:root {
  color-scheme: light dark;
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  background: Canvas;
  color: CanvasText;
  --border: color-mix(in srgb, CanvasText 12%, transparent);
  --secondary: color-mix(in srgb, CanvasText 58%, transparent);
  --surface: color-mix(in srgb, CanvasText 5%, Canvas);
  --pink: #ed45bd;
}

* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; background: Canvas; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
.app-header {
  min-height: calc(56px + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) max(20px, env(safe-area-inset-right)) 0 max(20px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: color-mix(in srgb, Canvas 94%, transparent);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
}
.brand {
  color: var(--pink);
  font-size: 19px;
  font-weight: 800;
  text-decoration: none;
}
.header-action {
  min-height: 40px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: CanvasText;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}
#app {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: 40px max(20px, env(safe-area-inset-right)) calc(64px + env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
}
.message-page { padding-top: clamp(64px, 14vh, 128px) !important; }
.message-page h1 {
  max-width: 16em;
  margin: 0 0 20px;
  font-size: clamp(30px, 7vw, 44px);
  line-height: 1.3;
  letter-spacing: -0.02em;
}
.message-page p { max-width: 34em; margin: 0; font-size: 16px; line-height: 1.8; }
.primary-action {
  display: inline-flex;
  min-height: 48px;
  margin-top: 28px;
  padding: 12px 20px;
  border: 0;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  background: var(--pink);
  color: white;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
}
.supporting { margin-top: 20px !important; color: var(--secondary); font-size: 13px !important; }
.friend-profile-page {
  display: flex;
  padding-top: clamp(48px, 10vh, 96px) !important;
  align-items: center;
  flex-direction: column;
  text-align: center;
}
.friend-profile-identity { display: flex; width: min(100%, 480px); align-items: center; flex-direction: column; }
.friend-profile-avatar {
  display: grid;
  width: 112px;
  height: 112px;
  border-radius: 50%;
  place-items: center;
  object-fit: cover;
  background: var(--surface);
  color: var(--pink);
  font-size: 36px;
  font-weight: 800;
}
.friend-profile-identity h1 {
  margin: 24px 0 0;
  font-size: clamp(30px, 7vw, 44px);
  line-height: 1.25;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}
.friend-profile-handle { margin: 6px 0 0; color: var(--secondary); font-size: 14px; }
.friend-profile-bio { max-width: 34em; margin: 20px 0 0; font-size: 15px; line-height: 1.75; white-space: pre-wrap; }
.friend-profile-action { margin-top: 32px; }
.friend-profile-supporting { max-width: 34em; line-height: 1.65; }
.avatar-fallback { display: grid; place-items: center; color: var(--pink); font-weight: 800; }
.legal-navigation {
  display: flex;
  width: 100%;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px 20px;
}
.legal-navigation a { color: CanvasText; font-size: 13px; text-underline-offset: 3px; }
.legal-page { max-width: 680px; }
.legal-page h1 { margin: 0; font-size: clamp(30px, 7vw, 42px); line-height: 1.3; }
.legal-metadata { margin: 12px 0 0; color: var(--secondary); font-size: 13px; }
.legal-lead { margin: 28px 0 0; font-size: 16px; line-height: 1.9; }
.legal-section { margin-top: 36px; }
.legal-section h2 { margin: 0 0 12px; font-size: 20px; line-height: 1.45; }
.legal-section p { margin: 10px 0 0; font-size: 15px; line-height: 1.9; }

@media (max-width: 420px) {
  #app { padding-inline: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}