body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, sans-serif;
    line-height: 1.6;
    background: #f9f9f9;
    color: #333;
}

/* ----- Header ----- */
header {
    text-align: center;
    padding: 60px 20px 40px;
    background: #2d2d2d;
    color: white;
}

header h1 {
    margin: 0;
    font-size: 42px;
}

header .tagline {
    font-size: 16px;
    opacity: 0.85;
}

/* ----- Navigation ----- */
nav {
    display: flex;
    justify-content: center;
    background: #444;
    gap: 0;
}

nav > a,
nav .dropbtn {
    color: white;
    text-decoration: none;
    padding: 14px 20px;
    display: inline-block;
    border: none;
    background: #444;
    cursor: pointer;
    font-size: 16px;
}

nav > a:hover,
nav .dropbtn:hover {
    background: #111;
}

/* ----- Dropdown Menu ----- */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    background-color: #444;
    min-width: 220px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    z-index: 1;
}

.dropdown-content a {
    color: white;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-content a:hover {
    background-color: #111;
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* ----- Main Content ----- */
main {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px 60px;
    box-sizing: border-box;
}

main h1, main h2, main h3 {
    color: #222;
}

main h2 {
    border-bottom: 3px solid #444;
    padding-bottom: 6px;
    margin-top: 32px;
}

/* ----- Cards ----- */
.card {
    background: white;
    padding: 20px;
    margin: 20px 0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.card h3 {
    margin-top: 0;
}

/* ----- Buttons ----- */
.button {
    display: inline-block;
    padding: 10px 16px;
    background: #2d6cdf;
    color: white;
    border-radius: 5px;
    text-decoration: none;
    margin-top: 10px;
}

.button:hover {
    background: #1a4da3;
}

/* ----- Footer ----- */
footer {
    text-align: center;
    padding: 25px;
    background: #2d2d2d;
    color: #ccc;
}