:root {
  color-scheme: light;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --blue: #3478f6;
  --blue-soft: #eef5ff;
  --page: #f7f8fb;
  --card: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI",
    sans-serif;
  color: var(--ink);
  line-height: 1.58;
}

body {
  margin: 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1;
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
  background: rgba(247, 248, 251, 0.92);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 32px, 900px);
  min-height: 68px;
  margin: 0 auto;
}

.brand {
  color: #000;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.9rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--ink);
}

main {
  width: min(100% - 32px, 760px);
  margin: 48px auto 72px;
}

.document {
  padding: clamp(24px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--card);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.07);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI",
    sans-serif;
  letter-spacing: -0.035em;
}

h1 {
  margin: 0;
  font-size: clamp(2.1rem, 8vw, 3.65rem);
  line-height: 1.03;
}

h2 {
  margin: 36px 0 10px;
  font-size: 1.3rem;
  line-height: 1.2;
}

p,
li {
  color: #334155;
}

.effective {
  margin: 12px 0 32px;
  color: var(--muted);
}

.notice {
  margin: 28px 0;
  padding: 18px 20px;
  border: 1px solid #cfe1ff;
  border-radius: 18px;
  background: var(--blue-soft);
}

.notice p {
  margin: 0;
}

ol,
ul {
  padding-left: 1.35rem;
}

li + li {
  margin-top: 8px;
}

.contact {
  word-break: break-word;
}

.site-footer {
  width: min(100% - 32px, 760px);
  margin: -38px auto 44px;
  color: var(--muted);
  font-size: 0.86rem;
  text-align: center;
}

.callback-page {
  min-height: 100vh;
  background: #f2f2f7;
}

.callback-main {
  display: grid;
  width: min(100% - 32px, 460px);
  min-height: 100vh;
  margin: 0 auto;
  place-items: center;
}

.callback-card {
  width: 100%;
  padding: 36px 28px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 30px;
  background: #fff;
  box-shadow: 0 22px 60px rgba(15, 23, 42, 0.1);
  text-align: center;
}

.callback-card h1 {
  margin-top: 20px;
  font-size: clamp(2rem, 9vw, 2.8rem);
}

.callback-card p {
  margin: 12px 0 26px;
  color: var(--muted);
}

.callback-mark {
  display: grid;
  width: 72px;
  height: 72px;
  margin: 0 auto;
  border-radius: 22px;
  background: #3478f6;
  color: #fff;
  font-size: 2rem;
  font-weight: 900;
  place-items: center;
}

.callback-button {
  display: flex;
  min-height: 56px;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: #111827;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 800;
  text-decoration: none;
}

@media (max-width: 620px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 14px 0;
  }

  .nav-links {
    gap: 12px;
    flex-wrap: wrap;
  }

  main {
    margin-top: 24px;
  }

  .document {
    border-radius: 22px;
  }
}