:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --text-color: #333;
    --bg-color: #f9f9f9;
    --container-width: 1200px;
    --spacing: 1rem;
}

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

body {
    font-family: system-ui, -apple-system, sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: inherit;
    
    &:hover {
        color: var(--primary-color);
    }
}

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing);
}

/* Header */
.main-header {
    background: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    padding: var(--spacing) 0;

    .header-top {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: var(--spacing);

        .logo {
            font-size: 1.5rem;
            font-weight: bold;
            color: var(--primary-color);
        }

        .search-bar {
            flex-grow: 1;
            margin: 0 2rem;
            
            form {
                display: flex;
            }

            input {
                width: 100%;
                padding: 0.5rem;
                border: 1px solid #ddd;
                border-radius: 4px 0 0 4px;
            }

            button {
                padding: 0.5rem 1rem;
                background: var(--secondary-color);
                color: white;
                border: none;
                border-radius: 0 4px 4px 0;
                cursor: pointer;
            }
        }

        .user-actions {
            display: flex;
            gap: 1rem;

            .action-link {
                font-size: 0.9rem;
            }
        }
    }

    .main-nav ul {
        display: flex;
        gap: 1.5rem;
        border-top: 1px solid #eee;
        padding-top: 0.5rem;
    }
}

/* Main */
main {
    padding: 2rem var(--spacing);
    min-height: 60vh;
}

/* Footer */
.main-footer {
    background: var(--secondary-color);
    color: white;
    padding: 2rem 0;
    margin-top: auto;

    .footer-columns {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 2rem;
        margin-bottom: 2rem;

        h3 {
            margin-bottom: 1rem;
            border-bottom: 2px solid var(--primary-color);
            display: inline-block;
        }

        ul li {
            margin-bottom: 0.5rem;
        }
    }

    .copyright {
        text-align: center;
        border-top: 1px solid rgba(255,255,255,0.1);
        padding-top: 1rem;
    }
}

/* Utilities */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: 4px;
    cursor: pointer;
    border: none;

    &:hover {
        opacity: 0.9;
    }
}