* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px 16px;
  color: #fbf4ea; font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif;
  background: #050409 url(/img/background_desktop.webp) center / cover no-repeat fixed;
}
@media (max-aspect-ratio: 1/1) { body { background-image: url(/img/background_mobile.webp); } }
.gate { width: 100%; max-width: 380px; text-align: center; }
.g-title {
  margin: 0; font-family: "Hiragino Mincho ProN", "Yu Mincho", serif; font-weight: 600; font-size: clamp(40px, 13vw, 64px); letter-spacing: .14em; white-space: nowrap;
  background: linear-gradient(180deg, #fff8e2, #fde4a6 40%, #e8b85e 66%, #fff0c4); -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 6px rgba(255, 228, 170, .55)) drop-shadow(0 0 18px rgba(246, 195, 100, .4));
}
.g-sub { margin: 4px 0 26px; font-family: "Hiragino Mincho ProN", serif; letter-spacing: .5em; color: #fbe3b0; text-shadow: 0 0 10px rgba(246, 215, 140, .5); }
.g-form {
  display: grid; gap: 12px; padding: 22px 20px; border: 2px solid #ffe3a1; border-radius: 22px; background: rgba(5, 3, 10, .55);
  box-shadow: 0 0 4px rgba(255, 236, 190, .9), 0 0 16px rgba(246, 205, 120, .6), 0 0 40px rgba(246, 190, 100, .3), inset 0 0 0 4px rgba(246, 215, 140, .35);
}
.g-form label { font-family: "Hiragino Mincho ProN", serif; color: #fbe3b0; letter-spacing: .3em; }
.g-form input {
  width: 100%; min-height: 50px; padding: 0 14px; font-size: 18px; color: #fff; text-align: center;
  background: rgba(10, 6, 16, .9); border: 1px solid rgba(246, 215, 140, .5); border-radius: 14px;
}
.g-form input:focus { outline: 2px solid #f6d68f; outline-offset: 2px; }
.g-form button {
  min-height: 52px; border: 0; border-radius: 999px; font-size: 18px; font-weight: 700; color: #2a1426; cursor: pointer;
  background: linear-gradient(120deg, #fff0c8, #f0cf86 50%, #f3a9cf); box-shadow: 0 0 18px rgba(246, 215, 140, .45);
}
.g-form button:disabled { opacity: .6; }
.g-msg { min-height: 1.4em; margin: 0; font-size: 14px; color: #ffb3c8; }
.g-note { margin-top: 18px; font-size: 12px; color: #b9a8b6; }