:root { color-scheme: light; --ink: #172337; --muted: #5a6576; --blue: #1748cf; --line: #dfe4ed; --soft: #f4f6fa; --radius: 12px; font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif; color: var(--ink); background: #fff; font-synthesis: none; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; font-size: 16px; line-height: 1.7; word-break: keep-all; overflow-wrap: anywhere; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid #ffae32; outline-offset: 5px; }
button:disabled { cursor: default; }
img { max-width: 100%; object-fit: contain; }
h1, h2, h3, h4, p, figure { margin: 0; }
h1, h2, h3, h4 { line-height: 1.35; }
[hidden] { display: none !important; }
html:not(.js) .feature-buttons { display: none; }
html:not(.js) [data-panel][hidden] { display: grid !important; margin-top: 24px; }
.shell { width: min(1180px, calc(100% - 80px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 12px; background: #fff; border: 2px solid var(--blue); transform: translateY(-180%); }
.skip-link:focus { transform: none; }
.site-header { position: sticky; top: 0; z-index: 20; background: #fff; border-bottom: 1px solid var(--line); }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 7px; flex-shrink: 0; font-size: 23px; font-weight: 800; letter-spacing: -1px; }
.brand img { flex-shrink: 0; }
.site-nav { display: flex; align-items: center; gap: 32px; font-size: 14px; font-weight: 600; }
.site-nav a:hover, .text-link:hover, .site-footer a:hover { color: var(--blue); }
.menu-toggle { background: #fff; border: 1px solid var(--line); padding: 8px 12px; border-radius: 6px; color: var(--ink); }
.hero { display: grid; grid-template-columns: .92fr 1.08fr; align-items: center; gap: 44px; padding-block: 96px 80px; }
.eyebrow { font-size: 14px; letter-spacing: -.2px; font-weight: 700; color: var(--blue); margin-bottom: 22px; }
.small-dot { display: inline-block; width: 7px; height: 7px; background: #efad2e; border-radius: 50%; vertical-align: 2px; margin-right: 7px; }
h1 { font-size: clamp(42px, 4.2vw, 62px); letter-spacing: -3px; line-height: 1.23; font-weight: 800; }
.hero-description { color: var(--muted); margin-top: 28px; font-size: 18px; line-height: 1.9; letter-spacing: -.4px; }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; margin-top: 34px; }
.button { display: inline-flex; justify-content: space-between; align-items: center; gap: 26px; min-height: 54px; padding: 14px 23px; border-radius: 7px; font-weight: 700; font-size: 15px; transition: background .18s, color .18s; }
.primary { color: white; background: var(--blue); }
.primary:hover { background: #123ba9; }
.white { background: white; color: var(--blue); }
.white:hover { background: #e8edff; }
.text-link { display: inline-flex; align-items: center; gap: 14px; font-size: 14px; font-weight: 700; padding-block: 9px; }
.hero-note { margin-top: 20px; font-size: 13px; color: #697486; }
.hero-product { min-width: 0; padding-top: 20px; }
.product-window { background: #fff; border: 1px solid #d3dbe8; border-radius: 12px; overflow: hidden; box-shadow: 0 14px 46px #142c5710; }
.window-top { padding: 16px 18px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.window-top > span { display: flex; align-items: center; gap: 10px; }
.window-brand { color: var(--blue); font-weight: 800; font-size: 14px; }
.avatar { width: 25px; height: 25px; border-radius: 50%; display: inline-grid; place-items: center; background: #e8edfa; font-weight: 700; color: var(--blue); }
.window-body { display: grid; grid-template-columns: 94px 1fr; }
.mock-sidebar { border-right: 1px solid var(--line); padding: 23px 8px; font-size: 12px; color: #657083; display: flex; flex-direction: column; gap: 12px; }
.mock-sidebar > span { padding: 6px; }
.mock-sidebar .selected { background: #eaf0ff; border-radius: 5px; color: var(--blue); font-weight: 700; }
.mock-main { padding: 20px 14px 0; min-width: 0; }
.mock-heading { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 15px; }
.mock-label { background: #eef3ff; color: var(--blue); border: 1px solid #cedbff; font-size: 12px; border-radius: 4px; padding: 1px 8px; }
.mock-date { font-weight: 600; font-size: 12px; margin: 18px 0 12px; display: flex; justify-content: space-between; }
.mock-date > span { color: #697486; font-weight: 400; }
.calendar { display: grid; grid-template-columns: 38px repeat(3, minmax(0, 1fr)); grid-template-rows: 42px repeat(3, 94px); }
.day { display: flex; align-items: center; justify-content: center; gap: 6px; font-size: 12px; border-bottom: 1px solid var(--line); }
.day b { font-size: 14px; }
.day.current { color: var(--blue); }
.time { padding-top: 5px; font-size: 12px; color: #697486; }
.slot { padding: 4px; border-right: 1px solid #edf0f5; border-bottom: 1px solid #edf0f5; }
.lesson { height: 100%; padding: 7px 6px; border-left: 2px solid; border-radius: 4px; font-size: 12px; display: flex; flex-direction: column; gap: 2px; line-height: 1.6; }
.lesson small { font-size: 12px; opacity: .9; }
.blue { background: #eaf0ff; color: #264a9b; border-color: #6790ef; }
.green { background: #eaf5f1; color: #296249; border-color: #7abca3; }
.orange { background: #fff1df; color: #83521b; border-color: #d4a353; }
.neutral { background: #f1f3f6; color: #5f6978; }
.window-foot { background: #f8fafc; border-top: 1px solid var(--line); font-size: 12px; padding: 11px 18px; display: flex; align-items: center; gap: 7px; }
.status-dot { height: 6px; width: 6px; border-radius: 50%; background: #347861; }
.preview-caption, figcaption { text-align: right; font-size: 12px; color: #687486; margin-top: 12px; }
.product-caption { display: flex; justify-content: space-between; gap: 16px; padding-top: 24px; margin-top: 14px; border-top: 1px solid var(--line); font-size: 13px; font-weight: 600; }
.product-caption > span:last-child { color: var(--blue); }
.flow-strip { border-block: 1px solid var(--line); background: #fafbfe; }
.flow-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding-block: 28px; }
.flow-inner > p { font-size: 14px; color: var(--muted); line-height: 1.65; }
.flow-inner strong { color: var(--ink); }
.flow-inner ol { display: flex; list-style: none; padding: 0; margin: 0; gap: 34px; font-size: 16px; font-weight: 600; }
.flow-inner li:not(:last-child)::after { content: '→'; margin-left: 34px; font-weight: 400; color: #8995a8; }
.section { padding-block: 100px; }
h2 { font-size: clamp(30px, 3vw, 42px); letter-spacing: -1.7px; line-height: 1.4; font-weight: 750; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 42px; }
.section-heading .eyebrow, .parent-copy .eyebrow { margin-bottom: 14px; }
.section-heading > p { font-size: 16px; color: var(--muted); line-height: 1.9; padding-bottom: 5px; }
.feature-buttons { display: flex; gap: 12px; margin-bottom: 24px; }
.feature-buttons button { background: white; border: 1px solid #d7dfea; border-radius: 7px; padding: 12px 22px; font-size: 14px; color: var(--muted); display: inline-flex; gap: 12px; align-items: center; }
.feature-buttons button span { font-weight: 600; }
.feature-buttons button[aria-pressed="true"] { background: var(--blue); color: #fff; border-color: var(--blue); }
.feature-buttons button:hover { border-color: var(--blue); }
.feature-panel { display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; border: 1px solid var(--line); border-radius: var(--radius); padding: 46px; }
.section-number { color: var(--blue); font-size: 13px; font-weight: 700; }
.feature-copy h3 { font-size: 29px; letter-spacing: -1px; margin: 17px 0 20px; }
.feature-copy > p { color: var(--muted); line-height: 1.9; font-size: 16px; }
.check-list { list-style: none; margin: 22px 0; padding: 0; font-size: 14px; }
.check-list li { margin-top: 10px; padding-left: 21px; position: relative; }
.check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--blue); font-weight: 700; }
.feature-visual { min-width: 0; align-self: center; }
.sheet { border: 1px solid #e1e6ef; border-radius: 9px; background: white; box-shadow: 0 7px 30px #16366308; padding: 25px; }
.sheet-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-bottom: 22px; }
.sheet-kicker { font-size: 12px; color: var(--muted); }
.sheet-head h4 { margin-top: 6px; font-size: 21px; letter-spacing: -.6px; }
.pill { display: inline-block; font-size: 12px; line-height: 1.6; border-radius: 4px; padding: 4px 9px; font-weight: 500; white-space: nowrap; }
.roster-header { display: flex; justify-content: space-between; padding: 11px 0; border-block: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.roster { list-style: none; margin: 0; padding: 0; }
.roster li { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 11px 0; border-bottom: 1px solid #edf0f5; font-size: 14px; }
.roster li > span:first-child { display: flex; align-items: center; gap: 11px; }
.initial { display: grid; place-items: center; width: 30px; height: 30px; background: var(--soft); border-radius: 50%; color: #66778e; font-size: 12px; }
.sheet-note { color: #6a7483; font-size: 12px; padding-top: 18px; }
.report-subject { display: flex; justify-content: space-between; border-block: 1px solid var(--line); padding: 12px 0; font-size: 13px; }
.report-subject > span { color: var(--muted); }
.report-block { margin-top: 20px; }
.report-block > span { font-size: 12px; color: #67768a; }
.report-block > p { font-size: 14px; margin-top: 7px; line-height: 1.8; }
.report-homework { background: var(--soft); padding: 13px; margin-top: 22px; border-radius: 5px; display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
.makeup-timeline { list-style: none; padding: 0; margin: 2px 0 0; }
.makeup-timeline li { display: flex; gap: 16px; padding: 20px 0; border-top: 1px solid var(--line); }
.makeup-timeline li > span { color: var(--blue); font-size: 13px; font-weight: 700; }
.makeup-timeline b { font-size: 15px; }
.makeup-timeline p { font-size: 13px; color: var(--muted); margin-top: 4px; }
.parent-section { background: #f2f5fa; padding-block: 84px; }
.parent-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; align-items: center; }
.parent-preview { width: 340px; max-width: 100%; justify-self: center; }
.phone-sheet { border: 1px solid #d2dbe9; border-radius: 24px; background: #fff; overflow: hidden; box-shadow: 0 14px 28px #16264009; }
.phone-brand { padding: 19px 22px; display: flex; align-items: center; gap: 3px; border-bottom: 1px solid var(--line); font-size: 15px; }
.phone-brand > span { margin-left: auto; font-size: 12px; color: var(--muted); }
.phone-body { padding: 25px 23px 0; }
.phone-body h3 { font-size: 23px; letter-spacing: -.8px; margin-top: 6px; }
.phone-subtitle { font-size: 13px; color: var(--muted); margin-top: 7px; }
.child-schedule { margin-top: 24px; background: #eff4ff; border: 1px solid #dce6ff; border-radius: 8px; padding: 16px; }
.child-schedule > span { font-size: 12px; color: #536b99; }
.child-schedule > b { display: block; margin-top: 5px; font-size: 16px; }
.child-schedule > p { display: flex; justify-content: space-between; align-items: center; font-size: 13px; margin-top: 9px; }
.phone-row { display: flex; align-items: center; gap: 10px; padding-block: 20px; border-bottom: 1px solid #edf0f5; }
.phone-icon { background: #f2f4f8; color: #51617b; border-radius: 7px; width: 36px; height: 36px; display: grid; place-items: center; flex-shrink: 0; font-size: 12px; }
.phone-row b { font-size: 14px; }
.phone-row p { font-size: 12px; color: #677588; margin-top: 3px; }
.phone-row > span:last-child { margin-left: auto; color: #8490a3; }
.phone-bottom { padding: 18px 0; font-size: 12px; color: #65748a; text-align: center; }
.section-description { margin-top: 24px; color: var(--muted); font-size: 17px; line-height: 1.9; }
.parent-point { margin-top: 27px; padding-top: 22px; border-top: 1px solid #d6deea; }
.parent-point > b { font-size: 16px; }
.parent-point > p { margin-top: 7px; color: var(--muted); font-size: 14px; max-width: 410px; }
.parent-copy > .text-link { margin-top: 24px; }
.operations-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: 40px; }
.operations-grid > article { border-top: 1px solid var(--line); padding: 28px 0 36px; }
.operation-index { font-size: 12px; color: var(--blue); font-weight: 700; }
.operations-grid h3 { margin-top: 15px; font-size: 21px; letter-spacing: -.6px; display: flex; justify-content: space-between; }
.operations-grid p { font-size: 15px; color: var(--muted); margin-top: 13px; line-height: 1.85; max-width: 320px; }
.start-section { background: #fafbfc; border-block: 1px solid var(--line); }
.start-steps { list-style: none; padding: 0; margin: 0 0 30px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 50px; }
.start-steps li { border-top: 2px solid #cdd7ea; padding-top: 24px; }
.start-steps li > span { font-size: 14px; color: var(--blue); font-weight: 700; }
.start-steps h3 { font-size: 20px; margin-top: 14px; letter-spacing: -.5px; }
.start-steps p { font-size: 15px; color: var(--muted); margin-top: 13px; line-height: 1.9; }
.faq-layout { display: grid; grid-template-columns: .8fr 1.4fr; gap: 70px; }
.faq-layout > div > .text-link { margin-top: 18px; }
.faq-list { border-top: 1px solid var(--ink); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { list-style: none; font-size: 16px; font-weight: 600; padding: 23px 0; cursor: pointer; display: flex; justify-content: space-between; gap: 20px; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary > span { font-size: 21px; font-weight: 400; color: #778498; }
.faq-list details[open] summary > span { transform: rotate(45deg); }
.faq-list details p { color: var(--muted); font-size: 15px; line-height: 1.9; padding: 0 30px 25px 0; }
.faq-list details a { text-decoration: underline; text-underline-offset: 4px; color: var(--blue); }
.closing { background: #1745bb; color: #fff; }
.closing-inner { padding-block: 62px; display: flex; justify-content: space-between; align-items: center; gap: 30px; }
.closing p { font-size: 15px; color: #d8e3ff; margin-bottom: 10px; }
.closing h2 { font-size: 32px; letter-spacing: -1px; }
.closing .button { flex-shrink: 0; }
.site-footer { padding-block: 45px 30px; }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.footer-top .brand { font-size: 20px; }
.footer-top nav { display: flex; flex-wrap: wrap; gap: 24px; font-size: 13px; color: #58677c; }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 24px; margin-top: 28px; display: flex; justify-content: space-between; gap: 20px; font-size: 12px; color: #687486; }
@media (max-width: 1100px) {
  .shell { width: calc(100% - 48px); }
  .site-nav { gap: 20px; }
  .hero { gap: 25px; padding-block: 68px; }
  .window-body { grid-template-columns: 1fr; }
  .mock-sidebar { display: none; }
  .hero-description { font-size: 17px; }
  .actions { gap: 14px; }
  .flow-inner ol { gap: 20px; font-size: 14px; }
  .flow-inner li:not(:last-child)::after { margin-left: 20px; }
  .feature-panel { padding: 32px; gap: 36px; }
  .parent-layout { gap: 54px; }
}
@media (max-width: 800px) {
  .header-inner { min-height: 74px; flex-wrap: wrap; gap: 0; }
  .brand { font-size: 21px; }
  .menu-toggle:not([hidden]) { display: block; }
  .site-nav { width: 100%; flex-wrap: wrap; gap: 10px 24px; padding-block: 15px; }
  .js .site-nav:not(.is-open) { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 54px; gap: 38px; }
  h1 { font-size: 54px; }
  .hero-product { max-width: 600px; width: 100%; justify-self: center; padding-top: 0; }
  .window-body { grid-template-columns: 94px 1fr; }
  .mock-sidebar { display: flex; }
  .flow-inner { align-items: flex-start; flex-direction: column; gap: 18px; }
  .flow-inner > p br { display: none; }
  .flow-inner ol { flex-wrap: wrap; gap: 10px 18px; }
  .flow-inner li:not(:last-child)::after { margin-left: 18px; }
  .section { padding-block: 65px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 22px; margin-bottom: 30px; }
  .feature-panel { grid-template-columns: 1fr; gap: 30px; }
  .feature-buttons { gap: 8px; flex-wrap: wrap; }
  .feature-buttons button { padding: 10px 15px; gap: 8px; }
  .feature-copy h3 br { display: none; }
  .feature-visual { width: 100%; max-width: 520px; justify-self: center; }
  .parent-layout { grid-template-columns: 1fr; gap: 40px; }
  .parent-copy { grid-row: 1; }
  .parent-point > p { max-width: none; }
  .parent-section { padding-block: 62px; }
  .operations-grid { grid-template-columns: repeat(2, 1fr); gap: 0 30px; }
  .start-steps { gap: 24px; }
  .start-steps h3 { font-size: 18px; }
  .start-steps p br { display: none; }
  .faq-layout { grid-template-columns: 1fr; gap: 30px; }
  .faq-layout h2 br { display: none; }
  .closing-inner { flex-direction: column; align-items: flex-start; }
  .footer-top { flex-direction: column; align-items: flex-start; }
  .footer-bottom { flex-direction: column; gap: 6px; }
}
@media (min-width: 801px) { .menu-toggle { display: none !important; } }
@media (max-width: 480px) {
  .shell { width: calc(100% - 40px); }
  h1 { font-size: 44px; letter-spacing: -2px; }
  h2 { font-size: 30px; }
  .eyebrow { font-size: 13px; }
  .hero-description { font-size: 16px; }
  .actions { align-items: flex-start; flex-direction: column; gap: 8px; }
  .hero { padding-bottom: 40px; }
  .hero-note { font-size: 12px; margin-top: 14px; }
  .window-body { grid-template-columns: 1fr; }
  .mock-sidebar { display: none; }
  .mock-main { padding: 18px 10px 0; }
  .calendar { grid-template-columns: 36px repeat(3, minmax(0, 1fr)); grid-template-rows: 38px repeat(3, 106px); }
  .lesson { padding: 6px 3px; }
  .slot { padding: 3px; }
  .lesson small { display: none; }
  .product-caption { font-size: 12px; gap: 8px; }
  .flow-inner ol { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 22px; }
  .flow-inner li:not(:last-child)::after { content: none; }
  .feature-buttons button { font-size: 13px; padding: 9px 12px; }
  .feature-panel { padding: 23px 18px; }
  .feature-copy h3 { font-size: 26px; }
  .sheet { padding: 18px; }
  .sheet-head { flex-wrap: wrap; }
  .sheet-head h4 { font-size: 19px; }
  .preview-caption, figcaption { text-align: left; }
  .section-description { font-size: 16px; }
  .operations-grid { grid-template-columns: 1fr; }
  .operations-grid > article { padding-block: 21px 27px; }
  .operations-grid h3 { margin-top: 8px; }
  .operations-grid p { max-width: none; }
  .start-steps { grid-template-columns: 1fr; gap: 28px; }
  .closing h2 { font-size: 28px; }
  .footer-top nav { gap: 13px 22px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; } }