:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #5e6b7f;
  --line: #dbe3ee;
  --accent: #0f8b8d;
  --accent-dark: #0a6a6c;
  --warm: #f2b84b;
  --shadow: 0 24px 70px rgba(23, 32, 51, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 20%, rgba(15, 139, 141, 0.16), transparent 34%),
    radial-gradient(circle at 85% 80%, rgba(242, 184, 75, 0.22), transparent 30%),
    var(--bg);
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 18px;
}

.notice {
  width: min(100%, 680px);
  padding: clamp(28px, 6vw, 54px);
  text-align: center;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.brand-mark {
  position: relative;
  width: 180px;
  height: 88px;
  margin: 0 auto 28px;
}

.dot,
.path {
  position: absolute;
  display: block;
}

.dot {
  width: 58px;
  height: 58px;
  top: 15px;
  border-radius: 50%;
  box-shadow: 0 14px 30px rgba(15, 139, 141, 0.24);
}

.dot-one {
  left: 0;
  background: var(--accent);
}

.dot-two {
  right: 0;
  background: var(--warm);
}

.path {
  left: 46px;
  right: 46px;
  top: 41px;
  height: 8px;
  background: linear-gradient(90deg, var(--accent), var(--warm));
  border-radius: 999px;
}

.path::before {
  content: "";
  position: absolute;
  right: -8px;
  top: -9px;
  width: 26px;
  height: 26px;
  border-top: 8px solid var(--warm);
  border-right: 8px solid var(--warm);
  transform: rotate(45deg);
  border-radius: 3px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

h1 {
  max-width: 620px;
  margin: 0 auto;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.bookmark-reminder {
  max-width: 520px;
  margin: 24px auto 0;
  padding: 16px 18px;
  color: #5b3b00;
  background: #fff4d8;
  border: 2px solid var(--warm);
  border-radius: 8px;
  font-size: clamp(1.05rem, 2.4vw, 1.2rem);
  line-height: 1.45;
}

.bookmark-reminder strong {
  display: block;
  margin-bottom: 3px;
  color: #3f2900;
  font-size: 1.08em;
}

.bookmark-reminder span {
  font-weight: 700;
}

.summary {
  max-width: 560px;
  margin: 18px auto 0;
  font-size: clamp(1rem, 2.3vw, 1.18rem);
  line-height: 1.65;
  color: var(--muted);
}

.banner {
  margin: 28px auto 24px;
  padding: 14px 18px;
  max-width: 440px;
  color: #114244;
  background: #e6f6f6;
  border: 1px solid #bfe3e4;
  border-radius: 8px;
  font-size: 1rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  color: #ffffff;
  background: var(--accent);
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  transition: background 160ms ease, transform 160ms ease;
}

.button:hover,
.button:focus-visible {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.button:focus-visible {
  outline: 3px solid rgba(15, 139, 141, 0.35);
  outline-offset: 3px;
}

@media (max-width: 520px) {
  .notice {
    padding: 28px 20px;
  }

  .brand-mark {
    transform: scale(0.82);
    margin-bottom: 18px;
  }

  .button {
    width: 100%;
  }
}