/* Basic Reset */
* {
    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 {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    list-style: none;
}

.nav-item {
    margin-left: 1.5rem;
}

.nav-link {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #3498db;
}

/* Main Content */
main {
    margin-top: 80px;
    min-height: calc(100vh - 160px);
}

/* Footer */
footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 2rem 0;
    margin-top: 2rem;
}

/* Buttons */
.btn {
    display: inline-block;
    background: #3498db;
    color: #fff;
    padding: 0.5rem 1.2rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.3s ease;
}

.btn:hover {
    background: #2980b9;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-control {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

/* Alerts */
.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 4px;
}

.alert-success {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        text-align: center;
    }
    
    .navbar-nav {
        margin-top: 1rem;
        flex-direction: column;
    }
    
    .nav-item {
        margin: 0.5rem 0;
    }
    
    main {
        margin-top: 140px;
    }
}