:root {
    --green-dark: #1b4332;
    --green-primary: #2d6a4f;
    --green-light: #e9f5ee;
    --text-main: #1f2937;
    --text-muted: #4b5563;
    --bg-page: #f8faf9;
    --bg-card: #ffffff;
    --border-color: #d1fae5;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-main);
    background-color: var(--bg-page);
    line-height: 1.65;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: 920px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--green-dark);
    color: #ffffff;
    border-bottom: 4px solid var(--green-primary);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    gap: 16px;
}

.brand {
    font-size: 1.35rem;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.brand span {
    display: block;
    font-size: 0.78rem;
    font-weight: 400;
    color: #a7f3d0;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

nav a {
    color: #ecfdf5;
    text-decoration: none;
    font-size: 0.92rem;
    padding: 6px 12px;
    border-radius: 6px;
    transition: background-color 0.15s ease;
}

nav a:hover {
    background-color: var(--green-primary);
    color: #ffffff;
}

main {
    flex: 1;
    padding: 36px 0;
}

section.card {
    background: var(--bg-card);
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 36px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    margin-bottom: 28px;
    scroll-margin-top: 90px;
}

h1 {
    color: var(--green-dark);
    font-size: 1.8rem;
    margin-bottom: 12px;
}

h2 {
    color: var(--green-dark);
    font-size: 1.4rem;
    margin-bottom: 12px;
}

h3 {
    color: var(--green-dark);
    font-size: 1.15rem;
    margin-top: 24px;
    margin-bottom: 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid #e5e7eb;
}

p {
    margin-bottom: 14px;
    color: var(--text-muted);
}

ul, ol {
    margin: 0 0 16px 24px;
    color: var(--text-muted);
}

li {
    margin-bottom: 8px;
}

a {
    color: var(--green-primary);
}

.meta-badge {
    display: inline-block;
    background: var(--green-light);
    color: var(--green-dark);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 999px;
    margin-bottom: 16px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin: 20px 0;
}

.info-box {
    background: var(--green-light);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 18px;
}

.info-box h4 {
    color: var(--green-dark);
    font-size: 1rem;
    margin-bottom: 6px;
}

.info-box p {
    font-size: 0.92rem;
    margin-bottom: 8px;
}

.btn-link {
    display: inline-block;
    color: var(--green-primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
}

.btn-link:hover {
    text-decoration: underline;
}

footer {
    background-color: #111827;
    color: #9ca3af;
    font-size: 0.88rem;
    padding: 32px 0;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 20px;
}

footer h4 {
    color: #f9fafb;
    font-size: 0.95rem;
    margin-bottom: 10px;
}

footer p, footer a {
    color: #9ca3af;
    font-size: 0.85rem;
    margin-bottom: 6px;
    text-decoration: none;
}

footer a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 16px;
    text-align: center;
    font-size: 0.8rem;
}

@media (max-width: 600px) {
    section.card {
        padding: 22px;
    }
    h1 {
        font-size: 1.45rem;
    }
    h2 {
        font-size: 1.25rem;
    }
}