;display:block}@media(max-width:600px){.social-logo-wrapper{width:auto;height:50px;flex:0 0 auto}.social-logo{width:44px;height:44px}.share-actions{flex-wrap:nowrap;overflow-x:auto;padding:6px 8px}}.share-modal.mobile{width:100%}@media(min-width:720px){.step-circle{width:var(--step-size-lg);height:var(--step-size-lg)}.timer-pill{font-size:1.2rem}.app-header h1{font-size:2rem}}.logo{height:6em;display:block;will-change:filter;transition:filter .3s}.logo:hover{filter:drop-shadow(0 0 2em #646cffaa)}.logo.react:hover{filter:drop-shadow(0 0 2em #61dafbaa)}@keyframes logo-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media(prefers-reduced-motion:no-preference){a:nth-of-type(2) .logo{animation:logo-spin infinite 20s linear}}.card{padding:.5em}input:hover,button:hover,textarea:hover,select:hover{outline:none!important;border:none!important}.app-header{display:flex;align-items:center;justify-content:center;gap:12px}.app-logo{width:clamp(192px,15vw,240px);margin-top:clamp(48px,5vw,96px);height:auto;object-fit:contain}.equation-row-wrap{display:inline-flex;align-items:flex-end;gap:var(--input-gap);width:min(var(--dice-panel-width),100%);margin-left:auto;margin-right:auto;margin-bottom:var(--panel-vertical-gap)}.equation-row-wrap>.equation-input{flex:0 0 auto;width:calc(100% - var(--submit-width) - var(--input-gap));min-width:160px}.equation-row-wrap>.cta-button{flex:0 0 var(--submit-width);width:var(--submit-width)}.cta-button{background-color:var(--primary);color:#fff;font-size:clamp(.8rem,2vw,1rem);font-weight:700;height:44px;margin-top:0;padding:0 16px;border:none;border-radius:8px;cursor:pointer;box-shadow:0 4px 8px #0003;transition:transform .2s,box-shadow .2s;text-align:center;width:var(--submit-width);display:inline-flex;align-items:center;justify-content:center;white-space:nowrap}@media(hover:hover)and (pointer:fine){.cta-button:hover,.cta-button:focus{transform:scale(1.1);box-shadow:0 6px 16px #0006}.cta-button:active{transform:scale(.95);box-shadow:0 3px 8px #00000040}}@media(hover:none){.cta-button:active{transform:scale(.95);box-shadow:0 2px 6px #0003}}.dice-panel{background-color:transparent;border-radius:0;padding:var(--dice-panel-padding);margin-bottom:var(--panel-vertical-gap);display:inline-block;width:var(--dice-panel-width);max-width:100%;margin-left:auto;margin-right:auto;box-sizing:border-box}.dice-row{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--dice-gap);margin-bottom:4px}.ops-row{display:flex;flex-wrap:wrap;justify-content:center;gap:6px}.action-col{display:flex;flex-direction:column;gap:8px}.timer-wrap{text-align:center;min-height:60px;display:flex;align-items:center;justify-content:center;margin-bottom:4px;margin-top:-8px}.header-steps-wrapper{display:flex;align-items:center;justify-content:center;gap:20px;margin:auto;padding:0}.intro-placeholder{font-size:1em;margin-bottom:8px;height:1.2em;visibility:hidden}.backspace-btn{position:absolute;right:var(--backspace-right-offset);top:50%;transform:translateY(-60%);background:#ffebee;color:#d32f2f;border:1px solid #ef9a9a;border-radius:6px;padding:clamp(6px,1.8vw,8px) clamp(6px,1.8vw,8px);font-size:1em;font-weight:700;cursor:pointer;outline:none!important;box-shadow:none!important;transition:transform .1s ease,box-shadow .1s ease}@media(hover:hover)and (pointer:fine){.backspace-btn:hover,.backspace-btn:focus,.backspace-btn:active{outline:none!important;box-shadow:0 6px 16px #0006;transform:translateY(-60%) scale(1.05);transform-origin:center;border-color:#ef9a9a!important}}.mt-10{margin-top:10px}.mt-8{margin-top:8px}.play-area{min-height:clamp(180px,30vh,360px);min-width:clamp(320px,60vw,480px);display:flex;flex-direction:column;justify-content:flex-start;align-items:center;margin-top:20px}.play-area.playing{margin-top:clamp(8px,4vw,60px)}.centered-flex{text-align:center;display:flex;align-items:center;justify-content:center}.centered-flex .cta-button{min-width:180px;width:min(250px,80%)}@media(min-width:980px){.centered-flex .cta-button{min-width:200px;width:auto}}.floating-bottom{position:fixed;right:var(--floating-offset);bottom:var(--floating-offset);background:transparent;border-radius:8px;box-shadow:0 4px 12px #00000026;padding:0;z-index:1000}.difficulty-select{background-color:var(--primary);color:#fff;font-weight:600;text-align:center!important;text-align-last:center!important;border:none;border-radius:8px;padding:8px 12px;font-size:.75em;box-shadow:0 2px 8px #00000014;outline:none;cursor:pointer;appearance:none;-webkit-appearance:none;-moz-appearance:none;min-width:clamp(48px,2vw,96px);margin-top:5px;margin-left:auto;margin-right:0}@media(hover:hover)and (pointer:fine){.difficulty-select:hover{transform:scale(1.1);box-shadow:0 6px 16px #0006}}@media(min-width:980px){.steps-grid{flex-direction:row;gap:var(--steps-gap);flex-wrap:wrap}.steps-area{height:var(--steps-area-height)}.header-steps-wrapper{flex-direction:row}.steps-grid:not(.single-step){flex-wrap:nowrap}}.custom-alert-overlay{position:fixed;inset:0;background-color:#00000080;display:flex;align-items:center;justify-content:center;z-index:10000;animation:fadeIn .2s ease-in-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.custom-alert-box{background:#fff;border-radius:12px;padding:24px;max-width:300px;width:90%;box-shadow:0 8px 32px #0000004d;animation:slideUp .3s ease-out}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.custom-alert-message{font-size:16px;line-height:1.5;color:#333;margin-bottom:20px;text-align:center}.custom-alert-button{width:100%;padding:12px 24px;background-color:#2196f3;color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:all .2s ease}.custom-alert-button:hover{background-color:#1976d2;transform:scale(1.02)}.custom-alert-button:active{transform:scale(.98)}.custom-alert-button:focus{outline:2px solid #2196F3;outline-offset:2px}.howto-modal-overlay{position:fixed;inset:0;background-color:#0009;display:flex;align-items:center;justify-content:center;z-index:10000;animation:fadeIn .2s ease-in-out}.howto-modal-box{background:#fff;border-radius:16px;padding:32px;max-width:500px;width:90%;max-height:80vh;overflow-y:auto;box-shadow:0 12px 40px #0000004d;animation:slideUp .3s ease-out;position:relative}.howto-close-btn{position:absolute;top:16px;right:16px;background:#fff;border:2px solid #ccc;font-size:32px;color:#333;cursor:pointer;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:50%;padding:0;box-shadow:0 4px 12px #0000004d;transition:transform .2s,box-shadow .2s}.howto-close-btn:hover{transform:scale(1.1);box-shadow:0 6px 16px #0006;border-color:#ccc}.howto-title{font-size:28px;font-weight:700;color:#2196f3;margin-bottom:24px;margin-top:0;text-align:center}.howto-content{display:flex;flex-direction:column;gap:16px}.howto-step{font-size:16px;line-height:1.6;color:#333;margin:0;padding:12px;background-color:#f8f9fa;border-radius:8px;border-left:4px solid #2196F3}@media(max-width:600px){.howto-modal-box{padding:24px;max-width:95%}.howto-title{font-size:24px;margin-bottom:20px}.howto-step{font-size:14px;padding:10px}.howto-close-btn{top:12px;right:12px;font-size:28px;width:36px;height:36px}}