:root {
  --paper: #F7F5EE;
  --grid: rgba(31, 110, 92, .10);
  --ink: #33302A;
  --ink-soft: #7A7161;
  --leaf: #1F6E5C;
  --leaf-deep: #134E42;
  --leaf-pale: #DDEDE4;
  --sun: #F2992E;
  --sun-pale: #FDEBCB;
  --coral: #E4695E;
  --sky: #4E9BB8;
  --night: #2E4057;
  --card: #FFFFFF;
  --line: #E3DCCB;
  --shadow: 0 18px 40px -18px rgba(46, 64, 87, .35);
  --display: "Jua", "Apple SD Gothic Neo", sans-serif;
  --body: "Gowun Dodum", "Apple SD Gothic Neo", sans-serif;
  color-scheme: light;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background-color: var(--paper); color: var(--ink);
  background-image: radial-gradient(rgba(31, 110, 92, .14) 1.4px, transparent 1.4px),
    radial-gradient(rgba(242, 153, 46, .12) 1.1px, transparent 1.1px);
  background-size: 30px 30px, 46px 46px;
  background-position: 0 0, 12px 18px;
  font: 17px/1.75 var(--body); word-break: keep-all; overflow-x: hidden;
}
h1, h2, h3 { font-family: var(--display); font-weight: 400; line-height: 1.3; margin: 0; }
p { margin: 0; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--sun); outline-offset: 3px; border-radius: 6px; }
.wrap { width: min(1120px, 100%); margin-inline: auto; padding-inline: 20px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--leaf); color: #fff; padding: 8px 14px; border-radius: 10px; }
.skip:focus { left: 8px; z-index: 99; }
.eyebrow { font-family: var(--display); color: var(--leaf); letter-spacing: .06em; font-size: 15px; margin: 0 0 8px; }
.lead { color: var(--ink-soft); font-size: 18px; max-width: 36em; margin-top: 12px; }
.tag { display: inline-block; font-family: var(--display); font-size: 14px; padding: 3px 12px; border-radius: 999px; background: var(--leaf-pale); color: var(--leaf-deep); }
.tag.sun { background: var(--sun-pale); color: var(--ink); }
.tag.coral { background: #F9DED8; color: var(--ink); }
.bar { position: sticky; top: 0; z-index: 20; background: rgba(247, 245, 238, .92); border-bottom: 1px solid var(--line); backdrop-filter: blur(10px); }
.bar-in { display: flex; align-items: center; gap: 18px; padding-block: 10px; }
.logo { display: flex; align-items: center; gap: 8px; font-family: var(--display); font-size: 20px; text-decoration: none; }
.logo svg { width: 26px; height: 26px; }
.bar nav { display: flex; gap: 4px; margin-left: auto; overflow-x: auto; }
.bar nav a { font-family: var(--display); font-size: 15px; text-decoration: none; padding: 6px 12px; border-radius: 999px; color: var(--ink-soft); white-space: nowrap; }
.bar nav a:hover { background: var(--leaf-pale); color: var(--leaf-deep); }
.hero { padding-block: 48px 24px; }
.showcase { border-radius: 26px; border: 1px solid var(--line); background: linear-gradient(135deg, #123B33 0%, #1F6E5C 52%, #2E4057 100%); color: #FFFDF4; box-shadow: var(--shadow); overflow: hidden; padding: clamp(24px, 4vw, 44px); position: relative; }
.showcase::after { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255, 255, 255, .28) 1.3px, transparent 1.3px); background-size: 26px 26px; pointer-events: none; }
.showcase > * { position: relative; z-index: 1; }
.showcase .eyebrow { color: #FFD9A0; }
.showcase h1 { font-size: clamp(38px, 6vw, 72px); }
.showcase h1 .swap { display: block; font-size: .42em; color: #D8E8DF; margin-bottom: 10px; }
.showcase .lead { color: #EDE7D6; }
.quickdock { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.quickdock button { font-family: var(--display); font-size: 16px; border-radius: 999px; padding: 10px 18px; border: 1px solid rgba(255, 255, 255, .55); background: rgba(255, 255, 255, .12); color: #fff; cursor: pointer; }
.quickdock button:hover { background: rgba(255, 255, 255, .24); }
.facts { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.facts span { font-family: var(--display); font-size: 16px; padding: 8px 16px; border-radius: 12px; background: rgba(255, 255, 255, .94); border: 1px solid var(--line); color: var(--ink); }
.facts b { color: var(--leaf); font-weight: 400; margin-right: 4px; }
.play-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 24px; }
.play-btn { display: inline-flex; align-items: center; gap: 10px; font-family: var(--display); font-size: 20px; text-decoration: none; padding: 14px 26px; border-radius: 16px; background: var(--sun); color: #3A2A12; box-shadow: 0 6px 0 #B86A14; }
.man-btn { font-family: var(--display); font-size: 18px; padding: 12px 22px; border-radius: 16px; border: 1px solid var(--line); background: var(--card); cursor: pointer; }
.hero-art { border-radius: 22px; border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); overflow: hidden; padding: 12px; }
.hero-art svg { width: 100%; height: auto; display: block; border-radius: 14px; }
#heroImg { width: 100%; height: auto; display: block; border-radius: 14px; }
.art-note { font-size: 14px; color: var(--ink-soft); margin: 8px 4px 2px; }
section.wrap { padding-block: 44px; }
.head { max-width: 720px; margin-bottom: 22px; }
.head h2 { font-size: clamp(28px, 4vw, 44px); }
.how { display: grid; gap: 12px; grid-template-columns: 1fr; padding: 0; list-style: none; margin: 18px 0 8px; counter-reset: step; }
@media (min-width: 760px) { .how { grid-template-columns: repeat(3, 1fr); } }
.how li { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 16px 18px 16px 64px; position: relative; }
.how li::before { counter-increment: step; content: counter(step); position: absolute; left: 16px; top: 16px; width: 34px; height: 34px; border-radius: 50%; background: var(--night); color: #fff; display: grid; place-items: center; font-family: var(--display); font-size: 18px; }
.how b { font-family: var(--display); font-weight: 400; font-size: 19px; display: block; margin-bottom: 4px; }
.family { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin: 28px 0 14px; }
.family h3 { font-size: 24px; }
.family p { color: var(--ink-soft); font-size: 15px; margin: 0; }
.doors { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .doors { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1080px) { .doors { grid-template-columns: 1fr 1fr 1fr; } }
.door { background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 20px 20px 18px 20px; box-shadow: var(--shadow); border-left: 10px solid var(--g, var(--leaf)); }
.g1 { --g: #E4695E; } .g2 { --g: #7A6FC0; } .g3 { --g: #1F6E5C; }
.g4 { --g: #4E9BB8; } .g5 { --g: #B87A1B; } .g6 { --g: #2E4057; }
.door-top { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.grade { font-family: var(--display); font-size: 20px; display: inline-flex; align-items: center; gap: 8px; }
.grade b { font-size: 26px; font-weight: 400; width: 44px; height: 44px; border-radius: 50%; background: var(--g, var(--leaf)); color: #fff; display: grid; place-items: center; }
.sem, .count { font-size: 14px; color: var(--ink-soft); border: 1px solid var(--line); padding: 2px 10px; border-radius: 999px; }
.places { list-style: none; margin: 0 0 14px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.places li { display: inline-flex; gap: 6px; align-items: center; background: var(--paper); border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px 5px 5px; font-size: 14px; }
.places i { font-style: normal; font-family: var(--display); width: 24px; height: 24px; border-radius: 50%; background: var(--g, var(--leaf)); color: #fff; display: grid; place-items: center; flex-shrink: 0; font-size: 13px; }
.door-actions { display: flex; gap: 10px; }
.go { flex: 1; display: inline-flex; justify-content: center; align-items: center; gap: 6px; font-family: var(--display); font-size: 17px; text-decoration: none; background: var(--g, var(--leaf)); color: #fff; border-radius: 14px; padding: 10px 12px; border: none; cursor: pointer; }
.copy-link { font-family: var(--display); font-size: 15px; padding: 0 14px; border-radius: 14px; border: 1px solid var(--line); background: var(--paper); cursor: pointer; white-space: nowrap; }
.man-link { display: inline-block; margin-top: 10px; font-size: 14px; color: var(--ink-soft); }
.doors-note { color: var(--ink-soft); font-size: 14px; margin-top: 14px; }
.lower { border-radius: 28px; padding: 32px 24px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
@media (min-width: 900px) { .lower { padding: 44px 40px; } }
.diff { display: grid; gap: 12px; grid-template-columns: 1fr; margin-top: 18px; }
@media (min-width: 760px) { .diff { grid-template-columns: repeat(3, 1fr); } }
.diff div { background: var(--paper); border: 1px solid var(--line); border-radius: 18px; padding: 16px 18px; }
.diff b { font-family: var(--display); font-weight: 400; font-size: 19px; display: block; margin-bottom: 4px; }
.flow { display: grid; gap: 40px; margin-top: 10px; }
.row { display: grid; gap: 18px; grid-template-columns: 1fr; align-items: center; }
@media (min-width: 900px) { .row { grid-template-columns: 1fr 1fr; } .row.flip .media { order: 2; } }
.shot { border-radius: 14px; border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--card); overflow: hidden; padding: 18px; }
.town-art { font-family: var(--display); font-size: 22px; padding: 26px 18px; text-align: center; background: linear-gradient(180deg, var(--paper), var(--card)); }
.town-art span { display: block; font-family: var(--body); font-size: 15px; color: var(--ink-soft); margin-top: 6px; }
.town-art img, .lesson-art img { width: 100%; height: auto; display: block; border-radius: 12px; border: 1px solid var(--line); margin-bottom: 8px; }
.checks { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 8px; }
.checks li { padding-left: 28px; position: relative; }
.checks li::before { content: ""; position: absolute; left: 2px; top: 8px; width: 14px; height: 14px; border-radius: 50%; background: var(--leaf); }
.lesson-art { text-align: center; font-family: var(--display); font-size: 22px; }
.lesson-art span { display: block; font-family: var(--body); font-size: 15px; color: var(--ink-soft); margin-top: 6px; }
.tries { display: grid; gap: 10px; grid-template-columns: 1fr 1fr; margin-top: 14px; }
.try { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 10px 12px; }
.try small { display: block; color: var(--ink-soft); font-size: 13px; }
.try strong { font-family: var(--display); font-weight: 400; font-size: 19px; }
.loop { display: grid; gap: 18px; grid-template-columns: 1fr; align-items: center; }
@media (min-width: 900px) { .loop { grid-template-columns: 1fr 1fr; } }
.loop svg { width: 100%; height: auto; background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 10px; }
.cards { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .cards { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1080px) { .cards { grid-template-columns: 1fr 1fr 1fr; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 18px; box-shadow: var(--shadow); }
.card h3 { font-size: 22px; margin: 10px 0 6px; }
.card p { color: var(--ink-soft); font-size: 15px; }
.card .meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.g-chips { display: inline-flex; gap: 4px; }
.g-chips span { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-family: var(--display); font-size: 14px; }
.trust { display: grid; gap: 12px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .trust { grid-template-columns: 1fr 1fr; } }
.trust > div { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 18px; }
.trust .num { font-family: var(--display); font-size: 30px; color: var(--leaf); }
.trust h3 { font-size: 20px; margin: 6px 0; }
.closing { text-align: center; margin-top: 56px; background: var(--card); border: 1px solid var(--line); border-radius: 26px; padding: 34px 20px; box-shadow: var(--shadow); }
.closing h2 { font-size: clamp(28px, 4vw, 44px); }
.mini { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 18px; }
.mini button { font-family: var(--display); font-size: 16px; border: none; border-radius: 12px; padding: 10px 16px; background: var(--g, var(--leaf)); color: #fff; cursor: pointer; }
.pad-btn { font-family: var(--display); font-size: 18px; padding: 12px 20px; border-radius: 14px; background: var(--leaf); color: #fff; border: none; cursor: pointer; }
.row2 { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; align-items: center; }
.mail { font-family: monospace; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; }
.copy { font-family: var(--display); padding: 8px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--paper); cursor: pointer; }
.site-foot { border-top: 1px solid var(--line); padding-block: 26px 60px; color: var(--ink-soft); }
.site-foot .cols { display: grid; gap: 18px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .site-foot .cols { grid-template-columns: 1.2fr 1fr 1fr; } }
.brand { font-family: var(--display); color: var(--ink); font-size: 20px; }
.site-foot h2 { font-size: 16px; margin-bottom: 8px; color: var(--ink); }
.site-foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 15px; }
.site-foot a { text-decoration: none; }
.copy-line { margin-top: 18px; font-size: 14px; }
#historyBtn { position: fixed; right: 16px; bottom: 16px; z-index: 40; font-family: var(--display); font-size: 14px; padding: 10px 16px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); box-shadow: var(--shadow); cursor: pointer; }
dialog { position: relative; border: 1px solid var(--line); border-radius: 18px; padding: 22px; max-width: min(540px, 94vw); }
dialog::backdrop { background: rgba(46, 64, 87, .40); }
dialog h3 { font-size: 22px; margin-bottom: 10px; padding-right: 44px; }
dialog .dlg-x { position: absolute; top: 10px; right: 10px; width: 36px; height: 36px; margin: 0; padding: 0; border-radius: 50%; font-size: 17px; line-height: 1; display: grid; place-items: center; }
@media (prefers-reduced-motion: reduce) { dialog .dlg-x { transition: none; } }
dialog button { font-family: var(--display); margin-top: 12px; padding: 10px 18px; border-radius: 12px; border: 1px solid var(--line); background: var(--paper); cursor: pointer; }
.trial-card { margin-top: 14px; border: 1px solid var(--line); border-radius: 16px; padding: 14px; background: var(--paper); display: grid; gap: 10px; }
.trial-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.trial-svg svg { display: block; width: 100%; height: auto; border-radius: 12px; background: #fff; border: 1px solid var(--line); }
.trial-q { font-family: var(--display); font-size: 19px; line-height: 1.4; }
.trial-choices { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.trial-choice { margin-top: 0; font-size: 18px; padding: 12px 10px; border-radius: 14px; background: var(--card); border: 2px solid var(--leaf); color: var(--ink); }
.trial-choices.low-mode .trial-choice { font-size: 22px; padding: 16px 10px; background: var(--sun-pale); border-color: var(--sun); }
.trial-fb { font-size: 15px; color: var(--leaf-deep); min-height: 24px; }
.trial-next { margin-top: 4px; padding: 6px 12px; font-size: 14px; background: var(--leaf); color: #fff; border: none; }
.teacher-tools { margin-top: 18px; align-items: center; }
.teacher-tools small { color: var(--ink-soft); }
#teacherDialog { max-width: min(620px, 94vw); }
.tbox-links { display: grid; gap: 8px; margin: 10px 0 18px; }
.tbox-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; border: 1px solid var(--line); border-radius: 12px; padding: 8px 10px; background: var(--paper); }
.tbox-row b { font-family: var(--display); font-weight: 400; min-width: 96px; }
.tbox-row .mail { flex: 1; font-size: 12px; overflow-wrap: anywhere; }
.tbox-row .copy { margin-top: 0; }
#historyList { display: grid; gap: 10px; font-size: 15px; }
#historyList div { border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; background: var(--paper); }
#toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); background: var(--ink); color: #fff; font-family: var(--display); padding: 10px 18px; border-radius: 999px; opacity: 0; pointer-events: none; transition: opacity .25s; z-index: 60; }
#toast.show { opacity: 1; }
.rise { opacity: 0; transform: translateY(14px); transition: opacity .5s, transform .5s; }
.rise.in { opacity: 1; transform: none; }
@keyframes btnPulse {
  0%, 100% { box-shadow: 0 6px 0 rgba(0, 0, 0, .18), 0 0 0 0 rgba(242, 153, 46, .55); }
  50% { box-shadow: 0 6px 0 rgba(0, 0, 0, .18), 0 0 0 14px rgba(242, 153, 46, 0); }
}
.btn-pulse { animation: btnPulse 1.8s ease-in-out infinite; }
.gi-pulse { animation: btnPulse 1.8s ease-in-out infinite; }
@media (prefers-reduced-motion: reduce) {
  .btn-pulse { animation: none; }
  .gi-pulse { animation: none; }
  html { scroll-behavior: auto; }
  .rise { opacity: 1; transform: none; }
}