@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800;900&display=swap');

:root{--paper:#fffdf6;--ink:#223c3a;--muted:#526965;--teal:#14655b;--coral:#bd4936;--line:#d9dfd2;--yellow:#ffe49a;--radius:22px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:26px}body{margin:0;background:var(--paper);color:var(--ink);font-family:'Noto Sans KR',sans-serif;font-size:17px;line-height:1.8;word-break:keep-all;overflow-wrap:anywhere}a{color:var(--teal);text-underline-offset:5px}button,input,textarea{font:inherit}button,a,input,textarea,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--coral);outline-offset:5px}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.4;letter-spacing:-.045em}h2{font-size:34px;margin-bottom:12px}h3{font-size:23px;margin-bottom:14px}p{margin-bottom:16px}.topbar,main,footer{width:min(1080px,calc(100% - 64px));margin-inline:auto}.topbar{display:flex;justify-content:space-between;gap:20px;align-items:center;min-height:94px;border-bottom:1px solid var(--line)}.brand{text-decoration:none;color:var(--ink);font-weight:800;letter-spacing:-.04em}.brand span{font-weight:400;color:var(--muted);font-size:14px;margin-left:9px}.back-link{font-size:14px;white-space:nowrap}.skip-link{position:absolute;left:16px;top:-100px;padding:12px;background:var(--paper);z-index:5}.skip-link:focus{top:10px}.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:70px;align-items:center;padding:72px 0 60px}.eyebrow{font-size:13px;font-weight:800;letter-spacing:.09em;color:var(--teal);margin-bottom:18px}.hero h1{font-size:clamp(36px,4.5vw,58px);font-weight:900;letter-spacing:-.06em;margin-bottom:24px}.hero h1 span{color:var(--teal)}.hero-description{font-size:19px;margin-bottom:30px}.button{display:inline-flex;gap:20px;justify-content:center;align-items:center;border:2px solid var(--teal);border-radius:12px;background:var(--teal);color:white;padding:13px 22px;text-decoration:none;font-weight:700;cursor:pointer;min-height:50px;line-height:1.5;transition:transform .16s,box-shadow .16s}.button:hover{transform:translateY(-2px);box-shadow:0 5px 0 #0e4b4330}.button.secondary{color:var(--teal);background:transparent}.note{position:relative;padding:36px 28px;background:var(--yellow);border-radius:4px 4px 38px 4px;box-shadow:8px 10px 0 #eadcb460;transform:rotate(3deg)}.note:before{content:'';position:absolute;top:-13px;left:38%;width:80px;height:29px;transform:rotate(-8deg);background:#e9ae8abb;border-left:2px dashed #fff7;border-right:2px dashed #fff7}.note-tag{display:block;font-size:13px;font-weight:800;letter-spacing:.04em;margin-bottom:22px}.note p{font-size:26px;font-weight:800;letter-spacing:-.04em;line-height:1.7}.note>span:last-of-type{font-size:14px}.note-doodle{margin-top:26px;border-top:1px dashed #b89945;padding-top:14px;font-size:15px}.section-nav{display:flex;gap:10px;flex-wrap:wrap;border-block:1px solid var(--line);padding:18px 0}.section-nav a{font-size:14px;text-decoration:none;padding:7px 14px;border-radius:50px;background:#edf2e8;font-weight:700}.section-nav a:last-child{margin-left:auto;background:transparent}.section{padding:64px 0;border-bottom:1px solid var(--line)}.section-heading{margin-bottom:32px}.section-heading>p:last-child{color:var(--muted)}.steps-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.step{border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:#fff}.step-number{display:inline-block;color:var(--coral);font-size:15px;font-weight:900;margin-bottom:10px}.step p:last-child{margin-bottom:0}.small,.field-help{font-size:14px;color:var(--muted);line-height:1.8}.sentence{border-left:3px solid #eec57b;background:#fbf7e9;padding:13px 16px;font-size:16px;border-radius:0 10px 10px 0}.promise{margin-top:28px;border-radius:var(--radius);padding:28px 32px;background:#eaf1e9}.promise h3{font-size:21px}.promise ul{padding-left:21px;margin:0}.promise li+li{margin-top:10px}.promise li{font-size:16px}kbd{font-family:inherit;font-size:12px;border:1px solid #cbd5d1;border-bottom-width:2px;border-radius:4px;padding:1px 5px;background:#fff}.practice-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}label{display:block;font-weight:700;margin-bottom:8px}.field-help{margin-bottom:10px}textarea{display:block;resize:vertical;width:100%;border:1px solid #aabbb2;border-radius:12px;background:white;padding:15px;min-height:100px;color:var(--ink);line-height:1.6;margin-bottom:22px;word-break:normal}textarea::placeholder{color:#637970}textarea[aria-invalid=true]{border:2px solid var(--coral)}.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.text-button{border:0;background:transparent;color:var(--muted);text-decoration:underline;text-underline-offset:4px;padding:12px;cursor:pointer}.form-error{color:#a93825;font-size:14px;margin-bottom:10px}.form-error:empty{display:none}.preview-card{display:flex;flex-direction:column;padding:28px;border:1px solid #cfded1;border-radius:var(--radius);background:repeating-linear-gradient(transparent,transparent 35px,#d9e4d76b 36px),#f1f6ed;min-height:380px}.preview-card .note-tag{color:var(--teal);background:#f1f6ed;align-self:flex-start}.preview-placeholder{color:var(--muted);padding-top:40px;text-align:center}#practicePreview{white-space:pre-wrap;overflow-wrap:anywhere}#practicePreview p{margin-bottom:18px}#practicePreview .preview-hint{font-size:14px;color:var(--teal);border-top:1px solid #becdbd;padding-top:16px;white-space:normal}.privacy-note{margin-top:auto;padding-top:24px;font-size:13px;color:var(--muted);margin-bottom:0}.checklist{margin-top:30px;padding-top:26px;border-top:1px dashed #c0cbbc}.checklist h3{font-size:20px}.checklist label{font-size:15px;display:flex;gap:10px;align-items:center;font-weight:400;cursor:pointer;min-height:34px}.checklist input{width:18px;height:18px;flex:none;accent-color:var(--teal)}.checklist .small{margin-top:12px;margin-bottom:0}.conversation{max-width:760px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px}.chat-example{display:flex;align-items:flex-start;gap:15px}.chat-example+.chat-example{margin-top:25px}.chat-example>div{min-width:0}.chat-example strong{font-size:13px;color:var(--muted)}.chat-example p{font-size:16px;background:#f1f4ef;padding:13px 17px;border-radius:0 14px 14px 14px;margin:7px 0 0}.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;flex:none;font-weight:800}.coral{background:#ffddd2;color:#923624}.teal{background:#d6e8e0;color:#145348}.yellow{background:#ffe9b7;color:#735300}.example-caption{font-size:15px;color:var(--muted);margin:22px 0}.secondary+.small{margin-top:15px;max-width:760px}.teacher-section{padding-block:32px}.teacher-section summary{cursor:pointer;font-size:19px;font-weight:700;min-height:48px;padding:8px 0}.teacher-section summary span{font-weight:400;font-size:13px;color:var(--muted);margin-left:12px}.teacher-content{font-size:15px;max-width:850px;padding-top:18px}.teacher-content ol{padding-left:24px}.teacher-content li{padding-left:5px;margin-bottom:20px}.teacher-content>p{padding:16px;background:#f5efde;border-radius:12px}footer{display:flex;gap:18px;justify-content:space-between;font-size:14px;color:var(--muted);padding:30px 0 45px}footer p{margin:0}footer a{white-space:nowrap}
@media(max-width:760px){.topbar,main,footer{width:calc(100% - 40px)}.topbar{min-height:76px}.brand span{display:none}.hero{grid-template-columns:1fr;gap:38px;padding:42px 0}.hero h1{font-size:40px}.hero-description{font-size:17px}.hero-note{max-width:420px;width:calc(100% - 18px);margin:0 auto 7px}.note{padding:28px}.note p{font-size:24px}.section-nav{gap:8px}.section-nav a{font-size:12px;padding:7px 10px}.section-nav a:last-child{margin-left:0}.section{padding:42px 0}h2{font-size:28px}.steps-grid,.practice-grid{grid-template-columns:1fr;gap:18px}.step{padding:24px}.promise{padding:24px}.preview-card{min-height:290px}.preview-placeholder{padding-top:15px}.conversation{padding:22px 17px}.chat-example{gap:11px}.avatar{width:34px;height:34px;font-size:14px}.chat-example p{padding:12px 14px;font-size:15px}.teacher-section summary span{display:block;margin-left:20px}.teacher-section{padding-block:24px}footer{flex-direction:column;padding-block:25px}}
/* Keep focus movement and browser click scrolling immediate and predictable. */
html{scroll-behavior:auto}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}.button:hover{transform:none}}
@media print{body{background:white;font-size:12pt}.topbar,main,footer{width:100%}.section-nav,.button,.back-link,.skip-link,.form-actions{display:none}.hero{padding:20px 0;gap:30px}.hero h1{font-size:30pt}.section{padding:20px 0}.step,.note,.conversation,.preview-card{break-inside:avoid;box-shadow:none}.note{transform:none}.steps-grid{gap:12px}.step{padding:15px}h2{font-size:22pt}.practice-grid{grid-template-columns:1fr 1fr}.teacher-section details:not([open]){display:none}}