/* Information pages for parents and teachers (static/learn/<lang>/). Sakura Sky colors, comic outlines. */
:root {
  --bg: #FFF5F8; --dot: #FBD3E0; --ink: #1d1d1f; --muted: #4f4f55; --card: #fff; --line: #111;
  --pink: #FBC8D8; --pink-dark: #C04877; --blue: #C3E5F8; --blue-dark: #2A78A8; --beige: #EADBC8;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; color: var(--ink); line-height: 1.65; font-size: 17px;
  font-family: system-ui, -apple-system, "Segoe UI Variable Text", "Segoe UI", Roboto, "Noto Sans", "PingFang TC", "PingFang SC",
    "Microsoft JhengHei", "Microsoft YaHei", "Noto Sans CJK TC", "Noto Sans CJK SC", sans-serif;
  font-weight: 400;
  background: var(--bg) radial-gradient(var(--dot) 2px, transparent 2.5px) 0 0 / 20px 20px;
}
a { color: var(--blue-dark); }
.hero, main, footer { max-width: 920px; margin: 0 auto; padding: 0 16px; }
.hero { padding-top: 0; text-align: center; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 300; font-size: 20px; margin: 0 0 8px; }
.brand img { display: block; }   /* transparent MyTeachers123 logo */
h1 { font-size: clamp(26px, 5vw, 40px); font-weight: 400; line-height: 1.25; margin: 8px 0 12px; }
h2 { font-size: clamp(20px, 3vw, 25px); font-weight: 500; line-height: 1.3; margin: 0 0 12px; }
.lead { font-size: 17px; font-weight: 400; color: var(--muted); max-width: 720px; margin: 0 auto 18px; }
.cta { margin: 18px 0 6px; }
.btn {
  display: inline-block; min-height: 48px; padding: 12px 26px; border-radius: 999px; text-decoration: none;
  font-weight: 500; letter-spacing: .02em; font-size: 18px; color: #fff; background: var(--pink-dark);
  border: 3px solid var(--line); box-shadow: 4px 4px 0 var(--line);
}
.btn:hover { transform: translate(1px, 1px); box-shadow: 3px 3px 0 var(--line); }
.btn:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--blue-dark); outline-offset: 3px; }
.btn.alt { background: var(--blue-dark); }
.note { color: var(--muted); font-size: 15px; margin: 4px 0 20px; }
.shot {
  width: 100%; height: auto; border-radius: 18px; border: 3px solid var(--line); box-shadow: 6px 6px 0 var(--line);
  background: #fff; margin: 4px 0 30px;
}
section {
  background: var(--card); border: 3px solid var(--line); border-radius: 18px; box-shadow: 5px 5px 0 var(--line);
  padding: 20px 22px; margin: 0 0 22px;
}
section.mt { background: #FFF0F5; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; vertical-align: top; padding: 9px 8px; border-top: 1px solid var(--beige); }
tr:first-child th, tr:first-child td { border-top: 0; }
th { width: 32%; font-weight: 500; }
ul, ol { padding-left: 1.3em; margin: 0; }
li { margin: 6px 0; }
details { border-top: 1px solid var(--beige); padding: 10px 0; }
details:first-of-type { border-top: 0; }
summary { cursor: pointer; font-weight: 500; min-height: 32px; }
details p { margin: 8px 0 0; color: var(--muted); }
footer { padding-bottom: 40px; font-size: 15px; color: var(--muted); }
footer h2 { font-size: 18px; margin: 10px 0 8px; }
.langs { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.langs li { margin: 0; }
.langs a {
  display: inline-block; min-height: 44px; padding: 10px 14px; border-radius: 999px; background: #fff;
  border: 2px solid var(--line); color: var(--ink); text-decoration: none; font-weight: 500;
}
.langs a[aria-current="page"] { background: var(--pink); }
@media (max-width: 560px) {
  body { font-size: 16px; }
  section { padding: 16px; }
  th { width: 38%; }
}

section.why { background: #F4FAFE; }
section.why li { margin: 10px 0; }

/* Top bar: language menu on the right */
.topbar { max-width: 920px; margin: 0 auto; padding: 12px 16px 0; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
/* back to the catalog of all MyTeachers123 apps */
.home-link { color: var(--ink); text-decoration: none; font-weight: 400; font-size: 15px; padding: 10px 4px; min-height: 44px; display: inline-flex; align-items: center; }
.home-link:hover { text-decoration: underline; }
/* Hero: MyTeachers123 logo (parent company, links to myteachers123.com) and the app name, centered and large */
.logo { display: inline-block; line-height: 0; border: 0; }
.logo img { display: block; width: 160px; height: 160px; background: none; border: 0; box-shadow: none; }
.lang-menu { position: relative; }
.lang-menu summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; min-height: 44px; padding: 8px 14px;
  border: 2px solid var(--line); border-radius: 999px; background: #fff; font-weight: 500; box-shadow: 3px 3px 0 var(--line);
}
.lang-menu summary::-webkit-details-marker { display: none; }
.lang-menu summary svg { margin-right: 8px; }
.lang-menu summary::after { content: ""; width: 8px; height: 8px; margin-left: 10px; border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink); transform: rotate(45deg) translate(-2px, -2px); }
.lang-menu[open] summary::after { transform: rotate(-135deg) translate(-2px, -2px); }
.lang-menu ul {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 10; list-style: none; margin: 0; padding: 6px;
  min-width: 190px; max-height: 70vh; overflow-y: auto; background: #fff; border: 2px solid var(--line);
  border-radius: 14px; box-shadow: 4px 4px 0 var(--line);
}
.lang-menu li { margin: 0; }
.lang-menu a { display: block; min-height: 44px; padding: 11px 14px; border-radius: 10px; color: var(--ink); text-decoration: none; font-weight: 500; }
.lang-menu a:hover, .lang-menu a:focus { background: #FFF0F5; }
.lang-menu a[aria-current="page"] { background: var(--pink); }
.hero .brand { display: block; font-size: clamp(32px, 6vw, 52px); font-weight: 300; letter-spacing: .01em; line-height: 1.15; margin: 6px 0 12px; }
.hero h1 { font-size: clamp(15px, 1.9vw, 17px); font-weight: 400; color: #6b6b72; line-height: 1.55; margin: 0 auto 14px; max-width: 640px; }
.nw { white-space: nowrap; }
/* Brand slogan of the MyTeachers123.com app series ("Short play, real learning."): the visual line under the name */
.hero .slogan { font-size: clamp(19px, 2.8vw, 25px); font-weight: 300; letter-spacing: .02em; color: var(--pink-dark); margin: 0 0 14px; }
@media (max-width: 600px) { .logo img { width: 120px; height: 120px; } }
section.real { background: #FFF0F5; }
section.real ol li { margin: 8px 0; }
.small { font-size: 15px; color: var(--muted); }
.shot.inner { margin: 14px 0 0; box-shadow: 4px 4px 0 var(--line); }
footer .copyright { font-size: 13px; margin: 6px 0 0; }