:root{color-scheme:light;--ink:#173e34;--muted:#53665c;--green:#087b68;--paper:#faf9f3;--line:#d7dfd2;--sage:#e5eddb}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:8rem}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;line-height:1.7;word-break:keep-all;overflow-wrap:break-word}a{color:inherit;text-underline-offset:.25em}img{display:block;max-width:100%;height:auto}h1,h2,h3,p,figure{margin:0}h1,h2,h3{line-height:1.25;letter-spacing:-.05em}h2{font-size:clamp(2rem,4vw,3.5rem)}h3{font-size:1.35rem}p+p{margin-top:1rem}.wrap{width:min(1120px,calc(100% - 3rem));margin-inline:auto}.skip{position:absolute;left:1rem;top:-5rem;z-index:10;background:#fff;padding:1rem}.skip:focus{top:1rem}:focus-visible{outline:3px solid #cc7821;outline-offset:5px}.header{position:sticky;top:0;z-index:5;background:rgba(250,249,243,.97);border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;justify-content:space-between;gap:2rem;min-height:86px}.brand{flex-shrink:0}.brand img{width:165px;height:auto}.nav-links{display:flex;gap:1.8rem;font-size:.875rem;font-weight:600}.nav-links a{text-decoration:none;padding:.75rem 0}.nav-links a:hover{color:var(--green);text-decoration:underline}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:3rem;align-items:center;padding-block:4.5rem 5rem}.eyebrow{font-size:.8rem;font-weight:700;letter-spacing:.08em;color:var(--green);margin-bottom:1.8rem}.dot{display:inline-block;width:7px;height:7px;background:var(--green);border-radius:50%;margin-right:.4rem}.app-name{display:flex;align-items:center;gap:.85rem;font-weight:700;font-size:1.35rem;margin-bottom:1.8rem}.app-name img{width:54px;height:54px;border-radius:13px}h1{font-size:clamp(3.5rem,6.6vw,5.5rem);line-height:1.14;letter-spacing:-.065em}h1 em{font-style:normal;color:var(--green)}.lead{font-size:clamp(1.1rem,1.7vw,1.3rem);line-height:1.9;color:var(--muted);margin-top:1.6rem}.button{display:inline-flex;align-items:center;gap:2rem;background:var(--ink);color:white;border-radius:99px;padding:1rem 1.5rem;margin-top:2rem;text-decoration:none;font-weight:600}.button:hover{background:var(--green)}.hero-note{font-size:.75rem;color:var(--muted);margin-top:1.25rem}.hero-visual{padding:2rem 1.5rem 1.2rem;border-radius:48% 48% 1.5rem 1.5rem;background:var(--sage)}.screen{width:min(100%,300px);margin:auto;overflow:hidden;border:6px solid #fff;border-radius:1.8rem;box-shadow:0 16px 38px #244e3c1a;background:#eef4e9}.screen img{width:100%;height:auto}figcaption{font-size:.72rem;text-align:center;color:var(--muted);margin-top:1rem}.learning{background:#eef1e7;padding:5rem 0}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:3rem}.section-heading>p{color:var(--muted);font-size:1.05rem}.steps{list-style:none;padding:0;margin:3rem 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:2rem}.steps li{border-top:1px solid #b5c5b4;padding-top:1.5rem}.step-number{font-size:.8rem;letter-spacing:.1em;color:var(--green);display:block;margin-bottom:1rem}.steps p{color:var(--muted);margin-top:.75rem}.feature{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:clamp(3rem,8vw,7rem);padding-block:5rem}.feature-visual{padding:2rem 1rem 1.2rem;border-radius:1.5rem;background:#eeeadd}.feature-visual .screen{width:min(100%,285px)}.feature-copy>p:not(.eyebrow):not(.lead){margin-top:1.4rem;color:var(--muted)}.fine{font-size:.85rem;color:var(--muted)}.game-section{background:#e9efe3}.game-visual{background:#d8e4cb}.game-list{list-style:none;margin:2rem 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:.75rem 1rem}.game-list li{padding:.75rem 0;border-bottom:1px solid #bdcdb7;font-size:.95rem}.guide{padding-block:5rem}.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem;margin-top:3rem}.guide-grid article{border-top:2px solid var(--ink);padding-top:1.5rem}.guide-grid p{margin-top:1rem;color:var(--muted)}.text-link{display:inline-block;font-weight:700;margin-top:1.4rem}.faq{margin-top:3.5rem;border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line);padding:1.2rem 0}summary{cursor:pointer;font-weight:600;padding-right:.5rem}details p{max-width:55rem;color:var(--muted);padding:1rem 0 .3rem}.screen-note{font-size:.75rem;color:var(--muted);margin-top:2rem;max-width:50rem}.closing{background:var(--ink);color:var(--paper);padding:4.5rem 0}.closing .eyebrow{color:#bdd8a6}.closing p:not(.eyebrow){margin-top:2rem;color:#d1ddd3}.closing a{display:inline-block;font-size:clamp(1rem,2vw,1.3rem);margin-top:.5rem}.footer{display:flex;align-items:center;flex-wrap:wrap;gap:1rem 2rem;padding-block:2rem;font-size:.8rem}.footer span{margin-left:auto;color:var(--muted)}
@media(max-width:800px){.nav{gap:1rem;flex-wrap:wrap;padding-block:1rem}.nav-links{gap:1.2rem}.hero{gap:2rem}.hero-visual{padding:1.5rem .75rem 1rem}.section-heading{display:block}.section-heading>p{margin-top:1.5rem}.feature{gap:2.5rem}.steps{gap:1rem}.guide-grid{gap:2rem}}
@media(max-width:600px){html{scroll-padding-top:9rem}.wrap{width:calc(100% - 2.5rem)}.nav{display:block;min-height:auto}.brand{display:inline-block}.brand img{width:140px}.nav-links{justify-content:space-between;gap:.6rem;font-size:.75rem;margin-top:.4rem}.nav-links a{padding:.35rem 0}.hero{grid-template-columns:1fr;padding-block:2.5rem 3rem;gap:2.5rem}.hero-copy .eyebrow{margin-bottom:1.2rem}.app-name{margin-bottom:1.3rem}h1{font-size:3.8rem}.hero-visual{width:100%;max-width:390px;margin:auto;padding:2rem 1rem 1rem}.hero-visual .screen{width:280px}.hero-note{font-size:.7rem}.learning,.guide{padding-block:3.5rem}.steps{grid-template-columns:1fr;gap:1.5rem;margin-top:2rem}.steps li{position:relative;padding:1.2rem 0 0 2.8rem}.step-number{position:absolute;left:0;top:1.4rem}.steps p br{display:none}.feature{grid-template-columns:1fr;padding-block:3.5rem;gap:2rem}.feature-copy{grid-row:1}.feature-visual{max-width:390px;width:100%;margin:auto}.guide-grid{grid-template-columns:1fr;gap:2rem;margin-top:2rem}.closing{padding-block:3rem}.footer{gap:.8rem 1.5rem}.footer span{flex-basis:100%;margin-left:0}}
.download-actions{display:flex;flex-wrap:wrap;align-items:center;gap:0 1.5rem}
.download-actions .text-link{margin-top:2rem}
.closing a.button{display:inline-flex;background:var(--paper);color:var(--ink);font-size:1rem;margin-top:2rem}
.closing a.button:hover{background:#dcebd2}
.hero-visual .screen{max-width:100%}
.hero>*{min-width:0}
.steps li{min-width:0}
.step-preview{margin-top:1.75rem}
.step-preview .screen{width:min(100%,260px);border-width:5px;border-radius:1.5rem}
.modes{padding-block:5rem;border-bottom:1px solid var(--line)}
.mode-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:2rem;margin-top:3rem}
.mode-panel{padding:2rem 1.5rem;background:#e5eddb;border-radius:1.5rem}
.mode-general{background:#e8edf0}
.mode-panel figcaption{margin:0 0 1.75rem;color:var(--ink)}
.mode-panel figcaption p{margin-top:.5rem;font-size:.9rem;color:var(--muted)}
.mode-panel .screen{width:min(100%,300px)}
@media(max-width:600px){.steps li{padding-left:0}.steps .step-number{position:static;margin-bottom:.75rem}.step-preview{margin-top:1.25rem}.steps{gap:2.5rem}.modes{padding-block:3.5rem}.mode-grid{grid-template-columns:1fr;gap:1.5rem;margin-top:2rem}.mode-panel{padding:1.5rem 1rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}