:root {
  color-scheme: light;
  --ink: #10253f;
  --muted: #607086;
  --line: #dce5ee;
  --paper: #ffffff;
  --wash: #f3f7fb;
  --blue: #0f5bd8;
  --green: #17834f;
}

* { box-sizing: border-box; }

html { font-size: 16px; }

body {
  margin: 0;
  background: var(--wash);
  color: var(--ink);
  font-family: Tahoma, Arial, sans-serif;
  line-height: 1.8;
}

a { color: var(--blue); }

.shell {
  width: min(920px, calc(100% - 32px));
  margin: 40px auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}

.mark {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 14px;
  background: var(--ink);
  color: #fff;
  font-size: 1.4rem;
  font-weight: 800;
}

.brand strong { display: block; font-size: 1.08rem; }
.brand span { color: var(--muted); font-size: .9rem; }

main {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--paper);
  box-shadow: 0 18px 50px rgba(16, 37, 63, .08);
}

.hero {
  padding: 42px 48px 34px;
  background: linear-gradient(135deg, #10253f, #173e62);
  color: #fff;
}

.eyebrow { margin: 0 0 8px; color: #a8cffb; font-weight: 700; }
h1 { margin: 0; font-size: clamp(1.8rem, 5vw, 2.7rem); line-height: 1.35; }
.hero p { max-width: 650px; margin: 14px 0 0; color: #d9e7f4; }

.content { padding: 34px 48px 44px; }
h2 { margin: 32px 0 10px; font-size: 1.3rem; }
h2:first-child { margin-top: 0; }
p, li { color: #30445b; }
ul, ol { padding-inline-start: 24px; }

.notice {
  margin: 24px 0;
  padding: 18px 20px;
  border-inline-start: 4px solid var(--green);
  border-radius: 12px;
  background: #edf8f2;
}

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 12px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}
.button.secondary { background: #eaf1fa; color: var(--ink); }

footer {
  padding: 20px 4px 0;
  color: var(--muted);
  text-align: center;
  font-size: .9rem;
}

@media (max-width: 640px) {
  .shell { width: min(100% - 20px, 920px); margin: 18px auto; }
  .hero, .content { padding: 28px 22px; }
  main { border-radius: 18px; }
}