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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0f172a;
    color: #e2e8f0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header & Navigation */
header {
    background-color: #1e293b;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #334155;
}

header .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #38bdf8;
}

nav a {
    color: #94a3b8;
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover, nav a.active {
    color: #38bdf8;
}

/* Main Content Area */
main {
    flex: 1;
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

h1 {
    color: #f8fafc;
    margin-bottom: 15px;
}

p {
    line-height: 1.6;
    color: #94a3b8;
}

/* Footer */
footer {
    background-color: #1e293b;
    text-align: center;
    padding: 20px;
    border-top: 1px solid #334155;
    color: #64748b;
    font-size: 0.9rem;
}