/* /google（Google アカウントをお持ちでない方へ）。/infinity-flogin と同じ色・書体。背景は純白。 */
:root {
  color-scheme: light;
  --ink: #1a1a1a;
  --mark: #3c4043;
  --sub: #5f6368;
  --border: #dadce0;
  --border-strong: #bdc1c6;
  --hover: #f8f9fa;
  --pressed: #f1f3f4;
  --font-en: "Inter", "Helvetica Neue", Arial, sans-serif;
  --font-ja: "Noto Sans JP", "Hiragino Sans", Meiryo, system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  background: #FFFFFF;
  color: var(--ink);
}

body {
  font-family: var(--font-ja);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.gpage {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.mark {
  margin: 0;
  color: var(--mark);
  font-size: 26px;
  line-height: 1;
}

.brand {
  margin: 28px 0 0;
  padding-left: 0.2em;
  font-family: var(--font-en);
  font-size: clamp(16px, 4.4vw, 20px);
  font-weight: 500;
  letter-spacing: 0.2em;
  line-height: 1.3;
}

.lead {
  margin: 36px 0 0;
  font-size: clamp(17px, 4.6vw, 22px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.6;
}

.lead br.sp {
  display: none;
}

@media (max-width: 479px) {
  .lead br.sp {
    display: inline;
  }
}

.sub {
  margin: 10px 0 0;
  color: var(--sub);
  font-size: clamp(13px, 3.6vw, 15px);
}

.options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 300px));
  justify-content: center;
  gap: 16px;
  width: 100%;
  max-width: 640px;
  margin-top: 36px;
}

.option {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 18px 18px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  text-align: left;
}

.option-tag {
  margin: 0;
  color: var(--sub);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.option-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  margin-top: 10px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #FFFFFF;
  color: #1f1f1f;
  font-size: 15px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition: background-color 120ms ease, border-color 120ms ease, transform 80ms ease;
}

@media (hover: hover) {
  .option-link:hover {
    background: var(--hover);
  }
}

.option-link:active {
  transform: translateY(1px) scale(0.99);
  background: var(--pressed);
  border-color: var(--border-strong);
}

.option-link:focus-visible,
.back:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.option-note {
  margin: 10px 0 0;
  color: var(--sub);
  font-size: 12px;
  line-height: 1.6;
}

.back-lead {
  margin: 36px 0 0;
  color: var(--sub);
  font-size: 13px;
}

.back {
  margin-top: 4px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  text-underline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  .option-link {
    transition: none;
  }
}