@layer theme{:root,:host{--font-sans:ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-serif:ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.absolute{position:absolute}.relative{position:relative}.start{inset-inline-start:var(--spacing)}.table{display:table}}.account-link{border:1px solid var(--ink);border-radius:999px;padding:9px 14px}.account-page{grid-template-columns:1fr minmax(380px,520px);align-items:start;gap:70px;min-height:calc(100vh - 82px);padding-block:90px;display:grid}.account-intro h1{letter-spacing:-.05em;margin:22px 0;font-size:clamp(42px,5.6vw,72px);line-height:1.1}.account-intro>p:not(.eyebrow){color:#514d45;max-width:620px;font-size:19px;line-height:1.75}.account-intro>a{margin-top:24px;font-weight:800;display:inline-block}.auth-card{background:var(--paper-2);border:1px solid var(--ink);border-top:10px solid var(--teal);padding:40px}.auth-card h2{letter-spacing:-.035em;margin:26px 0 12px;font-size:34px;line-height:1.25}.auth-card>p{color:#5d584f;line-height:1.7}.auth-tabs{border:1px solid var(--ink);grid-template-columns:1fr 1fr;display:grid}.auth-tabs button{min-height:48px;font:inherit;cursor:pointer;background:0 0;border:0;font-weight:800}.auth-tabs button+button{border-left:1px solid var(--ink)}.auth-tabs button.active{background:var(--ink);color:#fff}.auth-form{gap:18px;margin-top:30px;display:grid}.auth-form label{gap:8px;font-size:14px;font-weight:800;display:grid}.auth-form input{border:1px solid var(--line);width:100%;min-height:52px;font:inherit;background:#fff;padding:0 14px}.auth-form input:focus{border-color:var(--teal);outline:3px solid #177e7838}.auth-submit{border:1px solid var(--ink);background:var(--teal);color:#fff;width:100%;min-height:54px;font:inherit;cursor:pointer;font-weight:800}.auth-submit:disabled{opacity:.6;cursor:wait}.auth-message{border-left:5px solid var(--teal);background:#e6f3f0;margin-top:18px;padding:14px;color:var(--ink)!important}.auth-message.error{background:#f3ded8;border-color:#a33}.auth-email{overflow-wrap:anywhere;font-weight:800;color:var(--ink)!important}@media (max-width:800px){.account-page{grid-template-columns:1fr;gap:38px;min-height:auto;padding-block:55px}.auth-card{padding:26px}.account-intro h1{font-size:42px}}:root{--font-sans:"Noto Sans KR","Malgun Gothic","Apple SD Gothic Neo",Arial,sans-serif;--font-serif:"Source Serif 4",Georgia,"Times New Roman",serif;--ink:#151512;--paper:#f4f0e7;--paper-2:#fbf8f1;--line:#c9c2b7;--orange:#f28b22;--teal:#177e78}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--paper);color:var(--ink);font-family:var(--font-sans),Arial,sans-serif;margin:0}a{color:inherit;text-decoration:none}.shell{width:min(1180px,100% - 48px);margin-inline:auto}.site-header{z-index:20;border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f4f0e7f0;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;gap:28px;min-height:82px;display:flex}.brand{align-items:baseline;gap:12px;display:flex}.brand b{letter-spacing:-1px;font-size:25px}.brand span{font-family:var(--font-serif),serif;font-size:18px}.site-header nav{align-items:center;gap:22px;font-size:14px;font-weight:700;display:flex}.site-header nav a:hover{text-underline-offset:5px;text-decoration:underline}.eyebrow{letter-spacing:.16em;text-transform:uppercase;font-weight:800;font-size:12px!important;line-height:1.4!important}.hero{border-bottom:1px solid var(--line);padding:110px 0 96px}.hero h1,.course-hero h1{letter-spacing:-.055em;margin:24px 0 28px;font-size:clamp(45px,7vw,88px);font-weight:600;line-height:1.08}.hero-copy{color:#514d45;max-width:760px;font-size:21px;line-height:1.75}.hero-actions{flex-wrap:wrap;gap:12px;margin-top:40px;display:flex}.button{border:1px solid var(--ink);justify-content:center;align-items:center;min-height:58px;padding:0 24px;font-weight:800;display:inline-flex}.button-k2e{background:var(--orange)}.button-e2k{background:var(--teal);color:#fff}.section-heading{grid-template-columns:280px 1fr;gap:30px;margin-bottom:36px;display:grid}.section-heading h2{letter-spacing:-.04em;margin:0;font-size:clamp(30px,4vw,52px);font-weight:600;line-height:1.18}.bridge-section,.paths{padding:96px 0}.bridge-demo{border:1px solid var(--ink);background:var(--paper-2);grid-template-columns:1fr 90px 1fr;display:grid}.bridge-side{min-height:330px;padding:46px}.bridge-ko{border-top:10px solid var(--orange)}.bridge-en{border-top:10px solid var(--teal)}.language-tag{letter-spacing:.12em;text-transform:uppercase;font-size:12px;font-weight:800}.bridge-main{letter-spacing:-.035em;margin:34px 0;font-size:clamp(26px,3vw,42px);line-height:1.4}.bridge-note{color:#5d584f;line-height:1.75}.bridge-arrow{border-inline:1px solid var(--line);place-items:center;font-size:42px;display:grid}.paths{border-top:1px solid var(--line)}.path-grid{grid-template-columns:1fr 1fr;gap:20px;display:grid}.path-card{border:1px solid var(--ink);flex-direction:column;min-height:330px;padding:38px;display:flex}.path-card.orange{border-top:12px solid var(--orange)}.path-card.teal{border-top:12px solid var(--teal)}.path-top{justify-content:space-between;font-weight:800;display:flex}.path-card h3{letter-spacing:-.035em;margin:56px 0 16px;font-size:34px;line-height:1.24}.path-card p{color:#5d584f;line-height:1.75}.path-card>a{margin-top:auto;font-weight:800}.scene-section{border-block:1px solid var(--ink);grid-template-columns:1fr 1.2fr;gap:50px;padding-block:70px;display:grid}.scene-copy h2{letter-spacing:-.04em;font-size:43px;line-height:1.2}.scene-copy>p:last-child{line-height:1.8}.scene-equation{grid-template-columns:1fr 50px 1fr;align-items:center;display:grid}.thought-pieces{flex-direction:column;gap:9px;display:flex}.thought-pieces span{border:1px solid var(--line);background:var(--paper-2);padding:14px}.equals{text-align:center;font-size:28px}.result{background:var(--ink);color:#fff;padding:34px}.result strong{font-family:var(--font-serif),serif;font-size:48px}.result p{line-height:1.6}.site-footer{justify-content:space-between;padding-block:42px;display:flex}.course-page{padding-bottom:90px}.course-hero{border-bottom:1px solid var(--line);padding:95px 0 80px}.course-hero h1{white-space:pre-line}.course-hero>p:not(.eyebrow){max-width:780px;font-size:20px;line-height:1.75}.course-button{background:var(--ink);color:#fff;margin-top:28px}.course-k2e .course-button{box-shadow:7px 7px 0 var(--orange)}.course-e2k .course-button{box-shadow:7px 7px 0 var(--teal)}.curriculum{padding-top:80px}.lesson-list{border-top:1px solid var(--ink)}.lesson-list>a{border-bottom:1px solid var(--line);grid-template-columns:80px 1fr 30px;align-items:center;gap:20px;padding:22px 16px;display:grid}.lesson-list>a:hover{background:var(--paper-2)}.lesson-list span{font-family:var(--font-serif),serif;font-size:23px}.lesson-list strong{font-size:17px}.lesson-list em{font-size:22px;font-style:normal}.lesson-page{padding-bottom:100px}.lesson-title{padding:78px 0 38px}.lesson-title h1{letter-spacing:-.05em;margin:22px 0;font-size:clamp(42px,6vw,74px);line-height:1.12}.lesson-title>p:not(.eyebrow){max-width:820px;font-size:19px;line-height:1.7}.lesson-links{flex-wrap:wrap;gap:8px;margin-top:32px;display:flex}.lesson-links a{border:1px solid var(--line);border-radius:999px;padding:10px 15px;font-size:13px;font-weight:700}.step-nav{border:1px solid var(--ink);background:var(--paper-2);grid-template-columns:repeat(4,1fr);display:grid}.step-nav a{border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:86px;padding:16px;font-size:13px;font-weight:700}.step-nav span{font-family:var(--font-serif),serif;color:var(--orange);margin-bottom:5px;font-size:26px;display:block}.course-e2k .step-nav span{color:var(--teal)}.lesson-content{gap:22px;margin-top:48px;display:grid}.lesson-block{border:1px solid var(--line);background:var(--paper-2);padding:42px;scroll-margin-top:110px}.lesson-block h2{letter-spacing:-.035em;margin:14px 0 22px;font-size:clamp(27px,3.2vw,43px);line-height:1.25}.lesson-block>p:not(.eyebrow){font-size:17px;line-height:1.8}.feature-block{grid-template-columns:1.3fr 1fr;gap:35px;display:grid}.role-grid{gap:8px;display:grid}.role-grid span{background:var(--ink);color:#fff;justify-content:space-between;gap:15px;padding:17px;display:flex}.role-grid b{color:var(--orange)}.course-e2k .role-grid b{color:#66d0c9}.assembly{flex-wrap:wrap;gap:10px;margin:28px 0;display:flex}.assembly span{background:var(--orange);padding:14px 18px;font-weight:800}.final-sentence{font-family:var(--font-serif),serif!important;font-size:34px!important}.note-box{border-left:6px solid var(--orange);background:#fff7ec;padding:18px;line-height:1.7}.contrast-table{border-top:1px solid var(--line);display:grid}.contrast-table>div{border-bottom:1px solid var(--line);grid-template-columns:1fr 1fr;gap:20px;padding:18px 8px;font-size:18px;display:grid}.dialogue{background:var(--ink);color:#fff;max-width:800px;padding:28px}.dialogue p{line-height:1.6}.dialogue b{width:30px;color:var(--orange);display:inline-block}.writing-line{border-bottom:1px solid var(--line);margin:14px 0;padding:17px}details{border:1px solid var(--line);background:#fff;margin-top:25px;padding:20px}summary{cursor:pointer;font-weight:800}.three-line{border-left:7px solid var(--teal);background:#fff;margin:25px 0;padding:22px 26px}.three-line p{margin:7px 0}.three-line p:first-child{font-size:29px;font-weight:800}.three-line p:nth-child(2){color:var(--teal)}.number-list{grid-template-columns:1fr 1fr;gap:10px;padding:0;list-style:none;display:grid}.number-list li{background:#e6f3f0;padding:20px}.error-fix{grid-template-columns:1fr 1fr;gap:10px;display:grid}.error-fix>*{padding:18px}.error-fix span{background:#f3ded8}.error-fix strong{background:#d7eee8}.module-page{padding:100px 0}.module-page h1{letter-spacing:-.05em;max-width:900px;font-size:clamp(42px,6vw,72px);line-height:1.12}.module-page>p:not(.eyebrow){max-width:780px;font-size:19px;line-height:1.8}.module-demo{border:1px solid var(--ink);margin-top:45px;display:grid}.module-demo>*{border-bottom:1px solid var(--line);padding:25px;font-size:21px}.module-demo strong{background:var(--ink);color:#fff;border-bottom:0}@media (max-width:800px){.shell{width:min(100% - 28px,1180px)}.site-header nav{display:none}.header-inner{min-height:68px}.brand span{font-size:15px}.hero{padding:70px 0}.hero h1{font-size:45px}.hero-copy{font-size:17px}.hero-actions{flex-direction:column}.button{text-align:center;width:100%}.section-heading{grid-template-columns:1fr;gap:8px}.bridge-demo{grid-template-columns:1fr}.bridge-arrow{border-inline:0;border-block:1px solid var(--line);min-height:65px;transform:rotate(90deg)}.bridge-side{min-height:auto;padding:28px}.path-grid,.scene-section,.feature-block,.scene-equation{grid-template-columns:1fr}.equals{padding:15px;transform:rotate(90deg)}.path-card{min-height:290px}.path-card h3{margin-top:42px}.step-nav{display:flex;overflow-x:auto}.step-nav a{min-width:190px}.lesson-block{padding:26px}.contrast-table>div,.error-fix,.number-list{grid-template-columns:1fr}.lesson-list>a{grid-template-columns:50px 1fr 20px}.site-footer{flex-direction:column;gap:8px}}.hero h1{letter-spacing:-.04em;font-size:clamp(30px,4vw,52px);line-height:1.18}
.hero h1{letter-spacing:-.04em!important;font-size:clamp(30px,4vw,52px)!important;line-height:1.18!important}@media (max-width:800px){.hero h1{font-size:30px!important}}