@charset "utf-8";

:root {
  --bg-top: #fffce5;
  --bg-bottom: #fff56f;
  --cta: #22c55e;
  --cta-dark: #16a34a;
  --cta-text: #ffffff;
  --shadow: 0 6px 18px rgba(0,0,0,.18);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, "Helvetica Neue", Arial, "ヒラギノ角ゴ ProN", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "メイリオ", Meiryo, sans-serif;
  background: linear-gradient(to bottom, var(--bg-top), var(--bg-bottom));
  display: flex;
  flex-direction: column;
  justify-content: flex-start;   /* 上寄せ */
  align-items: center;           /* 横方向中央 */
  text-align: center;
  color: #1f2937;
  padding-top: 20vh;             /* 上から20%下げる */
}

/* -------- Banner -------- */
.banner img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: transform .2s ease;
}
.banner img:hover { transform: scale(1.02); }

/* -------- CTA -------- */
.cta-wrap {
  margin-top: 20px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cta-button {
  text-decoration: none;
  font-weight: 700;
  background: var(--cta);
  color: var(--cta-text);
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: transform .06s ease, box-shadow .2s ease, background-color .1s ease;
  width: 90%;
  max-width: 640px;
  padding: 18px 24px;
  font-size: clamp(16px, 4.2vw, 22px);
}
.cta-button:hover,
.cta-button:focus-visible {
  background: var(--cta-dark);
  outline: 3px solid rgba(34,197,94,.35);
  outline-offset: 2px;
}
.cta-button:active { transform: translateY(1px); }

.cta-note {
  margin: 10px 0 0;
  font-size: 0.95rem;
  opacity: .85;
}