/* Support, privacy and terms pages: the same dark hall as the landing page, text in a card. */
@font-face { font-family: 'Monoton'; src: url('fonts/Monoton.ttf') format('truetype'); font-display: swap; }
:root { color-scheme: dark; --bg: #0c0a17; --card: #15122a; --text: #ece8f6; --muted: #a59fbd; --accent: #ff8fc7; --pink: #ff5fa8; --line: #2a2540; }
* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(ellipse at 50% 0%, rgba(255, 95, 168, .14), transparent 55%) no-repeat, var(--bg); color: var(--text);
  font: 16px/1.8 'Hiragino Maru Gothic ProN', 'Zen Maru Gothic', 'Hiragino Sans', 'Noto Sans JP', sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
.nw { display: inline-block; }

/* Header: logo back to the top page, like the landing page */
.sub-top { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 16px; padding: 12px 20px;
  background: rgba(12, 10, 23, .78); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid rgba(255, 255, 255, .06); }
.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; text-decoration: none; }
.brand img { border-radius: 8px; }
.logo { font-family: 'Monoton', sans-serif; font-size: 18px; white-space: nowrap; color: #ffd6ea; text-shadow: 0 0 6px var(--pink), 0 0 18px rgba(255, 95, 168, .7); }
.back { display: inline-flex; align-items: center; gap: 6px; min-height: 38px; padding: 0 16px; border-radius: 999px; border: 1px solid var(--line);
  color: var(--text); text-decoration: none; font-size: 14px; white-space: nowrap; }
.back::before { content: '←'; color: var(--pink); }
.back:hover { border-color: var(--pink); box-shadow: 0 0 16px rgba(255, 95, 168, .3); }

/* Card */
main.card { max-width: 760px; margin: 40px auto 0; padding: 44px 48px 52px; background: var(--card); border: 1px solid var(--line); border-radius: 28px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, .35), 0 0 60px rgba(255, 95, 168, .08); }
h1 { margin: 0 0 12px; font-size: clamp(28px, 5vw, 38px); line-height: 1.3; }
.h1-app { display: block; margin-bottom: 4px; font: 400 clamp(22px, 4vw, 30px)/1.3 'Monoton', sans-serif; color: #ffd6ea; text-shadow: 0 0 6px var(--pink), 0 0 20px rgba(255, 95, 168, .6); }
h2 { margin: 44px 0 10px; padding-bottom: 8px; border-bottom: 1px solid var(--line); font-size: 20px; }
h3 { margin: 26px 0 6px; font-size: 17px; }
p, li { color: var(--text); }
.date { color: var(--muted); font-size: 14px; }
ul { padding-left: 1.3em; }
.contact { font-weight: 700; font-size: 18px; }

/* Footer */
.sub-foot { max-width: 760px; margin: 0 auto; padding: 36px 20px 56px; text-align: center; color: var(--muted); font-size: 12px; }
.sub-links { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px 20px; margin: 0 0 10px; font-size: 14px; }
.sub-links a { color: var(--text); text-decoration: none; }
.sub-links a:hover { color: var(--pink); }

/* PC: the same header size as the landing page, and body text a little larger */
@media (min-width: 901px) {
  body { font-size: 17px; }
  .logo { font-size: 22px; }
  .brand img { width: 36px; height: 36px; }
  .back { min-height: 42px; padding: 0 20px; font-size: 15px; }
  main.card { max-width: 820px; padding: 52px 60px 60px; }
  h2 { font-size: 22px; }
  h3 { font-size: 18px; }
  .date { font-size: 15px; }
  .sub-links { font-size: 15px; }
  .sub-foot { font-size: 13px; }
}
@media (max-width: 600px) {
  .sub-top { padding: 10px 16px; gap: 10px; }
  .brand img { width: 28px; height: 28px; }
  .logo { font-size: 15px; }
  .back { min-height: 34px; padding: 0 12px; font-size: 13px; }
  main.card { margin: 20px 12px 0; padding: 28px 20px 36px; border-radius: 22px; }
}