/* Platform-aligned landing: charcoal, neutral canvas, white panels and lime accents. */
:root { --ink: #1b1e24; --muted: #666d79; --line: #e6e8ec; }
html { scroll-padding-top: 100px; }
body { background: #f7f8f9; font-family: 'Pretendard Variable', sans-serif; }
body::before, body::after { display: none; }
[hidden] { display: none !important; }
.bg-mons { display: none; }
.wrap { width: min(1240px, calc(100% - 80px)); }
.skip-content { position: fixed; left: 20px; top: -100px; z-index: 100; padding: 14px 20px; background: #1b1e24; color: white; border-radius: 8px; }
.skip-content:focus { top: 12px; }
a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 3px solid #4b711a; outline-offset: 5px; }
body > header { background: rgba(247,248,249,.96); border-bottom: 1px solid #e6e8ec; }
.nav { height: 80px; gap: 24px; }
.nav-links { gap: 23px; font-size: 14px; white-space: nowrap; }
.logo { font-size: 17px; white-space: nowrap; }
.nav-cta { align-items: center; }
.btn { border-radius: 8px; box-shadow: none; min-height: 44px; }
.btn-lg { min-height: 56px; padding: 16px 23px; font-size: 16px; font-weight: 700; border-radius: 8px; }
.btn-ink { background: #1b1e24; color: #fff; }
.btn-lime { box-shadow: none; }
.btn-ghost { background: transparent; border: 1px solid #e6e8ec; }
.btn:hover { box-shadow: 0 5px 15px #20241e12; }
.aud-switch { position: relative; display: inline-grid; grid-template-columns: repeat(2, 1fr); gap: 0; padding: 4px; border-radius: 999px; isolation: isolate; }
.aud-switch::before { content: ''; position: absolute; top: 4px; bottom: 4px; left: 4px; width: calc((100% - 8px) / 2); background: var(--ink); border-radius: 999px; pointer-events: none; transition: transform .3s cubic-bezier(.22, 1, .36, 1); }
body[data-aud="academy"] .aud-switch::before { transform: translateX(100%); }
.aud-switch button { position: relative; z-index: 1; min-height: 36px; white-space: nowrap; font-weight: 800; transition: color .2s ease; }
.aud-switch button.on { background: transparent; box-shadow: none; color: var(--lime); }
.hero { padding: 72px 0 0; background: #f7f8f9; border-bottom: 1px solid #e6e8ec; position: relative; overflow: hidden; }
.hero { isolation: isolate; }
.hero::before, .hero::after { content: ''; display: block; position: absolute; pointer-events: none; z-index: -1; width: 72%; height: 90%; border-radius: 50%; will-change: transform; }
.hero::before { top: -18%; right: -8%; background: radial-gradient(ellipse, rgba(196,241,90,.36), rgba(196,241,90,.12) 45%, transparent 72%); animation: hero-glow-drift 12s ease-in-out -4s infinite alternate; }
.hero::after { left: -14%; bottom: -30%; background: radial-gradient(ellipse, rgba(167,190,235,.24), rgba(196,241,90,.10) 45%, transparent 72%); animation: hero-glow-drift 16s ease-in-out -9s infinite alternate-reverse; }
@keyframes hero-glow-drift { from { transform: translate3d(-12%, -6%, 0) scale(.94); } to { transform: translate3d(16%, 12%, 0) scale(1.12); } }
.hero .hero-grid2 { grid-template-columns: 1.02fr 1fr; gap: 64px; padding-bottom: 65px; align-items: center; }
.hero-copy { position: relative; z-index: 1; text-align: left; }
.hero-tag { display: flex; flex-direction: column; align-items: flex-start; gap: 13px; padding: 0; margin: 0 0 28px; border: 0; background: none; box-shadow: none; color: #5f6675; font-size: 13px; font-weight: 600; transform: none; }
.hero-tag b { color: #5f6675; font-family: 'Pretendard Variable', sans-serif; font-size: 11px; letter-spacing: .16em; background: none; padding: 0; border-radius: 0; }
.hero-hwrap { margin: 0; }
.hero h1, .hero .as-h1 { font-family: 'Pretendard Variable', sans-serif; font-size: clamp(38px,4.3vw,62px); font-weight: 820; line-height: 1.2; letter-spacing: -.065em; margin: 0; word-break: keep-all; }
.hero-highlight { position: relative; display: inline-block; background: #c4f15a; color: #1b1e24; padding: 2px 12px 6px; margin: 7px 0 0 -2px; border-radius: 12px; }
.hero-promise { margin: 28px 0 13px; font-size: 20px; font-weight: 730; letter-spacing: -.04em; line-height: 1.5; word-break: keep-all; }
.hero .sub { font-size: 16px; line-height: 1.85; color: #666d79; max-width: 540px; margin: 0; word-break: keep-all; }
.hero .sub b { color: #1b1e24; font-weight: 650; }
.hero-ctas { margin: 30px 0 0; display: flex; flex-wrap: wrap; gap: 10px; }
.hero-ctas .btn span { margin-left: 7px; }
.hero .hero-note { font-family: 'Pretendard Variable', sans-serif; font-size: 12px; color: #666d79; margin: 16px 0 0; line-height: 1.8; }
.writing-preview { position: relative; background: #f5f6f7; border: 1px solid #dfe2e6; border-radius: 18px; padding: 24px; isolation: isolate; scroll-margin-top: 100px; box-shadow: 0 24px 64px -30px #1b1e2438; }
.preview-orbit { display: none; }
.preview-orbit::before { content: ''; position: absolute; width: 440px; height: 440px; border: 1px solid #a5b994; border-radius: 50%; right: -135px; top: -45px; box-shadow: 0 0 0 40px #a5b99412, 0 0 0 80px #a5b9940b; }
.preview-coordinate { display: none; }
.preview-topline { display: flex; justify-content: space-between; align-items: center; font-size: 11px; letter-spacing: .025em; color: #5f6675; margin: -24px -24px 20px; padding: 19px 24px; background: #fff; border-bottom: 1px solid #e6e8ec; border-radius: 18px 18px 0 0; }
.preview-topline > span:first-child { display: flex; gap: 8px; align-items: center; font-weight: 800; }
.preview-topline i { width: 16px; height: 16px; background: #1b1e24; border-radius: 5px 5px 5px 1px; display: inline-block; position: relative; }
.preview-topline i::after { content: ''; position: absolute; width: 5px; height: 5px; right: 3px; bottom: 3px; background: #c4f15a; border-radius: 50%; }
.preview-tabs { display: grid; grid-template-columns: repeat(3,1fr); gap: 4px; margin-bottom: 16px; background: #e9ecf0; padding: 4px; border-radius: 10px; }
.preview-tabs button { padding: 11px 4px; background: transparent; color: #5f6675; border: 1px solid transparent; border-radius: 6px; font: 600 12px 'Pretendard Variable',sans-serif; cursor: pointer; min-height: 42px; }
.preview-tabs button.active { background: #fff; color: #1b1e24; box-shadow: 0 2px 6px #1b1e2410; }
.preview-tabs button:hover:not(.active) { background: #ffffff60; border-color: #dfe2e6; }
.preview-paper { position: relative; background: #ffffff; padding: 24px 24px 0; border: 1px solid #e6e8ec; border-radius: 14px; box-shadow: 0 4px 12px #1b1e2404; min-height: 298px; }
.preview-paper-head { display: flex; justify-content: space-between; gap: 8px; font-size: 10px; color: #767b85; line-height: 1.5; }
.preview-paper-head > span:first-child { color: #5f6675; font-weight: 750; letter-spacing: .08em; }
.preview-sentence { font-family: 'Pretendard Variable', sans-serif; font-size: clamp(20px,1.9vw,27px); font-weight: 650; line-height: 1.7; color: #1b1e24; letter-spacing: -.025em; margin: 23px 0 20px; min-height: 94px; }
.preview-sentence del { color: #c04d4d; text-decoration-color: #c04d4d; font-size: .83em; }
.preview-sentence mark { background: #e7f7c8; padding: 2px 6px; border-radius: 3px; color: #1b1e24; }
.preview-explanation { display: flex; align-items: flex-start; gap: 12px; background: #f6fde8; border-left: 2px solid #c4f15a; padding: 15px; border-radius: 0 6px 6px 0; min-height: 102px; }
.preview-plus { display: grid; place-items: center; flex: 0 0 24px; height: 24px; color: #1b1e24; background: #c4f15a; border-radius: 50%; font-size: 17px; }
.preview-explanation strong { font-size: 13px; color: #1b1e24; }
.preview-explanation p { font-size: 12px; color: #5f6675; line-height: 1.8; margin: 6px 0 0; }
.preview-paper-foot { display: flex; align-items: center; justify-content: space-between; padding: 17px 0; color: #767b85; font-size: 10px; }
.preview-paper-foot > span:last-child { font-size: 21px; color: #7aab20; }
.preview-output { display: flex; align-items: center; gap: 15px; margin: 14px 0 0; padding: 18px; background: #1b1e24; border-radius: 14px; color: white; }
.preview-file-icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; background: #ffffff14; color: #c4f15a; flex-shrink: 0; }
.preview-file-icon svg { width: 23px; height: 23px; }
.preview-output strong { font-size: 14px; font-weight: 650; }
.preview-output p { margin: 6px 0 0; color: #b8bfcc; font-size: 11px; }
.preview-output > a { margin-left: auto; flex: 0 0 40px; height: 40px; display: grid; place-items: center; background: #c4f15a; color: #1b1e24; font-size: 23px; border-radius: 50%; }
.sheet-stack { position: relative; width: 32px; height: 37px; flex-shrink: 0; }
.sheet-stack i { position: absolute; width: 25px; height: 33px; background: #bbce9e; border: 1px solid #1b1e24; border-radius: 2px; top: 0; left: 0; transform: rotate(-12deg); }
.sheet-stack i:nth-child(2) { left: 4px; top: 2px; background: #d5e4bc; transform: rotate(4deg); }
.sheet-stack i:nth-child(3) { left: 8px; top: 4px; background: #f3f8e9; color: #51683a; transform: rotate(13deg); display: grid; place-items: center; font-style: normal; }
.preview-caption { text-align: center; font-size: 10px; color: #767b85; margin: 19px -10px -8px; line-height: 1.6; }
.benefit-strip { border-top: 1px solid #e6e8ec; display: grid; grid-template-columns: repeat(3,1fr); padding: 28px 0 32px; }
.benefit-strip > div { padding-left: 32px; border-left: 1px solid #e6e8ec; }
.benefit-strip > div:first-child { padding-left: 0; border-left: 0; }
.benefit-strip span { display: block; font-size: 10px; letter-spacing: .1em; color: #767b85; margin-bottom: 11px; font-weight: 650; }
.benefit-strip strong { font-size: 19px; letter-spacing: -.035em; }
.benefit-strip p { margin: 7px 0 0; font-size: 13px; color: #666d79; }
.sec-head h2, .sub-main .sec-head h1 { font-family: 'Pretendard Variable',sans-serif; line-height: 1.3; font-weight: 760; }
.sec-head .sub { font-size: 16px; line-height: 1.8; }
.reveal { opacity: 1; transform: none; }
.sub-main { padding-top: 36px !important; }
.sub-main > section:first-child { padding-top: 64px; }
.mobile-menu { display: none; }
.tour-controls { display: flex; justify-content: center; align-items: center; gap: 24px; margin: 12px auto; }
.tour-controls button { font: 600 13px 'Pretendard Variable',sans-serif; background: #ffffff; color: #1b1e24; border: 1px solid #e6e8ec; border-radius: 7px; min-height: 44px; padding: 11px 17px; cursor: pointer; }
.tour-controls button:hover { background: #f6fde8; }
.tour-controls span { color: #666d79; font-size: 12px; }
.price .bill-row { position: relative; flex-direction: row; width: max-content; margin: 2px auto 48px; gap: 0; }
.price .bill-switch { margin: 0; }
.price .bill-save { position: absolute; left: calc(100% + 16px); top: 50%; transform: translateY(-50%); white-space: nowrap; }
.connected-learning { background: #fff; border-bottom: 1px solid #e6e8ec; }
.connected-learning .sec-head { max-width: 760px; }
.connected-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.connected-grid article { display: flex; flex-direction: column; padding: 28px; background: #f7f8f9; border: 1px solid #e6e8ec; border-radius: 16px; }
.connected-label { color: #5f6675; font-size: 11px; letter-spacing: .06em; font-weight: 750; }
.connected-grid h3 { font-size: 23px; line-height: 1.5; letter-spacing: -.04em; margin: 20px 0 14px; color: #1b1e24; word-break: keep-all; }
.connected-grid p { font-size: 15px; line-height: 1.9; color: #5f6675; margin: 0 0 24px; word-break: keep-all; }
.connected-grid a { color: #1b1e24; font-size: 13px; font-weight: 700; margin-top: auto; padding: 12px 0 0; border-top: 1px solid #e6e8ec; min-height: 44px; }
.connected-grid a span { float: right; }
.connected-grid a:hover { color: #4b711a; }
.connected-summary { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 26px; margin: 24px 0 0; background: #1b1e24; color: #c4f15a; border-radius: 16px; line-height: 1.8; text-align: center; word-break: keep-all; }
.connected-summary b { font-size: 16px; font-weight: 650; }
.connected-summary span { color: #d0d4dc; font-size: 14px; }
@media(max-width:900px) { .connected-grid { grid-template-columns: 1fr; gap: 14px; } .connected-grid article { padding: 24px; } .connected-grid h3 br { display: none; } }
@media(max-width:600px) { .price .bill-row { flex-direction: column; gap: 12px; } .price .bill-save { position: static; transform: none; } .connected-summary { padding: 20px; } .connected-summary b { font-size: 14px; } .connected-summary span { font-size: 12px; } }
@media(min-width:901px) and (max-width:1180px) { .nav-links { gap: 14px; } .nav-cta > .btn-ghost { display: none; } .hero .hero-grid2 { gap: 32px; } .hero-ctas .btn { padding: 14px 16px; font-size: 14px; } }
@media(max-width:1050px) { .nav-links { display: none; } .mobile-menu { display: block; position: relative; } .mobile-menu summary { list-style: none; min-height: 44px; padding: 12px; cursor: pointer; font-size: 13px; font-weight: 700; } .mobile-menu summary::-webkit-details-marker { display: none; } .mobile-menu nav { position: absolute; right: 0; top: 50px; min-width: 200px; display: grid; padding: 8px; background: #ffffff; border: 1px solid #e6e8ec; border-radius: 9px; box-shadow: 0 12px 30px #20241e1c; } .mobile-menu nav a { padding: 13px; font-size: 14px; border-radius: 5px; } .mobile-menu nav a:hover { background: #f5f6f7; } }
@media(max-width:900px) {
 .wrap { width: calc(100% - 40px); }
 .nav { height: 68px; gap: 12px; }
 .nav-cta { margin-left: auto; }
 .nav-cta > .btn-lime, .nav-cta > .btn-ink { display: inline-flex; }
 .hero { padding-top: 45px; }
 .hero .hero-grid2 { grid-template-columns: 1fr; gap: 49px; padding-bottom: 36px; }
 .hero-copy { max-width: 620px; }
 .hero h1, .hero .as-h1 { font-size: clamp(39px,7.5vw,60px); }
 .hero-tag { margin-bottom: 23px; }
 .writing-preview { max-width: 610px; width: 100%; margin: 0 auto; box-sizing: border-box; }
 .preview-sentence { font-size: 30px; }
 .benefit-strip strong { font-size: 16px; }
 .benefit-strip > div { padding-left: 20px; }
 .benefit-strip p { font-size: 12px; }
 section { padding: 72px 0; }
}
@media(max-width:600px) {
 .nav { flex-wrap: nowrap; height: 64px; gap: 3px; }
 .logo { font-size: 13px; gap: 6px; }
 .logo i { width: 21px; height: 21px; }
 .nav-cta { gap: 3px; }
 .nav-cta > .btn-ghost, .nav-cta .aud-switch { display: none; }
 .nav-cta > .btn { padding: 9px 10px; font-size: 11px; min-height: 38px; }
 .mobile-menu summary { font-size: 12px; padding: 13px 7px; }
 .hero { padding-top: 35px; }
 .hero .hero-grid2 { gap: 44px; }
 .hero-tag { font-size: 12px; gap: 11px; }
 .hero-tag b { font-size: 10px; }
 .hero h1, .hero .as-h1 { font-size: clamp(36px,9vw,51px); letter-spacing: -.065em; }
 .hero-promise { font-size: 16px; margin-top: 23px; }
 .hero .sub { font-size: 14px; line-height: 1.85; }
 .desktop-br { display: none; }
 .hero-ctas { gap: 9px; margin-top: 23px; }
 .hero-ctas .btn { flex: 1 1 100%; font-size: 14px; min-height: 49px; padding: 12px; }
 .hero-note { text-align: center; }
 .writing-preview { padding: 18px; border-radius: 12px; }
 .preview-topline { font-size: 9px; margin: -18px -18px 16px; padding: 16px 18px; border-radius: 12px 12px 0 0; }
 .preview-tabs button { font-size: 11px; }
 .preview-paper { padding: 19px 18px 0; }
 .preview-paper-head { font-size: 8px; }
 .preview-sentence { font-size: clamp(20px,5.6vw,27px); margin: 23px 0 17px; min-height: 76px; }
 .preview-explanation { padding: 12px 10px; gap: 8px; }
 .preview-explanation strong { font-size: 12px; }
 .preview-explanation p { font-size: 11px; }
 .preview-output { margin-left: 0; margin-right: 0; padding: 14px; gap: 12px; }
 .preview-output strong { font-size: 12px; }
 .preview-output p { font-size: 10px; }
 .preview-caption { font-size: 9px; }
 .benefit-strip { grid-template-columns: 1fr; gap: 18px; padding: 25px 0; }
 .benefit-strip > div, .benefit-strip > div:first-child { border-left: 0; padding-left: 0; display: grid; grid-template-columns: 105px 1fr; align-items: center; gap: 4px 8px; }
 .benefit-strip span { grid-row: span 2; margin: 0; font-size: 9px; }
 .benefit-strip strong { font-size: 16px; }
 .benefit-strip p { margin: 0; font-size: 12px; }
 .sub-main > section:first-child { padding-top: 32px; }
}
@media(prefers-reduced-motion:reduce) { html { scroll-behavior: auto !important; } *, *::before, *::after { animation: none !important; transition: none !important; } }