body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: Arial, sans-serif;
    background-color: #f5f7fa;
}

header {
    background-color: #e4ebf3;
    text-align: center;
    padding: 25px;
    font-size: 22px;
    font-weight: bold;
    color: #2d3e50;
}

footer {
    background-color: #2d3e50;
    text-align: center;
    padding: 15px;
    color: #ffffff;
    font-size: 14px;
    margin-top: auto;
}

.menu, .menu ul {
    line-height: 1;
    margin: 0;
    padding: 0;
    list-style-type: none;
}

.menu {
    display: block;
    position: relative;
    height: 50px;
    width: 100%;
    background: #1e2a38;
    top: 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    overflow: visible;
}

.menu ul > li {
    display: block;
    position: relative;
    float: left;
}

.menu li > a {
    display: block;
    color: #fff;
    padding: 16px 20px;
    text-align: center;
    font-size: 16px;
    font-weight: 400;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.menu li:hover > a {
    background-color: #324a5f;
    color: #f1c40f;
}

.dropdown {
    position: absolute;
    top: 50px;
    left: 0;
    background: #f0f0f0;
    min-width: 180px;
    padding: 5px 0;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    z-index: 1000;
}

.menu li:hover > .dropdown {
    opacity: 1;
    visibility: visible;
}

.dropdown li {
    float: none;
}

.dropdown li a {
    padding: 12px 16px;
    color: #000;
    text-align: left;
    display: block;
}

.dropdown li a:hover {
    background-color: #555;
    color: #fff;
}

div.flex-container {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 20px;
    margin: 20px auto;
    width: 95%;
    max-width: 1200px;
}

div.flex-container > div {
    flex: 1;
    margin: 10px;
    border: 2px solid #2d3e50;
    padding: 15px;
    border-radius: 10px;
    background-color: #fff;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

#main {
    width: 100%;
    height: auto;
    max-width: 100%;
    border-radius: 10px;
}

button {
    background-color: #1e2a38;
    color: #fff;
    border: none;
    padding: 10px 20px;
    margin: 10px 5px 0 0;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
}

button:hover {
    background-color: #324a5f;
}

#valjund {
    margin-top: 15px;
    font-size: 16px;
    color: #2d3e50;
}

a {
    text-decoration: none;
}