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

:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --dark-blue: #003366;
    --nav-blue: #00509e;
    --yellow: #f2c230;
    --yellow-dark: #ddb11f;
    --text-dark: #1a1a1a;
    --text-mid: #4a4a4a;
    --muted: #888;
    --border: #ddd;
    --mono: 'IBM Plex Mono', monospace;
    --sans: 'IBM Plex Sans', sans-serif;
}

body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text-dark);
    min-height: 100vh;
}

.header {
    background-color: var(--dark-blue);
    color: white;
    padding: 40px;
    font-size: 40px;
    font-weight: bold;
    text-align: center;
}

.navbar {
    display: flex;
    justify-content: center;
    gap: 25px;
    background-color: var(--nav-blue);
    padding: 12px;
    flex-wrap: wrap;
}

.navbar a {
    color: white;
    text-decoration: none;
    font-size: 18px;
    padding: 8px 14px;
    border-radius: 6px;
    transition: 0.2s ease;
}

.navbar a:hover {
    background-color: var(--yellow);
    color: var(--dark-blue);
}

.navbar a.active {
    background-color: var(--yellow);
    color: var(--dark-blue);
}

.middle {
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
    text-align: center;
    padding-top: 30px;
}

.link-button {
    font-size: 20px;
    padding: 12px 25px;
    background-color: #f2c230;
    color: #003b73;
    text-decoration: none;
    border-radius: 6px;
    font-weight: bold;
}

.link-button:hover {
    background-color: #ddb11f;
}

.section {
    width: 80%;
    max-width: 900px;
    text-align: left;
    background-color: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.section-title {
    font-size: 26px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #003b73;
}

.section-content {
    font-size: 18px;
    line-height: 1.6;
}