:root {
  --color-dark: #0f172a;
  --color-text: rgba(15, 23, 42, 0.82);
  --color-muted: rgba(15, 23, 42, 0.62);
  --color-border: rgba(15, 23, 42, 0.12);
  --color-bg: #f8fafc;
  --color-card: #ffffff;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

.container {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
  padding: 38px 0 56px;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: rgba(15, 23, 42, 0.92);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand img {
  height: 26px;
  width: auto;
  display: block;
}

.link {
  color: rgba(15, 23, 42, 0.72);
  text-decoration: none;
  font-weight: 600;
}

.link:hover {
  color: rgba(15, 23, 42, 0.92);
}

.card {
  margin-top: 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-card);
  padding: 26px;
}

h1 {
  margin: 0 0 10px;
  font-family: "Helvetica Neue", Helvetica, Arial, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  letter-spacing: -0.03em;
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.12;
  color: rgba(15, 23, 42, 0.92);
}

p {
  margin: 0;
  color: var(--color-muted);
  font-size: 16px;
}

.meta {
  margin-top: 10px;
  font-size: 14px;
  color: rgba(15, 23, 42, 0.55);
}

@media (max-width: 560px) {
  .top {
    flex-direction: column;
    align-items: flex-start;
  }
}