:root {
  --bg-0: #f5fbff;
  --bg-1: #e8fff8;
  --bg-2: #fff7ef;
  --ink: #17202a;
  --ink-muted: #4f5d6b;
  --card: #ffffff;
  --line: #dbe3eb;
  --brand: #0f766e;
  --brand-dark: #0b5f58;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Manrope", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  line-height: 1.65;
  background:
    radial-gradient(1100px 500px at 10% -10%, var(--bg-1), transparent),
    radial-gradient(900px 450px at 100% 0%, var(--bg-2), transparent),
    var(--bg-0);
}

.shell {
  max-width: 920px;
  margin: 0 auto;
  padding: 28px 16px 56px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand a {
  color: var(--ink);
  text-decoration: none;
}

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

.nav a {
  text-decoration: none;
  color: var(--ink-muted);
  font-weight: 700;
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 10px;
}

.nav a:hover {
  color: var(--brand-dark);
  background: #e9f8f5;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 8px 22px rgba(17, 24, 39, 0.05);
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.2;
}

h2 {
  margin-top: 28px;
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.35;
}

p,
li {
  color: var(--ink-muted);
}

ul {
  padding-left: 18px;
}

a {
  color: var(--brand-dark);
}

.meta {
  margin: 8px 0 20px;
  font-weight: 700;
  color: var(--brand);
}

.note {
  margin-top: 20px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #c5efe7;
  background: #f0fffb;
}

.hero {
  display: grid;
  gap: 10px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.btn {
  display: inline-block;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 700;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: var(--brand-dark);
}

.btn-ghost {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover {
  border-color: #b9c8d6;
}

.footer {
  margin-top: 14px;
  font-size: 13px;
  color: #6b7785;
}