* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
}
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-size: 1.8rem;
    font-weight: bold;
}
.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}
.nav-menu a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}
.nav-menu a:hover {
    opacity: 0.8;
}
main {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}
footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 2rem 0;
}
footer a {
    color: #667eea;
}
.discussion-thread {
    background: white;
    padding: 1.5rem;
    margin: 1rem 0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.member-card {
    background: white;
    padding: 1rem;
    margin: 1rem;
    border-radius: 8px;
    text-align: center;
    display: inline-block;
    width: 200px;
}