:root {
	--bg: #f4f7fb;
	--surface: #ffffff;
	--text: #1f2937;
	--muted: #607089;
	--brand: #0f766e;
	--brand-dark: #115e59;
	--line: #d9e2ec;
}

* {
	box-sizing: border-box;
}

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

body {
	font-family: "Plus Jakarta Sans", "Segoe UI", sans-serif;
	color: var(--text);
	background:
		radial-gradient(1200px 300px at 20% -10%, #d7f8f3 0%, transparent 60%),
		radial-gradient(900px 220px at 90% -20%, #dfe9ff 0%, transparent 65%),
		var(--bg);
	line-height: 1.7;
}

.container {
	width: min(980px, 92vw);
	margin: 0 auto;
}

.site-header {
	position: sticky;
	top: 0;
	z-index: 10;
	background: rgba(255, 255, 255, 0.88);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--line);
}

.nav-wrap {
	display: flex;
	justify-content: space-between;
	align-items: center;
	min-height: 68px;
	gap: 1rem;
}

.brand {
	font-weight: 800;
	font-size: 1rem;
	color: var(--text);
	text-decoration: none;
	letter-spacing: 0.01em;
}

.site-nav {
	display: flex;
	gap: 1rem;
	flex-wrap: wrap;
}

.site-nav a {
	color: var(--muted);
	text-decoration: none;
	font-weight: 600;
	font-size: 0.95rem;
	padding: 0.35rem 0.6rem;
	border-radius: 8px;
	transition: color 0.2s ease, background-color 0.2s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
	color: var(--brand-dark);
	background-color: #e9f7f5;
}

.content {
	margin: 2rem auto 3rem;
	background: var(--surface);
	border: 1px solid var(--line);
	border-radius: 16px;
	padding: clamp(1rem, 2vw, 2rem);
	box-shadow: 0 12px 35px rgba(15, 23, 42, 0.08);
}

img {
  max-width: 800px;
  width: 100%;
  height: auto;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25);
  border-radius: 6px;
  display: block;
  margin: 20px auto;
}

h1,
h2,
h3 {
	line-height: 1.25;
	margin-top: 0;
}

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

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

.site-footer {
	padding: 0 0 2rem;
	color: var(--muted);
	text-align: center;
}

@media (max-width: 640px) {
	.nav-wrap {
		flex-direction: column;
		align-items: flex-start;
		padding: 0.75rem 0;
	}

	.site-nav {
		gap: 0.3rem;
	}
}