*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #050806;
  --panel: #0f1711;
  --accent: #6f8f3a;
  --text: #f2f4ef;
  --text-secondary: #b8c0b1;
  --border: #243024;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

/* Header */
header {
  background-color: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 1.2rem 1.5rem;
  text-align: center;
}

header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

/* Navigation */
nav {
  background-color: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 0.8rem 1.5rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover,
nav a:focus {
  color: var(--accent);
  text-decoration: none;
}

nav a.active {
  color: var(--accent);
}

/* Main */
main {
  flex: 1;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

h2 {
  font-size: 1.35rem;
  color: var(--accent);
  margin-top: 2.2rem;
  margin-bottom: 0.8rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 1.1rem;
  color: var(--text);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

p strong {
  color: var(--text);
}

ul,
ol {
  margin: 0.5rem 0 1.2rem 1.5rem;
  color: var(--text-secondary);
}

li {
  margin-bottom: 0.4rem;
}

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.2rem;
  margin: 1.5rem 0 2rem;
}

.card {
  background-color: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.card:hover {
  border-color: var(--accent);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.card p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Notice block */
.notice {
  background-color: var(--panel);
  border-left: 3px solid var(--accent);
  padding: 1.2rem 1.5rem;
  border-radius: 0 8px 8px 0;
  margin: 2rem 0;
}

.notice p {
  margin-bottom: 0;
}

/* Footer */
footer {
  background-color: var(--panel);
  border-top: 1px solid var(--border);
  padding: 1.2rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 600px) {
  main {
    padding: 1.2rem 1rem 2rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  nav {
    gap: 1rem;
  }
}